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Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/ MC SS02 7.1 Mobile Communications Chapter 7: Wireless LANs Characteristics IEEE 802.11 PHY MAC Roaming .11a, b, g, h, i … HIPERLAN Standards overview HiperLAN2 QoS Bluetooth Comparison

Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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Page 1: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

1

Mo

bile

Co

mm

un

icat

ion

s C

hap

ter

7: W

irel

ess

LA

Ns

Cha

ract

eris

tics

IEE

E 8

02.1

1P

HY

MA

C

Roa

min

g.1

1a, b

, g, h

, i …

HIP

ER

LAN

Sta

ndar

ds o

verv

iew

Hip

erLA

N2

QoS

Blu

etoo

thC

ompa

rison

Page 2: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

2

Cha

ract

eris

tics

of w

irele

ss L

AN

s

Adv

anta

ges

very

flex

ible

with

in th

e re

cept

ion

area

Ad-

hoc

netw

orks

with

out p

revi

ous

plan

ning

pos

sibl

e(a

lmos

t) n

o w

iring

diff

icul

ties

(e.g

. his

toric

bui

ldin

gs, f

irew

alls

)

mor

e ro

bust

aga

inst

dis

aste

rs li

ke, e

.g.,

eart

hqua

kes,

fire

-or

use

rs p

ullin

g a

plug

...

Dis

adva

ntag

esty

pica

lly v

ery

low

ban

dwid

th c

ompa

red

to w

ired

netw

orks

(1

-10

Mbi

t/s)

man

y pr

oprie

tary

sol

utio

ns, e

spec

ially

for

high

er b

it-ra

tes,

sta

ndar

ds ta

ke

thei

r tim

e (e

.g. I

EE

E 8

02.1

1)

prod

ucts

hav

e to

follo

w m

any

natio

nal r

estr

ictio

ns if

wor

king

wire

less

, it

take

s a

vary

long

tim

e to

est

ablis

h gl

obal

sol

utio

ns li

ke, e

.g.,

IMT

-200

0

Page 3: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

3

Des

ign

goal

s fo

r w

irele

ss L

AN

s

glob

al, s

eam

less

ope

ratio

n

low

pow

er fo

r ba

ttery

use

no s

peci

al p

erm

issi

ons

or li

cens

es n

eede

d to

use

the

LAN

ro

bust

tran

smis

sion

tech

nolo

gy

sim

plifi

ed s

pont

aneo

us c

oope

ratio

n at

mee

tings

easy

to u

se fo

r ev

eryo

ne, s

impl

e m

anag

emen

t pr

otec

tion

of in

vest

men

t in

wire

d ne

twor

ks

secu

rity

(no

one

shou

ld b

e ab

le to

rea

d m

y da

ta),

priv

acy

(no

one

shou

ld

be a

ble

to c

olle

ct u

ser

prof

iles)

, saf

ety

(low

rad

iatio

n)

tran

spar

ency

con

cern

ing

appl

icat

ions

and

hig

her

laye

r pr

otoc

ols,

but a

lso

loca

tion

awar

enes

s if

nece

ssar

y

Page 4: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

4

Com

paris

on: i

nfra

red

vs. r

adio

tran

smis

sion

Infr

ared

uses

IR d

iode

s, d

iffus

e lig

ht,

mul

tiple

ref

lect

ions

(w

alls

, fu

rnitu

re e

tc.)

Adv

anta

ges

sim

ple,

che

ap, a

vaila

ble

in

man

y m

obile

dev

ices

no li

cens

es n

eede

d

sim

ple

shie

ldin

g po

ssib

le

Dis

adva

ntag

esin

terf

eren

ce b

y su

nlig

ht, h

eat

sour

ces

etc.

man

y th

ings

shi

eld

or a

bsor

b IR

lig

ht

low

ban

dwid

th

Exa

mpl

e IrD

A (

Infr

ared

Dat

a A

ssoc

iatio

n)

inte

rfac

e av

aila

ble

ever

ywhe

re

Rad

ioty

pica

lly u

sing

the

licen

se fr

ee

ISM

ban

d at

2.4

GH

z

Adv

anta

ges

expe

rienc

e fr

om w

irele

ss W

AN

an

d m

obile

pho

nes

can

be u

sed

cove

rage

of l

arge

r ar

eas

poss

ible

(ra

dio

can

pene

trat

e w

alls

, fur

nitu

re e

tc.)

Dis

adva

ntag

esve

ry li

mite

d lic

ense

free

fr

eque

ncy

band

s sh

ield

ing

mor

e di

fficu

lt,

inte

rfer

ence

with

oth

er e

lect

rical

de

vice

s

Exa

mpl

e Wav

eLA

N, H

IPE

RLA

N,

Blu

etoo

th

Page 5: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

5

Com

paris

on: i

nfra

stru

ctur

e vs

. ad-

hoc

netw

orks

infr

astr

uctu

rene

twor

k

ad-h

oc n

etw

ork

AP

AP

AP

wire

dne

twor

k

AP

: Acc

ess

Poi

nt

Page 6: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

6

802.

11 -

Arc

hite

ctur

e of

an

infr

astr

uctu

re n

etw

ork

Sta

tion

(ST

A)

term

inal

with

acc

ess

mec

hani

sms

to th

e w

irele

ss m

ediu

m a

nd r

adio

co

ntac

t to

the

acce

ss p

oint

Bas

ic S

ervi

ce S

et (

BS

S)

grou

p of

sta

tions

usi

ng th

e sa

me

radi

o fr

eque

ncy

Acc

ess

Poi

ntst

atio

n in

tegr

ated

into

the

wire

less

LA

N a

nd th

e di

strib

utio

n sy

stem

Por

tal brid

ge to

oth

er (

wire

d) n

etw

orks

Dis

trib

utio

n S

yste

min

terc

onne

ctio

n ne

twor

k to

form

on

e lo

gica

l net

wor

k (E

ES

: E

xten

ded

Ser

vice

Set

) ba

sed

on s

ever

al B

SS

Dis

trib

utio

n S

yste

m

Por

tal

802.

x LA

N

Acc

ess

Poi

nt

802.

11 L

AN

BS

S2

802.

11 L

AN

BS

S1

Acc

ess

Poi

nt

ST

A1

ST

A2

ST

A3

ES

S

Page 7: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

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schi

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de/

MC

SS

027.

7

802.

11 -

Arc

hite

ctur

e of

an

ad-h

oc n

etw

ork

Dire

ct c

omm

unic

atio

n w

ithin

a li

mite

d ra

nge

Sta

tion

(ST

A):

term

inal

with

acc

ess

mec

hani

sms

to

the

wire

less

med

ium

Inde

pend

ent B

asic

Ser

vice

Set

(I

BS

S):

grou

p of

sta

tions

usi

ng th

e sa

me

radi

o fr

eque

ncy

802.

11 L

AN

IBS

S2

802.

11 L

AN

IBS

S1

ST

A1

ST

A4

ST

A5

ST

A2

ST

A3

Page 8: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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ng. J

oche

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ttp://

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de/

MC

SS

027.

8

IEE

E s

tand

ard

802.

11

mob

ile te

rmin

al

acce

ss p

oint

fixed

term

inal

appl

icat

ion

TC

P

802.

11 P

HY

802.

11 M

AC

IP

802.

3 M

AC

802.

3 P

HY

appl

icat

ion

TC

P

802.

3 P

HY

802.

3 M

AC

IP

802.

11 M

AC

802.

11 P

HYLL

C

infr

astr

uctu

rene

twor

k

LLC

LLC

Page 9: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

9

802.

11 -

Laye

rs a

nd fu

nctio

ns

PLC

P P

hysi

calL

ayer

Con

verg

ence

Pro

toco

l

clea

r ch

anne

l ass

essm

ent s

igna

l (c

arrie

r se

nse)

PM

D P

hysi

calM

ediu

m D

epen

dent

mod

ulat

ion,

cod

ing

PH

Y M

anag

emen

tch

anne

l sel

ectio

n, M

IB

Sta

tion

Man

agem

ent

coor

dina

tion

of a

ll m

anag

emen

t fu

nctio

ns

PM

D

PLC

P

MA

C

LLC

MA

C M

anag

emen

t

PH

Y M

anag

emen

t

MA

Cac

cess

mec

hani

sms,

frag

men

tatio

n,

encr

yptio

n

MA

C M

anag

emen

tsy

nchr

oniz

atio

n, r

oam

ing,

MIB

, po

wer

man

agem

ent

PHYDLC

Station Management

Page 10: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

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schi

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de/

MC

SS

027.

10

802.

11 -

Phy

sica

l lay

er

3 ve

rsio

ns: 2

rad

io (

typ.

2.4

GH

z), 1

IRda

ta r

ates

1 o

r 2

Mbi

t/s

FH

SS

(F

requ

ency

Hop

ping

Spr

ead

Spe

ctru

m)

spre

adin

g, d

espr

eadi

ng, s

igna

l str

engt

h, ty

p. 1

Mbi

t/s

min

. 2.5

freq

uenc

y ho

ps/s

(U

SA

), tw

o-le

vel G

FS

K m

odul

atio

n

DS

SS

(D

irect

Seq

uenc

e S

prea

d S

pect

rum

)D

BP

SK

mod

ulat

ion

for

1 M

bit/s

(D

iffer

entia

l Bin

ary

Pha

se S

hift

Key

ing)

, D

QP

SK

for

2 M

bit/s

(D

iffer

entia

l Qua

drat

ure

PS

K)

prea

mbl

e an

d he

ader

of a

fram

e is

alw

ays

tran

smitt

ed w

ith 1

Mbi

t/s, r

est

of tr

ansm

issi

on 1

or

2 M

bit/s

chip

ping

seq

uenc

e: +

1, -

1, +

1, +

1, -

1, +

1, +

1, +

1, -

1, -

1, -

1 (B

arke

r co

de)

max

. rad

iate

d po

wer

1 W

(U

SA

), 1

00 m

W (

EU

), m

in. 1

mW

Infr

ared

850-

950

nm, d

iffus

e lig

ht, t

yp. 1

0 m

ran

geca

rrie

r de

tect

ion,

ene

rgy

dete

ctio

n, s

ynch

oniz

atio

n

Page 11: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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MC

SS

027.

11

FH

SS

PH

Y p

acke

t for

mat

sync

hron

izat

ion

SF

DP

LWP

SF

HE

Cpa

yloa

d

PLC

P p

ream

ble

PLC

P h

eade

r

8016

124

16va

riabl

ebi

ts

Syn

chro

niza

tion

sync

h w

ith 0

1010

1...

patte

rn

SF

D (

Sta

rt F

ram

e D

elim

iter)

0000

1100

1011

1101

sta

rt p

atte

rn

PLW

(P

LCP

_PD

U L

engt

h W

ord)

leng

th o

f pay

load

incl

. 32

bit C

RC

of p

aylo

ad, P

LW <

409

6

PS

F (

PLC

P S

igna

ling

Fie

ld)

data

of p

aylo

ad (

1 or

2 M

bit/s

)

HE

C (

Hea

der

Err

or C

heck

)C

RC

with

x16

+x1

2 +x5

+1

Page 12: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

12

DS

SS

PH

Y p

acke

t for

mat

sync

hron

izat

ion

SF

Dsi

gnal

serv

ice

HE

Cpa

yloa

d

PLC

P p

ream

ble

PLC

P h

eade

r

128

168

816

varia

ble

bits

leng

th

16

Syn

chro

niza

tion

sync

h., g

ain

setti

ng, e

nerg

y de

tect

ion,

freq

uenc

y of

fset

com

pens

atio

n

SF

D (

Sta

rt F

ram

e D

elim

iter)

1111

0011

1010

0000

Sig

nal da

ta r

ate

of th

e pa

yloa

d (0

A: 1

Mbi

t/s D

BP

SK

; 14:

2 M

bit/s

DQ

PS

K)

Ser

vice

Leng

thfu

ture

use

, 00:

802

.11

com

plia

nt

leng

th o

f the

pay

load

HE

C (

Hea

der

Err

or C

heck

)pr

otec

tion

of s

igna

l, se

rvic

e an

d le

ngth

, x16

+x1

2 +x5

+1

Page 13: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

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027.

13

802.

11 -

MA

C la

yer

I -D

FW

MA

C

Tra

ffic

serv

ices

Asy

nchr

onou

s D

ata

Ser

vice

(m

anda

tory

)ex

chan

ge o

f dat

a pa

cket

s ba

sed

on “

best

-effo

rt”

supp

ort o

f bro

adca

st a

nd m

ultic

ast

Tim

e-B

ound

ed S

ervi

ce (

optio

nal)

impl

emen

ted

usin

g P

CF

(P

oint

Coo

rdin

atio

n F

unct

ion)

Acc

ess

met

hods

DF

WM

AC

-DC

F C

SM

A/C

A (

man

dato

ry)

colli

sion

avo

idan

ce v

ia r

ando

miz

ed „

back

-off“

mec

hani

smm

inim

um d

ista

nce

betw

een

cons

ecut

ive

pack

ets

AC

K p

acke

t for

ack

now

ledg

emen

ts (

not f

or b

road

cast

s)

DF

WM

AC

-DC

F w

/ RT

S/C

TS

(op

tiona

l)D

istr

ibut

ed F

ound

atio

n W

irele

ss M

AC

avoi

ds h

idde

n te

rmin

al p

robl

em

DF

WM

AC

-P

CF

(op

tiona

l)ac

cess

poi

nt p

olls

term

inal

s ac

cord

ing

to a

list

Page 14: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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14

802.

11 -

MA

C la

yer

II

Prio

ritie

s defin

ed th

roug

h di

ffere

nt in

ter

fram

e sp

aces

no g

uara

ntee

d, h

ard

prio

ritie

sS

IFS

(S

hort

Inte

r F

ram

e S

paci

ng)

high

est p

riorit

y, fo

r A

CK

, CT

S, p

ollin

g re

spon

se

PIF

S (

PC

F IF

S)

med

ium

prio

rity,

for

time-

boun

ded

serv

ice

usin

g P

CF

DIF

S (

DC

F, D

istr

ibut

ed C

oord

inat

ion

Fun

ctio

n IF

S)

low

est p

riorit

y, fo

r as

ynch

rono

us d

ata

serv

ice

t

med

ium

busy

SIF

SP

IFS

DIF

SD

IFS

next

fram

eco

nten

tion

dire

ctac

cess

ifm

ediu

mis

free

≥D

IFS

Page 15: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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027.

15

t

med

ium

busy

DIF

SD

IFS

next

fram

e

cont

entio

nw

indo

w(r

ando

miz

edba

ck-o

ffm

echa

nism

)

802.

11 -

CS

MA

/CA

acc

ess

met

hod

I

stat

ion

read

y to

sen

d st

arts

sen

sing

the

med

ium

(C

arrie

r S

ense

ba

sed

on C

CA

, Cle

ar C

hann

el A

sses

smen

t)if

the

med

ium

is fr

ee fo

r th

e du

ratio

n of

an

Inte

r-F

ram

e S

pace

(IF

S),

th

e st

atio

n ca

n st

art s

endi

ng (

IFS

dep

ends

on

serv

ice

type

)if

the

med

ium

is b

usy,

the

stat

ion

has

to w

ait f

or a

free

IFS

, the

n th

e st

atio

n m

ust a

dditi

onal

ly w

ait a

ran

dom

bac

k-of

f tim

e (c

ollis

ion

avoi

danc

e, m

ultip

le o

f slo

t-tim

e)

if an

othe

r st

atio

n oc

cupi

es th

e m

ediu

m d

urin

g th

e ba

ck-o

ff tim

e of

th

e st

atio

n, th

e ba

ck-o

ff tim

er s

tops

(fa

irnes

s)slot

time

dire

ctac

cess

ifm

ediu

mis

free

≥D

IFS

Page 16: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

16

802.

11 -

com

petin

gst

atio

ns-

sim

ple

vers

ion

t

busy

boe

stat

ion 1

stat

ion 2

stat

ion 3

stat

ion 4

stat

ion 5

pack

et a

rriv

alat

MA

C

DIF

Sbo

e

boe

boe

busy

elap

sed

back

off t

ime

bor

resi

dual

bac

koff

time

busy

med

ium

not i

dle

(fra

me,

ack

etc.

)

borbo

r

DIF

S

boe

boe

boe

bor

DIF

S

busy

busy

DIF

Sbo

ebu

sy

boe

boe

bor

bor

Page 17: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

17

802.

11 -

CS

MA

/CA

acc

ess

met

hod

II

Sen

ding

uni

cast

pac

kets

stat

ion

has

to w

ait f

or D

IFS

bef

ore

send

ing

data

rece

iver

s ac

know

ledg

e at

onc

e (a

fter

wai

ting

for

SIF

S)

if th

e pa

cket

was

re

ceiv

ed c

orre

ctly

(C

RC

)au

tom

atic

ret

rans

mis

sion

of d

ata

pack

ets

in c

ase

of tr

ansm

issi

oner

rors

t

SIF

S

DIF

S

data

AC

K

wai

ting

time

othe

rst

atio

ns

rece

iver

send

erda

ta

DIF

S

cont

entio

n

Page 18: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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MC

SS

027.

18

802.

11 -

DF

WM

AC

Sen

ding

uni

cast

pac

kets

stat

ion

can

send

RT

S w

ith r

eser

vatio

n pa

ram

eter

afte

r w

aitin

g fo

r D

IFS

(r

eser

vatio

n de

term

ines

am

ount

of t

ime

the

data

pac

ket n

eeds

the

med

ium

)

ackn

owle

dgem

ent v

ia C

TS

afte

r S

IFS

by

rece

iver

(if

read

y to

rec

eive

)se

nder

can

now

sen

d da

ta a

t onc

e, a

ckno

wle

dgem

ent v

ia A

CK

othe

r st

atio

ns s

tore

med

ium

res

erva

tions

dis

trib

uted

via

RT

S a

ndC

TS

t

SIF

S

DIF

S

data

AC

K

defe

rac

cess

othe

rst

atio

ns

rece

iver

send

erda

ta

DIF

S

cont

entio

n

RT

S

CT

SS

IFS

SIF

S

NA

V (

RT

S)

NA

V (

CT

S)

Page 19: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ttp://

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ller.

de/

MC

SS

027.

19

Fra

gmen

tatio

n

t

SIF

S

DIF

S

data

AC

K1

othe

rst

atio

ns

rece

iver

send

erfr

ag1

DIF

S

cont

entio

n

RT

S

CT

SS

IFS

SIF

S

NA

V (

RT

S)

NA

V (

CT

S)

NA

V (

frag

1)N

AV

(A

CK

1)

SIF

SA

CK

2

frag

2

SIF

S

Page 20: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

20

DF

WM

AC

-PC

F I

PIF

S

stat

ions

‘N

AV

wire

less

stat

ions

poin

t co

ordi

nato

r

D1

U1

SIF

S

NA

V

SIF

SD

2

U2

SIF

S

SIF

S

Sup

erF

ram

et 0

med

ium

busy

t 1

Page 21: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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MC

SS

027.

21

DF

WM

AC

-PC

F II

tst

atio

ns‘

NA

V

wire

less

stat

ions

poin

t co

ordi

nato

r

D3

NA

V

PIF

SD

4

U4

SIF

S

SIF

SC

Fen

d

cont

entio

npe

riod

cont

entio

nfr

eepe

riod

t 2t 3

t 4

Page 22: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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22

802.

11 -

Fra

me

form

at

Typ

esco

ntro

l fra

mes

, man

agem

ent f

ram

es, d

ata

fram

es

Seq

uenc

e nu

mbe

rsim

port

ant a

gain

st d

uplic

ated

fram

es d

ue to

lost

AC

Ks

Add

ress

esre

ceiv

er, t

rans

mitt

er (

phys

ical

), B

SS

iden

tifie

r, s

ende

r (lo

gica

l)

Mis

cella

neou

sse

ndin

g tim

e, c

heck

sum

, fra

me

cont

rol,

data

Fra

me

Con

trol

Dur

atio

n/ID

Add

ress

1A

ddre

ss2

Add

ress

3S

eque

nce

Con

trol

Add

ress

4D

ata

CR

C

22

66

66

24

0-23

12by

tes P

roto

col

vers

ion

Typ

eS

ubty

peT

oD

SM

ore

Fra

gR

etry

Pow

erM

gmt

Mor

eD

ata

WE

P

22

41

Fro

mD

S

1

Ord

er

bits

11

11

11

Page 23: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ller.

de/

MC

SS

027.

23

MA

C a

ddre

ss fo

rmat

scen

ario

to D

Sfr

om

DS

add

ress

1ad

dre

ss 2

add

ress

3ad

dre

ss 4

ad-h

oc n

etw

ork

00

DA

SA

BS

SID

-in

fras

truc

ture

netw

ork,

from

AP

01

DA

BS

SID

SA

-

infr

astr

uctu

rene

twor

k, to

AP

10

BS

SID

SA

DA

-

infr

astr

uctu

rene

twor

k, w

ithin

DS

11

RA

TA

DA

SA

DS

: Dis

trib

utio

n S

yste

mA

P: A

cces

s P

oint

DA

: Des

tinat

ion

Add

ress

SA

: Sou

rce

Add

ress

BS

SID

: Bas

ic S

ervi

ce S

et Id

entif

ier

RA

: Rec

eive

r A

ddre

ssT

A: T

rans

mitt

er A

ddre

ss

Page 24: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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de/

MC

SS

027.

24

Spe

cial

Fra

mes

: AC

K, R

TS

, CT

S

Ack

now

ledg

emen

t

Req

uest

To

Sen

d

Cle

arT

o S

end

Fra

me

Con

trol

Dur

atio

nR

ecei

ver

Add

ress

Tra

nsm

itter

Add

ress

CR

C

22

66

4by

tes

Fra

me

Con

trol

Dur

atio

nR

ecei

ver

Add

ress

CR

C

22

64

byte

sFra

me

Con

trol

Dur

atio

nR

ecei

ver

Add

ress

CR

C

22

64

byte

s

AC

K

RT

S

CT

S

Page 25: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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MC

SS

027.

25

802.

11 -

MA

C m

anag

emen

t

Syn

chro

niza

tion

try

to fi

nd a

LA

N, t

ry to

sta

y w

ithin

a L

AN

timer

etc

.

Pow

er m

anag

emen

tsl

eep-

mod

e w

ithou

t mis

sing

a m

essa

gepe

riodi

c sl

eep,

fram

e bu

fferin

g, tr

affic

mea

sure

men

ts

Ass

ocia

tion/

Rea

ssoc

iatio

nin

tegr

atio

n in

to a

LA

Nro

amin

g, i.

e. c

hang

e ne

twor

ks b

y ch

angi

ng a

cces

s po

ints

scan

ning

, i.e

. act

ive

sear

ch fo

r a

netw

ork

MIB

-M

anag

emen

t Inf

orm

atio

n B

ase

man

agin

g, r

ead,

writ

e

Page 26: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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de/

MC

SS

027.

26

Syn

chro

niza

tion

usin

ga

Bea

con

(infr

astr

uctu

re)

beac

onin

terv

al

tm

ediu

m

acce

sspo

int

busy

B

busy

busy

busy

BB

B

valu

eof

the

times

tam

pB

beac

onfr

ame

Page 27: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ller.

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MC

SS

027.

27

Syn

chro

niza

tion

usin

ga

Bea

con

(ad-

hoc)

tm

ediu

m

stat

ion 1

busy

B1

beac

onin

terv

al busy

busy

busy

B1

valu

eof

the

times

tam

pB

beac

onfr

ame

stat

ion 2

B2

B2

rand

omde

lay

Page 28: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

28

Pow

er m

anag

emen

t

Idea

: sw

itch

the

tran

scei

ver

off i

f not

nee

ded

Sta

tes

of a

sta

tion:

sle

ep a

nd a

wak

eT

imin

g S

ynch

roni

zatio

n F

unct

ion

(TS

F)

stat

ions

wak

e up

at t

he s

ame

time

Infr

astr

uctu

reT

raffi

c In

dica

tion

Map

(T

IM)

list o

f uni

cast

rec

eive

rs tr

ansm

itted

by

AP

Del

iver

y T

raffi

c In

dica

tion

Map

(D

TIM

)lis

t of b

road

cast

/mul

ticas

t rec

eive

rs tr

ansm

itted

by

AP

Ad-

hoc A

d-ho

c T

raffi

c In

dica

tion

Map

(A

TIM

)an

noun

cem

ent o

f rec

eive

rs b

y st

atio

ns b

uffe

ring

fram

es

mor

e co

mpl

icat

ed -

no c

entr

al A

P

colli

sion

of A

TIM

spo

ssib

le (

scal

abili

ty?)

Page 29: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

29

Pow

er s

avin

gw

ithw

ake-

uppa

ttern

s(in

fras

truc

ture

)

TIM

inte

rval

t

med

ium

acce

sspo

int

busy

D

busy

busy

busy

TT

D

TT

IMD

DT

IM

DT

IM in

terv

al

BB

Bbr

oadc

ast/m

ultic

ast

stat

ion

awak

e

pP

S p

oll

p

d

d

dda

tatr

ansm

issi

onto

/from

the

stat

ion

Page 30: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

30

Pow

er s

avin

gw

ithw

ake-

uppa

ttern

s(a

d-ho

c)

awak

e

Atr

ansm

it A

TIM

Dtr

ansm

it da

ta

t

stat

ion 1

B1

B1

Bbe

acon

fram

e

stat

ion 2

B2

B2

rand

om d

elay

A

a

D

d

AT

IMw

indo

wbe

acon

inte

rval

aac

know

ledg

e A

TIM

dac

know

ledg

e da

ta

Page 31: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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027.

31

802.

11 -

Roa

min

g

No

or b

ad c

onne

ctio

n? T

hen

perf

orm

:S

cann

ing

scan

the

envi

ronm

ent,

i.e.,

liste

n in

to th

e m

ediu

m fo

r be

acon

sig

nals

or

send

pro

bes

into

the

med

ium

and

wai

t for

an

answ

er

Rea

ssoc

iatio

nR

eque

stst

atio

n se

nds

a re

ques

t to

one

or s

ever

al A

P(s

)

Rea

ssoc

iatio

nR

espo

nse

succ

ess:

AP

has

ans

wer

ed, s

tatio

n ca

n no

w p

artic

ipat

e

failu

re: c

ontin

ue s

cann

ing

AP

acc

epts

Rea

ssoc

iatio

nR

eque

stsi

gnal

the

new

sta

tion

to th

e di

strib

utio

n sy

stem

the

dist

ribut

ion

syst

em u

pdat

es it

s da

ta b

ase

(i.e.

, loc

atio

n in

form

atio

n)ty

pica

lly, t

he d

istr

ibut

ion

syst

em n

ow in

form

s th

e ol

d A

P s

o it

can

rele

ase

reso

urce

s

Page 32: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

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027.

32

WLA

N: I

EE

E 8

02.1

1b

Dat

a ra

te 1, 2

, 5.5

, 11

Mbi

t/s, d

epen

ding

on

SN

R

Use

r da

ta r

ate

max

. app

rox.

6

Mbi

t/s

Tra

nsm

issi

on r

ange

300m

out

door

, 30m

indo

or

Max

. dat

a ra

te ~

10m

indo

or

Fre

quen

cy Fre

e 2.

4 G

Hz

ISM

-ban

d

Sec

urity

Lim

ited,

WE

P in

secu

re, S

SID

Cos

t10

0€ a

dapt

er, 2

50€ b

ase

stat

ion,

dr

oppi

ng

Ava

ilabi

lity

Man

y pr

oduc

ts, m

any

vend

ors

Con

nect

ion

set-

up ti

me

Con

nect

ionl

ess/

alw

ays

on

Qua

lity

of S

ervi

ceT

yp. B

est e

ffort

, no

guar

ante

es

(unl

ess

polli

ng is

use

d, li

mite

d su

ppor

t in

prod

ucts

)

Man

agea

bilit

yLi

mite

d (n

o au

tom

ated

key

di

strib

utio

n, s

ym. E

ncry

ptio

n)

Spe

cial

Adv

anta

ges/

Dis

adva

ntag

esA

dvan

tage

: man

y in

stal

led

syst

ems,

lo

t of e

xper

ienc

e, a

vaila

ble

wor

ldw

ide,

free

ISM

-ban

d, m

any

vend

ors,

inte

grat

ed in

lapt

ops,

si

mpl

e sy

stem

Dis

adva

ntag

e: h

eavy

inte

rfer

ence

on

ISM

-ban

d, n

o se

rvic

e gu

aran

tees

, slo

w r

elat

ive

spee

d on

ly

Page 33: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

33

IEE

E 8

02.1

1b –

PH

Y fr

ame

form

ats

sync

hron

izat

ion

SF

Dsi

gnal

serv

ice

HE

Cpa

yloa

d

PLC

P p

ream

ble

PLC

P h

eade

r

128

168

816

varia

ble

bits

leng

th

16

192

µs

at 1

Mbi

t/s D

BP

SK

1, 2

, 5.5

or

11 M

bit/s

shor

tsyn

ch.

SF

Dsi

gnal

serv

ice

HE

Cpa

yloa

d

PLC

P p

ream

ble

(1 M

bit/s

, DB

PS

K)

PLC

P h

eade

r(2

Mbi

t/s, D

QP

SK

)

5616

88

16va

riabl

ebi

ts

leng

th

16

96 µ

s2,

5.5

or

11 M

bit/s

Long

PLC

P P

PD

U fo

rmat

Sho

rt P

LCP

PP

DU

form

at(o

ptio

nal)

Page 34: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

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schi

ller.

de/

MC

SS

027.

34

Cha

nnel

sele

ctio

n(n

on-o

verla

ppin

g)

2400

[MH

z]24

1224

83.5

2442

2472

chan

nel1

chan

nel7

chan

nel1

3

Eur

ope

(ET

SI)

US

(F

CC

)/C

anad

a(I

C)

2400

[MH

z]24

1224

83.5

2437

2462

chan

nel1

chan

nel6

chan

nel1

1

22 M

Hz

22 M

Hz

Page 35: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ttp://

ww

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chen

schi

ller.

de/

MC

SS

027.

35

WLA

N: I

EE

E 8

02.1

1a

Dat

a ra

te 6, 9

, 12,

18,

24,

36,

48,

54

Mbi

t/s,

depe

ndin

g on

SN

RU

ser

thro

ughp

ut (

1500

byt

e pa

cket

s): 5

.3

(6),

18

(24)

, 24

(36)

, 32

(54)

6,

12,

24

Mbi

t/s m

anda

tory

Tra

nsm

issi

on r

ange

100m

out

door

, 10m

indo

orE

.g.,

54 M

bit/s

up

to 5

m, 4

8 up

to 1

2 m

, 36

up

to 2

5 m

, 24

up to

30m

, 18

up to

40

m, 1

2 up

to 6

0 m

Fre

quen

cy Fre

e 5.

15-5

.25,

5.2

5-5.

35, 5

.725

-5.8

25

GH

z IS

M-b

and

Sec

urity

Lim

ited,

WE

P in

secu

re, S

SID

Cos

t28

0€ a

dapt

er, 5

00€ b

ase

stat

ion

Ava

ilabi

lity

Som

e pr

oduc

ts, s

ome

vend

ors

Con

nect

ion

set-

up ti

me

Con

nect

ionl

ess/

alw

ays

on

Qua

lity

of S

ervi

ceT

yp. b

est e

ffort

, no

guar

ante

es (

sam

e as

al

l 802

.11

prod

ucts

)

Man

agea

bilit

yLi

mite

d (n

o au

tom

ated

key

dis

trib

utio

n,

sym

. Enc

rypt

ion)

Spe

cial

Adv

anta

ges/

Dis

adva

ntag

esA

dvan

tage

: fits

into

802

.x s

tand

ards

, fre

e IS

M-b

and,

ava

ilabl

e, s

impl

e sy

stem

, us

es le

ss c

row

ded

5 G

Hz

band

Dis

adva

ntag

e: s

tron

ger

shad

ing

due

to

high

er fr

eque

ncy,

no

QoS

Page 36: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

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oche

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chen

schi

ller.

de/

MC

SS

027.

36

IEE

E 8

02.1

1a –

PH

Y fr

ame

form

at

rate

serv

ice

payl

oad

varia

ble

bits

6 M

bit/s

PLC

P p

ream

ble

sign

alda

ta

sym

bols

121

varia

ble

rese

rved

leng

thta

ilpa

rity

tail

pad

616

61

121

4va

riabl

e

6, 9

, 12,

18,

24,

36,

48,

54

Mbi

t/s

PLC

P h

eade

r

Page 37: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

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ttp://

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chen

schi

ller.

de/

MC

SS

027.

37

Ope

ratin

gch

anne

lsfo

r80

2.11

a / U

S U

-NII

5150

[MH

z]51

8053

5052

00

3644

16.6

MH

z

cent

er fr

eque

ncy

=

5000

+ 5

*cha

nnel

num

ber

[MH

z]

chan

nel

4048

5256

6064

149

153

157

161

5220

5240

5260

5280

5300

5320

5725

[MH

z]57

4558

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65

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MH

z

chan

nel

5785

5805

Page 38: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

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oche

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chen

schi

ller.

de/

MC

SS

027.

38

OF

DM

in IE

EE

802

.11a

(an

d H

iper

LAN

2)

OF

DM

with

52

used

sub

carr

iers

(64

in to

tal)

48 d

ata

+ 4

pilo

t(p

lus

12 v

irtua

l sub

carr

iers

)31

2.5

kHz

spac

ing

subc

arrie

rnu

mbe

r1

721

26-2

6-2

1-7

-1

chan

nelc

ente

rfr

eque

ncy

312.

5 kH

zpi

lot

Page 39: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

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ttp://

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schi

ller.

de/

MC

SS

027.

39

WLA

N: I

EE

E 8

02.1

1 –

futu

re d

evel

opm

ents

(08

/200

2)

802.

11d:

Reg

ulat

ory

Dom

ain

Upd

ate

–co

mpl

eted

802.

11e:

MA

C E

nhan

cem

ents

–Q

oS –

ongo

ing

Enh

ance

the

curr

ent 8

02.1

1 M

AC

to e

xpan

d su

ppor

t for

app

licat

ions

with

Q

ualit

y of

Ser

vice

req

uire

men

ts, a

nd in

the

capa

bilit

ies

and

effic

ienc

y of

the

prot

ocol

.

802.

11f:

Inte

r-A

cces

s P

oint

Pro

toco

l –on

goin

gE

stab

lish

an In

ter-

Acc

ess

Poi

nt P

roto

col f

or d

ata

exch

ange

via

the

dist

ribut

ion

syst

em.

802.

11g:

Dat

a R

ates

> 2

0 M

bit/s

at 2

.4 G

Hz;

54

Mbi

t/s, O

FD

M–

ongo

ing

802.

11h:

Spe

ctru

m M

anag

ed 8

02.1

1a (

DC

S, T

PC

) –

ongo

ing

802.

11i:

Enh

ance

d S

ecur

ity M

echa

nism

s –

ongo

ing

Enh

ance

the

curr

ent 8

02.1

1 M

AC

to p

rovi

de im

prov

emen

ts in

sec

urity

.

Stu

dy G

roup

s5

GH

z (h

arm

oniz

atio

n E

TS

I/IE

EE

) –

clos

ed

Rad

io R

esou

rce

Mea

sure

men

ts –

star

ted

Hig

h T

hrou

ghpu

t –st

arte

d

Page 40: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

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r.-I

ng. J

oche

nS

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ttp://

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schi

ller.

de/

MC

SS

027.

40

ET

SI -

HIP

ER

LAN

ET

SI s

tand

ard

Eur

opea

n st

anda

rd, c

f. G

SM

, DE

CT

, ...

Enh

ance

men

t of l

ocal

Net

wor

ks a

nd in

terw

orki

ngw

ith fi

xed

netw

orks

inte

grat

ion

of ti

me-

sens

itive

ser

vice

s fr

om th

e ea

rly b

egin

ning

HIP

ER

LAN

fam

ilyon

e st

anda

rd c

anno

t sat

isfy

all

requ

irem

ents

rang

e, b

andw

idth

, QoS

sup

port

com

mer

cial

con

stra

ints

HIP

ER

LAN

1 s

tand

ardi

zed

sinc

e 19

96 –

no p

rodu

cts!

phys

ical

laye

r

chan

nela

cces

sco

ntro

llay

er

med

ium

acce

ssco

ntro

llay

er

phys

ical

laye

r

data

link

laye

r

HIP

ER

LA

N la

yers

OS

I lay

ers

netw

ork

laye

r

high

erla

yers

phys

ical

laye

r

med

ium

acce

ssco

ntro

llay

er

logi

call

ink

cont

roll

ayer

IEE

E 8

02.x

laye

rs

Page 41: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

41

Ove

rvie

w: o

rigin

al H

IPE

RLA

N p

roto

col f

amily

HIP

ER

LA

N 1

HIP

ER

LA

N 2

HIP

ER

LA

N 3

HIP

ER

LA

N 4

App

licat

ion

wire

less

LA

Nac

cess

to A

TM

fixed

net

wor

ksw

irele

ss lo

cal

loop

poin

t-to

-poi

ntw

irele

ss A

TM

conn

ectio

nsF

requ

ency

5.1-

5.3G

Hz

17.2

-17.

3GH

z

Top

olog

yde

cent

raliz

ed a

d-ho

c/in

fras

truc

ture

cellu

lar,

cent

raliz

edpo

int-

to-

mul

tipoi

ntpo

int-

to-p

oint

Ant

enna

omni

-dire

ctio

nal

dire

ctio

nal

Ran

ge50

m50

-100

m50

00 m

150

mQ

oSst

atis

tical

AT

M tr

affic

cla

sses

(V

BR

, CB

R, A

BR

, UB

R)

Mob

ility

<10

m/s

stat

iona

ryIn

terf

ace

conv

entio

nal L

AN

AT

M n

etw

orks

Dat

a ra

te23

.5 M

bit/s

>20

Mbi

t/s15

5 M

bit/s

Pow

erco

nser

vatio

nye

sno

t nec

essa

ry

HIP

ER

LAN

1 n

ever

reac

hed

prod

ucts

tatu

s,

the

othe

rst

anda

rds

have

been

rena

med

/mod

fied

!

Page 42: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

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r.-I

ng. J

oche

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chill

er, h

ttp://

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chen

schi

ller.

de/

MC

SS

027.

42

HIP

ER

LAN

1 -

Cha

ract

eris

tics

Dat

a tr

ansm

issi

onpo

int-

to-p

oint

, poi

nt-t

o-m

ultip

oint

, con

nect

ionl

ess

23.5

Mbi

t/s, 1

W p

ower

, 238

3 by

te m

ax. p

acke

t siz

e

Ser

vice

s asyn

chro

nous

and

tim

e-bo

unde

d se

rvic

es w

ith h

iera

rchi

cal p

riorit

ies

com

patib

le w

ith IS

O M

AC

Top

olog

yin

fras

truc

ture

or

ad-h

oc n

etw

orks

tran

smis

sion

ran

ge c

an b

e la

rger

then

cov

erag

e of

a s

ingl

e no

de

(„fo

rwar

ding

“ in

tegr

ated

in m

obile

term

inal

s)

Fur

ther

mec

hani

sms

pow

er s

avin

g, e

ncry

ptio

n, c

heck

sum

s

Page 43: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

43

HIP

ER

LAN

1 -

Phy

sica

l lay

er

Sco

pem

odul

atio

n, d

emod

ulat

ion,

bit

and

fram

e sy

nchr

oniz

atio

n

forw

ard

erro

r co

rrec

tion

mec

hani

sms

mea

sure

men

ts o

f sig

nal s

tren

gth

chan

nel s

ensi

ng

Cha

nnel

s3

man

dato

ry a

nd 2

opt

iona

l cha

nnel

s (w

ith th

eir

carr

ier

freq

uenc

ies)

man

dato

rych

anne

l 0: 5

.176

4680

GH

zch

anne

l 1: 5

.199

9974

GH

z

chan

nel 2

: 5.2

2352

68 G

Hz

optio

nal

chan

nel 3

: 5.2

4705

62 G

Hz

chan

nel 4

: 5.2

7058

56 G

Hz

Page 44: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

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chill

er, h

ttp://

ww

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chen

schi

ller.

de/

MC

SS

027.

44

HIP

ER

LAN

1 -

Phy

sica

l lay

er fr

ames

Mai

ntai

ning

a h

igh

data

-rat

e (2

3.5

Mbi

t/s)

is p

ower

con

sum

ing

-pr

oble

mat

ic fo

r m

obile

term

inal

spa

cket

hea

der

with

low

bit-

rate

com

pris

ing

rece

iver

info

rmat

ion

only

rec

eive

r(s)

add

ress

by

a pa

cket

con

tinue

rec

eivi

ng

Fra

me

stru

ctur

eLB

R (

Low

Bit-

Rat

e) h

eade

r w

ith 1

.4 M

bit/s

450

bit s

ynch

roni

zatio

n

min

imum

1, m

axim

um 4

7 fr

ames

with

496

bit

each

for

high

er v

eloc

ities

of t

he m

obile

term

inal

(>

1.4

m/s

) th

e m

axim

um

num

ber

of fr

ames

has

to b

e re

duce

d

Mod

ulat

ion

GM

SK

for

high

bit-

rate

, FS

K fo

r LB

R h

eade

r

LBR

sync

hron

izat

ion

data

0da

ta1

data

m-1

. . .

HB

R

Page 45: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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r.-I

ng. J

oche

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chill

er, h

ttp://

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chen

schi

ller.

de/

MC

SS

027.

45

HIP

ER

LAN

1 -

CA

C s

ubla

yer

Cha

nnel

Acc

ess

Con

trol

(C

AC

)as

sure

that

term

inal

doe

s no

t acc

ess

forb

idde

n ch

anne

ls

prio

rity

sche

me,

acc

ess

with

EY

-NP

MA

Prio

ritie

s 5 pr

iorit

y le

vels

for

QoS

sup

port

QoS

is m

appe

d on

to a

prio

rity

leve

l with

the

help

of t

he p

acke

t lif

etim

e (s

et b

y an

app

licat

ion)

if

pack

et li

fetim

e =

0 it

mak

es n

o se

nse

to fo

rwar

d th

e pa

cket

to th

e re

ceiv

er a

ny lo

nger

stan

dard

sta

rt v

alue

500

ms,

max

imum

160

00m

sif

a te

rmin

al c

anno

t sen

d th

e pa

cket

due

to it

s cu

rren

t prio

rity,

wai

ting

time

is p

erm

anen

tly s

ubtr

acte

d fr

om li

fetim

e ba

sed

on p

acke

t life

time,

wai

ting

time

in a

sen

der

and

num

ber

ofho

ps to

th

e re

ceiv

er, t

he p

acke

t is

assi

gned

to o

ne o

ut o

f fiv

e pr

iorit

ies

the

prio

rity

of w

aitin

g pa

cket

s, th

eref

ore,

ris

es a

utom

atic

ally

Page 46: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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chill

er, h

ttp://

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schi

ller.

de/

MC

SS

027.

46

prio

ritiz

atio

n

HIP

ER

LAN

1 -

EY

-NP

MA

I

EY

-NP

MA

(E

limin

atio

n Y

ield

Non

-pre

empt

ive

Prio

rity

Mul

tiple

Acc

ess)

3 ph

ases

: prio

rity

reso

lutio

n, c

onte

ntio

n re

solu

tion,

tran

smis

sion

findi

ng th

e hi

ghes

t prio

rity

ever

y pr

iorit

y co

rres

pond

s to

a ti

me-

slot

to s

end

in th

e fir

st p

hase

, the

hi

gher

the

prio

rity

the

earli

er th

e tim

e-sl

ot to

sen

dhi

gher

prio

ritie

s ca

n no

t be

pree

mpt

ed

if an

ear

lier

time-

slot

for

a hi

gher

prio

rity

rem

ains

em

pty,

sta

tions

with

the

next

low

er p

riorit

y m

ight

sen

daf

ter

this

firs

t pha

se th

e hi

ghes

t cur

rent

prio

rity

has

been

det

erm

ined

cont

entio

ntr

ansm

issi

ontr

ansm

issi

onsynchronization

priority detection

priority assertion

t

user data

elimination burst

elimination survivalverification

yield listening

I YS

I PS

I PA

I ES

I ES

V

Page 47: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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027.

47

HIP

ER

LAN

1 -

EY

-NP

MA

II

Sev

eral

term

inal

s ca

n no

w h

ave

the

sam

e pr

iorit

y an

d w

ish

to s

end

cont

entio

n ph

ase

Elim

inat

ion

Bur

st: a

ll re

mai

ning

term

inal

s se

nd a

bur

st to

elim

inat

e co

nten

ders

(11

1110

1010

0010

0111

0000

0110

0101

10, h

igh

bit-

rate

)

Elim

inat

ion

Sur

viva

l Ver

ifica

tion:

con

tend

ers

now

sen

se th

e ch

anne

l, if

the

chan

nel i

s fr

ee th

ey c

an c

ontin

ue, o

ther

wis

e th

ey h

ave

been

elim

inat

ed

Yie

ld L

iste

ning

: con

tend

ers

agai

n lis

ten

in s

lots

with

a n

onze

ropr

obab

ility

, if

the

term

inal

sen

ses

its s

lot i

dle

it is

free

to tr

ansm

it at

the

end

of th

e co

nten

tion

phas

e th

e im

port

ant p

art i

s no

w to

set

the

para

met

ers

for

burs

t dur

atio

n an

d ch

anne

l sen

sing

(sl

ot-b

ased

, exp

onen

tially

dis

trib

uted

)

data

tran

smis

sion

the

win

ner

can

now

sen

d its

dat

a (h

owev

er, a

sm

all c

hanc

e of

col

lisio

n re

mai

ns)

if th

e ch

anne

l was

idle

for

a lo

nger

tim

e (m

in. f

or a

dur

atio

n of

170

0 bi

t) a

te

rmin

al c

an s

end

at o

nce

with

out u

sing

EY

-NP

MA

sync

hron

izat

ion

usin

g th

e la

st d

ata

tran

smis

sion

Page 48: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

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027.

48

HIP

ER

LAN

1 -

DT

-HC

PD

U/A

K-H

CP

DU

10

10

10

10

01

HI

HD

A

HD

AH

DA

CS

BLI

R =

n

1

BL-

IRC

S

LB

R0

12

34

56

7bi

t

HB

R0

12

34

56

7bi

t

TI

BLI

= n

byte

1

PLI

= m

HID

2 3 -

6

DA

7 -

12

SA

13 -

18

UD

19 -

(52n

-m-4

)

PA

D(5

2n-m

-3)

-(5

2n-4

)

CS

(52n

-3)

-52

n

10

10

10

10

01

HI

AID

AID

AID

CS

LB

R0

12

34

56

7bi

t

Dat

aH

CP

DU

Ack

now

ledg

emen

tHC

PD

U

HI:

HB

R-p

art I

ndic

ator

HD

A: H

ashe

d D

estin

atio

n H

CS

AP

Add

ress

HD

AC

S: H

DA

Che

ckS

umB

LIR

: Blo

ck L

engt

h In

dica

tor

BLI

RC

S: B

LIR

Che

ckS

umT

I: T

ype

Indi

cato

rB

LI: B

lock

Len

gth

Indi

cato

rH

ID: H

IPE

RLA

N ID

entif

ier

DA

: Des

tinat

ion

Add

ress

SA

: Sou

rce

Add

ress

UD

: Use

r D

ata

(1-2

422

byte

)P

AD

: PA

Ddi

ngC

S: C

heck

Sum

AID

: Ack

now

ledg

emen

t ID

entif

ier

AID

S: A

ID C

heck

Sum

Page 49: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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027.

49

HIP

ER

LAN

1 -

MA

C la

yer

Com

patib

le to

ISO

MA

CS

uppo

rts

time-

boun

ded

serv

ices

via

a p

riorit

y sc

hem

eP

acke

t for

war

ding

supp

ort o

f dire

cted

(po

int-

to-p

oint

) fo

rwar

ding

and

bro

adca

st fo

rwar

ding

(if

no p

ath

info

rmat

ion

is a

vaila

ble)

supp

ort o

f QoS

whi

le fo

rwar

ding

Enc

rypt

ion

mec

hani

sms

mec

hani

sms

inte

grat

ed, b

ut w

ithou

t key

man

agem

ent

Pow

er c

onse

rvat

ion

mec

hani

sms

mob

ile te

rmin

als

can

agre

e up

on a

wak

e pa

ttern

s (e

.g.,

perio

dic

wak

e-up

s to

rec

eive

dat

a)ad

ditio

nally

, som

e no

des

in th

e ne

twor

ks m

ust b

e ab

le to

buf

fer

data

for

slee

ping

term

inal

s an

d to

forw

ard

them

at t

he r

ight

tim

e (s

o ca

lled

stor

es)

Page 50: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

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027.

50

HIP

ER

LAN

1 -

DT

-HM

PD

U LI: L

engt

h In

dica

tor

TI:

Typ

e In

dica

tor

RL:

Res

idua

l Life

time

PS

N: S

eque

nce

Num

ber

DA

: Des

tinat

ion

Add

ress

SA

: Sou

rce

Add

ress

AD

A: A

lias

Des

tinat

ion

Add

ress

A

SA

: Alia

s S

ourc

e A

ddre

ssU

P: U

ser

Prio

rity

ML:

MS

DU

Life

time

KID

: Key

Iden

tifie

rIV

: Ini

tializ

atio

n V

ecto

r

UD

: Use

r D

ata,

1–2

383

byte

SC

: San

ity C

heck

(fo

r th

eun

encr

ypte

d P

DU

)

n= 4

0–24

22

01

23

45

67

bit

LI =

n

byte

1 -

2

TI =

1

RL

3 4 -

5

PS

N6

-7

DA

8 -

13

SA

14 -

19

AD

A20

-25

AS

A26

-31

UP

ML

ML

KID

IV

IV

UD

SC

32 33 34 35 -

37

38 -

(n-2

)

(n-1

) -

n

Dat

aH

MP

DU

Page 51: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

51

Info

rmat

ion

base

s

Rou

te In

form

atio

n B

ase

(RIB

) -

how

to r

each

a d

estin

atio

n[d

estin

atio

n, n

ext h

op, d

ista

nce]

Nei

ghbo

r In

form

atio

n B

ase

(NIB

) -

stat

us o

f dire

ct n

eigh

bors

[nei

ghbo

r, s

tatu

s]

Hel

lo In

form

atio

n B

ase

(HIB

) -

stat

us o

f des

tinat

ion

(via

nex

t hop

)[d

estin

atio

n, s

tatu

s, n

ext h

op]

Alia

s In

form

atio

n B

ase

(AIB

) -

addr

ess

of n

odes

out

side

the

net

[orig

inal

MS

AP

add

ress

, alia

s M

SA

P a

ddre

ss]

Sou

rce

Mul

tipoi

nt R

elay

Info

rmat

ion

Bas

e (S

MR

IB)

-cu

rren

t MP

sta

tus

[loca

l mul

tipoi

nt fo

rwar

der,

mul

tipoi

nt r

elay

set

]

Top

olog

y In

form

atio

n B

ase

(TIB

) -

curr

ent H

IPE

RLA

N to

polo

gy[d

estin

atio

n, fo

rwar

der,

seq

uenc

e]

Dup

licat

e D

etec

tion

Info

rmat

ion

Bas

e (D

DIB

) -

rem

ove

dupl

icat

es[s

ourc

e, s

eque

nce]

Page 52: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

52

Ad-

hoc

netw

orks

usi

ng H

IPE

RLA

N 1

neig

hbor

hood

(i.e.

, with

in r

adio

ran

ge)

Info

rmat

ion

Bas

es (

IB):

RIB

: Rou

teN

IB: N

eigh

bor

HIB

: Hel

lo

AIB

: Alia

sS

MR

IB: S

ourc

e M

ultip

oint

Rel

ayT

IB: T

opol

ogy

DD

IB: D

uplic

ate

Det

ectio

n

RIB

NIB

HIB

AIB

SM

RIB

TIB

DD

IB

RIB

NIB

HIB

AIB

SM

RIB

TIB

DD

IB

RIB

NIB

HIB

AIB

SM

RIB

TIB

DD

IB

RIB

NIB

HIB

AIB

DD

IB

RIB

NIB

HIB

AIB

DD

IB

RIB

NIB

HIB

AIB

DD

IB

12

34

5

6

For

war

der

For

war

der

For

war

der

Page 53: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

SS

027.

53

Som

e hi

stor

y: W

hy w

irele

ss A

TM

?

seam

less

con

nect

ion

to w

ired

AT

M, a

inte

grat

ed s

ervi

ces

high

-pe

rfor

man

ce n

etw

ork

supp

ortin

g di

ffere

nt ty

pes

a tr

affic

str

eam

sA

TM

net

wor

ks s

cale

wel

l: pr

ivat

e an

d co

rpor

ate

LAN

s, W

AN

B

-IS

DN

use

s A

TM

as

back

bone

infr

astr

uctu

re a

nd in

tegr

ates

sev

eral

di

ffere

nt s

ervi

ces

in o

ne u

nive

rsal

sys

tem

m

obile

pho

nes

and

mob

ile c

omm

unic

atio

ns h

ave

an e

ver

incr

easi

ng

impo

rtan

ce in

eve

ryda

y lif

ecu

rren

t wire

less

LA

Ns

do n

ot o

ffer

adeq

uate

sup

port

for

mul

timed

ia

data

str

eam

sm

ergi

ng m

obile

com

mun

icat

ion

and

AT

M le

ads

to w

irele

ss A

TM

from

a

tele

com

mun

icat

ion

prov

ider

poi

nt o

f vie

wgo

al: s

eam

less

inte

grat

ion

of m

obili

ty in

to B

-IS

DN

Pro

blem

: ver

y hi

gh c

ompl

exity

of t

he s

yste

m –

neve

r re

ache

d pr

oduc

ts

Page 54: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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027.

54

AT

M -

basi

c pr

inci

ple

favo

red

by t

he te

leco

mm

unic

atio

n in

dust

ry fo

r ad

vanc

ed h

igh-

perf

orm

ance

ne

twor

ks, e

.g.,

B-I

SD

N, a

s tr

ansp

ort m

echa

nism

st

atis

tical

(as

ynch

rono

us, o

n de

man

d) T

DM

(A

TD

M, S

TD

M)

cell

head

er d

eter

min

es th

e co

nnec

tion

the

user

dat

a be

long

s to

mix

ing

of d

iffer

ent c

ell-r

ates

is p

ossi

ble

diffe

rent

bit-

rate

s, c

onst

ant o

r va

riabl

e, fe

asib

le

inte

rest

ing

for

data

sou

rces

with

var

ying

bit-

rate

:e.

g., g

uara

ntee

d m

inim

um b

it-ra

tead

ditio

nally

bur

sty

traf

fic if

allo

wed

by

the

netw

ork

AT

M c

ell:

5 48

[

byte

]

conn

ectio

nid

entif

ier,

che

cksu

met

c.

cell

head

erus

erda

ta

Page 55: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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027.

55

Cel

l-bas

ed tr

ansm

issi

on

asyn

chro

nous

, cel

l-bas

ed tr

ansm

issi

on a

s ba

sis

for

AT

M

cont

inuo

us c

ell-s

trea

m

addi

tiona

l cel

ls n

eces

sary

for

oper

atio

n an

d m

aint

enan

ce o

f the

net

wor

k (O

AM

cel

ls; O

pera

tion

and

Mai

nten

ance

)

OA

M c

ells

can

be

inse

rted

afte

r fix

ed in

terv

als

to c

reat

e a

logi

cal f

ram

e st

ruct

ure

if a

stat

ion

has

no d

ata

to s

end

it au

tom

atic

ally

inse

rts

idle

cel

ls th

at c

an b

e di

scar

ded

at e

very

inte

rmed

iate

sys

tem

with

out f

urth

er n

otic

e if

no s

ynch

rono

us fr

ame

is a

vaila

ble

for

the

tran

spor

t of c

ells

(e.

g., S

DH

or

Son

et)

cell

boun

darie

s ha

ve to

be

dete

cted

sep

arat

ely

(e.g

., vi

a th

e ch

ecks

um in

the

cell

head

er)

Page 56: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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MC

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027.

56

phys

ical

laye

r

AT

M la

yer

AT

M a

dapt

atio

n la

yer

high

erla

yers

high

erla

yers

cont

rol

plan

e

layer management

plane management

user

pl

ane

pla

nes

laye

rs

B-I

SD

N p

roto

col r

efer

ence

mod

el

3 di

men

sion

al r

efer

ence

mod

elth

ree

vert

ical

pla

nes

(col

umns

)us

er p

lane

cont

rol p

lane

man

agem

ent p

lane

thre

e hi

erar

chic

al la

yers

phys

ical

laye

rA

TM

laye

rA

TM

ada

ptat

ion

laye

r

Out

-of-

Ban

d-S

igna

ling:

use

r da

ta is

tr

ansm

itted

sep

arat

ely

from

con

trol

in

form

atio

n

man

agem

ent p

lane

Page 57: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ller.

de/

MC

SS

027.

57

AT

M la

yers

Phy

sica

l lay

er, c

onsi

stin

g of

two

sub-

laye

rsph

ysic

al m

ediu

m d

epen

dent

sub

-laye

rco

ding

bit t

imin

g

tran

smis

sion

tran

smis

sion

con

verg

ence

sub

-laye

rH

EC

(H

eade

r E

rror

Cor

rect

ion)

seq

uenc

e ge

nera

tion

and

verif

icat

ion

tran

smis

sion

fram

e ad

apta

tion,

gen

erat

ion,

and

rec

over

y

cell

delin

eatio

n, c

ell r

ate

deco

uplin

g

AT

M la

yer

cell

mul

tiple

xing

/dem

ultip

lexi

ng

VP

I/VC

I tra

nsla

tion

cell

head

er g

ener

atio

n an

d ve

rific

atio

n

GF

C (

Gen

eric

Flo

w C

ontr

ol)

AT

M a

dapt

atio

n la

yer

(AA

L)

Page 58: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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MC

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027.

58

AT

M a

dapt

atio

n la

yer

(AA

L)

Pro

vide

s di

ffere

nt s

ervi

ce c

lass

es o

n to

p of

AT

M b

ased

on:

bit r

ate:

co

nsta

nt b

it ra

te: e

.g. t

radi

tiona

l tel

epho

ne li

neva

riabl

e bi

t rat

e: e

.g. d

ata

com

mun

icat

ion,

com

pres

sed

vide

o

time

cons

trai

nts

betw

een

send

er a

nd r

ecei

ver:

w

ith ti

me

cons

trai

nts:

e.g

. rea

l-tim

e ap

plic

atio

ns, i

nter

activ

e vo

ice

and

vide

ow

ithou

t tim

e co

nstr

aint

s: e

.g. m

ail,

file

tran

sfer

mod

e of

con

nect

ion:

conn

ectio

n or

ient

ed o

r co

nnec

tionl

ess

AA

L co

nsis

ts o

f tw

o su

b-la

yers

:C

onve

rgen

ce S

ubla

yer

(CS

): s

ervi

ce d

epen

dent

ada

ptat

ion

Com

mon

Par

t Con

verg

ence

Sub

laye

r (C

PC

S)

Ser

vice

Spe

cific

Con

verg

ence

Sub

laye

r (S

SC

S)

Seg

men

tatio

n an

d R

eass

embl

y S

ubla

yer

(SA

R)

sub-

laye

rs c

an b

e em

pty

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59

AT

M a

nd A

AL

conn

ectio

ns

AT

M la

yer:

serv

ice

inde

pend

ent t

rans

port

of A

TM

cel

ls

mul

tiple

x an

d de

mul

tiple

xfu

nctio

nalit

y

AA

L la

yer:

sup

port

of d

iffer

ent s

ervi

ces

phys

ical

laye

r

AT

M

AA

L

phys

ical

laye

r

AT

M

AA

L

end-

syst

em A

end-

syst

em B

AT

M n

etw

ork

serv

ice

depe

nden

tA

AL

conn

ectio

ns

serv

ice

inde

pend

ent

AT

M c

onne

ctio

ns

appl

icat

ion

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60

AT

M F

orum

Wire

less

AT

M W

orki

ng G

roup

AT

M F

orum

foun

ded

the

Wire

less

AT

M W

orki

ng G

roup

Jun

e 19

96T

ask:

dev

elop

men

t of s

peci

ficat

ions

to e

nabl

e th

e us

e of

AT

M

tech

nolo

gy a

lso

for

wire

less

net

wor

ks w

ith a

larg

e co

vera

ge o

f cu

rren

t net

wor

k sc

enar

ios

(priv

ate

and

publ

ic, l

ocal

and

glo

bal)

com

patib

ility

to e

xist

ing

AT

M F

orum

sta

ndar

ds im

port

ant

it sh

ould

be

poss

ible

to e

asily

upg

rade

exi

stin

g A

TM

net

wor

ks w

ith

mob

ility

func

tions

and

rad

io a

cces

s tw

o su

b-gr

oups

of w

ork

item

s

Mob

ile A

TM

Pro

toco

l Ext

ensi

ons

hand

over

sig

nalin

g

loca

tion

man

agem

ent

mob

ile r

outin

gtr

affic

and

QoS

Con

trol

netw

ork

man

agem

ent

Rad

io A

cces

s La

yer

(RA

L) P

roto

cols

radi

o ac

cess

laye

r

wire

less

med

ia a

cces

s co

ntro

l

wire

less

dat

a lin

k co

ntro

lra

dio

reso

urce

con

trol

hand

over

issu

es

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61

WA

TM

ser

vice

s

Offi

ce e

nviro

nmen

tm

ultim

edia

con

fere

ncin

g, o

nlin

e m

ultim

edia

dat

abas

e ac

cess

Uni

vers

ities

, sch

ools

, tra

inin

g ce

nter

sdi

stan

ce le

arni

ng, t

each

ing

Indu

stry da

taba

se c

onne

ctio

n, s

urve

illan

ce, r

eal-t

ime

fact

ory

man

agem

ent

Hos

pita

ls relia

ble,

hig

h-ba

ndw

idth

net

wor

k, m

edic

al im

ages

, rem

ote

mon

itorin

g

Hom

ehi

gh-b

andw

idth

inte

rcon

nect

of d

evic

es (

TV

, CD

, PC

, ...)

Net

wor

ked

vehi

cles

truc

ks, a

ircra

ft et

c. in

terc

onne

ct, p

lato

onin

g, in

telli

gent

roa

ds

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62

WA

TM

com

pone

nts

WM

T (

Wire

less

Mob

ile A

TM

Ter

min

al)

RA

S(R

adio

Acc

ess

Sys

tem

)E

MA

S-E

(E

nd-u

ser

Mob

ility

-sup

port

ing

AT

M S

witc

h -

Edg

e)E

MA

S-N

(E

nd-u

ser

Mob

ility

-sup

port

ing

AT

M S

witc

h -

Net

wor

k)M

-NN

I (N

etw

ork-

to-N

etw

ork

Inte

rfac

e w

ith M

obili

ty s

uppo

rt)

LS (

Loca

tion

Ser

ver)

AU

S (

Aut

hent

icat

ion

Ser

ver)

Page 63: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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63

Ref

eren

ce m

odel

WM

T WM

T

EM

AS

-E

EM

AS

-N

EM

AS

-N

M-N

NI

RA

S RA

S

LS AU

S

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Use

r pl

ane

prot

ocol

laye

rs

WA

TM

term

inal

adap

ter

MA

TM

term

i-na

lR

AS

EM

AS

-EE

MA

S-N

AT

M-

Sw

itch

fixed

end

syst

em

radi

ose

gmen

tfix

edne

twor

kse

gmen

t

RA

L

AT

M

PH

YP

HY

AT

M

PH

Y

AA

L

user

proc

ess

AT

M

AA

L

user

pro

cess

AT

M-

CL

AT

M

RA

LP

HY

AT

M-

CL

AT

M

PH

YP

HY

AT

M

PH

YP

HY

Page 65: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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65

Con

trol

pla

ne p

roto

col l

ayer

s

AT

M

PH

Y

SA

AL

SIG

,U

NI

RA

L

M-A

TM

SA

AL

SIG

,M

-UN

I

AT

M-

CL

AT

M

RA

LP

HY

AT

M-

CL

AT

M

PH

YP

HY

SA

AL

SIG

,M

-UN

I,M

-PN

NI

AT

M

PH

YP

HY

SA

AL

SIG

,M

-PN

NI

AT

M

PH

YP

HY

SA

AL

SIG

,P

NN

I,U

NI

WA

TM

term

inal

adap

ter

MA

TM

term

i-na

lR

AS

EM

AS

-EE

MA

S-N

AT

M-

Sw

itch

fixed

end

syst

em

radi

ose

gmen

tfix

edne

twor

kse

gmen

t

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66

Ref

eren

cem

odel

with

furt

her

acce

sssc

enar

ios

I

1: w

irele

ss a

d-ho

c A

TM

net

wor

k2:

wire

less

mob

ile A

TM

term

inal

s3:

mob

ile A

TM

term

inal

s4:

mob

ile A

TM

sw

itche

s5:

fixe

d A

TM

term

inal

s6:

fixe

d w

irele

ss A

TM

term

inal

s

WM

T: w

irele

ssm

obile

term

inal

WT

: wire

less

term

inal

MT

: mob

ile te

rmin

alT

: ter

min

al

AP

: acc

ess

poin

t

EM

AS

: end

-use

rm

obili

tysu

ppor

ting

AT

M s

witc

h(-

E: e

dge,

-N

: net

wor

k)N

MA

S: n

etw

ork

mob

ility

supp

ortin

gA

TM

sw

itch

MS

: mob

ile A

TM

sw

itch

Page 67: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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67

Ref

eren

cem

odel

with

furt

her

acce

sssc

enar

ios

II

RA

SA

CT

WM

T

WM

T

NM

AS

RA

SR

AS

MS

T

EM

AS

-EM

TW

TR

AS

EM

AS

-NT

RA

SE

MA

S-E

WM

T

1

2

3

4

5

6

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68

BR

AN

–B

road

band

Rad

io A

cces

s N

etw

orks

Mot

ivat

ion

dere

gula

tion,

priv

atiz

atio

n, n

ew c

ompa

nies

, new

ser

vice

s

How

to r

each

the

cust

omer

?al

tern

ativ

es: x

DS

L, c

able

, sat

ellit

e, r

adio

Rad

io a

cces

sfle

xibl

e (s

uppo

rts

traf

fic m

ix, m

ultip

lexi

ng fo

r hi

gher

effi

cien

cy, c

an b

e as

ymm

etric

al)

quic

k in

stal

latio

n

econ

omic

(in

crem

enta

l gro

wth

pos

sibl

e)

Mar

ket pr

ivat

e cu

stom

ers

(Int

erne

t acc

ess,

tele

-xy.

..)

smal

l and

med

ium

siz

ed b

usin

ess

(Int

erne

t, M

M c

onfe

renc

ing,

VP

N)

Sco

pe o

f sta

ndar

diza

tion

acce

ss n

etw

orks

, ind

oor/

cam

pus

mob

ility

, 25-

155

Mbi

t/s, 5

0 m

-5 k

m

coor

dina

tion

with

AT

M F

orum

, IE

TF

, ET

SI,

IEE

E, .

...

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Bro

adba

ndne

twor

kty

pes

Com

mon

cha

ract

eris

tics

AT

M Q

oS (

CB

R, V

BR

, UB

R, A

BR

)

HIP

ER

LAN

/2sh

ort r

ange

(<

200

m),

indo

or/c

ampu

s, 2

5 M

bit/s

use

r da

ta r

ate

acce

ss to

tele

com

mun

icat

ion

syst

ems,

mul

timed

ia a

pplic

atio

ns, m

obili

ty

(<10

m/s

)

HIP

ER

AC

CE

SS

wid

er r

ange

(<

5 k

m),

out

door

, 25

Mbi

t/s u

ser

data

rat

e

fixed

rad

io li

nks

to c

usto

mer

s (“

last

mile

”), a

ltern

ativ

e to

xD

SL

or c

able

m

odem

, qui

ck in

stal

latio

n

Sev

eral

(pr

oprie

tary

) pr

oduc

ts e

xist

with

155

Mbi

t/s p

lus

QoS

HIP

ER

LIN

K –

curr

ently

no

activ

ities

inte

rmed

iate

link

, 155

Mbi

t/s

conn

ectio

n of

HIP

ER

LAN

acc

ess

poin

ts o

r co

nnec

tion

betw

een

HIP

ER

AC

CE

SS

nod

es

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70

BR

AN

and

lega

cy n

etw

orks

Inde

pend

ence

BR

AN

as

acce

ss n

etw

ork

inde

pend

ent f

rom

the

fixed

net

wor

k

Inte

rwor

king

of T

CP

/IP a

nd A

TM

und

er s

tudy

Laye

red

mod

elN

etw

ork

Con

verg

ence

Sub

-laye

r as

sup

erse

t of a

ll re

quire

men

ts fo

r IP

and

A

TM co

rene

twor

kA

TM

core

netw

ork

IP

netw

ork

conv

erge

nce

subl

ayer

BR

AN

dat

alin

k co

ntro

l

BR

AN

PH

Y-1

BR

AN

PH

Y-2

...

Coo

rdin

atio

nIE

TF

(T

CP

/IP)

AT

M fo

rum

(A

TM

)E

TS

I (U

MT

S)

CE

PT

, IT

U-R

, ...

(rad

io fr

eque

ncie

s)

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71

Hip

erLA

N2

Offi

cial

nam

e: B

RA

N H

IPE

RLA

N T

ype

2H

/2, H

IPE

RLA

N/2

als

o us

ed

Hig

h da

ta r

ates

for

user

sM

ore

effic

ient

than

802

.11a

Con

nect

ion

orie

nted

QoS

sup

port

Dyn

amic

freq

uenc

y se

lect

ion

Sec

urity

sup

port

Str

ong

encr

yptio

n/au

then

ticat

ion

Mob

ility

sup

port

Net

wor

k an

d ap

plic

atio

n in

depe

nden

tco

nver

genc

e la

yers

for

Eth

erne

t, IE

EE

139

4, A

TM

, 3G

Pow

er s

ave

mod

es

Plu

g an

d P

lay

ww

w.h

iper

lan2

.com

Page 72: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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2

3

1

AP

Hip

erLA

N2

arch

itect

ure

and

hand

over

sce

nario

s

AP

TA

PC

Cor

eN

etw

ork

(Eth

erne

t,F

irew

ire,

AT

M,

UM

TS

)A

PT

AP

T

AP

CAP

MT

4

MT

3

MT

2

MT

1

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Cen

tral

ized

vs.

dire

ct m

ode

MT

1

AP

/CC

AP

MT

2

data

cont

rol

cont

rol

MT

1M

T2

data

cont

rol

Cen

tral

ized

Dir

ectM

T1

MT

2 +

CC

data

cont

rol

Page 74: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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74

Hip

erLA

N2

prot

ocol

sta

ck

Hig

her

laye

rs

Con

verg

ence

laye

r Dat

alin

k co

ntro

l-ba

sic

data

tran

spor

tfun

ctio

nS

cope

of

Hip

erLA

N2

stan

dard

s

DLC

con

trol

SA

PD

LC u

ser

SA

P

Rad

io li

nk c

ontr

olsu

blay

er

Phy

sica

llay

er

Rad

iore

sour

ceco

ntro

l

Ass

oc.

cont

rol

DLC

conn

.co

ntro

lE

rror

cont

rol

Rad

io li

nk c

ontr

ol

Med

ium

acc

ess

cont

rol

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75

Phy

sica

l lay

er r

efer

ence

con

figur

atio

n

scra

mbl

ing

FE

C c

odin

gin

terle

avin

g

map

ping

OF

DM

PH

Y b

urst

s(P

PD

U)

PD

U tr

ain

from

DLC

(PS

DU

)

radi

otr

ansm

itter

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oche

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76

Ope

ratin

g ch

anne

ls o

f Hip

erLA

N2

in E

urop

e

5150

[MH

z]51

8053

5052

00

3644

16.6

MH

z

cent

er fr

eque

ncy

=

5000

+ 5

*cha

nnel

num

ber

[MH

z]

chan

nel

4048

5256

6064

5220

5240

5260

5280

5300

5320

5470

[MH

z]

5500

5725

5520

100

108

16.6

MH

z

chan

nel

104

112

116

120

124

128

5540

5560

5580

5600

5620

5640

132

136

140

5660

5680

5700

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

77

Bas

ic s

truc

ture

of H

iper

LAN

2 M

AC

fram

es

MA

C fr

ame

MA

C fr

ame

MA

C fr

ame

MA

C fr

ame

2 m

s2

ms

2 m

s2

ms

broa

dcas

t pha

sedo

wnl

ink

phas

eup

link

phas

era

ndom

acce

ss p

hase. .

.

TD

D,

500

OF

DM

sym

bols

per

fram

e

varia

ble

varia

ble

varia

ble

LCH

PD

U ty

pese

quen

cenu

mbe

rpa

yloa

dC

RC

UD

CH

tran

sfer

syn

tax

(long

PD

U)

54 b

yte

210

396

24bi

t

LCH

PD

U ty

pepa

yloa

dC

RC

240

624

LCH

tran

sfer

syn

tax

bit

Page 78: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

78

Val

id c

onfig

urat

ions

of H

iper

LAN

2 M

AC

fram

es

MA

C fr

ame

MA

C fr

ame

MA

C fr

ame

MA

C fr

ame

2 m

s2

ms

2 m

s2

ms

BC

HF

CH

AC

HD

L ph

ase

DiL

phas

eU

L ph

ase

RC

Hs

. . .

BC

HF

CH

AC

HD

iLph

ase

UL

phas

eR

CH

s

BC

HF

CH

AC

HD

L ph

ase

UL

phas

eR

CH

s

BC

HF

CH

AC

HU

L ph

ase

RC

Hs

BC

HF

CH

AC

HD

L ph

ase

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phas

eR

CH

s

BC

HF

CH

AC

HD

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ase

RC

Hs

BC

HF

CH

AC

HD

L ph

ase

RC

Hs

BC

HF

CH

AC

HR

CH

s

Val

idco

mbi

natio

nsof

MA

C fr

ames

for

a si

ngle

se

ctor

AP

broa

dcas

tdo

wnl

ink

uplin

k

rand

omac

cess

Page 79: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

79

Map

ping

of l

ogic

al a

nd tr

ansp

ort c

hann

els

BC

CH

FC

CH

RF

CH

LCC

HR

BC

HD

CC

HU

DC

HU

BC

HU

MC

H

BC

HF

CH

AC

HS

CH

LCH

do

wn

link

UD

CH

DC

CH

LCC

HA

SC

H

SC

HLC

HR

CH

up

link

UD

CH

UB

CH

UM

CH

LCH

DC

CH

RB

CH

SC

H

LCC

H

dir

ect

link

Page 80: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

80

Blu

etoo

th

Idea

Uni

vers

al r

adio

inte

rfac

e fo

r ad

-hoc

wire

less

con

nect

ivity

Inte

rcon

nect

ing

com

pute

r an

d pe

riphe

rals

, han

dhel

d de

vice

s, P

DA

s, c

ell

phon

es –

repl

acem

ent o

f IrD

AE

mbe

dded

in o

ther

dev

ices

, goa

l: 5€

/dev

ice

(200

2: 5

0€/U

SB

blu

etoo

th)

Sho

rt r

ange

(10

m),

low

pow

er c

onsu

mpt

ion,

lice

nse-

free

2.4

5 G

Hz

ISM

Voi

ce a

nd d

ata

tran

smis

sion

, app

rox.

1 M

bit/s

gro

ss d

ata

rate

One

of t

he fi

rst m

odul

es (

Eric

sson

).

Page 81: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

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oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

81

Blu

etoo

th

His

tory

1994

: Eric

sson

(M

attis

on/H

aart

sen)

, “M

C-li

nk”

proj

ect

Ren

amin

g of

the

proj

ect:

Blu

etoo

th a

ccor

ding

to H

aral

d“B

låta

nd”

Gor

mse

n[s

on o

f Gor

m],

Kin

g of

Den

mar

k in

the

10th

cent

ury

1998

: fou

ndat

ion

of B

luet

ooth

SIG

, ww

w.b

luet

ooth

.org

1999

: ere

ctio

n of

a r

une

ston

e at

Erc

isso

n/Lu

nd ;-

)

2001

: firs

t con

sum

er p

rodu

cts

for

mas

s m

arke

t, sp

ec. v

ersi

on 1

.1re

leas

ed

Spe

cial

Inte

rest

Gro

upO

rigin

al fo

undi

ng m

embe

rs: E

ricss

on, I

ntel

, IB

M, N

okia

, Tos

hiba

Add

ed p

rom

oter

s: 3

Com

, Age

re(w

as: L

ucen

t), M

icro

soft,

Mot

orol

a

> 2

500

mem

bers

Com

mon

spe

cific

atio

n an

d ce

rtifi

catio

n of

pro

duct

s

(was

:

)

Page 82: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

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oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

82

His

tory

and

hi-t

ech…

1999

:E

ricss

on m

obile

co

mm

unic

atio

nsA

B

rest

ede

nna

sten

till

min

neav

Har

ald

Blå

tand

, som

fick

gesi

ttna

mn

åten

ny

tekn

olog

iför

tråd

lös,

m

obil

kom

mun

ikat

ion.

Page 83: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

83

…an

d th

ere

al r

une

ston

e

Loca

ted

in J

ellin

g, D

enm

ark,

erec

ted

by K

ing

Har

ald

“Blå

tand

”in

mem

ory

of h

is p

aren

ts.

The

sto

ne h

as th

ree

side

s –

one

side

show

ing

a pi

ctur

e of

Chr

ist.

Thi

s co

uld

be th

e “o

rigin

al”

colo

rs

of th

e st

one.

Insc

riptio

n:“a

uk ta

nika

rthi

kris

tna”

(an

d m

ade

the

Dan

es C

hris

tians

)

Insc

riptio

n:"H

aral

dki

ng e

xecu

tes

thes

e se

pulc

hral

m

onum

ents

afte

r G

orm

, his

fath

er a

nd

Thy

ra, h

is m

othe

r. T

he H

aral

dw

ho w

on th

e w

hole

of D

enm

ark

and

Nor

way

and

turn

ed

the

Dan

es to

Chr

istia

nity

."

Btw

: Blå

tand

mea

ns “

of d

ark

com

plex

ion”

(not

hav

ing

a bl

ue to

oth…

)

Page 84: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

84

Cha

ract

eris

tics

2.4

GH

z IS

M b

and,

79

(23)

RF

cha

nnel

s, 1

MH

z ca

rrie

r sp

acin

gC

hann

el 0

: 240

2 M

Hz

… c

hann

el 7

8: 2

480

MH

z

G-F

SK

mod

ulat

ion,

1-1

00 m

W tr

ansm

it po

wer

FH

SS

and

TD

DF

requ

ency

hop

ping

with

160

0 ho

ps/s

Hop

ping

seq

uenc

e in

a p

seud

o ra

ndom

fash

ion,

det

erm

ined

by

a m

aste

r

Tim

e di

visi

on d

uple

x fo

r se

nd/r

ecei

ve s

epar

atio

n

Voi

ce li

nk –

SC

O (

Syn

chro

nous

Con

nect

ion

Orie

nted

)F

EC

(fo

rwar

d er

ror

corr

ectio

n), n

o re

tran

smis

sion

, 64

kbit/

s du

plex

, poi

nt-

to-p

oint

, circ

uit s

witc

hed

Dat

a lin

k –

AC

L (A

sync

hron

ous

Con

nect

ionL

ess)

Asy

nchr

onou

s, fa

st a

ckno

wle

dge,

poi

nt-t

o-m

ultip

oint

, up

to 4

33.9

kbi

t/s

sym

met

ric o

r 72

3.2/

57.6

kbi

t/s a

sym

met

ric, p

acke

t sw

itche

d

Top

olog

yO

verla

ppin

g pi

cone

ts(s

tars

) fo

rmin

g a

scat

tern

et

Page 85: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

85

Pic

onet

Col

lect

ion

of d

evic

es c

onne

cted

in a

n ad

hoc

fa

shio

n

One

uni

t act

s as

mas

ter

and

the

othe

rs a

s sl

aves

fo

r th

e lif

etim

e of

the

pico

net

Mas

ter

dete

rmin

es h

oppi

ng p

atte

rn, s

lave

s ha

ve

to s

ynch

roni

ze

Eac

h pi

cone

t has

a u

niqu

e ho

ppin

g pa

ttern

Par

ticip

atio

n in

a p

icon

et =

syn

chro

niza

tion

to

hopp

ing

sequ

ence

Eac

h pi

cone

t has

one

mas

ter

and

up to

7

sim

ulta

neou

s sl

aves

(>

200

cou

ld b

e pa

rked

)

M=

Mas

ter

S=

Sla

veP

=P

arke

dS

B=

Sta

ndby

M

S

P

SB

S S

P

P

SB

Page 86: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

86

For

min

g a

pico

net

All

devi

ces

in a

pic

onet

hop

toge

ther

Mas

ter

give

s sl

aves

its

cloc

k an

d de

vice

IDH

oppi

ng p

atte

rn: d

eter

min

ed b

y de

vice

ID (

48 b

it, u

niqu

e w

orld

wid

e)P

hase

in h

oppi

ng p

atte

rn d

eter

min

ed b

y cl

ock

Add

ress

ing

Act

ive

Mem

ber

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ress

(A

MA

, 3 b

it)P

arke

d M

embe

r A

ddre

ss (

PM

A, 8

bit)

SB

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M

S

P

SB

S S

P

P

SB

Page 87: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

87

Sca

ttern

et

Link

ing

of m

ultip

le c

o-lo

cate

d pi

cone

tsth

roug

h th

e sh

arin

g of

com

mon

m

aste

r or

sla

ve d

evic

esD

evic

es c

an b

e sl

ave

in o

ne p

icon

et a

nd m

aste

r of

ano

ther

Com

mun

icat

ion

betw

een

pico

nets

Dev

ices

jum

ping

bac

k an

d fo

rth

betw

een

the

pico

nets

M=

Mas

ter

S=

Sla

veP

=P

arke

dS

B=

Sta

ndby

M

S

P

SB

S

S

P

P

SB

M

S

S

P

SB

Pic

onet

s(e

ach

with

a

capa

city

of

< 1

Mbi

t/s)

Page 88: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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ng. J

oche

nS

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ttp://

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chen

schi

ller.

de/

MC

SS

027.

88

Blu

etoo

th p

roto

col s

tack

Rad

io

Bas

eban

d

Link

Man

agerC

ontr

ol

Hos

tC

ontr

olle

rIn

terf

ace

Logi

cal L

ink

Con

trol

and

Ada

ptat

ion

Pro

toco

l (L2

CA

P)

Aud

io

TC

S B

INS

DP

OB

EX

vCal

/vC

ard

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NW

app

s.

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inte

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e)

AT

mod

emco

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tele

phon

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ps.

audi

o ap

ps.

mgm

nt. a

pps.

AT

: atte

ntio

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quen

ceO

BE

X: o

bjec

t exc

hang

eT

CS

BIN

: tel

epho

ny c

ontr

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roto

col s

peci

ficat

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–bi

nary

BN

EP

: Blu

etoo

th n

etw

ork

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psul

atio

n pr

otoc

ol

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ervi

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pro

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OM

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adio

freq

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mm

.

Page 89: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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ng. J

oche

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ttp://

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chen

schi

ller.

de/

MC

SS

027.

89

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Fre

quen

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ta tr

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Page 90: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

90

Bas

eban

d

Pic

onet

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nnel

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initi

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acke

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initi

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evic

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., de

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

91

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Page 92: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

92

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f. D

r.-I

ng. J

oche

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chill

er, h

ttp://

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chen

schi

ller.

de/

MC

SS

027.

93

Bas

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108.

810

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108.

8

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11

0-27

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172.

817

2.8

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0-12

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254

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32

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yes

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0-22

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yes

433.

972

3.2

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AU

X1

10-

29no

no18

5.6

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618

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1na

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3no

64.0

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2na

202/

3no

64.0

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3na

30no

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DV

1 D

10+

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) D

2/3

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s D

64.0

+57

.6 D

AC

L 1 sl

ot

3 sl

ot

5 sl

ot

SC

O

Dat

a M

ediu

m/H

igh

rate

, Hig

h-qu

ality

Voi

ce, D

ata

and

Voi

ce

Page 94: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

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oche

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er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

94

Bas

eban

d lin

k ty

pes

Pol

ling-

base

d T

DD

pac

ket t

rans

mis

sion

625µ

s sl

ots,

mas

ter

polls

sla

ves

SC

O (

Syn

chro

nous

Con

nect

ion

Orie

nted

) –

Voi

ce

Per

iodi

c si

ngle

slo

t pac

ket a

ssig

nmen

t, 64

kbi

t/s fu

ll-du

plex

, poi

nt-t

o-po

int

AC

L (A

sync

hron

ous

Con

nect

ionL

ess)

–D

ata

Var

iabl

e pa

cket

siz

e (1

,3,5

slo

ts),

asy

mm

etric

ban

dwid

th, p

oint

-to-

mul

tipoi

nt

MA

ST

ER

SL

AV

E 1

SL

AV

E 2

f 6f 0

f 1f 7

f 12

f 13

f 19

f 18

SC

OS

CO

SC

OS

CO

AC

L

f 5f 2

1

f 4f 2

0

AC

LA

CL

f 8

f 9

f 17

f 14

AC

L

Page 95: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

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er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

95

Rob

ustn

ess

Slo

w fr

eque

ncy

hopp

ing

with

hop

ping

pat

tern

s de

term

ined

by

a m

aste

rP

rote

ctio

n fr

om in

terf

eren

ce o

n ce

rtai

n fr

eque

ncie

s

Sep

arat

ion

from

oth

er p

icon

ets

(FH

-CD

MA

)

Ret

rans

mis

sion

AC

L on

ly, v

ery

fast

For

war

d E

rror

Cor

rect

ion

SC

O a

nd A

CL

MA

ST

ER

SL

AV

E 1

SL

AV

E 2

AC

CH

F

GG

BD

E

NA

KA

CK

Page 96: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

96

Bas

eban

d st

ates

of a

Blu

etoo

th d

evic

e

stan

dby

inqu

irypa

ge

conn

ecte

dA

MA

tran

smit

AM

A

park

PM

Aho

ldA

MA

sniff

AM

A

unco

nnec

ted

conn

ectin

g

activ

e

low

pow

er

Sta

ndby

: do

noth

ing

Inqu

ire: s

earc

h fo

r ot

her

devi

ces

Pag

e: c

onne

ct to

a s

peci

fic d

evic

eC

onne

cted

: par

ticip

ate

in a

pic

onet

deta

ch

Par

k: r

elea

se A

MA

, get

PM

A

Sni

ff: li

sten

per

iodi

cally

, not

eac

h sl

otH

old:

sto

p A

CL,

SC

O s

till p

ossi

ble,

pos

sibl

y pa

rtic

ipat

e in

ano

ther

pic

onet

Page 97: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

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ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

97

Exa

mpl

e: P

ower

con

sum

ptio

n/C

SR

Blu

eCor

e2

Typ

ical

Ave

rag

e C

urr

ent

Co

nsu

mp

tio

n (

1)V

DD

=1.

8V T

empe

ratu

re =

20°

CM

od

e S

CO

con

nect

ion

HV

3 (1

s in

terv

al S

niff

Mod

e) (

Sla

ve)

26.0

mA

SC

O c

onne

ctio

n H

V3

(1s

inte

rval

Sni

ff M

ode)

(M

aste

r)26

.0 m

AS

CO

con

nect

ion

HV

1 (S

lave

) 53

.0 m

AS

CO

con

nect

ion

HV

1 (M

aste

r)

53.0

mA

AC

L da

ta tr

ansf

er 1

15.2

kbps

UA

RT

(M

aste

r)

15.5

mA

AC

L da

ta tr

ansf

er 7

20kb

ps U

SB

(S

lave

) 53

.0 m

AA

CL

data

tran

sfer

720

kbps

US

B (

Mas

ter)

53

.0 m

AA

CL

conn

ectio

n, S

niff

Mod

e 40

ms

inte

rval

, 38.

4kbp

s U

AR

T

4.0

mA

AC

L co

nnec

tion,

Sni

ff M

ode

1.28

s in

terv

al, 3

8.4k

bps

UA

RT

0.

5 m

AP

arke

d S

lave

, 1.2

8s b

eaco

n in

terv

al, 3

8.4k

bps

UA

RT

0.

6 m

AS

tand

by M

ode

(Con

nect

ed to

hos

t, no

RF

act

ivity

)47

.0 µ

AD

eep

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ep M

ode(

2)

20.0

µA

No

tes:

(1)

Cur

rent

con

sum

ptio

n is

the

sum

of b

oth

BC

2120

15A

and

the

flash

.(2

) C

urre

nt c

onsu

mpt

ion

is fo

r th

e B

C21

2015

A d

evic

e on

ly.

(Mor

e: w

ww

.csr

.com

)

Page 98: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

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oche

nS

chill

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ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

98

Exa

mpl

e: B

luet

ooth

/US

B a

dapt

er(2

002:

50€

)

Page 99: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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oche

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ttp://

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chen

schi

ller.

de/

MC

SS

027.

99

L2C

AP

-Lo

gica

l Lin

k C

ontr

ol a

nd A

dapt

atio

n P

roto

col

Sim

ple

data

link

pro

toco

l on

top

of b

aseb

and

Con

nect

ion

orie

nted

, con

nect

ionl

ess,

and

sig

nalli

ngch

anne

ls

Pro

toco

l mul

tiple

xing

RF

CO

MM

, SD

P, t

elep

hony

con

trol

Seg

men

tatio

n &

rea

ssem

bly

Up

to 6

4kby

te u

ser

data

, 16

bit C

RC

use

d fr

om b

aseb

and

QoS

flow

spe

cific

atio

n pe

r ch

anne

lF

ollo

ws

RF

C 1

363,

spe

cifie

s de

lay,

jitte

r, b

urst

s, b

andw

idth

Gro

up a

bstr

actio

nC

reat

e/cl

ose

grou

p, a

dd/r

emov

e m

embe

r

Page 100: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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chill

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ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

100

L2C

AP

logi

cal c

hann

els

base

band

L2C

AP

base

band

L2C

AP

base

band

L2C

AP

Sla

veS

lave

Mas

ter

AC

L

2d

1d

d1

1d

21

sign

allin

gco

nnec

tionl

ess

conn

ectio

n-or

ient

ed

dd

d

Page 101: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

101

L2C

AP

pac

ket f

orm

ats

leng

th

2by

tes

CID

=2

2

PS

M≥2pa

yloa

d

0-65

533

leng

th

2by

tes

CID2

payl

oad

0-65

535

leng

th

2by

tes

CID

=1

2

One

or

mor

e co

mm

ands

Con

nect

ionl

ess

PD

U

Con

nect

ion-

orie

nted

PD

U

Sig

nalli

ngco

mm

and

PD

U code

IDle

ngth

data

11

2≥0

Page 102: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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oche

nS

chill

er, h

ttp://

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chen

schi

ller.

de/

MC

SS

027.

102

Sec

urity

E3

E2

link

key

(128

bit)

encr

yptio

n ke

y (1

28 b

it)

payl

oad

key

Key

stre

amge

nera

tor

Dat

aD

ata

Cip

her

data

Aut

hent

icat

ion

key

gene

ratio

n(p

ossi

bly

perm

anen

t sto

rage

)

Enc

rypt

ion

key

gene

ratio

n(t

empo

rary

sto

rage

)

PIN

(1-

16 b

yte)

Use

r in

put (

initi

aliz

atio

n)

Pai

ring

Aut

hent

icat

ion

Enc

rypt

ion

Cip

herin

g

E3

E2

link

key

(128

bit)

encr

yptio

n ke

y (1

28 b

it)

payl

oad

key

Key

stre

amge

nera

tor

PIN

(1-

16 b

yte)

Page 103: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

103

SD

P –

Ser

vice

Dis

cove

ry P

roto

col

Inqu

iry/r

espo

nse

prot

ocol

for

disc

over

ing

serv

ices

Sea

rchi

ng fo

r an

d br

owsi

ng s

ervi

ces

in r

adio

pro

xim

ity

Ada

pted

to th

e hi

ghly

dyn

amic

env

ironm

ent

Can

be

com

plem

ente

d by

oth

ers

like

SLP

, Jin

i, S

alut

atio

n, …

Def

ines

dis

cove

ry o

nly,

not

the

usag

e of

ser

vice

s

Cac

hing

of d

isco

vere

d se

rvic

esG

radu

al d

isco

very

Ser

vice

rec

ord

form

atIn

form

atio

n ab

out s

ervi

ces

prov

ided

by

attr

ibut

es

Attr

ibut

es a

re c

ompo

sed

of a

n 16

bit

ID (

nam

e) a

nd a

val

ueva

lues

may

be

deriv

ed fr

om 1

28 b

it U

nive

rsal

ly U

niqu

e Id

entif

iers

(U

UID

)

Page 104: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

104

Add

ition

al p

roto

cols

to s

uppo

rt le

gacy

pro

toco

ls/a

pps.

RF

CO

MM

Em

ulat

ion

of a

ser

ial p

ort (

supp

orts

a la

rge

base

of l

egac

y ap

plic

atio

ns)

Allo

ws

mul

tiple

por

ts o

ver

a si

ngle

phy

sica

l cha

nnel

Tel

epho

ny C

ontr

ol P

roto

col S

peci

ficat

ion

(TC

S)

Cal

l con

trol

(se

tup,

rel

ease

)

Gro

up m

anag

emen

t

OB

EX

Exc

hang

e of

obj

ects

, IrD

A r

epla

cem

ent

WA

PIn

tera

ctin

g w

ith a

pplic

atio

ns o

n ce

llula

r ph

ones

Page 105: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

105

Pro

files

Rep

rese

nt d

efau

lt so

lutio

ns fo

r a

cert

ain

usag

e m

odel

Ver

tical

slic

e th

roug

h th

e pr

otoc

ol s

tack

Bas

is fo

r in

tero

pera

bilit

y

Gen

eric

Acc

ess

Pro

file

Ser

vice

Dis

cove

ry A

pplic

atio

n P

rofil

eC

ordl

ess

Tel

epho

ny P

rofil

eIn

terc

om P

rofil

eS

eria

l Por

t Pro

file

Hea

dset

Pro

file

Dia

l-up

Net

wor

king

Pro

file

Fax

Pro

file

LAN

Acc

ess

Pro

file

Gen

eric

Obj

ect E

xcha

nge

Pro

file

Obj

ect P

ush

Pro

file

File

Tra

nsfe

r P

rofil

eS

ynch

roni

zatio

n P

rofil

e

Ad

dit

ion

al P

rofi

les

Adv

ance

d A

udio

Dis

trib

utio

nP

AN

Aud

io V

ideo

Rem

ote

Con

trol

Bas

ic P

rintin

gB

asic

Imag

ing

Ext

ende

d S

ervi

ce D

isco

very

Gen

eric

Aud

io V

ideo

Dis

trib

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ands

Fre

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ardc

opy

Cab

le R

epla

cem

ent

Pro

files

Protocols

App

licat

ions

Page 106: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

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ttp://

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chen

schi

ller.

de/

MC

SS

027.

106

WP

AN

: IE

EE

802

.15-

1 –

Blu

etoo

th

Dat

a ra

te Syn

chro

nous

, con

nect

ion-

orie

nted

: 64

kbit/

sA

sync

hron

ous,

con

nect

ionl

ess

433.

9 kb

it/s

sym

met

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6 kb

it/s

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met

ric

Tra

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issi

on r

ange

PO

S (

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sona

l Ope

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g S

pace

) up

to

10 m

with

spe

cial

tran

scei

vers

up

to 1

00 m

Fre

quen

cy Fre

e 2.

4 G

Hz

ISM

-ban

d

Sec

urity

Cha

lleng

e/re

spon

se (

SA

FE

R+

), h

oppi

ng

sequ

ence

Cos

t50

€ a

dapt

er, d

rop

to 5€ if

inte

grat

ed

Ava

ilabi

lity

Inte

grat

ed in

to s

ome

prod

ucts

, sev

eral

ve

ndor

s

Con

nect

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set-

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me

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pow

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agea

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ublic

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ded,

key

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anag

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spe

cifie

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impl

e sy

stem

inte

grat

ion

Spe

cial

Adv

anta

ges/

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adva

ntag

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: alre

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inte

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to

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ava

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eer

to p

eer,

sca

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ets

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terf

eren

ce o

n IS

M-b

and,

lim

ited

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e, m

ax. 8

de

vice

s/ne

twor

k&m

aste

r, h

igh

set-

up

late

ncy

Page 107: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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oche

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ttp://

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schi

ller.

de/

MC

SS

027.

107

WP

AN

: IE

EE

802

.15

–fu

ture

dev

elop

men

ts 1

802.

15-2

: Coe

xist

ance

Coe

xist

ence

of W

irele

ss P

erso

nal A

rea

Net

wor

ks (

802.

15)

and

Wire

less

Lo

cal A

rea

Net

wor

ks (

802.

11),

qua

ntify

the

mut

ual i

nter

fere

nce

802.

15-3

: Hig

h-R

ate

Sta

ndar

d fo

r hi

gh-r

ate

(20M

bit/s

or

grea

ter)

WP

AN

s, w

hile

stil

l low

-po

wer

/low

-cos

t D

ata

Rat

es: 1

1, 2

2, 3

3, 4

4, 5

5 M

bit/s

Qua

lity

of S

ervi

ce is

ochr

onou

s pr

otoc

ol

Ad

hoc

peer

-to-

peer

net

wor

king

S

ecur

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Low

pow

er c

onsu

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Low

cos

t D

esig

ned

to m

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req

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ts o

f por

tabl

e co

nsum

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agin

g an

d m

ultim

edia

app

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Page 108: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

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MC

SS

027.

108

WP

AN

: IE

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802

.15

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ture

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ts 2

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ery

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ata

rate

sol

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ulti-

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mul

ti-ye

ar b

atte

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fe a

nd v

ery

low

com

plex

ity

Pot

entia

l app

licat

ions

are

sen

sors

, int

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toys

, sm

art b

adge

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emot

e co

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ls, a

nd h

ome

auto

mat

ion

Dat

a ra

tes

of 2

0-25

0 kb

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late

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dow

n to

15

ms

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ter-

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ve o

r P

eer-

to-P

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oper

atio

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Sup

port

for

criti

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aten

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evic

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uch

as jo

ystic

ks

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MA

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cha

nnel

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a ce

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lotte

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ic n

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ork

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ly h

ands

hake

dpr

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r tr

ansf

er r

elia

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yP

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man

agem

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o en

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low

pow

er c

onsu

mpt

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hann

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in th

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Hz

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ban

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0 ch

anne

ls in

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z U

S IS

M

band

and

one

cha

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urop

ean

868

MH

z ba

nd

Page 109: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

109

WLA

N: H

ome

RF

Dat

a ra

te 0.8,

1.6

, 5, 1

0 M

bit/s

Tra

nsm

issi

on r

ange

300m

out

door

, 30m

indo

or

Fre

quen

cy 2.4

GH

z IS

M

Sec

urity

Str

ong

encr

yptio

n, n

o op

en a

cces

s

Cos

tA

dapt

er 1

30€, b

ase

stat

ion

230€

Ava

ilabi

lity

Sev

eral

pro

duct

s fr

om d

iffer

ent

vend

ors

Con

nect

ion

set-

up ti

me

10 m

s bo

unde

d la

tenc

y

Qua

lity

of S

ervi

ceU

p to

8 s

trea

ms

A/V

, up

to 8

voi

ce

stre

ams,

prio

ritie

s, b

est-

effo

rt

Man

agea

bilit

yLi

ke D

EC

T &

802

-LA

Ns

Spe

cial

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anta

ges/

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adva

ntag

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dvan

tage

: ext

ende

d Q

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uppo

rt,

host

/clie

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nd p

eer/

peer

, pow

er

savi

ng, s

ecur

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vant

age:

futu

re u

ncer

tain

due

to

DE

CT

-onl

y de

vice

s pl

us

802.

11a/

b fo

r da

ta

Page 110: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

ng. J

oche

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ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

110

RF

Con

trol

lers

–IS

M b

ands

Dat

a ra

te Typ

. up

to 1

15 k

bit/s

(se

rial

inte

rfac

e)

Tra

nsm

issi

on r

ange

5-10

0 m

, dep

endi

ng o

n po

wer

(ty

p.

10-5

00 m

W)

Fre

quen

cy Typ

. 27

(EU

, US

), 3

15 (

US

), 4

18

(EU

), 4

26 (

Japa

n), 4

33 (

EU

), 8

68

(EU

), 9

15 (

US

) M

Hz

(dep

endi

ng o

n re

gula

tions

)

Sec

urity

Som

e pr

oduc

ts w

ith a

dded

pr

oces

sors

Cos

tC

heap

: 10€

-50€

Ava

ilabi

lity

Man

y pr

oduc

ts, m

any

vend

ors

Con

nect

ion

set-

up ti

me

N/A

Qua

lity

of S

ervi

ceno

ne

Man

agea

bilit

yV

ery

sim

ple,

sam

e as

ser

ial

inte

rfac

e

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cial

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anta

ges/

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adva

ntag

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dvan

tage

: ver

y lo

w c

ost,

larg

e ex

perie

nce,

hig

h vo

lum

e av

aila

ble

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adva

ntag

e: n

o Q

oS, c

row

ded

ISM

ban

ds (

part

icul

arly

27

and

433

MH

z), t

yp. n

o M

ediu

m A

cces

s C

ontr

ol, 4

18 M

Hz

expe

rienc

es

inte

rfer

ence

with

TE

TR

A

Page 111: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

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oche

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ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

111

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (1

)

Dat

a ra

te Tra

nsm

issi

on o

f ID

onl

y (e

.g.,

48 b

it,

64kb

it, 1

Mbi

t)9.

6 –

115

kbit/

s

Tra

nsm

issi

on r

ange

Pas

sive

: up

to 3

mA

ctiv

e: u

p to

30-

100

mS

imul

tane

ous

dete

ctio

n of

up

to, e

.g.,

256

tags

, sca

nnin

g of

, e.g

., 40

tags

/s

Fre

quen

cy 125

kHz,

13.

56 M

Hz,

433

MH

z, 2

.4 G

Hz,

5.

8 G

Hz

and

man

y ot

hers

Sec

urity

App

licat

ion

depe

nden

t, ty

p. n

o cr

ypt.

on

RF

ID d

evic

e

Cos

tV

ery

chea

p ta

gs, d

own

to 1€ (

pass

ive)

Ava

ilabi

lity

Man

y pr

oduc

ts, m

any

vend

ors

Con

nect

ion

set-

up ti

me

Dep

ends

on

prod

uct/m

ediu

m a

cces

s sc

hem

e (t

yp. 2

ms

per

devi

ce)

Qua

lity

of S

ervi

ceno

ne

Man

agea

bilit

yV

ery

sim

ple,

sam

e as

ser

ial i

nter

face

Spe

cial

Adv

anta

ges/

Dis

adva

ntag

esA

dvan

tage

: ext

rem

ely

low

cos

t, la

rge

expe

rienc

e, h

igh

volu

me

avai

labl

e, n

o po

wer

for

pass

ive

RF

IDs

need

ed, l

arge

va

riety

of p

rodu

cts,

rel

ativ

e sp

eeds

up

to

300

km/h

, bro

ad te

mp.

ran

geD

isad

vant

age:

no

QoS

, sim

ple

deni

al o

f se

rvic

e, c

row

ded

ISM

ban

ds, t

yp. o

ne-

way

(ac

tivat

ion/

tran

smis

sion

of I

D)

Page 112: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

112

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (2

)

Fun

ctio

n Sta

ndar

d: In

res

pons

e to

a r

adio

inte

rrog

atio

n si

gnal

from

a r

eade

r (b

ase

stat

ion)

the

RF

ID ta

gs tr

ansm

it th

eir

ID

Enh

ance

d: a

dditi

onal

ly d

ata

can

be s

ent t

o th

e ta

gs, d

iffer

ent m

edia

acc

ess

sche

mes

(co

llisi

on a

void

ance

)

Fea

ture

s No

line-

of s

ight

req

uire

d (c

ompa

red

to, e

.g.,

lase

r sc

anne

rs)

RF

ID ta

gs w

ithst

and

diffi

cult

envi

ronm

enta

l con

ditio

ns (

sunl

ight

, col

d, fr

ost,

dirt

etc

.)

Pro

duct

s av

aila

ble

with

rea

d/w

rite

mem

ory,

sm

art-

card

cap

abili

ties

Cat

egor

ies

Pas

sive

RF

ID: o

pera

ting

pow

er c

omes

from

the

read

er o

ver

the

air

whi

ch is

fe

asib

le u

p to

dis

tanc

es o

f 3 m

, low

pric

e (1€)

Act

ive

RF

ID: b

atte

ry p

ower

ed, d

ista

nces

up

to 1

00 m

Page 113: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

113

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (3

)

App

licat

ions

Tot

al a

sset

vis

ibili

ty: t

rack

ing

of g

oods

dur

ing

man

ufac

turin

g, lo

caliz

atio

n of

pa

llets

, goo

ds e

tc.

Loya

lty c

ards

: cus

tom

ers

use

RF

ID ta

gs fo

r pa

ymen

t at,

e.g.

, gas

stat

ions

, co

llect

ion

of b

uyin

g pa

ttern

s

Aut

omat

ed to

ll co

llect

ion:

RF

IDs

mou

nted

in w

inds

hiel

ds a

llow

com

mut

ers

to d

rive

thro

ugh

toll

plaz

as w

ithou

t sto

ppin

g

Oth

ers:

acc

ess

cont

rol,

anim

al id

entif

icat

ion,

trac

king

of h

azar

dous

m

ater

ial,

inve

ntor

y co

ntro

l, w

areh

ouse

man

agem

ent,

...

Loca

l Pos

ition

ing

Sys

tem

sG

PS

use

less

indo

ors

or u

nder

grou

nd, p

robl

emat

ic in

citi

es w

ith h

igh

build

ings

RF

ID ta

gs tr

ansm

it si

gnal

s, r

ecei

vers

est

imat

e th

e ta

g lo

catio

n by

m

easu

ring

the

sign

al‘s

tim

e of

flig

ht

Page 114: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

114

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (4

)

Sec

urity D

enia

l-of-

Ser

vice

atta

cks

are

alw

ays

poss

ible

In

terf

eren

ce o

f the

wire

less

tran

smis

sion

, shi

eldi

ng o

f tra

nsce

iver

s

IDs

via

man

ufac

turin

g or

one

tim

e pr

ogra

mm

ing

Key

exc

hang

e vi

a, e

.g.,

RS

A p

ossi

ble,

enc

rypt

ion

via,

e.g

., A

ES

Fut

ure

Tre

nds

RT

LS: R

eal-T

ime

Loca

ting

Sys

tem

–bi

g ef

fort

s to

mak

e to

tal a

sset

vis

ibili

ty

com

e tr

ue

Inte

grat

ion

of R

FID

tech

nolo

gy in

to th

e m

anuf

actu

ring,

dis

trib

utio

n an

d lo

gist

ics

chai

n

Cre

atio

n of

„el

ectr

onic

man

ifest

s“ a

t ite

m o

r pa

ckag

e le

vel (

embe

dded

in

expe

nsiv

e pa

ssiv

e R

FID

tags

)3D

trac

king

of c

hild

ren,

pat

ient

s

Page 115: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

115

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (5

)

Dev

ices

and

Com

pani

esA

XC

ES

S In

c., w

ww

.axc

essi

nc.c

om

Che

ckpo

int S

yste

ms

Gro

up, w

ww

.che

ckpo

ints

yste

ms.

com

GE

MP

LUS

, ww

w.g

empl

us.c

om/a

pp/s

mar

t_tr

acki

ng

Inte

rmec

/Inte

llita

g, w

ww

.inte

rmec

.com

I-R

ay T

echn

olog

ies,

ww

w.i-

ray.

com

RF

Cod

e, w

ww

.rfc

ode.

com

Tex

as In

stru

men

ts, w

ww

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fid.c

om/id

Whe

reN

et, w

ww

.whe

rene

t.com

Wire

less

Mou

ntai

n, w

ww

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m

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ww

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com

Onl

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sm

all s

elec

tion…

Page 116: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

116

RF

ID –

Rad

io F

requ

ency

Iden

tific

atio

n (6

)

Exa

mpl

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rodu

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nter

mec

RF

ID U

HF

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rR

ead

rang

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m

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nal

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anni

ng o

f 40

tags

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rega

rdle

ss

of th

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mbe

r of

tags

with

in th

e re

adin

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ense

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5 M

Hz,

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quen

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oppi

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Rea

d: 8

byt

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ms

Writ

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ms

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mpl

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ount

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at 3

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Page 117: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

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f. D

r.-I

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ttp://

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w.jo

chen

schi

ller.

de/

MC

SS

027.

117

RF

ID –

Rad

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requ

ency

Iden

tific

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n (7

)

Rel

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mer

ican

Nat

iona

l Sta

ndar

ds In

stitu

teA

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I, w

ww

.ans

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f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

118

RF

ID –

Rad

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requ

ency

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tific

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n (8

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Page 119: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

119

ISM

ban

d in

terf

eren

ce

Man

y so

urce

s of

inte

rfer

ence

Mic

row

ave

oven

s, m

icro

wav

e lig

htni

ng

802.

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ome

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Unl

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met

ropo

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a ne

twor

ks

Leve

ls o

f int

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: int

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renc

e ac

ts li

ke n

oise

Spr

ead

spec

trum

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s to

min

imiz

e th

is

FE

C/in

terle

avin

g tr

ies

to c

orre

ct

MA

C la

yer:

alg

orith

ms

not h

arm

oniz

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.g.,

Blu

etoo

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ight

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Page 120: Mobile Communications Chapter 7: Wireless LANs · terminal with access mechanisms to the wireless medium and radio contact to the access point Basic Service Set (BSS) group of stations

Pro

f. D

r.-I

ng. J

oche

nS

chill

er, h

ttp://

ww

w.jo

chen

schi

ller.

de/

MC

SS

027.

120

Blu

etoo

th m

ay a

ct li

ke a

rog

ue m

embe

r of

the

802.

11 n

etw

ork

Doe

s no

t kno

w a

nyth

ing

abou

t gap

s, in

ter

fram

e sp

acin

g et

c.

IEE

E 8

02.1

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disc

usse

s th

ese

prob

lem

sP

ropo

sal:

Ada

ptiv

e F

requ

ency

Hop

ping

a no

n-co

llabo

rativ

e C

oexi

sten

ce M

echa

nism

Rea

l effe

cts?

Man

y di

ffere

nt o

pini

ons,

pub

licat

ions

, tes

ts, f

orm

ulae

, …R

esul

ts fr

om c

ompl

ete

brea

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n to

alm

ost n

o ef

fect

Blu

etoo

th (

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SS

) se

ems

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e ro

bust

than

802

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(D

SS

S)

802.

11 v

s.(?

) 80

2.15

/Blu

etoo

th

t

f [M

Hz]

2402

2480

802.

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3 ch

anne

ls(s

epar

ated

by

inst

alla

tion)

ACK

DIFS

DIFS

SIFS

1000

byt

e

SIFS

DIFS

500

byte

ACK

DIFS

500

byte

SIFSACK

DIFS

500

byte

DIFS

100

byte

SIFSACK

DIFS10

0by

te

SIFSACK

DIFS

100

byte

SIFSACK

DIFS

100

byte

SIFSACK

DIFS

100

byte

SIFSACK

802.

15.1

79

cha

nnel

s(s

epar

ated

by

hopp

ing

patte

rn)