G-LII 101 GPRS Principle-20080325-A-2.0

8/9/2019 G-LII 101 GPRS Principle-20080325-A-2.0

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HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

OMQ000001 GPRSPrinciple

ISSUE 2.0


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e 2

GPRS principle is the basic part of the whole GPRS

system and the succeeding products learning. This slide

will help us to understand the GPRS system networkingand wireless subsystem etc.


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%e&e'ence(

GPRS principle

31025698 - M900/M1800 PCU

Technical Manual-!3"35#

GPRS pr$%$c$l) 0$*0

) 0+*+

GSM pr$%$c$l

) 0-*

) 0-


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e +

Up$n c$&ple%i$n $' %hi(

c$ur(e) *$u +ill ,e a,le %$

) now the G"%S (/(tem (t'uctu'e

) De(c'ie the G"%S im1o'tant

inte'&ace(

) Unde'(tand the G"%S channe!

(t'uctu'e(

) a(te' the G"%S 'e!e3ant nume'in#


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Chapter 1Cha

pter 1 GPRS System StructureGPRS S

ystem Structure

Chapter 2Chapter 2 GPRS Network Interfaces & ProtocolsGPRS Network Interfaces & Protocols

Chapter 3Chapter 3 GPRS Wireless SusystemGPRS Wireless Susystem

Chapter !Chapter ! GPRS Numerin"GPRS Numerin"

Chapter #Chapter # GPRS $oility $ana"ement %G$$GPRS $oility $ana"ement %G$$


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GS De3e!o1ment E3o!ution

57.6kbps

115 kbps

384kbps

2Mbps

GSM

HSCSD

GPRS

EDGE

IMT-2000

9.6 kbps

2G

2'#G

3G


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What i( G"%S and EDGE6

.,,reia%i$n $' General Pace% Rai$ Serice"

GPRS i( an en-%$-en pace% (+i%chin %echn$l$*

pr$ie $n %he ,a(i( $' GSM %echn$l$*"

% ha( &uch in%erac%ie (erice( +i%h %he e4i(%in GSMcircui% (+i%chin (*(%e&"

GPRS (upp$r%( +irele(( acce(( ra%e $' up %$ 11"2,p("

7G7 7nhance a%aRa%e( '$r GSM7$lu%i$n#

) EG"%S 77nhanced GPRS8

9 EG"%S (u11o't( wi'e!e(( acce(( 'ate o& u1 to +5$.*1(.

) ECSD 77nhanced CS, Enhanced HSCSD:Hi#h S1eed Ci'cuit Switched

Data8


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e

Gf

GiGn

Gb

Gc

Gp

Gs

MSC/!R

MS "SS T#$nternet

%m

Gr

&!R

'ther P!M(

SGS(

Gd

SM)SCSMS)GMSC

SMS)$*MSC

GGS(

#$R

SGS(

Gn

+R

()$*++N*

IS+N*

,thernet- etc

"G

GPRSbackbone

GGS( , .- T#

Gi

CGMS "SS

%m

G"%S (/(tem (t'uctu'e

+R

Gb

SS.


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e ;

G"%S S

Cla(( .)The S i( attached to oth G"%S and othe' GS (e'3ice(

and the S (u11o't( (imu!taneou( o1e'ation o& G"%S and

othe' GS (e'3ice(.Cla((

)The S i( attached on G"%S netwo'< and GS netwo'SS (ide8 u1#'ade to G"%S

p"ra4e SC software (44 PCp"ra4e)S software


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G"%S7>SS (ide8 u1#'ade to EDGE

p"ra4e SC software p"ra4e PC softwarep"ra4e)S softwarean4har4ware0 new ,+G, )R5

,+G,

)R5


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=unction( o& SGSN

;e%+$r acce(( c$n%r$l MS (ie#) Authentication

) >i!!in# in&o'mation co!!ection

) IEI checG

G ena,le( %he '$ll$+in pr$%$c$l( nece((ar* '$r

in%er+$rin ,e%+een $pera%$r(

) Secu'it/ 1'otoco!B I"Sec and 'ewa!! a'e 'ecommended

) %outin# 1'otoco!B >G" i( 'ecommended

) >i!!in# 1'otoco!B dete'mined / the o1e'ato'( with ne#otiation

>G mi#ht e needed in co!!ectin# i!!in# in&o'mation

% i( n$r&all* ,a(e $n r$u%er(

% can ,e c$n=ure in c$&,ina%i$n +i%h GGS;


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=unction( o& SC?L%

When Gs interface is installed, MSC/VLR can support

,stalishment an4 maintenance of the association etween SGSN an4 $SC*6R'

GPRS comine4 moility mana"ement proce4ure'

Combined $MS$/GPRS attachment/detachment.

Combined location area/routing area updating.

Circuit pa"in" coor4ination function'

)he wireless resource usa"e can e "reatly impro7e4'


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=unction( o& SS:GSC?SS:IWSC

(fter G4 interface is installe4- short messa"es can e sent 7ia GPRS- which re4uces the

occupation on S+CC8 an4 cuts 4own the influence on 7oice ser7ices y S$S ser7ices'

)he operator can select to sen4 S$S 7ia $SC or SGSN'


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Chapter 1Chapter 1 GPRS System StructureGPRS System Structure






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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e 2;

Netwo'< inte'&ace t/1e(

GPRSbackbone network

SGS(SGS(

SGS(SGS(

GGS(GGS(Gn

IP interface

SS7 interface

BSS MSCSMS-

GMSC

AUm

PDP network

(IP/X.!"

Gi

TE

MT

MS

#$R

G%

Gr

G&

Gc

Gb


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Data t'an(mi((ion 1!ane

M.C Meia .cce(( C$n%r$l R:C Rai$ :in C$n%r$l ::C :$ical :in C$n%r$l

"SSGP: "SS GPRS Protocol

S(1CP: Sub)(etwork 1ependency Con0ergence Protocol

GTP: GPRS Tunneling Protocol

Application

IP/X.25 IP/X.25 IP/X.25

SNDCP G'P

LLC LLC UDP/TCP UDP/TCP

RLC BSSGP BSSGP IP IP

MAC MACNetwo!Se"ice Netwo!

Se"iceL2 L2

L2 #MAC$

P%&'ical

La&e

P%&'ical

La&e

P%&'ical

La&e

P%&'ical

La&e

P%&'ical

La&e

P%&'ical

La&e

P%&'ical

La&e

MS BSS SGS GGS

ela&

ela&

SNDCPG'P

Um Gb Gn Gi

RLC


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S:SGSN (i#na!in# 1!ane

GMM GPRS M$,ili%* Manae&en%

SM Se((i$n Manae&en%

MS BSS SGSN

BSSGP

GMM/SM

LLC

RLC

MAC

GSM R(

GMM/SM

LLC

BSSGP

L)*i'

Um Gb

Netwo!Se"ice

RLC

MAC

GSM R( L)*i'

Netwo!Se"ice

Re)a*ela&


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=unction( o& 1h/(ica! !a/e'

Ph*(ical la*er c$n(i(%( $' R> (u,-la*er an ph*(ical

lin (u,-la*er

) R> (u,-la*er

9 modu!ation and demodu!ation.

) Ph*(ical (u,-la*er9 e''o' chec


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e $$

=unction( o& %LC?AC

R:C/M.C la*er (erice

) The R:C/M.C 'unc%i$n (upp$r%( %+$ &$e( $' $pera%i$n

9 Unac


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HUAWEI TECHNOLOGIES CO., LTD. Huawei Condentia! "a#e $+

NS !a/e' denition

The ;e%+$r Serice per'$r&( %he %ran(p$r% $' ;SSU(Serice a%a Uni% # ,e%+een %he SGS; an SS"

The ;e%+$r Serice en%i%* i( c$&p$(e $' %he Su,-

;e%+$r Serice an %he ;e%+$r Serice C$n%r$l"

(etwork Ser0ice Control /

(etwork Ser0ice Control Protocol

Sub)(etwork Ser0ice /

Sub)(etwork Ser0ice Protocol

Network Ser7ice


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NS !a/e' com1o(ition

) The ;e%+$r Serice C$n%r$l

9 the 1ee':to:1ee' communication etween 'emote NS u(e' entitie(

i( 1e'&o'med o3e' >SSG" i'tua! Connection( 7>C(8.

9 A >C i( a 3i'tua! communication 1ath etween Netwo'< Se'3ice

u(e' 1ee' entitie(.

) The Su,-;e%+$r Serice9The Netwo'< Se'3ice Cont'o! 1ee' entitie( u(e the Su:Netwo'SSG"

The pri&ar* 'unc%i$n $' SSGP i( %$ pr$ie %he

rai$-rela%e) Q$S) an r$u%ein in'$r&a%i$n %ha%

i( re?uire %$ %ran(&i% u(er a%a ,e%+een a SS

an an SGS;"

) In the >SS, it act( a( an inte'&ace etween LLC &'ame( and

%LC?AC !oc


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SCCP

MTP2

MTP+

MTP2

MTP+

SCCP

G%

SGSN MSC/,LR

BSSAP- BSSAP-

L) L)

SGSN J SC?L% (i#na!in# 1!ane

G( in%er'ace i( %he $p%i$nal in%er'ace"

% a$p%( SS.P@ pr$%$c$l %$ ena,le c$&,ine &$,ili%* &anae&en% an

pain 'unc%i$n( ($ a( %$ i&pr$e %he e


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Netwo'< o1e'ation mode 7"a#in# co:o'dination8

Pain c$-$rina%i$n &ean( %ha% %he ne%+$r (en( pain &e((ae(

'$r circui%-(+i%che (erice( $n %he (a&e channel a( u(e '$r pace%-

(+i%che (erice() i"e") $n %he GPRS pain channel $r $n %he GPRS

%raAc channel) an %he MS nee( $nl* %$ &$ni%$r %ha% channel"

Mode Circuit PagingChannel

GPRS PagingChannel

Paging co-ordination

Net)or( *peration Mode

+

,a$(et ,aging Cannel ,a$(et ,aging Cannel .e"/G" intera$e i"

pre"ent all MSC-

originated paging o

G,RS-atta$ed MS" "all

go &ia te SGSN

CCC ,aging Cannel CCC ,aging Cannel

,a$(et 4ata Cannel Not %ppli$a!le


++CCC ,aging Cannel CCC ,aging Cannel No/G" intera$e i" not

pre"ent all MSC-

originated paging o

G,RS-atta$ed MS" "all

go &ia te % intera$e


+++

CCC ,aging Cannel ,a$(et ,aging Cannel

CCC ,aging Cannel CCC ,aging Cannel


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"h/(ica! channe!

The (a&e a( in GSM

The (a&e 're?uenc*

The &$ula%i$n &$e

The (a&e TM. 'ra&e e=ni%i$n

The (a&e ,ur(% pul(e e=ni%i$n B

The i


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"ac


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Channe! a'e3iation

Pace% a%a TraAc Cannel Uplin - PTC/U Pace% a%a TraAc Cannel $+nlin - PTC/ Pace% r$aca(%C$n%r$l Cannel - PCC Pace% C$&&$n C$n%r$l Cannel - PCCC Pace% eica%e C$n%r$l Channel - PCC Pace% Pain Cannel - PPC Pace% Ran$& .cce(( Cannel - PR.C Pace% .cce(( Gran% Cannel - P.GC Pace% ;$%i=ca%i$n Cannel - P;C Pace% .(($cia%e C$n%r$l Cannel - P.CC

Pace% Ti&in aance C$n%r$l Cannel Uplin -PTCC/U

Pace% Ti&in aance C$n%r$l Cannel $+nlin -

PTCC/


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"DTCH 7"ac


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">CCH 7"ac'oadca(t Cont'o!CHanne!8

The PCC ,r$aca(%(

para&e%er( u(e ,* %he MS %$

acce(( %he ne%+$r '$r pace%

%ran(&i((i$n $pera%i$n" The PCC al($ carrie( %he

in'$r&a%i$n %ran(&i%%e ia %he

CC %$ all$+ circui% (+i%chin

$pera%i$n") The S in G"%S attached mode monito'(

the ">CCH on!/, i& ">CCH i( a3ai!a!e,

othe'wi(e, the >CCH (ha!! e u(ed to'oadca(t in&o'mation &o' 1ac


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"DCCH 7"ac


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"DCCH 7"ac


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Comination( o& 1ac: P"CC&


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a11in# o& 1ac= ";?= "-= "E= "= ";;7.


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u!ti:&'ame (t'uctu'e com1a'i(on et. "Sand CS

P"CC&


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"ac


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"ac


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A!!ocation o& wi'e!e(( 1ac " "B "D "E " ";? ";;"?

"; "- "5 "> " "B "D "E " ";? ";;"?

"; "- "5 "> " "B "D "E " ";? ";;"?

$S3$S2

)S 9

)S 1

)S 2

$S1


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T'an(mi((ion 1'inci1!e o& data 1ac


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%LC?AC !oc< (t'uctu'e 7G"%S8

R:C/M.C a%a ,l$c

)An %LC?AC !oc< containin# an %LC data !oc< ma/ e encoded u(in#

an/ o& the a3ai!a!e channe! codin# (cheme( CS:-, CS:2, CS:$, o' CS:+.

%LC?AC !oc


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%LC?AC !oc< (t'uctu'e 7EG"%S8

R*C#MAC bloc+

RLC6M%C eader RLC data !lo$( 1 RLC data !lo$( 2

/$onditional

RC*$(C control lock

Similar to GPRS

R*C#MAC bloc+

M%C eader RLC6M%C $ontrol !lo$(

RC*$(C 4ata lock

+issimilar to GPRS


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"DCH codin# mode

:PS;G$S;


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+ownlink- ! )S- $CS0


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edium acce(( mode(

Uplin re($urce all$ca%i$n &$e) D/namic a!!ocationB S dete'mine( the !oc


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S mu!ti:TS ai!it/

C$ncep% $' MS &ul%i-TS a,ili%*) DenitionB the mu!ti:TS ai!it/ !e3e! i( -:2; the i##e' the !e3e!,

the (t'on#e' the mu!ti:TS ai!it/.

) %hree ele&en%(1 HI R4 @ T4 HI Su

9 % maimum 'ecei3in# TS nume' 7down!in< TS8

9Tmaimum t'an(mi((ion TS nume' 7u1!in< TS8

9 Summaimum tota! TS nume'

SS all$ca%e( re($urce( acc$rin %$ %he MS &ul%i-

TS a,ili%*) re?ue(%e Q$S an curren% re($urce

c$n=ura%i$n"

" !


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"owe' cont'o!

P$+er c$n%r$l can i&pr$e %he (pec%ru& u(ae an (*(%e&

capaci%* a( +ell a( reuce MS p$+er c$n(u&p%i$n"

.( %here i( n$ c$n%inu$u( ,i-irec%i$nal c$nnec%i$n in %he pace%

a%a %ran(&i((i$n pr$ce(() GPRS p$+er c$n%r$l i( er* c$&plica%e"

Uplin p$+er c$n%r$linclue( $pen-l$$p an cl$(e-l$$p p$+er

c$n%r$l" .,$u% $+nlin p$+erc$n%r$l) %here i( n$ (peci=c e=ni%i$n in

pr$%$c$l" % lie( $n %he TS an i%( al$ri%h& nee( in'$r&a%i$n

a,$u% $+nlin) ($ $+nlin p$+er c$n%r$l nee( MS (en( channel

?uali%* rep$r%( %$ TS"

N t < t ! d


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Netwo'< cont'o! mode(

urin %he ne%+$r c$n%r$lle cell re-(elec%i$n) %hene%+$r &a* re?ue(% &ea(ure&en% rep$r%( 'r$& %he

MS an c$n%r$l i%( cell re-(elec%i$n" ence) %hree %*pe(

$' &$e are e=ne a( '$ll$+() ;C0B No'ma! S cont'o!(. The S (ha!! 1e'&o'm autonomou(

ce!! 'e:(e!ection.) ;C1B S cont'o! with mea(u'ement 'e1o't(. The S (ha!!

(end mea(u'ement 'e1o't( to the netwo'


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CGI


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CGI

ocation (rea I4entification

$CC $NC (C CI

Cell Gloal I4entification

$CC 6$obile Country Code7: $t consists of 5 digits .

+or e2ample: The MCC of China is H>B?H

$NC 6$obile Network Code7: $t consists of - digits .

+or e2ample: The M(C of China Mobile is H??H

(C 6ocation (rea Code7: $t is a two bytes "C1 code 6he27.

The 0alue ???? and ++++ is in0alid.

CI 6Cell Identity7: This code uses two bytes "C1 code 6he27 to identify the

radio cells within a !3$.

+or e2ample : >B?)??)??;;)???;

%AI


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%AI

R$u%in area i( %he (u,-(e% $' %he l$ca%i$n area" n (pecial

ca(e() %he %+$ area( are e?ual The ii(i$n $' %he r$u%in area i( rela%e +i%h %raAc

i(%ri,u%i$n an SGS; pr$ce((in a,ili%*

ocation (rea I4entification

$CC $NC (C R(C

Routin" (rea I4entification

>SIC


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>SIC

NCC CC

ase Station I4entification Color Co4e

NCC6P!M( Network Color Code7: $t comprises 5 bits.

$t allows 0arious neighboring P!M(s to be distinguished.

CC6TS Color Code7: $t comprises 5 bits.

$t allows distinctions between different radio freAuency channelsusing the

same freAuency in neighboring cells.


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G conce1t


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G conce1t

R$u%in area (u,(e% $' l$ca%i$n area M$,ili%* &anae&en% en%i%ie( SGS;) :R an

MS GMM c$n%e4%

) S identication? S !ocation in&o'mation 7'outin#a'ea ID, ce!! ID8

) Cu''ent (e'3ice SGSN add'e((, L% nume' 7S on!/8) Enc'/1tion a!#o'ithm and authentication 1a'amete') G (tatu(

GMM (%a%u() Id!eB G contet i( not e(ta!i(hed S i( not

'eacha!e.) Stand/B G contet i( e(ta!i(hed S can 'ecei3e

1a#in# ut cannot im1!ement data t'an(mi((ion.) %ead/B S can im1!ement data t'an(mi((ion.


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G (tatu( mode!(

$mplicit 1etach

or

Cancel !ocation

GPRS 3ttach

P1%

reception

GPRS 1etachor

Cancel !ocation

MM State Model of SGS(

$1!#

R#31I

ST3(1"I

R#31I timer e2piryor

+orce to ST3(1"Ior

3bnormal R!C condition

P1%

transmission

GPRS 3ttach

R#31I timer e2piry

or+orce to ST3(1"I

GPRS 1etach

MM State Model of MS

$1!#

R#31I

ST3(1"I

ao' &unction( o& G


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ao' &unction( o& G

General 'unc%i$n() GPRS a%%ach&en% contet i( e(ta!i(hed (tatu( i( chan#ed to

'ead/.) GPRS e%ach&en% contet i( de!eted (tatu( i( chan#ed to id!e.

9 O'i#inated / S o' netwo'< (ide.) Securi%* 'unc%i$nauthentication, enc'/1tion, identication chec


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Coo1e'ation etween G and

O,Jec%ie() To im1'o3e the eecti3e u(a#e o& wi'e!e(( 'e(ou'ce(

) To 'educe the netwo'< (i#na!in# t'a@c

Pre-c$ni%i$n

)SGSN and SC?L% (u11o't G( inte'&ace

>unc%i$n(

) Comined ISI?G"%S attachment

) Comined ISI?G"%S detachment

) Comined 'outin# a'ea?!ocation a'ea u1datin# 7inc!udin#

1e'iodica!8

Summa'/


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Summa'/

GPRS S*(%e& S%ruc%ure

GPRS ;e%+$r n%er'ace( K

Pr$%$c$l(

GPRS Eirele(( Su,(*(%e&

GPRS ;u&,erin

GPRS M$,ili%* Manae&en% GMM#


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G-LII 101 GPRS Principle-20080325-A-2.0