3G Training Drivporte Test r

7/25/2019 3G Training Drivporte Test r

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3G Training


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oTerminologieso 3G Introduction and overviewo 3G Structure and Processo

3G Power Controlo 3G Mobility Managemento 3G Call Process Managemento 3G Radio Interface Channelo 3G Handovero 3G !timi"ation Conce!t

Content


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Terminologies


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Symbol Explanation - 1


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RTWP

RT#P can be caused by bad weather$feeder bro%en$ !ort feeder bro%en


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Symbol Explanation -


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Time Propagation !TP"

TP use for chec%ing overshoot sites & unit TP e'uals to (3)m in distance


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3G #ntro$%&tion an$

'(er(ie)


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Reason *or $e(eloping3G Increase Ca!acity *evelo!ment Rate of mobile comm *emands on Multimedia


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+i,eren&e bet)een WC+. an$GS GS

WC+.+do!ts cellular networ% structure

and fre'uency !lanning to guarantee

intra,inter-fre'uency interference

.sers su!!orted can be calculated

from carriers and timeslots if the

interference meets the re'uirements/

Provides voice service

Reali"e &0& fre'uency reuse

The ca!acity !er #C*M+ cell is

1soft2 for it is related to environment

and neighbor cell interference/

Su!!orts multi!le services with

dierent s!eed rate and 4oS$ and

each service has dierent coverage

range/


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WC+. ST./+.R+E0'T#'/


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Page &5

Tra& &annels$i,erent %sers areassigne$ %ni%e &o$ean$ transmitte$ o(erte same 7re%en&yban$8 7or example8WC+. an$ C+.2999

Tra& &annels $i,erent 7re%en&yban$s are allo&ate$ to $i,erent%sers

Tra&&annels $i,erent timeslots are allo&ate$ to $i,erent%sers8 7or example

*re6%e

n&y

Time

Po)er

*re6%

en&y

Time

Po)er

*re6

%en&y

Time

Po)er

*+.

T+.

C+.

2ser

2ser

2ser

2ser

2ser

2ser

%ltiple.&&essTe&nologyan$+%plexTe&nology


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3G So7t Capa&ity

Ca!acity Coverage 4oS

6they will give aect to each other7


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3G Capa&ity


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Page (8

:oS Type

Re

al-

tim

e

cat

eg

ory

Conversation

al

It is necessary to maintain the time relationshi!

between the information entities in the stream/

Small time delay tolerance$ re'uiring data rate

symmetry

9oice service$

video!hone

Streaming

Ty!ically unidirectional services$ high

re'uirements on error tolerance$ high

re'uirements on data rate

Streaming

multimedia

:o

n

rea

l-

time

Interactive

Re'uest-res!onse mode$ data integrity must be

maintained/ High re'uirements on error

tolerance$ low re'uirements on time delay

tolerance

#eb !age

browse$

networ% game

*ata integrity should be maintained/ Small delay

restriction$ re'uiring correct transmission

;ac%ground

download of


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3G Str%&t%re an$

Pro&ess


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Page ((

TS /et)or;

Iu-;C

R:C

R:C

:ode;

:ode;

:ode;

CS Service toMSC

PS Service toSGSN=>GGSN

.< .TR+: C:

.u Iu

Iu-CS

Iu-PS

Iur

Iub

Iub

Iub


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3G pro&essing +atatransmit

Source Coding

Channel Coding

S!reading

Scrambling Modulation

Transmit


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So%r&e &o$ing

Increase T= ciency +nalog to *igital Converter Performed in .< PS no need source coding/ #hy?


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&annel &o$ing

Ma%e T= More Reliable by !ut moreredundant bits

.se for overcoming

Interference,@ading .se Interleaving for serious fading


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sprea$ing

Increase the Ca!ability to vercomeInterference


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s&rambling

Ma%e T= more secureA


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mo$%lation

*igital to signal converter

B is wave-length

#ave-length aecting antenna dimension

The more high fre' 6f7$ antenna dimensionwill be smaller


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Te Wole Pro&ess


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3G Po)er Control


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te


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Wy po)er &ontrol

T= !ower cannot be set to be as high as !ossible/It will waste the !ower and #ill cause e=trainterference to other users/

In #C*M+ system$


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po)er &ontrol Type


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3G obility

anagement


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obility anagement


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#$le mo$e

.TR+: doesnDt %now anything about .< butCR< %nows +C,R+C of .c volume is high7

Paging only sent to this cell

CellF@+CH 6&88 m+ &8 m+7 RRC Connection active

.TR+: allocated Common Channel .se for signalling with PS service 6ow data Rate$ Tra>c volume is not too high7

CellFPCH

RRC Connection active

.< connected but no data transmit

.< only monitor PICH

.R+FPCH .R+ .TR+: Registration +rea Change state from CellFPCH to CellF@+CH 6cell u!date7 that ha!!ens too fast

.R+ deJned from several dierent of :ode;s/

There is a threshold timer to decide the state changes from CellFPCH to CellF@+CH6if cellFPCH ha!!ens for = time$ then change to .R+FPCH7

#hy have to change to .R+FPCH? because too many changes from CellFPCH to CellF@+CH are not good for system ca!acity


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3G Call Pro&ess

anagement


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RRC Conne&tion

R+; Release will trigger Iu Release


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3G ra$io inter7a&e&annel


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a>or Cannel

ogical Channel Control Channel

Service Channel 6Tra>c7

Trans!ort Channel *edicated Channel

Common Channel

Physical Channel

.,* Physical Channel *edicated carrier !hase

code 69S@$ SC7


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Cannel example - 1


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Cannel example - 2


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Pysi&al &annel


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Pysi&al &annel


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+ Pysi&al &annel


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3G ra$io inter7a&eproto&ol


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#nter7a&e proto&ol


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mts proto&ol


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mts proto&ol type


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R/ ? .ppli&ation proto&ol


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3G @an$o(er


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@an$o(er

Intra-@re'uency 6SH7 Soft H

Softer H

Hard H

Inter-@re'uency 6I@H7 Inter-R+T @re'uency 6IR+TH,ISH7

3G to *CS

3G to GSM

So7t @an$o(er ?


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So7t @an$o(er ?!Conne&tion be7ore

+is&onne&tion"R/C/o$e


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So7ter @an$o(er ? !.Spe&ial Case o7 So7t

@an$o(er" R/C/o$e

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3G Training Drivporte Test r