GSM Training Materials for Skill Certificates-(E)GPRS Signaling Flow & Test

7/25/2019 GSM Training Materials for Skill Certificates-(E)GPRS Signaling Flow & Test

1/46

Internal Use Only

(E)GPRS Signaling Flow & Test

Suitable for staff with !" year wor# e$%eriene in 'TE after %robation

Issue by GS Prout Su%%ort *e%art+ent

GSMGSMTraining Materials forTraining Materials forSkill CertificatesSkill Certificates


2/46

Internal Use Only

Version Introduction

Version Date Writer Assessor Translator Amendment Records

V1.0 2009-01-14 Bo Zongun Z!eng "ao#"ou $!uai#%ang &ia'!i#(an Wenun

Wang "ang)an *one


3/46

Internal Use Only

+ourse ,ecties

To e /amiliar it! common 3(R$

signaling /lo

To e /amiliar it! 3(R$ test content

To master 3(R$ test tec!ni5ues


4/46

Internal Use Only

+ontents

A Brief Introduction to (E)GPRS Signaling

Main (E)GPRS Signaling Flows

(E)GPRS Field Test

Main (E)GPRSTest Signaling Flow


5/46

Internal Use Only

A Brie/ Introduction to 3(R$ $ignaling

(E)GPRS Signaling Protool Sta#

GPRS Protocol Stack ofData

Transission Platfor


6/46

Internal Use Only


( (E)GPRS Signaling Protool Sta#

GPRS Protocol Stack of

!ontrol Platfor


7/46

Internal Use Only


($6 R7 rotocol

!)sical la)er can e diided into to su-la)ers ) /unction8!)sical R7

su-la)er and !)sical lin: su-la)er;

!)sical R7 su-la)er is used to modulate t!e it stream sent /rom uer

!)sical su-la)er and to demodulate t!e ae/orm coming /rom eer la)er6A+ rotocol

R=+>6A+ la)er is a loer-la)er data lin: la)er. T!e /unctions /or R=+>6A+ la)er

are as /ollos;

6A+

1. roide e//ectie multile?ing o/ @=>D= data and control signaling.

2. roide contention solution# including con/lict detection recoer)# /or c!annelaccess initiated ) 6$.

. roide access sc!eduling# including t!e $ 5ueuing# /or t!e c!annel accessterminated ) 6$.

4. riorit) rocessing.

R=+

1. roide inter/ace rimities /or transmitting ==+-D@ eteen ==+ and 6A+.

2. $egment ==+-D@ and reorgani'e it into R=+ data loc:.

. T!e reerse error correction rocess /or t!e selectie retransmission o/ incorrect data.


9/46

Internal Use Only


==+ rotocol

==+ la)er# i.e. =ogical =in: +ontrol ==+3 la)er# is used to transmit ac:et

data eteen 6$ and $($*.

7unctions o/ ==+;

1. roide one or more logical lin: connections t!roug! D=+I.

2. $e5uence control# guaranteeing t!e se5uence o/ /rames on logical lin:.

. +!ec: transmission# /ormat and oeration errors on logical c!annels.

4. Recoer errors detected.

C. *oti/ication o/ unrecoerale errors.

. 7lo control.

E. ncr)tion


10/46

Internal Use Only


$*D+ $u-*etor: Deendent +onergence rotocol 3

7unctions o/ $*D+

1. 6ultile? man) Dse?tract user data and rotocol control in/ormation6A+.

*$ *etor: $erice =a)er3

7unctions o/ *$;

1. roide *$ $D@ transmission

2. roide netor: congestion indication. roide status indication# e.g. c!anges o/ usale transmission caacit)


12/46

Internal Use Only


Di//erent arts o/ *$ rotocol *$+trl 7unctions o/ *$ +ontrol la)er3

1. roide *$ $D@ transmission

2. =oad slitting

. *$V+ management# including loc:# unloc:# reset# and test.

7unctions o/ $*$ 7unctions o/ $u-netor: $erice3

1. roide t!e access to intermediate transmission netor:# i.e. *$V=

2. Transmit data se5uentiall) on *$-V+

. Detect and reort errors in rotocol# and errors suc! as /ailure o/

intermediate transmission netor:# e5uiment /ault# and lin: /ailure# etc.


13/46

Internal Use Only


(T (R$ Tunneling rotocol3 T!is rotocol suorts data and signaling transmission eteen t!e suorting nodes o/

(R$ ac:one netor:. All T D@ D need e encasulated ) (T.

@D>T+

T+ carries t!e (T D@ t!at need e suorted ) reliale data lin: e.g. G.2C3 in

(R$ ac:one netor:< @D carries t!e (T D@ t!at need not e suorted )

reliale data lin: e.g. I3. T+ roides /lo control and rotects (T D@ /rom

eing lost or damaged. @D rotects (T D@ /rom eing damaged.

I

It is a (R$ ac:one netor: rotocol alied to router user data and control

signaling. (R$ ac:one netor: as ased on I ersion 4 rotocol initiall)# and

ill use ersion /inall).


14/46

Internal Use Only

+ontents



(E)GPRS Field Test

Main (E)GPRS Test Signaling Flow


15/46

Internal Use Only

6ain 3(R$ $ignaling 7los

$ummar) o/ 6ain $ignaling 7losCategories Subcategories Signaling Flows

T,F Flow

-ess flow in PI

One.%hase -ess on ///0

Two.%hase -ess on ///0

One.%hase -ess on P///0

Two.%hase -ess on P///0

-ess flow in PTEstablish+ent of *1 T,F with U1 T,F

Establish+ent of U1 T,F with *1 T,F

-ess flow (initiate bynetwor# sie)

Paging flow

T,F trans+ission &release flow

U1 R1/ a#nowlege trans+ission

*1 R1/ a#nowlege trans+ission

SignalingFlow

G flow

-TT-/0*E-TT-/0

-uthentiation

R-U (intra SGS2!inter SGS2!intra R-)

S flowP*P ati3ation

P*P eati3ation


16/46

Internal Use Only


,ne-!ase Access onB++"

!ontention Solution

A/ter receiing @= assignment

message# 6$ must send t!ree R=+loc:s it! T==I. A/ter receiing

t!e /irst R=+ data loc:# netor:

ill resond it! A+HT

@=I*H A+H# in !ic! T==I

receiedJ s!ould e set. I/ t!e T==I

in t!e A+HT @=I*H A+H is

consistent it! t!e one o/ 6$# t!e

ireless resource /or t!is message

is assigned to t!e 6$. ,t!erise#

6$ s!ould ignore t!e message.


17/46

Internal Use Only


To-!ase Access on +++"

!ontention Solution

A/ter receiing t!e

second A+HT

@=I*H A$$I(*# 6$

ill comare t!e T==I

contained in t!e message

it! t!e one sent )

itsel/ in A+HT

R$,@R+ RF. I/ t!e

to T==Is are

consistent# t!e contention

solution is success/ul.


18/46

Internal Use Only


@lin: TB7 stalis!ment in T6

MS "etwork

Packet Downlink Assignent

R#!$MA! B#%!&


19/46

Internal Use Only


Donlin: TB7 stalis!ment in T6

MS "etwork

Packet 'link Assignent

R#!$MA! B#%!&('SF)

R#! DATA B#%!&

Packet Downlink A!&$"ack (!annel Re*uest)


20/46

Internal Use Only


aging 7los

MS "etwork

Packet !annel Re*uest

Packet Iediate Assignent

Packet Paging Resonse (##! frae)

PRA!+ or RA!+

PAG!+or AG!+

PA!!+

PP!+ or P!+PacketPaging Re*uest


21/46

Internal Use Only


@lin: Data Transmission

Packet 'link Ack$"ack

Data Block (!,-.)

Access and Assignent

MS BSS

PA!!+

PDT!+

Packet 'link Ack$"ackPA!!+

PA!!+

Data BlockPDT!+

Data BlockPDT!+

Data Block (last in send window)PDT!+

Data BlockPDT!+

Data BlockPDT!+

Data Block

final Packet Ack$"ack(FAI-/)PA!!+

##! PD'

SGS"

Packet !ontrol Ack


22/46

Internal Use Only


Donlin: Data Transmission

Packet Downlink Ack$"ack

MS "etwork

PA!!+

Packet Downlink AssignentPA!!+

PDT!+

PA!!+final Packet Ack$"ack

Data BlockPDT!+

Data BlockPDT!+

Data Block (olling)PDT!+

PDT!+Data Block

PDT!+

Data Block

Data Block

Data Block (last0 olling)PA!!+

Iediate AssignentAG!+

Packet Downlink Assignent

##! PD'

SGS"

PA!!+


23/46

Internal Use Only


Attac! 7lo 1; 6$ initiates attac!re5uest# i/ $($* cannotidenti/) -T6I$I# *e$($* ill initiateIdenti/ication Re5uest+2; At resent# $

serice s!ares t!e same

+1>+2 algorit!m as +$

serice. A comarison

eteen +2 and R?=ecan disla) t!ose cells

it! unreasonale

reselection arameters.

+on/licts eteen +$

serice and $ serice

s!ould e aoided during

t!e adustment to

unreasonale arameters.

+R"; In $ serice#

+R" in (66

$TA*DB% state

or:s onl) !en an

6$ is crossingrouting area and

location area< !ile

+R" in (66

RAD% state

or:s all t!e time.

+R,; T!is

arameter a//ects

ot! +$ serice and

$ serice greatl).

As adustment tot!is arameter tends

to cause c!anges to

cell load and !ence

generate side e//ect#

t!e adustment

s!ould e aoided

as muc! as ossile.

T ,; T!ese

to arameters can

aoid too /ast t!e

(R$ reselection#

ut t!e ste si'e istoo large# e.g. t!e

ste si'e is 10dBm

/or T# and 20s /or

T,# !ic! s!ould

e aid close

attention to during

adustment.


41/46

Internal Use Only

+ontents



(E)GPRS Field Test

Main (E)GPRS Test Signaling Flow

I t l U O l


42/46

Internal Use Only

3(R$ 7ield Test

-ttah &*etah

I t l U O l


43/46

Internal Use Only

3(R$ 7ield Test

P*P ati3e & eati3e

I t l U O l


44/46

Internal Use Only

3(R$ 7ield Test

R-U

Internal Use Only


45/46

Internal Use Only

3(R$ 7ield Test

FTP & Ping

Internal Use Only


46/46

Internal Use Only

Documents

GSM Training Materials for Skill Certificates-(E)GPRS Signaling Flow & Test