gsm training materials for skill certificates-(e)gprs signaling flow & test
TRANSCRIPT
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7/25/2019 GSM Training Materials for Skill Certificates-(E)GPRS Signaling Flow & Test
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(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
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Version Introduction
Version Date Writer Assessor Translator Amendment Records
V1.0 2009-01-14 Bo Zongun Z!eng "ao#"ou $!uai#%ang &ia'!i#(an Wenun
Wang "ang)an *one
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+ourse ,ecties
To e /amiliar it! common 3(R$
signaling /lo
To e /amiliar it! 3(R$ test content
To master 3(R$ test tec!ni5ues
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+ontents
A Brief Introduction to (E)GPRS Signaling
Main (E)GPRS Signaling Flows
(E)GPRS Field Test
Main (E)GPRSTest Signaling Flow
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A Brie/ Introduction to 3(R$ $ignaling
(E)GPRS Signaling Protool Sta#
GPRS Protocol Stack ofData
Transission Platfor
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A Brie/ Introduction to 3(R$ $ignaling
( (E)GPRS Signaling Protool Sta#
GPRS Protocol Stack of
!ontrol Platfor
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A Brie/ Introduction to 3(R$ $ignaling
($6 R7 rotocol
!)sical la)er can e diided into to su-la)ers ) /unction8!)sical R7
su-la)er and !)sical lin: su-la)er;
!)sical R7 su-la)er is used to modulate t!e it stream sent /rom uer
!)sical su-la)er and to demodulate t!e ae/orm coming /rom eer la)er6A+ rotocol
R=+>6A+ la)er is a loer-la)er data lin: la)er. T!e /unctions /or R=+>6A+ la)er
are as /ollos;
6A+
1. roide e//ectie multile?ing o/ @=>D= data and control signaling.
2. roide contention solution# including con/lict detection recoer)# /or c!annelaccess initiated ) 6$.
. 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. $egment ==+-D@ and reorgani'e it into R=+ data loc:.
. T!e reerse error correction rocess /or t!e selectie retransmission o/ incorrect data.
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A Brie/ Introduction to 3(R$ $ignaling
==+ rotocol
==+ la)er# i.e. =ogical =in: +ontrol ==+3 la)er# is used to transmit ac:et
data eteen 6$ and $($*.
7unctions o/ ==+;
1. roide one or more logical lin: connections t!roug! D=+I.
2. $e5uence control# guaranteeing t!e se5uence o/ /rames on logical lin:.
. +!ec: transmission# /ormat and oeration errors on logical c!annels.
4. Recoer errors detected.
C. *oti/ication o/ unrecoerale errors.
. 7lo control.
E. ncr)tion
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A Brie/ Introduction to 3(R$ $ignaling
$*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 *$ $D@ transmission
2. roide netor: congestion indication. roide status indication# e.g. c!anges o/ usale transmission caacit)
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A Brie/ Introduction to 3(R$ $ignaling
Di//erent arts o/ *$ 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 *$-V+
. Detect and reort errors in rotocol# and errors suc! as /ailure o/
intermediate transmission netor:# e5uiment /ault# and lin: /ailure# etc.
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A Brie/ Introduction to 3(R$ $ignaling
(T (R$ 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).
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+ontents
A Brief Introduction to (E)GPRS Signaling
Main (E)GPRS Signaling Flows
(E)GPRS Field Test
Main (E)GPRS Test Signaling Flow
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6ain 3(R$ $ignaling 7los
$ummar) o/ 6ain $ignaling 7losCategories Subcategories Signaling Flows
T,F Flow
-ess flow in PI
One.%hase -ess on ///0
Two.%hase -ess on ///0
One.%hase -ess on P///0
Two.%hase -ess on P///0
-ess flow in PTEstablish+ent of *1 T,F with U1 T,F
Establish+ent of U1 T,F with *1 T,F
-ess flow (initiate bynetwor# sie)
Paging flow
T,F trans+ission &release flow
U1 R1/ a#nowlege trans+ission
*1 R1/ a#nowlege trans+ission
SignalingFlow
G flow
-TT-/0*E-TT-/0
-uthentiation
R-U (intra SGS2!inter SGS2!intra R-)
S flowP*P ati3ation
P*P eati3ation
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6ain 3(R$ $ignaling 7los
,ne-!ase Access onB++"
!ontention Solution
A/ter receiing @= assignment
message# 6$ 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.
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6ain 3(R$ $ignaling 7los
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$,@R+ RF. I/ t!e
to T==Is are
consistent# t!e contention
solution is success/ul.
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6ain 3(R$ $ignaling 7los
@lin: TB7 stalis!ment in T6
MS "etwork
Packet Downlink Assignent
R#!$MA! B#%!&
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6ain 3(R$ $ignaling 7los
Donlin: TB7 stalis!ment in T6
MS "etwork
Packet 'link Assignent
R#!$MA! B#%!&('SF)
R#! DATA B#%!&
Packet Downlink A!&$"ack (!annel Re*uest)
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6ain 3(R$ $ignaling 7los
aging 7los
MS "etwork
Packet !annel Re*uest
Packet Iediate Assignent
Packet Paging Resonse (##! frae)
PRA!+ or RA!+
PAG!+or AG!+
PA!!+
PP!+ or P!+PacketPaging Re*uest
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6ain 3(R$ $ignaling 7los
@lin: Data Transmission
Packet 'link Ack$"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
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6ain 3(R$ $ignaling 7los
Donlin: Data Transmission
Packet Downlink Ack$"ack
MS "etwork
PA!!+
Packet Downlink AssignentPA!!+
PDT!+
PA!!+final Packet Ack$"ack
Data BlockPDT!+
Data BlockPDT!+
Data Block (olling)PDT!+
PDT!+Data Block
PDT!+
Data Block
Data Block
Data Block (last0 olling)PA!!+
Iediate AssignentAG!+
Packet Downlink Assignent
##! PD'
SGS"
PA!!+
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6ain 3(R$ $ignaling 7los
Attac! 7lo 1; 6$ 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.
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+ontents
A Brief Introduction to (E)GPRS Signaling
Main (E)GPRS Signaling Flows
(E)GPRS Field Test
Main (E)GPRS Test Signaling Flow
I t l U O l
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3(R$ 7ield Test
-ttah &*etah
I t l U O l
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3(R$ 7ield Test
P*P ati3e & eati3e
I t l U O l
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3(R$ 7ield Test
R-U
Internal Use Only
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3(R$ 7ield Test
FTP & Ping
Internal Use Only
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