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Alcatel/MCD GSM Procedures (DRAFT) 1
GSM ProceduresGSM Procedures
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Alcatel/MCD GSM Procedures (DRAFT) 2
Aim & Contents
Aim
To give a precise vie o! t"e tra#sactio#s o# t"e #etor$ (Air% A&'is a#d A #ter!ace) To prese#t t"e di!!ere#t *MC&R Per!orma#ce Ma#ageme#t Cou#ters accordi#g to
t"ese tra#sactio#s
To detail t"e !ailures sce#ario
Co#te#ts #troductio# to t"e GSM Protocol
Radio a#d +i#$ ,sta'lis"me#t - sei.ure o! t"e SDCC c"a##el (t"e mmediateassig#me#t procedure)
T"e 0ormal Assig#me#t procedure
SDCC to TC it"out co#gestio#
SDCC to TC it" co#gestio# a#d Directed Retr
*rigi#ati#g Call
Termi#ati#g Call
+ocatio# 3pdati#g
T"e a#dover procedure
#tra cell a#dover
#ter#al (s#c"ro#ous a#d as#c"ro#ous) a#d ,4ter#al #ter cell a#dover
T"e Call Release procedure
T"e C"a##el Release procedure
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Alcatel/MCD GSM Procedures (DRAFT) 5
GSM Protocol (1)
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Alcatel/MCD GSM Procedures (DRAFT) 6
GSM Protocol (2)
+aer 5 descriptio#
RR - Radio Ressource Ma#ageme#t MS a#d 7TS a#d 7SC
Fu#ctio#s
8 Pagi#g Ma#ageme#t
8 Cip"ered Mode Ma#ageme#t
8 Fre9ue#c Rede!i#itio#
8 Dedicated C"a##el Assig#me#t
8 a#dover Ma#ageme#t
8 Measures a#d Poer Co#trol
MM - Mo'ilit Ma#ageme#t
MS to MSC / :+R
Fu#ctio#s
8 Aut"e#ti!catio# / de#ti!icatio# Procedures
8 +ocatio# 3pdati#g
8 MS Attac" / Detac"
8 Co##ectio#s Ma#ageme#t
CC - Call Co#trol
MS to MSC
Fu#ctio#s
8 Call processi#g a#d routi#g
8 DTMF Facilities
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Alcatel/MCD GSM Procedures (DRAFT) ;
GSM Protocol (3)
+ogical C"a##els
PC Pagi#g C"a##el
RAC
Ra#dom Access C"a##el
AGC
Access Gra#t C"a##el
SDCC
Sta#d&alo#e Dedicated C"a##el
SACC
Slo Associated C"a##el
TC
Tra!!ic C"a##el
FACC
Fast Associated Co#trol C"a##el
PCH RACH AGCH SDCCH + SACCH TCH/FACCH + SACCH
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Alcatel/MCD GSM Procedures (DRAFT) ,4pir A #ter!ace - Clear Re9uest - cause Radio #ter!ace Message Failure
*ld a#d 0e c"a##el are released - 7SC i#itiated RF c"a##el Release toards 7TS Cause o! t"e
release - a'#ormal release & timer e4pired
SDCC a#dover - C> = C15 are i#crme#ted
TC a#dover - C21 = C
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Alcatel/MCD GSM Procedures (DRAFT) 5
nternal andoer (%) nter Cell S4ncronous
MS BTSservin" BSC MSCBTStar"et
Meas Re0ort Meas Result H; Alar! E Candidate Cell
Ph1s Conte8t Req
Ph1s Conte8t Con-
Channel Activation
Channel Act Ack7
H; Co!!andH; Co!!and
H; AccessH; Detection
SABM (sta9lish nd#A
Handover Co!0lete Handover Co!0lete
Handover Per-or!ed
RF Channel Release
RF Channel Rel7 Ack7
ST$%&:
(T$%&:
ST$%&'
(T$%&'
ST'%&'
ST'%&'
ST'%&*
(T'%&*
STRCRAC
(TRCRAC
ST)&&
(T)&&
C1#
C1%C3"C$#C3/C3!
C1/ C%2 C"2 C%. C".
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Alcatel/MCD GSM Procedures (DRAFT) 51
nternal andoer (.) nter Cell As4ncronous
MS BTSservin" BSC MSCBTStar"et
Meas Re0ort Meas Result H; Alar! E Candidate Cell
Channel Activation
Channel Act Ack7
H; Co!!andH; Co!!and
H; Access
H; Detection
SABM
(sta9lish nd#A
Handover Co!0lete Handover Co!0leteHandover Per-or!ed
RF Channel Release
RF Channel Rel7 Ack7
ST$%&'
(T$%&'
ST'%&'
ST'%&'
ST'%&
(T'%&
Ph1sical n-o
ST'%)>
(T'%)>
ST)&&
(T)&&
STRCRAC
(TRCRAC
Ph1s Conte8t Req
Ph1s Conte8t Con-
ST$%&:
(T$%&:
C1#
C1%C3"C$#C3/C3!
C1/ C%2
C%%
C%. C"2 C".
C/56 777
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Alcatel/MCD GSM Procedures (DRAFT) 52
nternal andoer (/) nter Cell Error
Co#gestio#
0o RTC o# t"e re9uired Cell is availa'le - C;1 = CB1 are i#creme#ted
TB1? ,4pir Same 'e"aviour as t"e #tracell a#dover
C"a##el Activatio# 0egative Ac$#oledge Same 'e"aviour as t"e #tracell a#dover
SDCC a#dover - CB is i#creme#ted
TC a#dover - C16 (C16a) = C;6 are i#creme#ted
C; = CB; are i#creme#ted
TB15 ,4pir Same 'e"aviour as t"e #tracell a#dover SDCC a#dover - CB is i#creme#ted
TC a#dover - C16 (C16a) = C;6 are i#creme#ted
C; = CB; are i#creme#ted
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Alcatel/MCD GSM Procedures (DRAFT) 55
nternal andoer (!) nter Cell Error
T515 ,4pir
A #ter!ace - Clear Re9uest - cause Radio #ter!ace Message Failure *ld a#d 0e c"a##el are released - 7SC i#itiated RF c"a##el Release toards 7TS
Cause o! t"e release - a'#ormal release & timer e4pired
SDCC a#dover - C>% CB5 = CB? are i#creme#ted
TC a#dover - C21% C;5 = C;? are i#creme#ted
a#dover Failure
Received o# t"e old C"a##el !rom t"e MS 7SC i#tiated RF C"a##el release o# t"e 7TS (old C"a##el)
SDCC a#dover - C?% CB5 = CB> are i#creme#ted
TC a#dover - C22% C;5 = are i#creme#ted
T2 ,4pir MS ca# se#d up to 02 SA7M !rames
Co##ectio# Failure #dicatio# Cause - a#dover Access Failure
7SC i#tiated RF C"a##el release o# t"e 7TS (old C"a##el)
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Alcatel/MCD GSM Procedures (DRAFT) 56
nternal andoer (") nter Cell Counters
#comi#g a#dover (Target 7TS)
C;1 - * !ailure due to lac$ o! Radio Ressource C;2 - * Complete
C;5 - Co##ectio# !ailure o! t"e MS o# t"e target cell -
T515 e4pires
a#dover Failure
0ote - t"e MS ma or ma #ot revert to t"e old c"a##el
C;6 - i#ter#al 7SS pro'lem duri#g C"a##el activatio#
C"a##el Activatio# 0egative Ac$#oledge
,rror Report
TB15 ,4pires
+APD Failure
*utgoi#g a#dover (7TS Source) C;; - * Comma#d received o# t"e A'is #ter!ace
C;< - * Complete received o# t"e A'is #ter!ace !rom t"e Target Cell
C;> - * Failure received o# t"e A'is #ter!ace !rom t"e Servi#g Cell
C;? - T515 e4pir (i#creme#ts also C21)
C;B - Failure due to i#ter#al 7SS Pro'lem
+APD Failure or ,rror #dicatio# or ,rror Report
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Alcatel/MCD GSM Procedures (DRAFT) 5;
E5ternal andoer (1) nter Cell S4ncronous
MS BTSservin" BSCservin" MSCBTStar"et
Meas Re0ort Meas ResultH; Alar! E Candidate Cell
Channel Activation
Channel Act Ack7
H; Co!!andH; Co!!and
H; Access H; Detection
SABM(sta9lish nd
#A
Handover Co!0lete Handover Co!0lete H; Co!0lete
RF Channel Release
RF Ch7 Rel7 Ack7
BSCtar"et
H; RequiredH; Request
H; Request Ack7
H; Co!!and
Ph1s n-or!ation
SCCP Con Required
SCCP Con Con-7
Clear Co!!and
Clear Co!0lete
SCCP Released
SCCP Rel7 C!07
STrr)
(T'%)>
(Trr)
ST4
(T4
ST$%&'
ST$%&'
ST$%%'
ST'%&'
(T'%&'
ST'%)>
ST)&&
(T)&&
ST'%&*
(T'%&*
ST:
(T:
C1%
C1/
C3"C$#C3/C3!
C1# C$2
C$%
C$.
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Alcatel/MCD GSM Procedures (DRAFT) 5
E5ternal andoer (3) nter Cell Errors
T> ,4pir
T? ,4pir SDCC a#dover - C> = C?? are i#creme#ted
TC a#dover - C21 = C6? are i#creme#ted
0o Terrestrial Tra!!ic C"a##el availa'le - C1B is i#creme#ted
Co#gestio# - ! Eueuei#g is e#a'led - C15 is i#creme#ted ! Eueuei#g is disa'led - C12 is i#creme#ted
! Eueuei#g is e#a'led a#d t"e re9uest ca#t 'e 9ueued - C12 is i#creme#ted
TB15 ,4pir
A #ter!ace - a#dover Failure & Radio #ter!ace Failure 7SC i#itiated R! C"a##el Release torards t"e 7TS
SDCC a#dover - CB% C; = C?6 are i#creme#ted
TC a#dover - C16 (C16a) = C66 are i#creme#ted
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Alcatel/MCD GSM Procedures (DRAFT) 5?
E5ternal andoer ($) nter Cell Errors
TB115 ,4pir
A #ter!ace - Clear Re9uest & Radio #ter!ace Message Failure 7SC i#tiated Release toards t"e MS/7TS
TC a#dover - C65 is i#creme#ted / SDCC a#dover - C?5 is i#creme#ted
#ter#al 7SS Pro'lem
C; = C?6 are i#creme#ted
C"a##el Activatio# #egative ac$#oledge
C"a##el Alread Activated - A #ter!ace - a#dover Failure & Radio #ter!ace Failure
7SC i#itiated Release toards t"e MS/7TS
All ot"er causes -
A #ter!ace - a#dover !ailure & Radio #ter!ace Failure
+ocal Release
SDCC a#dover - CB is i#creme#ted / TC a#dover - C16 = C66 are i#creme#ted
Co##ectio# Failure i#dicatio# (Cause - a#dover Access Failure)
A #ter!ace - Clear Re9uest & Radio #ter!ace & Failure
C65 = C?5 are i#creme#ted
Clear Comma#d
Cause Radio #ter!ace Failure & Reversio# to *ld C"a##el
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Alcatel/MCD GSM Procedures (DRAFT) 5B
E5ternal andoer (%) nter Cell Counters
#comi#g a#dover
C61 - RTC * !ails o# t"e target 7SS due to lac$ o! Radio C"a##el Ressoucre orpro'lem it" Terrestrial C"a##el Ressource allocatio#
* Re9uired se#d to t"e MSC
8 0o !ree TC to allocate to t"e * (eve# a!ter Eueui#g)
8 Terrestrial C"a##el Ressource ca##ot 'e sei.ed
C62 - Success!ul RTC * completed o# t"e Target 7SS
* Complete received !rom t"e Target cell o# A'is #ter!ace
C65 - t"e MS !ails to sei.e t"e target RTC
Co##ectio# Failure #dicatio# (*AccessFailure) or TB115 e4pir or Clear Commad (RF &
R*C)
C66 - * !ailure due to i#ter#al 7SS pro'lem
C"a##el Activatio# 0egative Ac$#oledge or +APD error detecetd o# t"e A'is i#ter!ace or
TB15 e4pir
*utgoi#g a#dover
C6; - * Re9uired !or RTC * o# t"e A i#ter!ace C6< - Clear Comma#d cause * Success!ul
C6> - a#dover Failure & RF & R*C o# A'is #ter!ace
C6? - T? ,4pir (i#creme#ts also C21)
C6B - RTC * Failure due to i#ter#al 7SS Pro'lem
+APD !ailure or ,rror Report
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Alcatel/MCD GSM Procedures (DRAFT) 6
Call Release (1)
MS BTS BSC MSC
DisconnectDisconnect Disconnect
Release ReleaseRelease
Release Co!0lete Release Co!0leteRelease Co!0lete
Call Release 91 the MS
DisconnectDisconnect Disconnect
Release ReleaseRelease
Release Co!0lete Release Co!0leteRelease Co!0lete
Call Release 91 the @etork
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Alcatel/MCD GSM Procedures (DRAFT) 61
Call release (2) Link Release
#troductio#
Air #ter!ace = A #ter!ace release are ru# separatl @"e# i# a c"a##el c"a#ge it appears t"at t"e MS is lost% a release protocol
to t"e MS ill 'e i#itiated
MS Release C"a##el Release to t"e MS
7SC #itiated C"a##el Release toards t"e MS/7TS
Radio +i#$ Failure
7TS C"a##el release 7SC i#titiated
RF C"a##el Release to t"e 7TS
7TS i#itiated
A #ter!ace call release procedure MSC ma i#itiate a call release i# t"e 7SS &H C+,AR C*MMAD
7SC ma i#itiate a call release i# t"e MSC &H C+,AR R,E3,ST
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Alcatel/MCD GSM Procedures (DRAFT) 62
Call release (3) Link Release MS Release
MS BTS BSC MSC
DSC 5FACCH6
Channel Release 5DCCH6
Desactivate SACCH
Release ndication#A
Ph1 Conte8t Request
Ph1 Conte8t Con-ir!
RF Channel Release
RF Channel Release Ack
(T'%%&
ST'%%&
ST'%%%
T'%%% (80ir1
ST$%&:
(T$%&:
STRCRAC
(TRCRAC
BSC nitiated Channel
Release toards the MS
@o SACCH received -ro! the MS
Connection Fail nd
RF Channel Release
RF Channel Release Ack
STRCRAC
(TRCRAC
Radio ,ink Failure
C$#C3!
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Call release ($) Link Release A nter'ace Release
MSCBSC
Clear Request
Clear Co!!and
Clear Co!0lete
SCCP Released
SCCP Released Co!0lete
BSC nitiated @or!al
Call Release toards the MSC
Clear Co!!and
Clear Co!0lete
SCCP Released
SCCP Released Co!0lete
MSC nitiated @or!al
Call Release toards the BSC
ST$%&>
(T$%&>
ST$%&%
(T$%&%
ST$%&%
(T$%&%
C2# C13.
C13" C13/
C21