gsm procedure

7/25/2019 Gsm Procedure

1/43

Alcatel/MCD GSM Procedures (DRAFT) 1

GSM ProceduresGSM Procedures


2/43


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


3/43


GSM Protocol (1)


4/43


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


5/43

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


6/43

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


30/43


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".


31/43


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; 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


32/43


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


33/43


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)


34/43


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


35/43

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; 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$.


36/43


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


38/43

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


39/43

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


40/43


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


41/43


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


42/43


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!


43/43

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

gsm procedure

Documents