57348591 pm message flows br60

Information

System

PM:SBS Message Flows

A30808-X3247-K41-1-7618 Prelim.07/2001

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PM:SBS Message Flows InformationSystem

f Important Notice on Product SafetyElevated voltages are inevitably present at specific points in this electrical equipment. Some of theparts may also have elevated operating temperatures.

Non-observance of these conditions and the safety instructions can result in personal injury or in prop-erty damage.

Therefore, only trained and qualified personnel may install and maintain the system.

The system complies with the standard EN 60950 / IEC 60950. All equipment connected has to complywith the applicable safety standards.

The same text in German:

Wichtiger Hinweis zur Produktsicherheit

In elektrischen Anlagen stehen zwangsläufig bestimmte Teile der Geräte unter Spannung. Einige Teilekönnen auch eine hohe Betriebstemperatur aufweisen.

Eine Nichtbeachtung dieser Situation und der Warnungshinweise kann zu Körperverletzungen undSachschäden führen.

Deshalb wird vorausgesetzt, dass nur geschultes und qualifiziertes Personal die Anlagen installiert undwartet.

Das System entspricht den Anforderungen der EN 60950 / IEC 60950. Angeschlossene Gerätemüssen die zutreffenden Sicherheitsbestimmungen erfüllen.

Trademarks:

All designations used in this document can be trademarks, the use of which by third parties for theirown purposes could violate the rights of their owners.

Copyright (C) Siemens AG 2000.

Issued by the Information and Communication Networks GroupHofmannstraße 51D-81359 München

Technical modifications possible.Technical specifications and features are binding only insofar asthey are specifically and expressly agreed upon in a written contract.

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Reason for UpdateSummary:

first editon for new release BR6.0

Details:

Chapter/Section Reason for Update

1 first editon for new release BR6.0

Issue History

Issue

Number

Date of Issue Reason for Update

1 07/2001 First edition for new release BR6.0

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This document consists of a total of 162 pages. All pages are issue 1.

Contents

1 Performance Measurement Message Flows . . . . . . . . . . . . . . . . . . . . . . . . 91.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.2 Message Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.2.1 Call Setup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.2.1.1 Successful Mobile Originating Cell (MOC), FR Call . . . . . . . . . . . . . . . . . . 101.2.1.2 Successful Mobile Terminating Call (MTC), FR Call. . . . . . . . . . . . . . . . . . 131.2.1.3 Successful Mobile Originating Cell (MOC) with Direct

Traffic Channel Assignment, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161.2.1.4 Successful Mobile Originating Call (MOC) Using Early

Classmark Sending, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181.2.1.5 Unsuccessful Mobile Originating Call (MOC), Subscriber B Busy,

FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.2.1.6 Unsuccessful Mobile Originating Call (MOC), No TCH Available,

FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.2.1.7 Successful Mobile Originated Call (MOC) in a Concentric Cell

(FR Call) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231.2.1.8 Successful Mobile Emergency Call (MEC), FR Call . . . . . . . . . . . . . . . . . . 251.2.2 Unsuccessful Assignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261.2.2.1 Unsuccessful TCH Assignment Procedure with Loss of

ASSIGNMENT COMMAND (T10 < T_MSRFPCI), FR Call(T10 Expiry) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1.2.2.2 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMMAND (T10 > T_MSRFPCI), FR Call(T_MSRFPCI Expiry) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1.2.2.3 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMPLETE (T10 Expiry), FR Call . . . . . . . . . . . . . . . . . . . 28

1.2.2.4 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMPLETE (T200 Expiry), FR Call . . . . . . . . . . . . . . . . . . 29

1.2.3 Call Release Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301.2.3.1 Normal Call Release (Originated by MS), FR Call . . . . . . . . . . . . . . . . . . . 301.2.3.2 Normal Call Release (Originated by Network), FR Call . . . . . . . . . . . . . . . 311.2.4 Inter-Cell Handover, Intra-BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321.2.4.1 Successful Inter-Cell Handover, Intra-BSC, FR Call. . . . . . . . . . . . . . . . . . 321.2.4.2 Unsuccessful Inter-Cell Handover Attempt, Intra-BSC,

No TCH Available in Target Cell, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . 341.2.4.3 Unsuccessful Inter-Cell Handover, Intra-BSC, with Reversion

to Old TCH (T3124 Expiry), FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351.2.4.4 Unsuccessful Inter-Cell Handover, Intra-BSC, with Loss of MS

(Loss of HO CMD, T8<TTRAU), FR Call (T8 Expiry) . . . . . . . . . . . . . . . . . 371.2.4.5 Unsuccessful Inter-Cell Handover, Intra-BSC with Loss of MS

(Loss of HO CMD, T8>TTRAU), FR Call (TTRAU Expiry) . . . . . . . . . . . . . 391.2.4.6 Unsuccessful Inter-Cell Handover, Intra-BSC, with Loss of MS,

Handover Access Failure (No SABM after Transmission ofPHYS INFO, [(NY1+1) * T3105]<<T8<TTRAU) . . . . . . . . . . . . . . . . . . . . . 41

1.2.4.7 Successful Inter-Cell Handover (Intra-BSC) between ColocatedConcentric Cells, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

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1.2.4.8 Successful Inter-Cell Handover, Intra-BTSE, BetweenSynchronized Cells, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

1.2.4.9 Successful Inter-Cell Handover, Intra-BSC, MSC Controlled, FR Call . . . . 471.2.4.10 Successful SDCCH-SDCCH Inter-Cell Handover, Intra-BSC . . . . . . . . . . . 491.2.4.11 Unsuccessful SDCCH-SDCCH Inter-Cell Handover Attempt,

Intra-BSC, No SDCCH Available in Target Cell . . . . . . . . . . . . . . . . . . . . . . 511.2.4.12 Unsuccessful SDCCH-SDCCH Inter-Cell Handover, Intra-BSC, with Loss of

MS (Loss of HO CMD, T8 Expiry) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521.2.5 Inter-Cell Handover, Inter-BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 541.2.5.1 Successful Inter-Cell Handover, Inter-BSC, FR Call . . . . . . . . . . . . . . . . . . 541.2.5.2 Unsuccsessful Inter-Cell Handover, Inter-BSC, No TCH

Available in Target Cell, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561.2.5.3 Unsuccessful Inter-Cell Handover, Inter-BSC, with Reversion

to Old TCH, FR Call (T3124 Expiry). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 571.2.5.4 Unsuccessful Inter-Cell Handover, Inter-BSC with Loss of MS

(Loss of HO CMD, T8<Trr7), FR Call (T8 Expiry) . . . . . . . . . . . . . . . . . . . . 591.2.5.5 Unsuccessful Inter-Cell Handover, Inter-BSC with Loss of MS

(Loss of HO CMD, T8>Trr7), FR Call (Trr7 Expiry) . . . . . . . . . . . . . . . . . . . 611.2.5.6 Successful Inter-Cell Handover, Inter-BSC, No TCH Available

in First (external) Cell, Second Target Cell Belongs toOriginating BSC, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

1.2.5.7 Successful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC . . . . . . . . . . . 651.2.5.8 Unsuccsessful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC,

No SDCCH Available in Target Cell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 671.2.5.9 Unsuccessful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC with Loss of

MS (Loss of HO CMD, T8<Trr7, T8 Expiry) . . . . . . . . . . . . . . . . . . . . . . . . . 681.2.6 Intra-Cell Handover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.2.6.1 Successful Intra-Cell Handover, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.2.6.2 Unsuccessful Intra-Cell Handover Due to Quality, No TCH Available,

FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 721.2.6.3 Unsuccessful Intra-Cell Handover Due to Quality with

Reversion to Old TCH, FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 731.2.6.4 Unsuccessful Intra-Cell Handover with Loss of MS (Loss of

ASS CMD, T10 < TTRAU), FR Call (T10 Expiry). . . . . . . . . . . . . . . . . . . . . 751.2.6.5 Unsuccessful Intra-Cell Handover with Loss of MS (Loss of

ASS CMD, T10>TTRAU), FR Call (TTRAU Expiry) . . . . . . . . . . . . . . . . . . . 771.2.6.6 Successful Intra-Cell Handover Due to Quality, MSC Controlled,

FR Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 791.2.6.7 Successful SDCCH-SDCCH Intra-Cell Handover . . . . . . . . . . . . . . . . . . . . 811.2.7 Directed Retry, Intra-BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 831.2.7.1 Successful Directed Retry, Intra-BSC, FR Call . . . . . . . . . . . . . . . . . . . . . . 831.2.7.2 Unsuccessful Directed Retry, No Target Cell Available, FR Call . . . . . . . . . 851.2.7.3 Unsuccessful Directed Retry, 1 Target Cell Available, Target

Cell Congested, FR Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 861.2.7.4 Unsuccessful Directed Retry, Intra-BSC, with Reversion to

SDCCH, FR Call (T3124 Expiry) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 871.2.7.5 Unsuccessful Directed Retry, Intra-BSC, with Loss of MS

(Loss of HO CMD, T8 < TTRAU), FR Call (T8 Expiry). . . . . . . . . . . . . . . . . 891.2.7.6 Unsuccessful Directed Retry, Intra-BSC, with Loss of MS

(Loss of HO CMD, T8 > TTRAU), FR Call (TTRAU Expiry) . . . . . . . . . . . . . 91

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1.2.8 Directed Retry, Inter-BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 931.2.8.1 Successful Directed Retry, Inter-BSC, FR Call . . . . . . . . . . . . . . . . . . . . . . 931.2.8.2 Unsuccessful Directed Retry, Inter-BSC, with Reversion to

SDCCH, FR Call (T3124 Expiry). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 961.2.8.3 Unsuccessful Directed Retry, Inter-BSC, with Loss of MS

(Loss of HO CMD, T8 < Trr7), FR Call (T8 Expiry) . . . . . . . . . . . . . . . . . . . 981.2.8.4 Unsuccessful Directed Retry, Inter-BSC, with Loss of MS

(Loss of HO CMD, T8 > Trr7), FR Call (Trr7 Expiry). . . . . . . . . . . . . . . . . 1001.2.9 Forced Handover Due to O & M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1021.2.9.1 Successful Forced Handover Due to O & M . . . . . . . . . . . . . . . . . . . . . . . 1021.2.9.2 Successful Forced Handover Due to O & M, Inter-BSC, FR Call . . . . . . . 1041.2.9.3 Successful Forced Intra-Cell Handover Due to O & M, FR Call . . . . . . . . 1061.2.10 Queuing & Preemption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1071.2.10.1 Queuing: Queued Assignment Request for FR TCH Is Served Before

T11 Expiry, Directed Retry Enabled But No Target Cell Available,Preemption Disabled or Not Allowed for the Requesting Call. . . . . . . . . . 107

1.2.10.2 Queuing: Queued Assignment Request for FR TCH Is Discarded from theQueue Before T11 Expiry Due to an Incoming FRAssignment Request with Higher Priority Directed Retry Enabled But No Tar-get Cell Available, Preemption Disabled or Not Allowed for the RequestingCall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

1.2.10.3 Queuing: Queued Assignment Request for FR TCH Is Discarded from QueueDue to T11 Expiry, Directed Retry Enabled But NoTarget Cell Available, Preemption Disabled or Not Allowed for the RequestingCall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

1.2.10.4 Queuing: Queued Handover Request for FR TCH Is Served BeforeTQHO Expiry, Preemption Disabled or Not Allowed for theRequesting Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

1.2.10.5 Queuing: Queued Handover Request for FR TCH Is Discarded fromthe Queue Before TQHO Expiry Due to an Incoming FR Call with Higher Pri-ority, Preemption Disabled or Not Allowed for theRequesting Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

1.2.10.6 Queuing: Queued Handover Request for FR TCH Is Discarded fromthe Queue Due to TQHO Expiry, Preemption Disabled or NotAllowed for the Requesting Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

1.2.10.7 Preemption: Successful Forced Inter-Cell Handover Due toPreemption, Preempted Assignment Request and Preempting Call Are BothFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

1.2.10.8 Preemption: Forced Release of Preempted Call Due to Lack ofTarget Cell for Forced Inter-Cell Handover Procedure, Preempted and Pre-empting Call Are Both FR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

1.2.10.9 Preemption: Successful Forced Inter-BSC Handover Due toPreemption, Preempting Handover Request and Preempted Call Are BothFR, Originating BSC of the Preempting Handover Request and Target BSC forthe Forced Handover Are the Same . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

1.2.11 HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1221.2.11.1 Successful HSCSD Call, Mobile Originating, 3 TCHs Used . . . . . . . . . . . 1221.2.11.2 Successful Inter-cell Handover of an HSCSD Call (3 TCHs Used),

Intra-BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1251.2.11.3 Forced Intra-cell Handover During HSCSD Assignment Procedure. . . . . 1281.2.12 Signalling Transactions without TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

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1.2.12.1 Successful Location Update (Phase 2 MS) . . . . . . . . . . . . . . . . . . . . . . . . 1301.2.12.2 Successful IMSI Detach (Phase 2 MS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1321.2.12.3 Unsuccessful Immediate Assignment Procedure, No SDCCH

Available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1331.2.12.4 Unsuccessful Immediate Assignment Procedure, No AGCH

Available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1341.2.13 Short Message Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1351.2.13.1 Successful SMS Mobile Originating in Idle Mode (Phase 2 MS) . . . . . . . . 1351.2.13.2 Successful SMS Mobile Terminating in Idle Mode (Phase 2 MS) . . . . . . . 1371.2.13.3 Successful SMS Mobile Originating in Connected Mode. . . . . . . . . . . . . . 1391.2.13.4 Successful SMS Mobile Terminating in Connected Mode . . . . . . . . . . . . . 1401.2.14 Advanced Speech Call Items (ASCI) Procedures . . . . . . . . . . . . . . . . . . . 1411.2.14.1 VGCS Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1411.2.14.2 Immediate Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1421.2.14.3 Common VGCS TCH Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1431.2.14.4 Free Uplink Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1441.2.14.5 Successful Uplink Allocation Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . 1451.2.14.6 Uplink Seized Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1461.2.14.7 VGCS Call Originated by a Dispatcher . . . . . . . . . . . . . . . . . . . . . . . . . . . 1471.2.14.8 Complete Sequence of ASCI Call Setup and Release . . . . . . . . . . . . . . . 1481.2.15 Other Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1511.2.15.1 Idle Traffic Channel Supervision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1511.2.15.2 Uplink and Downlink Measurement Reports at Abis . . . . . . . . . . . . . . . . . 1521.2.15.3 IMSI Trace Invocation for Normal Call Setup. . . . . . . . . . . . . . . . . . . . . . . 1531.2.15.4 IMSI Trace Invocation for Incoming Inter-BSC Handover . . . . . . . . . . . . . 154

2 Counter / Message Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

3 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

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1 Performance Measurement Message Flows

1.1 IntroductionThe following sections show the SBS specific message flows of call- and signalling-transactions on the interfaces Um, Abis and A.

The messages between the network elements (MS, BTS, BSC and MSC) are abbrevi-ated in the same way as the most common protocol analyzers (e.g. K1103, K1205, MA-10 etc.) do. For the mapping of the used abbreviations to the complete message namesdefined by GSM and the Siemens Abis specifications please refer to Chapter 2 “Abbre-viations”.

In addition to the messages, the implemented SBS performance measurement countersare embedded into the message flows in such a way that the association of the countersto their triggering events becomes clear. As a general rule, the appearance of a counterwithin a message flow means that its value is increased by ’1’. Deviations from this ruleare explicitely mentioned in the message flows.

To indicate also the subcounters of the specific measurements the following method isused: <measurement name>(<subcounter no.>.).

Example:“ATINHIRC (2.)” means that the second subcounter of the measurement ATINHIRC(’downlink quality’) is increased by the marked event.

iNote: The message flows have to be considered as typical examples for the affectedsignaling transactions. Depending on specific settings in the involved network elements(MSC, BSC), flow traces taken from ’real live’ networks can deviate from the shownmessage flows (especially for the optional sub-procedures Authentication, Ciphering,Early Classmark Sending and TMSI Reallocation).

iNote: If not otherwise defined the blue colour generally indicates the events on the han-dover target resources.In 1.2.10.2 the blue colour indicates the events related to the second (high priority) call.In 1.2.10.5 the blue colour indicates the events related to the high priority callIn 1.2.10.7, 1.2.10.8 and 1.2.10.9 the blue colour indicates the events related topreemting call.In 1.2.5.6 the red colour indicates the BSC serving the first (really external) target cell inthe target cell list of the HANDOVER REQUIRED message.

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1.2 Message Flows

1.2.1 Call Setup Procedures

1.2.1.1 Successful Mobile Originating Cell (MOC), FR Call

BTS BSCMS MSC

CHNRD

NSUCCHPC (4.)NASUSDPE

CHNREQ

UI (IMASS)

SABM (CMSREQ)

UA

ESTIN (CMSREQ)

CHNAV (SDCCH)

CHNAK

IACMD (IMASS)

TACCBPRO (2.)SUIMASCA (4.)NACSUCPR (2.)

RACH

AGCH

SDCCH

SDCCH

DT1 (CICMP)

I (CIMCMD)

I (CIMCMP)

ENCRY (CIMCMD)

MRPCI

DATIN (CIMCMP)

DT1 (CICMD)

SDCCH

SDCCH

DT1 (AUTREP)

I (AUTREQ)

I (AUTREP)

DATRQ (AUTREQ)

DATIN (AUTREP)

CC (AUTREQ)

SDCCH

SDCCH

CR (CL3I; CMSREQ)

NATTSDPENACSUCPR (3.)ATIMASCA (4.)If last SDCCH startASDCALTI

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BTS BSCMS MSC

I (ASS CMD)

PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

MTCHBUTI (1.) (start)

DT1 (ASS REQ)

SDCCH

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

I (ASS CMP)

SABM

UAESTIN

SUCTCHSE (1.)TASSSUCC (2.)

TNTCHCL (1.)

DATIN (ASS CMP)

MRPCI

DT1 (ASS CMP)

FACCH

FACCH

FACCH

Stop T_MSRFPCI

DATIN (SETUP)SETUP

DT1 (SETUP)

DT1 (CPROC)

SDCCH

I (CPROC) DATRQ (CPROC)SDCCH

ATTCHSEI (1.)TASSATT (2.)If last TCH startAALTCHTI (1.)

RELCN

RCHRL (SDCCH)

RCHRA

ASDCALTI(stop)

RELRQ

Start T10

StopT10

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BTS BSCMS MSC

I (CONACK)

DT1 (ALERT)

I (ALERT) DATRQ (ALERT)

DATIN (CONACK) DT1 (CONACK)

DT1 (CONNECT)DATRQ (CONNECT)I (CONNECT)

FACCH

FACCH

FACCH

Conversation phase ...

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of TCH Assignment this is done ontransmission of the ASSIGNMENT COMMAND.

(**)

A30808-X3247-K41-1-7618 Prelim.07/2001 13

InformationSystem


1.2.1.2 Successful Mobile Terminating Call (MTC), FR Call

BTS BSCMS MSC

PGCMD

CHNAV (SDCCH)

TACCBPRO (1.)



NATTSDPENACSUCPR (1.), (3.)ATIMASCA (1.)If last SDCCH startASDCALTI

UDT (PAGIN)

CHNRD

CHNAK

IACMD (IMASS)

UA

ESTIN (PAGRES)

MRPCICR (CL3I; PAGRES)

UI (IMASS)

SABM (PAGRES)

AGCH

SDCCH

UI (PAGREQ)PCH

SDCCH

CHNREQRACH

Optional: Authentication & Ciphering Procedure (see 1.2.1.1)

DT1 (TRCMD)DATRQ (TRCMD)I (TRCMD)

I SETUP

I (TRCMP)

DT1 (SETUP)DATIN (SETUP)

DATIN (TRCMP)DT1 (TRCMP)I CCONF

DATRQ (CCONF) DT1 (CCONF)

SDCCH

SDCCH

SDCCH

SDCCH

14 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

PHCRQ

PHCCN


DT1 (ASREQ)

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

I (ASS CMD)

SABMESTIN

DATIN (ASS CMP)

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

TNTCHCL (1.)

SDCCH

FACCH

DT1 (ASS CMP)


I (ASS CMP)FACCH

UASDCCH

MRPCI

Stop T_MSRFPCI


Start T10

StopT10

RELRQ

RCHRL (SDCCH)

RCHRA

ASDCALTI(stop)

RELCN

A30808-X3247-K41-1-7618 Prelim.07/2001 15

InformationSystem


BTS BSCMS MSC

DT1 (ALERT)DATRQ (ALERT)I (ALERT)

I (CONNECT)

I (CONACK)

DT1 (CONNECT)DATRQ (CONNECT)

DATIN (CONACK)DT1 (CONACK)


(**)


FACCH

FACCH

FACCH

16 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.1.3 Successful Mobile Originating Cell (MOC) with DirectTraffic Channel Assignment, FR Call

BTS BSCMS MSC

CHNAV (TCH)

CHNAK

ATTCHSEI (1.)ATIMASCA (4.)NASCUCPR (3.)If last TCH startAALTCHTI (1.)

NSUCCHPC (10.)SUCTCHSE (1.)TNTCHCL (1.)

CHNRD

IACMD (IMASS)

ESTIN (CMSREQ)

MRPCI

UI (IMASS)

SABM (CMSREQ)

AGCH

FACCH

CHNREQRACH

MTCHBUTI (1.) (start)Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

Stop T_MSRFPCI

I (SETUP) DATIN (SETUP)DT1 (SETUP)FACCH

UAFACCH


DATRQ (CPROC)I (CPROC)

DT1 (CPROC)

FACCH

CR (CL3I;CMSREQ)


A30808-X3247-K41-1-7618 Prelim.07/2001 17

InformationSystem


BTS BSCMS MSC

MOMRQ

DT1 (ASS CMP)

TASSSUCC (2.)

I (CHMM)

I (CHMMACK)

MOMAK

DATRQ (CHMM)

DATIN (CHMMACK)

DT1 (ASS REQ)


I (CONNECT)

I (CONACK)DATIN (CONACK)

DT1 (CONACK)

DT1 (ALERT)DATRQ (ALERT)

I (ALERT)

FACCH

FACCH

FACCH

FACCH

FACCH



(**)

TASSATT (2.)

(***)

In case of direct TCH assignment the timer T10 is not used. Two not-administrable system internaltimers are used, one for the control of the MOMRQ procedure, one for the control of the CHMMprocedure. In case of expiry of one of these timers, the BSC sends an ASS FAI with cause ’equipmentfailure’ to the MSC.

(***)

18 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.1.4 Successful Mobile Originating Call (MOC) Using EarlyClassmark Sending, FR Call

BTS BSCMS MSC

CHNAV (SDCCH)

CHNAK




CHNRD

IACMD (IMASS)

ESTIN (CMSREQ)

MRPCI

I (CLAMCH)

CC (CICMD)ENCRY (CIMCMD)

DATIN (CLAMCH)DT1 (CLUPD)

I (CIMCMP)DATIN (CIMCMP)

DT1 (CICMP)

I (TRCMD)

DT1 (TRCMD)DATRQ (TRCMD)

UI (IMASS)

I (CMSREQ)

AGCH

SDCCH

CHNREQRACH

SDCCH

I (CIMCMD)

SDCCH

SDCCH

SDCCH

CR (CL3I; CMSREQ)

I (CPROC)DATRQ (CPROC)

DATIN (SETUP)I (SETUP)

DT1 (SETUP)

DT1 (CPROC)

SDCCH

SDCCH

A30808-X3247-K41-1-7618 Prelim.07/2001 19

InformationSystem


BTS BSCMS MSC

DT1 (ASREQ)

PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

ESTIN

I (ASS CMD)

I (ASS CMP)DATIN (ASS CMP)

DT1 (TRCMP)

I (TRCMP)DATIN (TRCMP)

DT1 (ASS CMP)

MRPCI


Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

FACCH

Stop T_MSRFPCI

SDCCH

SDCCH

SABM

FACCH

UAFACCH

ATTCHSEITASSATT (5)If last TCH startAALTCHTI


TNTCHCL (1.)

Start T10

StopT10

RELRQ

ASDCALTI (stop)

RELCN

RCHRL (SDCCH)

RCHRA

20 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

DT1 (ALERT)

Call setup continuation...


(**)

DATRQ (ALERT)I (ALERT)

FACCH

A30808-X3247-K41-1-7618 Prelim.07/2001 21

InformationSystem


1.2.1.5 Unsuccessful Mobile Originating Call (MOC), Subscriber B Busy,FR Call

BTS BSCMS MSC

DT1 (ASS CMP)



MRPCI

RELRQ

Call setup ... (see Successful MOC)

Call release... (see ‚Normal call release, originated by network‘)

RCHRL (SDCCH)

RELCN

DT1 (DISC)ASDCALTI (stop)

RCHRA

(Cause: user busy)

FACCH

I (DISC)SDCCH

DATRQ (DISC)

Stop T_MSRFPCI

Stop T10

22 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.1.6 Unsuccessful Mobile Originating Call (MOC), No TCH Available,FR Call

BTS BSCMS MSC

I (SETUP)DATIN (SETUP)

TASSFAIL (8.)

ATTCHSEI (1.)ATCHSMBS (1.)TASSATT (2.)

DT1 (SETUP)

DT1 (CPROC)DATRQ (CPROC)

I (CPROC) DT1 (ASS REQ)

DT1 (ASS FAI)

(Cause: no radio resource available)

Call release ... (see ‚Normal call release, originated by network‘)

DT1 (DISC)(Cause: normal, unspecified)I (DISC)

FACCH

DATRQ (DISC)

Call setup ... (see Successful MOC)

SDCCH

SDCCH

A30808-X3247-K41-1-7618 Prelim.07/2001 23

InformationSystem


1.2.1.7 Successful Mobile Originated Call (MOC) in a Concentric Cell(FR Call)

BTS BSCMS MSC




DATIN (SETUP)I (SETUP)

DT1 (SETUP)

DT1 (CPROC)

DT1 (ASS REQ)

PAREQ

PAREA

PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

Call setup ...

SDCCH

SDCCH

(preferred area type: inner area)

Start TTRAU

Start T_MSRFPCI

I (ASS CMD)SDCCH

DATRQ (ASS CMD)

Stop TTRAU (**)

FACCHSABM

UAFACCH

I (ASS CMP)DATIN (ASS CMP)FACCH

TNTCHCL (1.) (for concentric cells)

ESTIN


DT1 (ASS CMP)

Start T10

StopT10

24 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

RELCN

AALTCHTI (1.) (stop)MTCHBUTI (1.)(stop)

DT1 (ALERT)

MRPCI

RELRQ

RCHRL (SDCCH)

RCHRA

Call setup continuation ...


(**)

Stop T_MSRFPCI

DATRQ (ALERT)I (ALERT)

FACCH

A30808-X3247-K41-1-7618 Prelim.07/2001 25

InformationSystem


1.2.1.8 Successful Mobile Emergency Call (MEC), FR Call

BTS BSCMS MSC

CHNREQ

CHNAV (SDCCH)

CHNAK

CR (CL3I; CMSREQ)


TACCBPRO () (2.)SUIMASCA (2.)NACSUCPR (2.)


CHNRD

IACMD (IMASS)UI (IMASS)

SABM (CMSREQ)ESTIN (CMSREQ)

MRPCI

RACH (Requestreference:emergency call)

AGCH

SDCCH (CM service type:emergency call es-tablishment)

I (EMSETUP)DATIN (EMSETUP)

DT1 (EMSETUP)

DT1 (CPROC)

SDCCH


DATRQ (CPROC)I (CPROC)

SDCCH

UASDCCH


DT1 (ASREQ)

Call setup continuation ...

26 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.2 Unsuccessful Assignment Procedures

1.2.2.1 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMMAND (T10 < T_MSRFPCI), FR Call(T10 Expiry)

BTS BSCMS MSC

DT1 (ASS REQ)

Start T10

Start T_MSRFPCI

Expiry T10 DT1 (ASS FAI)

ATTCHSEI (1.)TASSATT (2.)If last TCH startAALTCHTI

TASSFAIL (6.)

PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

I (ASS CMD)

(Cause: radio interface msg failure)

DT1 (CL CMD)

(Cause: call control)

Call setup ...

SDCCH

Start TTRAU

Stop TTRAU (**)

Release of resources ...


(**)


ASS CMD islost ...

A30808-X3247-K41-1-7618 Prelim.07/2001 27

InformationSystem


1.2.2.2 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMMAND (T10 > T_MSRFPCI), FR Call(T_MSRFPCI Expiry)

BTS BSCMS MSC

DT1 (ASS REQ)

Start T10

Start T_MSRFPCI

DT1 (CL REQ)


NRFLTCH (4.)

PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

I (ASS CMD)


DT1 (CL CMD)


Call setup ...

SDCCH

Start TTRAU

Stop TTRAU (**)


ASS CMD islost ...

Expiry T_MSRFPCICONFL


(Cause:T_MSRFPCIexpired)

(**) TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of TCH Assignment this is done ontransmission of the ASSIGNMENT COMMAND.

28 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.2.3 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMPLETE (T10 Expiry), FR Call

BTS BSCMS MSC

DT1 (ASS REQ)

Start T10

Start T_MSRFPCI

Expiry T10 DT1 (ASS FAI)

TASSFAIL (6.)

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

I (ASS CMD)


DT1 (CL CMD)

Call setup ...

SDCCH

Start TTRAU

Stop TTRAU (**)


ASS CMP islost ...



I (ASS CMP)FACCH

FACCH

FACCH

SABM

UATNTCHCL (1.)

ESTIN

PHCRQ



**

A30808-X3247-K41-1-7618 Prelim.07/2001 29

InformationSystem


1.2.2.4 Unsuccessful TCH Assignment Procedure with Loss ofASSIGNMENT COMPLETE (T200 Expiry), FR Call

BTS BSCMS MSC

DT1 (ASS REQ)

Start T10

Start T_MSRFPCI


PHCRQ

PHCCN

CHNAV (TCH)

CHNAK

DATRQ (ASS CMD)

Call setup ...

Start TTRAU

Stop TTRAU (**)



I (ASS CMD)SDCCH

ASS CMP islost ...

I (ASS CMP)FACCH

FACCH

FACCH

SABM

UA

DT1 (CL REQ)


DT1 (CL CMD)(Cause: radio interface msg failure)

TNTCHCL (7.)

ESTIN

NRFLTCH (1.)

ERRIN(Cause: timer T200expired)


(**)

30 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.3 Call Release Procedures

1.2.3.1 Normal Call Release (Originated by MS), FR Call

BTS BSCMS MSC

I (DISC)

DATRQ (RELEAS)

DATIN (REL CMP)

MTCHBUTI (1.) (stop)AALTCHTI (1.) (stop)

DATIN (DISC)DT1 (DISC)

DT1 (RELEAS)

I (RELEAS)

I (RELCMP)DT1 (REL CMP)

DATRQ (CHREL)DT1 (CL CMD)

I (CHREL)

DESACDT1 (CL CMP)

RLSD

RLC

RELIN

RCHRL (TCH)

RCHRA


(Cause:normalcall clearing)

FACCH

FACCH

FACCH

FACCH

DISCFACCH

UAFACCH

(Cause: normalcall clearing)


(Cause: end user originated)

Start T3110

Stop T3110

Start T3109

Stop T3109

Start T3111

Expiry T3111

A30808-X3247-K41-1-7618 Prelim.07/2001 31

InformationSystem


1.2.3.2 Normal Call Release (Originated by Network), FR Call

BTS BSCMS MSC

I (DISC)

DATRQ (RELEAS)

DATIN (REL CMP)


DATIN (DISC)DT1 (DISC)

DT1 (RELEAS)I (RELEAS)

I (RELCMP)DT1 (REL CMP)

DATRQ (CHREL)

DT1 (CL CMD)

I (CHREL)

DESAC

DT1 (CL CMP)

RLSD

RLC

RELIN

RCHRL (TCH)

RCHRA


FACCH

FACCH

FACCH

FACCH

DISCFACCH

UAFACCH



(Cause: end user originated)


Start T3110

Stop T3110

Start T3109

Stop T3109

Start T3111

Expiry T3111

32 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.4 Inter-Cell Handover, Intra-BSC

1.2.4.1 Successful Inter-Cell Handover, Intra-BSC, FR Call

BTSold BTSnew BSCMS MSC

CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8

HANDO

Start T3124

Stop T3124Start T3105

ATTCHSEI (1.)ATINHIRC (*)If last TCH startAALTCHTI (1.)

Start THORQST

Start TTRAU

Stop TTRAU (**)

Start T_MSRFPCI

UI (MEAS REP)

HO ACCESS

UI (PHYS INFO)

SACCH

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

FACCH

FACCH

FACCH

(With HO cause)

BWHCI

DATRQ (HO CMD)

AININIRHAOUINIRH (*)

Stop T3105ESTIN

SABM

UA

FACCH

FACCHTNTCHCL (1.)

Call in progress

A30808-X3247-K41-1-7618 Prelim.07/2001 33

InformationSystem



MRPCI


Stop T8

DATIN (HO CMP)

SUCTCHSE (1.)

DT1 (HOPER)

SINTHINT (*)SININIRHSOUINIRH (*)SINHOBSC (*)

Note: Subcounter depends on the handover cause value contained in the HANDOVER CONDITIONINDICATION.

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-BSC handover this is doneafter receipt of the HANDOVER DETECT message.

(**)

(*)

Stop T_MSRFPCI (With HO cause)

RELRQ

RELCN

RCHRL (Old TCH)

RCHRA

I (HO CMP)FACCH

Call continuation ...

34 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.4.2 Unsuccessful Inter-Cell Handover Attempt, Intra-BSC,No TCH Available in Target Cell, FR Call


ATTCHSEI (1.)ATCHSMBS (1.)ATINHIRC (*)

......

......

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Note: Subcounter depends on the handover cause value contained in the HANDOVER CONDI-TION INDICATION.

(*)

BWHCI

(With HO cause)

ATTCHSEI (1.)ATCHSMBS (1.)ATINHIRC (*)

BWHCI

(With HO cause)

Start THORQST

Expiry THORQST

Call in progress


A30808-X3247-K41-1-7618 Prelim.07/2001 35

InformationSystem


1.2.4.3 Unsuccessful Inter-Cell Handover, Intra-BSC, with Reversionto Old TCH (T3124 Expiry), FR Call


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8


Start T3124

Expiry T3124


Start THORQST

Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)

HO ACCESS

SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

FACCH

FACCH

HO ACCESSdoes not getthrough

SABM

UAFACCH

FACCH

ESTIN

HO ACCESSFACCH

Stop T8

HOFITABSUNINHOIE (*)

I (HO FAIL)FACCH DATIN (HO FAIL)

(Cause: protocolerror, unspecified)

Call in progress

36 A30808-X3247-K41-1-7618 Prelim.07/2001



RCHRL (New TCH)



(*)

Reset T_MSRFPCI

RCHRA

Reset TTRAU


A30808-X3247-K41-1-7618 Prelim.07/2001 37

InformationSystem


1.2.4.4 Unsuccessful Inter-Cell Handover, Intra-BSC, with Loss of MS(Loss of HO CMD, T8<TTRAU), FR Call (T8 Expiry)


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8



Start THORQST

Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

Expiry T8

UNIHIRLC

HO CMD islost ...

DT1 (CL REQ)(Cause: radio interfacemessage failure)

DT1 (CL CMD)

DT1 (CL CMP)RELCN

RELRQ

RCHRL (Old TCH)

RCHRA

Call in progress

38 A30808-X3247-K41-1-7618 Prelim.07/2001





(*)

Reset T_MSRFPCI

Reset TTRAU

RCHRA

RLSD

RCHRL (New TCH)

RLC

Call release ...

A30808-X3247-K41-1-7618 Prelim.07/2001 39

InformationSystem


1.2.4.5 Unsuccessful Inter-Cell Handover, Intra-BSC with Loss of MS(Loss of HO CMD, T8>TTRAU), FR Call (TTRAU Expiry)


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8



Start THORQST

Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

NRFLTCH (8.)

HO CMD islost ...


DT1 (CL CMD)

Expiry TTRAU CONFL(Cause: remotetranscoder failure)

DT1 (CL CMP)

Call in progress

40 A30808-X3247-K41-1-7618 Prelim.07/2001





(*)

RELRQ

RELCN

RCHRA

RCHRL (New TCH)

RCHRL (Old TCH)

RCHRA

RLSD

RLC

Reset T_MSRFPCI

A30808-X3247-K41-1-7618 Prelim.07/2001 41

InformationSystem


1.2.4.6 Unsuccessful Inter-Cell Handover, Intra-BSC, with Loss of MS,Handover Access Failure (No SABM after Transmission ofPHYS INFO, [(NY1+1) * T3105]<<T8<TTRAU)


CHNAK

CHNAV (New TCH)

I (HO CMD) Start T8


HANDO

Start T3124

Start T3105


Start THORQST

Start TTRAU

Stop TTRAU (**)

Start T_MSRFPCI

UI (MEAS REP)

UI (PHYS INFO)

SACCH

DATRQ (HO CMD)

BWHCI

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

FACCH

Expiry T3105

Start T3105

Expiry T3105

UI (PHYS INFO)

(With HO cause)

FACCH

MTCHBUTI (1.) start

Call in progress

MS does not reactto PHYS INFO, noSABM is receivedat the BTS.


FACCH

42 A30808-X3247-K41-1-7618 Prelim.07/2001



MTCHBUTI (1.)(stop)AALTCHTI (1.)(stop)


(*)

RELRQ

RELCN

RCHRA

RCHRL (New TCH)

RCHRL (Old TCH)

RCHRA

RLSD

RLC

NRFLTCH (6.)


DT1 (CL CMD)

CONFL(Cause: HO accessfailure)

DT1 (CL CMP)

Start T3105

FACCH

Expiry T3105 (***)

UI (PHYS INFO)

Note: T3105 expires (NY1+1) times.(***)


A30808-X3247-K41-1-7618 Prelim.07/2001 43

InformationSystem


1.2.4.7 Successful Inter-Cell Handover (Intra-BSC) between ColocatedConcentric Cells, FR Call


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8


HANDOStart T3124


Start TTRAU

Stop TTRAU (**)

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

FACCH


UI (PHYS INFO)FACCH

Stop T3105ESTIN

TNTCHCL (1. forconcentric cells)

SABM

UA

FACCH

FACCH

Call in progress

PAREA

PAREQ

44 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI


Stop T8

DATIN (HO CMP)

SUCTCHSE (1.)

DT1 (HOPER)




(**)

(*)


RELRQ

RELCN

RCHRL (Old TCH)

RCHRA

I (HO CMP)FACCH


A30808-X3247-K41-1-7618 Prelim.07/2001 45

InformationSystem


1.2.4.8 Successful Inter-Cell Handover, Intra-BTSE, BetweenSynchronized Cells, FR Call


CHNAK

CHNAV (New TCH)

I (HO CMD)

MTCHBUTI (1.)(start)

Start T8


HANDO


Start THORQST

Start TTRAU

Stop TTRAU (**)

Start T_MSRFPCI

UI (MEAS REP)

HO ACCESS (***)

SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

HO ACCESS (***)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

FACCH

FACCH

FACCH

(Activation type: related tosynchronous handover)

(Synchronization Indicator:synchronized)

HO ACCESS (***)FACCH

HO ACCESS (***)FACCH

ESTINSABM

UAFACCH

FACCH TNTCHCL (1.)

Stop T8

DATIN (HO CMP)


I (HO CMP)FACCH

Call in progress

46 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI


SUCTCHSE (1.)

DT1 (HOPER)

Note: Subcounter depends on the handover cause value contained in the BWHCI.


(**)

(*)

Stop T_MSRFPCI

(With HO cause)

RELRQ

RELCN

RCHRL (Old TCH)

RCHRA


HO ACCESS is transmitted exactly 4 times.(***)

A30808-X3247-K41-1-7618 Prelim.07/2001 47

InformationSystem


1.2.4.9 Successful Inter-Cell Handover, Intra-BSC, MSC Controlled, FR Call

CHNAK

DT1 (HO RQD)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

CR (HO REQ)

I (HO CMD)

FACCH

CHNAV (New TCH)

HANDOFACCH


Call in progress

Start THORQST

BWHCI

(With HO cause)

Start T7

MTCHBUTI (1.) (start)Start TTRAU (**)

Start T_MSRFPCI CC (HO RAC; HO CMD)

AOUINIRH (*)

Stop T7

DATRQ (HO CMD)

Start T8

HO ACCESS

Stop TTRAU (**)

Start T3124

DT1 (HO CMD; HO CMD) (***)

ATTCHSEI (1.)if last TCH startAALTCHTI (1.)

48 A30808-X3247-K41-1-7618 Prelim.07/2001


ESTIN

DATIN (HO CMP)

MRPCI

DT1 (HO CMP)

DT1 (CL CMP)

DT1 (CL CMD)

Note: Subcounter depends on the handover cause value contained in the HANDOVER CONDITIONINDICATION.TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of MSC-controlled handover this isdone on the CHANNEL ACTIVATION ACKNOWLEDGE for the TCH in the target BTS.

(**)

(*)

FACCH

FACCH

FACCH

FACCH

(Cause: handoversuccessful)

HANDOVER COMMAND contains the BCCH and BSIC frequency of an internal neighbour cell.(***)


Stop T3124

PHYS INFO

Start T3105

Stop T3105

SABM

TNTCHCL (1.)

I (HO CMP)

UA

SUCTCHSE (1.)

Stop T8

SOUINIRH (*)

RELRQ

RELCN

RCHRL (Old TCH)

RCHRA

MTCHBUTI (stop)AALTCHTI (stop)

Stop T_MSRFPCI

A30808-X3247-K41-1-7618 Prelim.07/2001 49

InformationSystem


1.2.4.10 Successful SDCCH-SDCCH Inter-Cell Handover, Intra-BSC


CHNAK

CHNAV (New SDCCH)

I (HO CMD)Start T8

HANDO

Start T3124


NATTSDPEATINHIRC (*)If last SDCCH startASDCALTI

Start THORQST

Start T_MSRFPCI

UI (MEAS REP)

HO ACCESS

UI (PHYS INFO)

SACCH

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

SDCCH

SDCCH

SDCCH

SDCCH

(With HO cause)

BWHCI

DATRQ (HO CMD)


Stop T3105ESTIN

SABM

UA

SDCCH

SDCCH

SDCCH transaction or call in SDCCH phase in progress ...

Stop T8

DATIN (HO CMP)


I (HO CMP)FACCH

50 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI

ASDCALTI (stop)

NASUSDPE

DT1 (HOPER)


(*)


RELRQ

RELCN

RCHRL (Old SDCCH)

RCHRA


A30808-X3247-K41-1-7618 Prelim.07/2001 51

InformationSystem


1.2.4.11 Unsuccessful SDCCH-SDCCH Inter-Cell Handover Attempt,Intra-BSC, No SDCCH Available in Target Cell


NATTSDPEATSDCMBSATINHIRC (*)

......

......

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH


(*)

BWHCI

(With HO cause)

NATTSDPEATSDCMBSATINHIRC (*)

BWHCI

(With HO cause)

Start THORQST

Expiry THORQST

Call in progress


52 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.4.12 Unsuccessful SDCCH-SDCCH Inter-Cell Handover, Intra-BSC, withLoss of MS (Loss of HO CMD, T8 Expiry)


CHNAK

CHNAV (New SDCCH)

I (HO CMD)Start T8


NATTSDPEATINHIRC (*)If last SDCCH startASDCALTI

Start THORQST

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

BWHCI

(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

SDCCH

Expiry T8

UNIHIRLC

HO CMD islost ...


DT1 (CL CMD)

DT1 (CL CMP)RELCN

RELRQ

RCHRL (Old SDCCH)

RCHRA

Call in progress

A30808-X3247-K41-1-7618 Prelim.07/2001 53

InformationSystem



ASDCALTI (stop)


(*)

Reset T_MSRFPCI

RCHRA

RLSD

RCHRL (New SDCCH)

RLC

Call release ...

54 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.5 Inter-Cell Handover, Inter-BSC

1.2.5.1 Successful Inter-Cell Handover, Inter-BSC, FR Call

BTSold BTSnewMS

CHNAK

Start T7

Start T3124

HO ACCESS

DT1 (HO DET)

I (HO CMD)

HANDO

Stop T7

BSCnewBSCold MSC

ATINBHDO (*)

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH

BWHCI(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start TTRAU

Start T_MSRFPCI


ATTCHSEI (1.)If last TCH startAALTCHTI (1.)

Stop TTRAU (**)

CC (HO RAC; HO CMD)DT1 (HO CMD; HO CMD)

Start T8FACCH

FACCH

HO ACCESSFACCH

Start Trr7 (***)

CHNAV (New TCH)

UI (PHYS INFO)


FACCH

Call in progress

A30808-X3247-K41-1-7618 Prelim.07/2001 55

InformationSystem


BTSold BTSnewMS

I (HO CMP)

DATIN (HO CMP)

MRPCI

DT1 (HO CMP)

RELRQ

DT1 (CL CMD)

Stop T8

SUINBHDO (*)

BSCnewBSCold MSC

DT1 (CL CMP)RELCN

RCHRA

RLSD

SUCTCHSE (1.)



TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of inter-BSC handover this is done onthe CHANNEL ACTIVATION ACKNOWLEDGE for the TCH in the target BTS.

(**)

(*)


FACCH

Stop T_MSRFPCI

SABM

Stop T3105

TNTCHCL (1.)

ESTIN

UAFACCH

FACCH

Trr7 is an MSC timer which supervises the receipt of a HO CMP after transmission of a HO CMD.(***)

Stop Trr7 (***)

RLC

RCHRL (Old TCH)


56 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.5.2 Unsuccsessful Inter-Cell Handover, Inter-BSC, No TCHAvailable in Target Cell, FR Call

BTSold BTSnewMS

NRINHDFL

BSCnewBSCold MSC

ATTCHSEI (1.)

Start T7

DT1 (HO RQD)

CR (HO REQ)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

(Cause: no radioresource available)

CREF (HO FAI)

DT1 (HO RRJ)

Expiry T7

Call in progress


A30808-X3247-K41-1-7618 Prelim.07/2001 57

InformationSystem


1.2.5.3 Unsuccessful Inter-Cell Handover, Inter-BSC, with Reversionto Old TCH, FR Call (T3124 Expiry)

BTSold BTSnewMS BSCnewBSCold MSC

CHNAK

Start T7

Start T3124

HO ACCESS

I (HO CMD)

Stop T7

ATINBHDO (*)

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST



CC (HO RAC; HO CMD)

DT1 (HO CMD; HO CMD)

Start T8FACCH

FACCH

HO ACCESSFACCH


Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)Start Trr7 (***)

CHNAV (New TCH)

SABMESTINFACCH

Expiry T3124

Call in progress

58 A30808-X3247-K41-1-7618 Prelim.07/2001




DT1 (HO FAIL)

NRUNINHD

DT1 (CL CMD)

DT1 (CL CMP)

RLSD

RCHRA

RLC



(**)

(*)

UA

HO FAILDATIN (HO FAIL)

Stop T8

FACCH

FACCH(Cause: protocolerror unspecified)

(Cause: equip-ment failure)


RCHRL (New TCH)


Reset T_MSRFPCI

Stop Trr7 (***)

A30808-X3247-K41-1-7618 Prelim.07/2001 59

InformationSystem


1.2.5.4 Unsuccessful Inter-Cell Handover, Inter-BSC with Loss of MS(Loss of HO CMD, T8<Trr7), FR Call (T8 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

I (HO CMD)

Stop T7

BSCnewBSCold MSC

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start TTRAU

Start T_MSRFPCI



Stop TTRAU (**)

CC (HO RAC; HO CMD)

DT1 (HO CMD)

Start T8FACCHHO CMD islost ...

Start Trr7 (***)

Expiry T8

NRFLTCH (9.)

DT1 (CL REQ)

(Cause: radio interfacemessage failure)

CHNAV (New TCH)

ATINBHDO (*)

Call in progress

60 A30808-X3247-K41-1-7618 Prelim.07/2001


BTSold BTSnewMS

DT1 (CL CMD)

BSCnewBSCold MSC

DT1 (CL CMP)

RLSD

RLC



(**)

DATRQ (CHREL)

DESAC

RELIN

RCHRA

Expiry Trr7 (***)

DT1 (CL CMD)

DT1 (CL CMP)

RLSD

RCHRA

RLC


Trr7 is an MSC timer which supervises the receipt of a HO CMP after transmission of a HO CMD.Its value is hardcoded to 15 sec..

(***)


(*)

RCHRL (New TCH)

RCHRL (Old TCH)

Reset T_MSRFPCI

A30808-X3247-K41-1-7618 Prelim.07/2001 61

InformationSystem


1.2.5.5 Unsuccessful Inter-Cell Handover, Inter-BSC with Loss of MS(Loss of HO CMD, T8>Trr7), FR Call (Trr7 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

Stop T7

BSCnewBSCold MSC

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start TTRAU

Start T_MSRFPCI



Stop TTRAU (**)

CC (HO RAC; HO CMD)

DT1 (HO CMD)

Start T8

HO CMD islost ...

Start Trr7 (***)

Reset T8

DT1 (CL CMD)(Cause: call control)

Expiry Trr7

DT1 (CL CMP)

DT1 (CL CMD)

DT1 (CL CMP)


ATINBHDO (*)

I (HO CMD)FACCH

CHNAV (New TCH)

Call in progress

62 A30808-X3247-K41-1-7618 Prelim.07/2001



RLSD

RLC



(**)

DATRQ (CHREL)

DESAC

RELIN

RCHRA

RLSD

RCHRA

RLC


(***)


(*)

RCHRL (New TCH)

RCHRL (Old TCH)

Reset T_MSRFPCI

A30808-X3247-K41-1-7618 Prelim.07/2001 63

InformationSystem


1.2.5.6 Successful Inter-Cell Handover, Inter-BSC, No TCH Availablein First (external) Cell, Second Target Cell Belongs toOriginating BSC, FR Call

iThe red colour indicates the BSC serving the first (really external) target cell in the targetcell list of the HANDOVER REQUIRED message.

BTSold BSC BMS

CHNAK

BSC ABTSnew MSC

NRINHDFL

Start T7

DT1 (HO RQD)CR (HO REQ)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

ATTCHSEI (1.)ATCHSMBS (1.)

CREF (HO FAI)(Cause: no radio re-source available)

CR (HO REQ)

CC (HO RAC; HO CMD)Start T_MSRFPCI

Stop TTRAU (**)

Stop T7

AOUINIRH (*)

Start T8

Start TTRAU (**)

I (HO CMD)

FACCH

CHNAV (New TCH)

Call in progress

(belongs to BSC A) (belongs to BSC A)

Start T3124HANDOFACCH


ATTCHSEI (1.)if last TCH startAALTCHTI (1.)

DT1 (HO CMD; HO CMD) (***)

DATRQ (HO CMD)


HO ACCESS

64 A30808-X3247-K41-1-7618 Prelim.07/2001


ESTIN

DATIN (HO CMP)

MRPCI

DT1 (HO CMP)

DT1 (CL CMP)

SUCTCHSE (1.)

DT1 (CL CMD)


Stop T3105

Note: Subcounter depends on the handover cause value contained in the HANDOVER CONDITIONINDICATION.TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-BSC handover this is doneafter receipt of the HANDOVER DETECT message.

(**)

(*)

FACCH

FACCH

FACCH

FACCH

Stop T_MSRFPCI

Stop T8


RCHRL (Old TCH)

BTSold BSC BMS BSC ABTSnew MSC(belongs to BSC A) (belongs to BSC A)

HANDOVER COMMAND contains the BCCH and BSIC frequency of an internal neighbour cell.(***)

PHYS INFO

SABM

UA

I (HO CMP)

RELRQ

RELCN

RCHRA

MTCHBUTI (stop)AALTCHTI (stop)

SOUINIRH (*)

TNTCHCL (1.)

A30808-X3247-K41-1-7618 Prelim.07/2001 65

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1.2.5.7 Successful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC

BTSold BTSnewMS

CHNAK

Start T7

Start T3124

HO ACCESS

DT1 (HO DET)

I (HO CMD)

HANDO

Stop T7

BSCnewBSCold MSC

ATINBHDO (*)

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start T_MSRFPCI

NATTSDPEIf last SDCCH startASDCALTI

CC (HO RAC; HO CMD)DT1 (HO CMD; HO CMD)

Start T8SDCCH

SDCCH

HO ACCESSSDCCH

Start Trr7 (***)

CHNAV (New SDCCH)

UI (PHYS INFO)


SDCCH

Call in progress

(Channel type:SDCCH)

66 A30808-X3247-K41-1-7618 Prelim.07/2001


BTSold BTSnewMS

I (HO CMP)

DATIN (HO CMP)

MRPCI

DT1 (HO CMP)

RELRQ

DT1 (CL CMD)

Stop T8

SUINBHDO (*)

BSCnewBSCold MSC

DT1 (CL CMP)RELCN

RCHRA

RLSD

NASUSDPE

ASDCALTI


(*)


SDCCH

Stop T_MSRFPCI

SABM

Stop T3105

ESTIN

UASDCCH

SDCCH


Stop Trr7 (***)

RLC

RCHRL (Old SDCCH)


A30808-X3247-K41-1-7618 Prelim.07/2001 67

InformationSystem


1.2.5.8 Unsuccsessful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC,No SDCCH Available in Target Cell

BTSold BTSnewMS

NRINHDFL

BSCnewBSCold MSC

NATTSDPEATSDCMBS

Start T7

DT1 (HO RQD)

CR (HO REQ)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

(Cause: no radioresource available)

CREF (HO FAI)

DT1 (HO RRJ)

Expiry T7

Call in progress



Note: If the handover condition persists and another INTERCELL HANDOVER CONDITION INDICATIONis received from the BTS after expiry of T7, the same procedure is repeated in exactly the same way.

68 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.5.9 Unsuccessful SDCCH-SDCCH Inter-Cell Handover, Inter-BSC withLoss of MS (Loss of HO CMD, T8<Trr7, T8 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

I (HO CMD)

Stop T7

BSCnewBSCold MSC

DT1 (HO RQD)

CR (HO REQ)

DATRQ (HO CMD)

UI (MEAS REP)SACCH


UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start T_MSRFPCI

NATTSDPEIf last SDCCH startASDCALTI

CC (HO RAC; HO CMD)

DT1 (HO CMD)

Start T8SDCCHHO CMD islost ...

Start Trr7 (***)

Expiry T8

NRFLSDCC

DT1 (CL REQ)

(Cause: radio interfacemessage failure)

CHNAV (New SDCCH)

ATINBHDO (*)

Call in progress


A30808-X3247-K41-1-7618 Prelim.07/2001 69

InformationSystem


BTSold BTSnewMS

DT1 (CL CMD)

BSCnewBSCold MSC

DT1 (CL CMP)

RLSD

RLC

ASDCALTI

DATRQ (CHREL)

DESAC

RELIN

RCHRA

Expiry Trr7 (***)

DT1 (CL CMD)

DT1 (CL CMP)

RLSD

RCHRA

RLC



(***)


(*)

RCHRL (New SDCCH)

RCHRL (Old SDCCH)

Reset T_MSRFPCI

70 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.6 Intra-Cell Handover

1.2.6.1 Successful Intra-Cell Handover, FR Call

iNote: This message flow is valid for intra-cell handover due to quality,intra-cell handover complete <--> inner in concentric cells andintra-cell handover far <--> near in extended cells.The difference just consists in the handover cause.

BTS BSCMS MSC

WIHCI

CHNAK

DATRQ (ASS CMD)I (ASS CMD)

SABM

Start T10

ESTIN



UA

TNTCHCL (1.)

Start TTRAU

UI (MEAS REP)SACCH

(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start T_MSRFPCI

Old FACCH

New FACCH

New FACCH

Stop TTRAU (**)

CHNAV (New TCH)

ATINHIAC (*)

SINTHITA (*)SINHOBSC (*)

DATIN (ASS CMP)I (ASS CMP)

New FACCH

Call in progress

Stop T10

A30808-X3247-K41-1-7618 Prelim.07/2001 71

InformationSystem


BTS BSCMS MSC


RELRQ

RELCN

RCHRA

SUCTCHSE (1.)


(*)

(With HO cause)

MRPCI

Stop T_MSRFPCI

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-cell handover this is done afterreceipt of the ESTABLISH INDICATION for the target TCH.

(**)

DT1 (HOPER)

RCHRL (Old TCH)


72 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.6.2 Unsuccessful Intra-Cell Handover Due to Quality, No TCH Available,FR Call


WIHCI


ATTCHSEI (1.)(BTS new)ATINHIRC (*)If last TCH startAALTCHTI (1.)

BWHCI (**)

UI (MEAS REP)SACCH

(Cause:downlink/uplink

quality)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH


quality)


(*)

Only for intra-cell handover due to quality. An inter-cell handover due to quality is triggered, if thehandover conditions persist and the call is still on the old TCH when the next HANDOVER CONDITIONINDICATION is sent after expiry of THORQST.

(**)

Start THORQST

Expiry THORQST

Call in progress

Call continuation with inter-cell handover attempt

A30808-X3247-K41-1-7618 Prelim.07/2001 73

InformationSystem


1.2.6.3 Unsuccessful Intra-Cell Handover Due to Quality withReversion to Old TCH, FR Call

BTS BSCMS MSC

WIHCI

CHNAK


I (ASS FAIL)

Start T10

ESTIN


UNINHOIA (*)

Start TTRAU

UI (MEAS REP)SACCH

(Cause:downlink/uplinkquality)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start T_MSRFPCI

(Cause: protocolerror unspecified)

DATIN (ASS FAIL)

Stop T10

Old FACCH

Old FACCH

SABMOld FACCH

SABMNew FACCH

Access to targetchannel fails ...

UA


ATINHIAC (*)

CHNAV (New TCH)

Reset TTRAU

Reset T_MSRFPCI

RCHRL (New TCH)

Call in progress

74 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

UI (MEAS REP)SACCH

BWHCI (**)(Cause:downlink/uplinkquality)

Only for intra-cell handover due to quality. An inter-cell handover due to quality is triggered, if thehandover conditions persist and the call is still on the old TCH when the next HANDOVER CONDITIONINDICATION is sent after expiry of THORQST.

(**)

RCHRA

UI (MEAS REP)SACCH



(*)

Expiry THORQST

Call continuation with inter-cell handover attempt ...

A30808-X3247-K41-1-7618 Prelim.07/2001 75

InformationSystem


1.2.6.4 Unsuccessful Intra-Cell Handover with Loss of MS (Loss ofASS CMD, T10 < TTRAU), FR Call (T10 Expiry)

BTS BSCMS MSC

WIHCI

CHNAK

DATRQ (ASS CMD)I (ASS CMD)Start T10



DT1 (CL REQ)

RELCN

RCHRA

DT1 (CL CMD)

UNIHIALC

(Cause: radio interface

DT1 (CL CMP)

RELRQ RLSD

RLC

message failure)

Old FACCH


ATINHIAC (*)

UI (MEAS REP)SACCH

(With HO cause)

UI (MEAS REP)SACCH

Start THORQST

Start TTRAU

ASS CMDis lost ...

Start T_MSRFPCI

Reset TTRAU

Reset T_MSRFPCI

Expiry T10

CHNAV (New TCH)

RCHRL (New TCH)

Call in progress

76 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

RCHRA


(*)

MTCHBUTI (1.) (stop)

RCHRL (Old TCH)

A30808-X3247-K41-1-7618 Prelim.07/2001 77

InformationSystem


1.2.6.5 Unsuccessful Intra-Cell Handover with Loss of MS (Loss ofASS CMD, T10>TTRAU), FR Call (TTRAU Expiry)

BTS BSCMS MSC

WIHCI

CHNAK

DATRQ (ASS CMD)I (ASS CMD)Start T10



DT1 (CL REQ)

RELCN

RCHRA

DT1 (CL CMD)

Expiry TTRAU

NRFLTCH

(Cause: radio interface

DT1 (CL CMP)RELRQ

message failure)

Old FACCH

ATINHIAC (*)

UI (MEAS REP)SACCH

(With HO cause)

UI (MEAS REP)SACCH

Start THORQST

Start TTRAU

ASS CMDis lost ...

Start T_MSRFPCI

CONFL(Cause: remote

transcoder failure)

Reset T_MSRFPCI

CHNAV (New TCH)

RCHRL (New TCH)


Call in progress

78 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

RCHRA


(*)

RCHRL (Old TCH)

RLSD

RLC


A30808-X3247-K41-1-7618 Prelim.07/2001 79

InformationSystem


1.2.6.6 Successful Intra-Cell Handover Due to Quality, MSC Controlled,FR Call

BTS BSCMS MSC

DT1 (HO RQD)

Start T7

HANDO


CR (HO REQ)

CHNAKCC (HO RAC; HO CMD)


I (HO CMD)

HO ACCESS

Start T3124

HO ACCESS

DATRQ (HO CMD)

DT1 (HO DET)

WIHCI

CHNAV (New TCH)


UI (MEAS REP)SACCH


quality)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start T_MSRFPCI

Stop T7

Start T8

Stop TTRAU (**)

Old FACCH

New FACCH

New FACCH

Stop T3124

UI (PHYS INFO)

Start T3105

New FACCH

ESTIN

TNTCHCL (1.)

SABM

UA

Stop T3105New FACCH

New FACCH

Call in progress

80 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

I (HO CMP)

MRPCI

DATIN (HO CMP)

DT1 (HO CMP)

DT1 (CL CMD)

DT1 (CL CMP)RELRQ

RLSD

RLC

RELCN

RCHRL (Old TCH)

RCHRA

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of MSC controlled handover this isdone on the CHANNEL ACTIVATION ACKNOWLEDGE for the TCH in the target BTS.

(**)


New FACCH


Stop T_MSRFPCI


Stop T8

A30808-X3247-K41-1-7618 Prelim.07/2001 81

InformationSystem


1.2.6.7 Successful SDCCH-SDCCH Intra-Cell Handover

BTS BSCMS MSC

WIHCI

CHNAK


SABM

Start T10

ESTIN

NATTSDPEASDCALTI (start)

UA

UI (MEAS REP)SACCH

(With HO cause)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start THORQST

Start T_MSRFPCI

Old SDCCH

New SDCCH

New SDCCH

CHNAV (New SDCCH)

ATINHIAC (*)

SINTHITA (*)SINHOBSC (*)


New SDCCH

Call in progress

Stop T10

NASUSDPE(With HO cause)

MRPCI

Stop T_MSRFPCI

DT1 (HOPER)

82 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

ASDCALTI (stop)

RELRQ

RELCN

RCHRA


(*)

RCHRL (Old SDCCH)


A30808-X3247-K41-1-7618 Prelim.07/2001 83

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1.2.7 Directed Retry, Intra-BSC

1.2.7.1 Successful Directed Retry, Intra-BSC, FR Call


CHNAK

CHNAV (New TCH)

I (HO CMD)

MTCHBUTI (1.)

Start T8

AOUINIRH(7.)

DATIN (HO DETECT)

Start T3124

ATINHIRC (7.)ATTCHSEI (1.)If last TCH startAALTCHTI (1.) (**)

Start TTRAU

Stop TTRAU (***)

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

FHREQ

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

SDCCH

FACCH

Start T3105

UI (PHYS INFO)FACCH

DT1 (ASS REQ)

BWHCI

(Cause: ’forced’, target cell list)

ATTCHSEI (1.) (*)ATCHSMBS (1.) (*)TASSATT (2.)

Start TIMERFHO

HO ACCESSFACCH

(Contains CGI of BTS0and GSM08.08 cause

’forced’)

Stop T3124

Stop T3105

SABM

UA

FACCH

FACCH

ESTIN

TNTCHCL (1.)

Call setup ...

84 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI


Stop T8

DATIN (HO CMP)


DT1 (ASS CMP)

SOUINIRH (7.)SININIRHSINHOBSC (7.)SINTHINT (7.)

Stop T_MSRFPCI

RELRQ

RELCN

RCHRL (SDCCH)

RCHRA

I (HO CMP)FACCH

DATRQ (CHMM)I (CHMM)

FACCH

I (CHMMACK)FACCH

DATIN (CHMMACK)

I (ALERT)FACCH

DT1 (ALERT)

DT1 (CONNECT)DATRQ (ALERT)

I (CONNECT)FACCH

DATRQ (CONNECT)

DT1 (CONACK)

I (CONACK)FACCH DATIN (CONACK)

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-BSC directed retry this is doneon receipt of the HANDOVER DETECT message.

(***)


Event is counted for the target cell.(**)Event is counted for the serving cell.(*)

A30808-X3247-K41-1-7618 Prelim.07/2001 85

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1.2.7.2 Unsuccessful Directed Retry, No Target Cell Available, FR Call

BTS BSCMS MSC

FHREQ

BWHCI

DT1 (DISC)DATRQ (DISC)

I (DISC)

TASSFAIL (8.)

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

SDCCH

DT1 (ASS REQ)


DT1 (ASS FAI)

(Cause: no radio resourceavailable)

(Cause: ’forced’, emptytarget cell list)

UI (MEAS REP)SACCH

Call setup ...

Call release ...

86 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.7.3 Unsuccessful Directed Retry, 1 Target Cell Available, TargetCell Congested, FR Call


I (DISC)

TASSFAIL (8.)

ATINHIRC (7.)ATTCHSEI (1.) (**)ATCHSMBS (1.) (**)

UI (MEAS REP)SACCH FHREQ

UI (MEAS REP)SACCH

SDCCH

DT1 (ASS REQ)

BWHCI



DT1 (ASS FAI)(Cause: no radio re-

source available)

DT1 (DISC)(Cause: normal,

unspecified)DATRQ (DISC)

Event is counted for the target cell.(**)

Event is counted for the serving cell.(*)

UI (MEAS REP)SACCH

Call setup ...

Call release ...

A30808-X3247-K41-1-7618 Prelim.07/2001 87

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1.2.7.4 Unsuccessful Directed Retry, Intra-BSC, with Reversion toSDCCH, FR Call (T3124 Expiry)


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8

AOUINIRH (7.)AININIRH

Start T3124

ATINHIRC (7.)ATTCHSEI (1.) (**)If last TCH startAALTCHTI (1.) (**)

Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

FHREQUI (MEAS REP)

SACCH

UI (MEAS REP)SACCH

SDCCH

DT1 (ASS REQ)

BWHCI



Start TIMERFHO

HO ACCESSFACCH


’forced’)

HO ACCESSFACCH

Expiry T3124

HO ACCESSdoes notget through

ESTINSABM

SDCCH

UASDCCH

Call setup ...

88 A30808-X3247-K41-1-7618 Prelim.07/2001



RCHRL (New TCH)

Stop T8

HOFITABSUNINHOIE (7.)

RCHRA

I (HO FAIL)

Reset TTRAU

SDCCH DATIN (HO FAIL)(Cause: protocol

error, unspecified)

DT1 (ASS FAI)

(Cause: radio interfacefailure - reversion to old

channel)

TASSFAIL (7.)

Reset T_MSRFPCI


DT1 (DISC)

SDCCH

DATRQ (DISC)I (DISC)(Cause:normal,

unspecified)



Call release ...

A30808-X3247-K41-1-7618 Prelim.07/2001 89

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1.2.7.5 Unsuccessful Directed Retry, Intra-BSC, with Loss of MS(Loss of HO CMD, T8 < TTRAU), FR Call (T8 Expiry)


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8



Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

FHREQUI (MEAS REP)

SACCH

UI (MEAS REP)SACCH

SDCCH

DT1 (ASS REQ)

BWHCI



Start TIMERFHO


’forced’)

HO CMDis lost ...

Expiry T8

UNIHIRLC

DT1 (CL REQ)(Cause: radio interface

message failure)

DT1 (CL CMD)

Call setup ...

90 A30808-X3247-K41-1-7618 Prelim.07/2001



RCHRL (New TCH)

RCHRA

Reset TTRAU

Reset T_MSRFPCI


DT1 (CLCMP)

RELRQ

RELCN

RCHRL (SDCCH)

RCHRA

Reset TIMERFHO

RLSD

RLC



A30808-X3247-K41-1-7618 Prelim.07/2001 91

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1.2.7.6 Unsuccessful Directed Retry, Intra-BSC, with Loss of MS(Loss of HO CMD, T8 > TTRAU), FR Call (TTRAU Expiry)


CHNAK

CHNAV (New TCH)

I (HO CMD)


Start T8


Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

FHREQUI (MEAS REP)

SACCH

UI (MEAS REP)SACCH

SDCCH

DT1 (ASS REQ)

BWHCI

(Cause: ’forced’)


Start TIMERFHO


’forced’)

HO CMD islost ...

DT1 (CL REQ)(Cause: radio interface

message failure)

DT1 (CL CMD)

Expiry TTRAU CONFL(Cause: remote

transcoder failure) NRFLTCH (8.)

DT1 (CLCMP)


Call setup ...

92 A30808-X3247-K41-1-7618 Prelim.07/2001



RCHRL (New TCH)

RCHRA

Reset T_MSRFPCI


RELRQ

RELCN

RCHRL (SDCCH)

RCHRA

RLSD

RLC



A30808-X3247-K41-1-7618 Prelim.07/2001 93

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1.2.8 Directed Retry, Inter-BSC

1.2.8.1 Successful Directed Retry, Inter-BSC, FR Call

BTSold BTSnewMS

CHNAK

Start T7

BSCnewBSCold MSC


UI (MEAS REP)SACCH

BWHCIUI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start TTRAU

Start T_MSRFPCI


Stop TTRAU (**)

DT1 (ASS REQ)

(Cause: ’forced’) DT1 (ASS FAI)

(Cause: directed retry)

TASSFAIL (9.)





FHREQ

Start TIMERFHO

CHNAV (New TCH)

I (HO CMD)SDCCH

ATINBHDO (7.)

DATRQ (HO CMD)

Start T8

Stop T7

CC (HO RAC; HO CMD)


Start Trr7 (***)

Call setup ...

94 A30808-X3247-K41-1-7618 Prelim.07/2001


BTSold BTSnewMS

Start T3124

HO ACCESS

DT1 (HO DET) HANDO

BSCnewBSCold MSC

FACCH

I (HO CMP)

DATIN (HO CMP)FACCH

SABM

UI (PHYS INFO)


Stop T3105

TNTCHCL (1.)

ESTIN

UAFACCH

FACCH

FACCH

DT1 (HO CMP)DT1 (CL CMD)

Stop T8

SUINBHDO (7.)

SUCTCHSE (1.)(Cause: handover

successful) MRPCI

Stop T_MSRFPCI

DATRQ (CHMM)

DATIN (CHMMACK)

I (CHMM)FACCH

I (CHMMACK)FACCH

Release of resources...

DT1 (ALERT)DATRQ (ALERT)

I (ALERT)FACCH


I (CONNECT)FACCH

A30808-X3247-K41-1-7618 Prelim.07/2001 95

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TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of inter-BSC directed retry this is doneon the CHANNEL ACTIVATION ACKNOWLEDGE for the TCH in the target BTS.

(**)

DATIN (CONACK)DT1 (CONACK)

I (CONACK)FACCH


96 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.8.2 Unsuccessful Directed Retry, Inter-BSC, with Reversion toSDCCH, FR Call (T3124 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

Stop T7

BSCnewBSCold MSC


UI (MEAS REP)SACCH

BWHCI

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start TTRAU

Start T_MSRFPCICC (HO RAC; HO CMD)


FHREQ

DT1 (ASS REQ)

(Cause: ’forced’)DT1 (ASS FAI)


TASSFAIL (9.)

(Cause: directed retry)(Cause: directed retry)


Start Trr7 (***)


I (HO CMD)SDCCH

ATINBHDO (7.)

DATRQ (HO CMD)

Start T8

Start TIMERFHO

CHNAV (New TCH)

Call setup ...


A30808-X3247-K41-1-7618 Prelim.07/2001 97

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BTSold BTSnewMS

HO ACCESS

BSCnewBSCold MSC

FACCH

SABMESTIN

UASDCCH

SDCCH

Stop T8

NRUNINHD

DT1 (HO FAIL)

RCHRA

RLSD


RLC

HO ACCESSFACCH


Expiry T3124

I (HO FAIL)SDCCH

DATIN (HO FAIL)

(Cause: ab-normal R,timer expired)

(Cause: radio interfacefailure, reversion to oldchannel)

DT1 (CL CMD)

(Cause: equipmentfailure)

DT1 (CL CMP)

Reset TIMERFHO

Reset T_MSRFPCI


RCHRL (New TCH)

Call release ...

CL CMD


98 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.8.3 Unsuccessful Directed Retry, Inter-BSC, with Loss of MS(Loss of HO CMD, T8 < Trr7), FR Call (T8 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

Stop T7

BSCnewBSCold MSC


UI (MEAS REP)SACCH

BWHCI

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)CC (HO RAC; HO CMD)DT1 (HO CMD; HO CMD)

DT1 (ASS REQ)

(Cause: ’forced’)DT1 (ASS FAI)


TASSFAIL (9.)

(Cause: directed retry)(Cause: directed retry)


Start Trr7 (***)


I (HO CMD)SDCCH

ATINBHDO (7.)

DATRQ (HO CMD)

Start T8

HO CMD islost ...

Start TIMERFHO

FHREQ

CHNAV (New TCH)

Call setup ...


A30808-X3247-K41-1-7618 Prelim.07/2001 99

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DT1 (CLREQ)

Expiry T8

(Cause: radio interfacemsg. failure)

DESAC

DT1 (CL CMD)

RELIN

RCHRA

RLSD


RLC

NRSLSDCC

DATRQ (CHREL)

(Cause: abnormalrelease, unspecified)

DT1 (CL CMP)

Expiry Trr7

RCHRL

RCHRA


DT1 (CL CMD)(Cause: equipmentfailure)

Reset TIMERFHO

Reset T_MSRFPCI

RLSD

RLC

DT1 (CL CMP)


RCHRL (New TCH)

100 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.8.4 Unsuccessful Directed Retry, Inter-BSC, with Loss of MS(Loss of HO CMD, T8 > Trr7), FR Call (Trr7 Expiry)

BTSold BTSnewMS

CHNAK

Start T7

BSCnewBSCold MSC


UI (MEAS REP)SACCH

BWHCI

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start TIMERFHO

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

FHREQ

DT1 (ASS REQ)

(Cause: ’forced’) DT1 (ASS FAI)


TASSFAIL (9.)





CHNAV (New TCH)

Call setup ...


A30808-X3247-K41-1-7618 Prelim.07/2001 101

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BTSold BTSnewMS

I (HO CMD)

BSCnewBSCold MSC

SDCCH

Reset T8

(Cause:equipment failure)

RELRQ

DT1 (CL CMD)

RELCN

RCHRA

RLSD


RLC

ATINBHDO (7.)

DATRQ (HO CMD)

Start T8HO CMD islost ...

DT1 (CL CMP)RCHRA


Reset TIMERFHO

Reset T_MSRFPCI

Expiry Trr7


DT1 (CL CMD)

DT1 (CL CMP)


Stop T7

CC (HO RAC; HO CMD)


Start Trr7 (***)

RLSD

RLC

RCHRL (New TCH)

RCHRL (SDCCH)

102 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.9 Forced Handover Due to O & M

1.2.9.1 Successful Forced Handover Due to O & M


CHNAK

CHNAV (New TCH)

I (HO CMD)

MTCHBUTI (1.)

Start T8

AOUINIRH(6.)

DATIN (HO DETECT)

Start T3124

ATINHIRC (8.)ATTCHSEI (1.)If last TCH startAALTCHTI (1.) (**)

Start TTRAU

Stop TTRAU (***)

Start T_MSRFPCI

UI (MEAS REP)SACCH

DATRQ (HO CMD)

FHREQ

HO ACCESS

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

SDCCH

FACCH

Start T3105

UI (PHYS INFO)FACCH

BWHCI


Start TIMERFHO

HO ACCESSFACCH


’forced’)

Stop T3124

Stop T3105

SABM

UA

FACCH

FACCH

ESTIN

TNTCHCL (1.)

Call in progress, operator initiated shutdown of a BTS, TRX or TCH

A30808-X3247-K41-1-7618 Prelim.07/2001 103

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MRPCI

Stop T8

DATIN (HO CMP)

DT1 (HO PER)

SOUINIRH (6.)SININIRHSINHOBSC (12.)SINTHINT (8.)

I (HO CMP)FACCH

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-BSC directed retry this is doneon receipt of the HANDOVER DETECT message.

(***)


Event is counted for the target cell.(**)Event is counted for the serving cell.(*)

(Cause: O & Mintervention)

104 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.9.2 Successful Forced Handover Due to O & M, Inter-BSC, FR Call

BTSold BTSnewMS

CHNAK

Start T7

BSCnewBSCold MSC


UI (MEAS REP)SACCH

BWHCIUI (MEAS REP)SACCH

UI (MEAS REP)SACCH

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (**)

(Cause: ’forced’)

(Cause: O & Mintervention)

(Cause: O & M inter-vention)



FHREQ

Start TIMERFHO

CHNAV (New TCH)

I (HO CMD)SDCCH

ATINBHDO (8.)

DATRQ (HO CMD)

Start T8

Stop T7

CC (HO RAC; HO CMD)


Start Trr7 (***)

Call in progress, operator initiated shutdown of a BTS, TRX or TCH

Start T3124

HO ACCESS

DT1 (HO DET) HANDOFACCH

SABM

UI (PHYS INFO)


Stop T3105FACCH

FACCH

A30808-X3247-K41-1-7618 Prelim.07/2001 105

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I (HO CMP)

DATIN (HO CMP)FACCH

TNTCHCL (1.)

ESTIN

UAFACCH

DT1 (HO CMP)DT1 (CL CMD)

Stop T8

SUINBHDO (8.)

SUCTCHSE (1.)(Cause: handover

successful) MRPCI

Stop T_MSRFPCI

Release of resources in originating cell and call continuation in target cell ...

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of inter-BSC directed retry this is doneon the CHANNEL ACTIVATION ACKNOWLEDGE for the TCH in the target BTS.

(**)

106 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.9.3 Successful Forced Intra-Cell Handover Due to O & M, FR Call

BTS BSCMS MSC

CHNAK


SABM

Start T10

ESTIN


UATNTCHCL (1.)

Start TTRAU

Start T_MSRFPCI

Old FACCH

New FACCH

New FACCH

Stop TTRAU (**)

CHNAV (New TCH)

ATINHIAC (7.)

SINTHITA (7.)SINHOBSC (12.)


New FACCH

Call in progress, operator initiated shutdown of a TRX or TCH

Stop T10

TTRAU is stopped when the BTS receives the (idle) TRAU frames from the TRAU. This happens whenthe BSC throughconnects the Asub-TCH to the Abis-TCH. In case of intra-cell handover this is done afterreceipt of the ESTABLISH INDICATION for the target TCH.

(**)



RELRQ

RELCN

RCHRA

SUCTCHSE (1.)(Cause): O & Mintervention

MRPCI

Stop T_MSRFPCI

DT1 (HOPER)

RCHRL (Old TCH)

A30808-X3247-K41-1-7618 Prelim.07/2001 107

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1.2.10 Queuing & Preemption

1.2.10.1 Queuing: Queued Assignment Request for FR TCH Is Served BeforeT11 Expiry, Directed Retry Enabled But No Target Cell Available,Preemption Disabled or Not Allowed for the Requesting Call

BTS BSCMS MSC

DT1 (ASS REQ)

Start T11

Start T_MSRFPCI

Stop T11

DT1 (QUIND)BWHCI

PHCRQ

CHNAK

DATRQ (PROGRES)

I (PROGRES)

DT1 (PROGRES)

All TCHs in the BTS are busy...

SDCCH

Start TTRAU

Stop TTRAU (**)

MDURTCRQ (1.) (start)

PHCCN

FHREQ


(Queuing allowedindicator=allowed)

(Cause: forced,no target cell included)

BTS congestion ends during runtime of T11, 1 TCH becomes idle again...

MDURTCRQ (1.) (stop)

CHNAV


DATRQ (ASS CMD)

I (ASS CMD)SDCCH

108 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

Stop T_MSRFPCI

FACCH

FACCH

SABM

UATNTCHCL (1.)

ESTIN

MRPCI

FACCH


DT1 (ASS CMP)


Call setup completion ...


(**)

A30808-X3247-K41-1-7618 Prelim.07/2001 109

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1.2.10.2 Queuing: Queued Assignment Request for FR TCH Is Discardedfrom the Queue Before T11 Expiry Due to an Incoming FRAssignment Request with Higher Priority Directed Retry EnabledBut No Target Cell Available, Preemption Disabled or Not Allowedfor the Requesting Call

iThe blue colour indicates the events related to the second (high priority) call.

BTS BSCMS MSC

DT1 (ASS REQ)

Start T11 (low prio call)

DT1 (QUIND)BWHCI

DATRQ (PROGRES)

I (PROGRES)

DT1 (PROGRES)


SDCCH


FHREQ




All places in the queue are occupied after the first call...

First call:low priority

DT1 (ASS REQ)*

Stop T11 (low prio call)

BWHCI*

MDURTCRQ (1.) (start)*

FHREQ*

ATTCHSEI (1.)*ATCHSMBS (1.)*TASSATT (2.)*


Second call:high priority

NMSGDISQ (1.)MDURTCRQ (1.)(stop)

Start T11* (high prio call)

110 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

High priority call remains queued...*

DATRQ (PROGRES)*

I (PROGRES)*

DT1 (PROGRES)*

SDCCH


Events related to second (high priority) call(*)

DT1 (ASS FAI)

DT1 (QUIND)*

A30808-X3247-K41-1-7618 Prelim.07/2001 111

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1.2.10.3 Queuing: Queued Assignment Request for FR TCH Is Discardedfrom Queue Due to T11 Expiry, Directed Retry Enabled But NoTarget Cell Available, Preemption Disabled or Not Allowed for theRequesting Call

BTS BSCMS MSC

DT1 (ASS REQ)

Start T11

Expiry T11

DT1 (QUIND)BWHCI

DATRQ (PROGRES)

I (PROGRES)

DT1 (PROGRES)


SDCCH


FHREQ




NMSGDISQ (1.)MDURTCRQ (1.)(stop)

DT1 (CL REQ)


DT1 (CL CMD)


Release of the queued context...

112 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.10.4 Queuing: Queued Handover Request for FR TCH Is Served BeforeTQHO Expiry, Preemption Disabled or Not Allowed for theRequesting Call

BTS oldBSCnew MSCMS BSC

CR (HO REQ)

Start TQHO


CC (QUIND)


(Queuing allowedindicator=not allowed )*

(Cause: no radio resourceavailable)

CREF (HO FAI)

NRINHDFL

CR (HO REQ)(Queuing allowedindicator=allowed )*



BTS congestion ends during runtime of TQHO, 1 TCH becomes idle again...

Stop TQHO

MDURTCRQ (3.) (stop)

CHNAV

Start TTRAUCHNAK

Start T_MSRFPCI

DT1 (HO RAC; HO CMD)


Completion of Handover procedure...

DT1 (HO RQD)

A30808-X3247-K41-1-7618 Prelim.07/2001 113

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In case of MSC-controlled handover the MSC cyclically attempts the HANDOVER REQUEST proce-dure towards all target cells previously received in the HANDOVER REQUIRED message from theoriginating BSC. For the first cycle, the SIEMENS MSC generally sets the ‚queuing allowed indicator‘to ‚not allowed‘. If in this first cycle the request for radio resoucres fails for all target cells, the SIEMENSMSC repeats the cycle again, this time, however, with the ‚queuing allowed indicator‘ set to ‚allowed‘.This is done to avoid an unnecessary delay in the handover execution and in order to use the queuingmechanism as the very last measure to rescue a call.

(*)

114 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.10.5 Queuing: Queued Handover Request for FR TCH Is Discarded fromthe Queue Before TQHO Expiry Due to an Incoming FR Call withHigher Priority, Preemption Disabled or Not Allowed for theRequesting Calls

iThe blue colour indicates the events related to the high priority call.


CR (HO REQ)

Start TQHO


DT1 (QUIND)*



CC (QUIND)



All places in the queue are occupied after the handover request...

Stop TQHO (low prio call)

NMSGDISQ (3.)MDURTCRQ (3.) (stop)

FHREQ*

BWHCI*

DT1 (ASS REQ)*


High prioritycall

RLSD (HO FAI)(Cause: no radioresource available)

MDURTCRQ (1.) (start)*

Start T11* (high prio call)

NRINHDFL

A30808-X3247-K41-1-7618 Prelim.07/2001 115

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RLC

DATRQ (PROGRES)*

High priority call remains queued...*

DT1 (PROGRES)*

I (PROGRES)*SDCCH

Events related to high priority call(*)

116 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.10.6 Queuing: Queued Handover Request for FR TCH Is Discarded fromthe Queue Due to TQHO Expiry, Preemption Disabled or NotAllowed for the Requesting Calls


CR (HO REQ)

Start TQHO




CC (QUIND)


Release of the queued context...

NMSGDISQ (3.)MDURTCRQ (3.) (stop)

Expiry TQHO

RLSD (HO FAI)

RLC

(Cause: no radioresource available)NRINHDFL

A30808-X3247-K41-1-7618 Prelim.07/2001 117

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1.2.10.7 Preemption: Successful Forced Inter-Cell Handover Due toPreemption, Preempted Assignment Request and Preempting CallAre Both FR

iThe blue colour indicates the events related to preemting call.


CHNAK

CHNAV

I (HO CMD)


AININIRHAOUINIRH (7.)

ATTCHSEI (1.)ATINHIRC (7.)If last TCH startAALTCHTI (1.)

DATRQ (HO CMD)

BWHCI

(Cause: forced, BTSnew included)

FACCH

DT1 (ASS REQ)*

All TCHs in the old BTS are busy...

(Preemption allowedindicator=allowed)

FHREQ


SININIRHSINTHINT (7.)SOUINIRH (7.)SINHOBSC (7.)

Continuation of inter-cell handover procedure for preempted call...

FACCH

I (HO CMP)DATIN (HO CMP)

Start T8

Stop T8

118 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI

I (ASS CMD)*

MTCHBUTI (start)*

DATRQ (ASS CMD)*

SDCCH

Completion of Assignment procedure for preempting call...

RELRQ

RELCN

RCHRL

RCHRA

MTCHBUTI (stop)PHCRQ*

PHCCN*

CHNAV*

CHNAK*Start TTRAU*

Start T_MSRFPCI*

Events related to preemting call(*)

Start T10*

HOPER(Cause: Preemption)

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1.2.10.8 Preemption: Forced Release of Preempted Call Due to Lack ofTarget Cell for Forced Inter-Cell Handover Procedure, Preemptedand Preempting Call Are Both FR



BWHCI

(Cause: forced, no target cell)

DT1 (ASS REQ)*


(Preemption allowedindicator=allowed)

FHREQ


Release of preempted call...

DT1 (CL REQ)(Cause: preemption)

DT1 (CL CMD)(Cause: preemption)

Completion of Assignment procedure for preempting call...

I (ASS CMD)*

MTCHBUTI (start)*

DATRQ (ASS CMD)*

SDCCH

PHCRQ*

PHCCN*

CHNAV*

CHNAK*

Start T_MSRFPCI*


Start T10*

Start T10*

120 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.10.9 Preemption: Successful Forced Inter-BSC Handover Due toPreemption, Preempting Handover Request and Preempted CallAre Both FR, Originating BSC of the Preempting Handover Requestand Target BSC for the Forced Handover Are the Same


BTSold BTSnewMS

CHNAK

Start T7

BSCnewBSCold MSC

CR (HO REQ)*

DT1 (HO RQD)*

DATRQ (HO CMD)

BWHCI(Cause: forced,external targetcell included)

I (HO CMD)FACCH

Start T_MSRFPCI

ATTCHSEI (1.)*ATCHSMBS (1.)*

CC (HO RAC; HO CMD)

DT1 (HO RQD)

Start Trr7 (***)

ATINBHDO (7.)

CHNAV


FHREQ


(Preemptionindicator=allowed)

(Cause: Preemption- CR (HO REQ)

(Cause: Preemption )


Stop T7

Continuation of inter-BSC handover procedures for preempted call...

I (HO CMP)FACCH

SUCTCHSE (1.)

Start T8

A30808-X3247-K41-1-7618 Prelim.07/2001 121

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RLSD

DT1 (CL CMP)

RELRQ

RCHRL

CHNAK*

RCHRA

RELCN

Continuation of preempting incoming MSC-controlled handover procedure...


(**)



Start TTRAU*

Stop TTRAU*Start Trr7 (***)

Start T_MSRFPCI*

MTCHBUTI (1.)*

Start T8

RLCCHNAV*

CC (HO RAC; HO CMD)*

DT1 (HO CMD; HO CMD)*

ATINBHDO (*)

I (HO CMD)*FACCH

SUINBHDO (7.)

DT1 (CL CMD)

(Cause: handoversuccessful)Stop T8

DT1 (HO CMP)

Stop Trr7 (***)

122 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.11 HSCSD

1.2.11.1 Successful HSCSD Call, Mobile Originating, 3 TCHs Used

BTS BSCMS MSC

CHNRD


NSUCCHPC (4.)

CHNREQ

UI (IMASS)

SABM (CMSREQ)

UAESTIN (CMSREQ)

CHNAV (SDCCH)

CHNAK

IACMD (IMASS)


RACH

AGCH

SDCCH

SDCCH

DT1 (CLUPD)

I (CIMCMD)

I (CLAMCH)

ENCRY (CIMCMD)

MRPCI

DATIN (CLAMCH)

CR (CL3I; CMSREQ)

CC (CICMD)

SDCCH

SDCCH

DATIN (SETUP)SETUP

DT1 (SETUP)

DT1 (CPROC)

SDCCH


SDCCH

DT1 (CICMP)DATIN (CIMCMP)SDCCH

I (CIMCMP)

ATTCHSEI (1.) (*)TASSATT (2.)If last TCH startAALTCHTI (1.)

DT1 (ASREQ)

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BTS BSCMS MSC

I (ASS CMD)

PHCRQ

PHCCN

CHNAV (mCH) (**)

DATRQ (ASS CMD)

MTCHBUTI (1.) (start) (*)

SDCCH

Start TTRAU

Start T_MSRFPCI

Stop TTRAU (***)

SABM

UA

ESTIN

TNTCHCL (1.)TNMSCNCL (3.)

FACCH

FACCH

(Activation type: relatedto normal assignmentprocedure)

CHNAV (sCH1) (**)

Start TTRAU(Activation type: relatedto multislot configuration)

CHNAV (sCH2) (**)

Start TTRAU(Activation type: related tomultislot configuration)

CHNAK (mCH) (**)

CHNAK (sCH1) (**)

CHNAK (sCH2) (**)

Start T_MSRFPCI

Start T_MSRFPCI

I (ASS CMP)

SUCTCHSE (1.) (*)TASSSUCC (2.)

DATIN (ASS CMP)DT1 (ASS CMP)FACCH

124 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

I (CONACK)

RELCN

DT1 (ALERT)

I (ALERT)

RELCHRL

RCHRA

DATRQ (ALERT)

DATIN (CONACK) DT1 (CONACK)

ASDCALTI(stop)

DT1 (CONNECT)DATRQ (CONNECT)I (CONNECT)

RELRQ

FACCH

FACCH

FACCH

Call phase ...

Note: This counter counts as many events as TCHs are used for the HSCSD call.(*)

mCH = main channelsCH1 = 1. secondary channelsCH2 = 2. secondary channel

(**)


(***)

MRPCI (mCH) (**)

Stop T_MSRFPCI

MRPCI (sCH1) (**)

Stop T_MSRFPCI

MRPCI (sCH2) (**)

Stop T_MSRFPCI

A30808-X3247-K41-1-7618 Prelim.07/2001 125

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1.2.11.2 Successful Inter-cell Handover of an HSCSD Call (3 TCHs Used),Intra-BSC


CHNAK (mCH) (**)

CHNAV (mCH) (**)


ATTCHSEI (1.) (****)ATINHIRC (*)If last TCH startAALTCHTI (1.)

Start THORQST

Start TTRAU

Start T_MSRFPCI

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

UI (MEAS REP)SACCH

(With HO cause)

BWHCI

CHNAV (sCH)1 (**)


CHNAV (sCH2) (**)


CHNAK (sCH1) (**)

Start T_MSRFPCI

CHNAK (sCH2) (**)

Start T_MSRFPCI

I (HO CMD)Start T8


FACCH

DATRQ (HO CMD)

HANDO

Start T3124

Stop TTRAU (**)

HO ACCESS

HO ACCESSFACCH

FACCH

Call in progress

126 A30808-X3247-K41-1-7618 Prelim.07/2001



MRPCI (mCH) (**)

Stop T8

DATIN (HO CMP)

SUCTCHSE (1.) (****)

DT1 (HOPER)


Stop T3105ESTIN

Stop T_MSRFPCI

(With HO cause)

I (HO CMP)

SABM

UA

FACCH

FACCH

FACCH


UI (PHYS INFO)FACCH

MRPCI (sCH1) (**)

Stop T_MSRFPCI

MRPCI (sCH2) (**)

Stop T_MSRFPCI

RELRQ

RELCN

TNTCHCL (1.)TNMSCNCL (3.)

A30808-X3247-K41-1-7618 Prelim.07/2001 127

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(***)

(*)


(**)

Note: This counter counts as many events as TCHs are used for the HSCSD call.(****)

Note: The number of the channels to be released in the old cell depends on the number of TCHs usedfor the HSCSD call in the old cell (the number of TCHs used can change during the handover proce-dure, depending on the number of channels available).

(*****)

(*****)

RCHRL

RCHRA

RCHRL


RCHRL

RCHRA


RCHRA


128 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.11.3 Forced Intra-cell Handover During HSCSD Assignment Procedure

BTS BSCMS MSC

HSCSD call setup (see 1.2.11.1)

ATTCHSEI (1.) (*)TASSATT (2.)If last TCH startAALTCHTI (1.)

DT1 (ASREQ) (****)

CHNAV (new TCH)

Start TTRAUCHNAK

Start T_MSRFPCI

I (ASS CMD)DATRQ (ASS CMD)

Old FACCH

Stop TTRAU (***)

SABM

UA

ESTIN

TNTCHCL (1.)New FACCH

New FACCH

I (ASS CMP)DATIN (ASS CMP)New FACCH

SINTHITA (7.)SINHOBSC (12.)

Not enoughadjacentTCHs

MRPCI

Stop T_MSRFPCI

DT1 (HOPER)

SUCTCHSE (1.)(Cause: O & Mintervention)

RELCN

RELCHRL

RCHRA

RELRQ


ATINHIAC (7.)

Start T10

Stop T10

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PHCRQ (****)

PHCCN (****)

MTCHBUTI (1.) (start) (*) (****)

CHNAV (sCH1) (**) (****)


CHNAV (sCH2) (**) (****)


CHNAV (mCH) (**) (****)

Start TTRAU(Activation type: relatedto normal assignmentprocedure)

Note: This counter counts as many events as TCHs are used for the HSCSD call.(*)


(**)


(***)

HSCSD call setup continuation (see 1.2.11.1)

BTS BSCMS MSC

Events related to HSCSD TCH request.(****)

130 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.12 Signalling Transactions without TCH

1.2.12.1 Successful Location Update (Phase 2 MS)

BTS BSCMS MSC

CHNREQ

CHNAV (SDCCH)

CHNAK

IACMD (IMASS)

SABM (LUREQ)

UI (IMASS)

UA

MRPCICR (CL3I; LUREQ)




CHNRD

CC

ESTIN (LUREQ)SDCCH

RACH

AGCH

SDCCH


DT1 (LUACC)DATRQ (LUACC)

I (LUACC)

I (TRCMP)DATIN (TRCMP)

DT1 (TRCMP)

SDCCH

SDCCH

DT1 (CL CMD)

DT1 (CL CMP)DATRQ (CHREL)

I (CHREL)SDCCH

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BTS BSCMS MSC

ASDCALTI (stop)

DESACRLSD

RLC

RELIN

RCHRL (SDCCH)

RCHRA

DISC

UASDCCH

SDCCH

132 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.12.2 Successful IMSI Detach (Phase 2 MS)

BTS BSCMS MSC

CHNREQ

CHNAV (SDCCH)

CHNAK

IACMD (IMASS)

SABM (IMDETIN)

UI (IMASS)

ESTIN (IMDETIN)

UA

MRPCICR (CL3I; IMDETIN)




CHNRD

CREFDATRQ (CHREL)I (CHREL)

DESAC

RELIN

RCHRL (SDCCH)

RCHRA

ASDCALTI (stop)

SDCCH

RACH

AGCH

SDCCH

SDCCH

DISC

UASDCCH

SDCCH

A30808-X3247-K41-1-7618 Prelim.07/2001 133

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1.2.12.3 Unsuccessful Immediate Assignment Procedure, No SDCCHAvailable

BTS BSCMS MSC

CHNREQ

IACMD (IMASSRJ)

CHNRD

TACCBPRO (2.)NACSUCPR (2.)

NATTSDPEATSDCMBSNACSUCPR (3.), (1.) (**)ATIMASCA (5.)

UI (IMASSRJ)

RACH

AGCH

Expiry T3122

Start T3122

CHNREQ (*)RACH

T3122 is started in the MS on receipt of an IMMEDIATE ASSIGNMENT REJECT. When it expires, theMS attempts another access to the cell.

(*)

.....

Subcounter (1.) is only increased if the access cause is ’answer to paging’.(**)

134 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.12.4 Unsuccessful Immediate Assignment Procedure, No AGCHAvailable

BTS BSCMS MSC

CHNREQ

CHNAV (SDCCH)

CHNAK

IACMD (IMASS)

DELIN (*)

NATTSDPE,NACSUCPR (3.), (1.) (**)ATIMASCA (*)If last SDCCH startASDCALTI

TACCBPRO (2.)SUIMASCA (*)NACSUCPR (2.)

NACSUCPR (2.) decreased by 1ASDCALTI (stop)

CHNRDRACH

Subcounter depends on the access cause.(*)

Subcounter (1.) is only increased if the access cause is ’answer to paging’.(**)

No AGCHavailable

A30808-X3247-K41-1-7618 Prelim.07/2001 135

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1.2.13 Short Message Service

1.2.13.1 Successful SMS Mobile Originating in Idle Mode (Phase 2 MS)

BTS BSCMS MSC

CHNAV (SDCCH)

CHNAK



TACCBPRO (2.)SUIMASCANACSUCPR (2.)

CHNRD


SABM (CMSREQ)ESTIN (CMSREQ)

MRPCI

I (TRCMD)


ESTIN (SAPI 3)

SDCCH

AGCH

CHNREQRACH

UASDCCH

SDCCH

SABM (SAPI 3)SDCCH

UA (SAPI 3)SDCCH


CC

CR (CL3I; CMSREQ)

I (TRCMP) DATIN (TRCMP)DT1 (TRCMP)SDCCH

136 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

I (CPDAT; RPDA)DATIN (CPDAT; RPDA)

DT1 (CPDAT; RPDA)

I (CPACK)

DT1 (CPACK)DATRQ (CPACK)

I (CPDAT (RPAC)DT1 (CPDAT; RPAC)

DATRQ (CPDAT; RPAC)

I (CHREL)

DT1 (CL CMD)DATRQ (CHREL)

DESAC

RELIN

RELRQ

RELCN

RCHRL (SDCCH)

RCHRA

RLSD

DT1 (CL CMP)

RLC

ASDCALTI (stop)

SDCCH

SDCCH

SDCCH

SDCCH

DISCSDCCH

UASDCCH

A30808-X3247-K41-1-7618 Prelim.07/2001 137

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1.2.13.2 Successful SMS Mobile Terminating in Idle Mode (Phase 2 MS)

BTS BSCMS MSC

CHNAV (SDCCH)

CHNAK

NATTSDPENACSUCPR (1.), (3.)ATIMASCA (6.)If last SDCCH startASDCALTI


PGCMD


SABM (PAGRES)

ESTIN (PAGRES)

MRPCI


TACCBPRO (1.)

UDT (PAGIN)

CHNRD

CC

UI (PAGREQ)PCH

AGCH

SDCCH

UASDCCH

RACHCHNREQ


CR (CL3I; PAGRES)

I (TRCMD)

DT1 (TRCMD)DATIN (TRCMD)

ESTRQ (SAPI 3)

I (TRCMP)DATIN (TRCMP) DT1 (TRCMP)

DT1 (CPDAT; RPDA)SDCCH

SDCCH

SABM (SAPI 3)SDCCH

ESTCN (SAPI 3)

DATRQ (CPDAT; RPDA)I (CPDAT; RPDA)SDCCH

UA (SAPI 3)SDCCH

138 A30808-X3247-K41-1-7618 Prelim.07/2001


I (CPACK)DATIN (CPACK) DT1 (CPACK)

I (CPDAT; RPAC)DATIN (CPDAT; RPAC)

DT1 (CPDAT; RPAC)

I (CPACK)DT1 (CPACK)

DATRQ (CPACK)

I (CHREL)

DT1 (CL CMD)DATRQ (CHREL)

DT1 (CL CMP)DESAC

RELIN

RELRQ

RELCN

RCHRL (SDCCH)

RCHRA

RLSD

RLC

ASDCALTI (stop)

SDCCH

SDCCH

SDCCH

SDCCHDISC

SDCCHUA

SDCCH

BTS BSCMS MSC

A30808-X3247-K41-1-7618 Prelim.07/2001 139

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1.2.13.3 Successful SMS Mobile Originating in Connected Mode

BTS BSCMS MSC

I (CMSREQ)DATIN (CMSREQ)

DT1 (CMSREQ)

DT1 (CMSACC)DATRQ (CMSACC)

I (CMSACC)

I (CPDAT; RPDA)DATIN (CPDAT; RPDA)

DT1 (CPDAT; RPDA)


I (CPACK) DT1 (CPDAT; RPAC)DATRQ (CPDAT; RPAC)

I (CPDAT; RPAC)

UA (SAPI 3)SACCH

FACCH

FACCH

SABM (SAPI 3)SACCH ESTIN (SAPI 3)

SACCH

SACCH

SACCH

Call in progress


140 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.13.4 Successful SMS Mobile Terminating in Connected Mode

BTS BSCMS MSC

DT1 (CPDAT; RPDA)ESTRQ (SAPI 3)

ESTCN (SAPI 3)

DATRQ (CPDAT; RPDA)


DT1 (CPACK)DATIN (CPACK)

DT1 (CPDAT; RPAC)DATIN (CPDAT; RPAC)

I (CPDAT; RPDA)

I (CPACK)

I (CPDAT; RPAC)

UA (SAPI 3)SACCH

SABM (SAPI 3)SACCH

SACCH

SACCH

SACCH

I (CPACK)SACCH

Call in progress


A30808-X3247-K41-1-7618 Prelim.07/2001 141

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1.2.14 Advanced Speech Call Items (ASCI) Procedures

1.2.14.1 VGCS Setup Procedure

BTS BSCMS MSC

ASS CMP

Call setup procedure like for normal calls

Ongoing Group Call

CR (VVS)

The VGCS Setup procedure is started from MSC, when the BSC has assigned a dedicated TCH to thecalling subscriber.

Note:

CC (VVSA)

142 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.14.2 Immediate Setup Procedure

BTS BSCMS MSC

Group Call Emergency Call Setup Request (sent from MS)

Ongoing Emergency Group Call

CR (CL3I;IMSETUP)

IMASS

ESTIN (IMSETUP)

IMASS

SABME (IMSETUP)

UA (IMSETUP)

CC () or CC (ASS REQ)

In case a MS originates an emergency VGCS call,the BSC has to manage the Immedate Setup proce-dure.

Note:

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1.2.14.3 Common VGCS TCH Assignment

BTS BSCMS MSC

VVSA

TASSATVS

I (ASS CMP)

CHNAV

CHNAK

Group Call Setup

Ongoing Group Call

UPLBUSY

CR (VVRQ)

UPLBUSY

NOTCMD

By means of this procedure, performed for every cell involved in the VGCS call, the BSC activates thecommon VGCS TCH, used in this way:

- downlink: by all further listening subscribers- uplink: by the subsequent talking subscribers

by the subscriber/dispatcher which terminates the call

Note:

TASSUCVS

NNNOTNCHNOTCMD

CC (VVAR)

CONNECT

NCH

144 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.14.4 Free Uplink Procedure

BTS 2BSC1 MSCMS BSC

UPRI

DATIN (UPRI)

Current talking subscriber releases its dedicated channel

UPRI

CL CMD

The other MSs may attempt to seize the uplink common VGCS channel, in order totalk

UPRCUPLFREE

UPLFREEDATRQ (CHREL)

CHREL

CLCMPDESAC

DISC (TCH)RLD

RLCRELINUA

RCHRL

RCHRA

This procedure is used by the talking subscriber to release the dedicated channel (TCH). After this pro-cedure othe listening subscribers may attempt to seize the uplink common VGCS channel in order to be-come the subsequent talking subscriber in the group call.

Note:

A30808-X3247-K41-1-7618 Prelim.07/2001 145

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1.2.14.5 Successful Uplink Allocation Procedure

BTS BSCMS MSC

... from Free Uplink procedure

Ongoing Group Call

UPRQ

UPLBUSY

TALKDET

UPLFREE

UPLACC

VGCS UPLGRTUPRA

This procedure is used by a listening subscriber to attempt to seize the uplink common VGCS channel(TCH). When the MS is informed about the successful seizure it then moves to a dedicated channel(TCH) and becomes new talking subscriber. The procedurte is not applied to the calling subscriber duringsetup phase, when the MS moves from SDCCH to the dedicated TCH, as for normal call.

Note:

UPLBUSY

SABM (TALKIND) ESTIN (TALKIND)UPCF

UA (TALKIND)CR (ASS REQ)

PHCRQ

ASS CMD

ASS CMPDATIN (ASS CMP)

DT1 (ASS CMP)

.....

.....

.....

UA

SABM

ESTIN

PHCCN

CHNAV

CHNAK

DATRQ (ASS CMD)

146 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.14.6 Uplink Seized Procedure

BTS 2BSC1 MSCMS BSC

Ongoing Group Call

UPSC

UPRQ

UPLBUSY

UPLBUSY

With this procedure the MSC informs a BSC that a MS belonging to another BSC area has successfullyseized the uplink common VGCS channel (TCH). Then the BSS notify to it's MSs that the channel isbusy.

Note:

Uplink allocation procedure / Ongoing Group Call

UPRA

UPCF

A30808-X3247-K41-1-7618 Prelim.07/2001 147

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1.2.14.7 VGCS Call Originated by a Dispatcher

BTS BSCMS MSC

VVSA

TASSATVS

CHNAV

CHNAK

UPLFREE

UPRC

UPLFREE

NOTCMD

TASSUCVS

NNNOTNCH

NOTCMD

CC (VVAR)

CONNECT

NCH

VVS

After having received the VGCS SETUP ACK, MSC sends to BSC the UPLINK RELEASE CMD to indi-cate that the call has been initiated by a dispatcher. As a consequence, UPLINK FREE is sent on thecommon channel(s) because a listening subscriber can seize the uplink.

Note:

CR (VVRQ)

148 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.14.8 Complete Sequence of ASCI Call Setup and Release

BTS BSCMS MSC

CL3 (CL3I;CMSREQ)

CHNRD

CHNAV

CHNAK

ASS REQ (TCH to call sub.)

CHNREQ

IACMD (IMASS)

CC (VVSA)

AUTRES

CC (CICMD)

CR (VVS)

CHNREQ

IMASS

ESTIN (CMS REQ)

AUTREQ

ENCRY (CIMCMD)CIMCMD

CIMCMP

DATIN (CIMCMP)DT1 (CICMP)

SETUP

CHNAV

CHNAK

ASS CMDASS CMD

SABM ESTIN ASS CMP

A30808-X3247-K41-1-7618 Prelim.07/2001 149

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BTS BSCMS MSC

TASSATVS+1 in each cell incl.in Group Call Area

CHNAV

CHNAK

UPLINKBUSY

CC (VVRQ)

UPLINKBUSYNOTCMD

NNNOTNCHNOTCMD

CC (VVAR)

CONNECT

NCH

CR (VVRQ)

Ongoing Group Call

SET SYSINFO 10

TASSATVS+1 in each cell incl.in Group Call Area

CC (VVAR)

150 A30808-X3247-K41-1-7618 Prelim.07/2001


BTS BSCMS MSC

DATRQ (CHREL)

RELIN

DESAC

RLSD

CHREL

RCHRL

CHREL

CL CMP

End of Group Call

CHREL (UI)

CL CMP

Termination request from an ongoing Group Call

DISC (TCH calling)

CL CMD

RLSD

UA RLC

RCHRA

CL CMD

DESAC

RCHRL

RCHRA

CL CMD

CL CMD

RLC

All Res. Contr. SCCP

conn. and associated

VGCS TCHs released

A30808-X3247-K41-1-7618 Prelim.07/2001 151

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1.2.15 Other Procedures

1.2.15.1 Idle Traffic Channel Supervision

BTS BSCMS MSC

RESIN (*)

MEITCHIB

RESIN (*)

Contains the idle TCH measurements for all TCHs of the TRX currently not used for a call.(*)

ILUPLKIC

MEITCHIBILUPLKIC

.....

.....

152 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.15.2 Uplink and Downlink Measurement Reports at Abis

BTS BSCMS MSC

MEAS REP

PWRUPDW

MESRS (MEAS REP) (*)

PWRUPDW

MEAS REPMESRS (MEAS REP) (*)

Measurement Reports are transmitted for each TCH of the TRX currently seized by a call.(*)

.....

..........

.....

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1.2.15.3 IMSI Trace Invocation for Normal Call Setup

BTS BSCMS MSC

ESTIN (CMSREQ)

MRPCI

I (CLAMCH)

DT1 (CICMD)

ENCRY (CIMCMD)

DATIN (CLAMCH)DT1 (CLUPD)

I (CIMCMP)DATIN (CIMCMP)

DT1 (CICMP)

I (TRCMD)


I (CMSREQ)SDCCH

SDCCH

I (CIMCMD)

SDCCH

SDCCH

SDCCH

CR (CL3I; CMSREQ)

Call setup ...

CC (MSIT)

STRAC

STRACACK

Call setup continuation and completion...

TMEASRES (MEASREP)


TMEASRES (MEASREP)

TMEASRES (MEASREP)

154 A30808-X3247-K41-1-7618 Prelim.07/2001


1.2.15.4 IMSI Trace Invocation for Incoming Inter-BSC Handover

BTSold BTSnewMS

CHNAK

I (HO CMD)

BSCnewBSCold MSC

CR (HO REQ)

DATRQ (HO CMD)

CC (HO RAC; HO CMD)


FACCH

CHNAV (New TCH)

Continuation of handover procedure ...

DT1 (MSIT)

I (HO CMP)

DATIN (HO CMP)

MRPCIDT1 (HO CMP)

RELRQ

DT1 (CL CMD)

DT1 (CL CMP)RELCN

RCHRA

RLSD


FACCH

RLC

RCHRL (Old TCH)


STRAC

STRACACK

TMEASRES (MEASREP)

TMEASRES (MEASREP)

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InformationSystem


2 Counter / Message Abbreviations

Abbreviation Long Name Type

-A-

AGCH ACCESS GRANT CHANNEL Um ChannelALERT ALERTING DTAP MessageASS CMD ASSIGNMENT COMMAND DTAP MessageASS CMP ASSIGNMENT COMPLETE DTAP MessageASS CMP ASSIGNMENT COMPLETE BSSMAP MessageASS FAIL ASSIGNMENT FAILURE DTAP MessageASS FAI ASSIGNMENT FAILURE BSSMAP MessageASS REQ ASSIGNMENT REQUEST BSSMAP MessageAUTREP AUTHENTICATION RESPONCE DTAP MessageAUTREQ AUTHENTICATION REQUEST DTAP Message

--B-

BCCH BROADCAST CONROL CHANNEL Um ChannelBCINF BCCH INFORMATION Um MessageBWHCI INTERCELL HANDOVER CONDITION INDICA-

TIONAbis RSL Message

BSSMAP BASE STATION MANAGEMENT APPLICATIONPART

A-Protocol

-C-

CC CONNECTION CONFIRM SCCP MessageCCONF CALL CONFIRMED DTAP MessageCHMM CHANNEL MODE MODIFY DTAP MessageCHMMACK CHANNEL MODE MODIFY ACKNOWLEDGE DTAP MessageCHNAK CHANNEL ACTIVATION ACKNOWLEDGE Abis RSL MessageCHNAV CHANNEL ACTIVATION Abis RSL MessageCHNRD CHANNEL REQUIRED Abis RSL MessageCHNREQ CHANNEL REQUEST Um MessageCHREL CHANNEL RELEASE DTAP MessageCICMD CIPHER MODE COMMAND BSSMAP MessageCICMP CIPHER MODE COMPLETE BSSMAP MessageCIMCMD CIPHERING MODE COMMAND DTAP MessageCIMCMP CIPHERING MODE COMPLETE DTAP MessageCLAMCH CLASSMARK CHANGE DTAP MessageCL CMD CLEAR COMMAND BSSMAP MessageCL CMP CLEAR COMPLETE BSSMAP MessageCLUPD CLASSMARK UPDATE BSSMAP MessageCL REQ CLEAR REQUEST BSSMAP MessageCL3I COMPLETE LAYER 3 INFORMATION BSSMAP MessageCMSACC CM SERVICE ACCEPT DTAP Message

156 A30808-X3247-K41-1-7618 Prelim.07/2001


CMSREQ CM SERVICE REQUEST DTAP MessageCONACK CONNECT ACKNOWLEDGE DTAP MessageCONNECT CONNECT DTAP MessageCPACK SHORT MESSAGE CP-ACK DTAP MessageCPDAT SHORT MESSAGE CP-DATA DTAP MessageCPROC CALL PROCEEDING DTAP MessageCR CONNECTION REQUEST SCCP MessageCREF CONNECTION REFUSED SCCP Message

-D-

DATIN DATA INDICATION Abis RSL MessageDATRQ DATA REQUEST Abis RSL MessageDELIN DELETE INDICATION Abis RSL MessageDESAC DEACTIVATE SACCH Abis RSL MessageDISC DISCONNECT DTAP MessageDTAP DIRECT TRANSFER APPLICATION PART Protocol

(MS<->BSC,MS<->MSC)

DT1 DATA FORM 1 SCCP Message

-E-

EMSETUP EMERGENCY SETUP DTAP MessageENCRY ENCRYPTION COMMAND Abis RSL MessageESTCN ESTABLISH CONFIRM Abis RSL MessageESTIN ESTABLISH INDICATION Abis RSL MessageESTRQ ESTABLISH REQUEST Abis RSL Message

-F-

FACCH FAST ASSOCIATED CONTROL CHANNEL Um ChannelFACIL FACILITY DTAP MessageFHREQ FORCED HO REQUEST Abis RSL MessageFR FULL RATE Speech Version

-G-

-H-

HANDO HANDOVER DETECTION Abis RSL MessageHO CMD HANDOVER COMMAND DTAP MessageHO CMP HANDOVER COMPLETE DTAP Message


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InformationSystem


HO DET HANDOVER DETECT BSSMAP MessageHO FAIL HANDOVER FAILURE DTAP MessageHO FAI HANDOVER FAILURE BSSMAP MessageHO PER HANDOVER PERFORMED BSSMAP MessageHO RAC HANDOVER REQUEST ACKNOWLEDGE BSSMAP MessageHO REQ HANDOVER REQUEST BSSMAP MessageHO RQD HANDOVER REQUIRED BSSMAP MessageHO RRJ HANDOVER REQUIRED REJECT BSSMAP MessageHR HALF RATE Speech Version

-I-

I INFORMATION Um layer2 MessageIACMD IMMEDIATE ASSIGN COMMAND Abis RSL MessageIMASS IMMEDIATE ASSIGNMENT DTAP MessageIMASSRJ IMMEDIATE ASSIGNMENT REJECT DTAP MessageIMDETIN IMSI DETACH INDICATION DTAP MessageIMSETUP IMMEDIATE SETUP MESSAGE BSSM

-J-

-K-

-L-

LUACC LOCATION UPDATING ACCEPT DTAP MessageLUREQ LOCATION UPDATING REQUEST DTAP Message

-M-

MEAS REP MEASUREMENT REPORT Um MessageMESRS MEASUREMENT RESULT Abis RSL MessageMOMAK MODE MODIFY ACKNOWLEDGE Abis RSL MessageMOMRQ MODE MODIFY REQUEST Abis RSL MessageMRPCI MS RF POWER CAPABILITY INDICATION Abis RSL MessageMSIT MSC INVOKE TRACE BSSMAP Message

-N-

NCH NOTIFICATION CHANNEL UM ChannelNOTCMD NOTIFICATION COMMAND SRSL


158 A30808-X3247-K41-1-7618 Prelim.07/2001


-O-

-P-

PAGIN PAGING BSSMAP MessagePAGREQ PAGING REQUEST Um MessagePAGRES PAGING RESPONSE DTAP MessagePAREA PREFERRED AREA Abis RSL MessagePAREQ PREFERRED AREA REQUEST Abis RSL MessagePCH PAGING CHANNEL Um ChannelPGCMD PAGING COMMAND Abis RSL MessagePHCCN PHYSICAL CONTEXT CONFIRM Abis RSL MessagePHCRQ PHYSICAL CONTEXT REQUEST Abis RSL MessagePROGRES PROGRESS DTAP Message

-Q-QUIND QUEUING INDICATION BSSMAP Message

-R-

RACH RANDOM ACCESS CHANNEL Um channelRCHRA RF CHANNEL RELEASE ACKNOWLEDGE Abis RSL MessageRCHRL RF CHANNEL RELEASE Abis RSL MessageRELCMP RELEASE COMPLETE DTAP MessageRELCN RELEASE CONFIRM Abis RSL MessageRELEAS RELEASE DTAP MessageRELIN RELEASED INDICATION Abis RSL MessageRELRQ RELEASE REQUEST Abis RSL MessageRESIN RF RESOURCE INDICATION Abis RSL MessageRETRACK RETRIEVE ACKNOWLEDGE DTAP MessageRETRV RETRIEVE DTAP MessageRLC RELEASE COMPLETE SCCP MessageRLSD RELEASED SCCP MessageRPAC RP-ACK SMRP MessageRPDA RP-DATA SMRP MessageRSL RADIO SIGNALLING LINK Abis-Protocol

-S-

SABM SET ASYNCHRONOUS BALANCED MODE Um layer2 MessageSACFL SACCH FILLING Abis RSL MessageSACCH SLOW ASSOCIATED CONTROL CHANNEL Um ChannelSBCCM SMS BROADCAST COMMAND Abis RSL Message


A30808-X3247-K41-1-7618 Prelim.07/2001 159

InformationSystem


SCCP SIGNALLING CONNECTION CONTROL PART CCS7 User PartSDCCH STAND ALONE DEDICTED CONTROL CHAN-

NELUm Channel

SETUP SETUP DTAP MessageSPDACK STOP DTMF ACKNOWLEDGE DTAP MessageSPDTMF STOP DTMF DTAP MessageSTDACK START DTMF ACKNOWLEDGE DTAP MessageSTDTMF START DTMF DTAP MessageSTRAC START TRACE Abis RSL MessageSTRACACK START TRACE ACKNOWLEDGE Abis RSL Message

-T-

TALKDET TALKER DETECT MESSAGE DTAPTALKIND TALKER INDICATION MESSAGE DTAPTCH TRAFFIC CHANNEL Um ChannelTMEASRES TRACE MEASUREMENT RESULTS Abis RSL MessageTRCMD TMSI REALLOCATION COMMAND DTAP MessageTRCMP TMSI REALLOCATION COMPLETE DTAP Message

-U-

UA UNNUMBERED ACKNOWLEDGEMENT Um layer2 MessageUDT UNIT DATA SCCP MessageUI UNNUMBERED INFORMATION Um layer2 MessageUPCF UPLINK REQUEST CONFIRM MESSAGE BSSMUPLACC UPLINK ACCESS DTAPUPLGRT UPLINK GRANT MESSAGE DTAPUPLINKBUSY UPLINK BUSY MESSAGE DTAPUPLINKFREE UPLINK FREE MESSAGE DTAPUPLREL UPLINK RELEASE DTAPUPRA UPLINK REQUEST ACKNOWLEDGE BSSMUPRC UPLINK RELEASE COMMAND BSSMUPRI UPLINK RELEASE INDICATION BSSMUPRQ UPLINK REQUEST MESSAGE BSSMUPSC UPLINK SEIZED COMMAND BSSM

-V-

VVAR VGCS ASSIGNMENT RESULT BSSMVVRQ VGCS ASSIGNMENT REQUEST MESSAGE BSSMVVS VGCS SETUP MESSAGE BSSMVVSA VGCS SETUP ACKNOWLEDGE BSSM


160 A30808-X3247-K41-1-7618 Prelim.07/2001


-W-

WIHCI INTRACELL HANDOVER CONDITION INDICA-TION

Abis RSL Message


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3 AbbreviationsASCI Advanced Speech Call Items

BSC Base Station Controller

BSIC Base Station Identity Code

BTS Base Transceiver Station

MS Mobile Station

MSC Mobile-Services Switching Center

SBS Siemens Base Station System

TMSI Temporary Mobile Subscriber Identity

VGCS Voice Group Call Service

162 A30808-X3247-K41-1-7618 Prelim.07/2001


57348591 pm message flows br60

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