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TS 23.284 (CT4)
Local Call Local Switch (LCLS) –
Stage 2

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V15.0.0 (PDF)  2018/06  189 p.
V14.0.0  2017/03  194 p.
V13.0.0  2015/12  193 p.
V12.0.0  2013/12  192 p.
V11.1.0  2012/12  192 p.
V10.5.0  2012/12  192 p.

Rapporteur:  Mrs. Biondic, Nevenka

LCLS (Local Call Local Switch) provides the capability for the user plane to be locally switched (e.g. voice data in user plane is not backhauled to the CS core network) for calls that are generated and terminated by users that are served by the same BSS. The result is saving on transmission resource of the Abis and/or A interface.
LCLS shall only be considered for a CS voice call and is transparent to the end user. LCLS may be supported on both TDM based A interface (AoTDM) and IP based A interface (AoIP). LCLS may be implemented on both a BICC based CS core network and a SIP-I based CS core network.

short Table of Contents for  TS 23.284  Word version:   15.0.0

each title links to the equivalent title in the full ToC

 

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1  ScopeWord-p. 12
2  ReferencesWord-p. 12
3  Definitions, symbols and abbreviationsWord-p. 13
4  Main ConceptsWord-p. 13
4.1  GeneralWord-p. 13
4.2  LCLS NegotiationWord-p. 14
4.3  LCLS Call Leg CorrelationWord-p. 19
4.4  LCLS Connection ControlWord-p. 21
4.5  LCLS Status ReportingWord-p. 22
4.6  User Plane when LCLS is ActiveWord-p. 23
5  General Circuit Switched Core Network Domain ArchitectureWord-p. 23
6  Call EstablishmentWord-p. 24
6.1  Basic Mobile Originating CallUpWord-p. 24
6.1.1  Basic Mobile Originating Call with BICC based CS core networkWord-p. 24
6.1.2  Basic Mobile Originating Call with SIP-I based CS core networkWord-p. 26
6.2  Basic Mobile Terminating CallUpWord-p. 26
6.2.1  Basic Mobile Terminating Call with BICC based CS core networkWord-p. 26
6.2.2  Basic Mobile Terminating Call with SIP-I based CS core networkWord-p. 29
6.3  Basic Mobile to Mobile End to End Call ExamplesWord-p. 30
7  Call Clearing and LCLS Break/Re-establishmentWord-p. 47
7.1  Call ClearingWord-p. 47
7.2  LCLS BreakWord-p. 47
7.2.1  MSC server InitiatedUpWord-p. 47
7.2.2  BSS InitiatedWord-p. 49
7.2.3  Intermediate Node/GMSC Server InitiatedWord-p. 50
7.2.4  LCLS Break Example Call FlowsUpWord-p. 51
7.3  LCLS Re-establishmentWord-p. 59
7.3.1  MSC server InitiatedWord-p. 59
7.3.2  BSS InitiatedWord-p. 60
7.3.3  Intermediate Node / GMSC Server InitiatedWord-p. 60
7.3.4  LCLS Re-establishment Example Call FlowsWord-p. 61
8  Handover/RelocationWord-p. 65
8.1  UMTS to UMTSWord-p. 65
8.2  UMTS to GSMWord-p. 66
8.2.1  GeneralUpWord-p. 66
8.2.2  Intra-MSC UMTS to GSM HandoverWord-p. 66
8.2.3  Inter-MSC UMTS to GSM HandoverWord-p. 70
8.3  GSM to UMTSWord-p. 77
8.3.1  Intra-MSC GSM to UMTS RelocationWord-p. 77
8.3.2  Inter-MSC GSM to UMTS RelocationWord-p. 84
8.4  GSM to GSMWord-p. 92
8.4.1  Intra-MSC Inter-BSS GSM to GSM HandoverWord-p. 92
8.4.2  Inter-MSC GSM to GSM HandoverWord-p. 103
8.4.3  Subsequent Inter-MSC GSM to GSM Handover back to the Anchor MSCWord-p. 119
8.4.4  Subsequent GSM to GSM Handover to a third MSCWord-p. 119
8.4.5  BSS Internal HandoverWord-p. 119
8.5  Handling of GSM Services after UMTS to GSM HandoverWord-p. 131
9  Compatibility IssuesWord-p. 132
10  General (G)MSC server-MGW ProceduresWord-p. 132
11  IdentitiesWord-p. 132
12  Operational AspectsWord-p. 132
13  Interactions with Other ServicesWord-p. 132
14  Interactions with Other Network Features and ServicesWord-p. 162
15  TunnellingWord-p. 173
16  Messages/Procedures and their contentsUpWord-p. 173
17  Bearer RedirectWord-p. 181
18  (G)MSC MGW TandemingWord-p. 181
19  TimersWord-p. 181
20  Multiple RealmsWord-p. 181
A  Case studies for LCLS NegotiationWord-p. 182
B  Change historyWord-p. 190

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