Content for TR 23.924 Word version: 18.0.0
4 General Description
5 Functional Description
6 Interaction with other features
7 Compatibility Issues
8 Evaluation
9 Conclusions
$ Change history
4 General Description p. 7
4.1 Architecture Assumptions p. 7
4.2 Overview p. 7
4.2.1 Issues with deploying NNSF in BSC nodes for MSC pool p. 7
4.2.1.1 In certain networks some existing BSC/RNC nodes do not support the feature p. 7
4.2.1.2 Mesh TDM circuit connection between BSCs with MSCs is required p. 8
4.2.1.3 Complex O&M p. 10
4.2.2 Implementing SNSF outside of the BSC/RNC nodes p. 10
4.2.3 Issues with deploying NNSF in BSC nodes for SGSN pool p. 11
4.3 Load Balancing p. 11
4.4 Load Re-Distribution p. 11
4.5 Mobility Management p. 11
4.6 Default CN node p. 11
4.7 Support of combined mobility management procedures p. 11
4.8 Re-use of A-Interface TDM circuits p. 12
4.9 Redundancy and failover p. 12
5 Functional Description p. 12
5.1 MS function p. 12
5.2 RNC Functions p. 13
5.3 BSC Functions p. 13
5.4 MSC Server Functions p. 13
5.4a MGW Functions p. 13
5.5 SGSN Functions p. 13
5.6 SNSF Functions p. 13
5.6.1 General p. 13
5.6.2 Handling of connection-oriented messages p. 14
5.6.2.1 Basic Handling of connection-oriented messages p. 14
5.6.2.2 SCCP Local Reference Based Handling of connection-oriented messages p. 15
5.6.3 Handling of connectionless messages p. 16
5.6.3.1 UTRAN p. 17
5.6.3.1.1 Reset p. 17
5.6.3.1.2 Overload Control p. 19
5.6.3.1.3 Reset Resource p. 21
5.6.3.1.4 ERROR INDICATION p. 23
5.6.3.1.5 INFORMATION TRANSFER p. 24
5.6.3.1.6 Direct Information Transfer p. 24
5.6.3.1.7 Uplink Information Exchange p. 25
5.6.3.1.8 Paging p. 26
5.6.3.2 GSM p. 27
5.6.3.2.1 Reset p. 27
5.6.3.2.2 Overload p. 29
5.6.3.2.3 Reset IP Resource p. 29
5.6.3.2.4 Paging p. 29
5.6.3.2.5 Resource Request p. 29
5.6.3.2.6 Handover Candidate Enquire p. 30
5.6.3.2.7 Confusion p. 30
5.6.3.2.8 Load Indication p. 31
5.6.3.2.9 Connectionless Information Transfer p. 32
5.6.3.2.10 TDM Circuit Management p. 32
6 Interaction with other features p. 35
6.1 Interaction with Network Sharing p. 35
6.1.1 Interaction with MOCN p. 36
6.1.1.1 General p. 36
6.1.1.2 RAN selects and distributes messages to CN nodes directly p. 36
6.1.1.3 SNSF node select and distribute messages to CN nodes p. 36
6.1.2 Interaction with GWCN p. 37
6.1.3 Conclusion p. 37
6.2 Interaction with A interface over IP p. 37
7 Compatibility Issues p. 38
8 Evaluation p. 38
9 Conclusions p. 39
$ Change history p. 40
