Content for TS 23.121 Word version: 3.6.0
4 Working assumptions
4.1 General
4.2 Iu Interface
4.3 UMTS Mobility Management (UMM)
4.4 UMTS call control
4.5 Core network layer 3
4.6 Structure of radio interface layer 3
4.7 Alternate Access technologies to UTRAN
4.8 Location of the IP compression function in UMTS
4.9 Short Message Service for UMTS
4.10a Cell Broadcast Service in UMTS
4.10 Mobile IP for UMTS/GPRS End Users
4.11 Allowed network and terminal configurations
5 UMTS to UMTS handover for circuit switched services
6 Interoperability between GSM and UMTS
6.1 Circuit Switched Handover and Roaming Principles
6.2 Packet Switched Handover and Roaming Principles
A Reduction of UMTS signalling
$ Change history
4 Working assumptions p. 7
4.1 General p. 7
4.2 Iu Interface p. 7
4.2.1 Iu Control Plane p. 8
4.2.2 Iu User plane p. 9
4.2.2.1 Principles of User Data Retrieve in UMTS and at GSM-UMTS Hand-Over for PS Domain p. 10
4.2.2.1.1 Requirements for Data retrieve at GPRS/UMTS handover p. 10
4.2.2.1.2 Adopted solution for data retrieve at GPRS-UMTS handover p. 10
4.2.2.1.3 Requirements for data retrieve in UMTS p. 11
4.2.2.1.4 Adopted solution for data retrieve in UMTS p. 12
4.2.2.1.5 User plane protocol stacks for UMTS data retrieve p. 12
4.2.2.1.6 User plane protocol stacks for data retrieve between UTRAN and 2G-SGSN p. 13
4.2.2.2 Packet buffering in SRNC and transmission of not yet acknowledged downstream packets at SRNC relocation p. 13
4.2.2.3 Load sharing p. 14
4.3 UMTS Mobility Management (UMM) p. 14
4.3.1 Location Management and Mobility Management concept overview p. 14
4.3.2 Description of the Location Management and Mobility Management Concept p. 17
4.3.2.1 Area concepts p. 17
4.3.3 Relationship between MM and SM states for an UE p. 19
4.3.4 Requirement in case of temporarily loss of coverage of packet UE p. 20
4.3.5 MM functionality in different UE service states p. 20
4.3.6 The RRC state machine p. 21
4.3.7 Relationship between CS and PS service states and RRC state for an UE p. 22
4.3.8 Service registration and location update p. 23
4.3.9 Paging initiated by CN p. 23
4.3.10 Signalling connection establishment p. 24
4.3.10a CS Domain Signalling Requirements (in particular relating to handover) p. 24
4.3.11 Relations between SRNS relocation and Location registration p. 24
4.3.12 Requirements on Identifiers for UMTS and GSM p. 26
4.3.13 Use of TMSI signature p. 26
4.3.13.1 IMSI attach p. 26
4.3.13.2 Location Area update p. 26
4.3.13.3 MM System Information p. 26
4.3.13.4 IMSI detach procedure p. 27
4.3.14 Signalling procedures p. 27
4.3.14.1 Idle mode procedures p. 27
4.3.14.1.1 Location Area update p. 27
4.3.14.1.2 Routing Area update p. 29
4.3.14.1.3 Periodic Registration towards both CN nodes without use of Gs p. 30
4.3.14.1.4 Periodic Registration with use of Gs/UMSC p. 31
4.3.14.1.5 UE initiated Combined Detach Procedure when using Gs/UMSC p. 32
4.3.14.2 SRNS Relocation p. 32
4.3.14.2.1 SRNS relocation principles p. 32
4.3.14.2.2 SRNS relocation (UE connected to a single CN node, 3G_MSC/VLR) followed by Location Registration in new Routing Area p. 33
4.3.14.2.3 SRNS relocation (UE connected to a single CN node, 3G_SGSN) followed by Location Registration in new Location Area p. 35
4.3.14.3 Comparison between UMTS and GSM p. 35
4.3.14.4 Issues for further study p. 36
4.3.15 - p. 36
4.3.16 UTRAN coordination p. 36
4.4 UMTS call control p. 37
4.4.1 Technical Requirements p. 37
4.4.2 Architecture for Multimedia p. 37
4.4.3 Typical Scenarios for Multimedia Control and User Plane p. 41
4.5 Core network layer 3 p. 43
4.6 Structure of radio interface layer 3 p. 44
4.7 Alternate Access technologies to UTRAN p. 44
4.7.1 Advantages of attaching HIPERLAN 2 to UMTS p. 45
4.7.2 HIPERLAN 2 UMTS Interworking p. 45
4.7.3 Related Actions p. 45
4.8 Location of the IP compression function in UMTS p. 45
4.8.1 Functional role of SNDCP / PDCP p. 45
4.8.2 Position for header compression p. 46
4.8.3 Implied protocol stack p. 46
4.9 Short Message Service for UMTS p. 46
4.10a Cell Broadcast Service in UMTS p. 47
4.10 Mobile IP for UMTS/GPRS End Users p. 49
4.11 Allowed network and terminal configurations p. 51
5 UMTS to UMTS handover for circuit switched services p. 52
6 Interoperability between GSM and UMTS p. 52
6.1 Circuit Switched Handover and Roaming Principles p. 52
6.1.1 UMTS to GSM handover for circuit switched services p. 54
6.1.2 GSM to UMTS handover for circuit switched services p. 54
6.2 Packet Switched Handover and Roaming Principles p. 54
A Reduction of UMTS signalling p. 56
A.1 GLR Concept p. 56
$ Change history p. 57
