Content for TR 24.890 Word version: 16.0.0
4 Architecture
4.1 General
4.2 Architecture reference model
4.3 Architecture for interworking with E-UTRAN connected to EPC
5 Network selection procedures
5.1 Concepts
5.2 Procedures
6 Stage 3 protocol, general aspects
6.1 General
6.2 Protocols and peer to peer communication
6.3 Basic groups of functions
6.4 Protocol architecture
6.5 Standard L3 messages
6.6 General message format and information elements coding
6.7 Handling of unknown, unforeseen, and erroneous protocol data
7 Coordination between the protocols for 5GS mobility management and 5GS session management
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4 Architecture p. 25
4.1 General p. 25
4.2 Architecture reference model p. 25
4.3 Architecture for interworking with E-UTRAN connected to EPC p. 26
5 Network selection procedures p. 27
5.1 Concepts p. 27
5.2 Procedures p. 28
5.2.1 General p. 28
5.2.2 Procedures for 3GPP radio access networks p. 28
5.2.2.1 General p. 28
5.2.2.2 PLMN selection in 5GMM-CONNECTED mode with RRC inactive indication p. 29
5.2.3 Procedures for non-3GPP access networks p. 29
5.2.4 Procedure for steering of UE in VPLMN p. 29
5.2.4.1 Alternative 1 for steering of UE in VPLMN p. 29
5.2.4.1.1 General p. 29
5.2.4.1.2 Procedure for steering of UE in VPLMN during registration p. 29
5.2.4.1.2.1 Initiation of the procedure for steering of UE in VPLMN during registration p. 29
5.2.4.1.2.2 Procedure for steering of UE in VPLMN during registration accepted by the UE p. 30
5.2.4.1.2.3 Procedure for steering of UE in VPLMN not accepted by the UE during registration p. 30
5.2.4.1.3 Procedure for steering of UE in VPLMN after registration p. 30
5.2.4.1.3.1 Initiation of the procedure for steering of UE in VPLMN after registration p. 30
5.2.4.1.3.2 Procedure for steering of UE in VPLMN after registration accepted by the UE p. 30
5.2.4.1.3.3 Procedure for steering of UE in VPLMN after registration not accepted by the UE p. 31
5.2.4.1.4 Completion of the procedure for steering of UE in VPLMN at the network p. 31
5.2.4.1.5 Stage-2 flow p. 31
5.2.4.1.5.1 Stage-2 flow for steering of UE in VPLMN during registration. p. 31
5.2.4.1.5.2 Stage-2 flow for steering of UE in VPLMN after registration p. 33
5.2.4.1.6 Stage-3 encoding of the list of preferred PLMN/access technology combinations p. 34
5.2.4.2 Alternative 2 for steering of UE in VPLMN p. 34
5.2.4.2.1 General p. 34
5.2.4.2.2 Initiation of the procedure for steering of UE in VPLMN p. 35
5.2.4.2.3 Procedure for steering of UE in VPLMN accepted by the UE p. 35
5.2.4.2.4 Procedure for steering of UE in VPLMN not accepted by the UE p. 35
5.2.4.2.5 Stage-2 flow p. 35
5.2.4.3 Void
6 Stage 3 protocol, general aspects p. 37
6.1 General p. 37
6.2 Protocols and peer to peer communication p. 37
6.3 Basic groups of functions p. 38
6.4 Protocol architecture p. 38
6.5 Standard L3 messages p. 41
6.6 General message format and information elements coding p. 41
6.6.1 Overview p. 41
6.6.2 Extended protocol discriminator p. 42
6.6.3 Security header type p. 42
6.6.4 PDU session identity p. 42
6.6.5 Spare half octet p. 42
6.6.6 Procedure transaction identity p. 42
6.6.7 Message type p. 42
6.7 Handling of unknown, unforeseen, and erroneous protocol data p. 42
6.7.1 General p. 42
6.7.2 Message too short p. 43
6.7.3 Unknown or unforeseen procedure transaction identity or PDU Session identity p. 43
6.7.4 Unknown or unforeseen message type p. 43
6.7.5 Non-semantical mandatory information element errors p. 43
6.7.5.1 Common procedures p. 43
6.7.5.2 5GS mobility management p. 44
6.7.5.3 5GS session management p. 44
6.7.6 Unknown and unforeseen IEs in the non-imperative message part p. 44
6.7.6.1 IEIs unknown in the message p. 44
6.7.6.2 Out of sequence IEs p. 44
6.7.6.3 Repeated IEs p. 44
6.7.7 Non-imperative message part errors p. 45
6.7.8 Messages with semantically incorrect contents p. 45
7 Coordination between the protocols for 5GS mobility management and 5GS session management p. 45
