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Content for TS 29.415 Word version: 18.0.0

0… 4…

4.1 General aspects 4.2 Operational and Functional Aspects 6.1 General 6.2 Nb UP protocol layer services in Support Mode 6.3 Services expected from the Transport Network Layer 6.4 Functions of the Nb UP protocol layer in Support Mode 6.5 Elementary procedures 6.6 Elements for Nb UP communication in Support mode 6.7 Handling of unknown, unforeseen and erroneous protocol data 7.1 Modelling Principle 7.2 Primitives towards the upper layers at the CNL-SAP 7.3 Primitives towards the transport layers at TNL-SAP

4 User Plane p. 7

4.1 General aspects p. 7

4.2 Operational and Functional Aspects p. 8

5 Transparent Mode p. 8

6 Support mode for predefined SDU sizes p. 8

6.1 General p. 8

6.2 Nb UP protocol layer services in Support Mode p. 8

6.3 Services expected from the Transport Network Layer p. 8

6.4 Functions of the Nb UP protocol layer in Support Mode p. 9

6.4.1 Functional model of the Nb UP protocol layer in Support Mode p. 9

6.4.2 Frame handler function p. 9

6.4.3 Procedure control functions p. 9

6.4.4 Non Access Stratum data streams specific functions p. 9

6.4.4.1 Frame quality classification p. 9

6.4.4.1.1 General p. 9

6.4.4.1.2 Handling of FQC information p. 10

6.5 Elementary procedures p. 10

6.5.1 Transfer of User Data procedure p. 10

6.5.1.1 Successful operation p. 10

6.5.1.2 Unsuccessful operation p. 10

6.5.2 Initialisation procedure p. 10

6.5.2.1 Successful operation p. 10

6.5.2.2 Unsuccessful operation p. 11

6.5.3 Rate Control p. 11

6.5.3.1 Successful operation p. 11

6.5.3.1.1 Rate control for codecs other than the EVS codec |R13| p. 11

6.5.3.1.2 Rate and mode control for the EVS codec |R13| p. 11

6.5.3.1.3 Interworking of rate control between compatible AMR-WB and EVS codec configurations |R13| p. 12

6.5.3.2 Unsuccessful operation p. 12

6.5.4 Time Alignment p. 13

6.5.4.1 Successful operation p. 13

6.5.4.2 Unsuccessful operation p. 13

6.5.5 Handling of Error Event procedure p. 13

6.5.5.1 Successful operation p. 13

6.5.5.2 Unsuccessful operation p. 13

6.6 Elements for Nb UP communication in Support mode p. 13

6.7 Handling of unknown, unforeseen and erroneous protocol data p. 13

7 Communication Primitives for the Nb UP protocol layer p. 13

7.1 Modelling Principle p. 13

7.2 Primitives towards the upper layers at the CNL-SAP p. 13

7.3 Primitives towards the transport layers at TNL-SAP p. 13

7.3.1 General p. 13

7.3.2 ATM/AAL2 based Transport Layer p. 14

7.3.2.1 General p. 14

7.3.2.2 AAL2 Service Primitives used by the Nb UP protocol p. 14

7.3.3 GTP-U based Transport Layer p. 14

7.3.4 RTP/UDP/IP based Transport Layer p. 14

8 Evolution of Nb UP Protocol p. 14

$ Change History p. 15