Section: 6.2 Message Granularity
Content: The GTPv2-C messages shall be sent per UE on the S3, S10, S16 and N26 interfaces. The GTPv2-C messages shall be sent per PDN-Connection on the S2a, S2b, S4, S11, S5 and S8 interfaces apart from the following exclusion. The following GTPv2-C messages are sent per UE on the S4 and S11 interfaces: - Downlink Data Notification / Acknowledge / Failure Indication; - Stop Paging Indication; - Delete Indirect Data Forwarding Tunnel Request/Response; - Delete Session Request/Response with Scope Indication set to 1 during following procedures with SGW change: - Tracking Area Update procedure; - Routing Area Update procedure; - Handover procedure; - SRNS Relocation Cancel Using S4; - Inter RAT handover Cancel procedure; - S1 based handover cancel procedure; - Delete Bearer Request/Response during a TAU/RAU/Handover procedure if the Cause value "ISR deactivation" is included in the Delete Session Request message, or when it is sent to delete the bearer resources on the other ISR associated CN node if the ISRAI flag is not set in the Modify Bearer Request/Modify Access Bearers Request message. - Release Access Bearers Request/Response; - Create Indirect Data Forwarding Tunnel Request/Response; - Trace Session Activation; - Trace Session Deactivation; - Create Forwarding Tunnel Request/Response. The following GTPv2-C messages are sent per UE on the S11 interface: - Modify Access Bearers Request/Response. The following GTPv2-C messages are sent per GTP-C entity on the S2a, S2b, S5, S8, and S11 interfaces: - Delete PDN Connection Set Request/Response. The following GTPv2-C messages are sent per GTP-C entity on the S5 and S8 interfaces: - Update PDN Connection Set Request/Response. The following GTPv2-C messages are sent per GTP-C entity on the S4 and S11 interfaces: - PGW Restart Notification/Acknowledge. The following GTPv2-C path management messages are sent per GTP-C entity on all GTPv2-C interfaces: - Echo Request/Response; - Version Not Supported Indication.