File Service Announcement File

In Release 15, the SA function was enhanced with new procedures for the establishment, modification, and deletion of IKE and IPsec Security Associations. This included specific handling for scenarios where SA establishment is not accepted by the network, local deletion procedures, and deletion due to rekeying failure. Corrections and editorial updates were also made to ensure clarity in the description of default user plane SA indication and child SA establishment.

• User plane IPsec SA establishment not accepted TS 24.502CR0023
• IKE SA deletion procedure handling TS 24.502CR0027
• Signalling IPsec SA establishment not accepted by the network TS 24.502CR0022
• Correction for default user plane SA indication TS 24.502CR0030
• Local deletion of IKE SA and child SAs TS 24.502CR0036
• IKE SA and child SAs deletion by UE due to rekeying failure TS 24.502CR0037

+ 3 more changes

In Release 16, enhancements were made to improve security and QoS handling for non-3GPP access. Specifically, the SA function was updated to support the construction of packet filters based on the N3IWF IP address and SPI for the IPsec SA, and to enable a dedicated child SA and a DSCP value for QoS flows. Additionally, editorial corrections were made to procedures such as the child SA deletion process.

• Packet filters based on N3IWF IP address and SPI for IPsec SA TS 24.501CR1231
• A dedicated child SA and a DSCP value for QoS flows TS 24.502CR0086
• Missing XML Data Type for Attributes in MBMS USD TS 26.346CR0658
• Update of requirements on UE to construct packet filters based on the N3IWF destination IP address and the SPI for the IPsec SA TS 24.501CR1364
• Remove editor's notes of child SA deletion procedure TS 24.502CR0150
• Minor editorial corrections pertaining to CR-0632r2 (SP-200397) which was inadvertently left over to be implemented in Section L.4.1 after SA#88-e TS 26.346

In Release 17, the SA (Service Announcement) function was enhanced to support dynamic updates to the Multimedia Broadcast/Multicast Service (MBS) service area for an ongoing multicast session via the MBS Service Announcement itself. Furthermore, the release introduced the capability to associate a specific MBS service area directly with a Temporary Mobile Group Identity (TMGI).

• [5MBP3]: Feature reduced FLUTE FDT Schema TS 26.346CR0661
• Paging with TMGI for multicast services TS 24.501CR3369
• clarification for QoS differentiation for User Plane IPsec Child SA in underlay network TS 23.501CR3394
• Associate the MBS service area with the TMGI TS 24.501CR3922
• Updating the MBS service area of MBS multicast session using MBS Service Announcement TS 24.501CR4225
• Providing TMGI to lower layer for paging TS 24.501CR4568

+ 3 more changes

In Release 18, the enhancements for the "SA" function included modifications to the IPsec Security Association (SA) procedure to indicate its Security Parameter Index (SPI). The release also provided clarifications and corrections for the Child SA creation procedure, specifically for PDU session modification and for scenarios involving non-3GPP access.

• Indicate the SPI for IPsec SA modification procedure TS 24.502CR0226
• Clarification of Child SA creation for PDU session modification TS 24.502CR0240
• Corrections for Child SA creation procedure for non-3GPP access TS 24.502CR0307
• Indicate to lower layer to delete stored TMGI R18 TS 24.501CR4810

In Release 19, the SA (Service Announcement) function was enhanced with a new procedure for In-session Unicast Repair for MBMS Object Distribution, allowing for the recovery of missed content during a multicast session. Additionally, the release introduced improvements to Time Synchronization for MBMS, increasing the accuracy and reliability of service delivery. These updates provided more robust mechanisms for file distribution and timing within the MBMS framework.

• [AMD_PRO-MED] In-session Unicast Repair for MBMS Object Distribution TS 26.346CR0677
• Improved Time Synchronization for MBMS TS 26.346CR0672