SA2 SP-181122

Enhancement of Ultra-Reliable Low-latency support in the 5G core (SP-181122) is a 3GPP completed work item (WID) for Release 16 as part of the stage 2 work (5G phase 2) under WG SA2 - architecture.

Its focus is on enhancing the 5G core network defined in TS 23.502 and TS 23.503 based on the study conclusions of FS_5G_URLLC in TR 23.725 to support URLLC services within 5G system.

It is aimed at supporting:

• High-reliability by redundant transmission in user plane.
• Low latency and low jitter during handover procedure.
• QoS monitoring to assist URLLC services. 

Division of E2E PDB (Packet Delay Budget) and automated GBR service reovery.

It also aims to enhance session continuity during UE mobility, including enhancements of coordination between AF (application function) and 5GS, PSA (PDU session anchor) relocation, URLLC (uplink classifier) relocation.

Its overarching goal is to provide data transfer capability with strict performance requirements, e.g. very low latency and high-reliability requirements to fulfil the demands of vertical markets and applications.

Huawei is the rapporteur of this WID with Supporting Individual Members (SIMs) from EU and global supply side companies.