Study on Multi-Access (DualSteer and ATSSS_Ph4)
The scope of this Technical Report is to:
- study and identify potential architecture and system level enhancements for the 5G system to support the operation of the DualSteer Device that is capable of traffic steering and switching of user data for different services across two 3GPP access networks. The study addresses the service requirements documented in TS 22.261 [2] and focuses on various aspects of architecture and functional enhancements including:
- impacts on subscription;
- impacts on registration procedure; and
- impacts on session management procedure and policies.
- study how the MPQUIC steering functionality defined in Rel-18 ATSSS can be extended to be able to steer, switch, and split non-UDP traffic (TCP, IP, Ethernet traffic); and
- study whether and how an alternative architecture and system level enhancements for ATSSS that does not require the existing non-3GPP interworking/gateway function, i.e. N3IWF, TNGF.