3GPP Access Traffic Steering Switching and Splitting (ATSSS) - Overview for IETF Participants

Fri, 10/29/2021 - 12:51 by Maxime Piraux


This document briefly presents the Access Traffic Steering, Switching, and Splitting (ATSSS) service being specified within the 3rd Generation Partnership Project (3GPP). The ATSSS service provides network support for multihomed devices to select a path for transmission (steer), move traffic from one path to another (switch), or use multiple paths simultaneously (split). TS 23.501 specifies an ATSSS architecture for TCP traffic. This document presents a snap-shot of the ongoing discussion in the 3GPP to enable ATSSS for non-TCP traffic, based on the use of QUIC, and assesses to what extent IETF specifications can be used to meet the ATSSS design goals. Apparent gaps are also documented.

Mohamed Boucadair, Olivier Bonaventure, Maxime Piraux, Quentin De Coninck, Spencer Dawkins, Mirja Kühlewind, Markus Amend, Andreas Kassler, Qing An, Nicolas Keukeleire and SungHoon Seo
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