There are four TSVWG drafts at the RFC Editor in MISSREF state (waiting for referenced RFCs to arrive): Circuit Breakers, GRE in UDP, WebRTC Diffserv usage and DTLS encapsulation of SCTP. There are two drafts at the IESG: 1) The UDP Guidelines draft has been approved by the IESG, but needs another revision to make the final changes before that approval can be announced and the draft sent to the RFC Editor. 2) The Diffserv Interconnection draft has completed IETF Last Call and is on the December 1 IESG Telechat agenda.
The Tunnel Congestion Feedback draft WGLC will conclude just before the Seoul meeting week. Both the 802.11 (WiFi) Diffserv draft and the SCTP stream scheduling and interleaving draft expected to go to WGLC in the near future.
ECN (Explicit Congestion Notification) is a theme of proposed new TSVWG work - a draft will be discussed in Seoul that makes the necessary standards track changes to ECN that will enable the experiments to proceed. TCP-specific experimental modifications of ECN will be done in the TCPM WG. L4S (successful BOF in Berlin), including its use of ECN to distinguish low latency service traffic, will also be experimental and is expected to be handled by TSVWG. A new draft has been adopted to specify ECN propagation across IP-in-IP tunnels that include a shim header (this is an extension of RFC 6040).
The AQM (Active Queue Management and Packet Scheduling) WG is nearing the end of its life - future AQM-related work is likely to be done in TSVWG.
TSVWG continues to pick up transport work that does not have a home in another working group, e.g., revision of the Diffserv LE (Lower Effort, i.e., less-than-best effort) specification and errata for the base SCTP spec (RFC 4960).