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Transport and Services Working Group (tsvwg)

WG	Name	Transport and Services Working Group
	Acronym	tsvwg
	Area	Web and Internet Transport (wit)
	State	Active
	Charter	charter-ietf-tsvwg-07 Approved
	Status update	Show Changed 2019-02-05
	Document dependencies	Document dependencies Loading... Pan and zoom the dependency graph after the layout settles. Show legend Loading...
	Additional resources	GitHub Issue tracker Wiki Zulip Stream
Personnel	Chairs	Gorry Fairhurst, Marten Seemann
	Area Director	Zaheduzzaman Sarker
Mailing list	Address	tsvwg@ietf.org
	To subscribe	https://www.ietf.org/mailman/listinfo/tsvwg
	Archive	https://mailarchive.ietf.org/arch/browse/tsvwg/
Chat	Room address	https://zulip.ietf.org/#narrow/stream/tsvwg

Charter for Working Group

The Transport and Services Working Group (TSVWG) is the forum for development and publication of RFCs dealing with transport-layer topics that are not in scope of an existing working group or do not justify the formation of a new working group.

A non-exhaustive list of transport topics includes mechanisms that deal with packetization and reassembly, ports, maximum transmission unit discovery, reordering, congestion control, loss detection and recovery, queue management, explicit congestion notification, multihoming, stream multiplexing, and quality of service (including DSCP and RSVP). Transport-layer protocols include TCP, QUIC, SCTP, UDP, and DCCP. TSVWG maintains these protocols and mechanisms in the absence of a specialized working group.

The TSVWG mailing list is an open discussion forum for such work items, when they arise. The working group meets if there are active proposals that require discussion. The working group milestones are updated as needed to reflect the current work items and their associated milestones, with the approval of the responsible AD.

The currently active TSVWG work items mostly fall under the following topics:

(A) Maintenance and extension of the Stream Control Transmission Protocol
(SCTP), User Datagram Protocol (UDP), and Datagram Congestion Control Protocol (DCCP), as these do not have dedicated working groups.

(B) Explicit Congestion Notification (ECN), as the working group improves existing directives for tunnelling and observes the recently launched experiment with Low Latency, Low Loss, and Scalable Throughput (L4S).

(C) Maintenance of IP Differentiated Services (DiffServ) mechanisms, which involves mostly advisory documents on the use of DiffServ in specific application scenarios. Other work items related to DiffServ require Area Director approval.

Work in TSVWG must satisfy four conditions:
(1) WG consensus on the suitability and projected quality of the proposed work item.
(2) A core group of WG participants with sufficient energy and expertise to advance the work item according to the proposed schedule.
(3) Commitment from the WG as a whole to provide sufficient and timely review of the proposed work item.
(4) Agreement by the AD, who, depending on the scope of the proposed work item, may decide that an IESG review of adoption is needed first.

Milestones

Date	Milestone	Associated documents
Mar 2025	Submit "DTLS over SCTP" as a Proposed Standard RFC	draft-ietf-tsvwg-dtls-over-sctp-bis
Mar 2025	Submit "Authenticated Chunks for the SCTP" as a Proposed Standard RFC	draft-ietf-tsvwg-rfc4895-bis
Dec 2024	Submit "User Ports for Experiments " for publication as a Proposed Standard RFC.	draft-ietf-tsvwg-usr-exp
Nov 2024	Submit "Operational Guidance for Deployment of L4S in the Internet" as an Informational RFC	draft-ietf-tsvwg-l4sops
Nov 2024	Submit "Careful convergence of congestion control from retained state" for publication as a Proposed Standard RFC.	draft-ietf-tsvwg-careful-resume
Sep 2024	Submit " Transport Options for UDP" as a Proposed Standard RFC	draft-ietf-tsvwg-udp-options
Sep 2024	Submit "Datagram PLPMTUD for UDP Options" for publication as a Proposed Standard RFC.	draft-ietf-tsvwg-udp-options-dplpmtud
Aug 2024	Submit "A Non-Queue-Building Per-Hop Behavior (NQB PHB) for Differentiated Services" as a Proposed Standard RFC	draft-ietf-tsvwg-nqb

Done milestones

Date	Milestone	Associated documents
Done	Submit " DCCP Extensions for Multipath Operation with Multiple Addresses" as a Proposed Standard RFC	draft-ietf-tsvwg-multipath-dccp
Done	Submit 'Guidelines for Adding Congestion Notification to Protocols that Encapsulate IP' as a BCP RFC	rfc9599 (was draft-ietf-tsvwg-ecn-encap-guidelines)
Done	Submit 'Propagating Explicit Congestion Notification Across IP Tunnel Headers Separated by a Shim' as a Proposed Standard RFC	rfc9601 (was draft-ietf-tsvwg-rfc6040update-shim)