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Transport and Services Working Group

Document Charter Transport and Services Working Group WG (tsvwg)
Title Transport and Services Working Group
Last updated 2023-12-15
State Approved
WG State Active
IESG Responsible AD Zaheduzzaman Sarker
Charter edit AD Martin Duke
Send notices to (None)


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.