The IESG has approved the following document: - 'Stream Schedulers and User Message Interleaving for the Stream Control Transmission Protocol' (draft-ietf-tsvwg-sctp-ndata-13.txt) as Proposed Standard This document is the product of the Transport Area Working Group. The IESG contact persons are Mirja Kühlewind and Spencer Dawkins. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-ndata/ Technical Summary The Stream Control Transmission Protocol (SCTP) is a message oriented transport protocol supporting arbitrarily large user messages. This document adds a new chunk to SCTP for carrying payload data. This allows a sender to interleave different user messages that would otherwise result in head of line blocking at the sender. The interleaving of user messages is required for WebRTC Datachannels. Whenever an SCTP sender is allowed to send user data, it may choose from multiple outgoing SCTP streams. Multiple ways for performing this selection, called stream schedulers, are defined. A stream scheduler can choose to either implement, or not implement, user message interleaving. Working Group Summary Nothing out of the ordinary. Document Quality This document is one of several relating to WebRTC Datachannels, and has received inputs from other related WGs. The FreeBSD kernel implementation and the userland stack usrsctp (which shares most of the code) both support sending and receiving of I-DATA chunks. An implementation of interleaving schedulers was planned for the IETF 99 timeframe. Personnel Who is the Document Shepherd? Gorry Fairhurst Who is the Responsible Area Director? Spencer Dawkins
