The IESG has approved the following document: - 'Peer-to-Peer Streaming Peer Protocol (PPSPP)' (draft-ietf-ppsp-peer-protocol-12.txt) as Proposed Standard This document is the product of the Peer to Peer Streaming Protocol Working Group. The IESG contact persons are Spencer Dawkins and Martin Stiemerling. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-ppsp-peer-protocol/ Technical Summary The Peer-to-Peer Streaming Peer Protocol (PPSPP) is a protocol for disseminating the same content to a group of interested parties in a streaming fashion. PPSPP supports streaming of both pre-recorded (on-demand) and live audio/video content. It is based on the peer- to-peer paradigm, where clients consuming the content are put on equal footing with the servers initially providing the content, to create a system where everyone can potentially provide upload bandwidth. It has been designed to provide short time-till-playback for the end user, and to prevent disruption of the streams by malicious peers. PPSPP has also been designed to be flexible and extensible. It can use different mechanisms to optimize peer uploading, prevent freeriding, and work with different peer discovery schemes (centralized trackers or Distributed Hash Tables). It supports multiple methods for content integrity protection and chunk addressing. Designed as a generic protocol that can run on top of various transport protocols, it currently runs on top of UDP using LEDBAT for congestion control. Working Group Summary There were several issues raised during WGLC; however, none were particularly rough and authors came up with the text that resolves these issues thus consensus was achieved in all cases. After that, some technical comments were made during the AD review and all were addressed and accepted with consensus. Document Quality This draft has some implementations and evaluations in the lab. It is expected that with the approval of this document the number of implementations will increase. During the WGLC, this draft has been deep reviewed by Riccardo Bernardini and Yunfei Zhang. The issues of protocol versioning and guideline absence on when to declare a peer dead are addressed. The AD found some high level issues which have been already solved. One issue is that PPSPP as a Standards Track protocol cannot normatively rely on LEDBAT which is an Experimental congestion control mechanism. The problem is solved by having measurements and deployment results that show the widespread use of LEDBAT in current P2P systems and towards a DOWNREF procedure. Personnel Document Shepherd: Rachel Huang Responsible AD: Martin Stiemerling
