Introduction of PPSP Yunfei 88 Nov 3, 2013

Agenda PPSP Outline Progress of PPSP PPSP Future Work Plan Thoughts on the Synergy with ICN

PPSP Outline PPSP: –Peer to Peer Streaming Protocol WG –Defining Tracker-based P2P streaming protocol Two protocols : –PPSP-TP:Tracker protocol Handling the initial and periodic exchange of meta information between trackers and peers, such as peer lists and content information. –PPSPP: Peer protocol Controling the advertising and exchange of media data availability between the peers.

Progress of PPSP Finished RFC6972: Problem statement and requirements WG drafts: –Survey of P2P streaming systems, almost done –Peer protocol, in the late of the standarization –Tracker protocol, in the first half of the standarization

Progress of PPSPP Peer protocol:Gossip-like protocol with periodic, pairwise exchanges of neighbor and media chunk availability information –Two independent implementations –Message semantics well defined and consensus are achieved –Message format on the wire was defined and just updated in accordance with IETF style (TLV like) under the guidance of IETF experts

Peer Protocol Message Review HANDSHAKE DATA ACK INTEGRITY REQUEST CANCEL CHOKE and UNCHOKE PEX_REQ, PEX_RES:Peer Address Exchange KEEPALIVE

PPSPP Transport Layer Issues Currently UDP based TCP based spec is under construction Congestion Control –LEDBAT

Progres of PPSP-TP Tracker protocol: Modeled as a request/response protocol between peers and trackers –Only address the BASIC functionalities –Extended functionalities are addressed in seperate protocol –Message semantics/syntax are relatively –Large arguments on encodings Binary based Text based May leave the options in implementation

Tracker Protocol Message Review CONNECT Request/Response FIND Request/Response STAT_REPORT Request/Response Error and Recovery Request/Response

PPSP Future Work Plan Incorpate PPSP protocols into RTCWEB framework Senarios –P2P streaming with browser –Large multiparty video conference Have discussed the willingness with Mozilla Call for volunteers

Thoughts on the Synergy with ICN PPSP is resided in current Internet ICN is envisioned to support large scale streaming with in- replication using caches in future Internet Same points –Chunk based –Multiple sources/interfaces Difference –User cache+some in-network cache VS large number of in- network cache –The behavior of cache: Data availabity(pull) VS Data aggregation(push?) –The place of data exchanging:Destination VS on the way Researchs in Delft Univeristy are implementating ICN router using PPSPP message(not all the process of ICN) –More in "getting/receiving"operation than in "forwading" sense