Requirements for the Optimization of Session Setup Delay and Service Interactivity in Streaming Services over 3G

Konferenz: European Wireless 2006 - 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications
02.04.2006 - 05.04.2006 in Athens, Greece

Tagungsband: European Wireless 2006

Seiten: 10Sprache: EnglischTyp: PDF

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Viamonte, David; Calveras, Anna; Paradells, Josep; Gómez, Carles (Technical University of Catalonia, Telematics Engineering Department, c./ Jordi Girona 1-3, 08034, Barcelona, SPAIN)

Session setup delay in Packet Switched Streaming (PSS) services over Third Generation (3G) wireless networks is impacted by Real-Time Streaming Protocol (RTSP) and Session Description Protocol (SDP) signalling exchange and negotiation, as well as media buffering at the terminal before playback. The paper discusses PSS session setup delay contributions, and explains which would be the requirements that should be fulfilled in order to optimize that setup delay over a 3G network. Taking into account those requirements, the paper outlines a generic mechanism, the RTSP early setup. The proposal is to reduce delay by combining RTSP message pipelining and early activation of the secondary connection (PDP-Contexts) that will carry Real-time Transport Protocol (RTP) media over the 3G network. This new feature would allow for shorter waiting times when starting a new streaming session or when switching channels in a Mobile-TV environment.