wiki:ACM_Mobicom2008

A Demonstration of Video over a Cooperative PHY layer Protocol

Authors: Shasi Raj Singh, Ehtesham Akhtar Siddiqui, Thanasis Korakis, Pei Liu, Shivendra S. Panwar

Demo presented at ACM MobiCom, San Francisco, September 2008

Abstract

Cooperative communication is a promising approach to improve the reliability of a received signal at the physical layer. Cooperating nodes create a virtual MIMO system that provides spatial diversity even though the nodes have a single antenna. Therefore, tremendous improvements in system capacity and delay can be achieved. An implementation approach has been pursued in this demonstration to confirm the viability and efficacy of cooperation at the physical layer. The implemented cooperative physical layer scheme is called CoopPHY and is based on Cooperative Coding. In this technique, the source node transmits only a portion of its encoded data bits based on channel conditions among cooperating nodes. Helper nodes transmit the rest of the encoded bits. The destination node, finally, combines and decodes signals received via different channels and therefore increases the decoding reliability. In this demo, a video clip is streamed froma server to a client using sequentially the CoopPHY scheme and a non-cooperative scheme. The CoopPHY protocol delivers a smooth user experience, while the video play-out over the non-cooperative scheme shows frequent distortions. the demo clearly demonstrates the performance superiority of the implemented cooperative PHY layer scheme, as compared to the tradidtional transmission techniques that are based on a single hop transmission.

{Singh:2008,
 Author = {Shashi Raj Singh, Ehtesham Akhtar Siddiqui, Thanasis Korakis, Pei Liu, Shivendra S. Panwar},
 title = {A Demonstration of Video over a Cooperative PHY layer Protocol},
 booktitle = {{ACM MobiCom}},
 month = sep,
 year = {2008},
 address = {San Francisco, CA},
}
Last modified 9 years ago Last modified on Sep 18, 2008, 3:47:35 PM

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