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An Energy-Aware Multi-tree Video Multicast Scheme in Wireless Ad Hoc Networks  

Park, Jae-Young (인프라웨어)
Kang, Kyung-Ran (아주대학교 정보및컴퓨터공학부 컴퓨터통신연구실)
Cho, Young-Jong (아주대학교 정보및컴퓨터공학부 컴퓨터통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.12B, 2009 , pp. 1336-1348 More about this Journal
Abstract
In this paper, we propose an energy-aware multi-tree video multicast scheme for wireless ad hoc networks. Some network nodes may have energy enough to receive and forward the whole video content whereas some may not. Even though the video quality may vary depending on the remaining energy, our scheme enables the low-energy nodes to join the video multicast session. The video stream is split into a set of multiple and independent descriptions by MDC (Multiple description coding) scheme. Each description corresponds to a substream and number of substreams determine the video quality. The member nodes determine how many substreams it would receive depending on the remaining energy and expected amount of packets per substream. So does the intermediate tree nodes. That builds a tree per substream and multiple trees per session. The data source disseminates each substream through corresponding tree. The video quality of the member nodes varies according to number of participating trees. We evaluate the performance of our scheme by simulation. Our scheme showed better peak signal to noise ratio and extended the lifetime of the network nodes compared with MAODV, which builds a single tree, and MT-MAODV, which builds multiple trees but does not consider the available energy.
Keywords
Energy-Aware; Multi-Tree Multicast; Video Multicast; Wireless Ad Hoc Network;
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