標題: Efficient Packet Recovery Using Prioritized Network Coding in DVB-IPDC Systems
作者: Yang, Wen-Hsin
Wang, You-Chiun
Tseng, Yu-Chee
資訊工程學系
Department of Computer Science
關鍵字: Digital video broadcasting (DVB);network coding;packet recovery;WiMAX;wireless network
公開日期: 1-Mar-2012
摘要: The DVB-H standard is proposed to disseminate videos to mobile devices. However, packet loss is inevitable due to the broadcasting nature. To deal with this issue, DVB-IPDC suggests incorporating another wireless network for data retransmission. This paper takes a WiMAX network as an example in DVB-IPDC and models its channel as repetitive frames. During each frame, mobile devices sends their recovery requests of lost packets to a WiMAX base station and the base station adopts network coding to broadcast these packets. This paper then formulates a prioritized network coding (PNC) problem that asks how the base station uses at most tau coded packets in each frame such that it can recover the maximum aggregate number of lost packets while minimize the aggregate number of packets discarded due to out of deadlines. We develop a solution using XOR coding, which constructs a weighted bipartite graph to calculate the benefit to broadcast each coded packet. Then, the solution tries to maximize the overall benefit by finding a maximum-weighted tau dominating set. The contribution of this paper is to propose a new PNC problem in DVB-IPDC systems and develop an efficient PNC solution.
URI: http://dx.doi.org/10.1109/LCOMM.2012.020212.112535
http://hdl.handle.net/11536/15572
ISSN: 1089-7798
DOI: 10.1109/LCOMM.2012.020212.112535
期刊: IEEE COMMUNICATIONS LETTERS
Volume: 16
Issue: 3
起始頁: 382
結束頁: 385
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