无线网络中基于机会网络编码的加权广播重传
doi: 10.3724/SP.J.1146.2013.00598
Weighted Broadcasting Retransmission Based on Opportunistic Network Coding in Wireless Networks
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摘要: 在无线广播网链路状态不同和丢包率高的条件下，基于机会网络编码的数据分发策略面临传输效率低和计算复杂度高的问题。针对这一问题，该文提出一种新的基于机会网络编码的加权广播重传(Weighted Opportunistic Network Coding Retransmission, WONCR)方案。该方案通过构建加权数据包分布矩阵(Weighted Packet Distribution Matrix, WPDM)，在重传过程中采用新的调度算法进行编码数据包的选取，并将选取的数据包进行XOR编码后再重传。机会仿真结果表明，WONCR方案提高了传输效率，且计算开销较小，实现了无线广播网中高效、可靠的数据分发。Abstract: A novel Opportunistic-Network-Coding based Weighted broadcasting Retransmission (WONCR) approach is proposed to deal with the problem of data dissemination scheme based on opportunistic network coding in wireless broadcasting networks, which are under the conditions of high packet loss probability and different state of links. This approach implements a new scheduling algorithm based on the Weighted Packet Distribution Matrix (WPDM) to realize the selection of coded packets before XOR coding and retransmitting. The analysis and simulations show that the transmission efficiency is improved significantly and the computational complexity is low. Hence, the high-efficiency and reliable data dissemination are achieved in wireless broadcasting networks.
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