基于二进制网络编码的无线广播重传方法  

Wireless Broadcast Retransmission Approach Based on Binary Network Coding

作　　者：苟亮[1] 张更新[1] 孙伟[1] 徐志平[2] 

机构地区：[1]解放军理工大学通信工程学院 [2]中国人民解放军96275部队

出　　处：《无线电通信技术》2013年第3期7-11,共5页Radio Communications Technology

基　　金：国家自然科学基金项目(61032004)

摘　　要：为了提高无线广播网络中数据包的传输效率,提出了一种新的基于二进制网络编码的高效无线广播重传方法(WBRBNC)。法基于数据包分布矩阵(PDM),在广播重传过程中使用一种新的数据包算法选取编码包,对这些丢包采用二进制网络编码方法进行编码,然后再进行广播,使一次广播重传可以使多个具有不同丢包的接收机受益。分析和仿真表明,该方法能有效保证接收节点的编码可解性,使重传次数显著减少,更接近于理论值,从而大大提高了传输效率。另外,该方法计算开销小,很适合应用在卫星广播网和无线传感器网等资源受限的系统中。A novel and high-efficiency retransmission approach based on binary network coding is proposed to improve the transmission efficiency in wireless broadcast networks. Based on a data packet distribution matrix （PDM）, this approach uses a novel data packet algorithm to select coding packets, and for these lost packets, adopts binary network coding approach to implement coding and broadcast. Multiple receivers with different lost packets can benefit from each broadcast retransmission. The analysis and simulation results show that this approach can effectively ensure the resolvability of binary network coding,and significantly reduce the number of transmissions to make it be close to the theoretical value and greatly improve the transmission efficiency. In addition, the computational complexity of our scheme is reduced to fit for such resource-limited systems as satellite broadcast networks and wireless sensor networks.

关 键 词：无线广播重传 网络编码 重传 传输次数 计算复杂度 

分 类 号：TN934[电子电信—信号与信息处理]