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在实用网络编码系统的基础上,通过在编码端对分组数据包的编码向量引入三种保护策略:循环冗余校验、空时分组码以及根据不同的信噪比在两种保护方法之间切换,来提高和平稳通信质量。仿真结果表明:这三种机制,都可以有效提高实用网络编码系统中的通信质量。而采用保护模式切换的方案可以在大量减少重传次数的基础上消除通信质量不稳定的问题。
On the basis of practical network coding system, three protection strategies are introduced into the encoding vector of packet data packets at the encoding end: cyclic redundancy check, space-time block code, and between two protection methods according to different signal-to-noise ratios Switch, to improve and smooth the quality of communications. The simulation results show that these three mechanisms can effectively improve the communication quality in practical network coding system. The protection mode switching scheme can greatly reduce the number of retransmissions based on the elimination of the problem of unstable communication quality.