基于缓存管理的网络编码中继传输方案

针对中继协作无线网络中节点缓存空间有限以及传输和缓存数据包都存在开销等问题进行了研究，提出了一种基于缓存管理的网络编码中继传输方案。在传输过程中该方案以最小化系统开销为目标，考虑多流综合优化问题，利用马尔可夫链对缓存队列进行建模分析。结合编码流速率增加编码机会，获得中继处不同流的缓存阈值，更合理地实现了编码决策。分析与仿真结果表明该方案能有效权衡编码机会和开销，相比其他方案能有效降低时延且提高网络吞吐量。

Network coding relay transmission scheme based on buffer management

Focusing on the problems that the limited buffer space, and the overhead of transmitting and buffering packets in relay-assisted wireless network, this paper proposed a RTBM scheme. In order to minimize the system overhead during transmission, the RTBM considered multi-stream comprehensive optimization, and used the Markov chain to model and analyze the buffer queue. Combined the the encoding stream rate to increase the coding opportunities, the scheme determined the buffer thresholds of different queues and implemented the coding decision more reasonably. The simulation results show that the scheme can effectively balance the coding opportunities and overheads, and can effectively reduce the delay and improve the network throughput.