基于网络编码的机会路由算法优化

The Optimization of Opportunistic Routing Protocol Mechanism Based on Network Coding

针对基于网络编码的机会路由协议MORE中采用探测包大小、探测周期固定的路由探测机制,提出一种探测周期、探测包大小可调的动态探测机制。通过对数据传输环境的监测,调整探测周期,减小网络环境变化对网络性能的影响;通过对传输数据包大小的估算,调整探测包大小,减小数据传输概率探测误差。仿真结果表明,该机制不仅能够探测更加真实的网络链路性能,提升网络吞吐量性能,而且增强了路由协议对无线网络动态特性的适应性。

Compared with the routing detection mechanism with fixed-size detection packet and fixed-cycle in opportunistic routing protocol based on network coding（MORE）, a dynamic detection mechanism is proposed in this paper, in which detection cycle and detection packet size are both adjustable. The protocol adjusts detection cycle to reduce the impact on network performance from environment changes by monitoring environmental change, and meanwhile adjusts detection packet size to reduce the detecting errors by estimating the size of data packet. The simulation results show that the proposed mechanisms could not only detect the closer network performance to the real one and improve the network throughput, but also enhance the adaptability of routing protocol to the dynamic nature of the wireless network.