低开销的无线网络编码机会路由协议设计

Design of Low Overhead Opportunistic Routing Protocol for Wireless Network Coding

针对基于无线Mesh网络编码的机会路由协议的节点转发冗余问题，从线性空间的角度对该类协议的信息传输过程进行建模与分析，提出一种基于动态冗余控制的无线Mesh网络编码机会路由协议。该协议利用零空间确认技术估计各节点的更新信息总量，根据更新总量动态调整节点转发冗余，通过引入转发优先级调度机制，避免不同的转发节点重复转发来自于相同线性空间的编码包。仿真实验结果显示，与经典的MORE协议相比，该协议能提高30％-100％的网络吞吐量，同时降低20％-45％的归一化开销。

Aiming at the problem of sending redundant in opportunistic routing protocols based on wireless Mesh network coding, this paper proposes a wireless Mesh network coding opportunistic routing protocol based on dynamic redundancy control, and the transmitting process of this class of protocols is modeled and analyzed by linear space theory. It uses null space acknowledgement to evaluate the amount of update information, and dynamically adjusts node sending redundancy according to total update information. In addition, a forwarding priority scheduling mechanism is introduced to avoid duplicate transmissions of the same linear space from different forwarding nodes. Simulation experimental results show that the protocol improves 30%-100% network throughout and 20%---45% normalized transmission cost compared with MORE protocol.