摘要： 对于有损链接无线网络，机会路由的性能优于传统单播路由，然而由于无线传感器网络具有很强的占空比特性，使得现有的机会路由协议不适用于无线传感器网络。为此，提出一种基于占空比唤醒估计值(EDC)的机会路由协议，将EDC度量的关键特性作为路由度量，以支持分布式计算，从而生成无回路路由拓扑。通过理论分析表明EDC度量可以近似得出报文转发需要的占空比唤醒真实值。Twist和Motelab测试床上的实验结果证明，与基于预期传输次数的机会路由协议相比，该协议在无线电占空比值、时延和转发节点数量等方面性能更优。

关键词: 机会路由, 无线传感器网络, 占空比, 单播路由, 平均时延, 平均跳数

Abstract: Opportunistic routing is widely known to have substantially better performance than traditional unicast routing in wireless networks with lossy links. However, Wireless Sensor Network(WSN) has heavily duty cycle, which renders existing opportunistic routing schemes impractical. In this paper, it proposes a novel opportunistic routing protocol based on Estimated Duty Cycled Wake-ups(EDC). It establishes key properties of EDC as routing metric to support distributed computing, and it can leads to a loop free topology. In addition, theoretical analysis shows that EDC is an accurate approximation of the true number of duty-cycled wake-ups required to forward the packet. Experimental result on Twist and Motelab testbed shows that the performance of the proposed protocol is better than the ETX-based opportunistic routing protocol in terms of radio duty cycle, time delay and forwarding node number.

Key words: opportunistic routing, Wireless Sensor Network(WSN), duty cycle, unicast routing, average delay, average hop coun

中图分类号: 

• TP391