一种新颖的无线传感器网络双向路由协议

A New Bidirectional Routing Protocol for Wireless Sensor Networks

目前对于传感器网络路由协议的研究越来越引起科学和工程界的广泛重视,但对于双向路由协议的研究还相对比较少,这是由于在传感器网络中,现有带宽对上行和下行链路同时工作支持得并不是很充分。一般来说,基于树型结构的上行路由被用来从感知节点接收数据,而下行路由一般以泛洪的方式广播兴趣信息到感知节点,这导致在下行链路上经常出现过载的情况。本文基于新颖的地址标记方式提出了一个有效的传感器网络双向链路路由协议,而且该方式在每个节点上只占用很小的地址空间。仿真结果表明,相对于传统的泛洪方式的路由协议来说,我们所提出的路由协议所产生的控制包数量远远小于已有路由协议。

In wireless sensor networks, the existing routing protocols do not support bi-directlonal routing due to the msufficient resources of simultaneous uptink and downtink. While tree-based uplink routing is used for collecting data from the sensor nodes, downlink routing is used to send any interests to the sensor nodes by flooding. As a result, it causes a lot of overhead in the downlink direction. In this paper, we propose an efficient bi directional routing protocol with a new address notation for wireless sensor networks, thereby minimizing the memory requirement on each node. The proposed protocol has been validated by conducting some experiments on a test bed. The test results show that our routing protocol provides higher efficiency in terms of the number of control packets compared to the traditional flooding approach in the downlink direction for wireless sensor networks.