一种基于分簇的无线传感器网络混合访问协议

A Cluster-based Hybrid Access Protocol for WSN

提出一种基于分簇的混合访问协议以提高无线传感器网络的性能。其基本思想是混合CSMA和TDMA协议的优点,能够根据流量水平的变化在这两个协议之间平滑地切换。当网络流量较高并存在冲突时使用TDMA协议,而在分簇建立阶段以及冲突率较低的场景下使用CSMA协议。在NS-2中的仿真实验结果表明,提出的混合访问协议与LEACH-C协议相比,在流量变化的条件下,网络的吞吐量有很大的提高,同时降低的传输延迟。

In this work,assuming a clustering routing scheme,the objective is to improve the performance of wireless sensor networks using a hybrid access protocol.The main idea is to use a protocol which incorporates the characteristics of both CSMA and TDMA medium access schemes and smoothly switches between the two depending on the level of traffic load of the sensor nodes.TDMA is used when the network is subject to high traffic or contention and CSMA is used during the clusters＇ setup phase as well as low contention scenarios.