基于竞争允许TDMA的无线传感器MAC层协议

无线传感器网络在许多重要领域有着广泛的应用，而传感网的媒体访问控制子层(MAC)协议对传感器网络的运行和性能具有重要影响。该文概述了目前存在的传感网MAC协议的设计思想，在SMAC协议的基础上，将TDMA和CSMA两种思想结合起来并与SMAC协议同步机制相统一，提出了一个新的基于竞争允许TDMA的无线传感器网络MAC协议。模拟结果显示，与SMAC协议相比，该协议在数据包延迟、能量消耗及数据包的接收率等性能上有很大提高。

MAC Protocol for Wireless Sensor Networks Based on Contention-allowed TDMA

Wireless sensor networks have been widely used in many important areas.Medium access control(MAC) protocols have a significant effect on the function and performance of sensor networks.This paper summarizes the present design paradigms of the MAC protocol in wireless sensor networks.Then,based on the sensor MAC(SMAC) protocol,and by jointly considering the time division multiple access(TDMA),carrier sense multiple access(CSMA) and the synchronization scheme of the SMAC,a new contention-allowed TDMA based MAC protocol for wireless sensor networks(contention-allowed TDMA based SMAC,C-TDMA-SMAC) is proposed.The simulation results show that,compared with SMAC protocol,this protocol has improved a lot in the delay of packets,energy consumption and the reception rate of the packets.