一种基于节点位置信息的无线传感器网络并行传输MAC协议

摘要

针对无线传感器网络多跳通信方式产生的暴露终端问题,提出了一种基于地理位置信息的高效并行传输LACT-MAC协议.该协议突破了传统基于CSMA协议对并行传输的限制,利用节点地理位置信息实现了暴露终端的并行传输,有效地提高了宝贵无线信道资源的复用效率.分析了根据节点的位置坐标并行传输暴露终端节点的可行性,并通过并行传输检测完成了传输过程.仿真结果证明,与标准的IEEE 802.11 DCF协议比较,LACT-MAC协议能显著提高网络的平均吞吐量,降低数据传输延迟,有效提高无线传感器网络效率和性能.%Aiming at the exposed terminal problems in multi-hop wireless sensor networks, this paper proposed the efficient concurrent transmission LACT-MAC protocol based on geographical location information. The protocol breaks through the limit of concurrent transmission based on traditional CSMA MAC protocols, for this protocol exploits nodes' geographical location information to achieve the concurrent transmission of exposed terminal, so as to enhance the reuse efficiency of the valuable wireless channel resources. According to the location coordinates of the nodes, this paper explored the feasibility analysis of concurrent transmission of exposed terminal node, and completed the concurrency check. Simulation results show that, compared to IEEE 802. 11 DCF protocol, LACT-MAC protocol can significantly improve the average throughput of the network,reduce data transmission delay,and effectively improve the efficiency and performance in wireless sensor networks.