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目前无线传感器网络中的MAC协议可分为发送端启动和接收端启动两类。同步的发送端启动协议同步代价高,基于前导的异步协议网络利用率低,而接收端启动的算法会产生发送端盲等等问题。本文结合这两类协议的优点,提出一种可自适应变换数据传输模式的MAC协议(IL-MAC)。该协议根据节点的消息队列长度决定当前使用哪种传输模式,并通过局部同步算法减少发送端与接收端在建立连接时的盲等,解决了以上问题。在网络仿真平台NS2上的仿真实验表明,IL-MAC要优于RI-MAC,尤其在高负载下优势明显。
At present, the MAC protocol in wireless sensor networks can be divided into two types, that is, the sender and the receiver are started. Synchronization of the sender to start the protocol synchronization costly, leading-based asynchronous protocol network utilization is low, and the receiver-initiated algorithm will have to send the terminal blind and so on. Combining the advantages of these two types of protocols, this paper proposes a MAC protocol (IL-MAC) that can adaptively transform the data transmission mode. According to the message queue length of the node, the protocol decides which transmission mode is currently used and solves the above problem by using the local synchronization algorithm to reduce the blindness between the sender and the receiver when establishing the connection. The simulation experiment on network simulation platform NS2 shows that IL-MAC is superior to RI-MAC, especially under high load.