应用于无线传感器网络的自适应TDMA协议

Adaptive TDMA protocol for wireless sensor networks

提出了一种应用于无线传感器网络的自适应、低功耗的时分多址接入协议AT-MAC.该协议根据应用和拓扑的变化来自适应地伸缩时帧长度,提高了信道的利用率;采用二叉树结构来方便地管理时隙分配信息;基于两跳邻域信息为节点分配时隙,减少了申请冲突.时帧长度的可变和对邻域信息的获知使得AT-MAC具有良好的扩展性和适应能力.AT-MAC还采用节能模式来减少节点的能量消耗.仿真结果表明,AT-MAC可以有效地提高信道的利用率,缩短传输时延,并减少能量的消耗.

An adaptive energy-efficient TDMA-based media access control （MAC） protocol for wireless sensor networks, called AT-MAC, was proposed. AT-MAC can improve the channel utilization by adapting time frame length to the variations of topology and application. Also it can use the binary tree structure to efficiently manage the slot assignment information, and select a slot for a node based on the twohop neighborhood information to avoid collisions. AT-MAC is scalable and adaptable because of the changeable frame length and the knowledge of local topology information. Moreover, AT-MAC can use the energy-efficient mode to reduce the energy consumption. Simulation showed that AT-MAC can achieve the enhanced channel utilization, smaller time delay, and less energy consumption.