一种用于水声传感网的MAC层协议

摘要

针对分簇的水声传感网，提出了一种基于时分多址( TDMA)的MAC层协议———Cluster-TD-MA。该协议主要由规划阶段和传输阶段组成。规划阶段，首先由网关节点规划能造成簇间干扰的子节点的传输，其次由各簇头节点分别规划本簇内其他子节点的传输；传输阶段，子节点根据规划表周期性地向簇头节点发送数据，这些数据最终汇聚到网关节点。该协议简单有效地解决了引起簇间干扰子结点的传输规划问题。 C++仿真实验表明，该协议具有良好的吞吐率和能量效率性能。%This paper proposes a MAC protocol based on time-division multiple-access( TDMA) for clus-tered underwater acoustic sensor networks ( UW-ASN) , which is named Cluster-TDMA ( C-TDMA) . C-TDMA mainly consists of scheduling stage and transmission stage. In scheduling stage, the transmissions of sensor nodes causing inter-cluster interference are scheduled first by the gateway node. Then cluster head nodes separately schedule the transmissions of other nodes in their own clusters. In transmission stage, sensor nodes periodically send data packets which finally converge to the gateway node to cluster head nodes according to schedule table. C-TDMA simply and effectively solves the problem of scheduling the transmissions of sensor nodes causing inter-cluster interference. The C++ simulation results show that C-TDMA works well in terms of throughput and energy efficiency.