Aiming at the differences among the monitoring time slots of the frames of different boundary nodes in S-MAC protocol, it is put forward that a scheduling-table list is preserved in each node,and hereby the spanning tree synchronization algorithm is set up. The amount of nodes within the cluster is counted by making use of the spanning tree, and based on this the suitable scheduling-table lists in the boundary nodes within the cluster can be chosen so as to realize the synchronization of the whole network in the scheduling list and the merging of the clusters, as well as remove the boundary nodes. The simulation result indicates that the improved protocol re- duces the energy consumption and the delay of data transmission.%针对S-MAC协议中不同虚拟簇边界节点的帧的监听时隙不同，提出了在每个节点中保存一个调度表列表，设计创建生成树同步算法。根据优先级标准，在虚拟簇边界节点上进行调度取舍，实现调度的全网同步，完成虚拟簇的合并，消除边界节点，从而解决边界节点能耗过快的问题。仿真结果表明，相比于原有协议，改进后的协议减少网络能耗。降低了数据传输时延。
展开▼
