NS2，时间同步，模拟分簇结构通信过程，多播模式，簇头和簇内节点通信，包含tcl（通信过程模拟源码）、trace文件（模拟通信的数据）、gnp文件（用于结果作图）-NS2, time synchronization, simulation clustering structure communication process, multicast model, communication within the cluster head and cluster nodes, including TCL (communication process simulation source), the trace file (analog communication of data), GNP file (for the drawing)