ns-2 仿真802.11低功耗模式。主要修改的是ns-2.33/mac下的文件。查看文件README.802_11_power_management可获得详细描述。-802.11 ns-2 simulation low-power mode. The main change is that the files under ns-2.33/mac. View a detailed descr iption of the file README.802_11_power_management av