文章分析了WiMAX系统中省电模式的特点和发展趋势，具体介绍了IEEE 802.16e中的睡眠和空闲模式，并对其工作原理和MAC流程进行了详细研究-The article analyzes the characteristics and development trend of the power saving mode in the WiMAX system, which are detailed in the IEEE 802.16e sleep and idle mode, and its

We proposed a efficient sector power control based on distance between base station and mobile node. Also we proposed a sleep mode energy control mechanism. In sleep mode energy saving protocol, each sector monitors the number of user in sector