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中文摘要：
在802．16e系统中，当多个拥有实时业务的MS同时处在休眠模式时，BS的调度结果不仅决定了这些实时业务的QoS，还会影响到网络的平均节能效率．针对这个问题提出了一种新的节能数据调度算法．该算法具有两个方面的技术特点：1）通过调整新加入的MS休眠模式的启动时间，使得各MS的侦听窗口尽量分散并实现系统负载在OFDM帧上较为均匀的分布，以平滑BS调度器的输入；2）对目前广泛使用的实时业务调度算法EDF进行改进，提高处在休眠状态的MS的数据调度优先级．仿真结果表明，该算法在保证系统QoS的同时，不仅能够较大地提高了网络的平均节能效率，还降低了系统的整体信令开销．
英文摘要：
In the 802.16e system, when multiple mobile stations （MSs） with real-time services are in sleep mode, the QoS of data scheduling and the energy efficiency of sleep mode impact each other. Sleep mode will aggravate the competition of data transport of different MSs and decrease system＇s QoS, while improper data scheduling policy will interrupt the sleep mode of MS and decrease the energy efficiency. To address this problem, an energy efficient scheduling mechanism is proposed. The proposed mechanism first focuses on the sleep mode＇s impact on data scheduling. In order to smooth the input of BS scheduler, which is the data needed to transmit to the MSs, it tries to make the listening windows of different MSs lie dispersedly and do its best to balance the system load among OFDM frames. Then it considers the data scheduling＇s impact on sleep mode. In order to increase the energy efficiency, it improves the widely used EDF mechanism to avoid scheduling MS＇ data on its sleeping window by promoting the packets＇ priority of the sleeping MS. The simulation result shows that the proposed mechanism can not only improve the energy efficiency but also decrease the signaling overhead while guaranteeing the QoS of the network.
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