802.16e系统中一种针对多用户实时业务的改进休眠算法

An Enhanced Sleep Mode Management Scheme for Multiple Users with Real-time Services in 802.16e

在802.16e系统中,当具有实时业务的多个移动站点(MS)同时进入休眠模式时,重叠的侦听窗口上数据调度的竞争将会影响MS的节能效率。该文对这种实时业务下多MS同时进入休眠模式的场景进行分析,提出了一种改进的休眠算法。该算法通过调整新加入连接休眠模式的启动时间,使得各MS的侦听窗口尽量分散,实现系统负载在OFDM帧上较为均匀的分布,从而提高网络的平均节能效果。仿真结果表明所提出算法不仅能够提高系统平均的节能效率,还能够降低系统的信令开销,同时在整体上提高系统的QoS保障。

In the 802.16e system, when multiple Mobile Stations （MS） with real-time services enter sleep mode, the efficiency of power saving is impacted by the competition of the data scheduling in the overlapping listening windows. This paper analyzes the impaction and proposes an enhanced sleep mode management scheme. The proposed scheme tries to make the listening windows of different MS lie dispersedly and balance the system load among OFDM frames by adjusting the start time of sleep mode of the new connection. The simulation result shows the proposed scheme not only improves the energy efficiency but also decreases the signaling overhead as well as improves the QoS of the network.