Adaptive Sleep Mode Management in IEEE 802.16m Wireless Metropolitan Area Networks
The emerging IEEE 802.16m standard provides a new sleep mode operation for Mobile Stations (MSs). It evolves from the sleep mode operation in the IEEE 802.16 standard but with more advanced features, e.g., the listening window may be extended and the sleep cycle length is adjustable. To fully exploit these advancements, the authors conduct a comprehensive analytical study on the power consumption and average packet delay under the new sleep mode operation. Then, based on the analytical results, they propose a novel adaptive sleep mode management scheme called Adaptive Sleep Mode Management (ASMM), which adjusts an MS's sleep cycle and listening window in an adaptive manner based on online monitoring and estimation of the traffic condition.