An Integrated Power Saving Scheduling Algorithm in 802.16e Wireless Metropolitan Area Networks

摘要

In IEEE 802.16e, with the popularization of multimedia services, multicast and unicast services are coexisted in one mobile subscriber station (MSS). The mobile devices are generally powered by energy-limited battery. Thus, the power saving is the important issue of extending the lifetime of MSSs. In this paper we have proposed a Multicast Services Based Scheduling (MSBS) algorithm that improves energy efficiency for both unicast and multicast services, and conforms QoS requirements of MSSs in IEEE 802.16e wireless networks. MSBS schedules packets based on a deadline for each packet determined from QoS parameters and reduces energy consumption of MSSs by minimizing the switching energy. Simulation results show that, MSBS can reduce significant overall energy and prolong lifetime of the MSSs.