A QoS Guaranteed Energy-Efficient Scheduling for IEEE 802.16e

Recently, the IEEE 802.16 standard (IEEE Std 802.16-2004, 2004), a solution to broadband wireless access commonly known as Worldwide Interoperability for Microwave Access (WiMAX), has been considered as a promising standard for next generation broadband wireless access networks. IEEE 802.16e (IEEE Std 802.16e-2005, 2005), also called Mobile WiMAX (Li et al., 2007), provides enhancements to IEEE 802.16 to support the mobility of Mobile Subscriber Stations (MSSs) at vehicular speed. Like other wireless systems, conserving energy is one of the critical issues for MSSs in IEEE 802.16e. Therefore, it is required for the protocol to offer a well-designed energy-efficient algorithm for an MSS.