Scheduling with QoS provisioning in Mobile Broadband Wireless Systems

We propose a Dynamic Hybrid Scheduler (DHS) for Mobile Broadband Wireless Systems composed by two basic components, corresponding to a guaranteed and a dynamic delay based rate allocation policy respectively. The proposed scheduler is balanced between these two scheduling disciplines and thus combines their merits in an effective manner. Furthermore, a delay bound is obtained for each service under the assumptions of (a) reliable channel conditions and (b) employment of the least power demanding coding and modulation scheme. DHS is applicable to various Mobile Broadband Wireless Systems such as HSPA, 1xEVDO and Mobile WiMAX and its performance is evaluated through event driven simulation and compared against another delay driven scheduler namely Feasible Earliest Due Date (FEDD) a variation of classic EDD modified for wireless systems.