A radio resource management framework for QoS support in multiservice WiMAX networks

Abstract

Abstract-Among enabling technologies for the fourth generation networks, WiMAX represents a valuable solution because of its ability to provide wideband coverage and differentiated treatment to traffic with heterogeneous Quality of Service (QoS) requirements. This paper focuses on the design of a channeladaptive QoS-supporting framework for radio resource management in WiMAX networks with fixed subscriber stations. The base station generates resource grants on the basis of (i) flowbased bandwidth requests, (ii) monitored link conditions to each subscriber station, and (iii) minimum resource requirements by high-demanding flows. A compensation technique that mitigates the negative effects caused by impairments on the radio channel is also presented. The effectiveness of the proposed solution in supporting both inter-class traffic QoS differentiation and intraclass fairness is demonstrated through simulations.