An enhanced QOS provisioning for Wimax using channel aware Cross layer scheduler

Abstract

IEEE 802 16 is a series of wireless broadband standards authored newlineby the Institute of Electrical and Electronics Engineers IEEE The 80216 newlinefamily of standards is officially called wireless Metropolitan Area Networks newline MAN in IEEE and it has been commercialized under the name of WiMAX newline Worldwide Interoperability for Microwave Access newlineThe WiMAX multiservice environment is complex since it needs to newlineserve various packet streams and its different Quality of Service QoS newlinerequirements and traffic behaviors The packet schedulers operating at the newlineMedium Access Control MAC layer are very important for QoS delivery of newlineservice classes The WiMAX standard does not define any standard newlinescheduling algorithm for QoS improvement of its service classes in both the newlineuplink and downlink communications Each of the defined service classes newlinerequires a distinct level of QoS A single algorithm is not sufficient for all newlineservice classes An appropriate algorithm for each service class is a major newlinechallenge in WiMAX networks newline newline