An efficient hybrid downlink BS scheduler for WiMAX network

WiMAX, IEEE 802.16 is a wireless telecommunication technology, which supports broadband products to offer high speed internet access to the users with always on connectivity, covering more range and mobility features as compared to other broadband technologies like Wi-Fi. It provides high quality services by making the classes of services as real time and non-real time and attached a scheduling flow with each class of application to satisfy their QOS (Quality of service) parameters like latency, jitter, throughput, etc. The scheduling algorithms for supporting this QOS in literature, works in high to low priority order which may cause users with low priority to suffer large waiting time and are sometimes dropped from the queue due to crossing latency limits. The paper focus on this perspective and proposed a downlink BS scheduler for WiMAX heterogeneous data in which, it modified the existing Greedy Latency algorithm, used distance deduction scheme and hybrid with SJF scheduler. The simulation results carried out in MATLAB shows that the proposed technique has less processing time or latency, low packet loss rate and high throughput in comparison to existing scheduling algorithms.