WiMAX, Worldwide Interoperability for Microwave Access, is a developing wireless communication scheme that can provide broadband access to large-scale coverage. WiMAX belongs to the family of standards of IEEE-802.16. To satisfy user demands and support a new set of real time services and applications, a realistic and dynamic resource allocation algorithm is mandatory. One of the most efficient algorithm is EDF (earliest deadline first). But the problem is that when the difference between deadlines is large enough, then lower priority queues have to starve. So in this paper, we present a heuristic earliest deadline first (H-EDF) approach of the uplink scheduler of the WiMAX real time system. This H-EDF presents a way for efficient allocation of the bandwidth for uplink, so that bandwidth utilization is proper and appropriate fairness is provided to the system. We use Opnet simulator for implementing the WiMAX network, which uses this H-EDF scheduling algorithm. We will analysis the performance of the H-EDF algorithm in consideration with throughput as well as involvement of delay.
翻译:WiMAX(全球微波接入互连互通)是一个发展中的无线通信计划,可以提供宽带接入大规模覆盖。WiMAX(WiMAX)属于IEEE-802.16号标准家庭。为满足用户的需求和支持一套新的实时服务和应用,必须采用现实和动态的资源分配算法。最有效的算法之一是EDF(最早期的最后期限第一)。但是问题在于当最后期限差异足够大时,那么更低的优先排队必须断绝。因此,在本文件中,我们首先提出了WiMAX实时时间系统上链路调度器(H-EDF)的超速最早期限(H-EDF)方法。H-EDF为高效分配连接带宽提供了一条途径,从而向系统提供了适当和适当的公平利用带宽的机会。我们使用Opnet模拟器来实施WimaX网络,这个网络使用H-EDF的排程算法。我们将分析H-EDF算法的绩效,同时考虑吞吐和延延延。