基于服务质量的WiMAX前向兼容LTE上行调度算法

LTE Uplink Scheduling Algorithm Based on QoS Forwards Compatibility to WiMAX

长期演进技术(LTE)可单向兼容全球微波互联接入技术(WiMAX),WiMAX到LTE的前向兼容却无法实现。为此,提出一种基于服务质量(QoS)的上行调度算法。通过为双方服务流提供多类映射规则,根据优先级对上行资源进行动态分配,满足类间不同链路的特定要求,确保同类内链路间的公平性。仿真结果表明,与经典的轮询算法相比,该算法在吞吐量和QoS方面有明显的优势,在超负荷情况下能够保持算法的健壮性,实现WiMAX到LTE的交互通信。

Long Term Evolution(LTE) performs one-way compatible to Worldwide Interoperability for Microwave Access(WiMAX),but the forwards compatibility from WiMAX to LTE cannot be realized.To solve the problem,an efficient uplink scheduling algorithm based on Quality of Service(QoS) is proposed.This algorithm provides elaborate mapping rules for both flows of service,and present dynamic schemes for uplink resource assignment based on priorities.It not only meets the requirements for different links,also ensure fairness among intra-class links.Simulation result shows that the algorithm has an obvious advantage in throughput and QoS comparing to a typical Round Robin(RR) algorithm,shows robustness in overload situation.The interoperability from WiMAX to LTE is successfully achieved.