LTE系统中多类别业务的调度算法研究

Research on Scheduling Algorithms in Multi-class Traffic of LTE System

本文针对目前算法处理多类别业务时低优先级业务带宽不足,影响整体服务质量(Quality of Service,QoS)的问题,提出用于多类别业务的新的调度算法,包括用于eNodeB的多类别业务调度算法和用于UE的多类别业务优先级调整算法。通过本文算法,能保证紧急要求的UE总是被优先调度,能够最大化MAC层吞吐量,同时能满足最小QoS约束,并进一步改善低优先级业务的资源不足的问题。实验表明本文算法能显著改善LTE上行链路性能。

LTE,or Long Term Evolution,is 4 G wireless technology.Aiming at the problem that the bandwidth of low priority traffic is insufficient and the overall QoS is affected when multi-class traffic is processed,a new scheduling algorithm for multi-class traffic is proposed,including multi-class traffic scheduling algorithm for eNodeB and multi-class traffic priority adjustment algorithm for UE.The result that emergency UE is always scheduled first can be ensured through the algorithm,the algorithm can also maximize MAC throughput,meanwhile can satisfy the minimum QoS constraints.It can also improve the problem that the bandwidth of low priority traffic is insufficient.The experimental results show that the proposed algorithm can significantly improve LTE uplink performance.