LTE-A系统中基于资源利用率的时延优先调度算法

Resource utilization based delay prioritized scheduler algorithm in LTE-A system

针对现有LTE系统中调度算法在吞吐量、公平性及丢包率性能指标上难以取得性能平衡的问题,提出一种改进算法,在考虑用户时延的前提下还考虑了用户对资源块(RB)的利用率,从实际获得速率的角度来更精确描述用户对资源的利用能力,更加合理地分配资源.仿真结果表明,该算法的丢包率性能有很大改进,同时在吞吐量、公平性方面也有着较好表现,实现了良好的综合性能,能够更好地满足用户的QoS需求.

To overcome the difficulty of reaching a balance of throughput, fairness and packet loss of current LTE scheduling algorithms, an enhanced algorithm is proposed. We take the Resource Block （RB） utilization into consideration on the premise of considering user delay, and hence can describe the resource utilization efficiency of users more precisely, which causes the resource is allocated more properly. Simulation results demonstrate that the algorithm has a great improvement on packet loss rate, and at the same time, it performs better in terms of throughput and fairness. It shows an exeeUent comprehensive performance and can better satisfy the requirements of users＇ Quality of Service （QoS）.