面向业务服务质量的中继系统资源分配算法

Quality of service oriented resource allocation algorithm in relay system

为了提高正交频分复用中继系统下行链路的吞吐量,满足用户对服务质量的需求,基于比例公平算法给出一种面向业务服务质量的资源分配算法。先根据用户在队列中的等待时延和用户对速率的需求,设计出时延因子和速率因子,并以此在时域阶段计算出不同用户优先级,最后在频域阶段根据用户的优先级分配资源。仿真结果表明,与原比例公平算法相比较,新算法吞吐量可提升35%到50%,用户公平性指数可提高13%,用户满意度也有增加。

In order to improve the throughput of orthogonal frequency division multiplexing relay downlink system, and to meet user demands for quality of service, a Quality of Service oriented resource allocation algorithm is proposed based on the proportional fair algorithm. Based on the proportional fair algorithm and according to the user waiting delay in the queue and user demands for speed, this algorithm is used to design the delay factor and speed factor, then to calculate the priority of different user in the time domain, and finally to allocate resources based on the user priority in the frequency domain. Simulation results show that compared to the proportional fair algorithm, the throughput of this algorithm can be improved from 35 % to 50 %, the user fairness index can be increased by 13%, and user satisfaction can also be increased.