摘要： 在蜂窝网络中引入设备与设备(D2D)通信可解决频谱资源匮乏的问题,但移动多媒体业务的多样化使用户带宽需求日益增长。为此,在比例公平调度算法的基础上设计启发式D2D资源分配方案。根据D2D对优先级从高到低的顺序逐一调度,同时禁止已满足数据速率需求的D2D对与其他D2D对竞争资源块,保证信道状态较差的D2D对获得被调度机会。当所有D2D对的数据速率需求都被满足时,调整用户优先级,在最大化系统吞吐量与保证用户被调度的公平性之间进行折中。仿真结果表明,该方案可以保证D2D通信对数据速率的需求,提升系统吞吐量,同时兼顾用户被调度的公平性。

关键词: 蜂窝用户, 设备与设备通信, 数据速率需求, 比例公平, 资源分配

Abstract: Device-to-Device(D2D) communication is an effective technique to solve the shortage of spectrum resources in cellular networks.With the increasing diversification of mobile multi-media services,users need more bandwidth.Aiming at this problem,this paper proposes a heuristic D2D resource allocation scheme based on Proportional Fairness(PF) scheduling algorithm.According to the D2D pairs’ priority in descending order,it allocates resources for D2D pairs one by one.Simultaneously,to ensure that D2D pairs with poor channel state can be scheduled,D2D pairs whose data rate requirements are satisfied are prohibited to reuse Resource Block(RB).When all D2D pairs’ data rate requirements are satisfied,users’ priority will be readjusted to improve the system throughput as much as possible.Simulation results show that the proposed scheme can guarantee the data rate requirements of D2D pairs and improve the throughput of the system while taking into account fairness between different D2D pairs.

Key words: cellular user, Device-to-Device(D2D) communication, data rate requirement, Proportional Fairness(PF), resource allocation

中图分类号: 

• TN929.5