QoS保证的无线系统资源分配和调度策略

Resource Allocation and Scheduling Algorithm for Wireless Communication System with QoS Guaranteed

该文研究了无线通信系统保证用户服务质量要求(QoS)的资源分配和调度策略,从信道遍历容量角度出发分析基于RoundRobin(RR)和多用户分集/RR思想的调度策略,并提出一种性能更好的部分多用户分集调度策略。该策略将一帧分成若干子帧,子帧的大小以及当前用户集合由无线资源分配算法根据用户的速率要求确定,调度机在每个时刻将各子帧分配给当前用户集合中信道增益最好的用户。仿真结果表明,相比于RR调度和多用户分集/RR调度,部分多用户分集调度能够减少信道占用率并且提高平均信道容量。

Providing Quality of Service （QoS） in wireless communication system is studied in this paper. First, the Round Robin （RR） scheduler and the joint K＆H/RR scheduler are analyzed by employing the crgodic capacity of fading channel. Then, a novel Partial Multiuser Diversity Scheduler （PMDS） is proposed. A frame is initially divided into several subframes whose size and current users are determined by the bit rate requirement of each user in the resource allocation module. Each subframe is then assigrmd to the user with the largest channel gain among its current users in the scheduler. Simulation results show that the proposed PMDS takes fewer channel usage and has a higher channel capacity than both the RR scheduler and joint K＆H/RR scheduler.