一种适用于多用户OFDM系统下行链路的跨层设计调度算法

马月槐; 张冬梅; 蔡跃明; 徐友云

doi:10.3724/SP.J.1146.2006.01472

一种适用于多用户OFDM系统下行链路的跨层设计调度算法

doi: 10.3724/SP.J.1146.2006.01472

马月槐^{①②;张冬梅},
张冬梅,
蔡跃明,
徐友云

基金项目:

国家自然科学基金(62672079)和江苏自然科学基金(BK2006701)资助课题

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出版历程
- 收稿日期: 2006-09-26
- 修回日期: 2007-04-11
- 刊出日期: 2008-02-19

A Cross-Layer Scheduling Algorithm for Downlink of Multi-user OFDM System

摘要

摘要: 该文提出了一种适用于多用户正交频分复用(OFDM)系统下行链路的调度算法，基于跨层结构设计，并分别考虑了媒体接入控制(MAC)层的用户服务质量(QoS)要求、用户公平性、数据包队列状态信息以及物理层的信道状态信息(CSI)和功率约束等。多用户OFDM系统可以通过该调度算法充分利用MAC层和物理层的不同参数特性，在保证用户QoS的同时最大化频谱的利用效率。仿真结果表明，在小区内各个移动用户具有不同的接收SNR的情况下，该算法具有服务质量随信噪比波动平缓、丢包率低、实现复杂度低等特点。
- 多用户OFDM系统; 队列状态信息; 跨层调度算法; QoS
Abstract: A cross-layer scheduling algorithm for downlink of multi-user OFDM system is proposed, the algorithm considers users QoS requirement, fairness, packet queue state information of MAC layer and channel state information, power constraint of physical layer. Multi-user OFDM system can make efficient use of different parameter characters of the both layers through the proposed algorithm, to achieve the goal of guarantee users QoS and maximize wireless resource utility efficiency. Simulation results show that when mobile users have different receive SNR, the proposed algorithm has steady QoS, low drop rate and low complexity.

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参考文献(1)

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