MU-MIMO下行链路基于加权用户相关的公平调度

doi:10.13229/j.cnki.jdxbgxb201603041

摘要/Abstract

摘要： 针对单小区MU-MIMO下行广播信道传统的公平调度算法在逐次添加用户的过程中不能准确计算用户可达速率,从而无法兼顾良好的公平性及系统和速率的问题,提出一种基于加权用户空间相关度的公平调度算法(WUCFS)。采用该方法,用户的添加基于对候选用户与已选用户以及潜在的可能被选择用户之间的相关度的综合考虑,以加权相关值最大为调度准则,能够更准确地估计用户实际传输速率,并且更公平、合理地激活一组相互之间干扰小的用户。相比于已有方法,所提算法能够在获得高的系统和速率的同时更好地保证用户之间的公平性。

关键词: 通信技术, 多用户, 多输入多输出系统, 用户相关度, 公平调度

Abstract: Traditional fair scheduling algorithms cannot accurately compute the achievable rate for each user in the process of iterative user selection, which results in non-favorable tradeoff between fairness and system sum rate. To address this problem, a fair scheduling algorithm based on weighted user-correlation (WUCFS) is proposed for MU-MIMO downlink broadcast channels. In this algorithm, users are activated based on comprehensive consideration of the correlation between candidate users and selected users as well as those to be scheduled potentially. Weighted correlation maximization is employed as scheduling criterion. The proposed algorithm could estimate the actual transmission rate of each user more precisely, and activate a set of users of small mutual interference with more fairness and appropriateness. Compared with existing schemes, the propose algorithm could achieve better fairness among users while ensuring high system sum rate.

Key words: communication technology, multiuser, MIMO system, user correlation, fairness scheduling

中图分类号:

TN929.5

李钊, 李培凤. MU-MIMO下行链路基于加权用户相关的公平调度[J]. 吉林大学学报(工学版), 2016, 46(3): 947-954.

LI Zhao, LI Pei-feng. Weighted user-correlation based fair scheduling for MU-MIMO downlink[J]. 吉林大学学报(工学版), 2016, 46(3): 947-954.

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