无线通信系统用户公平调度算法研究

发布时间：2018-01-16 22:26

本文关键词：无线通信系统用户公平调度算法研究　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着科技的进步,人们对于信息的各方面需求变得越来越多且越来越高,无线通信技术是满足这些需求的有效手段,且无线通信具有移动方便、组网灵活、覆盖和扩展性良好等特点。随着多媒体业务、因特网服务和电子商务等在无线通信领域的广泛应用,人们对通信速率和服务质量的要求不断提高,然而无线资源是有限的,因此如何合理地设计调度机制,改善无线通信系统的性能和提高频谱效率成为研究的热点。本文研究能够保证用户公平性的调度算法设计。分别在多用户MIMO以及协作通信系统中设计相应的调度算法。论文首先研究了多用户MIMO下行链路中的用户公平调度,针对单小区MU-MIMO下行广播通信系统中,传统的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和系统和速率的问题,提出一种基于加权用户空间相关度的公平调度算法。该方法在用户添加过程中综合考虑候选用户与已选用户以及潜在的可能被选择的用户之间的相关度,以加权相关值最大为准则进行用户调度,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。此外,论文对协作中继系统下行链路用户公平性调度问题进行研究。在协作中继下行链路通信系统中,提出一种基于动态中继激励的公平调度机制,对目的用户和中继节点进行联合公平调度,并对协助其它用户数据传输的移动节点给予合理的资源补偿。通过将中继节点对目的用户的数据协作贡献进行量化,基于该参数和节点的剩余能量信息进行调度权重的计算,实现对中继节点调度机会的动态补偿。
[Abstract]:With the development of science and technology, the demand for all aspects of information becomes more and more and higher. Wireless communication technology is an effective means to meet these needs, and wireless communication is mobile and flexible. With the wide application of multimedia services, Internet services and e-commerce in wireless communication field, the requirements of communication rate and quality of service are increasing. However, the wireless resources are limited, so how to design a reasonable scheduling mechanism. Improving the performance of wireless communication system and improving spectrum efficiency have become the focus of the research. This paper studies the scheduling algorithm design which can guarantee the fairness of users, and designs the corresponding scheduling algorithm in multi-user MIMO and cooperative communication system, respectively. This paper first studies the fair scheduling of users in multiuser MIMO downlink. In single cell MU-MIMO downlink broadcast communication system, the traditional scheduling algorithm can not accurately calculate the user reachable rate in the process of adding users one by one. Therefore, it is impossible to take into account the good fairness and the problem of system and rate. A fair scheduling algorithm based on weighted user space correlation is proposed, which considers the correlation between candidate user, selected user and potential potential user in the process of user addition. With the maximum correlation value as the criterion, the user scheduling can estimate the actual transmission rate more accurately, and more fairly and reasonably activate a group of users with small interference. Compared with the existing methods. The proposed algorithm can obtain high system and rate while ensuring the fairness between users. In this paper, the fairness scheduling problem of downlink users in cooperative relay system is studied. In the cooperative relay downlink communication system, a fair scheduling mechanism based on dynamic relay excitation is proposed. The joint fair scheduling of the destination user and the relay node is carried out, and the reasonable resource compensation is given to the mobile node that assists other users in data transmission. The contribution of the relay node to the data cooperation of the destination user is quantified by means of quantifying the contribution of the relay node to the data cooperation of the destination user. Based on the parameter and the residual energy information of the node, the scheduling weight is calculated, and the dynamic compensation of the scheduling opportunity of the relay node is realized.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

【相似文献】