跨层资源调度算法综述

Tutorial on Cross-layer Resource Scheduling in Wireless Networks

跨层资源调度对实现资源的有效利用,保证业务的QoS起着重要作用。本文对跨层资源调度的研究状况进行了概述:根据所采用的技术体制和约束类型,介绍了单载波系统和OFDM系统的多用户机会调度问题和相应算法,分析了单一类型和多种类型资源共享约束下的机会调度算法;分别从队列调度、子载波分配和功率控制3个方面,对基于队列和信道状态信息的资源调度算法进行了分析和比较;对提高反馈信息的准确性、减少反馈信息量的方法和机制进行了简要介绍。最后指出了需要进一步研究的问题。

Cross-layer resource scheduling is very critical to make effective use of wireless resource and guarantee QoS as well. This tutorial paper overviews recent developments in cross-layer resource scheduling and allocation prohlerns in wireless networks：opportunistic scheduling algorithms for single carrier and OFDM system under one type of QoS constraint and multiple QoS constraints are introduced respectively;The resource scheduling algorithms in terms of queue scheduling, subcarrier allocation and power control, which are both channel aware and queue aware are described in sequence.The schemes are elaborately categorized which improve the accurateness of channel knowledge and decrease the amount of feedback information. The problems to be further investigated are presented finally.