LTE系统上行调度算法研究

无线资源调度是LTE系统研究的一个热点问题。LTE上行链路采用了单载波正交频多址(SC-FDMA)技术,要求在调度时为任一用户分配的RB必须是连续的,使得LTE下行调度算法不能直接应用上行调度。本文对LTE系统上行链路资源调度问题的研究状况进行了概述,分别从信道感知、比例公平、QoS保证三个方面,对现有调度算法进行了分析和比较。重点分析比较了各个算法在保证分配的RB连续的前提下系统性能,并提出了进一步研究的方向。

Wireless resource scheduling has been a hot issue of research in LTE, Due to LTE uses Single Carrier Frequency Division Multiple Access（SCFDMA）as the uplink transmission scheme, resource assigned to the same user equipment （UE） must be contiguous for the uplink, so scheduling algorithms in LTE downlink can＇t be used for the uplink directly. In this paper, we overviewed recent developments in scheduling algorithms and allocation problems in LTE system, and evaluated the performance of some LTE uplink scheduling algorithms for channel-aware, Proportional Fair, and QoS guaranteed. This was emphases that we analysed the performance of these algorithms on the promise that resource assigned to the same user UE must be contiguous, furthermore the problems to be further investigated were presented.