LTE-Advanced中继系统频谱分配方法研究
首发时间:2010-03-03
摘要:为了满足未来移动通信系统日益增加的高速数据业务需求,LTE-Advanced系统对小区的平均吞吐量和小区边缘用户的数据速率提出了更高的要求。无线中继(Relay)作为一种低功率、低成本的网络节点被引入到LTE-Advanced系统中,具有拓扑灵活的优点,能够有效提高系统频谱效率、拓展网络覆盖。在引入Relay的通信系统中系统中,根据不同的优化目标,可以采取不同的频谱分配方案, 从而达到改善系统的覆盖或提高系统的频谱利用效率的目的。本文第二章提出了Relay在提高系统容量和扩展边缘覆盖时的资源分配方法;第三章和第四章给出了3GPP Case 1和Case 3场景下[1],Relay接入链路根据不同目的,采用不同的资源分配方式下系统平均频谱效率和边缘用户频谱效率的仿真结果。
关键词: LTE-Advanced Relay 接入链路 资源分配 吞吐量 覆盖扩展
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The research of resource assignment algorithms in LTE-Advanced relay system
Abstract:In order to fulfill the requirement of high data rate wireless services in the future wireless communication system, LTE-Advanced systems need to provide higher performance in terms of both average cell throughput and cell edge user throughput. Wireless Relay,as a lower-power and lower-cost network node, has been introduced into the LTE-Advanced systems. It offers more flexible deployment options and it can effectively improve spectral efficiency as well as coverage. In such systems, different spectrum assignment schemes can be made according to different optimal targets, which result in coverage extension or, alternatively, capacity improvement. In this paper, chapter 2 proposes resource assigning methods of relay with the respect of increasing system throughput and extending edge coverage. In chapter 3 and 4, system level simulations are carried out in scene 3GPP Case 1 and Case 3 to evaluate the affections of resource assignment algorithms in access link in capacity and coverage.
Keywords: LTE-Advanced Relay access-link resource assignment throughput
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