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Dynamic Resource Allocation for Asynchronous Uplink OFDMA systems (DRUS)

异步上行链路 OFDMA 系统 (DRUS) 的动态资源分配

基本信息

批准号：
161593349
负责人：
Professor Dr.-Ing. Adam Wolisz
金额：
--
依托单位：
Fachgebiet Telekommunikationsnetze (TKN)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/161593349?language=en
关键词：
Dynamic Resource Allocation Asynchronous Uplink

项目摘要

Dynamic guard band assignment and resource allocation has been shown to be beneficial for multiple access interference (MAI) mitigation and performance improvement in orthogonal frequency division multiple access (OFDMA) systems compared to mere usage of guard intervals. However the conclusion is based on the assumption that user terminals (UTs) work in a single cell with similar traffic profile. However one can legitimately question the performance of this method in a multicell environment and under different traffic models and application requirement. We address the problem under new assumptions to examine the idea in more realistic situations. The problem of dynamic resource allocation and guard band assignments is considered for traffic aware and multicell scenarios. Firstly, the packet traffic awareness is considered by taking into account different traffic models and also different performance metrics beyond the throughput. The new metrics depend on the application in use and is defined using utility curves. Secondly, the model is extended from single-cell to multicell scenario, where MAI can be also caused by UTs from neighbor cells. It is discussed how the MAI can be reduced with or without cooperation between different cells. We will evaluate the performance of the system after taking these assumptions into account and we discuss different pros and cons of dynamic resource allocation methods.

与仅仅使用保护间隔相比，动态保护频带分配和资源分配已经被证明对于正交频分多址（OFDMA）系统中的多址干扰（MAI）减轻和性能改善是有益的。然而，该结论是基于用户终端（UT）工作在具有类似业务简档的单个小区中的假设。然而，人们可以合理地质疑这种方法在多小区环境中的性能，并在不同的流量模型和应用需求。我们在新的假设下解决这个问题，以在更现实的情况下检验这个想法。动态资源分配和保护频带分配的问题被认为是业务感知和多小区的情况。首先，考虑到不同的流量模型和不同的性能指标以外的吞吐量的数据包流量感知。新的指标取决于使用中的应用程序，并使用效用曲线定义。其次，该模型从单小区扩展到多小区场景，其中MAI也可以由来自相邻小区的UT引起。它讨论了如何MAI可以减少或没有不同的细胞之间的合作。我们将评估系统的性能后，考虑到这些假设，我们讨论了不同的优点和缺点的动态资源分配方法。