TDD-CDMA系统中支持非对称业务的动态信道分配算法研究
A Novel Dynamic Channel Allocation Scheme to Support Asymmetrical Services in TDD-CDMA Systems
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摘要: 在TDDCDMA系统中由于对上下行不对称业务的需求，使得不同小区间的上下行切换点不同，因此会产生严重的小区间干扰(基站和基站间干扰)，需要使用动态信道分配算法(DCA)。该文提出了一种新算法(基于路径损耗的抗基站间干扰DCA)，它通过路径损耗进行资源预留，同时通过尽量避免基站问的相互干扰机制来最大化提高系统容量。仿真结果表明提出的DCA能够显著改善非对称业务下系统的性能。Abstract: In TDD-CDMA system, the different asymmetrical requirements between uplink (UL) and downlink (DL) in different Base Station (BS) and different time will generate serious inter-cell interference. From the interference point of view, Dynamic Channel Allocation (DCA) is treated mandatorily on TDD-CDMA systems. In this paper, a novel and advanced DCA algorithm is presented, which is based on radio resource reserving related to pathloss assistance and BS-BS interference resolving mechanisms. Simulation results show the novel DCA can work better than the traditional DCA schemes for asymmetrical traffic.
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