基于ABS的干扰协调方案研究

发布时间：2018-06-21 11:17

本文选题：异构网 + 干扰协调　；参考：《南京邮电大学》2017年硕士论文

【摘要】：异构网通过运用不同功率的基站同频部署,扩大了网络覆盖率及系统容量。但同时这种多层结构也带来了小区间干扰问题。ABS是一种时域上的小区间干扰协调技术,解决了下行传输中高功率宏基站和低功率小基站共享频域资源时的干扰问题,但是该技术的缺点是降低了宏基站的用户容量。目前对于该问题大部分的解决思路是从改善ABS数量配置的角度出发,而很少有研究提升ABS方案本身。论文首先介绍了小区间干扰协调的相关技术。对小区间干扰协调面临的问题,现有的解决方案及技术进行了介绍,包括一种基于经典ABS的动态算法,LP-ABS技术及比例公平算法。然后论文研究介绍了一种从频域、时域、功率三个维度联合进行干扰协调的新型ABS解决方案。论文用仿真证明该方案可以显著增加了宏基站用户的吞吐量,同时不对小基站产生过多干扰。本文的工作重点是对新型联合协调方案的进一步增强。通过对算法的改进及各个参数的优化,在频域上对扩展区域UE的保留资源分配,并对宏基站在ABS子帧上的传输功率进行限制,在保证了宏基站用户吞吐量增强的同时,使小基站抗干扰的表现更为优秀。通过仿真证明,增强型联合ABS方案与LP-ABS及新型联合方案相比可以实现更高的宏基站用户容量增益,同时使小基站用户获得不错的抗干扰能力。
[Abstract]:The heterogeneous network expands the network coverage and system capacity by using the same frequency deployment of different power base stations. But at the same time, this multi-layer structure also brings the inter-cell interference problem. ABS is a kind of inter-cell interference coordination technology in time domain, which solves the interference problem when high power macro base station and low power small base station share frequency domain resources in downlink transmission. But the disadvantage of this technology is that it reduces the user capacity of Acer station. At present, most of the solutions to this problem are from the point of view of improving the number of ABS, but there are few studies to improve the ABS scheme itself. In this paper, we first introduce the technology of inter-cell interference coordination. In this paper, the existing solutions and techniques for inter-cell interference coordination are introduced, including a dynamic algorithm based on classical ABS, LP-ABS technology and proportional fairness algorithm. Then, this paper introduces a new ABS solution for interference coordination in frequency domain, time domain and power dimension. Simulation results show that the proposed scheme can significantly increase the throughput of Acer stations and not cause too much interference to small base stations. The emphasis of this paper is on the further enhancement of the new joint coordination program. Through the improvement of the algorithm and the optimization of each parameter, the reserved resource allocation of the extended region UE in the frequency domain and the limitation of the transmission power of the Acer station on the ABS subframe can ensure the user throughput of the Acer station to increase at the same time. Make small base station anti-jamming performance better. The simulation results show that the enhanced joint ABS scheme can achieve higher user capacity gain than LP-ABS and the new combination scheme, and at the same time, the small base station users can obtain good anti-jamming ability.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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