论文部分内容阅读
基站协作是多小区正交频分多址接入(OFDMA)系统中降低共信道干扰的有效手段。为了降低收集各小区信息所需的开销,提出一种新的基站协作资源分配算法。算法由各基站计算本小区的业务负荷及所有子信道对本小区的价值,并发送至中心节点。根据这两类信息,资源首先由中心节点分配至各小区,再由各基站分配至用户。该算法的开销仅约为现有方法的2/U(U为协作小区的总用户数)。与无基站协作的方法相比,该算法仍可获得30%以上的用户容量或吞吐量增益。结果表明:本算法兼具实用性和有效性,有望应用于新一代移动通信系统。
Base station cooperation is an effective means of reducing co-channel interference in a multi-cell orthogonal frequency division multiple access (OFDMA) system. In order to reduce the overhead required to collect the information of each cell, a new resource allocation algorithm of base station cooperation is proposed. The algorithm calculates the service load of the local cell and the value of all sub-channels to the local cell by each base station, and sends the value to the central node. According to these two types of information, resources are first allocated to cells by the central node and then allocated by the base stations to users. The cost of the algorithm is only about 2 U of the existing method (U is the total number of users in the coordinated cell). Compared with the method without base station cooperation, the algorithm can still obtain more than 30% of user capacity or throughput gain. The results show that this algorithm is practical and effective and is expected to be applied to a new generation of mobile communication system.