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研究了两跳固定中继蜂窝网的频率规划问题。与其他固定中继蜂窝网的研究不同,假设了固定中继节点与其所属基站链路上没有任何性能增强技术,并在此假设条件下,根据复用分割原则,提出了两种新的中继频率规划方案。同时将提出的频率规划方案与基于信道借用的频率规划方案及传统无中继的频率规划方案进行了比较。理论分析和仿真结果表明,所提出的频率规划方案不但能提高小区边缘用户的服务质量,且与基于信道借用的频率规划方案相比,能够获得更大的系统性能提高。研究结果还表明,为了充分发挥固定中继网络的潜力,有必要在固定中继节点与其所属基站链路上引入性能增强技术。
The frequency planning problem of two-hop fixed relay cellular network is studied. Different from the studies of other fixed trunked cellular networks, it is assumed that there is no performance enhancement technology on the link between the fixed relay node and the base station to which it belongs. Under this assumption, two new trunks are proposed according to the principle of multiplexing and splitting Frequency planning program. At the same time, the proposed frequency planning scheme is compared with the channel-based frequency planning scheme and the traditional relayless frequency planning scheme. The theoretical analysis and simulation results show that the proposed frequency planning scheme can not only improve the service quality of cell-edge users, but also achieve greater system performance improvement compared with channel-based frequency planning schemes. The results also show that in order to give full play to the potential of fixed trunking networks, it is necessary to introduce performance enhancing techniques on the links between the fixed relay nodes and the base station to which they belong.