一种OFDMA系统半静态干扰协调算法

A Semi-static Interference Coordination Algorithm of OFDMA Systems

为了解决多小区OFDMA系统边缘用户受到严重的同频干扰问题,提出了一种基于小区边缘用户数的半静态干扰协调算法SICUN。该算法用小区边缘用户数指示小区边缘业务量的大小,结合特定的频率资源优先级规划方案以确定系统中小区中心、边缘用户的可用频率资源,在此基础上进行了补偿式功率控制。仿真结果表明:SICUN能在保证小区边缘用户性能的前提下,较大地提高系统整体性能。

In order to solve the severe Co-Channel Interference （CCI） problem suffered by cell-edge users in multi-cell OFDMA system, a semi-static interference coordination algorithm based on cell-edge users number （SICUN） was proposed. By using cell-edge users number as the indicator of cell-edge traffic load and introducing a novel frequency resource priority scheme, the proposed algorithm figured out the available frequency resource utilized by cell-inner users and cell-edge users ,and furthermore integrated with a compensatory power control scheme. The simulation results show that SICUN can improve system throughput effectively while guarantee cell-edge users performance.