摘要： 针对异构蜂窝网络的小区间干扰协调管理方案不能同时满足干扰源网络和受干扰网络的带宽速率及服务质量(QoS)需求的问题,根据异构蜂窝网络的特点以及无线通信机制,提出一种动态增强型小区间干扰协调方案。由当前网络的负载情况求出最佳的低功率几乎空白子帧(LP-ABS)比率。通过小区范围扩展区域用户的整体干扰情况,求出宏基站在LP-ABS状态下的最佳传输功率,作用于宏基站的发射功率。采用用户可容忍宏基站的最大干扰值,决定是否将LP-ABS比例优化应用于下一次调度周期。实验结果表明,在保证系统整体吞吐量下降较少的基础上,该方案能有效保证整个网络用户的速率和QoS需求,解决过高的ABS比例导致干扰源用户性能过低的问题,从多个角度提高通信网络的整体性能。

关键词: 异构蜂窝网络, 增强型小区间干扰协调管理, 低功率几乎空白子帧协调, 小区范围扩展, 比例配置优化

Abstract: Inter-cell interference coordination management scheme cannot satisfy the bandwidth rate and Quality of Service(QoS) requirement of interference source and interference network in heterogeneous cellular network.Aiming at the characteristics of heterogeneous cellular network and wireless communication mechanism,a dynamic enhanced inter-cell interference coordination scheme is proposed.According to the actual situation of the current network load,the optimal ratio of Lower Power-Almost Blank Subframe(LP-ABS) can be determined.The global interference situation of area users is extended through the residential area,and the optimal transmission power of the macro base station in the LP-ABS state is obtained,which is used in transmit power of macro base station.The maximum interference value of user tolerant macro base station is used to decide whether to perform LP-ABS ratio optimization or not to the next scheduling cycle.Experimental results show that on the basis of ensuring the overall throughput of the system is not too large,the proposed scheme can effectively guarantee the rate of the entire network users and QoS need,solve the problem that the high proportion of ABS leads to low performance for the user of interference source network,and improve overall communication network performance from multiple angles.

Key words: heterogeneous cellar network, enhanced inter-cell interference coordination management, Lower Power-Almost Blank Subframe(LP-ABS) coordination, cell range extension, ratio allocation optimization

中图分类号: 

• TP393