Adaptive Soft Frequency Reuse Scheme for In-building Dense Femtocell Networks

作     者：陈继明 王鹏 张杰 

作者机构：Ranplan Wireless Network Design Ltd. Centre for Wireless Network Design University of Bedfordshire The Communications Group University of Sheffield 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2013年第10卷第1期

页      面：44-55页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the EU-FP7 iPLAN under Grant No.230745 EU-FP7 IAPP@RANPLAN under Grant No.218309 

主　　题：in-building femtocell networks soft frequency reuse adaptive interferencecoordination 

摘      要：Femtocell networks have emerged as a key technology in residential, office building or hotspot deployments that can sig- nificantly fulfill high data demands in order to offioad indoor traffic from outdoor macro cells. However, as one of the major challenges, inter-femtocell interference gets worse in 3D in-building scenarios because of the presence of numerous interfering sources and then needs to be considered in the early network planning phase. The indoor network planning and optimization tool suite, Ranplan Small- cell~, makes accurate prediction of indoor wireless RF signal propagation possible to guide actual indoor femtocell deployments. In this paper, a new adaptive soft frequency reuse scheme in the dense femtocell networks is proposed, where multiple dense femtocells are classified into a number of groups according to the dominant interference strength to others, then the minimum subchannels with different frequency reuse factors for these groups are determined and transmit powers of the group- ing sub-channels are adaptively adjusted based on the strength to mitigate the mutual inter- ference. Simulation results show the proposed scheme yields great performance gains in terms of the spectrum efficiency relative to the legacy soft frequency reuse and universal fre- quency reuse.