A QoE-based cell range expansion scheme in heterogeneous cellular networks  

作　　者：YUAN TingTing FEI Ze Song LI Na WANG Ni Wei XING Cheng Wen LIU Jia Kang 

机构地区：[1]School of Information Science and Engineering,Beijing Institute of Technology [2]The Research Institution of China Mobile

出　　处：《Science China(Information Sciences)》2015年第8期152-162,共11页中国科学（信息科学）（英文版）

基　　金：supported by China National S&T Major Project(Grant No.2013ZX03003002-003);National High-tech R&D Program of China(863 Program)(Grant No.2014AA01A701);‘111’Project of China(Grant No.B14010)

摘　　要：Deploying low-power nodes （LPNs） overlaid with Macro cells is a promising strategy to improve the coverage and capacity of cellular systems. Meanwhile, cell range expansion （CRE） scheme is proposed to select a proper serving base station （BS） for users between Macro eNodeBs and LFNs, and then offloading of traffic from Macro cell is made. In this paper, first, we introduce the LPNs deployment strategy and its activation criteria in the heterogeneous system. Then, a quality of experience （QoE）-based CRE scheme to adjust the coverage area of LPNs adaptively is proposed. Different from the existing CRE schemes, the QoE values for different users with different services are considered when the users try to select an appropriate serving BS. Finally, simulation results demonstrate that the proposed scheme can improve cell edge user experience for various services as well as overall system performance.Deploying low-power nodes （LPNs） overlaid with Macro cells is a promising strategy to improve the coverage and capacity of cellular systems. Meanwhile, cell range expansion （CRE） scheme is proposed to select a proper serving base station （BS） for users between Macro eNodeBs and LFNs, and then offloading of traffic from Macro cell is made. In this paper, first, we introduce the LPNs deployment strategy and its activation criteria in the heterogeneous system. Then, a quality of experience （QoE）-based CRE scheme to adjust the coverage area of LPNs adaptively is proposed. Different from the existing CRE schemes, the QoE values for different users with different services are considered when the users try to select an appropriate serving BS. Finally, simulation results demonstrate that the proposed scheme can improve cell edge user experience for various services as well as overall system performance.

关 键 词：low power nodes heterogeneous networks cell range expansion quality of experience LTE-ADVANCED 

分 类 号：TN929.5[电子电信—通信与信息系统]