Interference management for rate-constrained moving relay node in a heterogeneous network  

作　　者：HUANG Sheng LI JianDong ZHAO LinJing HUANG JinJing 

机构地区：[1]Broadband Wireless Communications Laboratory, Information Science Institute,State Key Laboratory of ISN, Xidian University

出　　处：《Science China(Information Sciences)》2014年第10期30-41,共12页中国科学（信息科学）（英文版）

基　　金：supported in part by Key Project of National Natural Science Foundation of China(GrantNo.61231008);National Basic Research Program of China(Grant No.2009CB320404);National NaturalScience Foundation of China(Grant No.60902032);National Science and Technology Major Specific Projectof China(Grant No.2010ZX03005-003);Fundamental Research Funds for the Central Universities(Grant No.K50511010008);111 Project(Grant No.B08038)

摘　　要：Cooperative communication via a moving relay node （MRN） helps resolve both the poor quality of service （QoS） and limited battery-capacity problems of cell-edge vehicle user equipment （VUE）. This paper investigates the performance of MRNs in a heterogeneous network （HetNet）. MRNs as well as other small cells are expected to coexist in a complex manner. In such a HetNet, the inter-cell interference may degrade the expected improvement of MRNs, especially at the cell-edge. In this paper, we investigate the impact of intercell interference on the performance of MRNs. To alleviate this impact, we first formulated a general optimization problem for which it is intractable to find a global optimal solution. To have a practical solution with low computational complexity, we used a practical interference management algorithm that aimed to ensure that every MRN achieved its required minimum-rate while maximizing total network throughput. In the simulations, the proposed algorithm was observed to improve both the QoS and fairness of MRNs. Numerical results demonstrate that the proposed algorithm can offer an efficient trade-off between the performance of both the victim MRNs and aggressing femtocells.Cooperative communication via a moving relay node （MRN） helps resolve both the poor quality of service （QoS） and limited battery-capacity problems of cell-edge vehicle user equipment （VUE）. This paper investigates the performance of MRNs in a heterogeneous network （HetNet）. MRNs as well as other small cells are expected to coexist in a complex manner. In such a HetNet, the inter-cell interference may degrade the expected improvement of MRNs, especially at the cell-edge. In this paper, we investigate the impact of intercell interference on the performance of MRNs. To alleviate this impact, we first formulated a general optimization problem for which it is intractable to find a global optimal solution. To have a practical solution with low computational complexity, we used a practical interference management algorithm that aimed to ensure that every MRN achieved its required minimum-rate while maximizing total network throughput. In the simulations, the proposed algorithm was observed to improve both the QoS and fairness of MRNs. Numerical results demonstrate that the proposed algorithm can offer an efficient trade-off between the performance of both the victim MRNs and aggressing femtocells.

关 键 词：moving relay node minimum-rate constraint heterogeneous network inter-cell interference sub-channel allocation interference mitigation 

分 类 号：TN929.5[电子电信—通信与信息系统]