A Novel Resource Allocation Algorithm based on Downlink and Uplink Decouple Access Scheme in Heterogeneous Networks

查看全文 作　　者：Laiwei [1]Jiang;Xuejun [1]Sha;Xuanli [1]Wu;Naitong [1]Zhang

机构地区：[1]Communication Research Center, Harbin Institute of Technology

出　　处：《China Communications》索引2016年第13卷第6期,共10页

基　　金：supported by the National Natural Science Foundation General Program of China under Grant No.61171110;the National Basic Research Program of China under Grant No.2013CB329003 摘　　要：Traditional cellular network requires that a user equipment(UE) should associate to the same base station(BS) in both the downlink(DL) and the uplink(UL). Based on dual connectivity(DC) introduced in LTE-Advanced R12, DL/UL decouple access scheme has been proposed, which is especially suitable for heterogeneous networks(Het Nets). This paper is the pioneer to take the DL/UL decouple access scheme into consideration and develop a novel resource allocation algorithm in a two-tier Het Net to improve the total system throughput in the UL and ease the load imbalance between macro base stations(MBSs) and pico base stations(PBSs). A model is formulated as a nonlinear integer programming, and the proposed algorithm is a sub-optimal algorithm based on the graph theory. First, an undirected and weighted interference graph is obtained. Next, the users are grouped to let users with large mutual interferences to be assigned to different clusters. Then, the users in different clusters are allocated to different resource blocks(RBs) by using the Hungarian algorithm. Simulation results show that the proposed algorithm can provide great promotions for both the total system throughput and the average cell edge user throughput and successfully ease the load imbalance between MBSs and PBSs. 关键词：资源分配算法接入方案异构网络上行链路下行链路解耦非线性整数规划负载不平衡

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A Novel Resource Allocation Algorithm based on Downlink and Uplink Decouple Access Scheme in Heterogeneous Networks

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