基于APG合并及拓扑势优化的启发式用户关联策略  

APG mergence and topological potential optimization based heuristic user association strategy

作　　者：胡志蕊 毕美华[1] 许方敏[1] 何美霖 郑长亮 HU Zhirui;BI Meihua;XU Fangmin;HE Meilin;ZHENG Changliang(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《通信学报》2022年第6期98-107,共10页Journal on Communications

基　　金：浙江省自然科学基金资助项目(No.LY22F010012,No.LY20F050004,No.LQ20F010007);国家自然科学基金资助项目(No.62101169);江苏省新型光纤技术与通信网络工程研究中心开放研究课题基金资助项目(No.SDGC2120);毫米波国家重点实验室开放课题基金资助项目(No.K202111)。

摘　　要：针对去蜂窝网络的可扩展问题,定义了网络可扩展度作为性能衡量指标,设计了一种提高网络可扩展度的用户关联策略。该策略以网络耦合度最小和用户速率最大为优化目标。为了进一步降低求解该多目标优化问题的复杂度,通过利用拓扑势函数建立网络耦合度和用户速率的关系,提出了基于接入点簇(APG)合并及拓扑势优化的启发式算法。仿真结果表明,所提策略以较小的用户速率损失为代价提高了去蜂窝网络的可扩展度。与传统策略相比,用户速率损失4.43%时,可扩展度可提高9.59%;与文献[10]的策略相比,用户速率损失4.99%时,可扩展度可提高22.15%。Aiming at the scalability problem of cell-free networks,the network scalable degree was defined as a performance index,and a user association strategy was designed to improve the network scalable degree.The proposed strategy was formulated as a multi-objective optimization problem of minimum network coupling degree and maximum user rate.To solve the optimization problem,topological potential function was introduced to establish the relationship between network coupling degree and user rate.Then,a heuristic algorithm based on access point group(APG)mergence and topological potential optimization was formed.Simulation results verify that the proposed strategy can improve the network scalable degree of cell-free networks at the cost of less rate loss.Compared with the traditional strategy,the network scalable degree is improved by 9.59%with 4.43%user rate loss.Compared with the strategy in ref.[10],the network scalable degree is improved by 22.15%with 4.99%user rate loss.

关 键 词：去蜂窝网络 用户中心网络 可扩展性 用户关联策略 

分 类 号：TN929.5[电子电信—通信与信息系统]