毫米波微小区网络中基于公平准则的分布式用户关联算法
Distributed User Association Algorithm Based on Fairness Criterion in Millimeter Wave Small Cell Network
  
DOI:
中文关键词:  5G,毫米波,公平准则,凸优化,对偶理论
英文关键词:5G, millimeter wave, fairness criterion, convex optimization, duality theory
基金项目:国家自然科学基金(61461023);甘肃省青年自然基金(18JR3RA231,1610RJYA021);甘肃省高校创新创业能力提升项目(2019A-144);兰州市科技计划项目(2017-4-101,2018-RC-31);兰州工业学院“启智冶人才培养计划(2019QZ-03);兰州工业学院“开物冶科研创新团队支持计划(2018KW-01);甘肃省高校创新创业教育改革研究项目(2019-26);教育部产学合作协同育人项目(201802048017)
作者单位
马 骥1 马忠彧2,4 妙旭华3 马宏锋2,4 1. 约瑟夫·斯特凡国际研究生学院,斯洛文尼亚共和国卢布尔雅那市1000
2. 兰州工业学院电子信息工程学院, 兰州730050
3. 甘肃省环境科学设计研究院,兰州730050
4. 甘肃省资源环境信息化工程实验室,兰州730050 
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中文摘要:
      由于定向线性视距(Line-of-Sight,LOS)传输和对障碍物的敏感,使得毫米波微小区网络中的用户关联 问题更为复杂。提出一种毫米波微小区网络中基于公平准则的用户关联算法,首先建模毫米波信道的不稳定性和 用户切换成本,然后将基于公平准则的用户关联算法建模并证明为一个凸问题,利用拉格朗日对偶理论对原问题进 行求解。分析与仿真结果表明:(1)当小区切换成本较低时,用户终端(User Equipment, UE)仅关联至单个微基站 (Small Base Station, SBS)上为宜;(2)当小区切换成本较高时,UE 同时关联至多个微基站为宜;(3)与其它算法相 比,文中所提方法吞吐量增益显著。
英文摘要:
      User association problems in millimeter- wave small cell networks are more complicated due to its characteristic of directional LOS transmission and sensitivity to obstacles. A distributed user association algorithm based on fairness criterion in millimeter-wave microcell network is proposed. Firstly, the instability of millimeter-wave channel and user switching cost are modeled. Then the user association algorithm based on fairness criterion is formulated and proved to be a convex problem. The Lagrangian duality theory is used to solve the original problem. The analysis and simulation results show that: (1) When the handover cost is low or zero, user equipment (UE) should be only associated with one SBS; (2) When the cell handover cost is high, UE should be associated with multiple SBSs simultaneously; (3) Compared with other algorithms, the proposed algorithm has a significant gain in terms of throughput.
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