异构网络中基于比例速率限制的网络选择和资源分配算法

doi:10.7523/j.issn.2095-6134.2014.06.014

中国科学院大学学报 ›› 2014, Vol. 31 ›› Issue (6): 821-826.DOI: 10.7523/j.issn.2095-6134.2014.06.014

异构网络中基于比例速率限制的网络选择和资源分配算法

李艾芸, 邱玲

中国科学技术大学个人通信与扩频实验室, 合肥 230027

收稿日期:2013-10-31 修回日期:2014-03-04
通讯作者: 邱玲
基金资助:
国家自然科学基金(11175173)资助

Network selection and resource allocation algorithm in heterogeneous wireless networks with proportional rate constraint

LI Aiyun, QIU Ling

Personal Communications Network and Spectrum Spread Lab, University of Seience and Technology of China, Hefei 230027, China

Received:2013-10-31 Revised:2014-03-04

摘要/Abstract

摘要：

针对UMTS/WLAN异构网络中的无线资源管理问题,提出基于比例速率限制的网络选择和资源分配算法.为保证用户间的公平性,将问题建模为带比例速率约束的系统吞吐量最大化问题.通过求解放松约束后的优化问题,得出用户网络选择与其到不同网络的可达速率之比相关的推论,并依此提出一种低复杂度的分布式算法.仿真结果表明,所提算法与原优化问题解的上界相比只有较小的性能损失,同时能有效保证用户间的公平性.

关键词: 异构网络, 网络选择, 资源分配, 比例速率限制

Abstract:

Considering the radio resource management problem in UMTS/WLAN heterogeneous networks,we propose a network selection and resource allocation algorithm with proportional rate constraint. In order to ensure the fairness among the users,the system sum-rate maximization problem subject to proportional rate constraint is considered. By relaxing the constraint and solving the problem,we get a deduction that the network selection is related to the user's rate ratio between different networks. Based on this,a low-complicity distribution algorithm is proposed. Simulation results show that the algorithm has minor degradation compared with the upper-bound performance. Additionally,the algorithm can effectively guarantee the fairness among users.

Key words: heterogeneous wireless networks, network selection, resource allocation, proportional rate constraint

中图分类号:

TN925

李艾芸, 邱玲. 异构网络中基于比例速率限制的网络选择和资源分配算法[J]. 中国科学院大学学报, 2014, 31(6): 821-826.

LI Aiyun, QIU Ling. Network selection and resource allocation algorithm in heterogeneous wireless networks with proportional rate constraint[J]. , 2014, 31(6): 821-826.

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