| 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 |
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| 作者姓名： | 李艾芸 邱玲 |
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| 作者单位： | 中国科学技术大学个人通信与扩频实验室, 合肥 230027 |
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| 基金项目： | 国家自然科学基金(11175173)资助 |
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| 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.
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| 关 键 词： | 异构网络 网络选择 资源分配 比例速率限制 |
| 收稿时间： | 2013-10-31 |
| 修稿时间： | 2014-03-04 |
Network selection and resource allocation algorithm in heterogeneous wireless networks with proportional rate constraint |
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| Authors: | LI Aiyun QIU Ling |
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| Institution: | Personal Communications Network and Spectrum Spread Lab, University of Seience and Technology of China, Hefei 230027, China |
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| 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. |
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| Keywords: | heterogeneous wireless networks network selection resource allocation proportional rate constraint |
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