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摘要机会频谱接入被认为是一种实现异构无线网络间频谱资源共享的有效途径之一。之前的相关研究很少考虑信道质量信息对于机会频谱接入性能的影响。针对这一问题,该文综合考虑主用户信道占用信息和次用户的信道质量信息来设计机会频谱接入策略,并通过求解凸优化问题获得了一种基于信道质量门限的策略。该策略能够最大化次用户获得的有效吞吐率,同时满足主用户对传输质量的要求,且在单信道场景下具有最优性。仿真结果表明: 该策略能够显著提高次用户的有效吞吐率。
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| 关键词 ：机会频谱接入,信道质量,有效吞吐率,最优性 |
Abstract：Opportunistic spectrum access is a promising approach to realize spectrum sharing between heterogeneous wireless networks. Previous research has not thoroughly considered the effect of the channel quality information on the opportunistic spectrum access. This study considers both the channel occupation information of the primary user and the channel quality information of the secondary user to design an opportunistic spectrum access policy with a channel quality threshold based policy by solving a convex optimization problem. This policy maximizes the effective throughput of the secondary user, while meeting the transmission quality requirement of the primary user, and is proved to be optimal in single channel scenarios. Numerical results show that this opportunistic spectrum access policy significantly improves the effective throughput of the secondary user.
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| Key words：opportunistic spectrum accesschannel qualityeffective throughputoptimality |
| 收稿日期: 2014-01-16 出版日期: 2015-04-17 |
| 基金资助:国家科技重大专项 (2013ZX03001024-004);国家 “九七三” 重点基础研究项目 (2013CB329002);国家自然科学青年基金项目 (61201192);国家 “八六三” 高技术项目 (2012AA011402);清华自主科研项目 (2011THZ02-2);国家国际科技合作项目 (2012DFG12010);爱立信合作项目 (20123000059) |
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