通信学报 ›› 2013, Vol. 34 ›› Issue (12): 42-48.doi: 10.3969/j.issn.1000-436X.2013.12.005

• 学术论文 • 上一篇    下一篇

主用户干扰约束下的机会频谱接入感知-传输时隙优化调度

张晶1,2,陆音2,高西奇1,郑福春1   

  1. 1 东南大学移动通信国家重点实验室，江苏南京210096
    2 南京邮电大学电子科学与工程学院江苏省无线通信重点实验室，江苏南京210003
  • 出版日期:2013-12-25 发布日期:2017-07-05
  • 基金资助:
    国家重点基础研究发展计划（“973”计划）基金资助项目;国家科技重大专项基金资助项目;国家博士后科学基金资助项目;江苏省博士后科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;南京邮电大学自然科学基金资助项目;南京邮电大学自然科学基金资助项目

Sensing-then-transmission slot scheduling optimization for opportu-nistic spectrum access under the interference constraint of primary us-ers

Jing ZHANG1,2,Yin LU2,Xi-qi GAO1,Fu-chun ZHENG1   

  1. 1 National Mobile Communications Research Laboratory heast University, Nanjing 210096, China
    2 Key Laboratory of Wireless Communication in Jiangsu Province, College of Electronic Science ＆ Engineering,Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Online:2013-12-25 Published:2017-07-05
  • Supported by:
    The National Key Basic Research ＆ Development Program (973 Program);The National Science ＆ Technology Major Project;State Postdoctoral Science Foundation Project;Postdoctoral Science Foundation Project of Jiangsu Province;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The Natural Science Foundation of NUPT;The Natural Science Foundation of NUPT

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摘要：

提出一种基于主用户干扰约束的机会频谱接入感知-传输时隙调度优化方案。首先，推导切换机制下认知系统的吞吐量和主用户干扰率，建立感知时间和感知周期联合优化模型；然后，在主用户干扰率和次用户感知质量双重约束下，推导了可最大化认知系统吞吐量的最优感知时间和感知周期的闭合表达式；最后，阐述了时隙优化调度方案并计算了认知系统可获得的最大吞吐量。仿真结果表明，所提出的时隙调度方案可以为认知系统提供更高的吞吐量，并更好地适应主用户干扰率和感知质量约束的变化。

关键词: 机会频谱接入, 时隙调度优化, 干扰约束, 系统吞吐量

Abstract:

A sensing-then-transmission slot scheduling scheme for opportunistic spectrum access under the interference constraint of primary users (PU) was proposed.First,the throughput of the cognitive radio system (CRS) with channel handoff mechanism and the interference ratio to PU were deduced.An optimization model combined the sensing time and sensing period was also set up.Then,the optimal sensing time and sensing period were derived by maximizing the throughput of the CRS subject to both interference ratio and sensing qua ity constraints.Based on the analysis,a time slot scheduling scheme was finally proposed.The achievable maximum throughput of the CRS was derived too.Simulation results indicate that the proposed slot scheduling scheme can enhance the throughput of the CRS,and fit the changes of interference ratio and sensing quality constraints better.

Key words: opportunistic spectrum access, slot scheduling optimization, interference constraint, system throughput

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