计算机科学 ›› 2011, Vol. 38 ›› Issue (12): 31-35.

• 计算机网络与信息安全 • 上一篇    下一篇

基于联合优先级调度的协作动态频谱分配机制设计

王凡,姚富强,赵杭生,冯少栋,张建照   

  1. (解放军理工大学通信工程学院 南京210007);(总参第六十三研究所 南京210007);(中国人民解放军73682部队 徐州221006);(中国人民解放军96610部队 北京102208)
  • 出版日期:2018-12-01 发布日期:2018-12-01

Coordinated Dynamic Spectrum Allocation Mechanism Design Based on Combined Priority Scheduling

  • Online:2018-12-01 Published:2018-12-01

摘要: 在协作频谱接入过程中,共享频谱各网络中的频谱需求呈现高度动态性,现有机制难以兼顾分组传输时延和服务公平性。针对这一问题,提出一种基于联合优先级调度的协作动态频谱分配机制。将频谱分配问题建模为比例公平模型并联合网络的服务等级和用频请求的到达时间为各网络设定动态服务优先级,解得分配结果后,基于分配频谱的中心频率与需求频谱的中心频率最近的原则将频谱资源分配给各网络。仿真结果表明,与已有的基于网络固定优先级调度、基于网络动态优先级调度和基于用频请求动态优先级调度的协作频谱分配机制相比,本机制能够更好地保证网络获取频谱的公平性,并且在分组传输时延性能上有所改进。

关键词: 动态频谱分配,协作频谱接入,调度,时延,公平

Abstract: In coordinated spectrum access, when the networks sharing the same spectrum have highly varying spectrum requirement, existing mechanisms cannot provide better performance of end-to-end time delay and fairness. To tackle this problem, a coordinated dynamic spectrum allocation mechanism based on combined priority scheduling was proposed. The mechanism models the spectrum allocation as proportional fairness and set dynamic priority to networks by combining the service grade of networks and the arrival time of spectrum requirement. After figuring out the results of the proportional fairness model, the mechanism allocates spectrum according to the results based on the criterion that the center frequency of allocated spectrum is close to the spectrum requirement The simulation results show that the proposed mechanism can provide better fairness of spectrum allocation than existing mechanisms as network(or terminal) static priority, network(or terminal) dynamic priority and request dynamic priority based coordinated dynamic spectrum allocation, and also brings improvement in terms of performance of end-to-end time delay of packet transmislion.

Key words: Dynamic spectrum allocation,Coordinated spectrum access,Scheduling,Dime d}lay,Fairness

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