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首页> 外文期刊>Arabian Journal for Science and Engineering >An Iterative Method for Resource Leasing in Cognitive Radio Networks
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An Iterative Method for Resource Leasing in Cognitive Radio Networks

机译：认知无线电网络中资源租赁的迭代方法

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摘要

Solutions for better spectrum utilization have widely been investigated in the past years. Recently, spectrum leasing has been proposed as a powerful technique for spectrum management in communication networks. In this paper, we propose a new leasing scheme in both time and frequency domains joint with cooperative communication for cognitive orthogonal frequency-division multiplexing (OFDM) systems in a network composed of a primary transmitter and some secondary users forming a cooperative relay network. In the proposed scheme, the primary user decides to lease a part of its available resources (time and frequency) to a group of relays, with the aim of increasing its link reliability. Two schemes, simple and intelligent, are studied for resource allocation. We show that the simple scheme which is more applicable has same result as the intelligent scheme in most of situations. An iterative negotiation between the primary and secondary networks is assumed in this process to find the optimal amount of available OFDM symbols as well as subcarriers that should be involved in the cooperation process. Simulation results show that the primary network can achieve a higher data rate using our proposed iterative cooperation process compared to the case where no cooperation is exploited. Besides, our simulation results show that the secondary users also may increase their quality of service in terms of their link achievable data rate, via this cooperation process.
机译：过去几年来，人们一直在广泛研究提高频谱利用率的解决方案。近来，已经提出频谱租赁作为通信网络中频谱管理的有力技术。在本文中，我们提出了一种在时域和频域中联合协作通信的新租赁方案，用于由主发射机和一些辅助用户组成协作中继网络的网络中的认知正交频分复用（OFDM）系统。在提出的方案中，主要用户决定将一部分可用资源（时间和频率）租给一组中继，以提高其链路可靠性。研究了两种方案，简单和智能，用于资源分配。我们表明，在大多数情况下，更适用的简单方案与智能方案具有相同的结果。在此过程中，假定在主网络和辅助网络之间进行迭代协商，以找到最佳数量的可用OFDM符号以及协作过程中应涉及的子载波。仿真结果表明，与不使用协作的情况相比，使用我们提出的迭代协作过程，主网络可以实现更高的数据速率。此外，我们的仿真结果表明，通过此合作过程，次要用户还可以通过其链接可达到的数据速率来提高其服务质量。

著录项

  • 来源
    《Arabian Journal for Science and Engineering》 |2013年第10期|2735-2743|共9页
  • 作者

    Seyed Mahdi Mousavi Toroujeni; Seyed Mohammad-Sajad Sadough; Seyed Ali Ghorashi;

  • 作者单位

    Cognitive Telecommunication Research Group, Department of Electrical Engineering, Faculty of Electrical and Computer Engineering, Shahid Beheshti University G. C., 1983963113 Tehran, Iran;

    Cognitive Telecommunication Research Group, Department of Electrical Engineering, Faculty of Electrical and Computer Engineering, Shahid Beheshti University G. C., 1983963113 Tehran, Iran;

    Cognitive Telecommunication Research Group, Department of Electrical Engineering, Faculty of Electrical and Computer Engineering, Shahid Beheshti University G. C., 1983963113 Tehran, Iran;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cognitive radio; Spectrum leasing; Cooperative communications; Iterative process;

    机译：认知广播;频谱租赁;合作交流;迭代过程;

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