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A distributed cooperative relaying optimization scheme for secondary transmission in Cognitive Radio networks

  • Published:
Journal of Electronics (China)

Abstract

In Cognitive Radio (CR) networks, cooperative communication has been recently regarded as a key technology for improving the spectral utilization efficiency and ensuring the Quality of Service (QoS) for Primary Users (PUs). In this paper, we propose a distributed joint relay selection and power allocation scheme for cooperative secondary transmission, taking both Instantaneous Channel State Information (I-CSI) and residual energy into consideration, where secondary source and destination may have different available spectrum. Specifically, we formulate the cognitive relay network as a restless bandit system, where the channel and energy state transition is characterized by the finite-state Markov chain. The proposed policy has indexability property that dramatically reduces the computation and implementation complexity. Analytical and simulation results demonstrate that our proposed scheme can efficiently enhance overall system reward, while guaranteeing a good tradeoff between achievable date rate and average network lifetime.

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Author information

Authors and Affiliations

  1. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Dan Chen & Hong Ji

  2. Room 810, Mingguang Building, Beijing University of Posts and Telecommunications, No. 10, Xitucheng Road, Haidian District, Beijing, 100876, China

    Dan Chen

Authors
  1. Dan Chen
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  2. Hong Ji
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Corresponding author

Correspondence to Dan Chen.

Additional information

Supported by the National Natural Science Foundation (No. 60832009), the Beijing Municipal Natural Science Foundation (No. 4102044), and the National Natural Science Foundation for Distinguished Young Scholar (No. 61001115.

Communication author: Chen Dan, born in 1986, female, Ph.D..

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Chen, D., Ji, H. A distributed cooperative relaying optimization scheme for secondary transmission in Cognitive Radio networks. J. Electron.(China) 28, 8–14 (2011). https://doi.org/10.1007/s11767-011-0523-y

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  • DOI: https://doi.org/10.1007/s11767-011-0523-y

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