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Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading

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Abstract

This paper investigates the cooperative multihop cognitive relay networks (CRNs) under a novel two-dimensional spatial-temporal opportunity model, in which free opportunity and sharing opportunity are defined to enhance the spectrum efficiency. Correspondingly, a joint spatial-temporal access scheme (JSTAS) is proposed to realize successive spectrum access for continuous data transmission. The multihop CRNs with fixed relaying employ decode-and-forward with and without signal-to-noise ratio selection, which are named as SDF and DF, respectively. Then, considering the interference constraints from multiple primary receivers, the interference of one primary transmitter and the maximum transmit powers of cognitive users, we study the outage performance of multihop CRNs with JSTAS over Nakagami-m fading. To comprehensively evaluate JSTAS, we further present the pure spatial access scheme (SAS) and the pure temporal access scheme (TAS) under the spatial-temporal opportunity model, and calculate their average network outage probabilities. Simulation results demonstrate that SDF outperforms DF, while JSTAS outperforms SAS and TAS under all considered scenarios.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under grant 61233007, 61673371, and 71661147005, and Youth Innovation Promotion Association, CAS under grant 2015157.

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Authors and Affiliations

  1. State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China

    Chi Xu, Meng Zheng, Wei Liang & Haibin Yu

  2. Key Laboratory of Networked Control Systems, Chinese Academy of Sciences, Shenyang, 110016, China

    Chi Xu, Meng Zheng, Wei Liang & Haibin Yu

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Chi Xu

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  1. Chi Xu
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Correspondence to Chi Xu or Haibin Yu.

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Xu, C., Zheng, M., Liang, W. et al. Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading. Wireless Pers Commun 95, 3097–3117 (2017). https://doi.org/10.1007/s11277-017-3986-9

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