Skip to main content
SpringerLink
Log in

Optimal Power Allocation and Relay Selection in Multi-hop Cognitive Relay Networks

  • Published:
Wireless Personal Communications Aims and scope Submit manuscript

Abstract

Cognitive relay is able to increase the network coverage and improve the spectral utilization by exploiting vacant spectrum resources. In this paper, the optimal power allocation and relay selection strategies are proposed to improve the data transmission from source to destination in both dual-hop and multi-hop scenarios. The optimal strategy can minimize the total transmission power and maximize the network capacity under outage and interference constraints. Closed-form solutions of proposed strategies are achieved with the network capacity enhancement. Simulation results verify the effectiveness and correctness of proposed power allocation and relay selection strategies in both dual-hop and multi-hop scenarios.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

  1. Haykin, S. (2005). Cognitive radio: Brain-empowered wireless communications. IEEE Journal on Selected Areas in Communications, 23(2), 201–220.

    Article  Google Scholar 

  2. Nadkar, T., Thumar, V., Desai, U. B., & Merchant, S. N. (2010). Optimum bit loading for cognitive relaying. In Proceedings of IEEE WCNC.

  3. Li, Y., & Zheng, F. (2012). Relay selection and power allocation in analogue network coding system with asymmetric traffic under imperfect CSI. In IEEE Globecom.

  4. Luo, C., Richard Yu, F., Ji, H., & Leung, V. C. M. (2010). Distributed relay selection and power control in cognitive radio networks with cooperative transmission. In IEEE ICC.

  5. Sidhu, G. A. S., Gao, F., Wang, W., & Chen, W. (2013). Resource allocation in relay-aided OFDM cognitive radio networks. IEEE Transactions on Vehicular Technology, 62(8), 3700–3710.

    Article  Google Scholar 

  6. Zhang, Q., Feng, Z., & Zhang, P. (2012). Joint cooperative relay scheme for spectrum-efficient usage and capacity improvement in cognitive radio networks. EURASIP Journal on Wireless Communications and Networking, 37, 1–9.

    Google Scholar 

  7. Li, L., Zhou, X., et al. (2011). Simplified relay selection and power allocation in cooperative cognitive radio systems. IEEE Transactions on Wireless Communications, 10(1), 33–36.

    Article  Google Scholar 

  8. Tsai, Y. R., & Lin, L. C. (2010). Optimal power allocation for decode-and-forward cooperative diversity under an outage performance constraint. IEEE Communications Letters, 14(10), 945–947.

    Article  Google Scholar 

  9. Babaee, R., & Beaulieu, N. C. (2010). Cross-layer design for multihop wireless relaying networks. IEEE Transactions on Wireless Communications, 9(11), 3522–3531.

    Article  Google Scholar 

  10. Gui, B., Dai, L., & Cimini, L. J. (2009). Routing strategies in multihop cooperative networks. IEEE Transactions on Wireless Communications, 8(2), 843–855.

    Article  Google Scholar 

  11. Ruan, L., & Lau, V. K. N. (2010). Decentralized dynamic hop selection and power control in cognitive multi-hop relay systems. IEEE Transactions on Wireless Communications, 9(10), 3024–3030.

    Article  Google Scholar 

  12. Zhai, L., Ji, H., Li, X., & Tang, Y. (2012). Coalition graph game for joint relay selection and resource allocation in cooperative cognitive radio networks. In IEEE Globecom.

  13. Lee, J., Wang, H., Andrews, J. G., & Hong, D. (2011). Outage probability of cognitive relay networks with interference constraints. IEEE Transactions on Wireless Communications, 10(2), 390–395.

    Article  Google Scholar 

  14. Chen, G., Tian, Z., Gong, Y., & Chambers, J. (2014). Decode-and-forward buffer-aided relay selection in cognitive relay networks. IEEE Transactions on Vehicular Technology, 63(9), 4723–4728.

    Article  Google Scholar 

  15. Chen, D., Ji, H., & Li, X. (2011). An energy-efficient distributed relay selection and power allocation optimization scheme over wireless cooperative networks. In IEEE ICC.

  16. Wang, B., Han, Z., & Liu, K. J. R. (2009). Distributed relay selection and power control for multiuser cooperative communication networks using stackelberg game. IEEE Transactions on Mobile Communications, 8(7), 975–990.

    Article  Google Scholar 

  17. Xiao, Y., Bi, G., & Niyato, D. (2011). Game theoretic analysis for spectrum sharing with multi-hop relaying. IEEE Transactions on Wireless Communications, 10(5), 1527–1537.

    Article  Google Scholar 

  18. Luo, Z., & Yu, W. (2006). An introduction to convex optimizatin for communications and signal processing. EEE Journal on Selected Areas in Communications, 24(8), 1426–1438.

    Article  Google Scholar 

  19. Boyd, S., & Vandenberghe, L. (2004). Convex optimization. Cambridge, UK: Cambridge University Press.

    Book  MATH  Google Scholar 

  20. West, D. B. (2007). Introduction to graph theory (3rd ed.). Upper Saddle River: Prentice Hall.

    Google Scholar 

  21. Digham, F. F., Alouini, M., & Simon, M. K. (2003). On the energy detection of unknown signals over fading channels. In IEEE ICC, pp. 3575–3579.

  22. Yan, S., Wang, X., & Zhang, H. (2010). Performance analysis of the cognitive cooperative scheme based on cognitive relays. In IEEE ICC.

Download references

Acknowledgments

This work was supported by the Beijing Municipal Science and Technology Commission research fund project No. D151100000115002, the Fundamental Research Funds for the Central Universities under grant No. 2014ZD03-02, the National Natural Science Foundation of China (61201152), the National High Technology Research and Development Program of China (863 Program 2015AA01A705).

Author information

Authors and Affiliations

  1. Key Lab. of Universal Wireless Communications Ministry of Education, Information and Telecommunication Engineering of Beijing University of Posts and Telecommunications (BUPT), Haidian Dist. Xitucheng Rd., Beijing, 100876, People’s Republic of China

    Qixun Zhang, Zhiyong Feng & Tuo Yang

  2. Department of Electrical and Computer Engineering, University of Victoria, Victoria, V8W 3P6, Canada

    Wei Li

Authors
  1. Qixun Zhang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Zhiyong Feng
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Tuo Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Wei Li
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Qixun Zhang.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Zhang, Q., Feng, Z., Yang, T. et al. Optimal Power Allocation and Relay Selection in Multi-hop Cognitive Relay Networks. Wireless Pers Commun 86, 1673–1692 (2016). https://doi.org/10.1007/s11277-015-3013-y

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11277-015-3013-y

Keywords

Search

Navigation