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Wireless Networks

, Volume 23, Issue 2, pp 609–623 | Cite as

Revisiting relay assignment in cooperative communications

  • Bin Cao
  • Quan Chen
  • Gang Feng
  • Yun Li
  • Chonggang WangEmail author
Article

Abstract

The performance gain of cooperative communications heavily depends on the selection of relay. Most of the existing relay selection methods for cooperative communications aim at maximizing cooperative gain by selecting appropriate relay, without taking into account the adverse effect brought by cooperative communications: extra interference introduced by relay transmission (called cooperation interference). Thus the derived performance gain could be inaccurate and/or the selected relay may be not optimal. In this paper, we address the assignment of relays for multiple communication sessions using cooperative communication mode in wireless networks. We first thoroughly investigate the adverse effect brought by using relays, and derive the cooperation gain with consideration of cooperation interference. Based on the insights of our investigation, we propose a method of assigning relays to individual transmission flows while taking into account cooperation interference. In order to tradeoff the advantage and adverse effect caused by relay transmissions, we use an auction approach to address relay assignment of cooperative communications. Specifically, we propose a single round double auction scheme (SAS) for centralized wireless network and a multiple rounds sequential auction scheme (MAS) for decentralized wireless network for relay assignment. We conduct extensive simulation experiments to validate the effectiveness of SAS and MAS. The significance of cooperation interference, the improvement of overall system throughput and energy efficiency of our proposed relay assignment schemes are demonstrated by numerical results.

Keywords

Cooperative communications Relay selection Cooperation interference Auction 

Notes

Acknowledgments

This work was supported by Program for Changjiang Scholars and Innovative Research Team in University (IRT1299) and the special fund of Chongqing key laboratory (CSTC).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Bin Cao
    • 1
  • Quan Chen
    • 1
  • Gang Feng
    • 3
  • Yun Li
    • 1
    • 2
  • Chonggang Wang
    • 4
    Email author
  1. 1.Key Lab of Mobile Communication TechnologyChongqing University of Posts and TelecommunicationsChongqingChina
  2. 2.National Mobile Communications Research LaboratorySoutheast UniversityNanjingChina
  3. 3.National Key Laboratory of Science and Technology on CommunicationsUniversity of Electronic Science and Technology of ChinaChengduChina
  4. 4.InterDigital CommunicationsKing of PrussiaUSA

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