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计算机工程 ›› 2013, Vol. 39 ›› Issue (7): 106-109. doi: 10.3969/j.issn.1000-3428.2013.07.024

• 移动互联与通信技术 • 上一篇    下一篇

基于中继位置的自适应中继选择方案

卞立安,韩昌彩,李 媛   

  1. (天津大学电子信息工程学院,天津 300072)
  • 收稿日期:2012-07-09 出版日期:2013-07-15 发布日期:2013-07-12
  • 作者简介:卞立安(1985-),男,硕士研究生,主研方向:协作通信;韩昌彩,讲师、博士;李 媛,副教授、硕士
  • 基金资助:
    国家自然科学基金资助项目(61002010);天津大学自主创新基金资助项目

Adaptive Relay Selection Scheme Based on Relay Location

BIAN Li-an, HAN Chang-cai, LI Yuan   

  1. (School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China)
  • Received:2012-07-09 Online:2013-07-15 Published:2013-07-12

摘要: 针对协作通信中的中继选择问题,提出不同功率分配方式下的自适应中继选择方案,仅在必要时引入额外中继。在源节点和中继节点等功率分配时,利用定义的可行双中继区域缩小候选中继搜索范围。在最优功率分配时,利用几何规划方法对潜在中继进行遍历搜索。仿真结果表明,与传统固定选择方案相比,该方案可有效降低系统功耗。

关键词: 协作通信, 中继选择, 可行中继区域, 中继位置, 功率分配, 几何规划

Abstract: For the relay selection in cooperative communications, adaptive relay selection strategies are proposed for different power allocation schemes, where an additional relay can be employed when it is necessary. For Equal Power Allocation(EPA) among the source and relays, the search range of candidate relays can be effectively decreased by using the defined feasible two-relay region. For Optimal Power Allocation(OPA), the potential relays can be searched exhaustively by geometric programming. Numerical simulation results show that the proposed adaptive relay selection strategy with power optimization can significantly reduce the power consumption of the system compared with the traditional fixed selection strategy.

Key words: cooperative communications, relay selection, feasible relay region, relay location, power allocation, geometric programming

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