计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

基于动态SNR 门限的CoMP 反馈开销优化

刘 佳,郭爱煌   

  1. (同济大学电子与信息工程学院,上海201804)
  • 收稿日期:2013-08-19 出版日期:2014-09-15 发布日期:2014-09-12
  • 作者简介:刘 佳(1990-),男,硕士研究生,主研方向:宽带无线通信技术;郭爱煌,教授。
  • 基金项目:
    上海市自然科学基金资助项目(12ZR1433900);中央高校基础研究基金资助项目(0800219162)。

Optimization of CoMP Feedback Overhead Based on Dynamic SNR Threshold

LIU Jia,GUO Ai-huang   

  1. (School of Electronics & Information Engineering,Tongji University,Shanghai 201804,China)
  • Received:2013-08-19 Online:2014-09-15 Published:2014-09-12

摘要: 多点协作(CoMP)系统需要用户反馈大量的信道信息,以满足系统的性能增益,但系统的能耗会随着反馈开销的提升而增大。为此,设计基于动态SNR 门限的反馈算法,从绿色无线系统的观点出发,尽量降低系统的性能损失,并通过减少不必要的反馈信息,避免协作节点间不必要的交互信息,在系统性能和能耗之间取得较好平衡,提高系统的能量效率。仿真结果表明,与固定SNR 门限反馈算法和不采用选择性反馈的情况相比,该算法能 在满足系统性能要求的前提下,有效降低系统的反馈开销,实现降低系统能耗的目标。

关键词: 多点协作, 能耗, 反馈开销, 选择性反馈, 动态门限, 平均反馈链路数量

Abstract: In order to meet the system performance gain,CoMP system requires users to feedback a lot of the channel information. However,the energy consumption of the system also increases with the enhancement of feedback overhead.Feedback alogorithm based on dynamic SNR threshold is proposed in this paper,starting from the view of the green wireless system,achieves a good compromise between system performance and energy consumption under the premise of minimizing the performance loss to the system by reducing unnecessary feedback information, thereby reducing unnecessary cooperative interactive information between nodes, thus improve the energy efficiency of the system. Simulation results show that the proposed alogorithm can effectively reduce the feedback overhead of system compared with the fixed threshold SNR feedback alogorithm and situation which does not use selective feedback,under the system performance requirements.

Key words: Coordinated Multi-point (CoMP), energy consumption, feedback overhead, selective feedback;dynamic threshold, average feedback link number

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