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Efficient link scheduling with joint power control and successive interference cancellation in wireless networks

无线网络中联合功率控制和串行干扰消除的高效链路调度算法

Abstract

Existing works have addressed the interference mitigation by any two of the three approaches: link scheduling, power control, and successive interference cancellation (SIC). In this paper, we integrate the above approaches to further improve the spectral efficiency of the wireless networks and consider the max-min fairness to guarantee the transmission demand of the worst-case link. We formulate the link scheduling with joint power control and SIC (PCSIC) problem as a mixed-integer non-linear programming (MINLP), which has been proven to be NP-complete. Consequently, we propose an iterative algorithm to tackle the problem by decomposing it into a series of linear subproblems, and then the analysis shows that the algorithm has high complexity in the worst case. In order to reduce the computational complexity, we have further devised a two-stage algorithm with polynomial-time complexity. Numerical results show the performance improvements of our proposed algorithms in terms of the network throughput and power consumption compared with the link scheduling scheme only with SIC.

创新点

本文提出了一种联合功率控制和串行干扰消除的跨层链路调度算法。通过功率控制实现信号接收功率的差异化, 使得接收端能够使用串行干扰消除技术同时对多个分组进行接收, 并通过给用户分配不同时隙进一步消除链路之间的干扰, 提升了全网的吞吐量, 同时考虑了长期的公平性, 实现了用户需求和网络最大化吞吐量之间的折中方案。

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Correspondence to Yan Shi.

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Li, X., Shi, Y., Wang, X. et al. Efficient link scheduling with joint power control and successive interference cancellation in wireless networks. Sci. China Inf. Sci. 59, 122301 (2016). https://doi.org/10.1007/s11432-015-5468-6

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Keywords

  • successive interference cancellation
  • power control
  • mathematical optimization
  • fairness
  • cross-layer link scheduling framework

关键词

  • 串行干扰消除
  • 功率控制
  • 最优化
  • 公平性
  • 跨层链路调度。