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Optimizing the Spectrum and Power Allocation for D2D-£nabled Communication Systems Using DC Programming

机译：使用直流编程优化D2D-£通信系统的频谱和功率分配

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摘要

Device to device (D2D) communication has recently attracted a lot of attentions since it can significantly improve the system throughput and reduce the energy consumption. Indeed, the devices can communicate with each other in a D2D system, and the base station (BS) can share the spectrum with D2D users, which can efficiently improve the spectrum and energy efficiency. Nevertheless, spectrum sharing also raises the difficulty of resource allocation owing to the serious cochannel interference. To reduce the interference, the transmit power of the D2D pairs and BS to cellular users should be further optimized. In this paper, we consider the resource allocation problem of D2D networks involving the power allocation and subcarrier assignment. The resource allocation problem is formulated as a mixed integer programming problem which is difficult to solve. To reduce the computational complexity, the original problem is decomposed as two subproblems in terms of the subcarrier assignment and power allocation. For the subcarrier assignment problem, the particle swarm optimization (PSO) is adopted to solve it since the subcarrier assignment is an integer optimization problem, and it is difficult to be tackled using the traditional optimization approach. When the subcarrier assignment is fixed, there are only the power allocation variables in the original resource allocation problem. The difference of convex functions (DC) programming is adopted to solve the power allocation problem. Simulation results demonstrate the effectiveness of the proposed resource allocation scheme of D2D networks.
机译：设备到设备（D2D）通信最近吸引了大量的注意事项，因为它可以显着提高系统吞吐量并降低能量消耗。实际上，设备可以在D2D系统中彼此通信，并且基站（BS）可以与D2D用户共享频谱，这可以有效地提高频谱和能量效率。然而，由于严重的Cochannel干扰，频谱共享也引发了资源分配的难度。为了减少干扰，应该进一步优化D2D对和BS到蜂窝用户的发射功率。在本文中，我们考虑了涉及电力分配和子载波分配的D2D网络的资源分配问题。资源分配问题被制定为混合整数编程问题，这很难解决。为了降低计算复杂性，原始问题在子载波分配和功率分配方面被分解为两个子问题。对于子载波分配问题，采用粒子群优化（PSO）来解决它，因为子载波分配是一个整数优化问题，并且难以使用传统的优化方法来解决。当子载波分配固定时，在原始资源分配问题中只有电源分配变量。采用凸函数（DC）编程的差异来解决功率分配问题。仿真结果证明了D2D网络建议资源分配方案的有效性。

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  • 来源
    《Journal of electrical and computer engineering》 |2020年第1期|6135257.1-6135257.10|共10页
  • 作者

    Gan Guomei; Huang Yanhu; Wang Qiang;

  • 作者单位

    Yulin Normal Univ Sch Phys & Telecommun Engn Yulin Peoples R China;

    Yulin Normal Univ Sch Phys & Telecommun Engn Yulin Peoples R China;

    Yulin Normal Univ Guangxi Coll & Univ Key Lab Complex Syst Optimiza Yulin Peoples R China;

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