Abstract
The resource allocation for device-to-device (D2D) multicast communications is investigated. To achieve fair energy efficiency (EE) among different multicast groups, the max-min fairness criterion is used as the optimization criterion and the EE of D2D multicast groups are taken as the optimization objective function. The aim is to maximize the minimum EE for different D2D multicast groups under the constraints of the maximum transmit power and minimum transmit rate, which is modeled as a non-convex and mixed-integer fractional programming problem. Here, suboptimal resource allocation algorithms are proposed to solve this problem. First, channel assignment scheme is performed to assign channel to D2D multicast groups. Second, for a given channel assignment, iterative power allocation schemes with and without loss of cellular users’ rate are completed, respectively. Simulation results corroborate the convergence performance of the proposed algorithms. In addition, compared with the traditional throughput maximization algorithm, the proposed algorithms can improve the energy efficiency of the system and the fairness achieved among different multicast groups.
摘要:
研究了D2D 组播通信中的资源分配问题, 为了获得公平的能量效率, 采用最大最小公平准则 作为优化准则, 以D2D 组播的能量效率作为优化目标函数, 在考虑最大发射功率约束和最小速率约 束的情况下, 通过最大化最小D2D 组播的能量效率来实现公平的资源分配, 并将上述优化问题建模 为非凸的、混合整数规划问题. 提出了一种次优的资源分配算法来求解上述问题. 首先, 采用提出的 信道分配算法将信道资源分配给不同的D2D 组播用户. 然后, 对于给定的信道分配, 提出了两种迭 代的功率分配算法. 仿真实验结果证明了提出算法的收敛性. 另外, 与传统的吞吐量最大化算法进行 了比较, 实验结果表明提出的算法能够提高系统的能量效率, 并且保证不同D2D 组播之间的公平性.
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Foundation item: Projects(61801237, 61701255) supported by the National Natural Science Foundation of China; Project(SBH17024) supported by the Postdoctoral Science Foundation of Jiangsu Province, China; Project(15KJB510026) supported by the Natural Science Foundation of the Jiangsu Higher Education Institutions, China; Project(BK20150866) supported by the Natural Science Foundation of Jiangsu Province, China; Projects(NY215046, NY217056) supported by the Introduction of Talent Fund of Nanjing University of Posts and Telecommunications, China
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Zuo, Jk., Yang, Lx. Energy efficient resource allocation for D2D multicast communications. J. Cent. South Univ. 26, 3034–3044 (2019). https://doi.org/10.1007/s11771-019-4234-0
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DOI: https://doi.org/10.1007/s11771-019-4234-0