Dealing with Link Blockage in mmWave Networks: A Combination of D2D Relaying, Multi-beam Reflection, and Handover
Dealing with Link Blockage in mmWave Networks: A Combination of D2D Relaying, Multi-beam Reflection, and Handover
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DOI：
10.1109/twc.2022.3152472
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发表时间：
2022
影响因子：
10.4
通讯作者：
Mingjie Feng;S. Mao;Tao Jiang
中科院分区：
文献类型：
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作者：
Mingjie Feng;S. Mao;Tao Jiang
在本文中，我们考虑自适应用户设备（UE）的链路选择和用户关联毫米波（mmWave）网络。我们制定了一个联合优化的链路选择，资源分配和用户关联，旨在最大限度地提高所有UE的对数速率之和。通过将问题分解为两个层次的子问题来解决制定的问题。较低层次的子问题是链路选择和资源分配与给定的用户关联，这是解决了一个三阶段的过程。在第一阶段中，我们通过假设所有UE经由D2D中继被服务来建立D2D中继架构。基于中继结构，我们推导出在第二阶段的最优资源分配。最后，在第三阶段中提出了自适应链路选择算法，以确定从D2D中继切换到多波束反射的UE集合。高层次的子问题是用户关联，我们解决它的双重分解为基础的方法。仿真结果表明，与基准方案相比，所提出的方案实现的平均数据速率显着高于基准方案，接近上限。此外，该方案实现了系统性能和公平性之间的良好折衷。
In this paper, we consider adaptive user equipments (UE) link selection and user association in millimeter-wave (mmWave) networks. We formulate a joint optimization of link selection, resource allocation, and user association, aiming to maximize the sum logarithmic rate of all UEs. The formulated problem is solved by decomposing it into two levels of subproblems. The lower-level subproblem is link selection and resource allocation with a given user association, which is solved by a three-stage process. In the first stage, we establish the D2D relaying architecture by assuming that all UEs are served via D2D relaying. Based on the relaying architecture, we derive the optimal resource allocation in the second stage. Finally, an adaptive link selection algorithm is proposed in the third stage to determine the set of UEs that switch from D2D relaying to multi-beam reflection. The high-level subproblem is user association, for which we solve it with a dual decomposition-based approach. Simulation results indicate that compared to benchmark schemes, the average data rate achieved by the proposed scheme is significantly higher than the benchmark schemes and is close to an upper bound. Besides, the proposed scheme achieves a good tradeoff between system performance and fairness.