A Joint Scheduling and Power Control Scheme for Hybrid I2V/V2V Networks
A Joint Scheduling and Power Control Scheme for Hybrid I2V/V2V Networks
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DOI：
10.1109/tvt.2020.3031553
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发表时间：
2020-12
影响因子：
6.8
通讯作者：
Bach Long Nguyen;D. T. Ngo;Minh N. Dao;Quang-Thang Duong;M. Okada
中科院分区：
文献类型：
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作者：
Bach Long Nguyen;D. T. Ngo;Minh N. Dao;Quang-Thang Duong;M. Okada
在汽车信息娱乐系统中，使用应用程序的车辆通过连续的基础设施到车辆（I2V）通信来服务。此外，由于路边单元（RSU）覆盖的区域较小，I2V通信可以与车辆到车辆（V2V）连接相结合。然而，当数十辆车在覆盖区域内同时请求服务时，它们必须竞争有限的带宽。在本文中，我们提出了一种联合调度和功率控制方案的I2V和V2V链路在RSU的覆盖范围。将I2V和V2V链路映射到元组链路，我们制定了一个混合整数非线性规划（MINLP）问题，其中频率调度器和功率控制器为这些元组链路联合设计。然后，我们采用延迟列生成技术和传输模式的定义分解成一个传输模式调度问题，以及功率控制问题的MINLP问题。其中，传输模式调度问题是解决线性规划，而贪婪功率控制算法的发展。实际参数设置的仿真结果表明，我们提出的方案优于几个传统的方案在服务中断和实现吞吐量，同时保持请求车辆之间的吞吐量公平性。特别是，一个高的信道数，一个小的功率电平数，和一个大的缓冲区大小的请求车辆被证明是有帮助的，我们提出的方案。
In automotive infotainment systems, vehicles using the applications are serviced via continuous infrastructure-to-vehicle (I2V) communications. Additionally, the I2V communications can be combined with vehicle-to-vehicle (V2V) connectivity owing to the small area covered by road side units (RSUs). However, dozens of vehicles have to compete for limited bandwidth when they request service simultaneously in the covered area. In this paper, we propose a joint scheduling and power control scheme for I2V and V2V links in the RSUs’ coverage range. Mapping the I2V and V2V links to tuple-links, we formulate a mixed-integer nonlinear programming (MINLP) problem where frequency scheduler and power controller for those tuple-links are jointly designed. Then, we employ the delayed column generation technique and the transmission pattern definition to decompose the MINLP problem into a transmission pattern scheduling problem, as well as a power control problem. Therein, the transmission pattern scheduling problem is solved by linear programming while a greedy power control algorithm is developed. Simulation results with practical parameter settings show that our proposed scheme outperforms several conventional schemes in terms of service disruption and achieved throughput while maintaining throughput fairness among the requesting vehicles. In particular, a high channel number, a small power level number, and a large buffer size at the requesting vehicles are shown to be helpful for our proposed scheme.