高速缓存海事无线网络中的 USV 浮标辅助多用户 MIMO 传输

IF 7.1 2区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Cheng Zeng;Jun-Bo Wang;Yijin Pan;Yijian Chen;Hongkang Yu;Liu Wei;Yucheng Wang;Ming Xiao;Jiangzhou Wang
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引用次数: 0

摘要

由于地理位置的限制,目前的海上无线网络在覆盖偏远海域方面面临挑战。为了解决海上远程通信中难以忍受的时延问题,本文提出了一种协同传输框架。与传统的有线连接或固定基站不同,我们采用无人水面车辆(USV)作为移动前传,用于沿航线部署启用缓存的浮标。采用多用户多输入多输出(MU-MIMO)技术提高分集增益,减少干扰。在此设置中,我们利用基于舰队的海上用户请求类似内容的趋势,制定了一个联合优化USV轨迹和多播波束形成的问题,以最大化舰队成员之间的最小速率。针对MIMO速率表达式中涉及矩阵反演和$\log \det (\cdot)$运算的轨迹与波束形成之间的耦合,提出了一种轨迹相关的等效速率变换方法,该方法消除了对块坐标下降过程的需要。利用拉格朗日对偶方法,我们推导出浮标网络波束形成的每个步骤的封闭解。仿真证实,usv支持的无线前传和协作框架显著降低了传输延迟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
USV-Buoy Assisted Multiuser MIMO Transmission in Cache-Enabled Maritime Wireless Networks
Current maritime wireless networks face challenges in covering remote sea areas due to geographical limitations. To address the intolerable latency often encountered in long-range maritime communications, this paper proposes a collaborative transmission framework. Unlike traditional wired connections or fixed base stations, we employ an uncrewed surface vehicle (USV) as a mobile fronthaul for cache-enabled buoys deployed along shipping routes. Multiuser multiple-input multiple-output (MU-MIMO) technology is implemented to enhance diversity gain and reduce interference. In this setup, we leverage the tendency of fleet-based marine users to request similar contents, formulating a problem that jointly optimizes the USV trajectory and multicast beamforming to maximize the minimum rate among fleet members. Due to the coupling between trajectory and beamforming in the MIMO rate expression involving matrix inversion and $\log \det (\cdot)$ operations, we propose a trajectory-dependent equivalent rate transformation method, which eliminates the need for a block coordinate descent process. Using the Lagrange dual method, we derive a closed-form solution for buoy network-wide beamforming at each step. Simulations confirm that the USV-enabled wireless fronthaul and collaborative framework significantly reduce transmission latency.
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来源期刊
CiteScore
6.00
自引率
8.80%
发文量
1245
审稿时长
6.3 months
期刊介绍: The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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