In Vehicle-to-Everything (V2X) networks, where all vehicles and infrastructures are interconnected for information sharing, data dissemination is increasingly playing a significant role in superior and pluralistic communication services. To empower the efficiency of data dissemination, in this paper, we propose a novel unmanned aerial vehicle (UAV)-enabled scheduling protocol consisting of a proactive caching policy and a file sharing strategy in V2X networks. In the proactive caching process, we deploy UAVs as flying base stations (BSs) with caching capability, where we propose a UAV dynamic trajectory scheduling (DTS) algorithm to optimize the caching duration. Whereas in the file sharing strategy, based on the previous vehicular caching status, we provide a framework of file sharing cycle for data dissemination scheduling and employ a channel prediction algorithm to alleviate communication overhead. Moreover, we propose a relay ordering algorithm to effectively improve the file sharing process. Simulation results demonstrate that, our proposed scheduling protocol can enhance the efficiency of data dissemination and achieve an improved network performance in terms of caching process, system throughput, and file sharing latency in V2X networks.
Bibliographical noteFunding Information:
Manuscript received November 19, 2020; revised January 25, 2021; accepted February 21, 2021. Date of publication March 9, 2021; date of current version June 16, 2021. This work is supported in part by the Ministry National Key Research and Development Project under Grant 2019YFE0196600, in part by the National Natural Science Foundation of China under Grant 61901302 and 61771431, in part by the Natural Science Foundation of Shanghai under Grant 20ZR1462400, in part by the open research fund of National Mobile Communications Research Laboratory, Southeast University (No. 2020D01), in part by the Fundamental Research Funds for the Central Universities (China), and is also funded by State Key Laboratory of Advanced Optical Communication Systems Networks, China, and in part by the National Science Foundation under Grant CPS-2103256 and ECCS-2102312. This article was presented in part at the 2019 IEEE Global Communications Conference (GLOBECOM 2019). The associate editor coordinating the review of this article and approving it for publication was S. Coleri. (Corresponding author: Xiang Cheng.) Rongqing Zhang is with the School of Software Engineering, Tongji University, Shanghai 201804, China, and also with the National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China (e-mail: email@example.com).
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- V2X networks
- data dissemination
- file sharing
- proactive caching