Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (3): 25-33.doi: 10.6040/j.issn.1672-3961.0.2024.229

• Transportation Engineering—Special Issue for Intelligent Transportation • Previous Articles    

Data transmission scheduling optimization strategy of roadside unit based on location information

SHI Ying1,2, ZHANG Danyang2, WANG Tong1, CHEN Yiping2, FU Xin3*   

  1. SHI Ying1, 2, ZHANG Danyang2, WANG Tong1, CHEN Yiping2, FU Xin3*(1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China;
    2. School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, Heilongjiang, China;
    3. School of Transportation Engineering, Chang'an University, Xi'an 710064, Shaanxi, China
  • Published:2025-06-05

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Abstract: To address the problem of how to reduce the total delay of data transmission with relay between roadside units, considering the adaptive variation characteristics of the V2I downlink data transmission rate within the coverage of roadside units, a data transmission scheduling strategy based on vehicle location information was proposed. This strategy comprehensively considered the randomness of data update and the adaptability of data transmission rate of location difference, and constructed a Markov chain model based on the state transition of a data cache queue. At the same time, considering the existence of multiple vehicles in the roadside unit coverage area, a vehicle priority communication model based on the joint weight of vehicle speed and vehicle position was proposed to determine the communication service strategy. A nonlinear optimization function with the objective of minimizing the total delay of data transmission was established, and the optimal data transmission scheduling strategy of the roadside unit was obtained by linearization. The simulation results showed that the LTS strategy could effectively reduce the total transmission delay under the condition of vehicle arrival rate and data arrival rate change, and the strategy could resist the change of data arrival rate and had good stability of the data transmission.

Key words: cooperative vehicle-infrastructure system, roadside units, data transmission, location information, Markov chain, time delay

CLC Number: 

  • U491.2
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