scholarly journals Stackelberg Game-Based Radio Resource Management Algorithm in an Urban Rail Transit Communication System

2021 ◽  
Author(s):  
Yingxia Shao ◽  
Hailin Jiang ◽  
Hongli Zhao
Keyword(s):  
Resource Management ◽  
Stackelberg Game ◽  
Radio Resource Management ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Radio Resource ◽  
Time Frequency ◽  
Management Algorithm ◽  
Urban Rail ◽  
Communication Modes

AbstractTrain-to-wayside (T2W) and train-to-train (T2T) communication modes may coexist in future train-centric communication-based train control (CBTC) systems. The feasibility of T2T communication in urban rail transit is analyzed first. Referring to the device-to-device (D2D) communication scenario in the general cellular network, this paper establishes a radio resource optimization model for the coexistence of train-to-train communication and train-to-wayside communication. With the aim of more efficient scheduling of radio time-frequency resources in the dedicated frequency band, we propose a Stackelberg game-based radio resource management algorithm based on the consideration of different service priorities of trains. The analysis and simulation results show that the proposed algorithm can effectively guarantee the performance of the system and improve the reliability of the CBTC system.

An experimental study on the characteristics of vibration source in urban rail transit turnouts

2019 ◽  
Vol 234 (9) ◽  
pp. 945-957 ◽  
Author(s):  
Liuchong Wang ◽  
Wang Ping ◽  
Caiyou Zhao ◽  
Dongya Liu ◽  
Wenhua Ke
Keyword(s):  
Structural Characteristics ◽  
Great Influence ◽  
Urban Rail Transit ◽  
Control Measures ◽  
Rail Transit ◽  
Vibration Source ◽  
Vibration Level ◽  
Tunnel Wall ◽  
Time Frequency ◽  
Urban Rail

Due to the structural characteristics of railway turnouts, as well as their vulnerability to damage and other problems, the environmental vibrations induced by urban rail transit often have a greater effect on the railway turnouts than that on an ordinary line. Therefore, it is necessary to carry out an in-depth study on the characteristics of vibration source on the turnouts. In this paper, a group of representative turnouts is selected for field testing on four typical lines of different operational times in a Chinese city. The profile and rail irregularity of the turnouts are measured to evaluate the service condition of the turnouts and the wheel–rail interaction. The vibration acceleration of the track structure and tunnel wall is measured as the train passes the turnout by setting the measuring points in the two main vibration sources, including the switch and the crossing section. The time–frequency domain analysis method is used to analyze these data. It is found that the source strength of the tunnel wall in the crossing section is much greater than that in the switch section, and that the lateral vibration level is often greater than the vertical vibration level. Unexpectedly, there is a low positive correlation between the vibration level and the train speed, while the healthy state of the turnout rails has a great influence on the vibration level. According to the results of the research, the sources of vibration excitation in the turnouts are complex; therefore, it is necessary to comprehensively evaluate their environmental impact and take corresponding vibration control measures.

Game Theory Based Radio Resource Management Algorithm for Packet Access Cellular Networks

2017 ◽  
Vol 9 (1) ◽  
pp. 19-32
Author(s):  
Mihály Varga ◽  
Zsolt Alfréd Polgár
Keyword(s):  
Game Theory ◽  
Resource Management ◽  
Radio Resource Management ◽  
Low Complexity ◽  
Radio Resource ◽  
Average Delay ◽  
Management Algorithm ◽  
High Spectral Efficiency ◽  
Suboptimal Solution ◽  
Multidimensional Optimization

AbstractThe goal of Radio Resource Management (RRM) mechanisms is to allocate the transmission resources to the users such that the transmission requests are satisfied while several constraints are fulfilled. These constraints refer to low complexity and power consumption and high spectral efficiency and can be met by multidimensional optimization. This paper proposes a Game Theory (GT) based suboptimal solution to this multidimensional optimization problem. The results obtained by computer simulations show that the proposed RRM algorithm brings significant improvement in what concerns the average delay and the throughput, compared to other RRM algorithms, at the expense of somewhat increased complexity.

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