Integrated Bearing System for Train-Ground Communication of Urban Rail Transit
The conventional train-ground communication of urban rail transit relies on trackside base stations for relaying,which leads to significant signal transmission delays.However,conventional communication systems are susceptible to base station failures and link interference,which impairs communication reliability and poses potential risks to traffic safety.Currently,the trackside equipment of urban rail transit mainly uses wired communication,which incurs high construction and maintenance costs.The train-ground communication of urban rail transit based on a wireless Ad-hoc network can effectively save network deployment costs.By building a wireless Ad-hoc network with the trackside equipment,train,and station aggregation nodes at the core to carry the data transmission of urban rail transit,the complexity of control and interfaces can be reduced,thus ensuring secure real-time train-train and train-ground communication.An integrated bearing system for train-train communication of urban rail transit based on a wireless Ad-hoc network was designed.Additionally,the urban rail transit environment was simulated in a laboratory environment by using equipment such as the wireless Ad-hoc network base station,channel simulator,and adjustable attenuator to verify the train-train communication capability.The test results indicate that the Ad-hoc system has the characteristics of self-organizing without center,low network delay,strong network robustness,and multi-hop transmission and it can meet the requirements of urban rail transit.
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