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Multi-port network test platform and method for rail transit millimeter wave train-ground wireless communication system

A vehicle-to-ground wireless communication and multi-port network technology, which is applied in vehicle wireless communication services, wireless communication, data exchange networks, etc., can solve the problems of scattered data, inability to do centralized processing, and complicated operations

Pending Publication Date: 2020-09-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the network test platform for the wireless system of the maglev vehicle only supports one-to-one port access. If it is necessary to test multi-port services at the same time, the vehicle test unit and the ground test unit need to open multiple programs, and the operation is complicated and the data is scattered. do centralized processing

Method used

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  • Multi-port network test platform and method for rail transit millimeter wave train-ground wireless communication system
  • Multi-port network test platform and method for rail transit millimeter wave train-ground wireless communication system
  • Multi-port network test platform and method for rail transit millimeter wave train-ground wireless communication system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 , a multi-port network test platform for rail transit millimeter-wave vehicle-to-ground wireless communication system, including equipment: vehicle-mounted radio system test unit (1), vehicle-mounted radio control unit (2), vehicle-mounted wireless transceiver equipment A\B (3), channel Emulator (4), ground wireless transceiver equipment A\B (5), zone radio control unit (6), ground radio system test unit (7). In the laboratory test, the interface of the vehicle radio system test unit (1) is connected with the corresponding interface of the vehicle radio control unit (2); the ground radio system test unit (7) is connected with the corresponding interface of the interface of the partition radio control unit (6) . The channel emulator (4) is connected to the vehicle-mounted radio transceiver (3) and the partitioned radio transceiver (5) through a radio frequency cable, so as to simulate a 38G wireless channel during maglev operation. The vehicle-mounted radi...

Embodiment 2

[0031] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0032] see figure 2 , the port structure of the vehicle-mounted radio system test unit and the ground radio system test unit of the rail transit millimeter-wave vehicle-to-ground wireless communication system network test platform of the present invention is as follows figure 2shown. The on-vehicle radio test unit (1) and the ground radio test unit (4) are composed of 12 ports respectively: 4 RS485 ports for carrying train traction control system data, 4 RS232 ports for carrying train operation control system data, 4 The RJ45 port is used to carry passenger information / train operation / train diagnosis and other data. The RS232 port and RS485 port of the vehicle radio system test unit (1) are connected with the RS232 port and RS485 port of the vehicle radio control unit (2) through corresponding serial lines, and the RJ45 port of the vehicle radio system test unit (1) is ...

Embodiment 3

[0034] This embodiment is basically the same as the foregoing embodiment, and the special features are as follows:

[0035] The multi-port network testing method of the rail transit millimeter-wave vehicle-to-ground wireless communication system adopts the multi-port network test platform of the rail transit millimeter-wave vehicle-to-ground wireless communication system described in Embodiment 1 to operate, and is characterized in that the operation steps are as follows:

[0036] 1) The ground radio system test unit (7) sends a time synchronization signal to the vehicle radio system test unit (1) through the RJ45 port, and the vehicle radio system test unit (1) replies to the ground radio system test unit (7) after receiving the signal. A process is repeated several times to obtain the average time difference t1 between the ground radio test unit (7) and the vehicle radio system test unit (1);

[0037] 2) Multi-port service transmission is performed between the ground radio s...

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Abstract

The invention relates to a multi-port network test platform and method for a rail transit millimeter wave train-ground wireless communication system, and belongs to the field of rail transit communication. The system comprises a vehicle-mounted radio system test unit, a vehicle-mounted radio control unit, a vehicle-mounted wireless transceiver, a channel simulator, a ground wireless transceiver, apartition radio control unit and a ground radio system test unit. Before and after the service flow of each port is tested, the vehicle-mounted radio system test unit and the ground radio system testunit complete two times of time difference statistics through time synchronization signals sent by an RJ45 port, fits to obtain a linear function relationship between the time difference between thetwo ends and the timestamp, and finally completes statistics of the time delay and the packet loss rate of each port of the millimeter wave train-ground wireless communication system through the timestamp and the port number of each port receiving and sending data packets. According to the invention, the function and the performance of the millimeter wave train-ground wireless communication systemcan be effectively and comprehensively tested.

Description

technical field [0001] The invention relates to a multi-port network testing platform and method for a rail transit millimeter-wave vehicle-to-ground wireless communication system, belonging to the field of rail transit communication. Background technique [0002] The millimeter-wave communication business content between the ground and the train of the maglev train includes: traction control system data, operation control system data, passenger information, train operation, train diagnosis and value-added service information, etc. These services transmit data through different ports: traction control system data is transmitted through 4 RS485 ports, operation control system data is transmitted through 4 RS232 ports, passenger information, train operation and train diagnosis information is transmitted through 4 RJ45 ports. In order to test the performance of these communication channels, a multi-port network test platform is required. At present, the network test platform f...

Claims

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Application Information

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IPC IPC(8): H04W4/42H04W4/44H04W24/06H04L12/26
CPCH04W4/42H04W4/44H04W24/06H04L43/0852H04L43/0829
Inventor 郑国莘陈笑南李震昱
Owner SHANGHAI UNIV
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