CTCS-3 business oriented GSM-R fast handoff method

A technology of CTCS-3 and GSM-R, which is applied in the field of train communication, can solve the problems of frequent GSM-R cell handover, vehicle communication module switching, and fast train running speed, so as to reduce protection time and network overlapping coverage area, reducing the probability of communication interruption, and improving the handover success rate

Inactive Publication Date: 2010-07-14
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0005] However, in the CTCS-3 service, the train runs at a fast speed, and the GSM-R cell handover is frequent. Modules and network channel resources are in an extremely busy s

Method used

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  • CTCS-3 business oriented GSM-R fast handoff method
  • CTCS-3 business oriented GSM-R fast handoff method
  • CTCS-3 business oriented GSM-R fast handoff method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing pair and specific embodiment;

[0030] figure 1 Taking the single-network interleaved redundant coverage mode as an example, it shows the working principle of GSM-R handover when the train is running on the railway line covered by GSM-R. The train is currently under the coverage of cell A. There are 4 adjacent cells of cell A, namely cell B, cell C, cell D, and cell E.

[0031] Taking the train running in the upward direction as an example, when the train runs to a position near the switching critical point 1, the uplink and downlink level signals of the on-board communication module of the train will decrease, so the network will judge by the algorithm and switch it to the adjacent signal. A strong neighborhood.

[0032] According to the working principle of GSM-R and the actual running status of the train, the vehicle-mounted communication module can only be cut into cell ...

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Abstract

The invention discloses a CTCS-3 business oriented GSM-R fast handoff method, which relates to the technical field of train communication, and comprises the steps: firstly, determining the running direction of a train; defining two switch-in channels according to the running direction of the train, wherein one channel is a main channel, and the other channel is a standby channel; and selecting one of the main switch-in channel and the standby switch-in channel as a switch-in channel to achieve the switching, and implementing handoff switching by using the standby traditional PBGT algorithm when the running direction of the train can not be determined. The method omits the measurement and decision process of handoff switching, reduces the protection time required by the switching process and a network overlapping coverage area, saves network resources, greatly improves the switching success rate of a CTCS-3 mobile station when the train runs at a high speed, and also greatly reduces the communication interruption probability of CTCS-3 business.

Description

technical field [0001] The invention belongs to the technical field of train communication in a CTCS-3 train control system, and relates to a method for realizing CTCS-3 business-oriented GSM-R fast handover. Background technique [0002] In order to meet the needs of train speed increase and safe operation, and to meet the needs of different lines of graded transportation, my country has formulated the "China Train Control System CTCS (Chinese Train Control System) Development Plan". The development plan refers to the European Train Control System ETCS (European Train Control System) standard and combines the current situation and future development needs of China's train control system, and divides China's train control system into five levels from CTCS-0 to CTCS-4. Among them, CTCS-3 is suitable for trains with a speed of 300-350 kilometers per hour. CTCS-3 is a centralized train control system based on GSM-R transmission information. [0003] The GSM-R mobile communica...

Claims

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Application Information

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IPC IPC(8): H04W36/08
Inventor 蒋文怡钟章队朱刚丁建文武贵君
Owner BEIJING JIAOTONG UNIV
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