Terminal state tracking method for CBTC (Communication Based Train Control System)

Abstract

The present invention provides a terminal state tracking method for a CBTC (Communication Based Train Control System). The method includes the following steps that: a vehicle-mounted terminal device is adopted as a user device to be tracked, the network element identification device identifier IMSI or TMSI of the vehicle-mounted device is associated with MME_UE_S1AP_ID, Cellid and UEID, a mapping table is maintained, the user device can be identified uniquely on a whole link, and terminal state tracking is supported; the mapping table is stored at a base station side, and the identification tag of a relevant network element identification device is added to terminal state information; and when the terminal state information is analyzed, tags are identified in a unified manner and filtered, and the state of the user device in an entire network can be obtained. With the terminal state tracking method of the invention adopted, efficiency can be improved during installation and debugging stages, terminal device states can be tracked in the operating process of trains, and problems can be quickly detected and located.

Description

technical field [0001] The invention belongs to the field of communication, and relates to a method for tracking the status of a client device based on LTE (Long Term Evolution, long-term evolution) for realizing CBTC (Communication Based Train Control System, communication-based automatic train control system). Background technique [0002] In order to combine with the mainstream communication system and have a larger communication bandwidth, the current CBTC system is increasingly adopting the LTE communication system. The wireless part of the entire CBTC system can be roughly divided into three network elements: core network (EPC, Evolved Packet Core network), base station (ENb, Evolved Node B) / cell (Cell), terminal equipment (CPE, Customer Premises Equipment), terminal equipment Responsible for system signal connection and data transmission and reception. Therefore, the communication status of the terminal is related to the running status of the train, and ensuring comm...

AI Technical Summary

Problems solved by technology

[0003] When there is an abnormality in the base station, such as the failure to establish a cell; or an abnormality in the terminal equipment, such as being abnormally deleted, etc., the conventional method is to grab the log information on the base station or equipment side to locate the problem. However, during the train operation, this method is obviously not possible. Yes, for example, it is very difficult to identify an abnormal terminal device in a large amount of data

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