Vehicle-mounted Tbox off-network re-registration method

Abstract

The invention relates to a vehicle-mounted Tbox off-network re-registration method. In the Tbox, a vehicle terminal needs to be registered to a 4G core network and an IMS, and then voice and data functions required in a project can be met. The IMS registration state and the Data registration state of the Tbox terminal need to be monitored at any time, once the registration state changes, the application needs to be processed according to the step logic in the vehicle-mounted Tbox off-network re-registration method so as to start the Modem in the Tbox to restart and execute the resident network process, and after the network state recovers to be normal, the application can restart and execute the resident network process according to the step logic in the vehicle-mounted Tbox off-network re-registration method. And voice, data and short message services of the Tbox can also be used.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for re-registering when a vehicle-mounted Tbox loses the network. Background technique [0002] As we all know, a vehicle-mounted communication service terminal, also called a vehicle-mounted Tbox (TelematicsBOX, telematics processor, Tbox for short), is an important part of a remote data service for a vehicle at present. Tbox is a vehicle-mounted terminal device specially developed for electric vehicles. It can transmit vehicle battery information, vehicle fault information, load information, location information, driving speed, and alarm information to the monitoring center through the wireless communication network, so that the monitoring center can monitor the vehicle in real time. The position, speed, alarm and various states of the vehicle can be effectively realized to monitor, manage and diagnose the vehicle. [0003] Normally, when there is business data...

AI Technical Summary

Problems solved by technology

[0004] However, when Tbox encounters core network abnormality, ESIM card (Embedded-SIM, embedded SIM card) power supply abnormality, frequent network injection and offline abnormalities when it is at the edge of the cell, or when the base station is overloaded, the core network The connection with the Tbox will be disconnected. At this time, the communication module in the Tbox will no longer actively complete the LTE network, and as required, once the Tbox is installed on the car, it will only sleep and wake up according to the power state of the vehicle without Power off and restart (the Modem inside the Tbox will not restart to execute the process of staying on the network)

[0005] At the same time, Tbox has no interface or buttons for users to operate, which will cause TBOX to be permanently offline. Even if the network status returns to normal, Tbox’s voice, data and SMS services will not be available

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