Circuit for on-site SIM card data programming by LTE equipment and implementation method

Abstract

A circuit implementation method for on-site SIM card data programming of LTE equipment comprises the steps that after a card writer plug is connected to a card writing interface XS1, a 5V output power supply of a card writer supplies power to a relay K1, a relay K2 and a power supply chip N2, the relay K1 and the relay K2 are powered on and attracted, and therefore a power supply pin VDD, a reset pin RST, a data pin IO and a clock pin CLK of an SIM chip N1 are separated from a mainboard and connected to the card writing interface XS1, and in other words, IMSI and IMEI information of the SIM chip is written in through card writing software, and card writing operation is completed. Identity codes do not need to be distinguished during production, storage and transportation and installation of LTE equipment of the same model, and SIM card data of each piece of equipment is written only during formal use or before the whole system is opened, so that the equipment production and management cost is saved, the sorting workload in the storage and transportation and installation process is reduced, and convenient conditions are created for subsequent equipment use and maintenance.

Description

technical field [0001] The invention relates to a special LTE equipment circuit for subways, in particular to a circuit and an implementation method for on-site programming of SIM card data for subway wireless communication LTE equipment. Background technique [0002] Modern subway wireless communication widely adopts private network communication based on LTE network, which can realize multi-mode wireless Internet access and realize digital communication between mobile devices and the ground. [0003] LTE devices must have a SIM card that indicates their "identity" when they are connected to the network. At this stage, each LTE device that leaves the factory is generally loaded with a SIM chip with written data. [0004] International Mobile Subscriber Identity number in the SIM card IMSI (International Mobile SubscriberIdentity) are different. In this way, a large number of the same LTE devices are equipped with different SIM chips, and must be distinguished in the proces...

AI Technical Summary

Problems solved by technology

[0004] International Mobile Subscriber Identity in the SIM card IMSI (International Mobile SubscriberIdentity) are different. In this way, a large number of identical LTE devices must be distinguished during the production, transportation, and installation processes because they are equipped with different SIM chips. That is, the devices must be clearly identified and managed It brings a lot of workload, and it is prone to errors due to human factors. Not only that, but when the equipment is transported to the site, it is necessary to select the corresponding equipment for installation according to the identification

[0005] The installation of LTE equipment is done by the equipment contractor or engineering unit of the vehicle factory. It is easy to form management loopholes, so that the equipment with the SIM card cannot be installed correctly, and the error is not easy to be found. If these problems are found in the subsequent debugging process, go to the Check the SIM card number. Replacing the device will bring a lot of work, which may cause the device to be returned to the factory to reinstall a new SIM card, resulting in delays in the construction period and increased project costs.

[0006] It will also cause problems in the later use and maintenance of the product. When replacing the device, it is necessary to open the original device, take out the internal SIM chip, then open the device to be replaced, and then install the removed SIM chip, which wastes man-hours and increases maintenance cost

[0007] These are all caused by the fact that the pre-written SIM card cannot be rewritten after it is loaded into the device, which brings a lot of inconvenience to production, transportation, installation, use, maintenance, etc.

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