CN113419984B - Circuit for programming SIM card data on site of LTE (Long term evolution) equipment and implementation method - Google Patents
Circuit for programming SIM card data on site of LTE (Long term evolution) equipment and implementation method Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
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Abstract
A circuit implementation method for programming SIM card data on site for LTE equipment is characterized in that after a card writer plug is connected to a card writing interface XS1, a 5V output power supply of the card writer supplies power to a relay K1, a relay K2 and a power chip N2, the relay K1 and a relay K2 are electrified and attracted, so that a power supply pin VDD, a reset pin RST, a data pin IO and a clock pin CLK of a SIM chip N1 are disconnected from a main board and connected to the card writing interface XS1, namely IMSI and IMEI information of the SIM chip are written in through card writing software, and card writing operation is completed. The LTE equipment with the same model does not need to distinguish identity codes during production, storage, transportation and installation, and only writes the SIM card data of each equipment before formal use or the whole system is opened, thereby saving the production and management cost of the equipment, reducing the sorting workload in the processes of storage, transportation and installation and creating convenient conditions for the use and maintenance of subsequent equipment.
Description
Technical Field
The invention relates to a circuit of LTE (Long term evolution) equipment special for a subway, in particular to a circuit for burning SIM (subscriber identity module) card data on the spot of the LTE equipment for subway wireless communication and an implementation method.
Background
The modern subway wireless communication widely adopts private network communication based on an LTE network, can realize multimode wireless internet access, and realizes digital communication between mobile equipment and the ground.
When the LTE equipment is operated in a network, the LTE equipment needs to be provided with an SIM card indicating the identity of the LTE equipment, and each LTE equipment which leaves a factory at the present stage is generally provided with an SIM chip with written data.
International mobile subscriber identity in SIM cardIMSIThe International Mobile Subscriber Identity is different, so that a large number of identical LTE devices are provided with different SIM chips, and are distinguished in the processes of production, transportation and installation, that is, the devices are clearly identified, which brings a large workload in management, and because human factors are prone to errors, not only is an error easily caused, but also the corresponding devices are selected according to the identification for installation when the devices are transported to the site.
The LTE equipment installation is completed by equipment contractors or engineering units of a vehicle factory, management holes are easy to form, the equipment with the SIM cards cannot be installed in a number matching mode, errors are not easy to find, the problems are found in the subsequent debugging process, then, the core is removed, the SIM card number is removed, a large amount of work is brought to equipment replacement, the equipment is possibly returned to the factory to install a new SIM card again, and the construction period is prolonged and the engineering cost is increased.
The problem also can be brought in the later stage of product is used and is maintained, must open former equipment when changing equipment, takes out inside SIM chip, then opens the equipment that will change, installs the SIM chip of taking out again, and extravagant man-hour increases the maintenance cost.
These are all caused by the fact that the card cannot be rewritten after the pre-written SIM card is installed in the device, which brings inconvenience to production, transportation, installation, use, maintenance, and the like. Therefore, it is necessary to design a circuit and a corresponding device for writing the SIM card of the device on site, so that each device is loaded with the same SIM card without information written therein, before installation, each device is completely the same, which is convenient for production, transportation and management, and when the device is turned on, the corresponding SIM card information is written therein.
Disclosure of Invention
In view of the conditions and the defects of the prior art, the invention provides a circuit and an implementation method for burning SIM card data on site of LTE equipment, which can load the same empty SIM card (SIM card without writing any information) when each LTE equipment is produced, wherein before installation, each equipment is completely the same, thereby facilitating production, transportation and management, and when the equipment is opened, the corresponding SIM card information is written.
In order to achieve the purpose, the invention adopts the technical scheme that: a circuit for programming SIM card data on site for LTE equipment comprises the LTE equipment and a card writing circuit, wherein the card writing circuit comprises a relay switching circuit, an internal SIM card, a SIM card protection circuit, a card writing interface XS1 and a voltage-stabilized power supply circuit,
the card writing interface XS1 is connected with the internal SIM card sequentially through the relay switching circuit and the SIM card protection circuit, the card writing interface XS1 provides input voltage for a voltage stabilizing power supply, and the voltage stabilizing power supply circuit provides power for the relay switching circuit and the internal SIM card respectively;
the card writing circuit is arranged on a main board of the LTE equipment and connected with the main board, a hole is formed in the position, corresponding to the card writing interface XS1, of the shell of the LTE equipment, and the card writing interface XS1 is exposed.
The relay switching circuit comprises a relay K1 and a relay K2;
the SIM card protection circuit comprises a diode VD1, a diode VD2, a diode VD3, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and a capacitor C3;
the stabilized voltage power supply circuit comprises a stabilized voltage power supply chip N2;
the internal SIM card is an SIM chip N1;
the specific circuit connection is as follows:
one end of a resistor R1 is respectively connected with the cathode of a diode VD1 and a data pin IO of an SIM chip N1, the other end of the resistor R1 is respectively connected with one end of a capacitor C1 and the common end 3 pin of a relay K2, one end of a resistor R2 is connected with the cathode of a diode VD2 and a clock pin CLK of the SIM chip N1, the other end of a resistor R2 is connected with one end of the capacitor C2 and the common end 6 pin of the relay K2, the other ends of the capacitor C1 and the capacitor C2 and the anodes of the diode VD1 and the diode VD2 are respectively grounded, a coil pin 1 of the relay K1 and the coil pin 1 of the relay K2 are connected with a power supply 5V, a coil pin 8 is grounded, the diodes VD4 and VD5 are used as devices for eliminating the inverse peak voltage of the relay, the cathode and the anode of the diode VD4 are respectively connected with a coil pin 1 and a coil pin 8 of the relay K1, and the cathode and the anode of the diode VD5 are respectively connected with a coil pin 1 and a pin 8 pin of the relay K2;
a ground pin GND of a voltage-stabilizing power supply chip N2 is grounded, a power supply input pin of a voltage-stabilizing power supply chip N2 is connected with a power supply 5V, and filter capacitors C6 and C7 are connected between the ground and the ground in parallel, a power supply output pin of the voltage-stabilizing power supply chip N2 is connected with a normally-open contact 5 pin of a relay K1, a ground pin GND of an SIM chip N1 is grounded, a reset pin RST of the SIM chip N1 is connected with the cathode of a diode VD3 and one end of a resistor R3, the other end of the resistor R3 is connected with one end of a capacitor C3 and a common end 3 pin of the relay K1, the anode of the diode VD3 and the other end of the capacitor C3 are grounded, a power supply pin VDD of the SIM chip N1 is connected with a common end 6 pin of the relay K1, and filter capacitors C4 and C5 are connected between the ground in parallel;
pins 1 and 5 of the card writing interface XS1 are grounded, pin 2 is connected with pin 4 of a normally open contact of the relay K1, pins 3 and 4 are respectively connected with pin 5 and pin 4 of the normally open contact of the relay K2, and pin 6 is connected with a power supply 5V;
the 2 pin of the relay K1 is connected with the RST _ M end of the SIM reading circuit of the LTE equipment main board, the 7 pin of the relay K2 is connected with the CLK _ M end of the SIM reading circuit of the LTE equipment main board, and the 2 pin of the relay K2 is connected with the I/O _ M end of the SIM reading circuit of the LTE equipment main board.
A circuit implementation method for programming SIM card data on the site of LTE equipment comprises the following steps: after the card writer plug is connected to the card writing interface XS1, a 5V output power supply of the card writer supplies power to the relay K1, the relay K2 and the power chip N2, the relay K1 and the relay K2 are electrified and attracted, a power supply pin VDD, a reset pin RST, a data pin IO and a clock pin CLK of the SIM chip N1 are separated from a mainboard and connected to the card writing interface XS1, IMSI and IMEI information of the SIM chip are written through card writing software, and card writing operation is completed.
The invention has the following effects:
the invention is used in a special LTE communication system for subways, solves the problem of writing in the SIM card data of LTE equipment on site, and uses the circuit and the implementation method for writing in the SIM card data of the LTE equipment on site.
By using the circuit for programming the SIM card data on site, the equipment for loading the SIM card does not need to be distinguished, the problem that the SIM card is not checked is solved, the equipment does not need to be selected in the process of equipment installation, and the labor cost is saved.
The SIM card number is determined according to the installation position of the equipment, and the SIM card can be written into the SIM chip before the equipment is debugged and operated no matter whether the equipment has a power-on condition or not, so that the equipment is safe and reliable. And the SIM card information can be conveniently reconfigured according to the requirement in the later normal operation process of the equipment.
Drawings
FIG. 1 is a block diagram of the circuit connections of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
As shown in FIG. 1, the circuit for burning SIM card data in field for LTE equipment comprises the LTE equipment and a card writing circuit, wherein the card writing circuit comprises a relay switching circuit, an internal SIM card, a SIM card protection circuit, a card writing interface XS1 and a voltage-stabilized power supply circuit,
the card writing interface XS1 is connected with the internal SIM card sequentially through the relay switching circuit and the SIM card protection circuit, the card writing interface XS1 provides input voltage for a voltage stabilizing power supply, and the voltage stabilizing power supply circuit provides power for the relay switching circuit and the internal SIM card respectively;
the card writing circuit is arranged on the LTE equipment mainboard and connected with the mainboard, a hole is formed in the LTE equipment shell corresponding to the card writing circuit, and the card writing interface XS1 is exposed, so that card writing on site is facilitated.
As shown in fig. 2, a circuit for burning SIM card data in the field of an LTE device, the relay switching circuit includes a relay K1 and a relay K2;
the SIM card protection circuit comprises a diode VD1, a diode VD2, a diode VD3, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and a capacitor C3;
the stabilized voltage power supply circuit comprises a stabilized voltage power supply chip N2;
the internal SIM card is a SIM chip N1;
the specific circuit connection is as follows:
one end of a resistor R1 is respectively connected with the cathode of a diode VD1 and the 3 pin of an SIM chip N1, the other end of the resistor R1 is respectively connected with one end of a capacitor C1 and the 3 pin of a relay K2, one end of a resistor R2 is respectively connected with the cathode of a diode VD2 and the 6 pin of the SIM chip N1, the other end of a resistor R2 is respectively connected with one end of a capacitor C2 and the 6 pin of the relay K2, the other ends of the capacitor C1 and the capacitor C2 and the anodes of the diode VD1 and the diode VD2 are respectively grounded, the anode of a diode VD5 is connected with the 8 pin of a relay K2 and the ground, and the cathodes are respectively connected with the 1 pin of the relay K2 and a power supply 5V;
a pin 1 of a voltage-stabilizing power chip N2 is respectively connected with one end of a capacitor C6 and one end of a capacitor C7 and the ground, a pin 2 is connected with a pin 5 of a relay K1, a pin 3 is connected with the other end of the capacitor C6, the other end of the capacitor C7 and a power supply 5V, a pin 1 of an SIM chip N1 is grounded, a pin 7 of the SIM chip N1 is respectively connected with the cathode of a diode VD3 and one end of a resistor R3, the other end of the resistor R3 is respectively connected with one end of a capacitor C3 and the pin 3 of the relay K1, the anode of the diode VD3 and the other end of the capacitor C3 are grounded, a pin 8 of the SIM chip N1 is connected with the capacitor C4, one end of the capacitor C5 and the pin 6 of the relay K1, the other ends of the capacitor C4 and the capacitor C5 are grounded, the anode of the diode VD4 is connected with the pin 8 of a relay K1 and the ground, and the cathode is respectively connected with a pin 1 of the relay K1 and the power supply 5V;
pins 1 and 5 of the card writing interface XS1 are grounded, pin 2 is connected with pin 4 of the relay K1, pin 3 is connected with pin 5 of the relay K2, pin 4 is connected with pin 4 of the relay K2, and pin 6 is connected with a power supply 5V;
pin 2 of the relay K1 is connected with the RST _ M terminal of the SIM reading circuit of the LTE device motherboard,
pin 7 of the relay K2 is connected with the CLK _ M terminal of the SIM reading circuit of the LTE device motherboard,
and a pin 2 of the relay K2 is connected with an I/O _ M end of a SIM reading circuit of a mainboard of the LTE device.
The model of the voltage-stabilizing power supply chip N2 is as follows: LM1117-3.3V, the model number of SIM chip N1 is: FM 151M.
A circuit implementation method for programming SIM card data on site for LTE equipment is characterized in that a card writing circuit enables a SIM card to be switched between a card writing interface XS1 and a mainboard through a relay K1 and a relay K2.
When the card writer plug is not connected to the card writing interface XS1, the coils of the relay K1 and the relay K2 are not powered on and do not attract each other, the 3 pin and the 6 pin of the public end are respectively connected with the 2 pin and the 7 pin of the normally closed contact, the power supply pin VDD, the reset pin RST, the clock pin CLK and the data pin IO of the SIM chip N1 are connected with the mainboard, and the mainboard is ensured to read information from the SIM chip N1 and work normally;
when a card is required to be written, the card writer plug is connected to a card writing interface XS1, a 5V output power supply of the card writer supplies power to a relay K1, a relay K2 and a power chip N2, due to the fact that a coil is powered on, the relay K1 and the relay K2 are attracted, a common end pin 3 and a common end pin 6 of the relay K1 and the relay K2 are respectively connected with a normally open contact pin 4 and a normally open contact pin 5, a power supply pin VDD, a reset pin RST, a clock pin CLK and a data pin IO of the SIM chip N1 are disconnected with a main board and are connected with a card writing socket, namely information such as IMSI and IMEI of the SIM chip can be written in through card writing software, card writing operation is completed, and the SIM chip N1 is equivalent to completely disconnecting physical connection with the main board, so that the card writing process is not influenced by the main board circuit and the main board circuit is not interfered.
The specific implementation case takes the installation of LTE equipment of a certain subway line in Hangzhou as an example, the SIM card installed inside the LTE equipment used by the line is pre-written with information, but because the equipment integrator does not install the LTE equipment into a corresponding train according to the SIM card information, the problem is found only when the train is sent to the site, and in order to avoid the heavy workload of installing the LTE equipment into the corresponding train according to the number, the SIM cards of all the equipment are purchased from the equipment manufacturer, and all the installed SIM cards are replaced, so that the workload of disassembling and assembling the equipment is increased, the time for purchasing the SIM cards is increased, and the opening time of the line is delayed by more than 1 week compared with the planned time. The same LTE equipment is installed on a certain subway line in Western's Ann, and due to the adoption of the circuit and the method, the LTE equipment is very convenient and fast to open, all the LTE equipment does not need to be sorted and installed indifferently, the installation is successful at one time, the card writing time of each piece of LTE equipment is less than 2 minutes, compared with the situation that the SIM card is replaced on the subway line in Hangzhou province because the SIM card is not in number, and the installation and debugging time of each piece of equipment is saved by more than 30 minutes. When the subway system runs efficiently, a new line is opened, the fault detection and maintenance time of a subway operation and maintenance department is extremely limited, and the time for debugging equipment or processing faults needs to be scheduled and distributed, so that the quick opening and debugging are realized, and the quick fault processing is very important.
Claims (2)
1. A circuit for burning SIM card data on the spot of an LTE device comprises the LTE device and is characterized in that: the card writing circuit comprises a relay switching circuit, an internal SIM card, a SIM card protection circuit, a card writing interface XS1 and a voltage stabilizing power circuit;
the card writing interface XS1 is connected with the internal SIM card sequentially through the relay switching circuit and the SIM card protection circuit, the card writing interface XS1 provides input voltage for a voltage stabilizing power supply, and the voltage stabilizing power supply circuit provides power for the relay switching circuit and the internal SIM card respectively;
the card writing circuit is arranged on the LTE equipment mainboard and connected with the mainboard, a hole is formed in the position, corresponding to the card writing interface XS1, of the LTE equipment shell, and the card writing interface XS1 is exposed;
the relay switching circuit comprises a relay K1 and a relay K2;
the SIM card protection circuit comprises a diode VD1, a diode VD2, a diode VD3, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and a capacitor C3;
the stabilized voltage power supply circuit comprises a stabilized voltage power supply chip N2;
the internal SIM card is an SIM chip N1;
the specific circuit connection is as follows:
one end of a resistor R1 is respectively connected with the cathode of a diode VD1 and a data pin IO of an SIM chip N1, the other end of the resistor R1 is respectively connected with one end of a capacitor C1 and the common end 3 pin of a relay K2, one end of a resistor R2 is connected with the cathode of a diode VD2 and a clock pin CLK of the SIM chip N1, the other end of a resistor R2 is connected with one end of the capacitor C2 and the common end 6 pin of the relay K2, the other ends of the capacitor C1 and the capacitor C2 and the anodes of the diode VD1 and the diode VD2 are respectively grounded, a coil pin 1 of the relay K1 and the coil pin 1 of the relay K2 are connected with a power supply 5V, a coil pin 8 is grounded, the diodes VD4 and VD5 are used as devices for eliminating the inverse peak voltage of the relay, the cathode and the anode of the diode VD4 are respectively connected with a coil pin 1 and a coil pin 8 of the relay K1, and the cathode and the anode of the diode VD5 are respectively connected with a coil pin 1 and a pin 8 pin of the relay K2;
a ground pin GND of a voltage-stabilizing power supply chip N2 is grounded, a power supply input pin of a voltage-stabilizing power supply chip N2 is connected with a power supply 5V, and filter capacitors C6 and C7 are connected between the ground and the ground in parallel, a power supply output pin of the voltage-stabilizing power supply chip N2 is connected with a normally-open contact 5 pin of a relay K1, a ground pin GND of an SIM chip N1 is grounded, a reset pin RST of the SIM chip N1 is connected with the cathode of a diode VD3 and one end of a resistor R3, the other end of the resistor R3 is connected with one end of a capacitor C3 and a common end 3 pin of the relay K1, the anode of the diode VD3 and the other end of the capacitor C3 are grounded, a power supply pin VDD of the SIM chip N1 is connected with a common end 6 pin of the relay K1, and filter capacitors C4 and C5 are connected between the ground in parallel;
pins 1 and 5 of the card writing interface XS1 are grounded, pin 2 is connected with pin 4 of a normally open contact of the relay K1, pins 3 and 4 are respectively connected with pin 5 and pin 4 of the normally open contact of the relay K2, and pin 6 is connected with a power supply 5V;
the 2 pin of the relay K1 is connected with the RST _ M end of the SIM reading circuit of the LTE equipment main board, the 7 pin of the relay K2 is connected with the CLK _ M end of the SIM reading circuit of the LTE equipment main board, and the 2 pin of the relay K2 is connected with the I/O _ M end of the SIM reading circuit of the LTE equipment main board.
2. The method for realizing the circuit for burning the SIM card data in the field of the LTE device in the claim 1 is characterized by comprising the following steps: after the card writer plug is connected to the card writing interface XS1, a 5V output power supply of the card writer supplies power to the relay K1, the relay K2 and the power chip N2, the relay K1 and the relay K2 are electrified and attracted, a power supply pin VDD, a reset pin RST, a data pin IO and a clock pin CLK of the SIM chip N1 are separated from a mainboard and connected to the card writing interface XS1, IMSI and IMEI information of the SIM chip are written through card writing software, and card writing operation is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110978346.9A CN113419984B (en) | 2021-08-25 | 2021-08-25 | Circuit for programming SIM card data on site of LTE (Long term evolution) equipment and implementation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110978346.9A CN113419984B (en) | 2021-08-25 | 2021-08-25 | Circuit for programming SIM card data on site of LTE (Long term evolution) equipment and implementation method |
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| DE60238002D1 (en) * | 2002-08-12 | 2010-11-25 | Infotrust Inc | BATTERY SET WITH INTERFACE FOR TWO DIFFERENT CHIP CARDS |
| CN102695147B (en) * | 2012-05-28 | 2015-01-21 | 大唐微电子技术有限公司 | System and method for realizing data update of user SIM card |
| CN102711096B (en) * | 2012-05-30 | 2015-02-04 | 中国联合网络通信集团有限公司 | Method, device and terminal for card personalization over the air |
| US9699587B2 (en) * | 2013-03-01 | 2017-07-04 | General Motors Llc | Provisioning automotive SIM cards without removal from vehicle |
| CN104661211B (en) * | 2013-11-18 | 2018-07-06 | 成都鼎桥通信技术有限公司 | It is a kind of to automatically write the method for soft SIM information and terminal account-opening method in the terminal |
| CN204706026U (en) * | 2015-03-18 | 2015-10-14 | 华夏龙晖（北京）汽车电子科技股份有限公司 | A kind of program burn writing equipment of automobile electronic control unit |
| CN110225510A (en) * | 2019-06-11 | 2019-09-10 | 三星电子（中国）研发中心 | Method and apparatus for burning embedded SIM card |
| CN211718896U (en) * | 2020-03-27 | 2020-10-20 | 郑州信大捷安信息技术股份有限公司 | Burning and testing device for eSIM card |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2685984Y (en) * | 2004-02-02 | 2005-03-16 | 刘利民 | Non-contact smart card reading and writing device |
| CN112927437A (en) * | 2021-01-22 | 2021-06-08 | 四川杰斯顿电气设备有限公司 | Network card writer and card writing method thereof |
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Address after: 300456 room 506-11, building 1, Rongsheng Plaza, Binhai Zhongguancun Science Park, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee after: TIANJIN 712 MOBILE COMMUNICATIONS Co.,Ltd. Address before: No. 185, Xinda Road, Hebei District, Hebei District, Tianjin 300140 Patentee before: TIANJIN 712 MOBILE COMMUNICATIONS Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 300456 room 506-11, building 1, Rongsheng Plaza, Binhai Zhongguancun Science Park, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee after: Tianjin 712 Mobile Communication Co.,Ltd. Country or region after: China Address before: 300456 room 506-11, building 1, Rongsheng Plaza, Binhai Zhongguancun Science Park, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN 712 MOBILE COMMUNICATIONS Co.,Ltd. Country or region before: China |