CN117319991A - SIM (subscriber identity Module) over-the-air card writing method and system based on AT (access point) instruction - Google Patents
SIM (subscriber identity Module) over-the-air card writing method and system based on AT (access point) instruction Download PDFInfo
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- CN117319991A CN117319991A CN202311263191.6A CN202311263191A CN117319991A CN 117319991 A CN117319991 A CN 117319991A CN 202311263191 A CN202311263191 A CN 202311263191A CN 117319991 A CN117319991 A CN 117319991A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/20—Transfer of user or subscriber data
- H04W8/205—Transfer to or from user equipment or user record carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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Abstract
The application discloses a SIM card air writing method and system based on AT instruction, reading data in the SIM card through a card writing tool, sending a card writing request to an air writing platform, checking card writing authority by the air writing platform according to the card writing request, assembling personalized data into AT instruction, sending the AT instruction assembled with the personalized data to a communication module through the card writing tool by a client, analyzing the AT instruction assembled with the personalized data by a baseband chip of the communication module, sending a PP Down short message to the SIM card, and finishing card data change by a COS system of the SIM card. The method adopts the AT instruction as the carrier, realizes interaction of the SIM and the empty writing platform, realizes SIM writing work of the equipment by externally connecting a writing tool, and solves the problem that the existing empty writing work needs to rely on a cellular network, and the problem that the process of the empty writing work needs equipment to be electrified and the SIM card needs to finish card opening operation.
Description
Technical Field
The application relates to the technical field of aerial card writing, in particular to an AT instruction-based SIM aerial card writing method and system.
Background
The SIM (SubscriberIdentityModule) card is an IC card held by a mobile subscriber of the GSM system (Global System forMobile Communications ), called a subscriber identity card, which identifies the GSM subscriber by means of a SIM card. Devices based on cellular communications (e.g., GSM handsets) and intelligent internet of things devices based on NB, 4G and 5G communications can only be used on the network after insertion of a SIM card.
The SIM card mainly completes the following two functions: storing data (controlling access to various data) and completing the whole process of customer identity authentication and customer information encryption algorithm under the security condition (personal identification number PIN, authentication key Ki are correct). These two functions are mainly performed by a microprocessor with an operating system in the SIM card, the microprocessor having a chip with eight contacts which are interconnected with the mobile station device after power is applied to the card insertion device. At this point, the operating system and instruction set may provide intelligent features for the SIM.
The logical structure of the intelligent feature of the SIM card is a tree structure. All characteristic parameter information is expressed in a data field mode. Namely, three application directories are arranged under the root directory, one application directory belongs to the application directory of the administrative department, and the two application directories belong to the application directory of the technical management, namely a GSM application directory and a telecom application directory. All the directories are data fields, and binary and formatted data fields exist. The information in the data field is persistent, i.e. cannot be updated, and is temporary, and needs to be updated. Each data field expresses its purpose, degree of update, nature of the data field (e.g., identifier), whether the type is binary or formatted, etc.
The SIM card stores, in addition to normal data fields, non-file fields such as authentication keys, personal identification numbers, and personal unlocking codes.
The Over-the-air SIM card (Over-the-Air SIM Provisioning) is characterized in that a special SIM card is used as a carrier, and the personalized data Over-the-air (OTA) of the SIM card is realized through a data channel which is encrypted safely by using a wired or wireless network as a medium, so that the personalized data is written into the SIM card. The personalized data is written into the SIM card for accessing the SIM card to the network and authenticating functions. For example: ICCID-integrated circuit card identification code, namely SIM card number, imsi-International Mobile identification code, K-4G authentication parameter, PIN-personal identification code, etc. In the production process of the SIM card, the SIM seed card with the preset temporary code number is directly used for unified production, and then the SIM seed card is replaced by the required code number in a remote card writing mode when the terminal is used, so that the SIM card supply period is shortened, unified stock management is convenient, and the problems of resource occupation, large card preparation amount, incapability of meeting the card issuing flows such as remote card repairing requirements and the like are solved.
Currently, the prior art basically writes personalization data to the SIM card by two methods:
1. writing personalized data in the SIM card production process;
referring to fig. 1, the method writes personalized data into the SIM card by the SIM card manufacturer along with the card COS system in a production line, and specifically comprises the following steps:
step 1: preparing a personalized data file, typically a batch of card data in units of rows;
step 2: the special equipment for manufacturing the card reads the content of the personalized data file and writes the content into the SIM card through the APDU instruction.
The method has high efficiency and high success rate in the large-scale production process. However, the problem that the code number resources are occupied from the production of the SIM card, the sales of the SIM card and the production of the equipment to the sales of the equipment exists, and the problem that the code number resources are wasted due to the fact that the equipment is not used online finally exists, the problem that the card is saved in a cross-saving mode in the production and sales process is difficult to solve technically, and the requirement that the SIM card is written after being mounted to the equipment cannot be met due to the complex technical scheme.
2. Writing in personalized data through short messages or BIPs;
referring to fig. 2, the over-the-air card writing is a card writing method for data transmission based on the cellular network of the terminal itself. According to the transmission mode of the writing card data, the writing card data can be generally divided into a short message writing card and a BIP writing card.
Taking BIP writing card as an example, the flow is approximately as follows:
step 1: the communication module accesses the SIM instruction, completes access authentication with the base station/core network, and accesses the cellular network;
step 2: triggering a card writing process (such as automatic triggering of starting up, triggering of equipment instructions and triggering of platform instructions);
step 3: the SIM initiates a first channel opening application, establishes TCP/UDP connection with the empty writing platform, reports the card information, and the empty writing platform inquires that a card writing task exists, issues a card writing command and closes the connection after interaction is completed;
step 4: executing the card data change APDU instruction by the SIM and restarting;
step 5: and initiating a second channel opening application, establishing TCP/UDP connection with the empty writing platform, reporting the card information and the feedback of the writing card, and closing the connection after interaction is completed.
Although the method meets the requirement of writing the card after the first production, the card writing process needs to be carried out by means of the cellular network environment of the terminal, and the aerial card writing requires that the terminal can access the cellular network before the card writing, so that temporary code numbers are needed to exist and are already opened, and if a short message writing card is used, a short message function is also needed to be opened; meanwhile, as the mobile equipment is influenced by factors such as electric energy and signals, the card writing process is uncontrollable, the failure rate is high and the time is long.
Disclosure of Invention
Therefore, the application provides an AT instruction-based SIM (subscriber identity Module) air card writing method and system, which are used for solving the problems that in the prior art, the air card writing causes code number resource waste, a cellular network is needed to be relied on, equipment is needed to be powered on, and the SIM card needs to be opened.
In order to achieve the above object, the present application provides the following technical solutions:
in a first aspect, a SIM over-the-air card writing method based on AT instructions includes:
step 1: reading data in the SIM card by a card writing tool, and sending a card writing request to an empty writing platform; the blank writing platform verifies the card writing authority according to the card writing request and assembles personalized data into an AT instruction;
step 2: receiving an AT instruction assembled with personalized data and issued by the empty writing platform;
step 3: sending the AT instruction assembled with the personalized data to a communication module of the equipment through the card writing tool; the baseband chip of the communication module analyzes and sets an AT instruction with personalized data, and sends a PP Down short message to the SIM card, and a COS system of the SIM card completes card data change;
step 4: receiving an AT instruction of the SIM card, which is returned by the communication module and the card writing tool and is provided with a card writing result; the card writing result is an encrypted data segment;
step 5: and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to a preset key, and judging whether the card writing is successful or not.
Preferably, in the step 1, the empty writing platform performs verification through identity authentication according to the card writing request when verifying the card writing authority.
Preferably, in the step 1, the format when the personalized data is assembled into the AT command is as follows: client communication protocol { AT instruction { SIM card instruction }.
Preferably, in the step 2, when the empty writing platform issues an AT instruction assembled with the personalized data, the AT instruction is returned or issued asynchronously through the card writing request.
Preferably, in the step 4, the card writing result is fed back by the SIM card through SMS-delivery-REPORT.
In a second aspect, a SIM over-the-air card writing system based on AT instructions includes:
the Internet is used for connecting the client and the blank writing platform;
the card writing tool is used for connecting the client and the communication module of the equipment;
the client is used for reading the data in the SIM card through the card writing tool and sending a card writing request to the empty writing platform;
the blank writing platform is used for checking the card writing authority according to the card writing request sent by the client, assembling the personalized data into an AT instruction and sending the AT instruction to the client;
the client also comprises a communication module used for receiving the AT instruction assembled with the personalized data and issued by the blank writing platform and sending the AT instruction assembled with the personalized data to the equipment through the card writing tool;
the communication module is used for analyzing and assembling an AT instruction with personalized data through the baseband chip, sending a PP Down short message to the SIM card, and finishing card data change by a COS system of the SIM card;
the client also comprises an AT instruction for receiving the card writing result assembled by the SIM card returned by the communication module and the card writing tool;
and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to the preset key, and judging whether the card writing is successful or not.
Preferably, the card writing tool is connected with the communication module through an external pin, a circuit board pin header or infrared equipment.
Preferably, the card writing tool is connected with the client through a USB, bluetooth or Ethernet port.
Compared with the prior art, the application has the following beneficial effects:
the application provides a SIM (subscriber identity Module) air card writing method and system based on AT (access point) instructions, which are characterized in that data in a SIM card is read through a card writing tool, a card writing request is sent to an air writing platform, the air writing platform checks card writing authority according to the card writing request, personalized data are assembled into the AT instructions, the AT instructions assembled with the personalized data are sent to a communication module of equipment through the card writing tool by a client, the AT instructions assembled with the personalized data are analyzed by a baseband chip of the communication module, a PP (personal short message) is sent to the SIM card, and a COS (service operation) system of the SIM card completes card data change. The method adopts the AT instruction as the carrier, realizes interaction of the SIM and the empty writing platform, realizes SIM writing work of the equipment by externally connecting a card writing tool, solves the problem that the existing air card writing process needs to rely on a cellular network, solves the problem that the equipment needs to be electrified and the SIM card needs to finish card opening operation to be carried out in the air card writing process, reduces code number resource waste and improves the success rate of the air card writing.
Drawings
For a more visual illustration of the prior art and the present application, several exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).
FIG. 1 is a schematic diagram of a conventional SIM card production process for writing personalized data;
FIG. 2 is a schematic diagram of a conventional structure for writing personalized data via a SMS or BIP;
fig. 3 is a flowchart of a SIM over-the-air card writing method based on an AT instruction according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of a SIM over-the-air card writing system based on AT instructions according to a second embodiment of the present application;
fig. 5 is a schematic diagram of a specific structure of a SIM over-the-air card writing system based on AT commands according to a second embodiment of the present application.
Detailed Description
The present application is further described in detail below with reference to the attached drawings.
In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).
The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.
The AT, i.e. the Attention, instruction set of the AT is transmitted from the Terminal device (Terminal Equipment, TE) or the data Terminal device (Data Terminal Equipment, DTE) to the Terminal Adapter (TA) or the data circuit Terminal device (Data CircuitTerminal Equipment, DCE). An AT command is sent by the TA and the TE to control the Mobile Station (MS) to interact with the GSM network service.
The AT command is a character string with the AT as the head and the character ends, and the response data packet of the AT command is included. Each instruction returns a corresponding return if execution is successful or not. Other unexpected information (such as someone dialing in, no line signal, etc.), the module will have corresponding information prompts, and the receiving end can process correspondingly. The user can also control the aspects of calling, short messages, phonebook, data service, fax and the like through the AT instruction.
Example 1
Referring to fig. 3, in order to solve the problem that the existing air card writing needs to rely on a cellular network and the problem that the air card writing process needs to be powered on by a device and the SIM card needs to complete the card opening operation, the embodiment provides a SIM air card writing method based on AT instructions, which includes:
s1: reading data in the SIM card by a card writing tool, and sending a card writing request to an empty writing platform; the blank writing platform verifies the card writing authority according to the card writing request, and assembles the personalized data into an AT instruction;
specifically, because the blank writing needs to bind the SIM card information at the same time, the client is required to read the card information such as the SIM card number and the like, and the card information is matched with the formal code number and uploaded to the blank writing platform.
The blank writing platform checks the card writing authority after receiving the card writing request, and assembles the personalized data into an AT instruction after passing through the card writing authority, wherein the format is as follows: client communication protocol { AT instruction { SIM card instruction }. In order to better ensure the safety of the card writing process, the embodiment verifies the card writing request through the technologies such as identity authentication and the like, and realizes the management and control of a card writing operator.
S2: receiving an AT instruction assembled with personalized data and issued by an empty writing platform;
specifically, when the empty write platform issues an AT instruction assembled with personalized data to the client, the AT instruction can be returned along with a card writing request, or can be issued asynchronously.
S3: sending the AT instruction assembled with the personalized data to a communication module of the equipment through a card writing tool; the baseband chip of the communication module analyzes and sets an AT instruction with personalized data, and sends a PP Down short message to the SIM card, and a COS system of the SIM card completes card data change;
s4: receiving an AT instruction which is returned by the SIM card through the communication module and the card writing tool and is provided with a card writing result; the card writing result is an encrypted data segment;
specifically, after the writing of the SIM card is completed, the writing result is fed back to the baseband chip of the communication module by the SMS-delivery-REPORT mode, and the baseband chip of the communication module assembles the writing result into an AT command and returns the AT command to the client.
In the step, the card writing result value is an encrypted data segment, and the security of the data can be ensured in the baseband transparent transmission process after the card writing result is encrypted by a preset key.
S5: and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to a preset key, and judging whether the card writing is successful or not.
The personalized data writing problem after the delivery of the SIM card and before the network access is realized through the AT command writing card, and the technology can be widely applied in the to B scene and has higher value. For a more convenient understanding of its differences from the prior art, the present example is compared by means of a list, see in particular table 1.
TABLE 1
The SIM over-the-air card writing method based on the AT instruction provided by the embodiment can write personalized data AT any time after the equipment is produced. The method solves the problems that the production and stock period leads to the resource waste of the code number and the stock is unable to be carried out due to the attribution of the code number, does not depend on a cellular network, can complete personalized data writing without opening and powering up, and has the advantages of controllable process, high card writing success rate, short time consumption, high card writing efficiency, simple flow, convenient popularization and the like.
Example two
Referring to fig. 4 and 5, the present embodiment provides an AT instruction-based SIM over-the-air card writing system, which includes an over-the-air platform, the internet, a client, a card writing tool, a communication module and a SIM card, where the over-the-air platform provides card writing data and generates an AT instruction, and the client obtains an AT instruction message containing personalized data through the internet, and finally writes the AT instruction message into the SIM through the card writing tool and the communication module. The card writing operation is mostly carried out by the terminal manufacturer of the equipment of the Internet of things, during the production process of the equipment or before the departure.
The system comprises:
the Internet is used for connecting the client and the blank writing platform;
the card writing tool is used for connecting the client and the communication module of the equipment;
specifically, the card writing tool is connected with the communication module through an external pin, a circuit board pin or infrared equipment, and is connected with the client through a USB, bluetooth or Ethernet port.
The client is used for reading the data in the SIM card through the card writing tool and sending a card writing request to the empty writing platform;
the blank writing platform is used for checking the card writing authority according to the card writing request sent by the client, assembling the personalized data into an AT instruction and sending the AT instruction to the client;
the client also comprises a communication module used for receiving the AT instruction assembled with the personalized data and issued by the blank writing platform and sending the AT instruction assembled with the personalized data to the equipment through the card writing tool;
the communication module is used for analyzing and assembling an AT instruction with personalized data through the baseband chip, sending a PP Down short message to the SIM card, and finishing card data change by a COS system of the SIM card;
the client also comprises an AT instruction for receiving the card writing result assembled by the SIM card returned by the communication module and the card writing tool;
and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to the preset key, and judging whether the card writing is successful or not.
For specific limitations regarding the AT instruction-based SIM over-the-air card writing system, reference may be made to the above limitations regarding the AT instruction-based SIM over-the-air card writing method, and will not be described in detail herein.
Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.
The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.
Claims (8)
1. An AT instruction-based SIM over-the-air card writing method, comprising:
step 1: reading data in the SIM card by a card writing tool, and sending a card writing request to an empty writing platform; the blank writing platform verifies the card writing authority according to the card writing request and assembles personalized data into an AT instruction;
step 2: receiving an AT instruction assembled with personalized data and issued by the empty writing platform;
step 3: sending the AT instruction assembled with the personalized data to a communication module of the equipment through the card writing tool; the baseband chip of the communication module analyzes and sets an AT instruction with personalized data, and sends a PP Down short message to the SIM card, and a COS system of the SIM card completes card data change;
step 4: receiving an AT instruction of the SIM card, which is returned by the communication module and the card writing tool and is provided with a card writing result; the card writing result is an encrypted data segment;
step 5: and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to a preset key, and judging whether the card writing is successful or not.
2. The AT instruction-based SIM over-the-air card writing method according to claim 1, wherein in step 1, the over-the-air platform performs verification through identity authentication when the card writing authority is verified according to the card writing request.
3. The AT command-based SIM card over-the-air method according to claim 1, wherein in step 1, the format of the personalized data when assembled into the AT command is: client communication protocol { AT instruction { SIM card instruction }.
4. The AT command-based SIM over-the-air card writing method according to claim 1, wherein in step 2, when the AT command assembled with the personalized data is issued by the over-the-air platform, the AT command is returned or issued asynchronously through the card writing request.
5. The AT instruction-based SIM over-the-air card writing method according to claim 1, wherein in the step 4, the card writing result is fed back by the SIM card through SMS-delivery-REPORT.
6. An AT instruction based SIM over-the-air card writing system, comprising:
the Internet is used for connecting the client and the blank writing platform;
the card writing tool is used for connecting the client and the communication module of the equipment;
the client is used for reading the data in the SIM card through the card writing tool and sending a card writing request to the empty writing platform;
the blank writing platform is used for checking the card writing authority according to the card writing request sent by the client, assembling the personalized data into an AT instruction and sending the AT instruction to the client;
the client also comprises a communication module used for receiving the AT instruction assembled with the personalized data and issued by the blank writing platform and sending the AT instruction assembled with the personalized data to the equipment through the card writing tool;
the communication module is used for analyzing and assembling an AT instruction with personalized data through the baseband chip, sending a PP Down short message to the SIM card, and finishing card data change by a COS system of the SIM card;
the client also comprises an AT instruction for receiving the card writing result assembled by the SIM card returned by the communication module and the card writing tool;
and processing the AT instruction assembled with the card writing result, analyzing the card writing result according to the preset key, and judging whether the card writing is successful or not.
7. The AT instruction based SIM over the air card writing system of claim 6, wherein the card writing tool is connected to the communication module through an external pin, a circuit board pin header, or infrared equipment.
8. The AT instruction based SIM over the air card writing system of claim 6, wherein the card writing tool is connected to the client through a USB, bluetooth, or ethernet port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311263191.6A CN117319991A (en) | 2023-09-27 | 2023-09-27 | SIM (subscriber identity Module) over-the-air card writing method and system based on AT (access point) instruction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311263191.6A CN117319991A (en) | 2023-09-27 | 2023-09-27 | SIM (subscriber identity Module) over-the-air card writing method and system based on AT (access point) instruction |
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| CN117319991A true CN117319991A (en) | 2023-12-29 |
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| CN202311263191.6A Pending CN117319991A (en) | 2023-09-27 | 2023-09-27 | SIM (subscriber identity Module) over-the-air card writing method and system based on AT (access point) instruction |
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| CN (1) | CN117319991A (en) |
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