CN112333797A - Intelligent switching system and method for terminal communication card operator based on eSIM technology - Google Patents
Intelligent switching system and method for terminal communication card operator based on eSIM technology Download PDFInfo
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- CN112333797A CN112333797A CN202011149227.4A CN202011149227A CN112333797A CN 112333797 A CN112333797 A CN 112333797A CN 202011149227 A CN202011149227 A CN 202011149227A CN 112333797 A CN112333797 A CN 112333797A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a system and a method for intelligently switching terminal communication card operators based on an eSIM technology, wherein the system comprises a metering automation terminal, a master station and a base station; the metering automation terminal comprises a clock module, a safety module, a remote communication module, a power supply module, a display module, an RS485 communication module, a carrier communication module, a 4KEYS (key system), an eSIM (embedded subscriber identity module) external circuit, a Universal Asynchronous Receiver Transmitter (UART), a Serial Peripheral Interface (SPI), an LCDC (local control direct current) interface, a GPIO (general purpose input/output) interface, an I2C interface and a PWM (pulse width modulation) interface; the metering automation terminal is connected with the base station through GPRS/CMDA and communicates with the master station through a power line private network. The embodiment provided by the invention has simple circuit design by adding the eSIM module, and can switch the communication card of the terminal to the operator card number with better network signals according to the intensity of the operator signals, thereby ensuring the reliability of the communication between the terminal and the main station.
Description
Technical Field
The invention relates to the field of communication, in particular to a system and a method for intelligently switching terminal communication card operators based on an eSIM technology.
Background
At present, the communication mode of the physical SIM card of a single operator is the main mode of the metering automation terminal, and if the problems of unstable network signals of the operator, poor contact of the SIM card, damage of the SIM card and the like exist, equipment can be directly disconnected. According to statistics, the problems of drop and instability of the metering automation terminal are more than 80% caused by poor network signals of operators. For an automatic metering terminal in a no-signal or unstable-signal environment, an existing processing mode is that operation and maintenance personnel go to a field and use equipment to test network signals of an operator, and then replace an operator SIM card with relatively good network signals. In fact, more than 50% of areas with poor field signals are remote areas, the labor cost for terminal disconnection processing caused by network signal problems of operators is extremely high, the efficiency is extremely low, and the data acquisition integrity rate of the metering automation system is influenced.
In order to solve the problem of terminal disconnection caused by poor network signals of operators, a communication switching device for an internet of things communication module, which comprises an SIM card switching component, a multi-path switching switch, a plurality of SIM card expansion slots, a logic chip and the like, is available at present, but if the communication switching device is integrated on a remote communication module of a terminal, the communication switching device occupies a large physical space, is complex to control and high in cost, and is not suitable for switching of operators of metering automatic terminal communication cards.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a system and a method for intelligently switching a terminal communication card operator based on an eSIM technology, adds an eSIM module on the basis of not expanding the original physical SIM card slot, has simple circuit design, and switches the communication card of a terminal to an operator card number with better network signals according to the strength of the operator signals.
In order to solve the technical problem, an embodiment of the present invention provides an intelligent switching system for a terminal communication card operator based on an eSIM technology, where the system includes an automatic metering terminal, a master station, and a base station; the metering automation terminal comprises a clock module, a safety module, a remote communication module, an eSIM module external circuit, a Universal Asynchronous Receiver Transmitter (UART), a Serial Peripheral Interface (SPI), a power module, a display module, an RS485 communication module, a carrier communication module, a 4KEYS, an LCDC interface, a GPIO interface, an I2C interface and a PWM interface; the metering automation terminal is connected with the base station through GPRS/CMDA and communicates with the master station through a power line private network.
The security module adopts a state secret security chip to ensure the security of terminal data.
The remote communication module is provided with an eSIM module and performs data interaction with a terminal through the UART.
The external circuit of eSIM module includes: the external circuit of the eSIM module mainly comprises an eSIM module, a switch chip, a physical SIM card slot and an eSIM patch; the eSIM module has the function of remotely writing the numbers of three operators, namely China Mobile, China telecom and China Unicom, and the eSIM supports the switching instruction of the aerial writing number.
The eSIM module, comprising: the GPIO pin is connected with a control pin of a switch chip, and the switch chip is provided with two channels, namely a channel A and a channel B; the channel A is connected with a physical SIM card slot circuit, the channel B is connected with an eSIM patch circuit, and the on-off of the channel A, B is controlled by controlling the high and low levels of pins, so that whether a physical SIM card or an eSIM patch is used is controlled.
The measurement automation terminal includes: the universal asynchronous receiving and transmitting transmitter UART is communicated with the carrier communication module and the RS485 communication module to acquire ammeter data; the power supply module provides electric energy for the metering automation terminal; the LCDC interface mainly realizes the function of interacting with the signal of the display module; the GPIO interface is connected with 4KEYS to realize signal interaction; the I2C interface and a clock module realize the interaction of clock signals, and PWM receives corresponding pulse modulation signals.
A method for intelligently switching terminal communication card operators based on an eSIM technology comprises the following steps: searching network signals of an existing SIM card operator and judging the strength of the network signals; the network signal of the existing SIM card is normal, and the condition that TCP logs in a master station server is confirmed; after the condition that TCP successfully logs in the master station server is triggered, the control logic for switching the card number is reset to an initial state.
The searching for the network signal of the current SIM card operator and the judging of the strength of the network signal comprise the following steps: when the terminal does not search the network signal of the existing SIM card operator, starting an interval switching program; after the interval switching program is started, the terminal sends an instruction for switching the SIM card number to the remote communication module, and the eSIM module in the remote communication module switches the SIM card number to the card number of any other operator; and the terminal searches and judges the switched operator network signal again, when the network signal cannot be searched, the interval switching program is continuously started, the SIM card number is switched to the card number of another operator until the SIM card number of the operator with better network signal is switched, and the process is ended.
The condition of confirming the TCP login to the master station server comprises the following steps: when the terminal can search the network signal of the existing SIM card operator but TCP fails to log in the main station server and TCP fails to log in the main station server twice discontinuously, waiting for about 20 seconds, and then TCP retries to log in the main station server; the terminal can search the network signal of the operator but TCP fails to log in the main station server, and when the TCP is judged to fail to log in the main station server twice continuously, an interval switching program is started to switch the SIM card number of the terminal once.
After the condition that the TCP successfully logs in the master station server is triggered, the logic for switching the card number is reset to an initial state, and the method comprises the following steps: and when the terminal does not successfully log in the master station server for 2 hours continuously, the terminal sends the dialing instruction to the remote communication module again and resets the logics of all the switching card numbers to the initial state.
The embodiment of the invention provides an intelligent switching system and method for terminal communication card operators based on an eSIM technology, which can realize the intelligent switching of SIM card numbers of three operators of China Mobile, China telecom and China Unicom through an interval switching program, has simple circuit design, is easy to integrate into a remote module, avoids the problems that SIM cards are replaced manually on site, the service is limited by operators and the like, and solves the problems of complex system, low stability and integration level and high manpower maintenance cost in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for intelligently switching terminal communication card operators based on an eSIM technology.
Fig. 2 is a schematic flow chart of a method for intelligently switching a terminal communication card operator based on an eSIM technology.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a system for intelligently switching terminal communication card operators based on an eSIM technology.
As shown in fig. 1, an intelligent switching system for a terminal communication card operator based on an eSIM technology includes a metering automation terminal 103, a master station 101, and a base station 102; the metering automation terminal 103 comprises a clock module, a safety module, a remote communication module, an eSIM external circuit, a Universal Asynchronous Receiver Transmitter (UART), a Serial Peripheral Interface (SPI), a power module, a display module, an RS485 communication module, a carrier communication module, 4KEYS, an LCDC interface, a GPIO interface, an I2C interface and a PWM interface; the metering automation terminal 103 is connected with the base station 102 through GPRS/CMDA and communicates with the master station 101 through a power line private network.
The security module adopts a state secret security chip to ensure the security of terminal data. The metering automation terminal 103 communicates with the security module through the SPI interface, and the security of the terminal data is ensured.
The remote communication module is provided with an eSIM module and performs data interaction with the terminal through a Universal Asynchronous Receiver Transmitter (UART).
The external circuit of eSIM module includes: the external circuit of the eSIM module mainly comprises an eSIM module, a switch chip, a physical SIM card slot and an eSIM patch; the eSIM module has the function of remotely writing the numbers of three operators, namely China Mobile, China telecom and China Unicom, and the eSIM supports the switching instruction of the aerial writing number.
The eSIM module, comprising: the GPIO pin is connected with a control pin of a switch chip, and the switch chip is provided with two channels, namely a channel A and a channel B; the channel A is connected with a physical SIM card slot circuit, the channel B is connected with an eSIM patch circuit, and the on-off of the channel A, B is controlled by controlling the high and low levels of pins, so that whether a physical SIM card or an eSIM patch is used is controlled. Typically, the default pin is in a low state. At low level, the switch chip turns on channel a and uses the physical SIM card. The card number of the SIM card is provided by three operators of China Mobile, China Unicom or China telecom.
When an external circuit of the eSIM module is powered on, firstly detecting whether a physical SIM card is accessed; if detecting that a physical SIM card is accessed, preferentially using the physical SIM card; if the physical SIM card cannot be detected to be connected, the GPIO pin of the eSIM module outputs high level, and the switch chip switches the channel A to the channel B, namely the eSIM card is used.
The metering automation terminal 103 comprises: the universal asynchronous receiving and transmitting transmitter UART is communicated with the carrier communication module and the RS485 communication module to acquire ammeter data; the power supply module provides electric energy for the metering automation terminal 103; the LCDC interface mainly realizes the function of interacting with the signal of the display module; the GPIO interface is connected with 4KEYS to realize signal interaction; the I2C interface and a clock module realize the interaction of clock signals, and PWM receives corresponding pulse modulation signals.
On the basis of not expanding the original SIM card slot, the eSIM module is added, the circuit design is simple, and the communication card of the terminal is switched to the operator card number with better network signals according to the intensity of the operator signals.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a method for intelligently switching a terminal communication card operator based on an eSIM technology.
As shown in fig. 2, a method for intelligently switching a terminal communication card operator based on an eSIM technology includes:
s201 searches for network signals of the current SIM card operator and determines the strength of the network signals.
S202, the network signal of the existing SIM card is normal, and the TCP is confirmed to log in the master station server.
S203, after the condition that the TCP logs in the master station of the server successfully is triggered, the logic for switching the card number is reset to be in an initial state.
S201 searches for network signals of the current SIM card operator and determines the strength of the network signals. And when the terminal does not search the network signal of the existing SIM card operator, starting an interval switching program. After the interval switching program is started, the terminal sends an instruction for switching the SIM card number to the remote communication module, and the eSIM module in the remote communication module switches the SIM card number to the card number of any other operator. And then, the terminal judges whether the switched operator network signal can be searched again, if the operator network signal can not be searched yet, the interval switching program is continuously started, the SIM card number is switched to the card number of another operator, and the like. And ending the process until the SIM card number of the operator with better network signal is switched. In order to reduce the operation of frequently switching the SIM card number, the switching time interval of the interval switching program is set to be a mode that the switching time interval is correspondingly increased along with the increase of the switching turn. In general, the switching time interval may be set to: the switching time interval of the 1 st to 3 rd rounds is 5 minutes, the switching time interval of the 4 th to 6 th rounds is 10 minutes, and the switching time interval of the 7 th round and the following rounds is 30 minutes. The mode that the switching interval time is increased along with the switching turns is very suitable for switching of three operators, and the operation of frequently switching the card number is effectively reduced.
S202, the network signal of the existing SIM card is normal, and the condition that TCP logs in the server of the main station is confirmed, which comprises the following steps: when the terminal can search the network signal of the existing SIM card operator but TCP fails to log in the main station server and TCP fails to log in the main station server twice discontinuously, waiting for about 20 seconds, and then TCP retries to log in the main station server; the terminal can search the network signal of the operator but TCP fails to log in the main station server, and when the TCP is judged to fail to log in the main station server twice continuously, an interval switching program is started to switch the SIM card number of the terminal once.
S203 after the condition that the TCP successfully logs in the master station server is triggered, the logic for switching the card number is reset to an initial state, and the method comprises the following steps: the logic of switching card numbers takes effect in parallel, and after the condition that TCP successfully logs in the master station server is met and triggered, the logic of switching card numbers is reset to be in an initial state. And when the terminal does not successfully log in the master station server for 2 hours continuously, the terminal sends the dialing instruction to the remote communication module again, and resets the logics of all the switching card numbers to an initial state, so that the TCP is prevented from logging in the master station server for too long time.
The embodiment of the invention provides an intelligent switching system and method for terminal communication card operators based on an eSIM technology, which can realize the intelligent switching of SIM card numbers of three operators of China Mobile, China telecom and China Unicom through an interval switching program, has simple circuit design, is easy to integrate into a remote module, avoids the problems that SIM cards are replaced manually on site, the service is limited by operators and the like, and solves the problems of complex system, low stability and integration level and high manpower maintenance cost in the prior art.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the system and the method for intelligently switching the terminal communication card operator based on the eSIM technology provided by the embodiment of the invention are described in detail, a specific embodiment is adopted in the system to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A system for intelligently switching terminal communication card operators based on an eSIM technology is characterized by comprising a metering automation terminal, a master station and a base station;
the metering automation terminal comprises a clock module, a safety module, a remote communication module, a power supply module, a display module, an RS485 communication module, a carrier communication module, an eSIM external circuit, a Universal Asynchronous Receiver Transmitter (UART), a Serial Peripheral Interface (SPI), an LCDC interface, a GPIO interface, an I2C interface and a PWM interface;
the metering automation terminal is connected with the base station through GPRS/CMDA and communicates with the master station through a power line private network.
2. The system according to claim 1, wherein the security module adopts a cryptographic security chip to ensure security of the metering automation terminal data.
3. The system according to claim 1, wherein the remote communication module is provided with an eSIM module, and the remote communication module performs data interaction with the metering automation terminal through the UART.
4. The system of claim 1, wherein the eSIM module external circuit comprises:
the external circuit of the eSIM module mainly comprises an eSIM module, a switch chip, a physical SIM card slot and an eSIM patch;
the eSIM module has the function of remotely writing the numbers of three operators, namely China Mobile, China telecom and China Unicom, and the eSIM supports the switching instruction of the aerial writing number.
5. The system of claim 4, wherein the eSIM module comprises:
the GPIO pin is connected with a control pin of a switch chip, and the switch chip is provided with two channels, namely a channel A and a channel B;
the channel A is connected with the physical SIM card slot circuit, the channel B is connected with the eSIM patch circuit, and the on-off of the channel A, B is controlled by controlling the high and low levels of the control pin, so that whether the physical SIM card or the eSIM patch is used is controlled.
6. The system of claim 1, wherein the metering automation terminal comprises:
the universal asynchronous receiving and transmitting transmitter UART is communicated with the carrier communication module and the RS485 communication module to acquire ammeter data;
the power supply module provides electric energy for the metering automation terminal;
the LCDC interface mainly realizes the function of interacting with the signal of the display module;
the GPIO interface is connected with the 4KEYS to realize signal interaction;
the I2C interface and the clock module realize the interaction of clock signals, and the PWM receives corresponding pulse modulation signals.
7. A method for intelligently switching terminal communication card operators based on an eSIM technology is characterized by comprising the following steps:
searching network signals of an existing SIM card operator of the terminal and judging the strength of the network signals;
the network signal of the existing SIM card is normal, and the condition that TCP logs in a master station server is confirmed;
after the condition that TCP successfully logs in the master station server is triggered, the control logic for switching the card number is reset to an initial state.
8. The system according to claim 7, wherein the searching for the network signal of the existing SIM card operator and determining the strength of the network signal comprise:
when the terminal does not search the network signal of the existing SIM card operator, starting an interval switching program;
after the interval switching program is started, the terminal sends an instruction for switching the SIM card number to the remote communication module, and the eSIM module in the remote communication module switches the SIM card number to the card number of any other operator;
and the terminal searches and judges the switched operator network signal again, if the network signal can not be searched, the interval switching program is continuously started, the SIM card number is switched to the card number of another operator until the SIM card number of the operator with better network signal is switched, and the process is ended.
9. The system of claim 7, wherein said acknowledging that the TCP logged on to the primary server comprises:
when the terminal can search the network signal of the existing SIM card operator but TCP fails to log in the main station server and TCP fails to log in the main station server twice discontinuously, waiting for about 20 seconds, and then TCP retries to log in the main station server;
the terminal can search the network signal of the operator but TCP fails to log in the main station server, and when the TCP is judged to fail to log in the main station server twice continuously, an interval switching program is started to switch the SIM card number of the terminal once.
10. The system of claim 7, wherein after the condition that the TCP successfully logs in the primary station server is triggered, the control logic for switching the card number resets to an initial state, and the method comprises:
and when the terminal does not successfully log in the master station server for 2 hours continuously, the terminal sends the dialing instruction to the remote communication module again and resets the logics of all the switching card numbers to the initial state.
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| CN112333797B (en) | 2023-04-25 |
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