CN115942411A - A multi-card multi-mode communication system control method and device for a power collection terminal - Google Patents

Abstract

The present invention provides a multi-card multi-mode communication system control method and device for a power collection terminal, including: step 1, the collection terminal sends the collected data to a communication storage unit, and sets each communication card as A card, B card, C card, D card, and A card is the main card, and the other cards are backup cards; step 2, the communication control unit sends the stored data to the communication chip, and then the controller performs packet transmission according to the difference in communication performance of each card, and Assign the power information collected by the collection terminal to each communication card; step 3, judge whether there is a disconnection, if there is a disconnection, use the original card B as the main card to replace the original card A; step 5, when the system side monitors the When online, send a switch card command to the standby card to switch the main card. The present invention adopts multi-card synchronous operation mode, utilizes multi-card communication heartbeat time difference to judge communication performance and sends data packets separately, and backs up and sends key data through multi-card to realize faster and more stable data transmission.

Description

A multi-card multi-mode communication system control method and device for power collection terminal

Technical Field

The present invention relates to the technical field of power data collection, and more specifically, to a multi-card multi-mode communication system control method and device for a power collection terminal.

Background Art

With the continuous in-depth development of new power systems, the real-time requirements for electric energy collection are constantly increasing. In addition, with the application of new equipment such as hplc+hrf dual-mode modules and energy controllers, the requirements for real-time collection of electric energy data and real-time data upload are getting higher and higher, and the requirements for stable online collection terminals are also getting higher and higher. However, in actual applications, due to the power limit requirements of the terminal, once the terminal communication system encounters a bad signal, it cannot perform high-power signal search like a mobile phone to ensure the public network communication signal. It is often encountered that the collection terminal is short-term offline due to signal problems, causing large segments of data to be lost. When the data is lost, due to the single-card mode, when the master station is connected again, in order to ensure the normal execution of the collection task, there are not enough channel resources to retransmit the lost data. Retransmission of lost data will affect the upload of existing data packets. Therefore, in the existing single-card single-mode public network communication method of the collection terminal and the processing method of the collected data, it is easy to cause data loss due to the short-term offline of the terminal.

In addition, for the public network communication with the main station, the existing data collection terminal generally adopts a mode that when there is no reply to the sent data packet, the terminal sends three same data packets after a short delay. If there is no reply, no processing is performed, resulting in the loss of collected data. If a reply is received, it is assumed that all data has been sent. In actual use, partial or complete data packet loss is often encountered.

Prior art document 1 discloses a multi-channel switching method, device and storage medium for a wireless communication terminal, wherein the wireless communication terminal includes a wireless communication module, and the wireless communication module is provided with multiple SIM cards. The method includes: sending a heartbeat data packet to a master station server and/or a master station boundary gateway based on the network channel of the current SIM card, wherein the wireless communication module is connected to the master station server through the network channel and the master station boundary gateway; receiving a response data packet for the heartbeat data packet sent by the master station server and/or the master station boundary gateway; judging whether the response data packet meets the preset communication conditions; when the preset communication conditions are not met, switching the current SIM card to another SIM card. This method ensures the business continuity and stability of the wireless communication terminal, improves the access reliability of the industrial Internet of Things, and reduces the access delay. The defects of prior art document 1 include: the switching of the main and standby cards based on the preset threshold still exists, and according to the existing device mode, data loss may still occur during the switching, and there is still a clear distinction between the main and standby cards, and the standby card still maintains communication while the new channel created by the standby card cannot be better utilized.

Summary of the invention

In order to solve the deficiencies in the prior art, the present invention provides a multi-card multi-mode communication system control method for a power collection terminal, which can improve the online stability of the power collection terminal.

The present invention adopts the following technical solution.

A multi-card multi-mode communication system control method for a power collection terminal comprises the following steps:

Step 1, the acquisition terminal sends the acquired data to the communication storage unit, and sets the communication cards in the communication card unit as card A, card B, card C, and card D respectively, with card A as the main card and the remaining cards as standby cards;

Step 2, the communication control unit distributes the data in the communication storage unit to each communication card, and distributes the power information collected by the collection terminal to each communication card;

Step 3, setting the interval period for each communication card to send a heartbeat signal to the master station, and switching A, B, C, and D cards according to the round-trip duration of the heartbeat signal of each communication card;

Step 4, determine whether a disconnection occurs. If a disconnection occurs, the original card B is used as the main card to replace the original card A, and the data packets of the original card A are allocated to other communication cards in a proportion;

Step 5: When the master station system detects that the terminal is offline, it sends a card switching command to the B card, C card, and D card in sequence. If a card responds normally, the system will make a record change and switch it to the main card.

Preferably, in step 1, the acquisition terminal sends the collected data to the communication storage unit, and each communication card in the communication card unit sends a heartbeat request to the main station respectively. After receiving the reply frame of the main station, the time difference between the sending time and the reply time of the heartbeat request of each communication card and the number of intermediate routing nodes are calculated respectively, and the communication cards are set to A card, B card, C card, and D card respectively according to the time difference and the number of nodes, and the A card is the main card, and the other cards are standby cards;

The communication card is a SIM card. Multiple independent SIM cards are used in the terminal communication module. The number of communication cards used is 4, and each communication card uses the mobile, Unicom, Telecom or radio and television network respectively.

Preferably, in step 1, the communication cards are prioritized to be sorted from short to long according to the time difference between the sending time and the reply time of the heartbeat request, and the communication card with the shortest time difference is taken as the A card, and the remaining communication cards are sequentially taken as the B card, the C card and the D card; if the time difference between the sending time and the reply time of the heartbeat request of the communication card is the same, the number of intermediate routing nodes is taken as the second judgment criterion, and the communication card with a small number of nodes is preferentially selected as the A card, and so on.

Preferably, in step 2, the communication control unit sends the data in the communication storage unit to the communication chip, and then the controller performs packet transmission according to the communication performance difference of each card, and distributes the power information collected by the collection terminal to each communication card according to the time difference between the sending and replying of the heartbeat request of each communication card;

The number of allocated packets also includes:

The number of packets is distributed in the inverse proportion of t1:t2:t3:t4, and the number of packets n1:n2:n3:n4 satisfies:

Among them, t1, t2, t3, and t4 are the time differences between the heartbeat sending and replying of each card A, B, C, and D respectively; n1, n2, n3, and n4 are the power information allocated to each card A, B, C, and D respectively.

Preferably, in step 3, setting the interval period for each communication card to send a heartbeat signal to the master station also includes:

Card A performs online confirmation at a heartbeat frequency of once every 5 minutes. Card A sends a heartbeat signal to the main station once every 5 minutes and confirms whether there is a reply. Card B adds 5 minutes to Card A and performs online confirmation at a heartbeat frequency of once every 10 minutes. That is, Card B sends a heartbeat signal to the main station every 10 minutes and confirms whether there is a reply. Each subsequent card adds 5 minutes to the online confirmation frequency based on the previous card to confirm online.

Preferably, in step 4, if the master station does not respond within 60s after the communication card sends a signal, it is determined that a disconnection has occurred; when a disconnection occurs, that is, the master station does not respond within 60s, it switches to the original B card to receive the master station command, and uses the original B card as the main A card, and the other cards are promoted to the current position in turn to replace the original card, and the original A card is used as the new D card.

Preferably, in step 4, resending the data before and after the breakpoint further includes:

When the original A card is offline, the original B card is used as the new A card and the master station is reported to replace the card; if all cards cannot connect to the master station, all cards will re-login to the operator's base station, save the breakpoint data packet to the data acquisition terminal flash memory, and restart the data acquisition terminal;

After the signal is restored, that is, after each card has completed re-login to the base station, the new A card continues to ensure the communication function, and the B, C, and D cards are used to send supplementary data to the main station, that is, all the data collected in the adjacent period of the previously lost data packet to ensure data integrity;

When the supplementary data is sent, the power information is redistributed according to the ratio of the new time difference between the heartbeat signals sent and replied by the A, B, C, and D cards.

Preferably, in step 5, the master station system side monitoring the terminal offline also includes: when the main card fails to send a heartbeat signal for two consecutive cycles or the master station determines that the power information data packet is incomplete, it indicates that the terminal is offline.

Preferably, in step 5, when the main station system side monitors that the terminal is offline, a command to switch it to the main card is sent to card B. If card B responds normally, the system side changes the main and standby card records. If card B does not respond, commands are sent to card C and card D in sequence, and so on.

The present invention also provides a multi-card multi-mode communication system control device for a power collection terminal, comprising: a collection terminal, a communication storage unit, a communication control unit, a communication card unit and a master station;

The acquisition terminal is connected to the communication unit storage, and is responsible for collecting power data and storing the collected power data in the communication storage unit;

The number of communication cards in the communication card unit is set according to actual needs. Each communication card uses an independent SIM card of a different operator to achieve GSM/CDMA multi-mode execution. Each communication card is connected to the main station and can send heartbeat frames to the main station and receive heartbeat signals returned by the main station.

The communication control unit is used to select one of the communication cards in the communication card unit, set one of the communication cards as the main card to receive the control command of the master station, and use the other cards as standby cards;

The communication control unit is connected to the communication storage unit, and can send the power data in the communication storage unit in packets to each card for transmission. Only card A can accept the control command data issued by the main station of the user acquisition system.

The present invention also provides a terminal, including a processor and a storage medium;

The storage medium is used to store instructions;

The processor is used to operate according to the instructions to execute the steps of the multi-card multi-mode communication system control method of the power collection terminal.

The present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the multi-card multi-mode communication system control method of the power collection terminal are implemented.

The beneficial effect of the present invention is that, compared with the prior art, the present invention adopts a mode of multi-card multi-mode online and standby at the same time at the communication end, installs a maximum of the current four operators (China Mobile, China Unicom, China Telecom, and China Broadcasting) under one module, and can install at least two according to the local signal strength, and processes the terminal data transmission through multiple channels at the same time, dynamically adjusts the multi-card standby strategy, so that it is more suitable for the Internet of Things card traffic pool mode being promoted, improves the terminal online stability without increasing the communication cost, and enhances the terminal's data transmission capacity;

The present invention adopts a multi-card synchronous operation mode, through a multi-card simultaneous online method, uses the multi-card communication heartbeat time difference to judge the communication performance and send data packets respectively, and distributes and sends business data packets based on the communication performance calculation difference. At the same time, key data is backed up and sent through multiple cards, and two to more cards can be selected according to specific speed and stability requirements to achieve faster and more stable data transmission.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall flow of a multi-card multi-mode communication system control method for a power collection terminal in the present invention;

FIG. 2 is a schematic diagram of the structure of a multi-card multi-mode communication system control device for a power collection terminal in the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

As shown in FIG1 , the present invention provides a multi-card multi-mode communication system control method for a power collection terminal, the method specifically comprising the following steps:

Step 1, the acquisition terminal sends the collected data to the communication storage unit, and each communication card in the communication card unit sends a heartbeat request to the main station respectively. After receiving the reply frame from the main station, the time difference between the sending and replying of the heartbeat request of each communication card and the number of intermediate routing nodes are calculated respectively, and the communication cards are set to A card, B card, C card, and D card respectively according to the time difference and the number of nodes, and the A card is the main card, and the other cards are standby cards;

Since different communication operators use different communication frequency bands, such as the differences in communication frequencies used by China Mobile, China Unicom, and China Telecom, their connection stability and communication efficiency will be different under different meteorological conditions. At the same time, due to the differences in the construction density of base stations of various operators and the number of users of the same base station, the terminal signal performance intensity varies greatly at different locations and at different times. In the present invention, the communication card is a SIM card, and multiple independent SIM cards are used in the terminal communication module part. The number of communication cards used is at least 2, but not more than the total number of all available network operators. It can be understood that if two communication cards are used, they need to be set as A card and B card respectively. If three communication cards are used, they need to be set as A card, B card and C card respectively, that is, they are adjusted according to the actual number of communication cards.

There are currently four network operators, including China Mobile, China Unicom, China Telecom, and China Broadcasting. The number of communication cards can be increased as the number of network operators increases, such as when 230Mhz power is available. In the multi-card mode of the present invention, China Mobile, China Unicom, China Telecom or China Broadcasting networks are used respectively. By adopting multiple independent SIM cards with different wireless frequency bands, the "multi-mode multi-standby" mode can be executed in multiple available frequency bands and device modes, and multiple cards are kept online to ensure the online stability of the terminal.

Furthermore, the communication cards are prioritized to be sorted from short to long according to the time difference between the sending time and the reply time of the heartbeat request, and the communication card with the shortest time difference is taken as the A card, and the remaining communication cards are taken as the B card, the C card and the D card in turn; if the time difference between the sending time and the reply time of the heartbeat request of the communication card is the same, the number of intermediate routing nodes is taken as the second judgment criterion, and the communication card with a small number of nodes is preferentially selected as the A card, and so on.

Furthermore, card A is the main card, and the other cards are standby cards. The main card can receive control commands sent by the master station through the communication control unit, but the standby cards cannot.

Step 2: The communication control unit sends the data in the communication storage unit to the communication chip, and then the controller performs packet transmission according to the communication performance differences of each card, and distributes the power information collected by the collection terminal according to the time difference between the heartbeat request sending and replying of each communication card;

Among them, the power information collected by the collection terminal includes voltage, current, and electricity, etc., and the number of data packets stored in the communication storage unit according to the task and communication protocol combination;

Specifically, the power information is distributed in inverse proportion to the time difference between the heartbeat request sent and the reply of each communication card, and the time difference between the heartbeat request sent and the reply of each communication card and the distributed power information satisfies:

Among them, t1, t2, t3, and t4 are the time differences between the heartbeat sending and replying of each card A, B, C, and D respectively; n1, n2, n3, and n4 are the power information allocated to each card A, B, C, and D respectively.

Step 3, setting the interval period for each communication card to send a heartbeat signal to the master station, and switching A, B, C, and D cards according to the round-trip duration of the heartbeat signal of each communication card;

Specifically, setting the interval period for each communication card to send a heartbeat signal to the master station also includes:

Card A, as the main card, performs the main communication function of the current terminal and performs online confirmation at a heartbeat frequency of once every 5 minutes. Card A sends a heartbeat signal to the main station once every 5 minutes and confirms whether there is a reply. Card B adds 5 minutes to Card A and performs online confirmation at a heartbeat frequency of once every 10 minutes, that is, Card B sends a heartbeat signal to the main station every 10 minutes and confirms whether there is a reply. Each subsequent card adds 5 minutes to the previous card to perform online confirmation and confirms online;

By extending the interval between the standby card sending heartbeat frames to the master station, the purpose of saving traffic is achieved.

Further, A, B, C, and D cards are switched according to the duration of the heartbeat signals of each communication card being sent and returned, the round-trip duration of the heartbeat signals of each communication card is counted and compared with the round-trip duration of the most recent heartbeat signal of card A, and when the round-trip duration of the heartbeat signal of a communication card is less than the round-trip duration of the heartbeat frame of card A, the original A, B, C, and D cards are switched, that is, the sending and return duration of the heartbeat signals of each communication card are sorted from small to large, and according to the order of duration from small to large, each communication card is reset to card A, card B, card C, and card D in turn, and the communication card with the shortest sending and return duration of the heartbeat signal is always taken as card A.

Step 4, determine whether a disconnection occurs. If a disconnection occurs, the original card B is used as the main card to replace the original card A, and the other cards are promoted to replace the original card in turn, and the data packets of the original card A are set in proportion to be distributed to other communication cards;

的比例进行分配，t2、t3、t4分别为B、C、D各卡向主站进行心跳发送和回复的时间差，并将断点前后数据重新发送；If the master station does not respond within 60 seconds after the communication card sends the signal, it is judged that a disconnection occurs. When a disconnection occurs, that is, if the master station does not respond within 60 seconds, it switches to the original B card to receive the master station command, and the original B card is used as the main A card. The other cards are promoted to the current position to replace the original card in turn, and the original A card is used as the new D card. The original A card data packet is sent by other communication cards that can be connected according to

t2, t3, and t4 are the time differences between the heartbeat sending and reply of each card B, C, and D to the master station, and the data before and after the breakpoint are resent;

Specifically, resending the data before and after the breakpoint also includes:

When the original A card is offline, the original B card is used as the new A card and the master station is reported to replace the card; if all cards cannot connect to the master station, all cards will re-login to the operator's base station, save the breakpoint data packet to the data acquisition terminal flash memory, and restart the data acquisition terminal;

After the signal is restored, that is, after each card has completed re-login to the base station, the new A card continues to ensure the communication function, and the B, C, and D cards are used to send supplementary data to the main station, that is, all the data collected in the adjacent time period of the previously lost data packet to ensure data integrity.

比例分配新电力信息，此处n1、n2、n3、n4分别为A、B、C、D各卡新被分配的电力信息，t1、t2、t3、t4分别为新的A、B、C、D各卡心跳信号发送和回复的时间差。When the supplementary data is sent, each card will

New power information is distributed proportionally, where n1, n2, n3, and n4 are the newly distributed power information of cards A, B, C, and D, respectively, and t1, t2, t3, and t4 are the time differences between sending and replying the new heartbeat signals of cards A, B, C, and D, respectively.

Step 5, when the master station system monitors that the terminal is offline, it sends a card switching command to card B, card C, and card D in sequence. If a card responds normally, the system will record the change and switch the fastest responding card, i.e., the card with the shortest command message time, to card A. The other cards are arranged according to the response time of the card switching command.

Specifically, the terminal offline is also monitored by the master station system side: when the main card does not send a heartbeat signal for two consecutive cycles or the master station determines that the power information data packet is incomplete, such as there is a problem with the combined content, it indicates that the terminal is offline.

In the present invention, since the system side login uses IP information to locate the terminal, when the terminal sends information for the first time in step 1, the system binds multiple cards and terminal assets. When one of the multiple cards sends a heartbeat at a frequency of 5 minutes, it is defaulted to card A, and the others are defined as cards B, C, and D according to the sending time interval. Card A performs the general task issuing function by default, and the actively reported data comes from the combined data packet of cards A, B, C, and D, and the lost data is supplemented from cards B, C, and D.

When the master station system detects that the terminal is offline, it sends a command to switch the B card to the master card. If the B card responds normally, the system changes the master and backup card records. If the B card does not respond, it sends commands to the C card and the D card in sequence, and so on.

As shown in FIG2 , the present invention also provides a multi-card multi-mode communication device for a power collection terminal, and the above control method can be implemented based on the device. Specifically, the device includes: a collection terminal, a communication storage unit, a communication control unit, a communication card unit and a master station;

The acquisition terminal is connected to the communication unit storage, and is responsible for collecting power data and storing the collected power data in the communication storage unit;

The number of communication cards of the communication card unit can be set according to actual needs. In the present invention, four communication cards are preferably set, namely, communication card A, communication card B, communication card C, and communication card D; each communication card uses an independent SIM card of a different operator to achieve GSM/CDMA multi-mode execution, for example, SIM cards of operators such as China Mobile, China Unicom, China Telecom, and China Broadcasting and Television can be used, and each communication card is connected to the main station respectively, and can send a heartbeat frame to the main station and receive a heartbeat signal returned by the main station;

The communication control unit is used to select one of the communication cards in the communication card unit, set one of the communication cards as the main card to receive the control command of the master station, and use the other cards as standby cards;

The communication control unit is connected to the communication storage unit, and can send the power data in the communication storage unit in packets to each card for transmission. Only card A can accept the control command data issued by the main station of the procurement system, and card B accepts the control command issued by the procurement system for verification. After the data verification of cards A and B is correct, the terminal executes the control task. At this time, cards C and D are in standby status.

The beneficial effect of the present invention lies in that, compared with the prior art, the present invention adopts a multi-card synchronous operation mode, through a multi-card simultaneous online method, utilizes the multi-card communication heartbeat time difference to judge the communication performance and send data packets separately, and distributes and sends business data packets based on the communication performance calculation difference. At the same time, key data is backed up and sent through multiple cards, and two to more cards can be selected according to specific speed and stability requirements to achieve faster and more stable data transmission.

The present disclosure may be a system, a method and/or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing/processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and/or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and/or edge servers. The network adapter card or network interface in each computing/processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing/processing device.

The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

Various aspects of the present disclosure are described herein with reference to the flowcharts and/or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and/or block diagram and the combination of each box in the flowchart and/or block diagram can be implemented by computer-readable program instructions.

These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions/actions specified in one or more boxes in the flowchart and/or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and/or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions/actions specified in one or more boxes in the flowchart and/or block diagram.

Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions/actions specified in one or more boxes in the flowchart and/or block diagram.

The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and the part of the module, program segment or instruction contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and/or flow chart, and the combination of the square boxes in the block diagram and/or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of special hardware and computer instructions.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims (12)

1. A method for controlling a multi-card multi-mode communication system of a power collection terminal, characterized in that it comprises the following steps: Step 1, the acquisition terminal sends the acquired data to the communication storage unit, and sets the communication cards in the communication card unit as card A, card B, card C, and card D respectively, with card A as the main card and the remaining cards as standby cards; Step 2, the communication control unit distributes the data in the communication storage unit to each communication card, and distributes the power information collected by the collection terminal to each communication card; Step 3, setting the interval period for each communication card to send a heartbeat signal to the master station, and switching A, B, C, and D cards according to the round-trip duration of the heartbeat signal of each communication card; Step 4, determine whether a disconnection occurs. If a disconnection occurs, the original card B is used as the main card to replace the original card A, and the data packets of the original card A are allocated to other communication cards in a proportion; Step 5: When the master station system detects that the terminal is offline, it sends a card switching command to the B card, C card, and D card in sequence. If a card responds normally, the system will make a record change and switch it to the main card. 2. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In the step 1, the acquisition terminal sends the collected data to the communication storage unit, and each communication card in the communication card unit sends a heartbeat request to the main station respectively. After receiving the reply frame from the main station, the time difference between the sending time and the reply time of the heartbeat request of each communication card and the number of intermediate routing nodes are calculated respectively, and the communication cards are set to A card, B card, C card, and D card respectively according to the time difference and the number of nodes, and the A card is the main card, and the remaining cards are standby cards; The communication card is a SIM card. Multiple independent SIM cards are used in the terminal communication module. The number of communication cards used is 4, and each communication card uses the mobile, Unicom, Telecom or radio and television network respectively. 3. The multi-card multi-mode communication system control method of the power collection terminal according to claim 2, characterized in that: In the step 1, the communication cards are preferentially sorted from short to long according to the time difference between the sending time and the reply time of the heartbeat request, and the communication card with the shortest time difference is used as the A card, and the remaining communication cards are used as the B card, the C card and the D card in sequence; if the time difference between the sending time and the reply time of the heartbeat request of the communication card is the same, the number of intermediate routing nodes is used as the second judgment criterion, and the communication card with a small number of nodes is preferentially selected as the A card, and so on. 4. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 2, the communication control unit sends the data in the communication storage unit to the communication chip, and then the controller performs packet transmission according to the communication performance difference of each card, and distributes the power information collected by the collection terminal to each communication card according to the time difference between the sending and replying of the heartbeat request of each communication card; The number of allocated packets also includes: The number of packets is distributed in the inverse proportion of t1:t2:t3:t4, and the number of packets n1:n2:n3:n4 satisfies:

Among them, t1, t2, t3, and t4 are the time differences between the heartbeat sending and replying of each card A, B, C, and D respectively; n1, n2, n3, and n4 are the power information allocated to each card A, B, C, and D respectively. 5. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 3, setting the interval period for each communication card to send a heartbeat signal to the master station also includes: Card A performs online confirmation at a heartbeat frequency of once every 5 minutes. Card A sends a heartbeat signal to the main station once every 5 minutes and confirms whether there is a reply. Card B adds 5 minutes to Card A and performs online confirmation at a heartbeat frequency of once every 10 minutes. That is, Card B sends a heartbeat signal to the main station every 10 minutes and confirms whether there is a reply. Each subsequent card adds 5 minutes to the online confirmation frequency based on the previous card to confirm online. 6. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 4, if the master station does not respond within 60 seconds after the communication card sends the signal, it is determined that a disconnection has occurred; when a disconnection occurs, that is, if the master station does not respond within 60 seconds, it switches to the original B card to receive the master station command, and uses the original B card as the main A card. The other cards are promoted to the current position in turn to replace the original card, and the original A card is used as the new D card. 7. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 4, resending the data before and after the breakpoint also includes: When the original A card is offline, the original B card is used as the new A card and the master station is reported to replace the card; if all cards cannot connect to the master station, all cards will re-login to the operator's base station, save the breakpoint data packet to the data acquisition terminal flash memory, and restart the data acquisition terminal; After the signal is restored, that is, after each card has completed re-login to the base station, the new A card continues to ensure the communication function, and the B, C, and D cards are used to send supplementary data to the main station, that is, all the data collected in the adjacent period of the previously lost data packet to ensure data integrity; When the supplementary data is sent, the power information is redistributed according to the ratio of the new time difference between the heartbeat signals sent and replied by the A, B, C, and D cards. 8. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 5, the master station system side monitoring the terminal offline also includes: when the main card does not send a heartbeat signal for two consecutive cycles or the master station determines that the power information data packet is incomplete, it indicates that the terminal is offline. 9. The multi-card multi-mode communication system control method of the power collection terminal according to claim 1, characterized in that: In step 5, when the main station system monitors that the terminal is offline, a command to switch it to the main card is sent to card B. If card B responds normally, the system changes the main and standby card records. If card B does not respond, commands are sent to card C and card D in sequence, and so on. 10. A multi-card multi-mode communication system control device for a power collection terminal using the multi-card multi-mode communication system control method for a power collection terminal according to any one of claims 1 to 9, characterized in that it comprises: a collection terminal, a communication storage unit, a communication control unit, a communication card unit and a master station; The acquisition terminal is connected to the communication unit storage, and is responsible for collecting power data and storing the collected power data in the communication storage unit; The number of communication cards in the communication card unit is set according to actual needs. Each communication card uses an independent SIM card of a different operator to achieve GSM/CDMA multi-mode execution. Each communication card is connected to the main station and can send heartbeat frames to the main station and receive heartbeat signals returned by the main station. The communication control unit is used to select one of the communication cards in the communication card unit, set one of the communication cards as the main card to receive the control command of the master station, and use the other cards as standby cards; The communication control unit is connected to the communication storage unit, and can send the power data in the communication storage unit in packets to each card for transmission. Only card A can accept the control command data issued by the main station of the user acquisition system. 11. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1-9. 12. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

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