A secure gateway system that aggregates IoT devices from multiple operators

Abstract

The present invention discloses a security gateway system that aggregates various IoT devices in multiple operators, the security gateway system includes: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device, the security gateway device integrates various communication protocols, the security gateway device is a ten-layer device, and the ten-layer device is an OS I ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OS I seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, the presentation layer, and the business application layer physically shield the IoT devices corresponding to the OS I seven-layer device. The present invention forms a ten-layer security gateway device by superimposing a session layer, a presentation layer, and a business application layer on an OS I seven-layer device, and then forms a security gateway system with the operator device and the IoT device, thereby realizing the integration of comprehensive deep interconnection and secure communication.

Description

Technical Field

[0001] The present invention relates to the field of secure communication technology, and in particular to a secure gateway system that aggregates Internet of Things devices from multiple operators. Background Art

[0002] With the continuous maturity of technology and the continuous improvement of enterprise informatization in recent years, the new generation of technology represented by the Internet has accelerated its penetration and integration into the manufacturing industry, energy industry, transportation industry, etc., promoting the one-way comprehensive interconnection of node data to the center. Nowadays, communication technology has been gradually improved, and there are endless forms of equipment access and data transmission modes, such as IoT and satellite communications. It has greatly promoted the connection between information systems, people, and even all links of the industrial chain and value chain, and added the wings of informatization to various industries. The expansion of communication modes naturally promotes the development of data nodes from comprehensive interconnection to deep interconnection, and cultivates new models and new formats such as flexible manufacturing, network manufacturing, green manufacturing, and service manufacturing in the manufacturing industry. Lay a solid foundation for Industry 4.0.

[0003] Judging from the current development of communication technology, communication is mainly based on two types: network ports, serial ports, satellite communications without external centers, and IoT low-bandwidth communications with centers. Existing technologies and products without centers are mostly single access modes, such as 232 serial ports, TCP / IP protocol stacks of network ports, satellite communications, etc. Centered technologies are centered on a certain platform, such as the IoT platform of China Telecom, China Mobile, and China Unicom, which access various low-bandwidth devices, or access other high-bandwidth devices through the operator center, but cannot access devices through serial ports, satellite communications, etc., and the center will encrypt and decrypt in sections, and the plaintext data will always be visible to the operator, and it cannot provide customers with reliable and controllable end-to-end encryption services. In addition, although the communication mode has been greatly expanded and secure access devices are emerging in an endless stream, there is currently no product on the market that combines the functions of comprehensive deep interconnection and secure communication.

[0004] Therefore, the prior art still needs to be improved and enhanced. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a security gateway device is provided for aggregating IoT devices from multiple operators, aiming to provide a solution to the problem that the security gateway device in the prior art cannot simultaneously achieve comprehensive deep interconnection and secure communication.

[0006] In a first aspect, the present invention provides a security gateway system for aggregating IoT devices from multiple operators, wherein the system includes: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device, wherein the security gateway device integrates various communication protocols, wherein the security gateway device is a ten-layer device, and the ten-layer device is an OSI ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OSI seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, presentation layer, and business application layer physically shield the IoT devices corresponding to the OSI seven-layer device.

[0007] In one implementation, the IoT devices include: TCP / IP devices, LOT devices, serial port devices, and satellite devices.

[0008] In one implementation, the IoT device establishes a secure communication link with the operator device, the operator device establishes a secure communication link with the security gateway device, and the operator device is an OSI layer 7 device.

[0009] In one implementation, the OSI seven-layer device includes: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.

[0010] In one implementation, when the IoT device is also a ten-layer device, the operator device acts as a switching device of the OSI ten-layer device, and forwards data of the eighth-layer session layer and the ninth-layer presentation layer of the OSI ten-layer device to the security gateway device.

[0011] In one implementation, when the IoT device uses the ninth layer presentation layer to establish a secure link with the security gateway device, all OSI seventh layer devices passed through act as seventh layer device switches to forward data to the security gateway device.

[0012] In a second aspect, an embodiment of the present invention further provides a communication method based on the above-mentioned security gateway system for aggregating IoT devices in multiple operators, the communication method comprising:

[0013] The IoT device and the security gateway device simultaneously authenticate the identity of the operator's device;

[0014] After the identity authentication is passed, a secure channel is established between the IoT device and the security gateway device, and a communication connection is established between the IoT device and the operator device based on a preset first communication protocol;

[0015] The IoT device sends a data message to the operator device, and the operator device decrypts the data message and sends it to the security gateway device through a preset second communication protocol;

[0016] After receiving the data message from the operator device, the security gateway device sequentially parses the sixth layer security protocol, seventh layer application data, eighth layer session protocol, ninth layer security protocol and tenth layer business application layer data, and forwards it to the intranet server.

[0017] In one implementation, the first communication protocol is LLVM or COAPS protocol; the second communication protocol is HTTPS protocol.

[0018] In a second aspect, an embodiment of the present invention further provides a security gateway device, which includes a memory, a processor, and a communication program stored in the memory and executable on the processor. When the processor executes the communication program, the steps of the communication method of any one of the above-mentioned schemes are implemented.

[0019] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein a communication program is stored on the computer-readable storage medium, and when the communication program is executed by a processor, the steps of the communication method described in any one of the above schemes are implemented.

[0020] Beneficial effect: Compared with the prior art, the present invention provides a security gateway system that aggregates IoT devices from multiple operators. The security gateway system in the present invention includes: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device. The security gateway device integrates various communication protocols, wherein the security gateway device is a ten-layer device, and the ten-layer device is an OSI ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OSI seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, the presentation layer, and the business application layer physically shield the IoT devices corresponding to the OSI seven-layer device. The present invention firstly integrates the existing security communication technology into a convergence node device, which can simultaneously support a security gateway device with multiple communication protocols, multiple heterogeneous devices, and multiple access modes, improves the mode with network operators as the communication center into a star network with the security gateway device as the communication center, integrates the existing security access products, and enables multiple devices to communicate securely without decryption, or decrypt and then encrypt secure communication; secondly, the existing security communication mechanism is improved, data in the lot network is encrypted for transmission, and a secure communication channel in which the operator cannot view the plain text is established between the Internet of Things device and the security gateway. The data transmission uses double encryption provided by the operator and the security gateway respectively. The two encryption methods are combined with each other without interfering with each other, thereby ensuring the security of data transmission on the public network and avoiding the risk of data leakage caused by loopholes in the security mechanism of the third-party operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a working principle diagram of the security gateway that aggregates IoT devices from multiple operators in the present invention.

[0022] Figure 2 The figure is a schematic diagram of the communication data flow transmission between the IoT device, the operator and the security gateway in the present invention.

[0023] Figure 3 The present invention is a schematic diagram of a star-shaped communication network that simultaneously connects multiple communication protocols and multiple heterogeneous devices.

[0024] Figure 4 This is a functional block diagram of the security gateway device in the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] This embodiment provides a security gateway system that aggregates IoT devices from multiple operators, through which the comprehensive deep interconnection and secure communication of multiple IoT devices can be realized in one. In specific implementation, the security gateway system includes: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device. The security gateway device integrates various communication protocols, wherein the security gateway device is a ten-layer device, and the ten-layer device is an OSI ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OSI seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, the presentation layer, and the business application layer physically shield the IoT devices corresponding to the OSI seven-layer device. The present invention forms a ten-layer security gateway device by superimposing a session layer, a presentation layer, and a business application layer on an OSI seven-layer device, and then forms a security gateway system with the operator device and the IoT device, thereby realizing comprehensive deep interconnection and secure communication.

[0027] Exemplary Methods

[0028] This embodiment provides a security gateway system that aggregates IoT devices from multiple operators. The system can be applied to commercial display terminals or projection terminals. Figure 1 As shown, the security gateway system of this embodiment includes the following steps:

[0029] In one implementation, the security gateway system includes: a security gateway device, an operator device connected to the security gateway device, and various Internet of Things devices connected to the operator device. The security gateway device is a ten-layer security gateway device formed by superimposing the eighth-layer session layer, the ninth-layer presentation layer, and the tenth-layer business application layer on the OSI seven-layer device. Various communication protocols are integrated on the security gateway device, such as HTTP protocol, TLS protocol, SSL protocol, TCP protocol, DP protocol and other communication protocols. The eighth-layer session layer is used to realize security gateway communication with different Internet of Things devices. The networks provided by the operator are all traditional OSI seven-layer models and do not support the ten-layer security gateway device. Therefore, the eighth-layer session layer, the ninth-layer presentation layer and the tenth-layer business application layer physically shield the Internet of Things devices corresponding to the OSI seven-layer devices. The Internet of Things devices include: TCP / IP devices, lot devices, serial port devices, satellite devices, and the Internet of Things devices can realize the interconnection between people, machines, and objects at any time and any place; the IoT devices can be shared power banks, shared bicycles, etc.; the serial port devices can be projectors, cameras, single-chip microcomputers, etc.; the satellite devices can be satellite TV, etc.

[0030] In one implementation, the IoT device establishes a secure communication link with the operator device; the operator device establishes a secure communication link with the security gateway device; the operator device is an OSI layer 7 device. That is to say, during the entire communication process, a secure communication link is established between the IoT device and the operator at the sixth layer presentation layer, and a secure communication link is established between the operator device and the security gateway device at the sixth layer presentation layer. The OSI layer 7 device includes: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.

[0031] In the specific implementation, TLS and SSL presentation protocols are established between the IoT device and the operator device, and TLS and SSL presentation protocols are established between the operator device and the security gateway device. The operator device decrypts the ciphertext sent by the sixth layer presentation layer of the IoT device to parse out the plaintext data, and then the operator device encrypts the parsed plaintext data and transmits it to the security gateway device. By using double encryption provided by the operator device and the security gateway device for the transmission data, the security of data transmission is greatly guaranteed. The two encryption methods are combined with each other without interfering with each other.

[0032] In one implementation, when the IoT device is also a ten-layer device, the operator device, as a switching device of the OSI ten-layer device, forwards the data of the eighth-layer session layer and the ninth-layer presentation layer of the OSI ten-layer device to the security gateway device. That is, when the IoT device communicates with the security gateway device, the operator device forwards the data from the eighth layer to the ninth layer to the security gateway device, and the security gateway device processes the seventh-layer session message to determine the destination to which the received message is to be forwarded, the specific forwarding information, etc. The eighth-layer presentation layer decrypts the ciphertext, and then forwards the tenth-layer business application layer data to the intranet server.

[0033] In one implementation, when the IoT device uses the ninth layer presentation layer to establish a secure link with the security gateway device, all the OSI seventh layer devices passing through act as seventh layer switches to forward data to the security gateway device. The operator devices above the seventh layer are not capable of parsing messages at the eighth layer and above, so the data message content is kept confidential to all OSI seventh layer devices, thereby achieving reliable and trustworthy end-to-end encrypted transmission of data.

[0034] In one implementation, the communication of the security gateway system for aggregating IoT devices in multiple operators includes the following steps:

[0035] Step S100: Figure 2 As shown, first, the IoT device and the security gateway device simultaneously perform identity authentication with the operator device; when the authentication is successful, the operator is now a security proxy gateway;

[0036] Step S200: After identity authentication is passed, a secure channel is established between the IoT device and the security gateway device through key negotiation, and a communication connection is established between the IoT device and the operator device based on a preset first communication protocol. In specific implementation, after a secure channel is established between the IoT device and the security gateway device, the operator at this time only exists as a proxy gateway, and the operator device can be understood as a seven-layer switch, that is, as a data transmission transfer station, so that the security services provided by the operator device are shielded when data flows between the security gateway device and the IoT device; the first communication protocol is LLVM, COAPS protocol, and the seventh-layer application layer of the OSI seven-layer device carries the eighth-layer session layer and the tenth-layer business application layer.

[0037] Step S300, the IoT device sends a data message to the operator device, the operator device decrypts the data message, and sends it to the security gateway device through a preset second communication protocol. In the specific implementation, the IoT device transmits a data message based on the COAPS protocol to the operator device, the operator device decrypts the received COAPS data message, forwards the seventh-layer application layer data, and then transmits it to the security gateway device through the HTTPS protocol. The second communication protocol is the HTTPS protocol, and the seventh-layer application layer of the OSI seven-layer device carries the eighth-layer session layer and the tenth-layer business application layer.

[0038] Step S400: After receiving the data message from the operator device, the security gateway device sequentially parses the sixth layer security protocol, the seventh layer application data, the eighth layer session protocol, the ninth layer security protocol and the tenth layer business application layer data, and forwards it to the intranet server.

[0039] In the specific implementation, the security services provided by the operator's equipment are transferred to a customer-controllable security gateway. By adding three more layers on top of the OSI model, business data can safely pass through all unreliable nodes in the communication link, and the proxy-type application device can be used as a switch that supports this ten-layer protocol device, greatly expanding the network's adaptability.

[0040] In another implementation, Figure 3As shown, network port communication, serial port communication, satellite communication, and operator-based IoT communication are integrated into the same device, so that the device not only supports ciphertext communication between IoT devices and the main station, but also can realize data forwarding between the network port devices, serial port devices, satellite devices, and IoT devices, and supports parsing the plaintext first and then encrypting it. The device acts as a ten-layer proxy security gateway, and the eighth-layer session layer realizes this function; it also supports direct forwarding without decryption. The device acts as a seven-layer proxy security gateway, and the communication data between the IoT devices is invisible. In this way, the network centered on the network operator is transformed into a star network centered on the security gateway, forming a star network with multiple protocols and multiple heterogeneous devices connected at the same time. The security gateway becomes the core node for data processing.

[0041] In this embodiment, the access of lot devices of multiple operators is supported. For the server, the differences in access protocols of each operator can be shielded, and only necessary business data needs to be processed. The access protocols of the security gateway device and each operator are different. By using the ten-layer model, the differences in network architecture and implementation of each operator can be shielded, so that all accessible lot devices can be unified, so that the lot devices accessed by the three operators can be converged to a unified node. The security gateway device shields the differences in communication protocols between the operator devices, so that the Internet of Things devices accessed by different operators can perceive each other through the aggregation node of the security gateway, thereby forming a lot device network centered on the security gateway device. Among them, in order to shield the differences between networks, a simple session layer protocol is designed. The session layer protocol is applied to the eighth layer session layer. The specific format of the session layer protocol is shown in Table 1 below:

[0042]

[0043]

[0044] Table 1

[0045] MessagelD indicates the type of message, which is divided into two types. The uplink indicates from the Internet of Things to the security gateway, and the downlink indicates from the security gateway to the Internet of Things device; Rmid indicates the message sequence number, with an initial value of 1, which will be automatically increased by one for each message sent; DataframdefragmentTotal indicates the total number of subpackets when subpacketing. Since it passes through various types of heterogeneous networks, the maximum transmission packet size of each network is different; DataframdefragmentNo indicates which packet the current packet is in the subpacketization; Uid indicates the id of the Internet of Things device; Did indicates the id of the destination device. When the Did field is all 0, it means that it is directly decrypted and forwarded to the intranet server. Otherwise, the message can be forwarded to another Internet of Things device according to the Did. The security gateway automatically handles the communication link problem, whether it is a satellite device or a traditional tcp / ip network device; RecvDatalen indicates the length of the ninth layer session layer message.

[0046] The working principles of each template in the communication system of the security gateway system that aggregates IoT devices of multiple operators in this embodiment are the same as the principles of each step in the above method embodiment, and will not be repeated here.

[0047] Based on the above embodiment, the present invention further provides a security gateway device, the principle block diagram of which can be shown in Figure 4. The security gateway device is the host computer in the above embodiment, such as a computer device. The security gateway device may include one or more processors 100 ( Figure 4 Only one is shown), a memory 101 and a computer program 102 stored in the memory 101 and executable on one or more processors 100, for example, a program for aggregating communications of security gateway systems of IoT devices in multiple operators. When one or more processors 100 execute the computer program 102, the various steps in the method embodiment for aggregating communications of security gateway systems of IoT devices in multiple operators can be implemented. Alternatively, when one or more processors 100 execute the computer program 102, the functions of the various templates / units in the device embodiment for aggregating communications of security gateway systems of IoT devices in multiple operators can be implemented, which is not limited here.

[0048] In one embodiment, the processor 100 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0049] In one embodiment, the memory 101 may be an internal storage unit of an electronic device, such as a hard disk or memory of the electronic device. The memory 101 may also be an external storage device of the electronic device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device. Furthermore, the memory 101 may also include both an internal storage unit of the electronic device and an external storage device. The memory 101 is used to store computer programs and other programs and data required by the security gateway device. The memory 101 may also be used to temporarily store data that has been output or is to be output.

[0050] Those skilled in the art will understand that Figure 4 The principle block diagram shown is only a block diagram of a partial structure related to the solution of the present invention, and does not constitute a limitation on the security gateway device to which the solution of the present invention is applied. The specific security gateway device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0051] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, operating database or other media used in the embodiments provided by the present invention may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double operational data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0052] In summary, the present invention discloses a security gateway system that aggregates IoT devices in multiple operators, the security gateway system includes: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device, wherein the security gateway device integrates various communication protocols, wherein the security gateway device is a ten-layer device, and the ten-layer device is an OSI ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OSI seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, the presentation layer, and the business application layer physically shield the IoT devices corresponding to the OSI seven-layer device. The present invention forms a ten-layer security gateway device by superimposing a session layer, a presentation layer, and a business application layer on an OSI seven-layer device, and then forms a security gateway system that aggregates IoT devices in multiple operators together with the operator device and the IoT device, thereby realizing a security gateway system that integrates comprehensive deep interconnection and secure communication.

[0053] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A security gateway system for aggregating IoT devices from multiple operators, characterized in that: The security gateway system comprises: a security gateway device, an operator device connected to the security gateway device, and various IoT devices connected to the operator device, wherein the security gateway device integrates various communication protocols, wherein the security gateway device is a ten-layer device, and the ten-layer device is an OSI ten-layer device that superimposes a session layer, a presentation layer, and a business application layer on an OSI seven-layer device; the session layer is used to realize gateway communication with different IoT devices, and the session layer, the presentation layer, and the business application layer physically shield the IoT devices corresponding to the OSI seven-layer device; When the IoT device is also a ten-layer device, the operator device serves as a switching device of the OSI ten-layer device, and forwards data of the eighth-layer session layer and the ninth-layer presentation layer of the OSI ten-layer device to the security gateway device; The session layer is used to realize gateway communication with different Internet of Things devices, including a session layer protocol; the session layer protocol is applied to the eighth layer session layer; the session layer protocol includes: MessagelD represents the type of message, which is divided into two types, the uplink represents from the Internet of Things to the security gateway, and the downlink represents from the security gateway to the Internet of Things device; Rmid represents the message sequence number, the initial value is 1, and it will automatically increase by one for each message sent; DataframdefragmentTotal represents the total number of subpackets when subpacketizing, and the maximum transmission packet size of each network is different; DataframdefragmentNo represents the number of subpackets of the current packet; Uid represents the id of the Internet of Things device; Did represents the id of the destination device, when the Did field is all 0, it means that it is directly decrypted and forwarded to the intranet server, otherwise the message is forwarded to another Internet of Things device according to the Did; RecvDatalen represents the length of the eighth layer session layer message.

2. The security gateway system for aggregating IoT devices of multiple operators according to claim 1, characterized in that: The Internet of Things devices include: TCP / IP devices, IoT devices, serial port devices, and satellite devices.

3. The security gateway system for aggregating IoT devices of multiple operators according to claim 2, characterized in that: The Internet of Things device establishes a secure communication link with the operator device, and the operator device establishes a secure communication link with the security gateway device; the operator device is an OSI layer 7 device.

4. The security gateway system for aggregating IoT devices of multiple operators according to claim 3, characterized in that: The OSI seven-layer device includes: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.

5. The security gateway system for aggregating IoT devices of multiple operators according to claim 1, characterized in that: When the Internet of Things device uses the ninth layer presentation layer to establish a secure link with the security gateway device, all OSI seven-layer devices passed through act as seven-layer switches to forward data to the security gateway device.

6. A communication method for a secure gateway system aggregating IoT devices of multiple operators based on any one of claims 1 to 5, characterized in that: The communication method comprises: The IoT device and the security gateway device simultaneously authenticate the identity of the operator's device; After the identity authentication is passed, a secure channel is established between the IoT device and the security gateway device, and a communication connection is established between the IoT device and the operator device based on a preset first communication protocol; The IoT device sends a data message to the operator device, and the operator device decrypts the data message and sends it to the security gateway device through a preset second communication protocol; After receiving the data message from the operator device, the security gateway device sequentially parses the sixth layer security protocol, seventh layer application data, eighth layer session protocol, ninth layer security protocol and tenth layer business application layer data, and forwards it to the intranet server.

7. The communication method according to claim 6, characterized in that: The first communication protocol is LLVM or COAPS protocol; the second communication protocol is HTTPS protocol.

8. A security gateway device, characterized in that: The security gateway device includes a memory, a processor, and a communication program stored in the memory and executable on the processor. When the processor executes the communication program, the steps of the communication method as described in claim 6 or 7 are implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a communication program, and when the communication program is executed by the processor, the steps of the communication method according to claim 6 or 7 are implemented.

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