CN118193254B - A process communication method, device, medium and equipment - Google Patents

Abstract

The application provides a process communication method, a device, a medium and equipment, wherein the method comprises the following steps: acquiring a message sent by a sender process, wherein the message comprises a keyword for identifying a communication function; the process communication module locally stores the mapping relation between the keywords and the communication modes, wherein the communication modes comprise a direct communication mode of directly communicating a sender process with a receiver process and an indirect communication mode of communicating the sender process with the receiver process through a transfer unit; analyzing the keywords in the message, and determining a corresponding communication mode according to the mapping relation; and sending the message to the receiver process based on the determined communication mode. According to the application, different communication strategies can be flexibly adopted according to specific communication scene requirements, the problem of low speed of a single transit communication mode is effectively solved, and the communication efficiency between processes is obviously improved, so that the method can be better suitable for equipment with high requirements on data transmission rate, such as scanners.

Description

A process communication method, device, medium and equipment

Technical Field

The present invention relates to the field of network communication technology, and in particular to a process communication method, device, medium and equipment.

Background Art

In the field of modern information technology, inter-process communication is a key technology for realizing data exchange and synchronization between different processes in a multi-tasking operating system, and the efficiency of inter-process communication directly affects the overall performance and response speed of the device.

Currently, most of the existing inter-process communication technologies are based on the QtTunnel module, which is sent to the Broker through QTcpSocket to achieve inter-process communication. However, this method often encounters the problem of slow transmission speed when transmitting large amounts of data, which is unacceptable for application scenarios such as scanners that require processing large amounts of data and high-speed data transmission.

Summary of the invention

To overcome the problems existing in the related art, this specification provides a process communication method, device, medium and equipment.

According to a first aspect of an embodiment of this specification, a process communication method is provided, which is applied to a process communication module, and the method includes:

Acquire a message sent by a sending process, wherein the message includes a keyword identifying a communication function; the process communication module locally stores a mapping relationship between the keyword and the communication mode, wherein the communication mode includes a direct communication mode in which the sending process directly communicates with the receiving process, and an indirect communication mode in which the sending process communicates with the receiving process through a transfer unit;

Parsing the keywords in the message and determining the corresponding communication mode according to the mapping relationship;

Based on the determined communication mode, the message is sent to the recipient process.

According to a second aspect of an embodiment of this specification, a process communication device is provided, which is applied to a process communication module, and the device includes:

A message acquisition module, used to acquire a message sent by a sending process, wherein the message includes a keyword identifying a communication function; the process communication module locally stores a mapping relationship between the keyword and the communication mode, wherein the communication mode includes a direct communication mode in which the sending process directly communicates with the receiving process, and an indirect communication mode in which the sending process communicates with the receiving process via a transfer unit;

A communication mode determination module, used to parse the keywords in the message and determine the corresponding communication mode according to the mapping relationship;

The message sending module is used to send the message to the receiving process based on the determined communication mode.

According to a third aspect of the embodiments of this specification, a computer-readable storage medium is provided, storing a computer program, wherein the program, when executed by a processor, implements the steps of any one of the above-mentioned communication methods.

According to a fourth aspect of the embodiments of this specification, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned communication methods when executing the program.

The technical solutions provided by the embodiments of this specification may have the following beneficial effects:

In the embodiments of this specification, by dynamically analyzing the messages transmitted by process communication, the most appropriate communication method is selected for different communication scenarios, so that different communication strategies can be flexibly adopted according to the specific communication scenario requirements, effectively solving the problem of slow speed of a single transit communication method, and significantly improving the efficiency of inter-process communication, making it better suitable for devices such as scanners that have high requirements for data transmission rates.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

FIG. 1 is a flow chart of a process communication method according to an exemplary embodiment of the present specification.

FIG. 2 is a schematic diagram of a communication connection relationship in an indirect communication method according to an exemplary embodiment of this specification.

FIG3 is a flowchart of a process communication method when a communication mode is an indirect communication mode according to an exemplary embodiment of the present specification.

FIG. 4 is a flowchart of a process communication method when another communication mode is an indirect communication mode according to an exemplary embodiment of the present specification.

FIG5 is a schematic diagram of a communication connection relationship in a direct communication mode according to an exemplary embodiment of this specification.

FIG6 is a flowchart of a process communication method when a communication mode is a direct communication mode according to an exemplary embodiment of the present specification.

FIG. 7 is a flowchart of a process communication method when a communication mode is a direct communication mode according to an exemplary embodiment of the present specification.

FIG8 is a hardware structure diagram of a computer device where the process communication device of the embodiment of this specification is located.

FIG. 9 is a block diagram of a process communication device according to an exemplary embodiment of the present specification.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this specification. The singular forms "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and/or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this specification, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

The existing inter-process communication generally adopts the QTcpSocket-based relay communication method. Specifically, the inter-process communication relies on the QtTunnel module, which sends messages to the Broker through QTcpSocket, and then the Broker completes the message relay.

In this relay communication mode, all communication data must be forwarded through a relay server (such as MQTT Broker). This process not only introduces additional network delays, but also may significantly reduce the transmission speed when processing large amounts of data transmission because the server load and network conditions further limit the data transmission rate. For example, even transmitting empty map data takes about 10 milliseconds.

For application scenarios that require processing large amounts of data and high-speed data transmission, such as scanners, a large amount of data needs to be processed and transmitted quickly and continuously during the scanning process to ensure the scanned image quality and processing speed. The data transmission rate of the existing process communication method obviously cannot fully match the use requirements of the scanner, which will seriously affect the work efficiency and user experience of scanners and other equipment.

In view of the limitations of the above-mentioned prior art, the present application proposes a new process communication method, which dynamically analyzes the messages transmitted by process communication and selects the most appropriate communication method for different communication scenarios, so as to flexibly adopt different communication strategies according to the specific communication scenario requirements, effectively solves the problem of slow speed of single transit communication method, and significantly improves the efficiency of inter-process communication, making it better suitable for devices with high requirements for data transmission rate, such as scanners.

Next, the embodiments of this specification are described in detail.

FIG1 is a flow chart of a process communication method according to an exemplary embodiment of the present specification. As shown in FIG1 , the process communication method is applied to a process communication module and includes the following steps:

S101, obtaining a message sent by a sending process, the message including a keyword identifying a communication function; a process communication module locally stores a mapping relationship between the keyword and a communication mode, the communication mode including a direct communication mode in which the sending process directly communicates with the receiving process, and an indirect communication mode in which the sending process communicates with the receiving process through a transfer unit;

S102, parsing the keywords in the message, and determining the corresponding communication mode according to the mapping relationship;

S103: Send the message to the receiving process based on the determined communication method.

The process communication module can be a software component developed under various frameworks based on various communication protocols to realize inter-process data transmission and communication. The following embodiments are described by taking the process communication module as the QtTunnel module developed based on the MQTT protocol in the Qt framework as an example.

When performing process communication, the sending process can call the communication interface of the QtTunnel module and pass in the message to be sent. Since the sending process may have different communication requirements, the message may include not only the specific data content to be transmitted, but also keywords that identify various communication functions. The communication function can be understood as the need and purpose of the sending process to communicate, so that the QtTunnel module can dynamically identify the keywords in the message, distinguish the process communications with different communication functions, and flexibly select the appropriate communication method based on the characteristics of different process communications, thereby avoiding the problem of slow communication efficiency caused by the use of a single transit method in all communication processes.

The specific operation of determining the communication mode may be to pre-store the mapping relationship between the keyword and the appropriate communication mode in the QtTunnel module locally, and when the QtTunnel module identifies a keyword, determine the corresponding communication mode by searching the mapping relationship. The local storage mapping relationship may be in various forms such as an associative array and a mapping table.

In this embodiment, two communication modes, indirect communication mode and direct communication mode, are provided. The indirect communication mode involves message forwarding through a transfer unit; while the direct communication mode allows the sender and the receiver process to communicate directly point-to-point without the intervention of the transfer unit, thereby significantly reducing communication delay and improving communication efficiency. Specifically, the indirect communication mode may include QTcpSocket or QLocalSocket, and the direct communication mode may include boost::message_queue.

The communication functions between processes can be roughly divided into two categories. The first type of communication functions mainly involve complex interactivity and multi-party communication operations, such as initiating requests, providing responses, broadcasting messages, subscribing to messages, establishing mapping relationships, executing callback operations, etc. The corresponding keywords can be req, map, pub, sub, rep, cab. Such communication functions usually need to be performed across processes or network nodes, and may include complex routing steps. Therefore, they need to set up corresponding intermediary services for coordination and management. For example, in the request/response mode, the central node is responsible for coordinating the sending of requests and the receiving of responses; the intermediary node is responsible for distributing messages to multiple subscribers when broadcasting messages; when establishing mapping relationships and executing callback operations, the intermediary service is responsible for maintaining and tracking status information. These requirements are consistent with the characteristics of indirect communication methods, and the transit unit can be used to effectively implement these complex communication requirements. The second type of communication functions mainly involve simple process communications within the same device, such as message queue sending and receiving, etc. The corresponding keywords can be mqs and mqr. This type of communication function does not involve complex routing and does not require the establishment of additional intermediary services for management. Therefore, direct communication is more appropriate, which can reduce unnecessary transit costs and improve the efficiency of data transmission.

Based on the above features, in some embodiments, parsing keywords in the message and determining the corresponding communication method based on the mapping relationship may include: if a keyword identifying the first communication function is identified, determining that the communication method is an indirect communication method, and the first communication function includes initiating a request, and/or providing a response, and/or broadcasting a message, and/or subscribing to a message, and/or establishing a mapping relationship, and/or performing a callback operation; if a keyword identifying the second communication function is identified, determining that the communication method is a direct communication method, and the second communication function includes message queue sending, and/or message queue receiving.

The QtTunnel module can parse the keywords in the message through the Qt meta information parsing mechanism. Qt meta information is a runtime message object inspection and operation function provided by the Qt framework, which allows the program to obtain the class information, methods, properties, etc. of the message object.

In different communication modes, the communication connection relationship and the communication process between processes are different. The following describes the process communication methods for indirect communication mode and direct communication mode respectively.

If the determined communication mode is an indirect communication mode, the sender process and the receiver process can establish a communication connection with the transfer unit through the process communication module. The schematic diagram of the communication connection relationship is shown in Figure 2. After the process communication module obtains the message sent by the sender process, it first sends the message to the transfer unit, and then forwards the message to the receiver process through the transfer unit. Since the indirect communication mode is provided with a transfer unit for message transfer processing, various complex communication requirements can be met, so it can be used for both cross-device process communication and process communication on the same device.

Fig. 3 is a flowchart of a process communication method when a communication mode is an indirect communication mode according to an exemplary embodiment of the present specification. As shown in Fig. 3, the first two steps of the process communication method are the same as the first two steps of the method in the embodiment of Fig. 1, and step S103 is further refined into step S203: if the determined communication mode is an indirect communication mode, the message is sent to the transfer unit so that the transfer unit forwards the message to the receiving process.

In order to more accurately adapt to different indirect communication needs, in some embodiments, the indirect communication method can be subdivided into a first indirect communication method and a second indirect communication method; the first indirect communication method is used to implement cross-device process communication or same-device process communication, and the second indirect communication method is used to implement the same-device process communication; the communication performance of the second indirect communication method when implementing the same-device process communication is higher than the communication performance of the first indirect communication method when implementing the same-device process communication. For example, specifically, the first indirect communication method can be QTcpSocket, and the second indirect communication method can be QLocalSocket.

Based on these two indirect communication methods, the process communication module can be initialized through different constructors, and according to the different parameters in the parsed constructors, communication connections corresponding to different indirect communication methods are established between the sender process, the receiver process and the transfer unit, so that in the subsequent process communication process, once the communication method is determined to be an indirect communication method, the process communication module can only communicate through the established indirect communication method that matches the actual communication needs, thereby ensuring that the choice of communication method can accurately fit the actual communication needs, thereby optimizing communication efficiency and performance. Among them, the constructor can be manually constructed or automatically generated to match the actual indirect communication needs.

Specifically, if the parameters in the constructor include a port number, it indicates that the communication requirement may involve process communication across devices, because the port number is usually used in conjunction with the IP address to ensure that data reaches the target device and process across the network, and since the first indirect communication method is applicable to process communication across devices, it can be determined that the current indirect communication method is the first indirect communication method, and a communication connection corresponding to the first indirect communication method is established between the sender process, the receiver process, and the transit unit; and if the parameters in the constructor include a service name, it usually indicates that the communication requirement may be limited to a specific process or service in the same device, and since the second indirect communication method is applicable to process communication with the same device and can provide higher communication performance than the first indirect communication method, it can be determined that the current indirect communication method is the second indirect communication method, and a communication connection corresponding to the second indirect communication method is established between the sender process, the receiver process, and the transit unit.

FIG4 is a flowchart of a process communication method when another communication mode is an indirect communication mode according to an exemplary embodiment of the present specification. As shown in FIG4, the remaining steps of the process communication method remain unchanged, and only step S303 in FIG3 is refined to be:

S403: If the determined communication mode is an indirect communication mode, obtain and parse a constructor of an initialization process communication module;

S404: If the construction parameter includes a port number, determine that the indirect communication mode is a first indirect communication mode, and establish a communication connection corresponding to the first indirect communication mode between the sender process, the receiver process, and the transfer unit;

S405: If the construction parameter includes a service name, determining that the indirect communication mode is a second indirect communication mode, and establishing a communication connection corresponding to the second indirect communication mode between the sender process, the receiver process, and the transfer unit;

S406: Send the message to the transfer unit so that the transfer unit forwards the message to the receiving process.

If the determined communication mode is direct communication mode, the sender process and the receiver process can directly communicate point-to-point, and the communication connection relationship diagram is shown in Figure 5. After the process communication module obtains the message sent by the sender process, it writes the message into the message queue shared by the sender process and the receiver process, so that the receiver process obtains the message from the message queue.

Fig. 6 is a flowchart of a process communication method when a communication mode is a direct communication mode according to an exemplary embodiment of the present specification. As shown in Fig. 6, the first two steps of the process communication method are the same as the first two steps of the method in the embodiment of Fig. 1, and step S103 is further refined into step S603: if the communication mode determined is a direct communication mode, write the message into a message queue shared by the sending process and the receiving process, so that the receiving process obtains the message from the message queue.

Furthermore, in order to enable the receiving process to accurately obtain the message sent to the present process from the message queue, in some embodiments, the message may also include identification information of the receiving process; so that the receiving process can obtain the message sent to the present process from the message queue according to the identification information.

FIG7 is a flowchart of a process communication method when another communication mode is a direct communication mode according to an exemplary embodiment of the present specification. As shown in FIG7, the first two steps of the process communication method are the same as the first two steps of the embodiment method in FIG6, and step S603 is further refined into step S703: if the determined communication mode is a direct communication mode, write the message into a message queue shared by the sending process and the receiving process, so that the receiving process obtains the message sent to the present process from the message queue according to the identification information.

In addition, this specification also provides a test verification of the data transmission speed of the three communication methods QTcpSocket, QLocalSocket, and boost::message_queue mentioned in the above embodiments in process communication, so as to evaluate and compare the performance of these three communication methods in actual applications, especially in terms of data transmission speed.

Testing process:

1. The business sending process randomly generates a QByteArray array of fixed length and sends the data to the business receiving end through the specified underlying communication method.

2. After receiving the data, the business receiving process sends a successful reception message to the business sending process.

3. After the business sending process receives the success message from the business receiving process, a round of message sending is completed.

4. Repeat the above operation 1000 times and calculate the average time taken to send these 1000 rounds of messages.

5. In the test program, the start time and end time of each round of message sending will be recorded in order to calculate the time taken for each round of message sending and finally get the average time taken.

QTcpSocket speed transmission verification

QLocalSocket speed transmission verification

Boost::MessageQueue speed transmission verification

The test results show that the communication performance of QLocalSocket and boost::message_queue is better than that of QTcpSocket. For process communication within the same device, the communication efficiency can be significantly improved, which verifies the effectiveness of this application in improving the efficiency of inter-process communication, especially in applications or devices with high real-time requirements.

Corresponding to the embodiments of the aforementioned method, this specification also provides embodiments of a process communication device and a terminal used therein.

The embodiments of the process communication device of this specification can be applied to computer equipment, such as servers or terminal devices. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. Taking software implementation as an example, as a device in a logical sense, it is formed by the processor reading the corresponding computer program instructions in the non-volatile memory into the memory and running them. From the hardware level, as shown in Figure 8, it is a hardware structure diagram of the computer device where the process communication device of the embodiment of this specification is located. In addition to the processor 801, memory 802, network interface 803, and non-volatile memory 804 shown in Figure 8, the server or electronic device where the device is located in the embodiment can also include other hardware according to the actual function of the computer device, which will not be described in detail.

FIG9 is a block diagram of a process communication device according to an exemplary embodiment of the present specification. As shown in FIG9 , the process communication device includes:

The message acquisition module 901 is used to acquire the message sent by the sender process, wherein the message includes a keyword identifying a communication function; the process communication module locally stores a mapping relationship between the keyword and the communication mode, wherein the communication mode includes a direct communication mode in which the sender process communicates directly with the receiver process, and an indirect communication mode in which the sender process communicates with the receiver process through a transfer unit;

The communication mode determination module 902 is used to parse the keywords in the message and determine the corresponding communication mode according to the mapping relationship;

The message sending module 903 is used to send the message to the receiving process based on the determined communication mode.

Accordingly, the present specification also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the communication method described in any of the above embodiments.

Accordingly, the present specification also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the communication method described in any of the above embodiments when executing the program.

The implementation process of the functions and effects of each module in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, which will not be repeated here.

For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this specification. Ordinary technicians in this field can understand and implement it without paying creative work.

The above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Those skilled in the art will readily appreciate other embodiments of the specification after considering the specification and practicing the invention claimed herein. The specification is intended to cover any variations, uses or adaptations of the specification that follow the general principles of the specification and include common knowledge or customary techniques in the art that are not claimed in the specification. The specification and examples are to be considered exemplary only, and the true scope and spirit of the specification are indicated by the following claims.

It should be understood that the present description is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims (8)

1. A process communication method, characterized in that it is applied to a process communication module, the method comprising: Acquire a message sent by a sending process, wherein the message includes a keyword identifying a communication function; the process communication module locally stores a mapping relationship between the keyword and the communication mode, wherein the communication mode includes a direct communication mode in which the sending process directly communicates with the receiving process, and an indirect communication mode in which the sending process communicates with the receiving process through a transfer unit; Parsing the keywords in the message and determining the corresponding communication mode according to the mapping relationship; Based on the determined communication mode, sending the message to the receiving process includes: If the determined communication mode is an indirect communication mode, sending the message to the transfer unit so that the transfer unit forwards the message to the receiving process; If the determined communication mode is a direct communication mode, writing the message into a message queue shared by the sender process and the receiver process, so that the receiver process obtains the message from the message queue; Wherein, the indirect communication mode includes a first indirect communication mode and a second indirect communication mode; The first indirect communication mode is used to implement inter-device process communication or intra-device process communication, and the second indirect communication mode is used to implement intra-device process communication; The communication performance of the second indirect communication method when implementing process communication with the device is higher than the communication performance of the first indirect communication method when implementing process communication with the device. 2. The method according to claim 1 is characterized in that the sender process and the receiver process are communicatively connected to the transfer unit through the process communication module. 3. The method according to claim 1, characterized in that the message also includes identification information of the receiving process; Writing the message into a message queue shared by the sender process and the receiver process so that the receiver process obtains the message from the message queue includes: The message is written into a message queue shared by the sending process and the receiving process, so that the receiving process obtains the message sent to the present process from the message queue according to the identification information. 4. The method according to claim 1, characterized in that before sending the message to the transfer unit, it also includes: Obtain and parse a constructor for initializing the process communication module; If the constructor includes a port number, determining that the indirect communication mode is a first indirect communication mode, and establishing a communication connection corresponding to the first indirect communication mode between the sender process, the receiver process and the transfer unit; If the constructor includes a service name, the indirect communication mode is determined to be a second indirect communication mode, and a communication connection corresponding to the second indirect communication mode is established between the sender process, the receiver process and the transfer unit. 5. The method according to any one of claims 1 to 4, characterized in that the parsing of the keywords in the message and determining the corresponding communication mode according to the mapping relationship comprises: If a keyword identifying a first communication function is identified, it is determined that the communication mode is an indirect communication mode, and the first communication function includes initiating a request, and/or providing a response, and/or broadcasting a message, and/or subscribing to a message, and/or establishing a mapping relationship, and/or performing a callback operation; If a keyword identifying a second communication function is identified, it is determined that the communication mode is a direct communication mode, and the second communication function includes message queue sending and/or message queue receiving. 6. A process communication device, characterized in that it is applied to a process communication module, and the device comprises: A message acquisition module, used to acquire a message sent by a sending process, wherein the message includes a keyword identifying a communication function; the process communication module locally stores a mapping relationship between the keyword and the communication mode, wherein the communication mode includes a direct communication mode in which the sending process directly communicates with the receiving process, and an indirect communication mode in which the sending process communicates with the receiving process via a transfer unit; A communication mode determination module, used to parse the keywords in the message and determine the corresponding communication mode according to the mapping relationship; A message sending module, configured to send the message to the receiving process based on the determined communication mode; if the determined communication mode is an indirect communication mode, send the message to the transfer unit so that the transfer unit forwards the message to the receiving process; if the determined communication mode is a direct communication mode, write the message into a message queue shared by the sending process and the receiving process so that the receiving process obtains the message from the message queue; Wherein, the indirect communication mode includes a first indirect communication mode and a second indirect communication mode; The first indirect communication mode is used to implement inter-device process communication or intra-device process communication, and the second indirect communication mode is used to implement intra-device process communication; The communication performance of the second indirect communication method when implementing process communication with the device is higher than the communication performance of the first indirect communication method when implementing process communication with the device. 7. A computer-readable storage medium storing a computer program, characterized in that when the program is executed by a processor, the steps of the communication method according to any one of claims 1 to 5 are implemented. 8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the communication method according to any one of claims 1 to 5 when executing the program.