Wireless communication system

Abstract

A wireless communication system according to one embodiment of the present invention includes a first communication module and at least one second communication module wirelessly connected to the first communication module, and the first communication module is wirelessly connected to the second communication module that receives driving power from the same power source.

Description

Technical Field

[0001] The present invention relates to a wireless communication system, and more specifically, to a wireless communication system and a method for configuring a wireless communication network that uses wireless communication to form a network between a master communication module and a slave communication module.

Background Art

[0002] A wireless communication module mounted on a vehicle or the like has difficulty securing a desired function or range (Range) with only one communication module. To secure the range of the communication module, as shown in FIG. 1, the main device 11 that processes communication can use a plurality of communication modules composed of one master 12 and a plurality of slaves 13. The main device 11 can be wired-connected to the master 12 and the plurality of slaves 13 respectively as shown in FIG. 1(A), or can be wired-connected to the plurality of slaves 13 via the master 12 as shown in FIG. 1(B).

[0003] When wired-connected, wires for connecting each module must be formed, resulting in wired costs, reduced freedom in design and layout due to wire arrangement, and restrictions on the positions where the slaves 13 are mounted.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technical problem to be solved by the present invention is to provide a wireless communication system and a method for configuring a wireless communication network that uses wireless communication to form a network between a master communication module and a slave communication module.

Means for Solving the Problems

[0005] To solve the aforementioned technical problems, a wireless communication system according to one embodiment of the present invention includes a first communication module and at least one second communication module wirelessly connected to the first communication module, wherein the first communication module is wirelessly connected to the second communication module which receives power from the same power source.

[0006] Furthermore, the first communication module and the second communication module can be wirelessly connected using identification data that includes RTC (Real Time Clock) data generated when the drive power supply is applied simultaneously.

[0007] Furthermore, the first communication module can wirelessly connect with a second communication module whose time information read from the RTC data is within an error range compared to its own time information.

[0008] Furthermore, the identification data may include received signal strength data.

[0009] Furthermore, the system includes a control unit that is wired to the first communication module and controls the communication of the wireless communication system. The first communication module can transmit the network configuration it has formed with a wirelessly connected and authenticated second communication module to the control unit, and can transmit data it receives from the second communication module that constitutes the same network to the control unit.

[0010] Furthermore, the first communication module may be a master communication module, and the second communication module may be a slave communication module.

[0011] Furthermore, after wirelessly connecting with the second communication module, the first communication module can receive authentication data generated using a secret key from the wirelessly connected second communication module, encrypt the received authentication data and transmit it to the wirelessly connected second communication module, and perform an authentication procedure by decrypting the encrypted authentication data in the wirelessly connected second communication module.

[0012] Furthermore, if the first communication module loses its connection to the second communication module, which is wirelessly connected to form a network, it will operate independently. However, when the power supply is subsequently initialized, it can wirelessly connect to a new second communication module that receives power from the same power supply.

[0013] To solve the aforementioned technical problems, a wireless communication network configuration method according to one embodiment of the present invention includes the steps of: applying a drive power supply from the same power source to a first communication module and at least one second communication module wirelessly connected to the first communication module; the first communication module receiving a wireless connection request from a second communication module that receives a drive power supply from the same power source; and the first communication module wirelessly connecting with the second communication module that received the wireless connection request using identification data included in the wireless connection request.

[0014] Furthermore, the identification data may include RTC (Real Time Clock) data generated when the drive power supply is simultaneously applied.

[0015] Furthermore, the step of wireless connection may include the step of the first communication module reading time information of the second communication module from the RTC data; and, if the time information of the second communication module read out is within an error range with the time information of the first communication module, the step of the first communication module wirelessly connecting with the second communication module.

[0016] The process may also include the steps of: the first communication module receiving authentication data generated using a secret key from the wirelessly connected second communication module; the first communication module encrypting the received authentication data and transmitting it to the wirelessly connected second communication module; and the wirelessly connected second communication module decrypting the encrypted authentication data and performing an authentication procedure.

[0017] Furthermore, the system may include a step in which the first communication module operates independently when its connection with the wirelessly connected second communication module is disconnected; and a step in which, when the power supply is subsequently initialized, the first communication module wirelessly connects with a new second communication module that receives power from the same power supply. [Effects of the Invention]

[0018] In embodiments of the present invention, mutual identification and data communication can be performed wirelessly without wired connections between paired and wirelessly performing modules. Eliminating wires between master and slave modules reduces costs and complexity, and increases the flexibility of module placement and design. Furthermore, in the recovery procedure for a specific module failure, after power is supplied, the modules automatically synchronize, eliminating the need for additional steps and procedures. If a specific module is inoperable, immediate status transmission is possible, enabling rapid network reconfiguration and recovery when a module is replaced. Moreover, even if a synchronized slave communication module is inoperable, the master communication module or other slave communication modules can independently perform certain partial functions as backup. [Brief explanation of the drawing]

[0019] [Figure 1] This is a block diagram of a wireless communication system according to a comparative example of the present invention. [Figure 2] This is a block diagram of a wireless communication system according to one embodiment of the present invention. [Figure 3] This is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 4] This is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 5] This is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 6] This is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 7]This is a diagram for explaining a wireless communication system according to an embodiment of the present invention. [Figure 8] This is a diagram for explaining a wireless communication system according to an embodiment of the present invention. [Figure 9] This is a flowchart of a method for configuring a wireless communication network according to an embodiment of the present invention. [Figure 10] This is a flowchart of a method for configuring a wireless communication network according to another embodiment of the present invention. [Figure 11] This is a flowchart of a method for configuring a wireless communication network according to another embodiment of the present invention. [Figure 12] This is a flowchart of a method for configuring a wireless communication network according to another embodiment of the present invention.

Mode for Carrying Out the Invention

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] However, the technical idea of the present invention is not limited to some of the described embodiments, but can be implemented in various different forms, and within the technical idea scope of the present invention, one or more of the components can be selectively combined or replaced between the embodiments and used.

[0022] In addition, the terms (including technical and scientific terms) used in the embodiments of the present invention can be interpreted as having a meaning generally understood by those having ordinary knowledge in the technical field to which the present invention belongs, unless clearly and specifically defined and described, and terms generally used like pre-defined terms should be able to interpret their meanings in consideration of the meaning in the context of the related technology.

[0023] In addition, the terms used in the embodiments of the present invention are for explaining the embodiments and do not limit the present invention.

[0024] In this specification, the singular form includes the plural form unless otherwise specified in the text, and when it says "A and / or at least one of B and C," it may include one or more of all possible combinations of A, B, and C.

[0025] Furthermore, when describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are used to distinguish a component from other components, and the term does not limit the essence, order, or sequence of the component in question.

[0026] Furthermore, when it is stated that a component is “linked,” “joined,” or “connected” to another component, this includes not only cases where the component is directly “linked,” “joined,” or “connected” to the other component, but also cases where it is “linked,” “joined,” or “connected” by another component between that component and the other component.

[0027] Furthermore, when described as being formed or positioned "above" or "below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or positioned between the two components. Also, when expressed as "above" or "below," it can include not only an upward direction relative to one component, but also a downward direction.

[0028] Figure 2 is a block diagram of a wireless communication system according to one embodiment of the present invention.

[0029] A wireless communication system 100 according to one embodiment of the present invention consists of a first communication module 110 and a second communication module 120, and may include a power supply unit 130 and a control unit 140. The communication modules according to the embodiment of the present invention may be wireless communication modules such as RF modules, NEC modules, Bluetooth modules, and WiFi modules, and are installed in vehicles or mobile terminals, but are not limited to these, and can be applied to any communication modules that are wirelessly connected to each other.

[0030] The system includes a first communication module 110 and at least one second communication module 120 wirelessly connected to the first communication module 110. The first communication module 110 and the second communication module 120 can be wirelessly connected one-to-one, or, as shown in Figure 3, one first communication module 110 can be wirelessly connected to multiple second communication modules 121 to 123 in a one-to-many configuration. Alternatively, multiple first communication modules 110 and multiple second communication modules 120 can be wirelessly connected in a many-to-many configuration to form a wireless communication network. In addition, wireless communication networks can be configured in various other ways.

[0031] The first communication module 110 may be a master communication module, and the second communication module 120 may be a slave communication module. Here, the master communication module means a communication module that is directly connected to the control unit 140 that controls communication in the wireless communication system, and the slave communication module means a communication module that is indirectly connected to the control unit 140 via the master communication module. Depending on the wireless communication network configuration, the first communication module 110 may be a slave communication module and the second communication module 120 may be a master communication module.

[0032] When the first communication module 110 and the second communication module 120 operate in conjunction with each other, the network must be configured so that the first communication module 110 and the second communication module 120 recognize each other as a pair via wireless communication. As shown in Figure 4(A), if the first communication module 110 is the master communication module and the second communication module 120 is the slave communication module, their interconnection allows the coverage of the entire wireless communication system to be extended to the entire device to which the wireless communication system is applied, such as a vehicle, through the coverage of each module. The pairing required for the first communication module 110 and the second communication module 120 to recognize each other as a pair must be performed between communication modules within the same device, and pairing with communication modules installed in other devices, as shown in Figure 4(B), must not be performed.

[0033] When the first communication module 110 and the second communication module 120 are connected by wire, the pairing process is not required. However, when they are connected wirelessly, the pairing process is mandatory. Pairing is performed between the first communication modules, and the paired communication modules store each other's information. From there, the stored information can be used to establish a wireless connection. Alternatively, pairing can be performed each time a wireless connection is established.

[0034] The first communication module 110 is wirelessly connected to the second communication module 120, which receives power from the same power source. The first communication module 110 and the second communication module 120 can be driven by power from a single power supply unit 130. The power supply unit 130 may be an independent power source such as a battery, or a power supply unit connected to a battery or an external source. The first communication module 110 and the second communication module 120 may be communication modules installed in the same device, such as a vehicle or mobile terminal, and can be driven by power from the power supply of the device in question. The first communication module 110 wirelessly connects to the second communication module 120 by utilizing the fact that it receives power from the same power source as the second communication module 120. Specifically, the first communication module 110 and the second communication module 120 are wirelessly connected through mutual identification by utilizing the fact that they are driven simultaneously when powered on, after receiving power from the same power source.

[0035] The first communication module 110 and the second communication module 120 can be wirelessly connected using identification data that includes RTC (Real Time Clock) data generated when the drive power supply is applied simultaneously. Each communication module includes an RTC module. The RTC (Real Time Clock) is a time-counting device that generates RTC data for data synchronization with other devices. The first communication module 110 and the second communication module 120 are driven by the same power supply, and when the drive power supply is applied, the RTC modules included in each communication module are driven. Because they are driven by the same power supply, the RTC modules of each communication module generate the same or within the same error range. By utilizing this, the first communication module 110 and the second communication module 120 can confirm that they are located within the same device, thereby enabling them to wirelessly connect to each other.

[0036] The first communication module 110 receives identification data including RTC (Real Time Clock) data from the second communication module 120, and can wirelessly establish a connection with the second communication module 120 if the time information read from the RTC data is within the error range of its own time information.

[0037] The identification data for the wireless connection may include received signal strength data. Here, the received signal strength data may be RSSI (Received Signal Strength Indication). RSSI is the received signal strength index, which is the average signal strength index at the receiver input. It measures the strength of all received signals entering the module, and in a real space, the desired signal, interference signals, and noise signals may be received together. Since the first communication module 110 and the second communication module 120 are located within the same device, the strength of the signals transmitted and received between them may be higher than that of communication modules located in other devices. Therefore, a wireless connection can be established by determining whether the value of the received signal strength read from the received signal strength data is above a threshold. The threshold can be set by the user or can be set differently depending on the installation environment.

[0038] As explained earlier, the first communication module 110 is a master communication module, and the first communication module 110, being a master communication module, can be directly connected to a control unit 140 that controls communication of the wireless communication system 100. Here, the control unit 140 is a module that performs wireless communication, includes one or more processors, and can be implemented in chip form. The control unit 140 can manage the configuration of the wireless communication network, external devices connected to the communication modules that constitute the wireless communication network, and control the wireless communication system to send and receive data so that wireless communication can be performed.

[0039] The control unit 140 is wiredly connected to the first communication module 110 and can control the communication of the wireless communication system. The first communication module 110 can transmit the network configuration it has formed with the wirelessly connected and authenticated second communication module 120 to the control unit 140, and can transmit data it receives from the second communication module 120, which constitutes the same network, to the control unit 140. The control unit 140 receives the network configuration from the first communication module 110 to manage the wireless communication network, and can receive and process wireless communication data received by the first communication module 110 or wireless communication data received from the second communication module 120.

[0040] After wirelessly connecting with the second communication module 120, the first communication module 110 receives authentication data generated using a secret key from the wirelessly connected second communication module 120, encrypts the received authentication data and transmits it to the wirelessly connected second communication module 120, and the wirelessly connected second communication module 120 can perform an authentication procedure by decrypting the encrypted authentication data.

[0041] The first communication module 110 and the second communication module 120 can perform additional authentication for security purposes after being wirelessly connected. After being wirelessly connected, the second communication module 120 transmits authentication data generated using a previously stored secret key to the first communication module 110 to request additional authentication. The first communication module 110 encrypts the received authentication data and transmits it to the second communication module 120. The second communication module 120 decrypts the encrypted authentication data and can perform authentication by determining whether the secret key of the decrypted authentication data is the same as the secret key it used to generate the authentication data.

[0042] Once wireless connection and authentication are complete, the wireless communication network configuration is finalized, and the first communication module 110 transmits the network configuration to the control unit 140, allowing the entire wireless communication network to operate in conjunction with each other.

[0043] The wireless connection, authentication, and interoperability processes can be performed as shown in Figure 5.

[0044] When the power supply is initialized, the first communication module 110, the second communication module 120, and the control unit 140 are powered by a drive power supply from the same power supply. The first communication module 110 is a master communication module, and the second communication module 120 may be a slave communication module. The second communication module 120, which is a slave communication module, transmits advertising data that includes identification data, and the first communication module 110, which is a master communication module, scans the advertising data and identifies the second communication module 120 using the identification data included in the advertising data. The identification data includes RTC data. Since the RTC data of the first communication module 110 and the second communication module 120 are the same or within an error range after power supply initialization, the first communication module 110 determines whether the time information of the RTC data read from the identification data received from the second communication module 120 is within an error range compared with its own time information, and performs identification to determine whether it is the second communication module 120 to wirelessly connect to. The identification data may further include RSSI data. The first communication module 110 and the second communication module 120, located within the same device, can determine that they have RSSI data above a threshold and perform the identification process. Once the first communication module 110 has completed the identification of the second communication module 120, it requests a connection from the second communication module 120, and a wireless connection is established between the first communication module 110 and the second communication module 120.

[0045] Subsequently, for security reasons, the second communication module 120 can perform additional authentication (Authorization). After completing the wireless connection, the second communication module 120 transmits authentication data generated through a predefined and stored key to the first communication module 110 to request additional authentication. Here, the secret key that generates the authentication data can be stored in advance by the user or when the program is downloaded. The first communication module 110 encrypts the authentication data received from the second communication module 120 and transmits it back to the second communication module 120. The second communication module 120 decrypts the data received from the first communication module 110 and completes the authentication. The second communication module 120 can complete the authentication by determining whether the decrypted and read secret key is the same as its own secret key.

[0046] Once the connection and network configuration are complete, the first communication module 110 updates and transmits the network configuration status to the wired control unit 140, and the entire system then performs wireless communication in conjunction (assigned).

[0047] The first communication module 110 and the second communication module 120 are not in a master-slave communication module relationship; they may be different communication modules, and in this case, pairing can be performed as shown in Figure 6. Each step in Figure 6 corresponds to the steps in Figure 5. First, power is applied simultaneously to the first communication module 110 and the second communication module 120. With the same internal power supply, one of the first communication module 110 or the second communication module 120 performs advertising (broadcasting), and the other performs scanning to perform identification to determine whether the second communication module 120 is a valid module within the device. At this time, the identification process can be performed using RTC data. Once identification is complete, a wireless connection is established between them. If identification fails, advertising and scanning are performed again. After wireless connection, authentication is performed for security. Once authentication is complete, the IDs of each module are shared and pairing is successfully completed through assignment. If authentication fails, the connection is disconnected, and advertising and scanning are performed again.

[0048] If a failure occurs in either the first communication module 110 or the second communication module 120 while the first communication module 110 and the second communication module 120 are operating as a wireless communication network, the system can disconnect the failed module, replace it, and then reconnect wirelessly.

[0049] If the first communication module 110 loses its connection to the second communication module 120, which is wirelessly connected and forms a network, it will operate independently. However, when the power supply is subsequently initialized, it can wirelessly connect to a new second communication module 120 that receives power from the same power supply. If a failure occurs in the second communication module 120 that forms the network, the first communication module 110 can disconnect from the second communication module 120 and operate independently to maintain wireless communication. Subsequently, when the second communication module 120 is replaced, it can perform the processes of wireless connection, authentication, and interoperation with the new second communication module 120.

[0050] The process of replacing the second communication module 120 and establishing a wireless connection with the new second communication module 120 can be carried out as shown in Figure 7.

[0051] After the network configuration between the first communication module 110, the second communication module 120, and the control unit 140 is completed, if a device error or other issue occurs in the second communication module 120, the connection is disconnected, and advertising does not occur. Therefore, even if the first communication module 110 performs scanning, it will not reconnect. If reconnection fails, the first communication module 110 transmits the disconnected state of the second communication module 120 to the control unit 140. The first communication module 110, whose network configuration with the second communication module 120 has been disconnected, operates independently, and the control unit 140 recognizes that the second communication module 120 is unable to operate. After the second communication module 120 is replaced, power initialization is performed for the reconnection of the second communication module 120. This enables advertising of the second communication module 120, allowing identification, connection, and authorization to be performed, followed by assignment to complete network reconstruction and enable wireless communication. Although not shown in the diagram, the identification information in the first communication module 110 can be initialized before the power supply initialization is performed.

[0052] If a failure occurs in the first communication module 110 rather than the second communication module 120, the process of replacing the first communication module 110 and establishing a wireless connection with the new first communication module 110 can be carried out as shown in Figure 8.

[0053] After the network configuration between the first communication module 110, the second communication module 120, and the control unit 140 is completed, if a device error occurs in the first communication module 110, the connection is disconnected and scanning of the first communication module 110 does not occur. Therefore, even if the second communication module 120 performs advertising, it will not reconnect. If reconnection fails, the second communication module 120 recognizes that the first communication module 110 is unable to operate, and the control unit 140 checks the operation of the first communication module 110 and recognizes that the first communication module 110 is unable to operate. After the first communication module 110 is replaced, power initialization is performed for the reconnection of the first communication module 110. This enables scanning of the first communication module 110, identification, connection, and authorization are performed, and the network reconstruction is completed through assignment, allowing wireless communication to be performed. At this time, although not shown in the diagram, the identification information in the first communication module 110 can be initialized before power initialization is performed.

[0054] As described above, mutual identification and data communication can be performed wirelessly without wired connections between paired and wirelessly performing modules. Eliminating wires between master and slave modules reduces costs and complexity, and increases the flexibility of module placement and design. Furthermore, in the recovery procedure for a specific module failure, after power is supplied, the modules automatically synchronize, eliminating the need for additional steps and procedures. If a specific module becomes inoperable, immediate status transmission is possible, and rapid network reconfiguration and recovery are possible when modules are replaced. In addition, even if a synchronized slave communication module becomes inoperable, the master communication module or other slave communication modules can independently perform certain functions as backup.

[0055] Figure 9 is a flowchart of a wireless communication network configuration method according to one embodiment of the present invention, and Figures 10 to 12 are flowcharts of wireless communication network configuration methods according to other embodiments of the present invention. Detailed explanations of each step in Figures 9 to 12 correspond to the detailed explanations of the wireless communication systems in Figures 1 to 8, so redundant explanations will be omitted below.

[0056] To configure a wireless communication network, first, in step S11, a power supply is applied from the same power source to the first communication module and at least one second communication module that is wirelessly connected to the first communication module. Then, in step S12, the first communication module receives a wireless connection request from the second communication module that receives the power supply from the same power source, and in step S13, the first communication module wirelessly connects with the second communication module that received the wireless connection request using the identification data included in the wireless connection request.

[0057] Here, the identification data may include RTC (Real Time Clock) data generated when the drive power supply is simultaneously applied, and may further include RSSI data.

[0058] The aforementioned wireless connection step S13 can be performed through steps S21 and S22. In step S21, the first communication module reads the time information of the second communication module from the RTC data, and in step S22, if the read time information of the second communication module is within an error range with the time information of the first communication module, the first communication module can establish a wireless connection with the second communication module.

[0059] From step S13 onwards, when wireless connection is established, authentication procedures can be performed in steps S31 to S33. In step S31, the first communication module receives authentication data generated using a secret key from the wirelessly connected second communication module; in step S32, the first communication module encrypts the received authentication data and transmits it to the wirelessly connected second communication module; and in step S33, the wirelessly connected second communication module decrypts the encrypted authentication data and performs the authentication procedure.

[0060] If a failure occurs in the communication module after the wireless connection is established in step S13, the wireless communication network can be reconfigured through steps S41 and S42. In step S41, if the first communication module loses its connection with the wirelessly connected second communication module, it operates independently, and then, when the drive power is initialized, in step S42, the first communication module can wirelessly connect with a new second communication module that receives drive power from the same power source.

[0061] On the other hand, embodiments of the present invention can be implemented with computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes any type of recording device on which data readable by a computer system is stored.

[0062] Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices. Furthermore, computer-readable recording media can be distributed across computer systems connected to a network, allowing computer-readable code to be stored and executed in a distributed manner. Functional programs, code, and code segments for realizing the present invention can be easily inferred by programmers in the technical field to which the present invention belongs.

[0063] Those with ordinary skill in the art related to this embodiment will understand that it can be realized in modified forms without departing from the essential characteristics described above. Accordingly, the disclosed method should be considered from an explanatory rather than restrictive viewpoint. The scope of the invention is shown in the claims, not in the foregoing description, and all differences within an equivalent scope should be construed as being included in the invention.

Claims

1. First communication module; and It includes at least one second communication module that is wirelessly connected to the first communication module, The first communication module is wirelessly connected to a second communication module that receives power from the same power source. The first communication module is, A wireless communication system in which the second communication module is wirelessly connected to the second communication module using identification data including RTC (Real Time Clock) data generated by the second communication module when the drive power supply is applied to the second communication module, and the time information read from the RTC data is within an error range with the second communication module's own time information.

2. The wireless communication system according to claim 1, wherein the identification data includes received signal strength data.

3. Includes a control unit which is wired to the first communication module and controls the communication of the wireless communication system, The first communication module is, A wireless communication system according to claim 1 or 2, comprising transmitting a network configuration formed with a wirelessly connected and authenticated second communication module to the control unit, and transmitting data received from a second communication module constituting the same network to the control unit.

4. The wireless communication system according to any one of claims 1 to 3, wherein the first communication module is a master communication module and the second communication module is a slave communication module.

5. The first communication module is, After wirelessly connecting to the second communication module, the system receives authentication data generated using a secret key from the wirelessly connected second communication module, encrypts the received authentication data, and transmits it to the wirelessly connected second communication module. The wireless communication system according to any one of claims 1 to 4, wherein the authentication procedure is performed by decrypting the encrypted authentication data with the wirelessly connected second communication module.

6. The first communication module is, A wireless communication system according to any one of claims 1 to 5, wherein when the connection with the second communication module, which is wirelessly connected and forms a network, is disconnected, it operates independently, and thereafter, when the power supply is initialized, it wirelessly connects with a new second communication module that receives power from the same power supply.

7. The first communication module and the second communication module are mounted in a single device. The wireless communication system according to any one of claims 1 to 6, wherein the same power supply is the power supply for the device.

8. The first communication module is, The wireless communication system according to claim 2, wherein the received signal strength value read from the received signal strength data is wirelessly connected to a second communication module whose received signal strength value is equal to or greater than a critical value.

9. A step of applying a power supply from the same power source to a first communication module and at least one second communication module wirelessly connected to the first communication module; The first communication module receives a wireless connection request from a second communication module that receives power from the same power source; and The first communication module includes the step of wirelessly establishing a connection with a second communication module that received the wireless connection request using the identification data included in the wireless connection request, The identification data includes RTC (Real Time Clock) data generated when the drive power supply is simultaneously applied. The aforementioned step of establishing a wireless connection is: The first communication module reads time information from the RTC data of the second communication module; and A wireless communication network configuration method, which includes the step of the first communication module wirelessly connecting with the second communication module if the time information of the second communication module read out is within an error range with respect to the time information of the first communication module.

10. The first communication module receives authentication data generated using a secret key from the second wirelessly connected communication module. The steps include: the first communication module encrypting the received authentication data and transmitting it to the wirelessly connected second communication module; and The wireless communication network configuration method according to claim 9, further comprising the step of the wirelessly connected second communication module decrypting the encrypted authentication data and performing an authentication procedure.

11. When the first communication module is disconnected from the second communication module which is wirelessly connected, it operates independently, and The wireless communication network configuration method according to claim 9 or 10, further comprising the step of wirelessly connecting the first communication module to a new second communication module to which power is supplied from the same power source when the power supply is initialized thereafter.

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