Radio station, radio communication system, and circuit switching method

Abstract

To provide a radio station with high availability connectable to different networks, a radio communication system with high availability, and a circuit switching method for improving the availability of the radio station.SOLUTION: The wireless station 41 includes a first communication circuit 51, a second communication circuit 52, a setting unit 53, a quality determination unit 54, and a switching unit 55. The first communication circuit 51 and the second communication circuit 52 transmit and receive communication data conforming to communication standards of networks different from each other. The setting unit 53 sets one of the first communication circuit 51 and the second communication circuit 52 as a main circuit and sets the other as a sub circuit. The quality determination unit 54 determines whether or not the communication quality of the main circuit satisfies a first criterion. The switching unit 55 allows the communication of the main circuit and suppresses the communication of the sub circuit when it is determined that the communication quality of the main circuit satisfies the first criterion, and allows the communication of the sub circuit and suppresses the communication of the main circuit when it is determined that the communication quality of the main circuit does not satisfy the first criterion.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a radio station, a radio communication system, and a circuit switching method. [Background technology]

[0002] In order for communication devices connected to different networks such as a LAN (Local Area Network) and a WAN (Wide Area Network) to communicate with each other, a gateway device is provided between the different networks. Patent Document 1 discloses an example of a communication device that communicates with other communication devices connected to different networks via a gateway device.

[0003] The voice communication system disclosed in Patent Document 1 includes a gateway device that connects a LAN and LTE (Long Term Evolution), a mobile phone communication network, and relays communication between a LAN communication terminal connected to the LAN and an LTE communication terminal connected to the LTE. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2017 / 006833 Summary of the Invention [Problem to be solved by the invention]

[0005] The LTE communication terminal disclosed in Patent Document 1 cannot communicate if it moves to a location outside the LTE communication range. Similarly, a LAN communication terminal cannot communicate if it moves to a location outside the communication range of an access point device. This problem is not limited to LTE communication terminals or LAN communication terminals, but can occur in communication devices connected to any network.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a highly available radio station that can be connected to different networks, a highly available radio communication system, and a circuit switching method that increases the availability of a radio station. [Means for solving the problem]

[0007] In order to achieve the above object, a radio station according to a first aspect of the present invention is a radio station connected to any one of networks in a radio communication system having a plurality of communication systems that are provided in networks with different communication standards and are communicably connected to each other, the radio station comprising: In the wireless communication system having a closed system provided in a closed network and a cloud system provided in an internet network as the communication system, the communication system is connected to either the closed network or the internet network, a first communication circuit connected to the private network and configured to transmit and receive private network data conforming to a communication standard of the private network; a second communication circuit connected to the Internet network and configured to transmit and receive communication data conforming to a communication standard of a local area network connected to the Internet network; a setting unit that sets one of the first communication circuit and the second communication circuit as a main circuit and the other of the first communication circuit and the second communication circuit as a sub-circuit in response to a setting instruction; a quality determination unit that determines whether the communication quality of the main circuit satisfies a first standard; a switching unit that, when the quality determination unit determines that the communication quality of the main circuit satisfies the first standard, allows communication of the main circuit and inhibits communication of each of the sub-circuits, and, when the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard, allows communication of any of the sub-circuits and inhibits communication of the main circuit; Equipped with.

[0008] Preferably, the switching unit allows communication of the sub-circuit and suppresses communication of the main circuit when the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard, and then allows communication of the main circuit again, and when the quality determination unit determines that the communication quality of the main circuit satisfies the first standard, allows communication of the main circuit and suppresses communication of the sub-circuit.

[0009] Preferably, the quality determination unit further determines whether the communication quality of the sub-circuit satisfies a second standard; When the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard and allows communication of the sub-circuit and suppresses communication of the main circuit, the switching unit then allows communication of the main circuit and suppresses communication of the sub-circuit if the quality determination unit determines that the communication quality of the sub-circuit does not satisfy the second standard.

[0010] Preferably, the switching unit inhibits communication of the first communication circuit by instructing the first communication circuit to operate in a power save mode.

[0011] Preferably, the switching unit stops operation of the second communication circuit to suppress communication of the second communication circuit.

[0012] A wireless communication system according to a second aspect of the present invention includes a closed system provided in a closed network, a cloud system provided on an internet network and communicably connected to the closed system; the plurality of wireless stations connected to either the closed network or the Internet; Equipped with.

[0013] Preferably, the closed system comprises: a call control server that controls communications between a plurality of wireless stations; a closed-side activation server that, upon receiving an authentication request including specific information that uniquely identifies the wireless station from the wireless station connected to the closed network, stores activation information including the specific information in a storage device provided in at least one of the closed system and the cloud system; In the wireless station, when the first communication circuit for transmitting and receiving the closed network data is set to the main circuit, the switching unit included in the wireless station starts up the first communication circuit and keeps the second communication circuit in a stopped state when the wireless station is started up; The first communication circuit included in the wireless station transmits the authentication request including the stored unique information to the closed-side activation server.

[0014] Preferably, the cloud system further comprises a cloud-side provisioning server that, upon receiving a provisioning request including the unique information from the wireless station connected to the closed network or the Internet network, transmits a provisioning response to the wireless station, the provisioning response including connection information for connecting to the call control server, based on the activation information of the wireless station stored in the storage device; After transmitting the authentication request, the first communication circuit included in the wireless station transmits the provisioning request including the unique information to the cloud-side provisioning server.

[0015] Preferably, the closed network system further comprises a closed-network side gateway server that is provided in correspondence with the call control server, holds correspondence between the radio stations and the call control servers, and, upon receiving a registration request or voice data including the unique information from a radio station connected to the closed network, transmits the registration request or the voice data to the call control server that is associated with the radio station, and, upon receiving a registration response or voice data from the call control server, transmits the registration response or the voice data to the radio station; After transmitting the provisioning request, the first communication circuit provided in the wireless station transmits the registration request including the unique information to the closed-side activation, and then transmits the voice data to the closed-side activation.

[0016] A circuit switching method according to a third aspect of the present invention is a circuit switching method performed by a radio station in a radio communication system having a plurality of communication systems that are provided in networks with different communication standards and that are connected to each other so as to be able to communicate with each other, the radio communication system having a closed system provided in a closed network and a cloud system provided in an Internet network as the communication systems, the circuit switching method being performed by a radio station that is connected to either the closed network or the Internet network, the first communication circuit connected to the closed network and transmitting and receiving closed network data that is compliant with the communication standard of the closed network, and the second communication circuit connected to the Internet network and transmitting and receiving communication data that is compliant with the communication standard of a local area network that is connected to the Internet network, a setting step of setting one of the first communication circuit and the second communication circuit as a main circuit and the other of the first communication circuit and the second communication circuit as a sub-circuit in response to a setting instruction; a quality determination step of determining whether the communication quality of the main circuit satisfies a first standard; a circuit switching step of allowing communication of the main circuit and suppressing communication of each of the sub-circuits when it is determined in the quality determination step that the communication quality of the main circuit satisfies the first standard, and allowing communication of any of the sub-circuits and suppressing communication of the main circuit when it is determined in the quality determination step that the communication quality of the main circuit does not satisfy the first standard; Equipped with. [Effects of the Invention]

[0017] A wireless station according to the present invention comprises a first communication circuit connected to a closed network and a second communication circuit connected to the Internet, with one of the first and second communication circuits designated as a main circuit and the other designated as a sub-circuit. When the wireless station determines that the communication quality of the main circuit satisfies a first criterion, it allows communication through the main circuit and suppresses communication through the sub-circuit. When the wireless station determines that the communication quality of the main circuit does not satisfy the first criterion, it allows communication through one of the sub-circuits and suppresses communication through the main circuit. Since it is possible to switch communication circuits depending on the communication quality and perform communication, a wireless station with high availability is obtained. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a block diagram showing an overview of a wireless communication system according to an embodiment. [Figure 2] FIG. 1 is a block diagram showing a configuration of a wireless communication system according to an embodiment. [Figure 3] FIG. 1 is a block diagram showing a configuration of a radio station according to an embodiment; [Figure 4] 1 is a flowchart showing an example of a startup process performed by a wireless station according to an embodiment; [Figure 5] 1 is a flowchart showing an example of a startup configuration process performed by a wireless station according to an embodiment; [Figure 6] 1 is a flowchart showing an example of a first circuit switching process performed by a wireless station according to an embodiment. [Figure 7] 1 is a flowchart showing an example of a second circuit switching process performed by a wireless station according to an embodiment. [Figure 8] FIG. 1 is a block diagram showing a hardware configuration for realizing a wireless station, a closed system, and a cloud system according to an embodiment. [Figure 9] FIG. 1 is a block diagram showing a modification of a hardware configuration for realizing a wireless station, a closed system, and a cloud system according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] A radio station, a radio communication system, and a circuit switching method according to embodiments of the present invention will be described in detail below with reference to the drawings, in which the same or equivalent parts are designated by the same reference numerals.

[0020] 1 includes a plurality of communication systems that are provided in networks with different communication standards and are connected to each other so that they can communicate with each other. As an example, the wireless communication system 1 includes, as communication systems, a closed system 11 provided in a closed network 10 and a cloud system 21 provided in an Internet network 20. The wireless communication system 1 relays communications between wireless stations 41 and 42 that are connected to either the closed network 10 or the Internet network 20.

[0021] As an example, the wireless stations 41 and 42 are IP (Internet Protocol) transceivers that perform voice communication. The wireless stations 41 and 42 have the same configuration and function. In the example of FIG. 1, both the wireless stations 41 and 42 are connected to a private network 10 via a base station 31, or connected to an Internet network 20 via a WLAN (Wireless Local Area Network) device 32. The WLAN device 32 is, for example, an access point device. Both the wireless stations 41 and 42 are located within the communication range of the base station 31 and within the communication range of the WLAN device 32. As an example, the wireless station 41 connected to the private network 10 via the base station 31 communicates with the wireless station 42 connected to the Internet network 20 via the WLAN device 32.

[0022] 2, the closed system 11 includes a call control server 12, a closed-side gateway server 13, a closed-side DNS (Domain Name System) server 14, a closed-side activation server 15, a router 16, and a storage device 17. The cloud system 21 includes a cloud-side gateway server 22, a cloud-side provisioning server 23, a cloud-side activation server 24, an endpoint device 25, a dedicated connection device 26, and a storage device 27.

[0023] The closed system 11 and the cloud system 21 are connected to each other by a dedicated line. The dedicated connection device 26 connects each of the cloud side devices included in the cloud system 21 to the closed side devices included in the closed system 11 and the closed network 10 by a dedicated line. The closed side devices are the components of the closed system 11 described above, specifically, the call control server 12, the closed side gateway server 13, the closed side DNS server 14, the closed side activation server 15, the router 16, and the storage device 17. The cloud side devices are the components of the cloud system 21, specifically, the cloud side gateway server 22, the cloud side provisioning server 23, the cloud side activation server 24, the endpoint device 25, the dedicated connection device 26, and the storage device 27. Note that the term "device" refers to not only physically existing devices but also virtual devices.

[0024] The closed system 11 includes any number of call control servers 12. Each call control server 12 controls communications between wireless stations 41 and 42, specifically, controls outgoing, incoming, and outgoing calls. Each wireless station 41 and 42 is associated with one of the call control servers 12.

[0025] The closed-side gateway server 13 holds a correspondence between the wireless station 41 and the call control server 12. As an example, the closed-side gateway server 13 holds a table that associates unique information that uniquely identifies the wireless station 41 with the address of the call control server 12. The unique information that uniquely identifies the wireless station 41 is, for example, an IMEI (International Mobile Equipment Identifier) ​​or an ICCID (Integrated Circuit Card Identifier), which is an identification number of a SIM (Subscriber Identity Module) card inserted in the wireless station 41.

[0026] When the closed-side gateway server 13 receives a registration request or voice data from a wireless station 41 connected to the closed network 10 via the router 16, it decrypts the received registration request or voice data and transmits it to the call control server 12 associated with the wireless station 41. When the closed-side gateway server 13 receives a registration response or voice data from the call control server 12, it encrypts the received registration response or voice data and transmits it to the destination wireless station 41 via the router 16.

[0027] The closed-side DNS server 14 performs name resolution for closed-side devices included in the closed system 11 and for cloud-side devices included in the cloud system 21. The closed-side devices that are the targets of name resolution by the closed-side DNS server 14 are, for example, the closed-side gateway server 13 and the closed-side activation server 15. The cloud-side devices that are the targets of name resolution by the closed-side DNS server 14 are, for example, the dedicated connection device 26.

[0028] In detail, when the closed-side DNS server 14 receives a name resolution request including a domain name of a closed-side device included in the closed system 11 or a cloud-side device included in the cloud system 21 from a wireless station 41 connected to the closed network 10, the closed-side DNS server 14 performs name resolution of the domain name included in the name resolution request and transmits a name resolution response including a corresponding address corresponding to the domain name to the wireless station 41.

[0029] When the closed-side activation server 15 receives an authentication request including the unique information of the wireless station 41 and the generation information of the encryption key from the wireless station 41 connected to the closed network 10, the closed-side activation server 15 stores the activation information including the unique information and the generation information in a storage device provided in at least one of the closed system 11 and the cloud system 21, for example, in the storage devices 17 and 27 provided in the closed system 11 and the cloud system 21, respectively. The generation information is, for example, a different hash value associated with each of the wireless stations 41 and 42.

[0030] The storage device 17 is a DB server, for example, a NoSQL server, that stores activation information.

[0031] The router 16 transmits data received from the cloud system 21 or the closed network 10 to a closed-side device included in the closed system 11 or a cloud-side device included in the cloud system 21, depending on the destination of the data. As an example, the router 16 transmits data received from a closed-side device to the cloud system 21 or the closed network 10, depending on the destination of the data.

[0032] The dedicated connection device 26 has, for example, a virtual interface connected via a dedicated line to the closed system 11. The dedicated connection device 26 transmits data received from the closed system 11 having the above configuration or data received from the closed network 10 via the router 16 to a cloud-side device included in the cloud system 21 depending on the type of data.

[0033] In detail, data transmitted from a wireless station 41 connected to the closed network 10 or a closed-side device included in the closed system 11 reaches the dedicated connection device 26. The dedicated connection device 26 transfers the received data to a cloud-side device depending on the type of the data. For example, when the dedicated connection device 26 receives a provisioning request from the wireless station 41, it transfers the provisioning request to the cloud-side provisioning server 23. Furthermore, the dedicated connection device 26 transmits data received from a cloud-side device included in the cloud system 21 to the closed system 11 via the virtual interface, or to the closed network 10 via the router 16 of the closed system 11 depending on the destination of the data.

[0034] The endpoint device 25 is an interface that connects the cloud system 21 and the Internet network 20. The endpoint device 25 transmits data received from the Internet network 20 to each device in the cloud system 21. In particular, the endpoint device 25 forwards various requests received from the Internet network 20, specifically, activation requests, provisioning requests, and registration requests, to devices according to the request types, namely, the cloud-side activation server 24, the cloud-side provisioning server 23, and the cloud-side gateway server 22. The endpoint device 25 also forwards data addressed to the wireless station 42 that is received from each device in the cloud system 21 to the wireless station 42 via the Internet network 20.

[0035] The cloud-side gateway server 22 holds a correspondence between the wireless station 42 and the call control server 12. As an example, the cloud-side gateway server 22 holds a table that associates unique information that uniquely identifies the wireless station 42 with the address of the call control server 12. The unique information that uniquely identifies the wireless station 42 is, for example, the IMEI, an ICCID that is the identification number of the SIM card inserted in the wireless station 42, or the like.

[0036] When the cloud-side gateway server 22 receives a registration request or voice data from a wireless station 42 connected to the Internet network 20, it decrypts the received registration request or voice data and transmits it to the call control server 12 associated with the wireless station 42. When the cloud-side gateway server 22 receives a registration response or voice data from the call control server 12, it encrypts the received registration response or voice data and transmits it to the wireless station 42 as the destination.

[0037] When the cloud-side provisioning server 23 receives a provisioning request from the wireless stations 41 and 42, it transmits a provisioning response including the domain name of the gateway server to the wireless stations.

[0038] When the cloud-side activation server 24 receives an authentication request from a wireless station 42 connected to the Internet network 20, the activation information including the wireless station 42's unique information and encryption key generation information is stored in a storage device provided in at least one of the closed system 11 and the cloud system 21, for example, in storage devices 17 and 27 provided in the closed system 11 and the cloud system 21, respectively.

[0039] The storage device 27 is a DB server, such as a NoSQL server, that stores activation information. As an example, the storage device 27 is a master DB, and the activation information stored in the storage device 27 is periodically updated in the storage device 17, which is a replica DB.

[0040] The configuration of radio stations 41, 42 that communicate via the radio communication system 1 having the above configuration is shown in Fig. 3. The radio stations 41, 42 are connected to different networks and include multiple communication circuits that transmit and receive communication data in accordance with the communication standards of the networks. In detail, the radio stations 41, 42 include a first communication circuit 51 and a second communication circuit 52 as communication circuits. The radio stations 41, 42 include a setting unit 53, a quality determination unit 54, a switching unit 55, a data processing circuit 56, an input circuit 57, and an output circuit 58.

[0041] The first communication circuit 51 is connected to the private network 10 and transmits and receives private network data that conforms to the communication standard of the private network 10. The second communication circuit 52 is connected to the Internet network 20 via the WLAN device 32 and transmits and receives communication data that conforms to the communication standard of the Internet network 20.

[0042] In response to a setting instruction, the setting unit 53 sets one of the communication circuits, specifically one of the first communication circuit 51 and the second communication circuit 52, as a main circuit, and sets the other communication circuit, specifically the other of the first communication circuit 51 and the second communication circuit 52, as a sub-circuit. The setting instruction is an instruction output by a user operating an operation unit (not shown), an instruction input from a setting tool for configuring the wireless stations 41 and 42, setting information included in a provisioning response obtained from the cloud-side provisioning server 23, etc.

[0043] The quality determination unit 54 determines whether the communication quality of the main circuit satisfies a first standard. Preferably, the quality determination unit 54 further determines whether the communication quality of the sub-circuit satisfies a second standard. The first standard may be set based on the communication quality required for voice communication via the main circuit when the first communication circuit 51 is set as the main circuit and when the second communication circuit 52 is set as the main circuit. The first standard may be set in response to a setting instruction. Similarly, the second standard may be set based on the communication quality required for voice communication via the sub-circuit when the first communication circuit 51 is set as the sub-circuit and when the second communication circuit 52 is set as the sub-circuit. For example, the first standard for the main circuit may be set higher than the second standard for the sub-circuit.

[0044] When the switching unit 55 determines that the communication quality of the main circuit satisfies the first standard, it allows communication of the main circuit and suppresses communication of each of the sub-circuits, and when it determines that the communication quality of the main circuit does not satisfy the second standard, it allows one of the sub-circuits and suppresses communication of the main circuit.

[0045] The data processing circuit 56 generates closed network data to be transmitted from the first communication circuit 51 or communication data to be transmitted from the second communication circuit 52 from the transmission data generated by the input circuit 57. The data processing circuit 56 also generates received data from the closed network data received by the first communication circuit 51 or the communication data received by the second communication circuit 52, and outputs the received data to the output circuit 58.

[0046] The input circuit 57 acquires audio from a microphone (not shown), performs signal processing such as AD (Analog-to-Digital) conversion, noise filtering, and amplification, generates data for transmission, and sends the generated data for transmission to the data processing circuit 56.

[0047] The output circuit 58 performs signal processing such as noise filtering, amplification, and DA (Digital-to-Analog) conversion on the received data acquired from the data processing circuit 56 to generate audio data, and outputs the generated audio data from a speaker (not shown). The output circuit 58 may also acquire processing results such as activation, provisioning, and registration from the data processing circuit 56 and display them on a screen (not shown).

[0048] When the wireless stations 41, 42 having the above configuration start up, for example when the power is turned on, they start the startup process shown in Fig. 4. By performing the startup process, the wireless stations 41, 42 can start voice communication. As an example, when the wireless stations 41, 42 start up, one of the first communication circuit 51 and the second communication circuit 52 is set as the main circuit by operating the operation unit. Since the operations of the wireless stations 41, 42 are similar, the operation of the wireless station 41 will be described below.

[0049] When the first communication circuit 51 is set as the main circuit (step S11; Yes), the switching unit 55 activates the first communication circuit 51 and deactivates the second communication circuit 52 (step S12). Note that activation of an already activated communication circuit or deactivation of an already deactivated communication circuit means that the state of the communication circuit is maintained.

[0050] If the wireless station 41 can connect to the private network 10, specifically, if it is within the range of the base station 31 (step S13; Yes), the first communication circuit 51 acquires an IP for the private network 10 from the base station 31 (step S14). More specifically, the first communication circuit 51 is assigned an IP for the private network 10 by the base station 31 through PDP (Packet Data Protocol) authentication. When the processing of step S14 is completed, the wireless station 41 can connect to the private network 10 by the first communication circuit 51 and communicate.

[0051] During communication by the first communication circuit 51, the quality determination unit 54 determines the communication quality of the first communication circuit 51, which is the main circuit (step S15). Specifically, the quality determination unit 54 determines the RSRQ (Reference Signal Received Quality) of the signal received by the first communication circuit 51. The quality determination unit 54 determines whether the communication quality determined in step S15 satisfies a first standard defined in association with the first communication circuit 51 (step S16). If the quality determination unit 54 determines that the communication quality determined in step S15 satisfies the first standard (step S16; Yes), the wireless station 41 performs startup configuration processing including activation, provisioning, and registration (step S17).

[0052] When the first communication circuit 51 is set as the main circuit and can be connected to the private network 10, the startup setting process is performed in step S17 as described above. When the second communication circuit 52 is set as the main circuit (step S11; No), when the wireless station 41 cannot be connected to the private network 10, specifically when it is out of range of the base station 31 (step S13; No), or when the quality determination unit 54 determines that the communication quality calculated in step S15 does not satisfy the first standard (step S16; No), the switching unit 55 starts up the first communication circuit 51 and the second communication circuit 52 (step S18). The switching unit 55 supplies unique information, specifically, the IMEI and ICCID stored in the SIM card attached to the first communication circuit 51, from the first communication circuit 51 to the second communication circuit 52 (step S19).

[0053] The second communication circuit 52 acquires a list of destination addresses. Specifically, the second communication circuit 52 acquires a beacon from the WLAN device 32 and acquires the address of the WLAN device 32 contained in the beacon. If a destination exists (step S20; Yes), the wireless station 41 can connect to the Internet network 20 via the second communication circuit 52 and communicate. During communication via the second communication circuit 52, the quality determination unit 54 determines the communication quality of the second communication circuit 52, which is a sub-circuit (step S21). Specifically, the quality determination unit 54 determines the RSSI (Received Signal Strength Indicator) of the signal received by the second communication circuit 52.

[0054] The quality determination unit 54 determines whether the communication quality determined in step S21 satisfies a second standard (step S22). If the quality determination unit 54 determines that the communication quality determined in step S21 satisfies the second standard (step S22; Yes), the wireless station 41 performs startup configuration processing including activation, provisioning, and registration (step S23). If the wireless station 41 cannot connect to the Internet network 20, specifically, if there is no connection destination (step S20; No), or if the quality determination unit 54 determines that the communication quality determined in step S21 does not satisfy the second standard (step S22; No), the switching unit 55 activates the first communication circuit 51 and deactivates the second communication circuit 52 (step S12). Thereafter, the above-mentioned processing is repeated.

[0055] Details of the startup setting process in steps S17 and S23 are shown in Fig. 5. Note that the wireless station 41 performs the startup setting process by communication using the first communication circuit 51 in step S17 of Fig. 4, and performs the startup setting process by communication using the second communication circuit 52 in step S23.

[0056] 5, the wireless station 41 performs activation, which is a setting when the wireless station 41 starts to be used (step S31). In detail, the wireless station 41 transmits a name resolution request including the domain name of the closed-side activation server 15, which is the destination of the activation request, to the closed-side DNS server 14. Upon receiving the name resolution request including the domain name of the closed-side activation server 15, the closed-side DNS server 14 transmits a name resolution response including the address of the closed-side activation server 15 to the wireless station 41. Upon receiving the name resolution response, the wireless station 41 transmits an activation request to the closed-side activation server 15. Upon receiving the activation request, the closed-side activation server 15 transmits an activation response including a token to the wireless station 41.

[0057] When the wireless station 41 receives the activation response, it extracts the token included in the activation response and transmits an authentication request including the wireless station 41's unique information, the token, and encryption key generation information to the closed-side activation server 15. When the closed-side activation server 15 receives the authentication request, it performs a parameter check based on the wireless station 41's unique information and token included in the authentication request to determine whether the authentication request is normal. If the closed-side activation server 15 determines that the authentication request is normal, it stores activation information including the wireless station 41's unique information and generation information in the storage device 27.

[0058] When the storage device 27 is the master DB and the storage device 17 is the replica DB, if the closed-side activation server 15 stores the activation information only in the storage device 27, the activation information will be stored in both the storage devices 17 and 27. The closed-side activation server 15 then transmits an authentication response. Note that, for example, if the storage device 27 cannot be accessed and the storage of the activation information does not end normally, the closed-side activation server 15 does not transmit the authentication response but instead transmits an error notification, for example, a notification that the activation has been aborted, to the wireless station 41.

[0059] When the activation process has not ended normally (step S32; No), for example, when an error notification is received from the closed-side activation server 15, the wireless station 41 displays on the screen that an error has occurred (step S40). When the activation process has ended normally (step S32; Yes), specifically, when an authentication response is received from the closed-side activation server 15, the wireless station 41 performs a provisioning process to acquire connection information (step S33). In detail, the wireless station 41 transmits a name resolution request including the domain name of the cloud-side provisioning server 23 that is the destination of the provisioning request to the closed-side DNS server 14.

[0060] When the closed-side DNS server 14 receives the name resolution request including the domain name of the dedicated connection device 26, it transmits a name resolution response including the address of the dedicated connection device 26 to the wireless station 41. When the wireless station 41 receives the name resolution response, it transmits a provisioning request addressed to the cloud-side provisioning server 23 including information unique to the wireless station 41 to the dedicated connection device 26. When the dedicated connection device 26 receives the provisioning request, it forwards the provisioning request to the cloud-side provisioning server 23.

[0061] Upon receiving the provisioning request, the cloud-side provisioning server 23 acquires activation information of the wireless station 41 from the storage device 27 using the unique information of the wireless station 41 included in the provisioning request. Based on the acquired activation information, the cloud-side provisioning server 23 performs an inspection to determine whether activation of the wireless station 41 has been performed normally. If activation has been performed normally, the cloud-side provisioning server 23 transmits a provisioning response addressed to the wireless station 41 to the dedicated connection device 26. The provisioning response includes connection information for connecting to the closed-side gateway server 13 associated with the call control server 12 corresponding to the wireless station 41. Upon receiving the provisioning response, the dedicated connection device 26 forwards the provisioning response to the wireless station 41, which is the destination. Note that, for example, if the storage device 27 cannot be accessed and activation information cannot be acquired, the cloud-side provisioning server 23 does not transmit the provisioning response, but instead transmits an error notification addressed to the wireless station 41 to the dedicated connection device 26. Upon receiving the error notification, the dedicated connection device 26 forwards the error notification to the wireless station 41.

[0062] When the provisioning process has not ended normally (step S34; No), for example, when an error notification is received from the cloud-side provisioning server 23 or when the wireless station 41 is unable to connect to the cloud-side provisioning server 23, the wireless station 41 determines whether or not previous information, which is connection information acquired when the previous startup process was performed, is available (step S35). If previous information is not available (step S35; No), the wireless station 41 displays on the screen that an error has occurred (step S40).

[0063] If the provisioning process did not end normally but previous information exists (step S34; No, step S35; Yes), or if the provisioning process ended normally (step S34; Yes), the wireless station 41 reflects the connection information or previous information acquired in step S33 as connection information in its own device (step S36).

[0064] Next, the wireless station 41 performs registration to store information about its own device in the call control server 12 (step S37). In detail, the wireless station 41 transmits a name resolution request including the domain name of the closed-side gateway server 13, which is the destination of the registration request, to the closed-side DNS server 14. Upon receiving the name resolution request including the domain name of the closed-side gateway server 13, the closed-side DNS server 14 transmits a name resolution response including the address of the closed-side gateway server 13 to the wireless station 41. Upon receiving the name resolution response, the wireless station 41 transmits a registration request to the closed-side gateway server 13. Upon receiving the registration request, the closed-side gateway server 13 transmits the registration request to the call control server 12 corresponding to the wireless station 41. The closed-side gateway server 13 holds the sender address of the registration request and the unique information of the wireless station 41 included in the registration request in association with each other.

[0065] When the call control server 12 receives the registration request, it transmits a registration response including unique information of the wireless station 41 to the closed-side gateway server 13, which is the sender of the registration request. When the closed-side gateway server 13 receives the registration response, it transmits the registration response to the wireless station 41.

[0066] When the registration process is not completed normally (step S38; No), for example, when the radio station 41 does not receive a registration response from the closed-side gateway server 13 within a certain time, the radio station 41 displays on the screen a message that an error has occurred (step S40). The certain time may be determined based on the time required from transmitting a registration request under normal circumstances to receiving a registration response, the length of an acceptable downtime, etc. When the registration process is completed normally (step S38; Yes), specifically, when the radio station 41 receives a registration response from the closed-side gateway server 13, the radio station 41 displays on the screen a message that the startup process has been completed normally (step S39). When the process of displaying on the screen a message that the startup process has been completed normally in step S39 is completed, the radio station 41 is able to start voice communication. When steps S39 and S40 are completed, the radio station 41 ends the startup process.

[0067] 3, the same applies to the startup setting process performed by the wireless station 41 through communication using the second communication circuit 52. Details of the activation, provisioning, and registration processes performed by the wireless station 41 using the second communication circuit 52 will be described below.

[0068] In step S31, wireless station 41 transmits a name resolution request including the domain name of endpoint device 25, which is the destination of the activation request, to an Internet DNS server (not shown in Fig. 1) on Internet network 20. Upon receiving the name resolution request including the domain name of endpoint device 25, the Internet DNS server transmits a name resolution response including the address of endpoint device 25 to wireless station 41.

[0069] Upon receiving the name resolution response, wireless station 41 transmits an activation request to endpoint device 25. Upon receiving the activation request, endpoint device 25 transfers the activation request to cloud-side activation server 24. Upon receiving the activation request, cloud-side activation server 24 transmits an activation response addressed to wireless station 42, including the token, to endpoint device 25. Upon receiving the activation response, endpoint device 25 transfers the activation response to the destination wireless station 41.

[0070] Upon receiving the activation response, the wireless station 41 extracts the token from the activation response and transmits an authentication request including the wireless station 41's unique information and the token to the endpoint device 25. Upon receiving the authentication request, the endpoint device 25 forwards the authentication request to the cloud-side activation server 24. Upon receiving the authentication request, the cloud-side activation server 24 performs a parameter check to determine whether the authentication request is valid based on the wireless station 41's unique information and token included in the authentication request. If the cloud-side activation server 24 determines that the authentication request is valid, it stores activation information including the wireless station 41's unique information and generation information in the storage device 27. Thereafter, the cloud-side activation server 24 transmits the authentication response. Upon receiving the authentication response, the endpoint device 25 forwards the authentication response to the destination wireless station 41. If, for example, storage device 27 cannot be accessed and storage of activation information does not end normally, cloud-side activation server 24 does not send an authentication response, but instead sends an error notification, for example, a notification that activation has been canceled, to endpoint device 25. Upon receiving the error notification, endpoint device 25 forwards the error notification to wireless station 41, which is the destination.

[0071] In step S33, the wireless station 41 transmits a name resolution request including the domain name of the endpoint device 25, which is the destination of the provisioning request, to the Internet DNS server. Upon receiving the name resolution request including the domain name of the endpoint device 25, the Internet DNS server transmits a name resolution response including the address of the endpoint device 25 to the wireless station 41. Upon receiving the name resolution response, the wireless station 41 transmits a provisioning request addressed to the cloud-side provisioning server 23, including information unique to the wireless station 41, to the endpoint device 25. Upon receiving the provisioning request, the endpoint device 25 transfers the provisioning request to the cloud-side provisioning server 23.

[0072] Upon receiving the provisioning request, the cloud-side provisioning server 23 acquires activation information of the wireless station 41 from the storage device 27 using the unique information of the wireless station 41 included in the provisioning request. Based on the acquired activation information, the cloud-side provisioning server 23 performs a check to determine whether activation of the wireless station 41 has been performed successfully. If activation has been performed successfully, the cloud-side provisioning server 23 transmits a provisioning response addressed to the wireless station 41 to the endpoint device 25. The provisioning response includes connection information for connecting to the call control server 12 corresponding to the wireless station 41. Upon receiving the provisioning response, the endpoint device 25 forwards the provisioning response to the destination wireless station 41. Note that, for example, if the cloud-side provisioning server 23 is unable to access the storage device 27 and is therefore unable to acquire the activation information, the cloud-side provisioning server 23 does not transmit the provisioning response and instead transmits an error notification to the endpoint device 25. Upon receiving the error notification, the endpoint device 25 forwards the error notification to the wireless station 41.

[0073] In step S37, wireless station 41 transmits a name resolution request including the domain name of endpoint device 25, which is the destination of the registration request, to the Internet DNS server. Upon receiving the name resolution request including the domain name of endpoint device 25, the Internet DNS server transmits a name resolution response including the address of endpoint device 25 to wireless station 41. Upon receiving the name resolution response, wireless station 41 transmits a registration request to endpoint device 25. Upon receiving the registration request, endpoint device 25 transfers the registration request to cloud-side gateway server 22.

[0074] Upon receiving the registration request, the cloud-side gateway server 22 acquires activation information of the wireless station 41 from the storage device 27 using the unique information of the wireless station 41 included in the registration request. The cloud-side gateway server 22 stores the acquired activation information, specifically, the association between the unique information of the wireless station 41 and the generated information, in its own device. The cloud-side gateway server 22 generates a registration request addressed to the call control server 12 corresponding to the wireless station 41 and transmits the registration request to the dedicated connection device 26. The cloud-side gateway server 22 stores the sender address of the registration request and the unique information of the wireless station 41 included in the registration request in association with each other. Upon receiving the registration request, the dedicated connection device 26 forwards the registration request to the call control server 12.

[0075] Upon receiving the registration request, the call control server 12 transmits a registration response, which includes unique information of the wireless station 41 and is addressed to the cloud-side gateway server 22 that sent the registration request, to the dedicated connection device 26. Upon receiving the registration response, the dedicated connection device 26 forwards the registration response to the cloud-side gateway server 22. Upon receiving the registration response, the cloud-side gateway server 22 generates a registration response addressed to the wireless station 41 and transmits the registration response to the endpoint device 25. Upon receiving the registration response, the endpoint device 25 forwards the registration response to the wireless station 41, which is the destination.

[0076] When the startup setting process of the wireless station 41 is completed as described above, the wireless station 41 becomes able to perform voice communication using the first communication circuit 51 or the second communication circuit 52. If the communication quality of the main circuit subsequently deteriorates, the wireless station 41 switches to the sub-circuit and continues communication. The first switching process, which is a switching process that the wireless station 41 continues to perform after the startup process is completed when the first communication circuit 51 is set as the main circuit and the second communication circuit 52 is set as the sub-circuit, will be described below with reference to FIG. 6.

[0077] The wireless station 41 communicates using the first communication circuit 51 (step S41). During communication using the first communication circuit 51, the quality determination unit 54 determines the communication quality of the first communication circuit 51, which is the main circuit (step S42). Specifically, the quality determination unit 54 determines the RSRQ of the signal received by the first communication circuit 51. The quality determination unit 54 determines whether the communication quality determined in step S42 satisfies a first standard associated with the first communication circuit 51 (step S43). If the quality determination unit 54 determines that the communication quality determined in step S42 satisfies the first standard (step S43; Yes), the process returns to step S41, and communication using the first communication circuit 51, which is the main circuit, continues. If the quality determination unit 54 determines that the communication quality determined in step S42 does not satisfy the first standard (step S43; No), the switching unit 55 activates the second communication circuit 52 (step S44).

[0078] The second communication circuit 52 acquires a list of destination addresses. If the wireless station 41 cannot connect to the Internet network 20, specifically, if there is no destination (step S45; No), the process returns to step S41, and communication continues using the first communication circuit 51, which is the main circuit. If the wireless station 41 can connect to the Internet network 20, specifically, if there is a destination (step S45; Yes), the wireless station 41 can connect to the Internet network 20 via the second communication circuit 52 and communicate.

[0079] The quality determination unit 54 determines the communication quality of the second communication circuit 52, which is a sub-circuit (step S46). More specifically, the quality determination unit 54 determines the RSSI of the signal received by the second communication circuit 52. The quality determination unit 54 determines whether the communication quality determined in step S21 satisfies a second standard defined in association with the second communication circuit 52 (step S47). If the quality determination unit 54 determines that the communication quality determined in step S46 does not satisfy the second standard (step S47; No), the process returns to step S41, and communication using the first communication circuit 51, which is the main circuit, continues. If the quality determination unit 54 determines that the communication quality determined in step S46 satisfies the second standard (step S47; Yes), the switching unit 55 instructs the first communication circuit 51 to operate in power save mode (step S48). When the first communication circuit 51 switches to the power save mode, it stops communication.

[0080] As described above, by starting the second communication circuit 52 and switching the first communication circuit 51 to the power save mode, the wireless station 41 communicates using the second communication circuit 52 (step S49). When starting communication using the second communication circuit 52, the wireless station 41 performs the registration process shown in step S37 of FIG.

[0081] The switching unit 55 has a timer (not shown) and measures the elapsed time since the first communication circuit 51 was instructed to operate in the power save mode. As shown in FIG. 6, the switching unit 55 determines whether the measurement time has reached a determination period (step S50). The switching unit 55 repeats the process of step S50 until the measurement time has reached the determination period (step S50; No). When the measurement time has reached the determination period (step S50; Yes), the switching unit 55 clears the timer and starts up the first communication circuit 51 (step S51). In detail, the switching unit 55 instructs the first communication circuit 51 to switch from the power save mode to the normal mode. Since the first communication circuit 51 is not stopped but is in the power save mode, it starts up promptly.

[0082] If the wireless station 41 cannot connect to the private network 10, specifically, if it is out of the range of the base station 31 (step S52; No), the process returns to step S49, and communication using the second communication circuit 52, which is a sub-circuit, continues. If the wireless station 41 can connect to the private network 10, specifically, if it is within the range of the base station 31 (step S52; Yes), the first communication circuit 51 acquires an IP address of the private network 10 from the base station 31 (step S53). The switching unit 55 stops the second communication circuit 52 (step S54). Thereafter, the process returns to step S41, and communication using the first communication circuit 51 is performed. As described above, the wireless station 41 in which the first communication circuit 51 is set as the main circuit continues the switching process shown in FIG. 6 after the start-up process of FIG. 3 is completed.

[0083] The second switching process, which is a switching process that the wireless station 41 continues to perform after the startup process is completed when the second communication circuit 52 is set as the main circuit and the first communication circuit 51 is set as the sub-circuit, will be described below with reference to FIG. 7.

[0084] The wireless station 41 communicates using the second communication circuit 52 (step S61). During communication using the second communication circuit 52, the quality determination unit 54 determines the communication quality of the second communication circuit 52, which is the main circuit (step S62). Specifically, the quality determination unit 54 determines the RSSI of the signal received by the second communication circuit 52. The quality determination unit 54 determines whether the communication quality determined in step S62 satisfies a first standard defined in association with the second communication circuit 52 (step S63). If the quality determination unit 54 determines that the communication quality determined in step S62 satisfies the first standard (step S63; Yes), the process returns to step S61, and communication using the second communication circuit 52, which is the main circuit, continues. If the quality determination unit 54 determines that the communication quality determined in step S62 does not satisfy the first standard (step S63; No), the quality determination unit 54 activates the first communication circuit (step S64).

[0085] If the wireless station 41 cannot connect to the private network 10, specifically, if it is out of the range of the base station 31 (step S65; No), the process returns to step S61, and communication continues using the second communication circuit 52, which is the main circuit. If the wireless station 41 can connect to the private network 10, specifically, if it is within the range of the base station 31 (step S65; Yes), the first communication circuit 51 acquires the IP of the private network 10 from the base station 31 (step S66). This allows the wireless station 41 to connect to the private network 10 via the first communication circuit 51 and communicate.

[0086] During communication by the first communication circuit 51, the quality determination unit 54 determines the communication quality of the first communication circuit 51, which is a sub-circuit (step S67). More specifically, the quality determination unit 54 determines the RSRQ of the signal received by the first communication circuit 51. The quality determination unit 54 determines whether the communication quality determined in step S67 satisfies a second standard defined in association with the first communication circuit 51 (step S68). If the quality determination unit 54 determines that the communication quality determined in step S68 does not satisfy the second standard (step S68; No), the process returns to step S61, and communication using the second communication circuit 52, which is the main circuit, continues. If the quality determination unit 54 determines that the communication quality determined in step S68 satisfies the second standard (step S68; Yes), the switching unit 55 stops the second communication circuit 52 (step S69). By stopping the second communication circuit 52, communication of the second communication circuit 52 is suppressed, and the wireless station 41 communicates using the first communication circuit 51 (step S70).

[0087] The switching unit 55 has a timer (not shown) and measures the elapsed time since the second communication circuit 52 was stopped. The switching unit 55 determines whether the measurement time has reached the determination period (step S71). The switching unit 55 repeats the process of step S71 until the measurement time has reached the determination period (step S71; No). When the measurement time has reached the determination period (step S71; Yes), the switching unit 55 clears the timer and starts the second communication circuit 52 (step S72). Because the second communication circuit 52 starts up faster than the first communication circuit 51, the second communication circuit 52 starts up as quickly as the first communication circuit 51 returns from the power save mode to the normal mode.

[0088] The second communication circuit 52 acquires a list of destination addresses. If the wireless station 41 cannot connect to the Internet network 20, specifically, if there is no destination (step S73; No), the process returns to step S70, and communication continues using the first communication circuit 51, which is a sub-circuit. If the wireless station 41 can connect to the Internet network 20, specifically, if there is a destination (step S73; Yes), the switching unit 55 instructs the first communication circuit 51 to operate in power save mode (step S74). When the first communication circuit 51 switches to the power save mode, it stops communication. Since there is a destination, the wireless station 41 can connect to the Internet network 20 via the second communication circuit 52 and communicate. Thereafter, the process returns to step S61, and communication is performed using the second communication circuit 52. As described above, the wireless station 41, in which the second communication circuit 52 is set as the main circuit, continues the switching process shown in FIG. 7 after the startup process of FIG. 3 ends.

[0089] As described above, when the wireless communication system 1 according to the embodiment determines that the communication quality of the main circuit satisfies the first criterion, it allows communication of the main circuit and suppresses communication of the sub-circuit, and when it determines that the communication quality of the main circuit does not satisfy the first criterion, it allows communication of the sub-circuit and suppresses communication of the main circuit. Since communication can be performed via the first communication circuit 51 or the second communication circuit 52 depending on the communication quality, wireless stations 41, 42 and wireless communication system 1 with high availability are obtained.

[0090] The wireless communication system 1 according to the embodiment can be modified in various ways in addition to those described above. First, the number of communication circuits included in the wireless stations 41 and 42 is not limited to two, and may be any natural number equal to or greater than 2. In this case, the wireless stations 41 and 42 may have communication circuits in a number corresponding to the number of communication systems included in the wireless communication system 1.

[0091] Secondly, the closed system 11 may have any number of closed-side devices. Furthermore, the processing of each closed-side device may be distributed. As an example, the closed system 11 may have multiple closed-side gateway servers 13, and the processing performed by the closed-side gateway server 13 during registration may be load-distributed among the multiple closed-side gateway servers 13. The cloud system 21 may have any number of cloud-side devices. Furthermore, the processing of the cloud-side devices may be load-distributed. As an example, the cloud system 21 may have multiple cloud-side gateway servers 22, and the processing performed by the cloud-side gateway server 22 during registration may be load-distributed among the multiple cloud-side gateway servers 22.

[0092] Thirdly, closed-side activation server 15 may store activation information in both storage devices 27 and 17. Alternatively, wireless communication system 1 may be provided with only storage device 17.

[0093] Fourth, the wireless stations 41 and 42 communicating via the wireless communication system 1 may perform the startup process shown in FIG. 3 not only at startup but also, for example, when no call has been made for a certain period of time.

[0094] Fifth, the multiple communication systems provided in different networks in the wireless communication system 1 are not limited to the above examples. As an example, the wireless communication system 1 may have multiple closed systems. In this case, the wireless stations 41 and 42 may have a communication circuit for each closed system. As another example, the wireless communication system 1 may have a closed system and a LAN system.

[0095] An example of a hardware configuration for realizing the above-described wireless stations 41, 42 and wireless communication system 1 is shown in Fig. 8. The closed-side device included in the closed system 11 and the cloud-side device included in the cloud system 21 are realized by a processor 61, a memory 62, and an interface 63. The processor 61, the memory 62, and the interface 63 are connected to one another by a bus 60. The processor 61 includes any electronic circuit including a transistor, and is considered to be a circuit or a processor circuit.

[0096] For example, the functions of the radio stations 41 and 42, the closed side devices of the closed system 11, and the cloud side devices of the cloud system 21 are realized by software, firmware which is software embedded in electronic devices, or a combination of software and firmware. The software is written as a program and stored in the memory 62. The processor 61 executes the program stored in the memory 62 to realize the functions of the above-mentioned units. That is, the memory 62 stores programs for executing the processes of the closed side devices of the closed systems 11, 11a, and 11b and the cloud side devices of the cloud system 21.

[0097] The memory 62 includes, for example, non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read-Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable and Programmable Read-Only Memory), magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), etc.

[0098] For example, the interface 63 connects the wireless stations 41, 42 to the closed system 11 or the cloud system 21, or connects the closed system 11 to the cloud system 21, and establishes voice communication. The interface 63 has multiple types of interface modules as needed.

[0099] 8 shows one processor 61 and one memory 62, the wireless stations 41, 42, the closed side device of the closed system 11, and the cloud side device of the cloud system 21 may be realized by a plurality of processors 61 and a plurality of memories 62. In this case, the plurality of processors 61 and the plurality of memories 62 may cooperate with each other to execute the functions of the wireless stations 41, 42, the closed side device included in the closed system 11, and the cloud side device included in the cloud system 21.

[0100] The wireless stations 41 and 42, the closed-side devices included in the closed system 11, and the cloud-side devices included in the cloud system 21 may be realized by a processing circuit 71, as shown in Fig. 9. The processing circuit 71 is connected to other devices via an interface circuit 72.

[0101] When the processing circuit 71 is dedicated hardware, the processing circuit 71 includes, for example, a single circuit, a composite circuit, a processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The wireless stations 41 and 42, the closed side devices included in the closed system 11, and the cloud side devices included in the cloud system 21 may be realized by any number of processing circuits 71.

[0102] Some of the functions of the radio stations 41, 42, the closed-side device included in the closed system 11, and the cloud-side device included in the cloud system 21 may be realized by dedicated hardware, and other functions may be realized by software or firmware. For example, in the radio station 41, the setting unit 53, the quality determination unit 54, and the switching unit 55 may be realized by the processor 61 shown in Fig. 8 reading and executing programs stored in the memory 62, and the first communication circuit 51, the second communication circuit 52, the data processing circuit 56, the input circuit 57, and the output circuit 58 may be realized by the processing circuit 71 shown in Fig. 9.

[0103] Furthermore, the above-described hardware configuration and flowchart are merely examples and can be changed and modified as desired. [Explanation of symbols]

[0104] 1. Wireless communication systems 10 Closed network 11 Closed System 12 Call Control Server 13 Closed gateway server 14 Closed DNS Server 15. Closed-area activation server 16 Routers 17,27 Storage device 20 Internet Network 21 Cloud System 22 Cloud-side gateway server 23 Cloud-side provisioning server 24 Cloud-side activation server 25 Endpoint Devices 26 Dedicated connection devices 31 Base station 32 WLAN equipment 41,42 Radio Station 51 First communication circuit 52 Second communication circuit 53 Setting section 54 Quality determination section 55 Switching section 56 Data Processing Circuit 57 Input circuit 58 Output circuit 60 Bus 61 processors 62 memory 63 Interface 71 Processing circuit 72 Interface Circuit

Claims

1. In a wireless communication system having a plurality of communication systems provided in networks each of which has a different communication standard and which are connected to each other so as to be able to communicate with each other, a wireless station connected to any of the networks comprises: In the wireless communication system having a closed system provided in a closed network and a cloud system provided in an internet network as the communication system, the communication system is connected to either the closed network or the internet network, a first communication circuit connected to the private network and configured to transmit and receive private network data conforming to a communication standard of the private network; a second communication circuit connected to the Internet network and configured to transmit and receive communication data conforming to a communication standard of a local area network connected to the Internet network; a setting unit that sets one of the first communication circuit and the second communication circuit as a main circuit and the other of the first communication circuit and the second communication circuit as a sub-circuit in response to a setting instruction; a quality determination unit that determines whether the communication quality of the main circuit satisfies a first standard; a switching unit that, when the quality determination unit determines that the communication quality of the main circuit satisfies the first standard, allows communication of the main circuit and inhibits communication of each of the sub-circuits, and, when the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard, allows communication of any of the sub-circuits and inhibits communication of the main circuit; A radio station equipped with:

2. the switching unit allows communication of the sub-circuit and suppresses communication of the main circuit when the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard, and then allows communication of the main circuit again; and when the quality determination unit determines that the communication quality of the main circuit satisfies the first standard, allows communication of the main circuit and suppresses communication of the sub-circuit. The radio station according to claim 1 .

3. the quality determination unit further determines whether the communication quality of the sub-circuit satisfies a second standard; the switching unit allows communication of the sub-circuit and suppresses communication of the main circuit when the quality determination unit determines that the communication quality of the main circuit does not satisfy the first standard and then allows communication of the sub-circuit and suppresses communication of the main circuit when the quality determination unit determines that the communication quality of the sub-circuit does not satisfy the second standard; 3. The radio station according to claim 1 or 2.

4. the switching unit instructs the first communication circuit to operate in a power save mode, thereby suppressing communication of the first communication circuit.

3. The radio station according to claim 1 or 2.

5. the switching unit stops operation of the second communication circuit to suppress communication of the second communication circuit.

3. The radio station according to claim 1 or 2.

6. a closed system provided in a closed network; a cloud system provided on an internet network and communicably connected to the closed system; a plurality of wireless stations according to claim 1 or 2 connected to either the closed network or the Internet; A wireless communication system comprising:

7. The closed system comprises: a call control server that controls communications between a plurality of wireless stations; a closed-side activation server that, upon receiving an authentication request including specific information that uniquely identifies the wireless station from the wireless station connected to the closed network, stores activation information including the specific information in a storage device provided in at least one of the closed system and the cloud system; In the wireless station, in a state in which the first communication circuit for transmitting and receiving the closed network data is set to the main circuit, the switching unit included in the wireless station activates the first communication circuit and maintains the second communication circuit in a stopped state when the wireless station is started up; the first communication circuit included in the wireless station transmits the authentication request including the stored unique information to the closed-band activation server; 7. The wireless communication system according to claim 6.

8. the cloud system further comprises a cloud-side provisioning server that, upon receiving a provisioning request including the unique information from the wireless station connected to the closed network or the Internet network, transmits a provisioning response to the wireless station, the provisioning response including connection information for connecting to the call control server, based on the activation information of the wireless station stored in the storage device; the first communication circuit included in the wireless station transmits the provisioning request including the unique information to the cloud-side provisioning server after transmitting the authentication request; 8. The wireless communication system according to claim 7.

9. the closed network system further comprises a closed-network side gateway server that is provided in correspondence with the call control server, holds correspondence between the radio stations and the call control server, and, upon receiving a registration request or voice data including the unique information from a radio station connected to the closed network, transmits the registration request or the voice data to the call control server that is associated with the radio station, and, upon receiving a registration response or voice data from the call control server, transmits the registration response or the voice data to the radio station; the first communication circuit included in the wireless station transmits the registration request including the unique information to the closed-side activation after transmitting the provisioning request, and then transmits the voice data to the closed-side activation.

9. The wireless communication system according to claim 8.

10. A circuit switching method is performed by a radio station in a radio communication system having a plurality of communication systems that are provided in networks with different communication standards and that are connected to each other so as to be able to communicate with each other, the radio communication system having a closed system provided in a closed network and a cloud system provided in an Internet network as the communication systems, the radio station including: a first communication circuit that is connected to either the closed network or the Internet network and that transmits and receives closed network data that conforms to the communication standard of the closed network; and a second communication circuit that is connected to the Internet network and that transmits and receives communication data that conforms to the communication standard of a local area network that is connected to the Internet network, a setting step of setting one of the first communication circuit and the second communication circuit as a main circuit and the other of the first communication circuit and the second communication circuit as a sub-circuit in response to a setting instruction; a quality determination step of determining whether the communication quality of the main circuit satisfies a first standard; a circuit switching step of allowing communication of the main circuit and suppressing communication of each of the sub-circuits when it is determined in the quality determination step that the communication quality of the main circuit satisfies the first standard, and allowing communication of any of the sub-circuits and suppressing communication of the main circuit when it is determined in the quality determination step that the communication quality of the main circuit does not satisfy the first standard; A circuit switching method comprising:

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