JP2016092540A - Radio communications system and number issuance radio - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communications system and a number issuance radio that can avoid a communication error accompanying overlapping allocation of a radio number.SOLUTION: A radio communications system includes: a master radio and a plurality of slave radios which each have a unique identifier; and a number issuance radio which issues identification numbers for the master radio and the plurality of slave radios in a radio network formed by the master radio and the plurality of slave radios at requests from the master radio and the plurality of slave radios, and relates and stores the issued identification numbers and the identification numbers of the master radio and the plurality of slave radios as issuance destinations in a number issuance table. the number issuance radio comprising: specifying means of specifying the identifier of a slave radio excluded from the radio network and a radio number stored in the number issuance table in relation to the identification number; and notification means of informing the master radio that the same identification as the identification number specified by the specifying means is issued at a request from a slave radio connected newly to the radio network in such a case.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a wireless communication system and a number issuing wireless device that transmit a usage amount of water, gas, and the like measured by a meter to a communication device on a center side using a wireless network.

  Conventionally, in a wireless telemeter system developed for meter reading of gas, water, etc., a wireless master unit is connected to a center side device equipped with a host computer and a center network control device via a wide area wireless network such as a PHS network and a FOMA network. Connected. In addition, a plurality of wireless slave devices are connected to the wireless master device, and a meter for meter reading is connected to each of the wireless slave devices. Data such as a meter reading value obtained from the meter is transmitted from the wireless slave unit to the wireless master unit, and further transmitted from the wireless master unit to the center side device.

  In the wireless telemeter system, for example, a number issuing wireless device that issues an identifier (wireless device number) for identifying each device in a narrow area wireless network is installed. When a new wireless slave device is connected to the narrow area wireless network, the wireless slave device transmits a number issue request to the number issuing wireless device via the existing wireless slave device connected to the number issuing wireless device. The number issuing wireless device generates an issuance response including the wireless device number assigned to the requesting wireless slave device, and transmits the issued response to the requesting wireless slave device via the existing wireless slave device. The wireless master device and each wireless slave device can communicate with other devices by specifying the wireless device number issued from the number issuing wireless device as a destination.

JP 2012-244541 A

  A mesh type network is known as one of network configurations of a wireless telemeter system. In the mesh network, for example, when the device itself can receive data transmitted from the outside, a beacon is periodically transmitted to search for a wireless master device and a wireless slave device having data to be transmitted. And when the radio | wireless main | base station and radio | wireless handset which have the data which should be transmitted receive a beacon, it is set as the structure which transmits data with respect to the transmission source of the beacon.

  In the mesh type network as described above, when a beacon transmitted from a wireless master device or another wireless slave device is received, data is transmitted to the beacon transmission source when the own device has data to be transmitted. It is configured. That is, the timing at which the wireless slave device transmits data to another wireless slave device or the wireless master device depends on the communication status of each device. For this reason, between the timing when the number issuing radio is issued to the newly installed wireless slave and the timing when the information of the newly installed wireless slave is transmitted to the entire system, Inevitably, there will be a time lag.

  Here, the number of devices that can be installed in the network is limited to a finite number (for example, 256), and only the number of wireless device numbers is prepared for the number of devices that can be installed in the network. For this reason, when a wireless slave device connected in the past is removed from the network, the wireless device number assigned to the wireless slave device may be assigned to another newly connected wireless slave device.

  However, as described above, there is a time lag between the timing at which the number issuing radio issues the radio number and the timing at which the information of the newly installed wireless slave is transmitted to the entire system. The wireless slave device indicated by the wireless device number managed by the side may be different from the wireless slave device to which this wireless device number is actually assigned. For this reason, there is a possibility that data transmitted by the center side may be transmitted to a newly installed terminal without being transmitted to the intended wireless slave at the transmission source, which may cause a communication error, information leakage, etc. Had a point.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wireless communication system and a number issuing wireless device that can avoid a communication error and the like due to overlapping assignment of wireless device numbers.

  The wireless communication system of the present application includes a wireless master device and a plurality of wireless slave devices each having a unique identifier, and an identification number for identifying each in a wireless network formed by the wireless master device and the plurality of wireless slave devices. Is issued in response to a request from the wireless master device or each wireless slave device, and the issued number is associated with the identifier of the issuing wireless master device or wireless slave device and stored in a number issuing table. In the wireless communication system that performs wireless communication between the wireless master device identified by the identification number issued by the number issuing wireless device and a plurality of wireless slave devices, the number issuing wireless device is removed from the wireless network. An identifier of the selected wireless slave device, a specifying means for specifying the wireless device number associated with the identifier and stored in the number issuing table, and a request from the wireless slave device newly connected to the wireless network Correspondingly, the case where the specific means has issued the identification number and the same identification number identified, characterized in that it comprises a notifying means for notifying to that effect to the wireless master unit.

  In the wireless communication system of the present application, when the wireless master unit receives a notification from the number issuing wireless device that it has issued the same identification number as the identification number specified by the specifying unit, the wireless base unit is identified by the identification number. A means for stopping communication with the wireless slave unit is provided.

  The wireless communication system of the present application further includes a communication device communicably connected to the wireless master device via a communication network different from the wireless network, and the wireless master device is connected from the wireless slave device to the communication device. Only the predetermined communication is permitted, and when the predetermined communication is performed, the suspension of communication with the wireless slave device is canceled.

  The number issuing radio of the present application is connected to a radio network formed by a radio master unit and a plurality of radio slave units each having a unique identifier, and in response to a request from the radio master unit or each radio slave unit, In the number issuing radio that issues an identification number for identifying each in the wireless network and associates the issued identification number with the identifier of the wireless master device or the wireless slave device to be issued and stores it in the number issuing table, from the wireless network The identifier of the removed wireless slave device, the specifying means for specifying the wireless device number associated with the identifier and stored in the number issuing table, and the request from the wireless slave device newly connected to the wireless network In response, when the identification number that is the same as the identification number specified by the specifying means is issued, a notification means for notifying the wireless master unit of the same identification number is provided.

  According to the present application, it is possible to avoid a communication error or the like associated with the radio apparatus number duplication assignment.

1 is a block diagram showing an overall configuration of a radio telemeter system according to Embodiment 1. FIG. It is a block diagram which shows the internal structure of a wireless main | base station. It is a block diagram which shows the internal structure of a wireless subunit | mobile_unit. It is a block diagram which shows the internal structure of a number issuing radio | wireless machine. It is a conceptual diagram which shows an example of the number issuing table with which a number issuing radio | wireless machine is provided. 3 is a flowchart illustrating a procedure of number issuing processing in the first embodiment. 10 is a flowchart for explaining a procedure of processing executed by the wireless master device according to the second embodiment. 10 is a flowchart illustrating a procedure of processing executed by the wireless master device according to Embodiment 3. FIG. 10 is a block diagram showing an overall configuration of a radio telemeter system according to a fourth embodiment.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing the overall configuration of the radio telemeter system according to the first embodiment. The wireless telemeter system according to the present embodiment includes a host computer 11 and a center-side network control device 12 as a configuration on the center side, and a wireless master device 21, wireless slave devices 22, 22,. 22 and meters 23, 23,..., 23 and a number issuing radio 30. The meter 23 is a measuring instrument that is installed for each consumer such as a personal house, measures the amount of supply medium such as water and gas supplied from a supplier, and outputs a measurement result (meter reading value). The wireless telemeter system according to the present embodiment uses wireless communication for various data output from the terminal side, such as data indicating the meter reading value of the meter 23, data indicating the operating state of the wireless master device 21 and the wireless slave device 22, and so on. One of the features is that various data including commands for controlling operations of the wireless master device 21 and the wireless slave device 22 are transmitted from the center side to the terminal side.

  The center-side network control device 12 and the terminal-side wireless master device 21 are connected to a wide-area wireless network N1 such as a PHS network or a FOMA network, and perform wireless communication via the wide-area wireless network N1. In the example shown in FIG. 1, the number of the wireless master devices 21 connected to the wide area wireless network N <b> 1 is one, but it goes without saying that a plurality of wireless master devices 21 may be connected. .

  The center-side network control device 12 is provided, for example, in a base station of a communication carrier and has a function of controlling communication with the terminal side via the wide area wireless network N1. When data to be transmitted from the host computer 11 to the terminal side is input from the host computer 11, the center side network control device 12 transmits the data to the terminal side by a communication method compliant with the communication standard of the wide area wireless network N1. In addition, when the data transmitted from the terminal side is received via the wide area wireless network N1, the received data is transmitted to the host computer 11.

  The wireless master device 21 is connected to the center side via the wide-area wireless network N1 and forms a mesh-type narrow-area wireless network N2 with the plurality of wireless slave devices 22, 22,. The wireless master device 21 performs wireless communication with the host computer 11 on the center side via the wide area wireless network N1 and wireless communication with the wireless slave devices 22, 22,..., 22 via the narrow area wireless network N2. It is configured.

  When the wireless slave device 22 acquires the meter reading value from the meter 23 connected to the wireless slave device 22, the wireless slave device 22 transmits data indicating the meter reading value to the wireless master device 21 via the narrow area wireless network N <b> 2. At this time, the wireless slave device 22 directly transmits data to the wireless master device 21 or transmits data to the wireless master device 21 through one or more other wireless slave devices 22, 22,. To do. When the wireless master device 21 receives data transmitted from the wireless slave device 22 or when an event to be notified to the host computer 11 occurs in the own device, the wireless master device 21 communicates with the host computer 11 via the wide area wireless network N1. Perform wireless communication.

  The number issuing radio device 30 is connected to the narrow area wireless network N2, and each of the wireless master device 21 and the wireless slave device 22 is assigned a wireless device number that is a unique identifier in the narrow area wireless network N2. Issue. Each of the wireless master device 21 and each wireless slave device 22 stores a unique wireless device number issued from the number issuing wireless device 30, and is configured to identify and communicate with each device.

  The number issuing radio device 30 may be a dedicated terminal that issues a radio device number to the wireless master device 21 and the wireless slave device 22 in the narrow area wireless network N2, and is one of the wireless slave devices 22. It may function as. In the example of FIG. 1, the number issuing radio device 30 is connected to one wireless slave device 22. However, the number issuing wireless device 30 may be connected to the wireless master device 21, and a plurality of wireless slave devices may be connected. The structure connected to the machine 22,22, ... may be sufficient.

  FIG. 2 is a block diagram showing an internal configuration of the wireless master device 21. The wireless master device 21 includes a control unit 210, a storage unit 211, a wide area wireless communication unit 212, a narrow area wireless communication unit 213, a display unit 214, an operation unit 215, and the like. Each component of the hardware provided in the wireless master device 21 is configured to operate with electric power supplied from the battery 219.

  The control unit 210 includes, for example, a CPU, a ROM, a RAM, and the like, reads a control program stored in advance in the ROM into the RAM, and the CPU executes the control program to control the entire device.

  The storage unit 211 is configured by a non-volatile memory such as an EEPROM (Electronically Erasable Programmable Read Only Memory), for example, setting information regarding the operation of the own device, and the wireless device number of the own device issued from the number issuing wireless device 30 Memorize etc.

  The wide area wireless communication unit 212 performs wireless communication via the wide area wireless network N1 by transmitting or receiving radio waves through the antenna 212a. For example, when the wireless master device 21 acquires the meter reading value of the meter 23 through the wireless slave device 22, the wireless master device 21 transmits data indicating the meter reading value to the host computer 11 on the center side. When the wide-area wireless communication unit 212 acquires data to be transmitted through the control unit 210, the wide-area wireless communication unit 212 transmits the data in a format compliant with the communication standard of the wide-area wireless network N1 by driving the antenna 212a to transmit radio waves. Process.

  In addition, when the radio wave is received by the antenna 212a, the wide area radio communication unit 212 acquires data in a predetermined format by decoding the received radio wave (received radio wave). The received radio wave received by the antenna 212a includes various control commands such as an activation command from the host computer 11, for example. Wide-area wireless communication unit 212 outputs data obtained by decoding received radio waves to control unit 210. When the control unit 210 acquires the data output from the wide area wireless communication unit 212, the control unit 210 performs various controls based on the data.

  The narrow area wireless communication unit 213 communicates with a plurality of wireless slave units 22, 22,..., 22 by a predetermined wireless communication method by transmitting or receiving radio waves through the antenna 213a. As the wireless communication method, for example, a specific low power wireless method is adopted. The narrow area wireless communication unit 213 of the wireless master device 21 intermittently transmits a beacon as a search signal for searching for the wireless slave device 22 having data to be transmitted. In addition, the narrow area wireless communication unit 213 receives the beacon transmitted from the wireless slave unit 22 and transmits the data to the transmission source of the beacon when the own apparatus has data to be transmitted.

  The display unit 214 includes an LED lamp, a liquid crystal display panel, and the like, and displays information to be notified to, for example, a worker who performs installation work based on a control signal output from the control unit 210.

  The operation unit 215 includes various switches such as dip switches and buttons, and accepts various setting operations by an operator or the like. The control unit 210 performs various controls based on the setting content input from the operation unit 215 and stores the setting content in the storage unit 211 as necessary.

  In the present embodiment, the wireless master device 21 has been described as having an NCU function. However, a network control device having an NCU function is prepared as an individual device, and the wireless master device 21 is connected to the network control device. It may be configured to. In this case, the wireless master device 21 may be configured to include a connection interface for connecting the network control device and to communicate with the center side via the network control device connected to the connection interface.

  FIG. 3 is a block diagram showing the internal configuration of the wireless slave unit 22. The wireless slave device 22 includes a control unit 220, a storage unit 221, a narrow area wireless communication unit 222, a connection port 223, a display unit 224, an operation unit 225, and the like. Each part of the hardware included in the wireless slave device 22 is configured to operate with electric power supplied from the battery 229.

  The control unit 220 includes, for example, a CPU, a ROM, a RAM, and the like, reads a control program stored in advance in the ROM into the RAM, and the CPU executes the control program so that the entire device is a wireless communication apparatus according to the present invention. To function as.

  The storage unit 221 is configured by, for example, a non-volatile memory such as an EEPROM, and stores setting information related to the operation of the own device, the wireless device number of the own device issued from the number issuing wireless device 30, and the like.

  The narrow area wireless communication unit 222 communicates with the wireless master device 21 and other wireless slave devices 22 by a predetermined wireless communication method by transmitting or receiving radio waves through the antenna 222a. As the wireless communication method, for example, a specific low power wireless method is adopted. The narrow area wireless communication unit 222 of the wireless slave device 22 intermittently transmits a beacon as a search signal for searching for the wireless master device 21 or other wireless slave device 22 having data to be transmitted. In addition, the narrow-area wireless communication unit 222 receives a beacon transmitted from the wireless master device 21 or another wireless slave device 22, and when the own device has data to be transmitted, Send to the sender.

  The connection port 223 includes an interface for connecting a meter 23 and the like for measuring the usage amount of gas, water and the like. When the connection port 223 acquires a meter reading value from the connected meter 23, the connection port 223 sends data indicating the meter reading value to the control unit 220.

  The display unit 224 includes an LED lamp, a liquid crystal display panel, and the like, and displays information to be notified to, for example, a worker who performs installation work based on a control signal output from the control unit 220.

  The operation unit 225 includes various switches and buttons such as a dip switch, and accepts various setting operations by an operator or the like. The control unit 220 performs various controls based on the setting content input from the operation unit 225 and stores the setting content in the storage unit 221 as necessary.

  FIG. 4 is a block diagram showing the internal configuration of the number issuing radio 30. The number issuing radio device 30 includes a control unit 300, a storage unit 301, a narrow area wireless communication unit 302, a connection port 303, a display unit 304, an operation unit 305, and the like. Each hardware unit included in the number issuing radio 30 is configured to operate with electric power supplied from the battery 309.

  The control unit 300 includes, for example, a CPU, a ROM, a RAM, and the like. The CPU causes the entire device to function as the identifier issuing device according to the present invention by reading the control program stored in the ROM in advance into the RAM and executing it.

  The storage unit 301 is configured by a non-volatile memory such as an EEPROM, for example, and has a number issue table that stores the issued wireless device number and information indicating the issue destination in association with each other.

  The narrow-area wireless communication unit 302 communicates with the wireless slave device 22 by a predetermined wireless communication method by transmitting or receiving radio waves through the antenna 302a. As the wireless communication method, for example, a specific low power wireless method is adopted.

  The connection port 303 includes an interface for connecting the meter 23 and the like. When the number issuing wireless device 30 functions as one of the wireless slave devices 22, the meter 23 is connected to the connection port 303. When the meter 23 is connected, the connection port 303 acquires the meter reading value output from the meter 23 and sends data indicating the acquired meter reading value to the control unit 300.

  The display unit 304 includes an LED lamp, a liquid crystal display panel, and the like, and displays information to be notified to, for example, a worker who performs installation work based on a control signal output from the control unit 300. The operation unit 305 includes various switches such as dip switches and buttons, and accepts various setting operations by an operator or the like.

  FIG. 5 is a conceptual diagram showing an example of a number issuing table provided in the number issuing radio 30. The wireless device number is a unique number in the narrow area wireless network N2 assigned to each device installed in the narrow area wireless network N2. For example, 1 to N (N is connectable to the narrow area wireless network N2) Represented by an integer value). Further, the information indicating the issue destination is information unique to each device (hereinafter referred to as a wireless device ID) such as a manufacturing number and a serial number of the wireless master device 21 or the wireless slave device 22, and is, for example, a character string composed of alphanumeric characters. expressed.

  When the number issuing radio 30 receives a request from the radio slave unit 22 (hereinafter referred to as a newly installed terminal) newly connected to the narrow area wireless network N2, the radio number to be issued to the newly installed terminal And an issuance response including the determined radio number is returned. For example, the number issuing radio 30 newly installs the smallest radio number excluding the radio number already registered in the number issuing table among the radio numbers to be issued (for example, numbers 1 to N). It can be determined as a radio number to be assigned to the terminal.

  When the number issuing wireless device 30 issues a wireless device number to the newly installed terminal, the issued wireless device number is associated with the wireless device ID of the issue destination and stored in the number issuing table. In addition, when the number issuing wireless device 30 detects that the wireless slave device 22 to which the wireless device number is assigned is removed and the connection to the narrow-area wireless network N2 is released, the wireless device of the wireless slave device 22 The ID is specified, and the wireless device ID of the specified wireless slave device 22 and the wireless device number stored in association with the wireless device ID are deleted from the number issuing table.

  As described above, the number issuing radio unit 30 issues the number issuing unit when the wireless handset 22 is newly connected to the narrow area wireless network N2 and when the wireless handset 22 is removed from the narrow area wireless network N2. The table is updated appropriately.

Hereinafter, a number issuing procedure by the number issuing radio 30 will be described.
FIG. 6 is a flowchart showing the procedure of number issuing processing in the first embodiment. The newly installed terminal control unit 220 determines whether or not a predetermined operation has been accepted in order to shift to the number issuing mode (step S101). When the predetermined operation is not received (S101: NO), the control unit 220 stands by until the predetermined operation is received.

  When it is determined that the predetermined operation has been accepted (S101: YES), the newly installed terminal directly or one or a plurality of existing wireless slave units 22 in order to request the issuance of the wireless unit number addressed to the own unit. The number issuance request is transmitted to the number issuance radio 30 via (step S102).

  The control unit 300 of the number issuing radio 30 determines whether or not a number issuing request has been received through the narrow area wireless communication unit 302 (step S103). When it is determined that the number issue request has not been received (S103: NO), the control unit 300 waits until the number issue request is received.

  When it is determined that the number issue request has been received (S103: YES), the control unit 300 refers to the number issue table in the storage unit 301 and determines the radio number to be assigned to the newly installed terminal as the request source. (Step S104). For example, the control unit 300 determines, as the radio number to be assigned to the requesting newly installed terminal, the smallest radio number excluding the radio number stored in the number issue table among the radio numbers to be issued. To do.

  Next, the control unit 300 generates an issuance response including the wireless device number determined in step S104, and transmits the generated issuance response directly or via the existing one or more wireless slave devices 22. It transmits to a newly installed terminal (step S105).

  Next, the control unit 300 determines whether or not the issued wireless device number is a wireless device number that has been issued to another wireless slave device 22 in the past (step S106). For example, when the existing wireless slave device 22 is removed from the narrow area wireless network N2 and the wireless device ID and the wireless device number of the wireless slave device 22 are deleted from the number issuing table, the control unit 300 is deleted. The wireless device number is stored in the storage unit 301 as a wireless device number that has been issued in the past. The control unit 300 is a wireless device number that has been issued to other wireless slave devices 22 in the past by determining whether or not the same wireless device number as this wireless device number has been assigned to the newly installed terminal. It can be determined whether or not.

  When it is determined that the issued wireless device number is not a wireless device number that has been issued to another wireless slave device 22 in the past (S106: NO), the control unit 300 ends the processing according to this flowchart.

  When it is determined that the issued wireless device number is a wireless device number that has been issued to another wireless slave device 22 in the past (S106: YES), the control unit 300 notifies the wireless master device 21 to that effect. (Step S107). At this time, the number issuing wireless device 30 may be configured to notify the wireless master device 21 of information such as the wireless device number issued to the newly installed terminal and the wireless device ID of the newly installed terminal.

  On the other hand, the control unit 220 of the newly installed terminal determines whether or not an issue response transmitted from the number issuing radio 30 has been received after transmitting the number issuing request in step S102 (step S108). When it is determined that the issue response has not been received (S108: NO), the control unit 220 waits until the issue response is received from the number issuing radio 30.

  If it is determined that the issue response has been received (S108: YES), the control unit 220 extracts the wireless device number addressed to the own device included in the received issue response, and stores the extracted wireless device number in the storage unit 221. (Step S109).

  As described above, in the first embodiment, when a new wireless slave device 22 is connected in the narrow-area wireless network N2, the same wireless device number that has been assigned to another wireless slave device 22 in the past. When the wireless device number is issued, information to that effect can be notified to the wireless base device 21, so that it is possible to prevent a communication error, information leakage, etc. due to the repeated use of the wireless device number.

(Embodiment 2)
In the second embodiment, a configuration for stopping communication with the wireless slave device 22 assigned with the duplicate wireless device number will be described.
The overall configuration of the wireless telemeter system, the configuration of each device, and the like are the same as those in the first embodiment, and thus description thereof is omitted.

  FIG. 7 is a flowchart for explaining a procedure of processing executed by the wireless master device 21 according to the second embodiment. The control unit 210 of the wireless master device 21 has issued the same wireless device number to the newly installed terminal as the wireless device number that has been issued to the other wireless slave devices 22 through the narrow-range wireless communication unit 213 in the past. It is determined whether a notification has been received from the number issuing radio 30 (step S201). When the notification has not been received (S201: NO), the control unit 210 ends the process according to this flowchart.

  When determining that the notification has been received (S201: YES), the control unit 210 stops communication with the newly installed terminal (step S202). When the wireless master device 21 receives data addressed to a newly installed terminal from outside the narrow area wireless network N2, or when receiving data to be transmitted to the outside of the narrow area wireless network N2 using the newly installed terminal as a transmission source, By stopping communication, communication errors and information leakage can be prevented.

(Embodiment 3)
In the third embodiment, when communication with a newly connected wireless slave device 22 is stopped, a configuration is described in which the communication stop is canceled at the timing when the device ID of the wireless slave device 22 is notified to the host side. I do.
The overall configuration of the wireless telemeter system, the configuration of each device, and the like are the same as those in the first embodiment, and thus description thereof is omitted.

  At the timing when the newly installed terminal calls to the center, the radio ID and radio number of the newly installed terminal are notified, and the operation as a regular communication device is started in the narrow area wireless network N2. For this reason, the wireless master device 21 may be configured to cancel the communication stop for the newly installed terminal when receiving a call from the newly installed terminal to the center side.

  FIG. 8 is a flowchart for explaining a procedure of processing executed by the wireless master device 21 according to the third embodiment. The control unit 210 of the wireless master device 21 determines whether a call from the newly installed terminal to the center side is received through the narrow area wireless communication unit 213 (step S301). When a call is not received (S301: NO), the control unit 210 waits until a call from the newly installed terminal to the center side is received.

  When the call is received (S301: YES), the control unit 210 transmits the received call to the center side through the wide area wireless communication unit 212 (step S302).

  Next, the control unit 210 determines whether or not a communication stop is performed for the transmission source of the call (step S303). When the communication stop is performed (S303: YES), the control unit 210 stops the communication. Is canceled (step S304). When communication stop is not implemented (S303: NO), the control part 210 complete | finishes the process by this flowchart.

  As described above, in the third embodiment, the communication suspension can be canceled when it can be determined that the terminal is a legitimate terminal in the narrow area wireless network N2.

(Embodiment 4)
In the fourth embodiment, a configuration for communicating with each device connected to another narrow area wireless network via a gateway radio will be described.

  FIG. 9 is a block diagram showing the overall configuration of the radio telemeter system according to the fourth embodiment. The radio telemeter system according to the present embodiment includes a BB-GW radio (backbone gateway radio) 40, a plurality of BB-GW radios (backbone gateway radios) 40, in addition to the above-described radio master unit 21, radio slave unit 22, meter 23, and number issuing radio unit 30. BB wireless devices (backbone wireless devices) 41, 41,..., GW wireless devices (gateway wireless devices) 42 form a narrow area wireless network NA. The wireless master device 21 is connected to the center side devices (the host computer 11 and the center side network control device 12) via the wide area wireless network N1.

  The BB-GW wireless device 40 has a function of relaying communication between the wireless master device 21 and the BB wireless device 41. The GW wireless device 42 has a function of relaying communication between the wireless slave device 22 and the BB wireless device 41.

  The BB radio 41 in the narrow area network NA is installed so as to be able to communicate with BB radios (not shown) in other narrow area networks NB having the same network configuration as the narrow area network NA. When the BB radio 41 in the narrow area radio network NA receives data transmitted from a device in the narrow area radio network NB, the radio base station 21 or the BB radio 41 via the BB-GW radio 40 or the GW radio 42 Transfer to the wireless slave unit 22. At this time, the BB-GW wireless device 40 and the GW wireless device 42 convert data received from the outside into data that can be interpreted by the wireless master device 21 or the wireless slave device 22, and the wireless master device 21 or the wireless slave device 22. You may make it transfer data to.

  Further, when the BB radio 41 in the narrow area wireless network NA receives data to be transmitted to a device in the narrow area wireless network NB, the BB radio 41 can transfer the data through the BB radio in the narrow area wireless network NB. it can. Therefore, when a new wireless slave unit 22 is connected in the narrow area wireless network NA in the same procedure as in the first embodiment, the wireless unit number that has been assigned to another wireless slave unit 22 in the past When the same wireless device number is issued, information to that effect can be notified to a device (for example, the wireless master device 21) in the narrow area wireless network NB.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  Regarding the above embodiment, the following additional notes are disclosed.

  The wireless communication system of the present application is formed by a wireless master device (21) and a plurality of wireless slave devices (22) each having a unique identifier, and the wireless master device (21) and the plurality of wireless slave devices (22). Is issued in response to a request from the wireless master device (21) or each wireless slave device (22), and the issued identification number and the issuing wireless master device ( 21) or a wireless parent identified by an identification number issued by the number issuing wireless device (30), including a number issuing wireless device (30) that is associated with the identifier of the wireless slave device (22) and stored in the number issuing table. In the wireless communication system for performing wireless communication between the wireless device (21) and the plurality of wireless slave devices (22), the number issuing wireless device (30) is the wireless slave device (22) removed from the wireless network (N2) Identifier and associated with the identifier In response to a request from the specifying means (300) for specifying the wireless device number stored in the number issuing table and the wireless slave device (22) newly connected to the wireless network (N2), When the identification number identical to the identification number identified by the identification means (300) is issued, the notification means (302) for notifying the wireless master unit (21) of the fact is provided.

  In this application, when a new wireless slave device is connected to the wireless network, if the same wireless device number that has been assigned to another wireless slave device is issued in the past, Since the information can be notified to the wireless master device, communication errors, information leaks, etc. due to reuse of the wireless device number can be prevented.

  In the wireless communication system of the present application, the wireless master device (21) has received a notification from the number issuing wireless device (30) that it has issued the same identification number as the identification number specified by the specifying means (300). In this case, the wireless communication device includes a unit (210) for stopping communication with the wireless slave unit (22) identified by the identification number.

  In the present application, when the wireless master unit receives data addressed to the newly installed terminal from the outside of the wireless network, or when receiving data to be transmitted to the outside using the newly installed terminal as a transmission source, by stopping communication, Communication errors and information leakage can be prevented.

  The wireless communication system of the present application further includes a communication device (11) that is communicably connected to the wireless master unit (21) via a communication network (N1) different from the wireless network (N2). The device (21) permits only predetermined communication from the wireless slave device (22) to the communication device (11). When the predetermined communication is performed, the wireless slave device (22) ) Is canceled.

  In the present application, communication can be resumed when it can be determined that the terminal is a legitimate terminal in the wireless network.

  The number issuing radio of the present application is connected to a radio network (N2) formed by a radio master unit (21) and a plurality of radio slave units (22) each having a unique identifier, and the radio master unit (21) Alternatively, in response to a request from each wireless slave unit (22), an identification number for identifying each is issued within the wireless network (N2), and the issued identification number and the wireless master unit (21) or wireless slave unit ( In the number issuing wireless device (30) that associates the identifier of 22) with the number issuing table and stores it in the number issuing table, the identifier of the wireless slave device (22) removed from the wireless network (N2), and the identifier associated with the identifier In accordance with a request from the wireless unit (22) newly connected to the wireless network (N2), the specifying unit (300) for specifying the wireless device number stored in the number issuing table, the specifying device ( 300) When you issue the same identification numbers, characterized in that it comprises a notifying means and (302) that notifies the wireless base station to (21).

  In this application, when a new wireless slave device is connected to the wireless network, if the same wireless device number that has been assigned to another wireless slave device is issued in the past, Since the information can be notified to the wireless master device, communication errors, information leaks, etc. due to reuse of the wireless device number can be prevented.

11 Host computer 12 Center side network control device 21 Wireless master unit 22 Wireless slave unit 23 Meter 30 Number issuing radio unit 210, 220, 300 Control unit 211, 221, 301 Storage unit 212 Wide area wireless communication unit 213, 222, 302 Narrow area Wireless communication unit 214, 224, 304 Display unit 215, 225, 305 Operation unit 219, 229, 309 Battery 223, 303 Connection port

Claims (4)

A wireless master device and a plurality of wireless slave devices each having a unique identifier, and an identification number for identifying each of them in a wireless network formed by the wireless master device and the plurality of wireless slave devices, Issued in response to a request from each wireless handset, including a number issuing wireless device that stores the issued identification number in association with the issued wireless base unit or identifier of the wireless handset in a number issuing table. In a wireless communication system that performs wireless communication between a wireless master device identified by an identification number issued by a wireless device and a plurality of wireless slave devices,
The number issuing radio is
An identification unit for identifying an identifier of the wireless slave device removed from the wireless network, and a wireless device number stored in the number issuing table in association with the identifier;
In response to a request from a wireless slave unit newly connected to the wireless network, when issuing the same identification number as the identification number specified by the specifying unit, a notification unit for notifying the wireless base unit to that effect; A wireless communication system comprising: The wireless master unit is
And a means for stopping communication with the wireless slave unit identified by the identification number when receiving a notification from the number issuing radio unit that the identification unit has issued the same identification number as the identification number identified by the identifying unit. The wireless communication system according to claim 1. A communication device that is communicably connected to the wireless master device via a communication network different from the wireless network;
The wireless master unit is
Only predetermined communication from the wireless slave unit to the communication device is permitted,
The wireless communication system according to claim 2, wherein when the predetermined communication is performed, the communication stop with the wireless slave device is canceled. Each is connected to a wireless network formed by a wireless master device having a unique identifier and a plurality of wireless slave devices, and each is identified in the wireless network in response to a request from the wireless master device or each wireless slave device In the number issuing wireless device that issues the identification number and associates the issued identification number with the identifier of the wireless master device or wireless slave device to be issued and stores it in the number issuing table,
An identification unit for identifying an identifier of the wireless slave device removed from the wireless network, and a wireless device number stored in the number issuing table in association with the identifier;
In response to a request from a wireless slave unit newly connected to the wireless network, when issuing the same identification number as the identification number specified by the specifying unit, a notification unit for notifying the wireless base unit to that effect; A number issuing radio device comprising:

Images