JP2017045329A - Wireless telemeter system and communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio telemeter system and a communication device that can avoid communication between radio apparatuses belonging to different groups even if a radio network is constructed by multiple groups of radio apparatuses in a mixed state.SOLUTION: Each of first apparatuses comprises a transmission unit that intermittently transmits an ID notification signal including an apparatus ID, i.e. the identifier of the apparatus itself and a group ID, i.e. the identifier of a group to which the apparatus belongs among a plurality of groups into which the first devices are classified according to their attribute. A second radio apparatus comprises: a storage unit that associates and stores at least one of the radio apparatus ID of each first radio apparatus and a meter ID, i.e. the identifier of a meter connected with the first radio apparatus with the group ID of the group the first radio apparatus belongs to; and a determination unit that, if a signal destined to a first radio apparatus or meter from the communication device is received, refers to the association of each ID stored in the storage unit and determines a transfer destination group that the received signal should be transferred to.SELECTED DRAWING: Figure 8

Description

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

  A wireless telemeter system developed for meter reading of gas, water, electricity, etc. is known (see, for example, Patent Document 1). The wireless telemeter system includes a host computer, a center network control device, and the like as a configuration on the center side, and includes a wireless master device, a wireless slave device, and the like as a configuration on the terminal side. The center-side host computer and terminal-side wireless master unit are communicably connected via a wide-area communication network such as a public telephone network, PHS (Personal Handyphone System) network, or FOMA (Freedom Of Mobile multimedia Access) network. Is done. The terminal-side wireless master device and each wireless slave device are communicably connected via a narrow-area wireless network such as a specific low-power wireless system.

  Each wireless handset is connected to a meter that measures the amount of gas, water, electricity, and other supplies supplied to each consumer. Each wireless handset has a measurement result ( When the meter reading value) is acquired, data including the acquired meter reading value is transmitted to the wireless master unit through the narrow area wireless network. Further, the wireless master device transmits the meter reading data received from each wireless slave device to the host computer on the center side through the wide area communication network.

  A mesh type network is known as one of the terminal side network configurations. In a mesh type network, for example, when the own device can receive data transmitted from the outside, the beacon is periodically used to search for other devices (wireless master device or wireless slave device) having data to be transmitted. To send. When the wireless master device or the wireless slave device having data to be transmitted receives the beacon, the wireless master device or the wireless slave device transmits data to the transmission source of the beacon.

JP 2004-341648 A

  In a wireless telemeter system, when the wireless networks managed by multiple operators are geographically overlapped or laid in close proximity, the center and the wireless master unit are shared by multiple operators to invest and maintain Can be made more efficient.

  However, in order to share a wireless master unit with a plurality of business operators, when a narrow-area wireless network is formed by mixing wireless slave devices of a plurality of business operators that can communicate with the wireless master device, the wireless service of one business operator is used. There is a possibility that another operator's wireless slave device may exist on the communication path from the slave device to the wireless master device, and there is a possibility that relay will be performed between wireless slave devices of different operators. have.

  In addition, for wireless slave devices that are frequently used as a relay for communication by other wireless slave devices, battery consumption becomes fast, and injustice may occur between operators in terms of power consumption, maintenance burden, etc. .

  Furthermore, in a narrow area wireless network in which wireless handsets of a plurality of business operators are mixed, it is not possible to clarify which business is responsible for the management responsibility, operational responsibility, etc. of the narrow area wireless network.

  The present invention has been made in view of such circumstances, and in order to share a wireless master device (second wireless device) among a plurality of groups, wireless slave devices (first wireless devices) of each group are mixed. Accordingly, an object of the present invention is to provide a wireless telemeter system and a communication device that can avoid communication between wireless slave units in different groups even when a wireless network is formed.

  The wireless telemeter system of the present application is capable of wireless communication with a plurality of first wireless devices connected to a meter and the first wireless device via a wireless network, and connected to a communication network different from the wireless network. In a wireless telemeter system including a second wireless device capable of communicating with a communication device, each first wireless device can receive a signal transmitted from the second wireless device or another first wireless device. A determination unit that determines whether or not the wireless communication device is capable of receiving, the wireless device ID that is an identifier of the wireless device, and a plurality of groups that classify the first wireless devices according to attributes A transmission unit that intermittently transmits an ID notification signal including a group ID that is an identifier of a group to which the second radio belongs, and the second radio transmits to the radio ID of each first radio and the first radio Memories that are identifiers of connected meters A storage unit that associates and stores at least one of the data IDs and a group ID of the group to which the first radio belongs, and receives a signal from the communication device destined for the first radio or meter via the communication network In this case, referring to the association of each ID stored in the storage unit, a determination unit for determining a transfer destination group to which the received signal is to be transferred, and reception for receiving the ID notification signal transmitted from the transmission unit And a communication connection that establishes a communication connection with the first wireless device that is the transmission source of the ID notification signal when the group ID included in the received ID notification signal corresponds to the group ID of the group determined by the determination unit And a transfer unit that transfers a signal from the communication device to the first wireless device that has established a communication connection.

  In the wireless telemeter system of the present application, when the second wireless device determines that the signal transmitted from each first wireless device can be received, and the determination unit determines whether the signal can be received, A transmission unit that intermittently transmits an ID notification signal including a wireless device ID that is an identifier of the two wireless devices and any one group ID by sequentially changing the group ID, and each first wireless device A receiving unit that receives an ID notification signal transmitted from the second radio or another first radio, and an ID that has data to be transmitted to the communication device and is received from the second radio When the group ID included in the notification signal corresponds to the group ID of the own device, the communication device includes a communication connection unit that establishes a communication connection with the second wireless device, and transmits the data to the second wireless device that has established the communication connection. Transmitting a signal containing To.

  In the wireless telemeter system of the present application, the second wireless device has a unique group ID assigned to the second wireless device, and determines whether or not a signal transmitted from each first wireless device can be received. A determination unit that determines, and a transmission unit that intermittently transmits an ID notification signal including the wireless device ID that is the identifier of the second wireless device and the unique group ID when determining that reception is possible Each first radio includes a storage unit that stores the unique group ID, a reception unit that receives an ID notification signal transmitted from the second radio or another first radio, and the communication device. A communication connection unit that establishes a communication connection with the second radio when the group ID included in the received ID notification signal corresponds to the unique group ID. The second having established a communication connection And transmitting a signal including the data to line unit.

  In the radio telemeter system according to the present application, the second radio includes a plurality of bits as an identifier of a group to which the second radio belongs, and all bits in a specific range of the plurality of bits are set to 1. A determination unit that has a group ID and determines whether or not a signal transmitted from each first wireless device is receivable, and a wireless device that is an identifier of the second wireless device when it is determined that reception is possible A transmitter that intermittently transmits an ID notification signal including a device ID and the group ID, and each first wireless device has the same number of bits as the group ID of the second wireless device as an identifier of the own group. An ID notification signal having a group ID in which any one of bits within the same range as the specific range is set to 1, and transmitted from the second radio or another first radio Receive And the logical product of each bit of the group ID included in the received ID notification signal and each bit of the group ID of the own group matches the group ID of the own group A communication connection unit that establishes a communication connection with a transmission source of the ID notification signal, and transmits a signal including the data to the transmission source of the ID notification signal that has established a communication connection.

  In the wireless telemeter system of the present application, the communication connection unit of the first wireless device and the second wireless device has data to be transmitted, and each bit of the group ID included in the received ID notification signal is determined in advance. If the logical product of each bit of the mask value is equal to the logical product of each bit of the group ID of the own group and each bit of the mask value, a communication connection is established with the transmission source of the ID notification signal. It is characterized by.

  The communication device of the present application is capable of wireless communication via a wireless network with a plurality of wireless devices to which a meter is connected, and communication capable of communicating with an external device connected to a communication network different from the wireless network. In the apparatus, at least one of a wireless device ID that is an identifier of each wireless device and a meter ID that is an identifier of a meter connected to each wireless device, and a storage unit that associates and stores a group ID of a group to which each wireless device belongs When a signal transmitted from the external device is received with one radio device or meter as a destination, a group of transfer destinations to which the received signal should be transferred with reference to the association of each ID stored in the storage unit The discriminating unit discriminates the discriminating unit, the receiving unit receiving the ID notification signal including the radio ID and the group ID, and the group ID included in the received ID notification signal. In the case of a loop group ID, a communication connection unit that establishes a communication connection with the transmission source of the ID notification signal, and a transfer unit that transfers a signal from the external device to the transmission source that has established the communication connection. It is characterized by providing.

  According to the present application, in order to share a wireless master device (second wireless device) among a plurality of groups, even when a wireless network is formed by mixing wireless slave devices (first wireless devices) of each group. Communication between wireless slaves in different groups can be avoided. As a result, it is possible to eliminate unfairness among operators in terms of power consumption, maintenance burden, etc., and to clarify the responsibilities of the management responsibility, operational responsibility, etc. of the narrow area wireless network.

It is a block diagram which shows the whole structure of the radio telemeter system which concerns on this Embodiment. It is a block diagram which shows the internal structure of NCU. It is a block diagram which shows the internal structure of a gateway radio. It is a block diagram which shows the internal structure of a radio | wireless machine. It is explanatory drawing explaining operation | movement of a gateway radio | wireless machine and a radio | wireless machine. It is an ID management table stored in the gateway radio. It is a schematic diagram which shows an example of the flame | frame structure of RNO. It is a flowchart explaining the procedure of the process which a gateway radio | wireless machine performs. FIG. 10 is an explanatory diagram for explaining an operation of a gateway radio according to the second embodiment. FIG. 10 is an explanatory diagram for explaining an operation of a gateway radio according to the third embodiment. FIG. 10 is an explanatory diagram for explaining an operation of a gateway radio according to the 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 present embodiment. The radio telemeter system according to the present embodiment includes, as a terminal-side configuration, NCU 20 (NCU: Network Control Unit), gateway radio 21, for example, radios 22A to 22C and meters 23A managed by operators A to C, respectively. With ~ 23C. The meters 23A to 23C are measuring devices that are installed for each consumer such as a private house, a company, various facilities, and the like, measure the amount of gas, water, electricity, and the like, and output a measurement result (meter reading value). In the wireless telemeter system, various data output from the terminal side such as data indicating meter reading values of the meters 23A to 23C and data indicating the operating states of the wireless devices 22A to 22C are transmitted to the center 10 using wireless communication. Various data including control commands for controlling the operations of the radio devices 22A to 22C and the meters 23A to 23C are transmitted from the center 10 to the terminal side.

  The center 10 is a server device for communicating with a terminal side via a wide area wireless network N such as a PHS network or a FOMA network and storing data transmitted from the terminal side.

  The NCU 20 is connected to the wide area wireless network N and performs wireless communication with the center 10 via the wide area wireless network N. Note that communication between the NCU 20 and the center 10 is not limited to wireless communication, but may be wired communication. In this case, the NCU 20 and the center 10 are connected by a wired communication network.

  The gateway radio 21 and the NCU are connected via a bus line such as a U bus. The gateway radio 21 is configured to be able to communicate with the center 10 through the NCU 20 connected via a bus line. The gateway radio 21 includes a narrow area wireless network NA constructed by radio apparatuses 22A, 22A,..., 22A, a narrow area wireless network NB constructed by radio apparatuses 22B, 22B,. , 22C,..., 22C is configured to be able to communicate with each of the radio devices 22A to 22C by participating in a narrow area network NC constructed by the network. Note that the narrow-area wireless networks NA to NC are distinguished by network numbers that identify them.

  For example, when each wireless device 22A belonging to the narrow area wireless network NA acquires a meter reading value from a meter 23A connected to each of the wireless devices 22A, data indicating the meter reading value is transmitted to the gateway wireless device 21 via the narrow area wireless network NA. Send. The same applies to each wireless device 22B belonging to the narrow area wireless network NB and each wireless device 22C belonging to the narrow area wireless network NC. The gateway radio 21 receives data transmitted from the radios 22A to 22C through the narrow-area radio networks NA to NC, and when an event to be notified to the center 10 occurs in its own machine, etc. 10 to communicate with the center 10 and transmit desired data to the center 10.

  In the following description, when it is not necessary to distinguish between the radio devices 22A to 22C belonging to the narrow-area radio networks NA to NC, the radio devices 22 are also described. Moreover, when it is not necessary to distinguish and explain the meters 23A to 23C connected to the wireless devices 22A to 22C, they are also referred to as meters 23.

  FIG. 2 is a block diagram showing the internal configuration of the NCU 20. The NCU 20 includes a control unit 200, a storage unit 201, a wide area wireless communication unit 202, a connection unit 203, a display unit 204, an operation unit 205, and the like. Each part of the hardware included in the NCU 20 is configured to operate with electric power supplied from a built-in battery or an external power source (not shown).

  The control unit 200 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and the like. The CPU in the control unit 200 controls the operation of each hardware unit described above by executing a control program stored in advance in the ROM. Further, the control unit 200 may have functions such as a timer that measures an elapsed time from when a measurement start instruction is given to when a measurement end instruction is given, and a counter that counts the number.

  The storage unit 201 is configured by a non-volatile memory such as an EEPROM (Electronically Erasable Programmable Read Only Memory), for example, and information such as setting information related to the operation of the NCU 20 and the address of the gateway radio 21 connected to the connection unit 203. Memorize etc.

  The wide area wireless communication unit 202 communicates with the center 10 by transmitting or receiving radio waves through the antenna 202a. For example, when the NCU 20 receives the data of the meter reading values transmitted from the meters 23A to 23C through the radio devices 22A to 22C and the gateway radio device 21, the NCU 20 drives the antenna 202a to transmit a radio wave, thereby transmitting the wide area wireless network N. The wide area wireless communication unit 202 is caused to execute a process of transmitting data in a format compliant with the communication standard.

  In addition, when the radio wave is received by the antenna 202a, the wide area radio communication unit 202 detects the radio wave intensity of the radio wave and decodes the received radio wave to acquire data in a predetermined format. The received radio wave received by the antenna 202a includes various control commands such as a start command transmitted from the center 10, for example. Wide area wireless communication unit 202 outputs data obtained by decoding received radio waves to control unit 200. When acquiring data output from the wide area wireless communication unit 202, the control unit 200 performs various controls based on the data.

  The connection unit 203 includes an interface for connecting various devices via a bus line such as a U bus. In the present embodiment, it is assumed that a gateway radio 21 described later is connected to the connection unit 203.

  The display unit 204 includes an LED lamp (LED: Light Emitting Diode), a liquid crystal display panel, and the like, and a worker who performs installation work and maintenance work of the NCU 20 based on control signals output from the control unit 200. Displays information to be notified.

  The operation unit 205 includes various switches and buttons such as a dip switch, and accepts various setting operations by an operator or the like. The control unit 200 performs various controls based on the setting content input from the operation unit 205 and stores the setting content in the storage unit 201 as necessary.

  FIG. 3 is a block diagram showing the internal configuration of the gateway radio 21. The gateway radio 21 includes a control unit 210, a storage unit 211, a connection unit 212, a narrow area wireless communication unit 213, a display unit 214, an operation unit 215, and the like. Each part of the hardware included in the gateway radio 21 is configured to operate with electric power supplied from a built-in battery or an external power source (not shown).

  The control unit 210 includes, for example, a CPU and a ROM. The CPU in the control unit 210 executes the control program stored in advance in the ROM, thereby causing the entire device to function as the second wireless device according to the present invention. In addition, the control unit 210 may have functions such as a timer that measures an elapsed time from when a measurement start instruction is given to when a measurement end instruction is given, and a counter that counts the number.

  The storage unit 211 is configured by, for example, a non-volatile memory such as an EEPROM, and stores setting information related to the operation of the gateway wireless device 21 and a wireless device number assigned to the gateway wireless device 21, and an ID management table described later. And a hop number table. In the present embodiment, a hop number table that associates and stores each wireless device 22A belonging to the narrow-area wireless network NA and the number of hops reaching the wireless device 22A, each wireless device 22B belonging to the narrow-area wireless network NB, and the corresponding wireless device A hop number table for storing the number of hops reaching the device 22B in association with each other, and a hop number table for storing each of the radio devices 22C belonging to the narrow-area wireless network NC in association with the number of hops reaching the radio device 22C And

  The connection unit 212 includes an interface for connecting the gateway radio 21 to the connection unit 203 on the NCU 20 side. The gateway radio 21 communicates with the NCU 20 connected via the bus line through the connection unit 212.

  The narrow-area wireless communication unit 213 performs wireless communication with the wireless devices 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 communication method compliant with the U bus air standard is adopted. When the local wireless communication unit 213 of the gateway wireless device 21 can receive data transmitted from the wireless device 22, the local wireless communication unit 213 receives the ID of the local wireless device and the narrow-area wireless network (for example, a narrow wireless network) to which the local wireless device belongs. ID notification signal (RNO) including the network number of the regional wireless network NA) is intermittently transmitted. Also, the narrow-area wireless communication unit 213 receives the RNO transmitted from the wireless device 22 and transmits the data to the RNO transmission source when the own device has data to be transmitted.

  The display unit 214 includes an LED lamp, a liquid crystal display panel, and the like, and should notify a worker or the like who performs installation work and maintenance work of the gateway radio 21 based on a control signal output from the control unit 210. Display information.

  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 configuration in which the NCU 20 and the gateway radio 21 are separate has been described, but a configuration in which a radio in which the NCU 20 and the gateway radio 21 are integrated may be used.

  FIG. 4 is a block diagram showing an internal configuration of the wireless device 22. The wireless 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 hardware unit included in the wireless device 22 is configured to operate with electric power supplied from the battery 229.

  The control unit 220 includes, for example, a CPU and a ROM. The CPU in the control unit 220 executes the control program stored in advance in the ROM, thereby causing the entire device to function as the first wireless device according to the present invention. Further, the control unit 220 may have functions such as a timer that measures an elapsed time from when a measurement start instruction is given to when a measurement end instruction is given, and a counter that counts the number.

  The storage unit 221 is configured by a nonvolatile memory such as an EEPROM, for example, and stores setting information regarding various operations, a radio number assigned to the own device, a meter ID of the meter 23 connected to the connection port 223, and the like. To do. In addition, the storage unit 221 stores the radio number assigned to each radio 22 in the narrow area wireless network (for example, the narrow area radio network NA) to which the own apparatus belongs and the number of hops to reach the radio 22. A hop number table for storing the information in association is provided.

  The narrow area wireless communication unit 222 transmits or receives radio waves through the antenna 222a, thereby performing wireless communication with the gateway wireless device 21 and the other wireless devices 22, 22,. Do. As the wireless communication method, for example, a communication method compliant with the U bus air standard is adopted. The narrow area wireless communication unit 222 of the wireless device 22 can receive the data transmitted from the gateway wireless device 21 or the other wireless device 22 when the own device can receive the ID of the own device and the narrow space to which the own device belongs. RNO including a network number of a regional wireless network (for example, a narrow-area wireless network NA) is intermittently transmitted. In addition, the narrow-area wireless communication unit 222 receives the RNO transmitted from the gateway wireless device 21 or the other wireless device 22, and when the own device has data to be transmitted, transmits the data to the RNO. Send to the original.

  The connection port 223 connects a meter 23 for measuring the usage amount of gas, water, electricity 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 is information to be notified to a worker who performs installation work and maintenance work of the wireless device 22 based on a control signal output from the control unit 220. Is displayed.

  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.

Hereinafter, operations of the gateway radio 21 and the radio 22 will be described.
FIG. 5 is an explanatory diagram for explaining the operation of the gateway radio 21 and the radio 22, and FIG. 6 is an ID management table stored in the gateway radio 21. FIG. 5 shows a simplified network configuration of the wireless telemeter system. As described above, the gateway radio 21 can communicate with the radios 22A to 22C belonging to the narrow area radio networks NA to NC. When the gateway radio 21 receives a signal transmitted from the center 10 to the radio 22 or the meter 23, the gateway radio 21 is based on an identifier for identifying the destination of the signal (the radio number of the radio 22 or the meter ID of the meter 23). Thus, it is determined to which network number the narrow-area wireless networks NA to NC are to transfer the signal. For this reason, the gateway radio 21 has an ID management table as shown in FIG. The ID management table associates the meter ID, which is the identifier of the meter 23, the wireless device number, which is the identifier of the wireless device 22, and the network number of the narrow-area wireless network NA (or the narrow-area wireless network NB, NC) to which the wireless device 22 belongs. Remember.

  It is assumed that the gateway radio 21 is assigned “0x12345F” in hexadecimal as a network number. Further, it is assumed that a hexadecimal number “0x123451” is assigned as a network number to the narrow area wireless network NA formed by the wireless devices 22A, 22A,. The same applies to the other narrow-area wireless networks NB and NC, and it is assumed that hexadecimal numbers “0x123452” and “0x123454” are assigned, respectively.

  For example, when the meter ID of the meter 23A connected to the wireless device 22A is “AB00155”, the meter ID “AB00155”, the wireless device number “0x...” Of the connected wireless device 22A, and the wireless device 22A The network number “0x123451” of the narrow-area wireless network NA to which it belongs is associated with each other and stored in the ID management table. Similarly, when the meter ID of the meter 23B connected to the wireless device 22B is “CD00254”, the meter ID “CD00254”, the wireless device number “0x...” Of the connected wireless device 22B, and the wireless device 22B When the network number “0x123452” of the narrow-area wireless network NB to which it belongs is associated and stored in the ID management table and the meter ID of the meter 23C connected to the wireless device 22C is “EF00353”, the meter ID “EF00353”, The wireless device number “0x...” Of the connected wireless device 22C and the network number “0x123454” of the narrow area wireless network NC to which the wireless device 22C belongs are associated and stored in the ID management table.

  When the gateway radio 21 receives the signal addressed to “AB00155” transmitted from the center 10 via the NCU 20, the gateway radio 21 refers to the ID management table so that the meter 23A identified by “AB00155” Since it can be seen that the radio is connected to the radio 22A belonging to the network NA, in order to transfer the received signal to the radio 22A in the narrow area radio network NA, it waits for the RNO transmitted from the radio 22A. It becomes a state.

  FIG. 7 is a schematic diagram showing an example of a frame configuration of RNO. When the gateway wireless device 21 and each of the wireless devices 22A to 22C have a signal to be transmitted, the gateway wireless device 21 and the wireless devices 22A to 22C are in a reception waiting state waiting for an RNO transmitted from a destination to be a transmission destination. Further, the gateway radio 21 and the radios 22A to 22C intermittently transmit RNO (ID notification signal) when they are in a state where signals transmitted from other machines can be received.

  The RNO frame includes, for example, a physical header, a sequence number, a destination radio number, a group ID, a source radio number, a link control command, a continuous check code abnormality detection count, and a check code. Here, the group ID is an identifier of a group that classifies each wireless device 22 according to the attribute. In the present embodiment, the network numbers of the narrow-area wireless networks NA to NC to which the wireless devices 22 belong are used as the group ID.

  When the gateway radio 21 receives the RNO transmitted from the radio 22A, the gateway radio 21 transmits a request to the RNO transmission source (radio 22A), and the link between the gateway radio 21 and the radio 22A. Is established. The gateway radio 21 transmits the signal received from the center 10 to the radio 22 that has established the link.

  When the radio device 22A determines that the signal received from the gateway radio device 21 is a signal addressed to the meter 23A connected to the own device, the radio device 22A transfers the signal to the meter 23A connected to the connection port 223. When it is determined that the signal is not addressed to the meter 23A connected to the own device, the wireless device 22A refers to the hop number table stored in the storage unit 221 to thereby determine the wireless device 22A (narrowband wireless) to be the transfer destination. The other wireless device 22A) in the network NA is specified, and a standby state for waiting for the RNO transmitted from the transfer destination wireless device 22A is entered. When the wireless device 22A receives the RNO transmitted from the transfer destination wireless device 22A, the wireless device 22A transmits a request to establish a link with the transfer destination wireless device 22A, and transmits the signal received from the gateway wireless device 21 to the transfer destination. To the wireless device 22A. Thereafter, the signal sent from the center 10 to the meter 23A is connected to the meter 23A by repeating the process of transmitting and receiving signals between the two radio units 22A and 22A in the narrow area network NA as necessary. The meter 23A is reached through the radio 22A.

The same applies to a signal addressed to the meter 23B in the narrow-area wireless network NB and a signal addressed to the meter 23C in the narrow-area wireless network NC transmitted from the center 10, and each of the one or more signals in the narrow-area wireless network NB. The destination meter 23B or 22C is reached via the wireless device 22B or one or more wireless devices 22C in the narrow-area wireless network NC.
The signals transmitted from the radio devices 22A to 22C and the meters 23A to 23C to the center 10 are transmitted via the radio devices 22A to 22C and the gateway radio device 21 in the narrow area wireless networks NA to NC to which the radio devices 22A to 22C belong. It is transmitted to the center 10.

  FIG. 8 is a flowchart for explaining a procedure of processing executed by the gateway radio 21. The control unit 210 of the gateway radio 21 determines whether or not the signal addressed to the meter 23 transmitted from the center 10 has been received through the NCU 20 connected to the connection unit 212 (step S101).

  When it is determined that the signal addressed to the meter 23 has been received (S101: YES), the control unit 210 refers to the ID management table stored in the storage unit 211 and determines the distribution destination of the received signal (step S102). . For example, when a signal destined for the meter 23A is received, the control unit 210 determines that the narrowband wireless network NA is a destination to which the received signal is distributed.

  The control unit 210 determines whether or not the RNO transmitted from the determined wireless device 22 (for example, the wireless device 22A belonging to the narrow-area wireless network NA) is received through the narrow-area wireless communication unit 213 (step). S103). When the RNO has not been received (S103: NO), the control unit 210 waits until the RNO transmitted from the wireless device 22 that is the distribution destination is received.

  When the RNO transmitted from the wireless device 22 as the distribution destination is received (S103: YES), the control unit 210 transmits a request to the transmission source of the RNO through the narrow area wireless communication unit 213 (step S104).

  Next, the control unit 210 determines whether or not the narrow area wireless communication unit 213 has received the RACK transmitted from the wireless device 22 as a response to the request (step S105). When the RACK is not received (S105: NO), the control unit 210 waits until the RACK transmitted from the wireless device 22 is received.

  If it is determined that the RACK has been received (S105: YES), the control unit 210 establishes a link with the radio device 22 that is the RACK transmission source (step S106), and sends the signal addressed to the meter 23 to the narrow-band radio communication unit. It transmits through 213 (step S107).

  If it is determined in step S101 that a signal addressed to the meter 23 has not been received (S101: NO), the control unit 210 determines whether a signal addressed to the center 10 has been received by the narrow area wireless communication unit 213. (Step S108).

  When the signal addressed to the center is received (S108: YES), the control unit 210 transmits the received signal to the center 10 through the NCU 20 connected to the connection unit 212 (step S109). When the signal addressed to the center has not been received (S108: NO), the control unit 210 returns the process to step S101.

  As described above, in the first embodiment, when the gateway wireless device 21 receives a signal transmitted from the center 10 to the meter 23, the signal is transmitted according to the group of the wireless devices 22 to which the destination meter 23 is connected. By performing the previous assignment, wireless communication between the wireless devices 22 and 22 belonging to different groups is avoided.

(Embodiment 2)
In the second embodiment, a configuration in which wireless devices 22A to 22C belonging to a plurality of narrow-area wireless networks NA to NC share one gateway wireless device 21 will be described.
The overall configuration of the radio telemeter system in Embodiment 2 and the internal configurations of the NCU 20, the gateway radio 21 and the radio 22 are the same as those in Embodiment 1, and will not be described.

  FIG. 9 is an explanatory diagram for explaining the operation of the gateway radio 21 according to the second embodiment. The gateway radio 21 according to the second embodiment receives the signals transmitted from the radios 22A to 22C and transfers them to the center 10 to transfer the network numbers (0x123451, 0x123452, 0x123454) of the narrow area radio networks NA to NC. ) In the storage unit 211.

  When the gateway radio 21 is ready to receive the signal transmitted from the radio 22, the gateway radio 21 sequentially transmits RNOs including the respective network numbers as group IDs through the narrow area radio communication unit 213. For example, the gateway wireless device 21 transmits an RNO including a network number “0x123451” as a group ID at a certain timing, and then transmits an RNO including a network number “0x123452” as a group ID at the next timing. At the next timing, RNO including the network number “0x123454” as the group ID is transmitted.

  When the wireless device 22A that can directly communicate with the gateway wireless device 21 has a signal to be transmitted to the center 10, the network number of the narrow-area wireless network NA among the RNOs transmitted from the gateway wireless device 21 is set to the group ID. It will be in the state of waiting for reception which waits for RNO included. When the wireless device 22A receives an RNO including the network number (0x123451) of the narrow-area wireless network NA as a group ID from the gateway wireless device 21, the wireless device 22A transmits a request to the gateway wireless device 21 and establishes a link with the gateway wireless device 21. Establish. After establishing the link with the gateway radio 21, the radio 22 </ b> A transmits a signal addressed to the center 10 to the gateway radio 21.

  The operations of the wireless devices 22B and 22C that can directly communicate with the gateway wireless device 21 are the same as those of the wireless device 22A. That is, when the radio units 22B and 22C have a signal to be transmitted to the center 10, among the RNOs transmitted from the gateway radio unit 21, the network numbers (0x123452, 0x123454) of the narrow-area radio networks NB and NC are grouped. It will be in the state of waiting for reception which waits for RNO included as ID. When receiving the RNO including each network number, the radio devices 22B and 22C establish a link by transmitting a request to the gateway radio device 21 and transmit a signal addressed to the center 10 to the gateway radio device 21.

  As described above, in the second embodiment, by sequentially transmitting a plurality of types of RNOs having different network IDs from the gateway wireless device 21, a plurality of wireless devices 22A to 22C belonging to a plurality of narrow-area wireless networks NA to NC are connected. Thus, one gateway radio 21 can be shared. Further, in the second embodiment, since one gateway radio 21 emulates a plurality of gateway radios, a plurality of narrow areas can be obtained without adding new functions to the radios 22A to 22C. The wireless networks NA to NC can be handled by one gateway radio 21.

(Embodiment 3)
In the third embodiment, the gateway radio 21 and the radios 22A to 22C store each other's network ID, and the link is established when the RNO including the network number stored as each group ID is received. The configuration to be performed will be described.
Note that the overall configuration of the wireless telemeter system in Embodiment 3 and the internal configurations of the NCU 20, the gateway wireless device 21, and the wireless device 22 are the same as those in Embodiment 1, and therefore the description thereof is omitted.

  FIG. 10 is an explanatory diagram for explaining the operation of the gateway radio 21 according to the third embodiment. It is assumed that a unique network number (for example, 0x123456) is assigned in advance to the gateway radio 21 according to the third embodiment. In addition, the gateway radio 21 receives the signals transmitted from the radios 22A to 22C and transfers them to the center 10, so that the network numbers (“0x123451”, “0x123452”, “0x123451”, “ 0x123454 ") is stored in the storage unit 211.

  On the other hand, each of the wireless devices 22A to 22C belonging to the narrow area wireless networks NA to NC stores the network number assigned thereto and the network number (0x123456) of the gateway wireless device 21 in the storage unit 221.

  When the gateway radio 21 is in a state in which a signal transmitted from the radio 22 can be received, the gateway radio 21 transmits an RNO including its own network number (0x123456) as a group ID through the narrow area radio communication unit 213.

  When the radio 22A receives the RNO transmitted from the gateway radio 21 and has a signal to be transmitted to the center 10, the group ID (0x123456) included in the received RNO is stored in the storage unit 221. Since it matches the stored network number, it is determined that the RNO transmission source (gateway radio 21) is a valid transmission destination. After transmitting a request to the received RNO, the wireless device 22A establishes a link with the gateway wireless device 21 and transmits a signal to be transmitted to the center 10 to the gateway wireless device 21 through the narrow area wireless communication unit 222. .

  The wireless devices 22B and 22C belonging to the narrow area wireless networks NB and NC are the same as the wireless device 22A. That is, when the radios 22B and 22C receive the RNO transmitted from the gateway radio 21, and have a signal to be transmitted to the center 10, the group ID (0x123456) included in the received RNO is Since it matches the network number stored in the storage unit 221, it is determined that the RNO transmission source (gateway radio 21) is a valid transmission destination. After transmitting a request to the received RNO, the wireless devices 22B and 22C establish a link with the gateway wireless device 21 and send a signal to be transmitted to the center 10 to the gateway wireless device 21 through the narrow area wireless communication unit 222. Send.

  As described above, in the third embodiment, the gateway wireless device 21 has a unique network number, and the gateway wireless device 21 and the wireless devices 22A to 22C store each other's network IDs, thereby allowing a plurality of narrow areas. One gateway radio 21 can be shared among a plurality of radios 22A to 22C belonging to the radio networks NA to NC.

(Embodiment 4)
In the fourth embodiment, a configuration in which the validity of a transmission destination is determined by a logical operation of the network number assigned to the gateway radio 21 and the network numbers of the respective narrow-area wireless networks NA to NC will be described.
The overall configuration of the radio telemeter system in Embodiment 4 and the internal configurations of the NCU 20, the gateway radio 21 and the radio 22 are the same as those in Embodiment 1, and will not be described.

  FIG. 11 is an explanatory diagram for explaining the operation of the gateway radio 21 according to the fourth embodiment. It is assumed that a unique network number (for example, 0x12345F) is assigned in advance to the gateway radio 21 according to the fourth embodiment. The network number assigned to the gateway radio 21 is characterized in that all of a specific range (lower 4 bits) in the sequence of bits is set to “1”. The gateway radio 21 stores its own network number and a mask value described later in the storage unit 211.

  On the other hand, the network numbers of the narrow-area wireless networks NA to NC are set to, for example, “0x123451”, “0x123451”, and “0x123454”. These network numbers are characterized in that any one bit in a specific range (lower 4 bits) is set to “1” and the remaining 3 bits are set to “0”. That is, the lower 4 bits of the network number of the narrow area network NA are set to “0001”. The network number of the narrow area wireless network NB is set to “0010” in the lower 4 bits, and the network number of the narrow area network NC is set to “0100” in the lower 4 bits.

  When the gateway radio 21 receives the RNO, “logical product of each bit of its own network number and mask value” is equal to “logical product of each bit of the network number and mask value of the communication partner” Judge that it is a legitimate communication partner. Here, “0xFFFFF0” can be used as the mask value.

  For example, when the gateway radio 21 receives an RNO from the radio 22A, the logical product of each bit of “0x12345F” and “0xFFFFF0” is “0x123450”, and each bit of “0x123451” and “0FFFFF0” Since the logical product of “0x123450” is equal to each other, it can be determined that the wireless device 22A is a valid communication partner. The same applies when the gateway radio 21 receives the RNO from the radios 22B and 22C, and it can be determined that each is a valid communication partner.

  If an RNO transmitted from a wireless device (not shown) belonging to another operator's wireless network having a network number of “0x234561” is received, the logical product of each bit of “0x12345F” and “0xFFFFF0” is The logical product of each bit of “0x123450” and “0x234561” and “0FFFFF0” is “0x234560”, and the two are different, so the gateway radio 21 determines that the radio is not a valid communication partner. can do.

  On the other hand, when the radio device 22 receives the RNO, “the logical product of each bit of its own network number and the mask value” is equal to “the logical product of each bit of the network number of the communication partner and the mask value”. If “the logical product of each bit of the network number of the own device and the network number of the communication partner” is equal to “the network number of the own device”, it can be determined that the communication device is a valid communication partner.

  For example, when the radio 22A receives an RNO from the gateway radio 21, the logical product of each bit of “0x123451” and “0xFFFFF0” and the logical product of each bit of “0x12345F” and “0xFFFFF0” are both “0x123450”. The logical product of each bit of “0x123451” and “0x12345F” is “0x123451”, which is equal to the network number of the wireless device 22A. Therefore, the radio device 22A can determine that the gateway radio device 21 is a valid communication partner.

  When the wireless device 22A receives the RNO from the wireless device 22B, the logical product of each bit of “0x123451” and “0xFFFFF0” and the logical product of each bit of “0x123452” and “0xFFFFF0” are both “ 0x123450 ", but the logical product of each bit of" 0x123451 "and" 0x123452 "is" 0x123450 ", which is different from the network number of the radio 22A. It can be determined that it is not the other party.

  In the present embodiment, when the radio 22 receives the RNO, the “logical product of each bit of the network number of the own device and the mask value” is “the bit number of each bit of the network number of the communication partner and the mask value”. Using the condition that "logical product" is equal to "logical product" and the condition that "logical product of each bit of its own network number and the network number of the communication partner" is equal to "network number of its own device" However, the communication partner's legitimacy is determined using only the condition that “the logical product of each bit of the own network number and the network number of the communication partner” is equal to “the network number of the own device”. It is good also as a structure which judges sex.

  As described above, in the fourth embodiment, the legitimacy of the communication partner can be determined by a logical operation between network numbers or a logical operation between a network number and a predetermined mask value.

  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.

  For example, in the first to fourth embodiments, the wireless devices 22 are classified according to the network numbers of the narrow-area wireless networks NA to NC, but each wireless device 22 is divided into a plurality of groups according to the attributes of the wireless devices 22. In other words, a group ID for identifying a group may be used instead of the network number.

  In the first to fourth embodiments, when the gateway wireless device 21 or the wireless devices 22A to 22C receives the RNO, it is configured to determine whether or not the transmission source of the RNO is a valid communication partner. When a request transmitted as an RNO response is received, it may be configured to determine whether or not the transmission source of the request is a valid communication partner.

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

  The wireless telemeter system of the present application can wirelessly communicate with the first wireless device (22) via a plurality of first wireless devices (22) to which a meter (23) is connected and a wireless network (NA to NC). And a radio telemeter system including a second radio (21) capable of communicating with a communication device (10) connected to a communication network (N) different from the radio networks (NA to NC), A first wireless device (22), a determination unit (220) for determining whether or not a signal transmitted from the second wireless device (21) or another first wireless device (22) is receivable; When it is determined that reception is possible, the wireless device ID is an identifier of the own device, and the identifier of the group to which the own device belongs among a plurality of groups that classify each first wireless device (22) according to the attribute. Intermittent ID notification signal including group ID The second wireless device (21) includes a wireless device ID of each first wireless device (22) and a meter (23) connected to the first wireless device (22). A storage unit (211) that stores and associates at least one of meter IDs that are identifiers and a group ID of a group to which the first wireless device (22) belongs; and a first wireless device (22) or a meter (23). When a signal from the communication device (10) as a destination is received through the communication network (N), a transfer to which the received signal is transferred with reference to the association of each ID stored in the storage unit (211) A discrimination unit (210) that discriminates a previous group, a reception unit (213) that receives an ID notification signal transmitted from the transmission unit (222), and a group ID included in the received ID notification signal are the discrimination Part (210 Corresponds to the group ID of the determined group, the communication connection unit (210) that establishes a communication connection with the first wireless device (22) that is the transmission source of the ID notification signal, and the first wireless that establishes the communication connection And a transfer unit (213) for transferring a signal from the communication device (10) to a machine (22).

  In the present application, when the second radio device receives a signal addressed to a meter transmitted from an external communication device, distribution of the transmission destination is performed according to the group of the first radio device to which the destination meter is connected. Thus, wireless communication between wireless devices belonging to different groups can be avoided. That is, in the present application, since the signal can be transmitted and received after judging the validity of the communication path, it is possible to clarify the operational responsibility of the operator who manages the wireless devices connected to each wireless network.

  In the radio telemeter system of the present application, the second radio device (21) can receive the determination unit (210) that determines whether or not the signal transmitted from each first radio device (22) can be received. If it is determined, the ID notification signal including the wireless device ID that is the identifier of the second wireless device (21) and any one of the group IDs is transmitted intermittently by sequentially changing the group ID. Each of the first wireless devices (22) includes a transmitter (213), and each of the first wireless devices (22) receives an ID notification signal transmitted from the second wireless device (21) or another first wireless device (22). 222) and data to be transmitted to the communication device (10), and the group ID included in the ID notification signal received from the second wireless device (21) corresponds to the group ID of the own device. Establish communication connection with the second radio (21) Communication connection unit and a (220) that, and transmits a signal including the data to the was establishing a communication connection the second radio (21).

  In the present application, one second radio can be shared among first radios belonging to a plurality of radio networks by sequentially transmitting a plurality of types of RNOs having different group IDs from the second radio. Further, in the present application, since one second wireless device has a configuration in which a plurality of second wireless devices are emulated, the second wireless device belongs to a plurality of wireless networks without adding a new function to the first wireless device. Communication with one radio can be handled by one second radio.

  In the wireless telemeter system of the present application, the second wireless device (21) has a unique group ID assigned to the second wireless device (21), and is a signal transmitted from each first wireless device (22). A determination unit (210) that determines whether or not it is possible to receive, and if it is determined that reception is possible, a wireless device ID that is an identifier of the second wireless device (21), and the unique group ID Each of the first wireless devices (22) includes a storage unit (221) for storing the unique group ID, and the second wireless device. (21) or a receiving unit (222) that receives an ID notification signal transmitted from another first wireless device (22), and data that should be transmitted to the communication device (10), and the received ID The group ID included in the notification signal is the unique group In the case of D, a signal including the data to the second wireless device (21) having the communication connection unit (220) for establishing a communication connection with the second wireless device (21). Is transmitted.

  In the present application, the second wireless device has a unique group ID, and the first wireless device and the second wireless device store each other's group ID, so that a plurality of first wireless devices belonging to a plurality of wireless networks can be connected. One second radio can be shared.

  In the wireless telemeter system of the present application, the second wireless device (21) includes a plurality of bits as an identifier of a group to which the second wireless device (21) belongs, and bits in a specific range among the plurality of bits. And a determination unit (210) that determines whether or not a signal transmitted from each first wireless device (22) is receivable, and has a group ID in which all are set to 1. A transmission unit (213) that intermittently transmits an ID notification signal including an identifier of the second wireless device (21) and the group ID, and includes each first wireless device (22). ) Is a group having the same number of bits as the group ID of the second radio (21) as an identifier of the own group, and setting any one bit to 1 among the bits in the same range as the specific range ID A receiving unit (222) for receiving an ID notification signal transmitted from two wireless devices (21) or another first wireless device (22), and having data to be transmitted and included in the received ID notification signal Communication connection unit (222) that establishes a communication connection with the transmission source of the ID notification signal when the logical product of each bit of the group ID and the group ID of the own group matches the group ID of the own group. And a signal including the data is transmitted to a transmission source of the ID notification signal that has established a communication connection.

  In the present application, the legitimacy of the communication partner can be determined by a logical operation between group IDs.

  In the wireless telemeter system of the present application, the communication connection units (220, 210) of the first wireless device (22) and the second wireless device (21) have data to be transmitted, and the received ID notification signal When the logical product of each bit of the included group ID and each bit of the predetermined mask value is equal to the logical product of each bit of the group ID of the own group and each bit of the mask value, the ID notification A communication connection is established with a signal source.

  In the present application, the legitimacy of the communication partner can be determined by a logical operation between the group ID and a predetermined mask value.

  The communication device of the present application is capable of wireless communication via a plurality of wireless devices (22) to which a meter (23) is connected via a wireless network (NA to NC), and the wireless network (NA to NC) In the communication device (21) capable of communicating with the external device (10) connected to a different communication network (N), the wireless device ID that is the identifier of each wireless device (22) and the wireless device (22) are connected. A storage unit (211) that associates and stores at least one of meter IDs that are identifiers of the meter (23) and a group ID of a group to which each wireless device (22) belongs, and one wireless device (22) or When a signal transmitted from the external device (10) is received with the meter (23) as a destination, a transfer destination to which the received signal is transferred with reference to the association of each ID stored in the storage unit (211) The group of A determination unit (210), a reception unit (213) that receives an ID notification signal including a wireless device ID and a group ID, and a group that is determined by the determination unit (210) based on a group ID included in the received ID notification signal In the case of the group ID, the communication connection unit (210) that establishes a communication connection with the transmission source of the ID notification signal, and the signal from the external device (10) is transferred to the transmission source that establishes the communication connection. And a transfer unit (213).

  In the present application, when the second radio device receives a signal addressed to a meter transmitted from an external communication device, distribution of the transmission destination is performed according to the group of the first radio device to which the destination meter is connected. Thus, wireless communication between wireless devices belonging to different groups can be avoided.

10 center 20 NCU
21 Gateway radio 22A-22C Radio 23A-23C Meter 200, 220, 220 Control unit 201, 211, 221 Storage unit 202 Wide area wireless communication unit 203, 212 Connection unit 204, 214, 224 Display unit 205, 215, 225 Operation Part 213, 222 narrow area wireless communication part 223 connection port 229 battery

Claims (6)

A plurality of first wireless devices to which a meter is connected, and wireless communication with the first wireless device via a wireless network, and communication with a communication device connected to a communication network different from the wireless network. In a wireless telemeter system comprising a second radio that is possible,
Each first radio is
A determination unit that determines whether or not a signal transmitted from the second wireless device or another first wireless device can be received;
When it is determined that reception is possible, the wireless device ID that is the identifier of the own device, and the group ID that is the identifier of the group to which the own device belongs among a plurality of groups that classify each first wireless device according to the attribute, A transmission unit that intermittently transmits an ID notification signal including
The second radio is
A storage unit that associates and stores at least one of a radio ID of each first radio and a meter ID that is an identifier of a meter connected to the first radio, and a group ID of a group to which the first radio belongs. When,
When a signal from the communication device destined for the first radio or meter is received through the communication network, the association of each ID stored in the storage unit is referred to and the transfer destination to which the received signal should be transferred A discriminator for discriminating a group;
A receiving unit for receiving the ID notification signal transmitted from the transmitting unit;
When the group ID included in the received ID notification signal corresponds to the group ID of the group determined by the determination unit, a communication connection unit that establishes a communication connection with the first wireless device that is the transmission source of the ID notification signal;
A wireless telemeter system comprising: a transfer unit configured to transfer a signal from the communication device to a first wireless device that has established a communication connection. The second radio is
A determination unit that determines whether or not a signal transmitted from each first wireless device can be received;
When it is determined that reception is possible, an ID notification signal including a wireless device ID that is an identifier of the second wireless device and any one group ID is transmitted by sequentially changing the group ID. The department and
Each first radio is
A receiving unit for receiving an ID notification signal transmitted from the second radio or another first radio;
If there is data to be transmitted to the communication device and the group ID included in the ID notification signal received from the second radio device corresponds to the group ID of the own device, the communication connection with the second radio device is established. A communication connection to be established, and
The radio telemeter system according to claim 1, wherein a signal including the data is transmitted to the second radio device having established a communication connection. The second radio is
Having a unique group ID assigned to the second radio,
A determination unit that determines whether or not a signal transmitted from each first wireless device can be received;
A transmitter that intermittently transmits an ID notification signal including a radio ID that is an identifier of the second radio and the unique group ID when it is determined that the second radio can be received;
Each first radio is
A storage unit for storing the unique group ID;
A receiving unit for receiving an ID notification signal transmitted from the second radio or another first radio;
A communication connection unit that establishes a communication connection with the second radio when the group ID included in the received ID notification signal corresponds to the unique group ID and has data to be transmitted to the communication device; With
The radio telemeter system according to claim 1, wherein a signal including the data is transmitted to the second radio device having established a communication connection. The second radio is
As the identifier of the group to which the second radio belongs, it has a group ID consisting of a plurality of bits, and all the bits in a specific range of the plurality of bits are set to 1,
A determination unit that determines whether or not a signal transmitted from each first wireless device can be received;
A transmission unit that intermittently transmits an ID notification signal including a radio ID that is an identifier of the second radio and the group ID when it is determined that reception is possible;
Each first radio is
As an identifier of the own group, it has the same number of bits as the group ID of the second radio, and has a group ID in which one of the bits in the same range as the specific range is set to 1,
A receiving unit for receiving an ID notification signal transmitted from the second radio or another first radio;
When the logical product of each bit of the group ID included in the received ID notification signal and each bit of the group ID of the own group matches the group ID of the own group, the data to be transmitted A communication connection unit for establishing a communication connection with the transmission source of the ID notification signal,
The radio telemeter system according to claim 1, wherein a signal including the data is transmitted to a transmission source of the ID notification signal that has established a communication connection. The communication connection part of the first radio and the second radio is
The logical product of each bit of the group ID included in the received ID notification signal having data to be transmitted and each bit of the predetermined mask value is the bit of the group ID of the own group, 5. The wireless telemeter system according to claim 4, wherein a communication connection is established with a transmission source of the ID notification signal when the logical product with each bit of the mask value is equal. In a communication device capable of wireless communication via a wireless network with a plurality of wireless devices connected to a meter, and capable of communicating with an external device connected to a communication network different from the wireless network,
A storage unit that associates and stores at least one of a wireless device ID that is an identifier of each wireless device and a meter ID that is an identifier of a meter connected to each wireless device, and a group ID of a group to which each wireless device belongs;
When a signal transmitted from the external device is received with one wireless device or meter as a destination, the association of each ID stored in the storage unit is referred to, and a transfer destination group to which the received signal is to be transferred is determined. A discriminator to perform,
A receiving unit for receiving an ID notification signal including a wireless device ID and a group ID;
When the group ID included in the received ID notification signal corresponds to the group ID of the group determined by the determination unit, a communication connection unit that establishes a communication connection with the transmission source of the ID notification signal;
And a transfer unit that transfers a signal from the external device to the transmission source that has established a communication connection.

Images