JP2006048459A - Radio data communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and efficiently match a radio master unit and a radio slave unit without taking time. <P>SOLUTION: To the radio slave unit, individual information constituted of a part of identification codes is inputted and set. The radio master unit transmits a radio message including the individual information to the radio slave unit corresponding to a matching request message from a center side device. At the time of receiving the radio message, the radio slave unit confirms whether or not the individual information in the message matches with the one of itself. When it matches, a response message is transmitted to the radio master unit. At the time of confirming that the individual information in the received response message matches with the transmitted individual information, the radio master unit registers the matching information of the radio slave unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless slave device in which a terminal device is connected between a terminal network control device connected to a center side device via a communication line such as a public telephone line and a terminal device such as a gas meter, a water meter, and a sensor. Alternatively, the present invention relates to a wireless data communication system such as a wireless telemeter system in which a relay device transmits data through a wireless master device or a security system for reporting an abnormal situation.

  The wireless telemeter system includes a terminal-side network control device (hereinafter abbreviated as T-NCU) connected to a center-side device via a communication line, a wireless master device connected to the T-NCU, a wireless master device, and a wireless device. It is composed of a plurality of wireless slave devices that communicate via a line, and terminal devices such as gas, water, and electricity meters and sensors connected to the wireless slave devices. The wireless master device and the wireless slave device are collectively referred to as a wireless device.

  In the radio telemeter system, radio communication is performed by a specific low-power radio station according to the standard ARIB STD-T67. In order to perform wireless communication, identification information such as the ID of each other must be registered when the wireless master device and the wireless slave device are installed. When both parties acquire each other's ID, and the other party's ID is stored in a memory and registered, it is called a match.

  As a method of this framing, after setting initial data such as ID by a setting device or setting initial data by a dip switch provided in the wireless device in one or both of the wireless master device and the wireless slave device, Register by connecting the wireless master unit and the wireless slave unit by wire and exchanging data with each other, operating the dedicated switch of the wireless master unit and the wireless slave unit almost simultaneously, and exchanging data by wireless communication The method is known.

  For example, Patent Document 1 describes a method for exchanging data by connecting a wireless meter reading device corresponding to a wireless master device and a wireless transmission / reception device of a measuring device corresponding to a wireless slave device with a cable. Yes. Patent Document 2 describes a method in which a connection terminal for an ID code setting device is provided in a wireless transmission / reception apparatus, and data necessary for the wireless master device and each wireless slave device is set and registered by the setting device.

  The rimming work will be specifically described. An ID is registered in advance in the wireless slave device to be matched, but this ID is usually composed of about 14 digits. As a procedure, after a person sets an ID in a setting device, communication is performed between the setting device and the wireless slave device, thereby registering in the wireless slave device. Alternatively, registration is performed by a person operating a dip switch provided in the wireless slave unit. This ID is inserted into the telegram to designate one of the plurality of wireless slave devices that have started operation, and is set in each wireless slave device before the operation of the communication system. Is done. The wireless master device that has received the message from the center side device determines which wireless slave device should be wirelessly transmitted from the ID in the message. Therefore, the ID needs to be set as match information.

Next, by connecting the wireless master device and the wireless slave device set with the ID by wire and exchanging data on the ID, communication method, etc. Data exchange is performed by wireless communication. Here, in the wireless data exchange scheme, the wireless master device and the dedicated switch for the wireless slave device are simultaneously input in order to prevent data exchange with wireless devices in different areas.
JP-A-6-348986 JP-A-6-284475

  In the method of connecting the wireless master unit and the wireless slave unit by wire, the work of connecting the cable is troublesome. In addition, it is necessary to set initial data for each wireless device. When there are a large number of wireless slave units, a considerable time is required for the assembling operation, and work efficiency is poor. Also, in the method of wireless communication using a dedicated switch, both of the wireless devices to be linked must be operated almost simultaneously, and multiple workers are required to perform at the site, and communication between each worker is unified. Must be planned. For this reason, since it takes a long time for humans to intervene in the matching work, work mistakes cannot be avoided.

  In view of the above, an object of the present invention is to provide a wireless data communication system that can easily and efficiently perform an assembling work without taking time.

  In the present invention, a center side device and a terminal network control device are connected via a communication line, and a wireless master device connected to the terminal network control device and wireless communication with the wireless master device directly or via a relay device The wireless master device transmits a registration request message including individual information related to the identification code of the wireless slave device or the relay device, and the wireless slave device or the relay device , Holding the individual information in advance, and when the individual information in the message received from the wireless master device matches the individual information held by itself, send a response message to the wireless master device, The wireless master device registers an identification code of the wireless slave device or the relay device when receiving the response message from the wireless slave device or the relay device.

  In response to the registration request from the center side device, the wireless master device transmits a registration request message to a plurality of wireless slave devices or relay devices. The wireless master device may create and transmit a registration request message based on an input from a setting device or the like.

  When the individual information is set in the wireless slave unit or the relay unit, the wireless slave unit or the relay unit holds the individual information in advance. At this time, the wireless slave unit or the relay unit is activated and is ready to receive. The wireless slave device or the relay device receives the message from the wireless master device, and registers the identification code of the wireless master device included in the message when the individual information in the message matches the individual information held by itself. Thereafter, a response message is transmitted to the wireless master unit. When the wireless master device receives a response message from the wireless slave device or relay device, it registers the identification code and individual information of the wireless slave device or relay device as margin information, and also registers the registration of the margin with the center side device. Send. The above-described operation for assembling is similarly performed between the relay device and the wireless slave device, with the relay device serving as a substitute for the wireless master device.

  Note that the registration request from the center side device includes the identification code and individual information of the wireless slave unit or repeater to be registered. And individual information should just be a code unique for every radio | wireless subunit | mobile_unit or a relay machine, for example, is comprised from a part of identification code | symbol. Alternatively, a unique code may be assigned. This individual information can be used as an ID for specifying a communication partner when the center side device performs data communication, and there is no need to separately set a dedicated ID for data communication.

  The relay device or the wireless slave device adds information shared with the center side device or the wireless master device to the response message. Since the information shared by each other is information that a third party cannot know, by confirming this information, it is possible to identify the wireless slave unit or repeater that is the target of the association, and the communication reliability for the association Will increase. Here, the meter reading value of the meter connected to the repeater or wireless slave is added to the response message as shared information. Alternatively, encrypted information may be added. The center side apparatus or the wireless master unit holds a key for decrypting the cipher, decrypts the encrypted information, and authenticates the wireless slave unit or the relay unit as the target of the association.

  According to the present invention, in the assembling work, by setting individual information in the wireless slave unit or the repeater, it is possible to perform the assembling by wireless communication, and it is sufficient to perform the work only on the wireless slave unit or the repeater side. Tesumu. In addition, since the individual information is simpler than the identification code, input errors when setting are reduced, and the work time is also shortened. Therefore, it is possible to reliably rim while shortening the time, and an efficient rim work can be performed.

  A wireless data communication system of this embodiment is shown in FIG. This system is a wireless telemeter system that transmits meter reading data from a terminal side to a center side device through a communication line. The center side device includes a host computer 1 and a center side network control device 2, and a center side via a telephone line 3. A terminal network control unit (T-NCU) 4 connected to the network control unit 2, a wireless master unit (hereinafter referred to as “main”) 5 connected to the T-NCU 4 by wire, and 1 capable of wireless communication with the main 5 One or a plurality of wireless slave units (hereinafter referred to as sub) 6 is connected, and terminal devices such as a meter 7 and sensors are connected to the main 5 and sub 6. Furthermore, when the main 5 and the sub 6 are separated and direct wireless communication is not possible, a relay 8 having a wireless communication function is interposed between the main 5 and the sub 6. The relay device 8 is also connected to terminal devices such as a meter 7 and a sensor. Note that one or more mains 5 may be connected to the T-NCU 4.

  As shown in FIG. 2, the main 5 includes an antenna 10, a wireless communication unit 11 for performing wireless communication, a CPU 12, a ROM 13, a RAM 14, a control unit 15 that controls the entire device, and a terminal network control device 3, a T-NCU interface 16 for communicating with the communication device 3, a non-volatile memory 17 for storing information necessary for communication such as association information, and a battery 18 as a power source.

  The sub 6 includes the antenna 20, the wireless communication unit 21, the CPU 22, the ROM 23, the control unit 25 including the RAM 24, the nonvolatile memory 26, and the battery 27 as well as the main 5 and communicates with the connected meter 7 or sensor. And a meter / sensor interface 28. In addition, an external input device 29 that receives external input from a setting device or the like is provided. The repeater 8 is a wireless device having the same configuration as the sub 6.

  In order to establish a relationship, the control unit 15 of the main 5 transmits a request message to the sub 6 in response to a registration request from the center side device, and when a response message is received from the sub 6, Means for registering the identification code of sub 6 and means for transmitting a response message from sub 6 to the center side device; When the response message from the sub 6 cannot be obtained, the center side device is notified of the failure to register.

  Here, the match request message transmitted from the center side device includes the identification code of the sub 6 to be matched and the individual information related to this identification code. This unique individual information is composed of a part of the identification code, and is different from the individual information of the other sub 6 and the repeater 8 in the communication system.

  On the other hand, the control unit 25 of the sub 6 matches the means for confirming whether the individual information in the marriage request message received from the main 5 matches the individual information based on the individual information held in advance. When it is confirmed that there is a message, it has means for registering the identification code of the main 5 in the match request message, and means for transmitting a response message to the main 5. In addition, when receiving an input from the external input device 29, the control unit 25 activates the wireless communication unit 21 so as to start wireless reception.

  The assembling operation of the main 5 and the sub 6 will be described with reference to FIG. Here, it is assumed that the identification ID that is the identification code of the main 5 is “00000000000001”, the identification ID that is the identification code of the sub 6 is “000000000000101”, and the identification ID that is the identification code of the repeater 8 is “00000000000021”. This identification code is information necessary for communication, and each wireless device stores its own identification code.

  First, in the sub 6, individual information composed of a part of the identification code is set. By operating the setting device or the DIP switch, the individual information is input to the external input device 29, and for example, only the last two digits “11” of the identification code are set (3a). The individual information is determined in advance when the communication system is constructed, and the center side apparatus has individual information for the sub 6 that is newly installed or replaced. The operator sets based on this.

  The match request message shown in FIG. 4 is transmitted from the center side device to the main 5 (3c). The identification target device ID of the marriage request message contains the identification ID “00000000000011” of the sub 6 that is the target wireless device of the marriage, and the first connection point ID is the identification ID of the wireless device that is to be received first from the main 5 The last two digits, that is, “11” of individual information is entered.

  When the received message is the match request message shown in FIG. 4 and the match target machine ID and the first connection point ID in the message are unregistered as match information, the main 5 shows the received message. 5 is wirelessly transmitted to an unspecified sub 6. The first connection point ID “11” is entered in the transmission destination ID of the wireless message, and “000000000000” indicating an unspecified terminal is entered in the transmission destination identification code (3d).

  On the other hand, in sub 6 to be matched, since there is an input to the external input device 29 in advance, wireless reception is possible, and reception of the marriage request message is allowed intermittently for a predetermined time (3b). This is to avoid wireless communication with sub 6 other than the target sub 6 when exchanging the margin information in a wireless system. For this reason, the sub 6 that is not to be matched does not perform the reception operation. When the marriage target sub 6 receives the marriage request message from the main 5, it checks whether the marriage target machine ID and the transmission destination ID both coincide with the individual information and the self identification ID held in advance. If they are different, the received message is discarded and intermittent radio reception is continued. If they match, the sub 6 stores the transmission source identification code, which is the identification ID of the main 5 in the message, as the association information in the memory 26, and registers the association information (3e). Thereafter, the sub 6 puts its own identification ID as a transmission source identification code in accordance with the wireless message format shown in FIG. 6, creates an marriage request response message including the marriage target machine ID, and returns it to the main 5 (3f). .

  The main 5 is in a wireless reception state after wirelessly transmitting the match request message, and can receive the match request response message from the sub 6. When the main 5 receives the match request response message, the main 5 confirms whether the transmission destination identification code matches its own identification ID and whether the match target machine ID matches that contained in the match request message. Only in the case of coincidence, the transmission source identification code and the 14-digit machine target ID are related to each other, the identification ID of the sub-object 6 to be framed and the individual information are stored in the memory 17, and the group information is registered (3g). Then, the main 5 returns a match request completion message shown in FIG. 7 to the center side device (3h). The center side device registers the sub 6 that has been assembled.

  As a result, the matching work is completed, and when the main 5 receives a message containing a 14-digit identification ID indicating sub 6 from the center side device, it converts the matching information into the wireless message shown in FIG. The received message from the center side device is transmitted to the sub 6 designated as the communication partner. If the transmission destination ID and the identification code in the received wireless message match the ID of the sub 6 and the transmission source identification code registered as the communication partner in the match information matches that in the message, the sub 6 It is determined that the message is In this way, the set individual information is used as an ID for identifying the communication partner, and the received message from the center side device is processed, thereby enabling mutual communication without erroneous connection.

  Therefore, the number of digits of the individual information for registering the sub 6 can be only the number of digits necessary for distributing the sub 6 managed by the main 5. For example, if the ID is expressed in hexadecimal notation, a value from “00” to “FF” can be taken, so that a sub 6 that can be managed by one main 5 is a communication system with up to 256 units. Further, the input work performed by the worker through the external input device 208 is only on the sub 6 side.

  Next, the edge assembly operation when the relay device 8 is present will be described with reference to FIG. The repeater 8 requires not only an edge with the main 5 but also an edge with the sub 6. The edge between the main 5 and the repeater 8 is edged in the same manner as the edge operation between the main 5 and the sub 6 described above. When the relay unit 8 that is combined with the main 5 performs the connection with the sub 6, the first connection point ID of the main 5 is changed to the last two digits “21” of the identification ID of the relay unit 8. The message for requesting the marriage from the center side device is received (9c).

  In the main 5, since the individual information “21” indicated by the first connection point ID is already registered as the margin information at the margin between the main 5 and the repeater 8, the transmission destination identification code in the wireless message format shown in FIG. Is wirelessly transmitted using the identification ID of the relay device 17 (9d). When wirelessly receiving, the repeater 8 confirms whether its own individual information and identification ID match the transmission destination ID and transmission destination identification code in the message. If they match, the repeater 8 determines that it is addressed to itself and analyzes the received message. If it is determined by analysis that the matching target machine ID does not match its own individual information and the matching information related to the matching target machine ID has not been registered, the repeater 8 sets the transmission source identification code in its format as shown in FIG. Wireless transmission is performed with the identification ID set to “11” and the transmission destination identification code set to “0” indicating unspecified (9e).

  On the other hand, in sub 6 to be matched, there is an input to the external input device 29 in advance (9b), and a match request message can be received wirelessly. Upon receipt of the message of FIG. 12, the sub 6 confirms that the message is a marriage request message, and confirms whether the transmission destination ID and the marriage target machine ID match their own IDs. If they match, the sub 6 registers the identification ID of the relay device 8 that is the transmission source as the match information (9f). The sub 6 returns the response message with the identification ID of the repeater 8 in the transmission destination identification code according to the radio message format of FIG. 13 (9g).

  The relay station 8 that has received this response message, when the transmission destination identification code matches its own identification ID and the matching target machine ID matches the target machine ID requested for the matching request, The individual information is stored in the memory 26, and the association information is registered (9h). The repeater 8 puts the identification ID of the main 5 into the transmission destination identification code, puts its own identification ID into the transmission source identification code, and sends it back to the main 5 according to the wireless message format of FIG. 13 (9i). When the main 5 receives the response message, the main 5 stores the identification ID and individual information of the sub 6 to be matched in the memory 17 and registers the marriage information (9j). After that, the main 5 returns a match request completion message shown in FIG. 7 to the center side device (9k). The center side device registers the sub 6 that has been assembled. This completes the matching operation.

  As described above, by including the items of the first connection point ID and the target machine ID of FIG. 4 as the ID indicating the edge route in the edge request message, the edge can be easily assembled even when the relay machine 8 is used.

  By the way, in the case of a wireless system, if the connection is performed at the same time in another area where radio waves reach, an erroneous connection may occur. Therefore, as shown in FIG. 14, the sub 6 that has received the match request message reads the meter 7 connected (14a), and makes a response by adding the meter reading value to the wireless message shown in FIG. 15 (14b). The main 5 returns an association request completion message including the meter reading value to the center side device (14c). The other edge operation is the same as that shown in FIG. The same applies when the repeater 8 is interposed.

  The center side device confirms the received meter reading value. Here, since the amount of gas and water meter used is different in each household, the meter reading value also shows a unique value. Therefore, by returning the meter reading value as the margin response, the center side apparatus can confirm which sub 6 has been margined from the meter reading value. As a result, even if a response is received from sub 6 in another area, it can be excluded as a sub 6 that does not correspond, and the reliability of the frame can be improved.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added to the said embodiment within the scope of the present invention. Each wireless communication in the wireless master device, the wireless slave device, and the relay device may use a wireless LAN, PHS, or Bluetooth. The identification code may be an IP address or a MAC address. In addition, the individual information may be assigned a unique code for each sub or relay instead of being part of the identification code. In the main and center side devices, a table indicating a correspondence relationship between identification codes and individual information in each sub or repeater is registered.

Schematic configuration diagram of a radio telemeter system of the present invention A block diagram showing a schematic configuration of a wireless master unit, a wireless slave unit, and a relay unit Flow chart of edge operation between wireless master unit and wireless slave unit The figure which shows the marriage request message format from the center side device The figure which shows the radio | wireless message format of the marriage request from a radio | wireless main unit to a radio | wireless handset The figure which shows the radio message format of the marriage response from the wireless slave to the wireless master The figure which shows the marriage response message format from a wireless main | base station to the center side apparatus The figure which shows the radio message format at the time of operation between the radio master unit and the radio slave unit Sequence diagram of edge assembly operation when a repeater is present The figure which shows the marriage request message format from the center side device The figure which shows the radio message format of the marriage request from the radio master unit to the repeater The figure which shows the radio message format of the marriage response from the repeater to the radio cordless handset The figure which shows the match response message format from the wireless cordless handset to the repeater Sequence diagram when meter reading is performed at the time of edge operation between the wireless master unit and the wireless slave unit The figure which shows the match response message format from the wireless slave to the wireless master

Explanation of symbols

4 Terminal network controller 5 Wireless master unit (main)
6 Wireless cordless handset (sub)
7 Meter 8 Relay machine 15 Control unit 17 Non-volatile memory 25 Control unit 26 Non-volatile memory 29 External input device

Claims (7)

A center side device and a terminal network control device are connected via a communication line, and a wireless master device connected to the terminal network control device and a wireless device for performing wireless communication with the wireless master device directly or via a relay device The wireless master unit transmits a registration request message including individual information related to the identification code of the wireless slave unit or the relay unit, and the wireless slave unit or the relay unit transmits the individual unit in advance. And when the individual information in the message received from the wireless master device matches the individual information held by itself, a response message is transmitted to the wireless master device, and the wireless master device A wireless data communication system, wherein an identification code of the wireless slave unit or the relay device is registered when the response message is received from the wireless slave device or the relay device. A center side device and a terminal network control device are connected via a communication line, and a plurality of wireless base stations connected to the terminal network control device perform wireless communication directly with the wireless base device or via a relay device. A wireless slave device, wherein the wireless master device, in response to a registration request from the center side device, sends a plurality of registration request messages including individual information related to an identification code of the wireless slave device or the relay device. The wireless slave device or the relay device transmits to the wireless slave device or the relay device, and the wireless slave device or the relay device holds the individual information in advance, and the wireless slave device or the relay device in a receivable state transmits the wireless When the electronic message is received from the parent device and the individual information in the electronic message matches the individual information held by itself, the identification code of the wireless parent device included in the message is registered, and the wireless parent device is responded Send a message of the radio When a response message is received from the wireless slave device or the relay device, the device registers an identification code of the wireless slave device or the relay device, and transmits a registration completion message to the center side device. A wireless data communication system. 3. The wireless data communication system according to claim 2, wherein the registration request from the center side device includes an identification code and individual information of a wireless slave unit or repeater to be registered. 4. The wireless data communication system according to claim 2, wherein, when performing registration between a repeater and a wireless slave, the repeater performs a substitute for the wireless master. The wireless data communication system according to any one of claims 1 to 4, wherein the individual information is composed of a part of an identification code. 6. The wireless data communication system according to claim 1, wherein the relay device or the wireless slave device adds information shared with the center side device or the wireless master device to a response message. 7. The wireless data communication system according to claim 6, wherein the meter reading value of the meter connected to the relay or wireless slave is added to the response message as shared information.

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