JP4802973B2 - Automatic meter reading wireless device, automatic meter reading wireless system and program thereof - Google Patents

Description

  The present invention is an automatic meter-reading radio in which a wireless slave unit forms a small-scale group in a 1: N type automatic meter-reading wireless system when metering the usage amount of gas, water, electricity, etc., and changes the upstream and downstream communication means. It is about the system.

  In recent years, with the spread of the Internet, broadband environments have been built up to homes, offices, and factories, and the communication infrastructure has changed greatly. Various devices have been converted to IP, and telephones using analog lines have been changed to IP telephones, which are used without using conventional telephone lines.

  Conventionally, meters installed in homes, offices, factories, etc. have a function to measure the usage of gas, water, electricity, etc., and the data recorded in the meter is transmitted via a communication line such as a telephone. Automatic meter reading systems that collect at automatic meter reading centers have become widespread. Since this automatic meter reading system requires a communication line such as a telephone, the cost including the line contract fee and the line usage fee increases. As a solution to this problem, there is one that uses radio (for example, see Patent Document 1).

  FIG. 12 is a block diagram showing the above-described conventional example, wherein 1 is a wireless master device that receives and sends data in response to an instruction from an automatic meter reading center, and 2 transmits data from the wireless master device to the wireless master device. The wireless slave unit 3 is a meter for measuring gas and the like, and 4 is a data flow.

The operation of the communication device configured as described above will be described. The slave unit z transfers the data to the slave unit y having a higher priority than the slave unit z in order to notify the automatic meter reading center of the data obtained from the meter. The slave unit y sequentially transfers the data received from the slave unit z to the slave units with higher priority. Eventually, the slave device a having the highest priority will transfer data to the master device. As described above, the slave units transfer data in a daisy chain based on the priority order, thereby enabling data transmission with a small transmission output to a remote base unit. By connecting the slave units in a daisy chain, the capital investment of the base unit serving as the base station can be suppressed.
JP 2004-62510 A (Section 6, FIG. 1)

  However, in the conventional configuration, it is necessary to determine the priorities of the slave units in advance, and it is difficult to implement in a large area. In addition, it is difficult to respond to changes in the surrounding environment such as newly constructed buildings or demolished buildings, and the scope of the impact of changes may be large and lack flexibility. there were. In addition, since there is only one type of radio system for the slave unit, a long-range radio frequency band is required for data (downlink) from the master unit. Since the slave unit must communicate with the master unit, it is natural to select the radio of the frequency band used by the master unit. In this case, it is not always effective to suppress the transmission output of the slave unit, and there is a problem that the power consumption required for the slave unit increases depending on the radio frequency band to be used. Furthermore, when the power saving of the slave unit is achieved by changing the radio frequency band, the base unit cannot use the long-distance radio frequency band, and thus the capital investment of the base station cannot be suppressed.

The present invention solves the conventional problems in the previous term, and for data transmission (downlink) from an automatic meter reading center via a base station, long-range wireless communication using a frequency band such as an analog television is performed. In the data transmission (upstream) from the wireless slave unit, near-field wireless communication is performed using a medium- and short-range power-saving radio, and data from the wireless slave unit is transmitted using each wireless slave unit as a relay station. , An automatic meter reading wireless system that can be delivered to the base station by hopping in multiple stages by another wireless slave unit in the vicinity, and flexible automatic that can respond dynamically to changes in the surrounding environment It aims at providing a meter-reading radio system.

  In order to solve the above problem, the automatic meter reading wireless system of the present invention recognizes a specific wireless data from another automatic meter reading wireless device by the time set as an arbitrary time and recognizes it as a slave unit. When a specific wireless data is not received from another automatic meter-reading wireless device before an arbitrarily set time elapses, it is recognized as a master unit and the transmission / reception processing is performed.

  According to this, it is possible to realize a power-saving and efficient automatic meter-reading wireless system that suppresses capital investment of the base station.

  The automatic meter reading wireless system of the present invention recognizes a specific wireless data from another automatic meter reading wireless device before the arbitrarily set time elapses and performs transmission / reception processing by recognizing it as a slave unit. When specific wireless data is not received from other automatic meter-reading wireless devices until the specified time elapses, it is recognized as a master unit and performs transmission / reception processing, reducing base station capital investment and reducing power consumption and efficiency. A meter reading radio system can be realized.

  According to a first aspect of the present invention, there is provided a metering unit that measures the amount of gas used, a wide-area wireless communication unit that transmits and receives wireless data between a base station connected to the automatic meter reading center through a communication line, and a wireless signal transmitted by the wide-area wireless communication unit. A near-field wireless communication unit that performs wireless communication in a range narrower than the communication range, and the near-range wireless communication unit after a time set arbitrarily from when the wide-area wireless communication unit receives wireless data from the base station When certain wireless data is transmitted from other automatic meter-reading wireless devices before the set time elapses, it is recognized as a slave and performs transmission / reception processing. When a specific wireless data is not received from another automatic meter-reading wireless device before the time set in (2) elapses, it is recognized as a parent device and a transmission / reception process is performed.

  According to this, by changing the communication method of data transmission from the base station (downlink) and data transmission from the wireless slave unit (uplink), it is possible to suppress the capital investment of the base station and to flexibly change the surrounding environment Efficient automatic meter-reading wireless system can be constructed.

In the second invention, in particular, in the first invention, the base station transmits route information for transmitting response data.

  According to this, since the wireless slave unit can acquire route information from the base station, it is possible to follow the instructions from the automatic meter reading center, and the wireless slave unit transfers data to the base station through the optimum communication route. It is possible to improve the efficiency of data collection. In addition, since a communication path can be changed even when a failure occurs, a reliable and reliable communication path can be used.

The third aspect of the invention relates to wireless data transmitted from a base station via a wide-area wireless communication unit, especially when performing transmission / reception processing by recognizing the base unit in the second aspect of the invention. Is transmitted to a plurality of automatic meter-reading wireless devices in the communicable range of the near-field wireless communication unit.

  According to this, even if the wireless data from the base station cannot be received for some reason, the wireless data can be reliably received from another automatic meter-reading wireless device in the vicinity, which is safe even in the event of an emergency such as a disaster. Can work.

A fourth invention is an automatic meter reading radio system comprising the automatic meter reading radio device according to the first to third inventions, an automatic meter reading center, and a base station connected to the automatic meter reading center through a communication line. According to this, it is possible to realize a power-saving and efficient automatic meter-reading wireless system that suppresses the capital investment of the base station.

The fifth invention is a program for causing a computer to function as all or part of the means of the automatic meter-reading radio apparatus according to the first to third inventions. It is possible to realize a power-saving and efficient automatic meter reading wireless system that suppresses power consumption.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a diagram showing the automatic meter reading wireless system. The automatic meter reading center 101 and the base station 102 are connected by a wired or wireless communication line 103. Then, the base station 102 transmits the wireless data 104 from the automatic meter reading center 101 to the wireless slave devices 105 (105a, 105b, 105c, 105d, 105e).

  The wireless slave device 105 has a meter function for measuring the amount of gas used, and the measurement data is transmitted to the automatic meter reading center 101 via the base station 102 using wireless communication. In order to transmit wireless data from the wireless slave unit 105 to the base station 102, a method of transmitting to the base station 102 indirectly via a plurality of wireless slave units 105, and a method of transmitting directly to the base station 102 Details will be described later.

  In addition, each wireless slave device 105 (105a, 105b, 105c, 105d, 105e) forms a small group 106 (106a, 106b, 106c, 106d, 106e), and the small group 106 is wireless. The cordless handset 105 is mainly responsible for adjusting data communication. For example, the wireless slave devices 108 (108a, 108b, 108c, 108d, 108e) forming the small-scale group 106 do not transmit wireless data on their own, but send data to be transmitted to the wireless slave device 105 once, By relaying between slave units 105 (105a, 105b, 105c, 105d, 105e), wireless data 107 is transmitted to a specific wireless slave unit or base station 102.

  In this embodiment, the wireless slave device 105 that adjusts wireless data is referred to as a “wireless slave device that recognizes the master device and performs transmission / reception processing”, and conversely, does not adjust wireless data. The device 108 is described as “a wireless slave device that recognizes a slave device and performs transmission / reception processing”.

  Next, a block diagram of the wireless slave device 105 (or 108) is shown in FIG. The wireless slave device 105 (or 108) is configured to measure the measurement data obtained by the measurement unit 201 that measures the gas usage amount of the customer and monitors the usage state, the wide-area wireless communication unit 202 that performs long-distance wireless communication, and the wide-area wireless communication. Using a near field wireless communication unit 203 that performs medium-to-short distance type wireless communication shorter than the communication distance of the communication unit 202, and a wireless system switching unit 204 that arbitrarily switches between the wide area wireless communication unit 202 and the near field wireless communication unit 203 Send.

  In addition, the wireless slave device 105 (or 108) includes a time measuring unit 205 for measuring time, and a storage unit for holding programs and various data for executing a processing flow described below in the present embodiment. 206, a control unit 207 for controlling the entire wireless slave unit 105, a power source unit 208 for supplying driving power for the wireless slave unit, a reception level measuring unit 209 for measuring the reception level of wireless data, and a small group A wireless parent device determination unit 210 that determines whether or not the wireless child device plays a role of a parent device in 106 is provided.

  Next, a circuit diagram of the wireless slave device 105 (or 108) will be described with reference to FIG. Each function described below is connected by a bus 301. Specifically, a battery 302 corresponding to a power supply unit 208, a CPU 303 corresponding to a control unit 207 for controlling the whole, a wireless system switching unit 204, a reception level, and the like. ROM 304 for storing control programs, data, etc., such as measurement unit 209 and wireless master unit determination unit 210, RAM 305 used for program execution and data storage, measurement of gas usage of consumers and monitoring of usage status Wide-area wireless communication corresponding to the measuring device 306 corresponding to the measuring section 201, the timer 307 corresponding to the time measuring section 205 for performing various time monitoring, and the wide-area wireless communication section 202 mainly used for wireless data communication with the base station. Connected to I / F 308, a near-field wireless communication I / F 309 used mainly for wireless data communication between wireless slave units That.

  The operation of the automatic meter reading wireless system configured as described above will be described. First, the base station 102 transmits wireless data in accordance with an instruction from the automatic meter reading center 101. The wireless slave unit receives wireless data from the base station 102 from the wide area wireless communication unit 202. At this time, if the frequency band of analog television is used for wide-area wireless communication, long-distance communication can be realized, which is efficient. When there is a need for the received data to return a response to the base station 102, the wireless slave units hop the data in multiple stages using the power-saving near-field wireless communication unit 203, and the remote base The data is delivered to the station 102.

  The wireless slave units form a small group 106a, 106b, 106c, 106d, 106e with a plurality of wireless slave units in the vicinity, and base station is configured to hop data together in a group unit. To deliver.

  For example, in the small group 106e, the wireless slave device 105e plays a role like a master device, collects data of other wireless slave devices 108e belonging to the small group 106e, and collects the collected data in another small group 106e. Data is transmitted to 105d that plays the role of the parent device in 106d. Similarly, 105d serving as the master unit transfers data to 105c.

  In this way, the wireless slave devices 105a, 105b, 105c, 105d, and 105e that play the role of the parent device of each small-scale group 106a, 106b, 106c, 106d, and 106e are far away by sequentially transferring data. Data can be delivered to the base station.

  Here, a method for forming a small group will be described with reference to the flowchart of FIG. 4 using the small group 106e formed by the wireless slave device 105e and the wireless slave device 108e as a representative example.

  First, the wireless slave device 105e and the wireless slave device 108e receive wireless data from the base station 102 (S401). At the time of S401, there is no subordinate relationship corresponding to the parent-child relationship between the wireless slave device 105e and the wireless slave device 108e. Also, the hardware specification and the software specification are the same and equivalent.

  Next, the wireless slave device 105e and the wireless slave device 108e measure the reception level at the time of data reception from the base station 102 in S401 by the respective reception level measuring units 209 (S402).

  Then, the wireless slave device 105e and the wireless slave device 108e generate random delay times using the respective time measuring units 205 (S403), and enter a wait state until the generated random delay time elapses (S404). .

  Here, it is determined whether or not a predetermined data packet has been received from a wireless slave device other than itself in the vicinity area during the wait state (S405). If a predetermined data packet has not been received from a wireless slave device other than itself in the neighboring area during the wait state, it is recognized that it is necessary to assume the parent device of the small group 106e (S406). ). That is, here, it is recognized that the wireless slave device 105e plays the role of the parent device. Then, the wireless slave device 105e determined to be the parent device transmits the near-field wireless data packet from the near-field wireless communication unit 203 to the other wireless slave device 108e in the nearby region (S407).

  In S405, when a predetermined data packet is received from a wireless slave device other than itself in the nearby region during the wait state, the wireless slave device 108e that has received the nearby wireless data packet determines that it is a small group. It is recognized that it is a slave unit 106 (S409), and the near-field wireless data packet is transmitted to the wireless slave device 105e serving as the parent device that is the transmission source of the near-field wireless data packet (S410).

  Here, the wireless slave device 105e that has determined that it is the parent device in S406 receives the near-field wireless data packet in S410 from the other wireless slave device 108e that is a response to the near-field wireless data packet transmitted in S407. When receiving (S408), the wireless slave device 105e can grasp what kind of wireless slave device 108e exists in the small-scale group under its control (S411).

  In this manner, by generating a random delay time in S403 and creating a wait state for the random delay time in S404, it is possible to shift the predetermined near-field wireless data packet transmission timing between the wireless slave devices 105e and 108e. Therefore, interference can be prevented.

  In addition, the wireless slave devices 105a, 105b, 105c, 105d, and 105e that play the role of the parent device and the other wireless slave devices 108a, 108b, 108c, 108d, and 108e that operate as the slave devices by a series of processing flow from S401 to S411. And small-scale groups 106a, 106b, 106c, 106d, and 106e can be formed in a self-sustaining and distributed manner.

As another method of forming the small groups 106a, 106b, 106c, 106d, and 106e shown in FIG. 4, the reception level 503 is the highest because the near-field wireless data packet 500 includes the reception level 503. A method in which a large one plays the role of a parent machine is also conceivable. Specifically, for example, the processing after S405 is omitted, and after the random delay time of S404, for example, the wireless slave device 105e transmits the near-field wireless data packet 500 to the surroundings, and enters an arbitrary time wait state. A similar near field wireless data packet 500 is received from the wireless slave device 108e.

  The wireless slave device 108e performs the same processing as the wireless slave device 105e. By doing so, for example, the wireless slave device 105e and the surrounding wireless slave device 108e can know each other's presence and the reception level 503 of each other. A device having the highest reception level 503 can be recognized as the wireless slave device 105e that plays the role of the parent device, and the small group 106e can be formed. According to this method, the effect of stabilizing the data transfer to the base station 102 can be expected. When the reception level 503 is the same value, as described in the flow from S401 to S411, the wireless slave device 105e that has transmitted the near-field wireless data packet 500 earliest plays the role of the parent device. The small group 106e can be formed by a general method.

  When the small group 106 (106a, 106b, 106c, 106d, 106e) is formed by the series of processing flow shown in FIG. 4, each of the wireless slave devices 105e, 108e transmits and receives the near-field wireless data packet 500 shown in FIG. To do.

  The near-field wireless data packet 500 includes a near-field wireless header 501, a group ID 502, a reception level 503, device information 504, and a data field 505. The near-field wireless header 501 is a near-field wireless header of the near-field wireless data packet 500. Various parameters related to wireless data such as a transmission source, a transmission destination, and a packet type are included. Then, the wireless slave device 105e and the wireless slave device 108e can determine who transmitted from the information included in the vicinity wireless header 501 portion and what kind of response should be taken.

  The group ID 502 is for identifying the small group 106, and the reception level 503 indicates the reception level value measured in S402. In the device information 504, a value that can be used to determine and identify the wireless slave device 105e or the wireless slave device 108e is shown. In the data field 505, information obtained from the measuring unit 201 and transfer data are displayed. Etc. are included.

  Since the reception level 503 is included in the near-field wireless data packet 500, the direction of the base station is determined by checking the reception level 503 included in the data from another small group 106d, for example. Can be judged. Further, when data is transferred to the base station 102, the wireless slave devices 105a, 105b, 105c, 105d, and 105e determine the communication path to the base station by transferring the data in the direction in which the reception level 503 is large. It becomes possible.

  As described above, according to the present embodiment, data is a mechanism for hopping a plurality of wireless slave devices 105a, 105b, 105c, 105d, and 105e in multiple stages. Since it can be used, a power-saving automatic wireless meter reading system that can be operated for a long time can be provided. Further, since the wireless slave devices 105a, 105b, 105c, 105d, and 105e function as a repeater, it is possible to suppress the capital investment of the repeater.

  Further, since the wide-area wireless communication unit 202 capable of long-distance wireless communication is provided, it is possible to directly receive data from the distant base station 102. Can be suppressed.

  In addition, small groups 106a, 106b, 106c, 106d, and 106e can be formed in a self-supporting and distributed manner as necessary, so there is no need to set a parent device and a child device at the time of installation. Man-hours can be reduced. In addition, since it is not necessary to distinguish between the master unit and the slave unit, the time required for network design in the installation environment can be greatly shortened. In addition, it is possible to flexibly respond to changes in the surrounding environment due to the demolition of new structures and old buildings without manpower.

  In addition, when communication by nearby wireless communication is not successful for some reason, such as a failure, the communication method is switched by the wireless method switching unit 210, and the data is directly transferred to the base station using the wide area wireless communication unit 202. Is possible. Further, even in an installation environment where a route to the base station 102 cannot be realized by proximity wireless communication in a mountainous area or suburbs, the wide area wireless communication unit 202 can deliver data to the base station.

(Embodiment 2)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 6 is a functional block diagram of the wireless slave unit in this embodiment. Reference numeral 601 denotes a communication path correction unit that corrects a communication path based on path information received from the base station 102, and is actually held in the storage unit 206 as part of the control program.

  A communication path correction data packet 700 that is a data packet transmitted from the base station 102 will be described with reference to FIG. The communication path correction data packet 700 includes a wide area wireless header 701 of the wireless data packet 700 in wide area wireless communication, a data type 702 indicating the nature of the data, and a path managed by the automatic meter reading center. The route information data field 703 includes information.

  The operation of the automatic meter reading wireless system configured as described above will be described. First, the automatic meter reading center 101 manages past automatic meter reading information. From this management information, the communication path correction data packet 700 is transmitted to the wireless slave devices 105a, 105b, 105c, 105d, and 105e having poor communication path efficiency. The wireless slave devices 105 a, 105 b, 105 c, 105 d, and 105 e that have received the data transfer destination stored in the storage unit 206 in the next communication according to the information of the communication route correction data packet 700 by the communication route correction unit 601. Then, the data is transferred to the corrected data transfer destination using the efficient communication path by transferring the data.

  The past automatic meter reading information refers to data collected and accumulated by the automatic meter reading center 101 through wireless communication with the wireless slave devices 105a, 105b, 105c, 105d, and 105e. Based on the data, for example, it is possible to grasp information about the route by which the wireless slave device 105e has transferred the data to the base station 102. As a matter of course, since the information from the past to the present is accumulated, it is possible to determine whether the efficiency of the communication path is good or bad.

  As described above, according to the present embodiment, since the communication path correction unit 601 is provided, the communication path change can be reflected in the next communication according to the information of the communication path correction data packet 700. A communication path can be secured. Moreover, the response performance of the entire automatic meter reading radio system can be improved. Furthermore, even when some kind of failure occurs, the communication path can be temporarily changed by an instruction from the automatic meter reading center 101, so that data can be collected reliably.

(Embodiment 3)
In the present embodiment, the same components as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 8 is a functional block diagram of the wireless slave unit in this embodiment. Reference numeral 801 denotes an urgency level determination unit for determining the urgency level of the broadcast data received from the base station 102, and is actually held in the storage unit 206 as part of the control program.

  An emergency broadcast data packet 900 transmitted from the base station 102 in an emergency will be described with reference to FIG. The broadcast data packet 900 includes a wireless header 901, a data type 902 indicating what kind of data the data is, an urgency level 903 of the broadcast data packet 900, and an emergency included in the broadcast data packet 900. Time instruction information 904.

  FIG. 10 is a flowchart of processing of, for example, the wireless slave device 105e that has received the broadcast data packet 900 in an emergency.

  First, in an emergency such as the occurrence of an earthquake, the broadcast data packet 900 is transmitted from the base station 102 and received (S1001). Then, the data type 902 included in the broadcast data packet 900 is confirmed, and it is recognized that the received data is a broadcast in an emergency (S1002).

  Next, the urgency level determination unit 801 determines the urgency level 903 included in the simultaneous broadcast data packet 900 (S1003). If the urgency level is high, processing such as blocking the valve based on the instruction information 902 is performed. (S1004).

  Then, the time measuring unit 205 generates a random delay time (S1005), waits until the random delay time elapses (S1006), and indicates that the instruction information 902 of the broadcast data packet 900 has been handled. Notification is made to the neighborhood (S1007).

  Note that the broadcast data packet 900 may not be received for some reason and may be lost (S1101) in S1001 in the series of processing flows. For that, the processing flow shown in FIG. 11 is executed.

  First, data transmitted from another wireless slave device (for example, the wireless slave device 105e) in S1007 is received (S1102), and the data content is confirmed (S1103). As a result of the confirmation, if it is recognized that there is an urgent broadcast data packet 900, the same processing as that of the wireless slave device 105e that correctly received the broadcast data packet 900 is performed (S1104). If the contents of the broadcast data packet 900 have already been implemented, the received data is ignored and S1005 to S1007 are subsequently executed. Note that the processes shown in FIGS. 10 and 11 do not have a role of a parent device or a role of a child device, and all wireless slave devices perform the same process.

  As described above, according to the present embodiment, even if the communication environment deteriorates due to temporary noise or the like, and the broadcast data packet 900 from the base station 102 is missed, the other The wireless slave unit can prevent the broadcast data packet 900 from being missed by notifying the nearby area of the same contents as the broadcast data packet 900, and can operate safely even in the event of an emergency such as a disaster. An automatic meter reading radio system can be provided.

  In the automatic meter reading wireless system of the present invention, data from a base station is received using a wide area wireless communication unit, and a plurality of wireless slave units form a variable small group for data transmission to a base station, The wireless slave unit in the condition of this becomes the parent unit of this small group, collect the data of your small group, and sequentially transfer it to the parent unit of another small group with a higher reception level than yourself, Data can be delivered to the base station. Realize an energy-saving and efficient automatic meter reading wireless system by reducing the base station capital investment by changing the communication method of data transmission from the base station (downlink) and data transmission from the wireless slave unit (uplink) Can do.

Overall view of automatic meter-reading radio system in Embodiment 1 of the present invention Functional block diagram of the wireless slave device in the first embodiment of the present invention Circuit diagram of wireless slave unit in the first embodiment of the present invention Process flow diagram showing a small group forming method in Embodiment 1 of the present invention The figure which shows the data packet used by the near field radio | wireless communication in Embodiment 1 of this invention Functional block diagram of the wireless slave unit in the second embodiment of the present invention The figure which shows the routing information data packet from the base station in Embodiment 2 of this invention Functional block diagram of the wireless slave unit in the third embodiment of the present invention The figure which shows the simultaneous broadcast data packet from the base station in Embodiment 3 of this invention Processing flow diagram when receiving a simultaneous broadcast data packet in Embodiment 3 of the present invention Processing flow diagram when a broadcast data packet is missed in the third embodiment of the present invention Overview of conventional automatic meter reading wireless system

Explanation of symbols

101 Automatic meter reading center 102 Base station 105a, 105b, 105c, 105d, 105e Wireless slave unit 106a, 106b, 106c, 106d, 106e Small group 108a, 108b, 108c, 108d, 108e Role of slave unit Wireless handset 201 weighing unit 202 wide-area wireless communication unit 203 near-field wireless communication unit 205 timing unit 207 control unit

Claims (5)

It is narrower than the wireless communication range of the measuring unit for measuring the amount of gas used, the wide area wireless communication unit for transmitting and receiving wireless data between the automatic meter reading center and the base station connected via the communication line, and the wide area wireless communication unit An automatic meter-reading wireless device comprising a near-field wireless communication unit that performs wireless communication in a range,
Transmitting specific wireless data via the near-field wireless communication unit after a time arbitrarily set from the time when the wide-area wireless communication unit received wireless data from the base station,
When the specific wireless data is received from another automatic meter-reading wireless device before the arbitrarily set time elapses, it is recognized as a slave and performs transmission / reception processing,
An automatic meter-reading wireless device that recognizes a master device and performs transmission / reception processing when the specific wireless data is not received from another automatic meter-reading wireless device before the arbitrarily set time elapses. The base station, an automatic meter reading radio apparatus according to claim 1, wherein transmitting the route information for transmitting the response data. When recognizing it as a base unit and performing transmission / reception processing,
When receiving wireless data transmitted from the base station via the wide area wireless communication unit,
The automatic meter-reading wireless device according to claim 2, wherein the wireless data is transmitted to a plurality of automatic meter-reading wireless devices within a communicable range of the near-field wireless communication unit. The automatic meter-reading radio | wireless system comprised from the automatic meter-reading radio | wireless apparatus of any one of Claim 1 to 3 , an automatic meter-reading center, and the base station connected with the said automatic meter-reading center by the communication line. A program for causing a computer to function as all or part of the means of the automatic meter-reading wireless device according to any one of claims 1 to 3 .

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