CN115298715B - Communication terminal, communication system, power saving control method, and storage medium - Google Patents

Communication terminal, communication system, power saving control method, and storage medium Download PDF

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Publication number
CN115298715B
CN115298715B CN202080098817.0A CN202080098817A CN115298715B CN 115298715 B CN115298715 B CN 115298715B CN 202080098817 A CN202080098817 A CN 202080098817A CN 115298715 B CN115298715 B CN 115298715B
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communication
communication terminal
service
state
data
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CN115298715A (en
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金子直树
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A communication terminal (1) of the present invention performs an intermittent operation for repeating an active state and a sleep state, and includes: a wireless communication processing unit (101) that communicates with a 2 nd service system via a communication network configured for the 1 st service; a connected device communication processing unit (103) that communicates with a connected device; a control unit (102) that, when receiving a control instruction for a device from a 2 nd service system via a wireless communication processing unit (101), causes a connected device communication processing unit (103) to execute communication processing with the device; and a sleep time determination unit (113) that determines a sleep time, which is the duration of a sleep state, for each of the time periods based on the count result of the number of communications with the device for each of the time periods, and in the sleep state, at least the transmission function of the wireless communication processing unit (101) is stopped.

Description

Communication terminal, communication system, power saving control method, and storage medium
Technical Field
The present disclosure relates to a communication terminal connected to various meters such as gas, sewage, and the like, and devices such as various sensors for monitoring, control, data collection, and the like, a communication system provided with the communication device, a power saving control method, and a power saving control program.
Background
Data transmission and reception by wireless communication may be performed for various services such as automatic meter reading services for gas and sewage, monitoring and control services based on various sensor data, and the like. For example, a communication terminal is connected to various meters such as gas and sewage, and devices such as various sensors for monitoring, control, data collection, and the like, communicates with the devices, and transmits and receives data collected by a wireless communication and a host system, thereby providing services such as an automatic meter reading service and a monitoring control service. These communication terminals are often installed in places where it is difficult to secure a commercial power supply together with the connected devices, and therefore, it is required to drive the communication terminals with a battery as a power supply. Therefore, power saving is required in these communication terminals. As one of the power saving methods in the communication terminal, there is a method of repeating the start state and the sleep state of the communication function in each intermittent period. In communication using this method, the longer the sleep time, which is the duration of 1 sleep state, the more power consumption can be suppressed, but the response time of communication becomes longer. Accordingly, it is desirable to appropriately set the sleep time in the intermittent operation to achieve power saving while maintaining the responsiveness of communication.
Patent document 1 discloses the following technique: in a meter reading system for automatically reading a meter of a water meter, wireless devices connected to the water meter perform intermittent reception to reduce power consumption. The wireless device described in patent document 1 normally performs intermittent reception for a long intermittent period, and when a command to shorten the intermittent period is received from another wireless device that performs wireless communication with the wireless device, the intermittent period is shortened. By making the intermittent period shorter, the sleep time is also shorter. Thus, the meter reading system described in patent document 1 generally reduces the data acquisition time by reducing the sleep time while suppressing the power consumption of the wireless device when data acquisition is required at any time, such as during installation or maintenance.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 8-70488
Disclosure of Invention
Technical problem to be solved by the invention
In the meter reading system described in patent document 1, an operator operates a hand-held terminal at the time of installation or maintenance, and thereby causes other wireless devices to transmit a command for changing the intermittent cycle every time. When the technique described in patent document 1 is applied to a service of collecting data from a plurality of wireless terminals in a higher-level system, an operator needs to set an intermittent period according to the status of each communication terminal. In the future, it is expected that the number of communication terminals providing various services will increase, and it is assumed that there are a plurality of operators performing maintenance management of communication terminals, and that the time period for maintenance may be different for each operator. Further, the frequency of communication required for management of the device is sometimes different depending on the provider of the device connected to the communication terminal.
Regarding the plurality of communication terminals, the worker sets the sleep time in the intermittent operation to be a very time-consuming job in consideration of the time period for maintenance by each operator, the communication frequency for management of equipment by each provider, and the like. If the sleep time in the intermittent operation is determined in a unified manner without considering the above, there is a possibility that the sleep time is set to be short or the sleep time is set to be long in a period of time in which a quick response is desired, depending on the communication terminal, and the appropriate sleep time may not be obtained.
The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a communication terminal capable of appropriately setting a sleep time in an intermittent operation while saving the trouble of an operator.
Technical means for solving the technical problems
In order to solve the above-described problems and achieve the object, a communication terminal according to the present disclosure is a communication terminal that performs intermittent operation in which a 1 st state and a 2 nd state having less power consumption than the 1 st state are alternately repeated, including: a 1 st communication processing unit which can communicate with a 2 nd service system for providing a 2 nd service via a communication network configured for the 1 st service; and a 2 nd communication processing section capable of communicating with the connected device. The communication terminal further includes a control unit that causes the 2 nd communication processing unit to execute communication processing with the device when a control instruction for the device is received from the 2 nd service system via the 1 st communication processing unit. The communication terminal further includes a sleep time determination unit that determines a sleep time, which is a duration of the 2 nd state, for each time slot based on a result of counting the number of communications with the device for each time slot, and stops at least the transmission function of the 1 st communication processing unit in the 2 nd state.
Effects of the invention
According to the present disclosure, the following effects are achieved: the trouble of the operator can be saved and the sleep time in the intermittent operation can be appropriately set.
Drawings
Fig. 1 is a diagram showing an example of the configuration of an overall system including a communication system according to the embodiment.
Fig. 2 is a diagram showing a configuration example obtained by embodying fig. 1.
Fig. 3 is a diagram showing a configuration example of a communication terminal and a gas meter.
Fig. 4 is a diagram showing an example of setting information of the embodiment.
Fig. 5 is a diagram showing an example of setting information of the embodiment.
Fig. 6 is a flowchart showing one example of the collection step of meter reading data of the embodiment.
Fig. 7 is a diagram showing an example of intermittent operation in the communication terminal of the embodiment.
Fig. 8 is a flowchart showing one example of processing steps related to state transition in the communication terminal of the embodiment.
Fig. 9 is a diagram showing one example of the communication number information of the embodiment.
Fig. 10 is a diagram showing one example of response time information of the embodiment.
Fig. 11 is a diagram showing an example of the sleep time determination processing step of the embodiment.
Fig. 12 is a diagram showing an example of the communication frequency management table according to the embodiment.
Fig. 13 is a diagram showing one example of a response performance management table of the embodiment.
Fig. 14 is a diagram showing one example of a sleep schedule of the embodiment.
Detailed Description
The communication terminal, the communication system, the power saving control method, and the power saving control program according to the embodiments are described in detail below with reference to the drawings.
Description of the embodiments
Fig. 1 is a diagram showing an example of the configuration of an overall system including a communication system according to the embodiment. As shown in fig. 1, the overall system of the embodiment includes: a 1 st service system 10, 20, 30 that performs a process for providing a 1 st service; and communication systems 11, 21, 31 constructed corresponding to the 1 st service systems 10, 20, 30. The overall system further includes a 2 nd service system 40, 50 for performing processing for providing the 2 nd service. In addition, the system itself is also 1 communication system.
The 1 st service is, for example, an automatic meter reading service for the usage amount of electric power, gas, sewage, etc., a monitoring control service based on various sensor data, etc. For example, in the case where the 1 st service is an automatic meter reading service for the use amount of electric power, gas, sewage, or the like, the 1 st service systems 10, 20, 30 are automatic meter reading systems that manage meter data collected via the communication systems 11, 21, 31, respectively. For example, when the 1 st service is a monitoring control service, the 1 st service systems 10, 20, and 30 are monitoring control systems that perform monitoring control based on sensor data collected via the communication systems 11, 21, and 31, respectively.
The 1 st service means a service having a communication system configured for the service, and the 1 st service provided by each of the 1 st service systems 10, 20, 30 may be the same kind of service or different kinds of service. The 1 st service provided by the 1 st service system 10, 20, 30 may be a different kind of service, for example, the 1 st service provided by the 1 st service system 10 is an automatic meter reading service of the electric power usage amount, and the 1 st service provided by the 1 st service system 20 is a monitoring control service.
The communication systems 11, 21, 31 each include a plurality of communication devices. The communication systems 11, 21, 31 are communication networks configured for the 1 st service. The communication devices constituting the communication system 11 may be connected wirelessly, may be connected via dedicated lines, may be connected via power lines, or may be connected via a mobile communication network provided for communication of mobile terminals. Similarly, the communication devices constituting the communication systems 21 and 31 may be connected wirelessly, may be connected via a dedicated line, may be connected via a power line, or may be connected via a mobile communication network provided for communication of the mobile terminal.
Each of the communication systems 11, 21, 31 can be connected to a 2 nd service system 40 and a 2 nd service system 50, respectively, via a WAN (Wide Area Network: wide area network) 60. In fig. 1, each of the communication systems 11, 21, 31 is connected to the 2 nd service system 40, 50 via the WAN60, respectively, but the connection manner thereof is not limited to the example via the WAN 60.
The 2 nd service means a service having no communication system configured for the service, and the 2 nd service provided by the 2 nd service systems 40 and 50 may be the same kind of service or may be a different kind of service. The 2 nd service is, for example, an automatic meter reading service for the usage amount of electric power, gas, sewage, etc., a monitoring control service based on various sensor data, etc. Further, the 2 nd service may be a service or the like that collects or distributes data.
The communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 are communication devices not belonging to any of the communication systems 11, 21, 31, and communicate with any of the 2 nd service systems 40, 50 via any of the communication systems 11, 21, 31, thereby realizing the 2 nd service. That is, the communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 perform communication for the 2 nd service. Specifically, in the example shown in fig. 1, the communication terminals 1-1 and 1-2 communicate with either one of the 2 nd service systems 40 and 50 via the communication system 11, the communication terminals 1-10 communicate with either one of the 2 nd service systems 40 and 50 via the communication system 21, and the communication terminals 1-21 and 1-22 communicate with either one of the 2 nd service systems 40 and 50 via the communication system 31. Thus, the communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 communicate with any one of the 2 nd service systems 40, 50 via the communication systems 11, 21, 31, whereby the 2 nd service can be provided without constructing a new communication network for the 2 nd service. That is, the existing communication systems 11, 21, 31 are used as the infrastructure, whereby the 2 nd service can be efficiently realized.
In the example shown in fig. 1, 31 st service systems 10, 20, 30 are illustrated, but the number of 1 st service systems is not limited thereto. Further, in the example shown in fig. 1, 2 nd service systems 40, 50 are illustrated, but the number of 2 nd service systems is not limited thereto. In addition, a plurality of the 2 nd services may coexist in the same communication system. In addition, in the example shown in fig. 1, 5 communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 are illustrated, but the number of communication terminals is not limited thereto.
In the present embodiment, the existing communication systems 11, 21, 31 are used as the infrastructure to efficiently provide the 2 nd service, and the example is described, but the method of communication between the communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 and the corresponding 2 nd service systems 40, 50 is not limited to this. For example, the communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 may constitute dedicated communication systems for the 2 nd service together with the corresponding 2 nd service systems 40, 50, respectively. Alternatively, the communication terminals 1-1, 1-2, 1-10, 1-21, 1-22 may communicate with the corresponding 2 nd service systems 40, 50, respectively, using public lines or the like other than the communication systems 11, 21, 31.
Fig. 2 is a diagram showing a configuration example obtained by embodying fig. 1. In fig. 2, the 1 st service system 10, 20, the communication system 11, 21, and the 2 nd service system 40 in fig. 1 are embodied. In fig. 2, as a specific example, the following example is shown: the 1 st service provided by the 1 st service system 10, 20 is an automatic meter reading service for the usage amount of electric power, and the 2 nd service provided by the 2 nd service system 40 is an automatic meter reading service for the usage amount of gas. The automatic meter reading system 9 shown in fig. 2 is an example of the 1 st service system 10 shown in fig. 1, and manages the measurement result of the amount of electricity used and the like. The automatic meter reading system 9 is connected to a communication system 11 configured to automatically read the amount of electricity used. Similarly, the communication system 21 is constructed for automatic meter reading of the amount of electric power used, and is connected to an electric power automatic meter reading system, not shown, which is an example of the 1 st service system 20 shown in fig. 1.
The gas automatic meter reading system 7 is an example of the 2 nd service system 40 shown in fig. 1. In fig. 2, the communication terminals 1-1 to 1-6 are capable of communicating with the gas automatic meter reading system 7 via the communication system 11, and the communication terminals 1-10 are capable of communicating with the gas automatic meter reading system 7 via the communication system 21. The communication terminals 1-1 to 1-6 and 1-10 are often installed together with the gas meter in a place where it is difficult to secure a commercial power supply. Therefore, the communication terminals 1-1 to 1-6 are often driven by batteries, and power saving is desired. The communication terminals 1-1 to 1-6 and 1-10 realize power saving by performing intermittent operations in which the 1 st state, i.e., the Active state (Active state: active state), and the 2 nd state, i.e., the Sleep state (Sleep state) in which power consumption is small relative to the 1 st state are alternately repeated. In the present embodiment, as will be described later, the ratio of the time of the start state to the time of the sleep state in the 1-cycle of the intermittent operation is set according to the communication frequency of each time zone. Thus, an appropriate intermittent period can be set, power saving is realized, and a response speed in a time period in which a response speed is required is ensured.
Hereinafter, as shown in fig. 2, the following example is explained: the 1 st service provided by the 1 st service system 10 or 20 is an automatic meter reading service for the amount of electricity used, and the 2 nd service is an automatic meter reading service for the amount of gas used, but the contents of the 1 st service and the 2 nd service are not limited to this.
As shown in fig. 2, the communication system 11 includes smart meters (hereinafter abbreviated as SM) 2-1 to 2-13 that measure the amount of electricity used and transmit the measurement result to the electricity meter reading system 9. The communication system 11 further includes a concentrator 3-1, which is a concentration station that concentrates the measurement results received from SM2-1 to 2-6, and a concentrator 3-2, which is a concentration station that concentrates the measurement results received from SM2-7 to 2-11. The concentrators 3-1 and SM 2-1-2-6 constitute a wireless multi-hop network. The concentrators 3-2 and SM 2-7-2-11 constitute a power line multi-hop network. The concentrators 3-1, 3-2 are connected to a HES (Head End System) 6-1, which is a communication management device that manages communication in the communication System 11, via the WAN 5.
The multi-hop networks constructed by the concentrators 3-1, 3-2 and SM2-1 to 2-11 are the same as those in a general intelligent meter system, and the explanation of path construction and the like in the multi-hop networks is omitted. As with the multi-hop network in a typical smart meter system, the path within the wireless multi-hop network may be altered. Although not shown in fig. 2, 1 concentrator is shown in each of the wireless multi-hop network and the power line multi-hop network, however, in general, the wireless multi-hop network and the power line multi-hop network have a plurality of concentrators.
The SM2-12, 2-13 is connected to the HES6-1 via a mobile communication network 4 and a WAN5 provided for communication of the mobile terminal. In fig. 2, for convenience of illustration, the mobile communication network 4 and the WAN5 are also shown in a broken line indicating the communication system 11, but the mobile communication network 4 and the WAN5 are not included in the communication system 11. Furthermore, the concentrators 3-1, 3-2 may be connected via the mobile communication network 4 to a communication management device, HES6-1, which manages the communication within the communication system 11.
Thus, in the example shown in fig. 2, the communication system 11 includes the SMs 2-1 to 2-13 that communicate by 3 communication methods, but the number of communication methods of the SMs 2-1 to 2-13 in the communication system 11 is not limited to 3. For example, all of the SMs 2-1 to 2-13 in the communication system 11 may communicate by the same communication scheme. For example, SMs 2-1 through 2-13 within communication system 11 may all communicate over a wireless multi-hop network.
The communication system 21 shown in fig. 2 includes HES6-2 and SM2-21, 2-22. Although not shown in fig. 2, in the communication system 21, any 1 or more of 3 communication methods, for example, a wireless multi-hop network, a power line multi-hop network, and a mobile communication network 4 are used as in the communication system 11. Here, SM2-21, 2-22 together with a concentrator, not shown, constitute a wireless multi-hop network. HES6-2 is a communication management device that manages communications within communication system 21.
Hereinafter, each of SM2-1 to 2-13, 2-21, and 2-22 is referred to as SM2 when it is not separately shown, each of concentrators 3-1 and 3-2 is referred to as concentrator 3 when it is not separately shown, and each of HES6-1 and 6-2 is referred to as HES6 when it is not separately shown. In fig. 2, 15 SM2 are illustrated, but in reality SM2 is provided for each user of the power, so the number of SM2 is more than 15. Generally, the communication system 11 is a large-scale system including a plurality of SM2 in a wide area. SM2-1 to 2-13 are one example of a plurality of communication apparatuses constituting the communication system 11, and SM2-21, 2-22 are one example of a plurality of communication apparatuses constituting the communication system 21. Part of SM2 performs communication based on IEEE (Institute of Electrical and Electronics Engineers: institute of electrical and electronics engineers) 802.15.4g/4e, for example.
The communication devices 1-1 to 1-6 can communicate with the gas automatic meter reading system 7 via the communication system 11. Specifically, the communication terminals 1-1 to 1-6 can enter the SM network a, which is a network constituted by communication devices belonging to the communication system 11. The communication devices belonging to the communication system 11 include SM2-1 to 2-13, concentrators 3-1, 3-2 and HES6-1. Likewise, the communication devices 1-10 can communicate with the gas meter reading system 7 via the communication system 21. Specifically, the communication terminals 1 to 10 can enter the SM network B, which is a network constituted by communication devices belonging to the communication system 21. The communication terminals 1-1 to 1-6 can enter the corresponding SM network by performing network entry processing on the SM network. As the network entry process, any process can be used, and general processes can be used.
In the present embodiment, SM2-1 to 2-13 has a function as a normal smart meter, and performs network entry processing with communication terminals 1-1 to 1-6, thereby enabling communication between communication terminals 1-1 to 1-6 and gas meter reading system 7 via communication system 11. Similarly, the SM2-21, 2-22 has a function as a normal smart meter, and by performing network entry processing with the communication terminal 1-10, communication between the communication terminal 1-10 and the gas meter reading system 7 via the communication system 21 can be performed.
The communication terminals 1-1 to 1-6, 1-10 are connected to gas meters 70-1 to 70-6, 70-10, respectively, as one example of the apparatus. The gas meters 70-1 to 70-6, 70-10 meter the usage amount of the gas, respectively, and output the metering result to the communication terminals 1-1 to 1-6, 1-10. The communication devices 1-1 to 1-6 transmit the measurement result to the gas automatic meter reading system 7 via the communication system 11. The communication devices 1-10 send the metering result to the gas automatic meter reading system 7 via the communication system 21. Thus, the automatic gas meter reading system 7 can collect the usage of the gas measured by the gas meters 70-1 to 70-6, 70-10 via the communication terminals 1-1 to 1-6, 1-10. The gas meters 70-1 to 70-6, 70-10 are one example of devices connected to a communication terminal. Since the devices can utilize the network by connecting to the devices as such, the communication terminals 1-1 to 1-6, 1-10 may also be referred to as IoT terminals that implement IoT (Internet of Things: internet of things). Hereinafter, the communication terminal 1 will be described as the communication terminal 1 when it is shown without separately distinguishing each of the communication terminals 1-1 to 1-6 and 1-10, and the gas meter 70 will be described as the gas meter 70 when it is shown without separately distinguishing each of the gas meters 70-1 to 70-6 and 70-10.
In the configuration example shown in fig. 2, automatic meter reading of the amount of fuel gas used in the SM networks a and B, which are constructed for automatic meter reading of the amount of power used, can be realized. In general, SM2 is configured in a large number in a large range, and SM network a and SM network B are large-scale networks. In the configuration example shown in fig. 2, by using such a wide-area and large-scale SM network, the measurement results of the usage amount of the gas can be collected from the users of a plurality of gases in a wide range, without newly constructing a network for automatic meter reading of the usage amount of the gas.
The gas automatic meter reading system 7 periodically collects metering results of each gas meter 70 as meter reading data, for example. Accordingly, the communication device 1 periodically transmits meter reading data to the gas automatic meter reading system 7 via the communication system 11. Hereinafter, this period will be referred to as a meter reading data transmission period. The meter reading data transmission period is, for example, 1 day, but the meter reading data transmission period is not limited thereto. The gas meter reading system 7 may collect and aggregate a plurality of measurement results measured at a plurality of times, for example, a measurement result for each hour within 1 day. At this time, the meter reading data transmission period and the time resolution of the measurement result, that is, the measurement period are determined separately. The communication terminal 1 is provided with a meter reading data transmission cycle, or a meter reading data transmission cycle and a meter reading cycle. For example, the meter reading data transmission period, or the meter reading data transmission period and the metering period are set in the communication terminal 1 by notifying the communication terminal 1 of the meter reading data transmission period, or the meter reading data transmission period and the metering period from the gas automatic meter reading system 7.
In addition, unlike periodic collection of meter reading data, the gas automatic meter reading system 7 sometimes also non-periodically collects meter reading data or other data from the gas meter 70 for maintenance, monitoring, etc. In the case of non-periodic data collection, the gas meter reading system 7 instructs the gas meter 70 to transmit data via the communication systems 11 and 21 and the communication terminal 1. The period of time during which the aperiodic data collection is performed sometimes varies depending on the operator. For example, the following can be considered: some operators perform data collection for maintenance in the morning immediately after the start of business hours, and other operators perform data collection for maintenance in the late night by batch processing or the like. Furthermore, the period of time for periodic meter reading data collection may also vary from one operator to another. In addition, the frequency of data collection sometimes varies depending on the device connected to the communication terminal 1. In the present embodiment, even if such information is not known in advance, as will be described later, the number of communications per time slot is counted, and the sleep time in the intermittent operation of the communication terminal 1 is determined based on the count result, whereby the responsiveness can be improved by shortening the sleep time in the time slot with a high frequency of communications, and the power saving effect can be improved by extending the sleep time in the time slot with a low frequency of communications.
When only the meter reading data transmission period is determined and the metering period is not determined, the communication terminal 1 instructs the gas meter 70 to transmit the meter reading data at each meter reading data transmission period, thereby acquiring the meter reading data from the gas meter 70. The timing at which the communication terminal 1 acquires meter reading data from the gas meter 70 may be different from the timing at which the communication terminal 1 transmits meter reading data to the gas automatic meter reading system 7. For example, in the case where the meter reading data transmission period is 1 day, the acquisition and transmission of meter reading data in the communication terminal 1 may be set to different timings, for example, the communication terminal 1 may be set at 8:00 obtains meter reading data from gas meter 70 and at 10:00 sends the meter reading data to the automatic gas meter reading system 7.
Further, when the meter reading data transmission period and the metering period are determined, the communication terminal 1 instructs the gas meter 70 to transmit the meter reading data every metering period, thereby acquiring the meter reading data from the gas meter 70 and storing the meter reading data. Then, the communication terminal 1 transmits the stored meter data to the gas automatic meter reading system 7 every meter data transmission period. The above-described processing related to the meter reading data of the communication terminal 1 may be standard processing, but in the present embodiment, as will be described later, some of these processing may be omitted depending on the setting of the gas meter 70.
Next, a configuration example of the communication terminal 1 and the gas meter 70 will be described. Fig. 3 is a diagram showing a configuration example of the communication terminal 1 and the gas meter 70. As shown in fig. 3, the communication terminal 1 includes an antenna 100, a wireless communication processing section 101, a control section 102, a connection device communication processing section 103, an intermittent operation processing section 104, and a storage section 105. Although not shown, the communication terminal 1 may include a battery for driving the communication terminal 1.
The wireless communication processing unit 101 is a 1 st communication processing unit, and can communicate with the 2 nd service system for providing the 2 nd service, that is, the gas automatic meter reading system 7 via a communication network constructed for the 1 st service. Specifically, the wireless communication processing unit 101 performs wireless communication with the SM2 via the antenna 100. The wireless communication processing unit 101 includes a communication circuit for performing communication according to a wireless communication scheme with SM 2. Here, an example in which the communication terminal 1 performs wireless communication with the SM2 is described, but the communication between the communication terminal 1 and the SM2 may be wired communication. In the case where the communication between the communication terminal 1 and the SM2 is wired communication, the communication terminal 1 includes a communication processing unit that performs communication processing corresponding to a communication scheme of the wired communication, instead of the antenna 100 and the wireless communication processing unit 101.
The connected device communication processing unit 103 is a 2 nd communication processing unit, and can perform communication with the connected device. Communication is performed with the device. The connected device communication processing unit 103 includes a communication circuit for performing communication according to a communication scheme with the device. In fig. 3, a state in which the communication terminal 1 is connected to a gas meter 70 as one example of the apparatus is shown. Hereinafter, an example in which the communication terminal 1 is connected to the gas meter 70 will be described, but the device connected to the communication terminal 1 is not limited to the gas meter 70, and may be various meters such as a sewage, various sensors for monitoring, control, data collection, and the like. The communication between the communication terminal 1 and the device is a wired communication, but may be a wireless communication.
The connection device communication processing section 103 can correspond to a plurality of communication modes. Examples of communication methods that can be handled by the connection device communication processing unit 103 include U-Bus, N-line, a-line, H-line, and COSEM (Companion Specification for Energy Metering: electric energy meter communication standard), but the communication methods are not limited thereto. When connected to the gas meter 70, the connection device communication processing unit 103 determines a communication method of the gas meter 70, and performs communication with the gas meter 70 according to the determined communication method. Here, an example in which the connected device communication processing section 103 can correspond to a plurality of communication methods is described, but in a case where the communication methods between the communication terminal 1 and the devices are determined to be 1, the connected device communication processing section 103 may correspond to 1 communication method.
The control unit 102 controls the operation of the communication terminal 1. For example, when receiving a control instruction for a device from the gas meter reading system 7 via the wireless communication processing unit 101, the control unit 102 causes the connected device communication unit 103 to execute communication processing with the device. The intermittent operation processing section 104 controls the intermittent operation of the communication terminal 1. The operations of the control unit 102 and the intermittent operation processing unit 104 will be described later. The control unit 102 and the intermittent operation processing unit 104 are realized by, for example, a processing circuit including a processor such as a CPU (Central Processing Unit: central processing unit), an MPU (Micro Processing Unit: micro processing unit), or the like. The storage unit 105 is a memory for storing data and the like used in the processing by the control unit 102 and the intermittent operation processing unit 104. In the case where the respective functions implemented by the control unit 102 and the intermittent operation processing unit 104 are provided as software, the storage unit 105 stores programs for executing the respective functions by the control unit 102 and the intermittent operation processing unit 104, and the control unit 102 and the intermittent operation processing unit 104 are realized by executing the programs by a processor. The program may be provided by a storage medium or a communication medium. The program includes a power saving control program for performing power saving control in the communication terminal 1 of the present embodiment.
As described above, in order to save power, the communication terminal 1 performs intermittent operations of repeating the active state and the sleep state. In this embodiment, the intermittent operation period, that is, the intermittent period is made variable, so that power saving is achieved and deterioration in responsiveness is suppressed. The intermittent operation processing unit 104 includes: a state determination unit 111 for managing a state related to power saving of the communication terminal; a timer 112 that measures the duration of the Sleep state, i.e., sleep time (Sleep time); and a sleep time determination unit 113 that determines a sleep time. The states related to power saving of the communication terminal 1 include 2 states of an active state and a sleep state. The sleep state is a state in which power consumption is smaller than that of the active state. The definition of each of the sleep state and the active state may be arbitrary as long as the power consumption of the sleep state is smaller than that of the active state. In general, since the transmission process in wireless communication consumes a lot of power, at least the transmission function of the wireless communication processing unit 101 is stopped in the sleep state. In the sleep state, the operating frequencies of the control unit 102 and the intermittent operation processing unit 104, that is, the operating frequencies of the processors of the processing circuits that embody the control unit 102 and the intermittent operation processing unit 104 may be reduced more than in the active state.
Furthermore, at least one of the active state and the sleep state may be further subdivided into a plurality of states according to power consumption. The following states are set as follows: the transmission/reception function of the wireless communication processing unit 101 is stopped, the operation frequency of the control unit 102 and the intermittent operation processing unit 104 is reduced more than in the activated state, and only a part of the functions of the control unit 102 are activated. Specifically, for example, in the sleep state, the control unit 102 can execute processing for receiving an interrupt signal and processing for enabling the functions of the control unit 102 and the intermittent operation processing unit 104 when receiving an interrupt signal. The interrupt signal may be received from the gas meter 70 via the connection device communication processing unit 103, or may be generated inside the communication terminal 1. The activation state includes the following states: the wireless communication processing unit 101 can transmit and receive data, and the operation frequency of the control unit 102 and the intermittent operation processing unit 104 is higher than that in the sleep state. In addition to this state, the active state may include a state defined by a power consumption stage, such as a state in which the transmission function of the wireless communication processing unit 101 is stopped and reception by the wireless communication processing unit 101 is possible, and a state in which the transmission/reception function of the wireless communication processing unit 101 is stopped and the operation frequency of the control unit 102 is higher than that in the sleep state. In addition, as described above, the definition of the active state and the sleep state is not limited thereto, as long as the power consumption of the sleep state is lower than that of the active state.
Next, a structural example of the gas meter 70 will be described. As shown in fig. 3, the gas meter 70 includes a communication processing section 71, a control section 72, a storage section 73, and a metering section 74. In the case where the equipment connected to the communication terminal 1 is various meters such as a water supply and a water drain, the structure of the equipment is the same as that of the gas meter 70, although the measurement object of the measurement unit 74 is different. In the case where the device connected to the communication terminal 1 is a variety of sensors for monitoring, control, data collection, and the like, the device may be provided with a detection unit instead of the measurement unit 74, and the communication processing unit 71, the control unit 72, and the storage unit 73, similarly to the gas meter. The detection unit may be a detector for detecting temperature, humidity, or the like, or may be a camera for acquiring an image.
The communication processing unit 71 performs communication with the communication terminal 1. The communication processing section 71 can correspond to a plurality of communication modes. Here, an example in which the communication processing section 71 can correspond to a plurality of communication methods is described, but in a case where the communication methods between the communication terminal 1 and the device are determined to be 1, the communication processing section 71 may correspond to 1 communication method.
The control unit 72 controls the operation of the gas meter 70. Specifically, for example, when receiving a meter reading data transmission instruction, which is a measurement result of the measurement unit 74, via the communication processing unit 71, the control unit 72 transmits the measurement result of the measurement unit 74 as meter reading data to the communication terminal 1 via the communication processing unit 71. Further, in the case where the function of autonomous data notification for autonomously notifying meter reading data is provided and set to be active, the control section 72 autonomously transmits the metering result as meter reading data to the communication terminal 1 at a predetermined cycle. When the control unit 72 has a function of periodically acquiring the measurement results and storing the stored record in the storage unit 73 and the function is set to be valid, the measurement results stored in the storage unit 73 are read, and the measurement results obtained by measuring a plurality of times are collected and transmitted to the communication terminal 1 as meter reading data. The memory 73 stores setting information, which is the setting content of each function related to meter reading such as autonomous data notification and memory recording, that is, the setting content related to data collection of the gas meter 70. The stored record is sometimes also referred to as a load survey.
The metering unit 74 meters the amount of fuel gas used, and transmits the measurement result to the control unit 72. The metering unit 74 may perform metering at a constant period, or may perform metering when instructed from the control unit 72. The control unit 72 stores the measurement result in the storage unit 73, and when receiving an instruction to transmit meter reading data, reads the measurement result from the storage unit 73 and transmits the measurement result to the communication terminal 1 via the communication processing unit 71. The metering unit 74 may directly store the metering result in the storage unit 73. Further, in the case where the autonomous data notification is valid, the measurement result is read from the storage section 73 and transmitted to the communication terminal 1 via the communication processing section 71 every predetermined cycle. The control unit 72 may transmit the measurement result received from the measurement unit 74 to the communication terminal 1 via the communication processing unit 71.
The device connected to the communication terminal 1 may be provided with a detection unit instead of the measurement unit 74, and in this case, the detection result of the detection unit is transmitted from the device to the communication terminal 1 in the same manner as the measurement result.
Next, the operation of the present embodiment will be described. When the communication terminal 1 is connected to the gas meter 70, the communication system of the gas meter 70 is determined. Specifically, for example, the connection device communication processing unit 103 transmits data to the gas meter 70 by a certain communication method, and determines that the communication method of the gas meter 70 is the communication method that transmitted the data when the response returns normally. If the response is not returned normally, the connection device communication processing unit 103 can determine the communication scheme of the gas meter 70 by repeating the same operation in the other communication scheme. The method of determining the communication system of the gas meter 70 is not limited to this example.
When the determination of the communication scheme is completed, the communication terminal 1 starts communication with the gas meter 70 according to the determined communication scheme, and acquires setting information from the gas meter 70. Specifically, the control unit 102 instructs the gas meter 70 to transmit setting information related to meter reading via the connection device communication processing unit 103. When receiving the instruction via the communication processing unit 71, the control unit 72 of the gas meter 70 reads the setting information from the storage unit 73, and transmits the read setting information to the communication terminal 1 via the communication processing unit 71.
Fig. 4 and 5 are diagrams showing examples of setting information of the present embodiment. As shown in fig. 4 and 5, the setting information indicates setting contents related to each function such as the autonomous data notification and the storage record. In fig. 4 and 5, the case where each function is set to be active is denoted as "yes", and the case where each function is not present or not present but not present is denoted as "no".
Fig. 4 shows an example of setting information acquired from the gas meter 70, and the gas meter 70 has an autonomous data notification function that is set to be valid and does not have a function of storing a record. When the autonomous data notification function is set to be active, the setting value of the notification period of the autonomous notification data of the gas meter 70 is also stored in the setting information. In the example shown in fig. 4, the notification period is set to 1 day. An example of setting information acquired from the gas meter 70 is shown in fig. 5, the gas meter 70 has an autonomous data notification function and a memory recording function, and these functions are set to be effective. When the storage recording function is set to be active, the acquisition cycle, which is a cycle in which the gas meter 70 measures and stores data, is also stored in the setting information. In the example shown in fig. 5, the acquisition period is 1 hour. The gas meter 70, which has been set as shown in fig. 5, measures and stores the measurement results every 1 hour, and transmits the measurement results corresponding to 24 hours to the communication terminal 1 every 24 hours. In addition, fig. 4 and 5 are examples, and the acquisition period and the notification period are not limited thereto.
The control unit 102 refers to the setting information stored in the storage unit 105, and does not issue a transmission instruction to the gas meter 70 for periodic data collection when the autonomous data notification function of the gas meter 70 is effective. Thus, the communication terminal 1 does not need to be in an activated state for transmission of an instruction for periodic data collection, and power consumption of the communication terminal 1 can be suppressed. When the notification period set in the gas meter 70 is different from the set meter reading data transmission period, the control unit 102 of the communication terminal 1 instructs the gas meter 70 to change the notification period via the connection device communication processing unit 103.
Further, the control unit 102 refers to the setting information stored in the storage unit 105, and when the storage recording function of the gas meter 70 is effective, does not instruct transmission of the gas meter 70 for data collection for each measurement period even when the measurement period is set together with the meter reading data transmission period. Thus, the communication terminal 1 does not need to be in an activated state for transmission of an instruction for periodic data collection, and power consumption of the communication terminal 1 can be suppressed. When the acquisition cycle set in the gas meter 70 is different from the set measurement cycle, the control unit 102 of the communication terminal 1 instructs the gas meter 70 to change the acquisition cycle via the connection device communication processing unit 103.
The control unit 102 of the communication terminal 1 refers to the setting information stored in the storage unit 105, and when the autonomous data notification function of the gas meter 70 is active and the storage recording function is inactive and the metering period is set together with the meter reading data transmission period, can instruct the gas meter 70 to set the notification period of the autonomous data notification as the metering period. In this case, the control unit 102 does not instruct the gas meter 70 to collect data for each metering cycle.
Next, general operations related to collection of meter data according to the present embodiment will be described. Fig. 6 is a flowchart showing an example of the step of collecting meter reading data according to the present embodiment. The following examples are shown in fig. 6: the meter reading data transmission period and the metering period are set for the communication terminal 1, and the memory recording function of the gas meter 70 is disabled. Fig. 6 shows an example of a process normally performed in automatic meter reading, irrespective of the presence or absence of intermittent operation of the communication terminal 1. The process shown in fig. 6 is also performed in this embodiment.
As shown in fig. 6, the communication terminal 1 transmits meter data to the gas automatic meter reading system 7 every meter data transmission period (step S1). The meter reading data reach the gas automatic meter reading system 7 via the communication system 11. In fig. 6, although not shown, the meter reading data is received by the communication terminal 1 in step S2 described later, before the uppermost step S1 in fig. 6. Although not shown in fig. 6, meter reading data arrives at HES6-1 via SM2, concentrators 3 and WAN5, or via SM2, mobile communication network 4 and WAN5 in communication system 11, and is transmitted from HES6-1 to gas automatic meter reading system 7 via WAN 60. A separate description is omitted later, but communication between the communication terminal 1 and the gas meter reading system 7 is performed via the communication system 11 in this way.
The communication terminal 1 receives meter reading data from the gas meter 70 as a device every metering cycle (step S2). When the autonomous data notification function of the gas meter 70 is not effective, the communication terminal 1 transmits a transmission instruction of meter reading data to the gas meter 70 before the reception in each step S2. In the case where the autonomous data notification function is active, the transmission instruction is not required.
Further, the communication terminal 1 inquires of the gas automatic meter reading system 7 to confirm whether or not the control instruction for maintenance, monitoring, and the like of the gas meter 70 is provided from the gas automatic meter reading system 7 (step S3). When the control instruction is received, the gas automatic meter reading system 7 transmits the control instruction to the communication terminal 1 (step S4). In addition, although an example of the inquiry to the gas meter reading system 7 is shown in steps S3 and S4, the control instruction from the gas meter reading system 7 may be held in the communication system 11 instead, and the communication system 11 receives the inquiry from the communication terminal 1, and the communication system 11 transmits the control instruction corresponding to the inquiry. For example, the SM2 connected to the communication terminal 1 may hold a control instruction, and if the SM2 accepts an inquiry from the communication terminal 1, the control instruction is transmitted to the communication terminal 1. The control instruction may be, for example, an instruction to acquire meter reading data or other data from the gas meter 70, but the content of the control instruction is not limited thereto. Here, when maintenance, monitoring, or the like of the gas meter 70 is required, the gas automatic meter reading system 7 holds a control instruction corresponding to the gas meter 70, and if an inquiry is made from the communication terminal 1 connected to the gas meter 70, the held control instruction is transmitted to the communication terminal 1. Accordingly, the communication terminal 1 can set the wireless communication processing unit 101 to an active state to receive a control instruction from the gas automatic meter reading system 7 within a certain time after the inquiry is sent. In fig. 6, even if a query is received from the communication terminal 1, the gas automatic meter reading system 7 does not transmit a control instruction if there is no control instruction. When a control instruction is not received from the gas meter reading system 7 even after a certain time has elapsed from the inquiry, the communication terminal 1 determines that there is no control instruction. Hereinafter, the control instruction from the fuel gas meter reading system 7 will also be referred to as a control instruction from the system.
When receiving the control instruction from the gas automatic meter reading system 7, the communication terminal 1 transmits a control request conforming to the control instruction to the gas meter 70 (step S5). Upon receiving the control request, the gas meter 70 transmits a control response to the communication terminal 1 (step S6). Upon receiving the control response from the gas meter 70, the communication terminal 1 transmits the control result to the gas automatic meter reading system 7 based on the control response (step S7).
Specifically, for example, in the case where the control instruction received by the communication terminal 1 from the gas automatic meter reading system 7 is an instruction to acquire meter reading data from the gas meter 70, the communication terminal 1 transmits a control request requesting acquisition of meter reading data to the gas meter 70. Upon receiving the control request, the gas meter 70 transmits meter reading data as a control response to the communication terminal 1. The communication terminal 1 transmits meter reading data as a control result to the gas automatic meter reading system 7. When the control instruction received by the communication terminal 1 from the gas automatic meter reading system 7 is an instruction requesting a change in the setting of the gas meter 70, the communication terminal 1 transmits a control request requesting a change in the setting to the gas meter 70. Upon receiving the control request, the gas meter 70 changes the setting, and upon completion of the change of the setting, a control response indicating that the setting was changed is transmitted to the communication terminal 1. The communication terminal 1 transmits information indicating that the setting has been changed as a control result to the gas automatic meter reading system 7.
As described above, the periodic collection of meter reading data and the aperiodic control instruction from the gas automatic meter reading system 7 are generally performed. On the other hand, the communication terminal 1 performs the intermittent operation as described above. In order to perform the intermittent operation so that the process shown in fig. 6 is performed without a large delay, it is desirable to appropriately set the intermittent period.
Fig. 7 is a diagram showing an example of intermittent operation in the communication terminal 1 of the present embodiment. As shown in fig. 7, the communication terminal 1 alternately repeats an active state and a sleep state. In the present embodiment, the duration of the 1-time active state, that is, the start time is not fixed, a task to be executed in the 1-time active state is executed, and when the task is ended, the state is shifted from the active state to the sleep state. The task performed in the 1-time activation state is, for example, a predetermined process. Thus, the start-up time varies according to the processing time of the task. In addition, the duration of the activation state is not limited to this example, and may be fixedly determined, or may be determined in any manner. On the other hand, the sleep time is determined for each time slot as described later. Further, as shown in fig. 7, even if the communication terminal 1 is in the sleep state, if an interrupt signal is received, the communication terminal transitions to the active state. When the function of autonomous data notification is valid, the gas meter 70 transmits meter reading data as an interrupt signal in each notification period. Thus, when the function of autonomous data notification is effective, the communication terminal 1 can shorten the time of the active state without transmitting a data transmission instruction to the gas meter 70 in order to acquire the regular meter reading data from the gas meter 70.
As shown in fig. 6, the processing performed in the active state by the communication terminal 1 includes processing based on a control instruction received from the gas automatic meter reading system 7, processing of acquiring meter reading data from the gas meter 70, and processing of transmitting meter reading data to the gas automatic meter reading system 7. The communication terminal 1 performs tasks corresponding to 1 category of processing among these categories of processing within 1 startup time. In addition, the communication terminal 1 may perform processing of a category other than the above-described category, and in this case, similarly, the task corresponding to 1 category of processing among the plurality of categories of processing is performed within 1 startup time. The number of tasks to be executed in 1 startup time may be 1 or more. The task generated by the control unit 102 is stored in the storage unit 105 as task information. When the state is changed from the sleep state to the active state, the control unit 102 executes the oldest task among the tasks indicated by the task information stored in the storage unit 105. The executed task is deleted.
For example, the control unit 102 stores a task of transmitting meter data to the gas automatic meter reading system 7 in each meter data transmission cycle in the storage unit 105. The control unit 102 also stores, in the storage unit 105, a task of acquiring meter reading data from the gas meter 70 for each metering cycle when the metering cycle is set and for each meter reading data transmission cycle when the metering cycle is not set. When the function of autonomous data notification of the gas meter 70 is effective, the meter reading data is received by the interrupt signal as described above without generating a task of acquiring meter reading data from the gas meter 70. When the control instruction is issued, the control unit 102 stores a task of transmitting meter reading data to the gas automatic meter reading system 7 in the storage unit 105.
In this way, when the setting information acquired from the gas meter 70 does not include information indicating that the setting indicating that the gas meter 70 autonomously performs the periodic data transmission is valid, the control unit 102 includes processing for periodically requesting the gas meter 70 for data transmission in the task information. On the other hand, when the setting information acquired from the gas meter 70 includes information indicating that the setting indicating that the gas meter 70 autonomously performs the periodic data transmission is valid, the control unit 102 does not include processing for periodically requesting the gas meter 70 for data transmission in the task information.
When the communication terminal 1 determines the 1 st cycle (metering cycle) in which data is acquired from the gas meter 70 and the 2 nd cycle (meter reading data transmission cycle) in which data is transmitted to the 2 nd service system, the control unit 102 includes processing for requesting transmission of data to the gas meter 70 in the 1 st cycle (metering cycle) in the task information when the setting information acquired from the gas meter 70 does not include information indicating that the function in which the gas meter 70 periodically acquires and holds data is valid. When the setting information acquired from the gas meter 70 includes information indicating that the function of periodically acquiring and holding data by the gas meter 70 is valid, the control unit 102 does not include the process of requesting transmission of data to the gas meter 70 in the 1 st cycle (measurement cycle) in the task information.
Next, a state transition between an active state and a sleep state in the communication terminal 1 of the present embodiment is exemplified. In the present embodiment, the communication terminal 1 records information for a sleep time determination process to be described later, such as the number of communications per time zone and the round trip time (round trip delay time) between devices, in an active state. The number of communications per time period is recorded in the storage section 105 as the number of communications information, and the round trip time is recorded in the storage section 105 as the response time information. Here, the time period refers to each time period when 1 day is divided into a plurality of times, for example, each time period of 3 hours such as 0:00 to 02:59,3:00 to 5:59, …,21:00 to 23:59. The time period is not limited to every 3 hours, and the length of the time period may be shorter than 3 hours or longer than 3 hours.
Fig. 8 is a flowchart showing one example of processing steps related to state transition in the communication terminal 1 of the present embodiment. In fig. 8, the processing is set to start when the communication terminal 1 is in the sleep state. As shown in fig. 8, the communication terminal 1 determines whether or not the sleep time has elapsed (step S11). Specifically, the timer 112 of the intermittent operation processing unit 104 measures the elapsed time from the time when the active state is shifted to the sleep state, and if the elapsed time becomes the set sleep time, the state determination unit 111 is notified that the sleep time has elapsed. Thus, the state determination unit 111 determines that the sleep time has elapsed. In the present embodiment, as will be described later, the sleep time is determined by the sleep time determination process. Before the sleep time determination process is performed, an initial value is set for the sleep time.
If it is determined that the sleep time has elapsed (yes in step S11), the communication terminal 1 shifts to the active state (step S12). Specifically, when the sleep time is determined to have elapsed, the state determination unit 111 changes the operating frequency of the control unit 102 or sets the wireless communication processing unit 101 to a state capable of transmitting and receiving so as to be in an active state. In the case where the active state is subdivided into a plurality of states, for example, in this stage, the limitation of the operation of the control unit 102 may be released only, and the wireless communication processing unit 101 may not be configured to be capable of transmitting and receiving.
Next, when the communication terminal transitions to the active state, the communication terminal 1 determines whether or not the data collection timing is set (step S13). Specifically, the control unit 102 checks the tasks stored in the storage unit 105, and determines whether or not the oldest task among the stored tasks is a task for data collection from the gas meter 70. When the data collection timing is determined (yes in step S13), the communication terminal 1 adds 1 to the number of communications in the corresponding time zone (step S14). Specifically, the control unit 102 notifies the state determination unit 111 of the data collection timing, and the state determination unit 111 increases the number of communications for the corresponding time period by 1 from the number of communications information stored in the storage unit 105.
Fig. 9 is a diagram showing an example of the communication number information of the present embodiment. As shown in fig. 9, the communication number information contains the communication number of each time period for a plurality of days. In fig. 9, an example in which the number of communications for 10 days is included in the number of communications information is shown. For example, the communication number information includes an actual value of the communication number per time period of the last 10 days. In step S14 shown in fig. 8, the number of communications in the corresponding time period on the day of the processing is updated. For example, 10 on 10 days of 2 months: 00 in the case of performing the above step S14, 9 of the communication number information shown in fig. 9 is set to 2 months and 10 days: 00-11:59 plus 1. Here, in the sleep time determination processing described later, since the average value of the number of communications for 10 days is used for each time zone, the number of communications information is also recorded for 10 days, but 10 days is an example, and the number of days to be recorded as the number of communications information may be determined according to the content of the statistical processing in the sleep time determination processing. In the sleep time determination processing described later, the average value of the number of communications for a plurality of days is calculated for each time zone, but the present invention is not limited to this, and the average value of the number of communications for 10 days may be calculated for the first time, and then the average value for each time zone and the latest value, which is the number of communications for each time zone on the day, may be stored in the number of communications information, and the average value may be obtained by weighting and adding the average value and the latest value. Thus, the content of the communication number information can be set appropriately according to the processing performed in the sleep time determination processing described later. In fig. 9, the number of times of communication in each time zone is recorded for each communication scheme.
Returning to the explanation of fig. 8, the communication terminal 1 performs the communication process with the gas meter 70, which is the connection device, after step S14 (step S15). Specifically, the control unit 102 transmits a control request to the gas meter 70 via the connection device communication processing unit 103, and receives a response to the control request from the gas meter 70 via the connection device communication processing unit 103. In the case where the control request is a meter reading data acquisition request, the meter reading data is included in the response. In the case where the control request is based on a control instruction from the system, the response is a control result corresponding to the control instruction.
The communication terminal 1 measures the round trip time, which is the time from the transmission of the control request to the reception of the response in the communication process of step S15, and stores the round trip time in the storage 105 (step S16). Specifically, the control unit 102 or the state determination unit 111 measures the round trip time, and stores the round trip time as response time information in the storage unit 105. Fig. 10 is a diagram showing one example of response time information of the present embodiment. As shown in fig. 10, the storage unit 105 records a predetermined number of round trip times as response time information. In response time information, new data is added to the round trip time for each measurement, and the corresponding old data is deleted from the response time information. The round trip time may be different depending on the communication scheme, and thus, as shown in fig. 10, the round trip time is recorded for each communication scheme. The round trip time recorded in the response time information is used to calculate an average value in a statistical process in a decision process of the sleep time described later, and therefore, the number of round trip times recorded in the response time information is determined from the statistical process. Similarly to the above-described number of communications, the average value may be held, and the latest value may be added to the average value by weighting in the sleep time determination process.
Returning to the explanation of fig. 8, after step S16, the communication terminal 1 records or notifies the communication result (step S17). The communication result is other control results such as meter reading data obtained from the gas meter 70, a response indicating completion of setting when setting is instructed, and the like. For example, when the task being executed is acquisition of meter reading data for each metering cycle, the control unit 102 stores the meter reading data in the storage unit 105, records the communication result, and notifies the end of the task to the state determination unit 111. For example, when the task being executed is based on a control instruction from the system, the control unit 102 notifies the gas automatic meter reading system 7 of meter reading data using the communication result obtained from the gas meter 70 as a control result, and notifies the state determination unit 111 of the end of the task.
After step S17, the communication terminal 1 transitions to the sleep state (step S18). In detail, when the end of the task is notified from the control section 102, the state determination section 111 causes the wireless communication processing section 101 to shift to the power saving state, and causes the control section 102 and the intermittent operation processing section 104 to shift to the power saving state. For example, the state determination unit 111 performs processing such as stopping the transmission/reception function of the wireless communication processing unit 101, stopping the power supply to the communication circuit of the wireless communication processing unit 101, reducing the operating frequency of the control unit 102 and the intermittent operation processing unit 104, or limiting the functions of the control unit 102 and the intermittent operation processing unit 104.
When the communication terminal transitions to the sleep state, the communication terminal 1 starts measurement of the sleep time by the timer 112, and repeats the processing from step S11. In step S11, if the sleep time has not elapsed (no in step S11), the device enters a sleep state until the sleep time has elapsed. In the flowchart shown in fig. 8, the process when the interrupt signal is received is not described, and as shown in fig. 7, even in the sleep state, the communication terminal 1 is shifted to the active state when the interrupt signal is received.
If it is determined in step S13 that the data collection timing is not the data collection timing (no in step S13), the communication terminal 1 determines whether or not the data transmission timing is the timing for the system, that is, the gas meter reading system 7 (step S19). Specifically, the control unit 102 checks the tasks stored in the storage unit 105, and determines whether or not the oldest task among the stored tasks is a task for transmitting meter reading data for the gas automatic meter reading system 7. When the timing of data transmission to the system is set (yes in step S19), the communication terminal 1 transmits data to the system, that is, transmits meter reading data to the gas automatic meter reading system 7 (step S20), and advances the process to step S18. When the active state is subdivided into a plurality of states and the transmission function of the wireless communication processing unit 101 is stopped at the time when step S19 is performed, the communication terminal 1 sets the transmission function of the wireless communication processing unit 101 to be active and then transmits data in step S20.
If the timing of data transmission to the system is not set (no in step S19), the communication terminal 1 determines whether or not the timing is a timing of inquiry to the system (step S21). Specifically, the control unit 102 checks the tasks stored in the storage unit 105, and determines whether or not the oldest task among the stored tasks is a task to be inquired about the system. If the inquiry timing is for the system (yes in step S21), the communication terminal 1 performs an inquiry to the system (step S22). When the activated state is subdivided into a plurality of states and the transmission function of the wireless communication processing unit 101 is stopped at the time when step S21 is performed, the communication terminal 1 makes an inquiry after the transmission/reception function of the wireless communication processing unit 101 is activated in step S22.
After querying the system, the communication terminal 1 determines whether or not there is a control instruction from the system (step S23). Specifically, the control unit 102 determines whether or not a control instruction is received from the gas automatic meter reading system 7 via the wireless communication processing unit 101. When the control instruction is not received from the gas meter reading system 7 within a certain time after the inquiry is sent, the control unit 102 determines that there is no control instruction. If there is a control instruction (yes in step S23), the processing from step S14 is executed in order to perform the processing based on the control instruction. When the processing after step S14 is performed through step S23, the communication terminal 1 performs processing such as collecting meter reading data or other data from the gas meter 70 or performing setting for the gas meter 70 based on the control instruction.
In the case where there is no control instruction from the system (no in step S23), the communication terminal 1 advances the process to step S18. Further, in the case where the inquiry timing to the system is not made (no in step S21), the communication terminal 1 advances the process to step S18.
As described above, when the task performed during the 1-time startup period ends, the state determination unit 111 transitions the communication terminal 1 from the active state to the sleep state. In addition, when there is no task to be executed, the communication terminal 1 performs only confirmation of the task and transitions to the sleep state. This confirmed process is also one example of predetermined processes that should be performed in the 1-time activation state. Thus, the start-up time can be controlled to the time required for the process. Since the response time differs for each gas meter 70, if the startup time is determined in advance, since the round trip time differs for each gas meter 70, it is necessary to set a startup time longer than the maximum round trip time. In contrast, in the present embodiment, when data is collected from the gas meter 70, the data is quickly transferred to the sleep state when the collection of data is completed, and therefore, when the round trip time is short, the start time can be shortened as compared with the case where the start time is determined in advance. Thus, in the present embodiment, it can be said that the start time is determined based on the round trip time, that is, the response performance.
Next, the sleep time determination processing according to the present embodiment will be described. As described above, the startup time is determined according to the processing time, but the sleep time is determined according to the count result of the number of communications per time period, or the like. The sleep time determination process is performed once a day, for example, but the timing of the sleep time determination process is not limited to this, and may be performed once a few days, for example.
Fig. 11 is a diagram showing an example of the sleep time determination processing procedure of the present embodiment. The communication terminal 1 first updates the table (step S31). Specifically, the sleep time determination unit 113 updates the communication frequency management table and the response performance management table stored in the storage unit 105 based on the communication number information and the response time information stored in the storage unit 105.
Fig. 12 is a diagram showing an example of the communication frequency management table according to the present embodiment. The communication frequency management table includes an actual value of the number of times of communication in each time zone and intermittent period division in each time zone for each communication system. The actual value of the number of communications is based on the count result of the number of communications per time zone, and specifically is a value obtained by statistically processing the number of communications per time zone stored in the number of communications information. For example, the actual value of the number of communications is an average of the number of communications between 10 days per time period. The sleep time determining unit 113 performs statistical processing using the communication frequency information, thereby calculating an actual value of the communication frequency in each time slot and storing the actual value in the communication frequency management table. Intermittent period division is a division representing sleep time determined by the number of communications. For example, correspondence between the number of communications and the intermittent period division is predetermined, such as intermittent period division D in the case where the number of communications is 1 time, intermittent period division C in the case where the number of communications is 1 time or more and less than 5 times, intermittent period division B in the case where the number of communications is 5 times or more and less than 10 times, and intermittent period division a in the case where the number of communications is 10 times or more. The sleep time determination unit 113 determines intermittent period division corresponding to the actual value of the number of communications in each time slot based on the correspondence, and stores the intermittent period division in the communication frequency management table. Here, the intermittent period division defines 4 divisions a to D, and division D is set as the division having the longest sleep time, and the corresponding sleep time becomes longer in the order in which the letters A, B, C, D advance.
In step S31, the sleep time determination unit 113 calculates an actual value of the round trip time for each communication scheme and stores the calculated value in the storage unit 105. The actual value of the round trip time for example comprises the average response performance. The sleep time determining unit 113 performs statistical processing using the response time information, thereby calculating an average response performance and storing the average response performance in the storage unit 105.
Returning to the description of fig. 11. After step S31, the communication terminal 1 acquires a corresponding intermittent period division from the communication frequency management table (step S32). Specifically, the sleep time determining unit 113 selects a processing target time slot, and acquires intermittent period division of the time slot selected from the communication frequency management table.
Next, the communication terminal 1 acquires a comparable intermittent period inclination division from the response performance management table, and determines an intermittent period division using the intermittent period inclination division (step S33). Specifically, the sleep time determination unit 113 acquires the corresponding intermittent period inclination division from the response performance management table based on the actual value of the round trip time, and determines the intermittent period division based on the intermittent period inclination division and the intermittent period division acquired in step S32.
Fig. 13 is a diagram showing an example of the response performance management table of the present embodiment. As shown in fig. 13, the response performance management table contains average response performance and intermittent period inclination division. The example shown in fig. 13 shows the following case: the intermittent period is divided into +2 when the average response performance of the actual value of the round trip time is 5000ms or more, and into +1 when the average response performance of the actual value of the round trip time is 500ms or more and less than 5000 ms. Further, when the average response performance is less than 500ms, which is a range not included in the response performance management table, that is, the actual value of the round trip time, the intermittent period is divided into 0. In addition, although an example in which the intermittent period inclination division is determined based on the average response performance is shown here, the intermittent period inclination division may be determined further based on the round trip time at the time of final communication.
The sleep time determination unit 113 acquires a corresponding intermittent period inclination division from the response performance management table based on the actual value of the round trip time, and changes the intermittent period division acquired in step S32 to 1 division in which the sleep time is long when the intermittent period inclination division acquired in step S33 is, for example, +1. For example, if the intermittent period acquired in step S32 is divided into a and the intermittent period is obliquely divided into +1, the sleep time determining unit 113 determines the intermittent period division as B. For example, if the intermittent period acquired in step S32 is divided into a and the intermittent period is obliquely divided into +3, the sleep time determining unit 113 determines the intermittent period division as D.
Returning to the description of fig. 11. After step S33, the sleep time determination unit 113 sets a sleep time corresponding to the determined intermittent period division based on the sleep time table (step S34). In detail, for example, each period sleep time information indicating the sleep time of each period is held in the storage section 105, and the value of the sleep time of the corresponding period within each period sleep time information is updated. After step S34, the sleep time determining unit 113 determines whether or not the process is completed for all the time slots (step S35), and if the process is completed for all the time slots (yes in step S35), the sleep time determining process is completed. When there is a period of time in which no processing is performed (no in step S35), the sleep time determining unit 113 changes the period of time to be processed, and repeats the processing from step S32.
The sleep time for each period is determined using the above process. The sleep time determination unit 113 sets the expiration time of the timer 112 to the corresponding sleep time for each time slot based on the sleep time information for each time slot. Fig. 14 is a diagram showing one example of the sleep schedule of the present embodiment. As shown in fig. 14, the sleep schedule includes sleep times divided every intermittent period. As shown in FIG. 14, intermittent period divisions A-D correspond to sleep times T, respectively 1 ～T 4 。T 1 ＜T 2 ＜T 3 ＜T 4 . For example, in automatic meter reading of gas and sewer, the period for the communication terminal 1 to acquire meter reading data from the equipment is often about 1 hour. The sleep time is generally shorter than the period in which the communication terminal 1 acquires meter reading data, for example, about several tens of seconds to several minutes, but is not limited thereto. Further, the start-up time is a time to execute 1 task, and thus, for example, several ms to several s.
In addition, the following examples are explained in the above examples: the communication terminal 1 makes an inquiry to receive a control instruction from the gas automatic meter reading system 7, but may receive a control instruction from the gas automatic meter reading system 7 without the inquiry. In this case, the communication terminal 1 does not know when to receive the control instruction from the gas meter reading system 7, and therefore the reception function of the wireless communication processing unit 101 can be made effective even in the sleep state. Alternatively, the intermittent period of the reception function of the wireless communication processing unit 101 may be determined separately from the start-up time and the sleep time, for example, the reception function of the wireless communication processing unit 101 may be set to an active state during a fixed start-up time and set to a sleep state during a fixed sleep time. In this case, if there is no response after the control instruction is transmitted to the communication terminal 1, the gas automatic meter reading system 7 repeats the retransmission of the control instruction for a longer period than the sleep state.
In the example described above, the intermittent period gradient division is determined based on the response performance, and the intermittent period gradient division is determined based on the intermittent period gradient division, but the intermittent period gradient division based on the response performance may not be reflected. That is, the intermittent period division determined based on the number of communications may be used as the determined intermittent period division. In the above-described example, the communication terminal 1 determines the sleep time based on the number of times of communication with the gas meter 70 as the device, but is not limited thereto, and may count the number of times of communication with the gas meter reading system 7, that is, the number of times of communication with the SM2, for each time zone, and determine the sleep time for each time zone based on the number of times of communication with the gas meter reading system 7. When the period of collection is decided, the number of communications for periodic collection of meter reading data between the communication terminal 1 and the gas automatic meter reading system 7 is decided. Therefore, even if the above-described technique of the number of communications is not performed, the communication terminal 1 can grasp the timing of the periodic collection, and thus can calculate the number of communications for each corresponding period. As described above, the connection device communication processing section 103 is in a state where reception is always possible so that the communication terminal 1 can receive an interrupt signal from the gas meter 70 as a device.
The communication terminal 1 determines the sleep time for each communication scheme, and thus, even when the communication scheme is changed by a device connected to the communication terminal 1 or when the communication scheme is changed by a device connected to the communication terminal 1, the sleep time can be appropriately set according to the communication scheme. For example, when the communication terminal 1 used by a certain user is used by another user, the device connected to the communication terminal 1 is changed. Further, a case where the communication terminal 1 can be connected to a plurality of devices having different communication schemes is also considered. In this case, the sleep time can be determined for each communication system, and thus the sleep time can be appropriately set according to the communication system.
In addition, in the case where the communication terminal 1 is driven by a battery, power saving is particularly important. When the communication terminal 1 is driven by a battery, the communication terminal may shift to a delay mode in which the sleep time is prolonged when the remaining battery power is equal to or less than a threshold value. For example, the sleep time in the delay mode may be set to be longer than the sleep time corresponding to the intermittent period division D, and in the extension mode, a value obtained by multiplying the sleep time determined in the determination processing of the sleep time by a predetermined coefficient may be used as the sleep time. The coefficient is a value greater than 1. Further, the coefficient may be determined stepwise according to the remaining amount of the battery. The coefficient may be determined stepwise, for example, the coefficient is set to 1.5 when the remaining battery level is equal to or less than the 1 st threshold, and the coefficient is set to 2.0 when the remaining battery level is equal to or less than the 2 nd threshold, which is smaller than the 1 st threshold. Thus, the sleep time determination unit 113 may determine the sleep time based on the remaining battery power, in addition to the count result of the number of communications per time period, or the count result of the number of communications per time period and the response performance.
As described above, in the present embodiment, since the sleep time is determined based on the count result of the number of communications per time zone, the responsiveness can be improved by shortening the sleep time in a time zone where the frequency of communications is high due to maintenance, monitoring, or the like, and the power saving effect can be improved by extending the sleep time in a time zone where the frequency of communications is low. In addition, when a device having poor response performance and long round trip time is connected, the response is deteriorated, and thus, the effect of shortening the sleep time is also small. In the present embodiment, the intermittent period division is changed based on the response performance, and the power saving effect can be improved by extending the sleep time when the effect of shortening the sleep time is small. That is, in addition to the count result of the number of communications per time period, the sleep time may be determined based on the round trip time with the device, thereby improving the power saving effect. Further, since the sleep time is prolonged when the remaining battery level is equal to or less than the threshold value, the power consumption can be suppressed when the remaining battery level is reduced, and the time until the communication terminal 1 stops the function due to the remaining battery level being exhausted can be prolonged.
The configuration shown in the above-described embodiment is an example, and other known techniques may be combined, and the embodiments may be combined with each other, and a part of the configuration may be omitted or changed without departing from the gist of the present invention.
Description of the reference numerals
1. 1-6, 1-10, 1-21, 1-22 communication terminal
2、2-1～2-13、2-21、2-22 SM
7. Automatic meter reading system for fuel gas
10. 20, 30 1 st service system
11. 21, 31 communication system
40. 50 nd service system
70. 70-1 to 70-6, 70-10 gas meter
71. Communication processing unit
72. 102 control part
73. 105 storage part
74. Metering part
100. Antenna
101. Radio communication processing unit
103. Connection device communication processing unit
104. Intermittent operation processing unit
111. Status determination unit
112. Time-piece
113. And a sleep time determination unit.

Claims (11)

1. A communication terminal, which is capable of providing a communication signal,
an intermittent operation is performed in which a 1 st state and a 2 nd state having less power consumption than the 1 st state are alternately repeated, the communication terminal including:
a 1 st communication processing unit which can communicate with a 2 nd service system for providing a 2 nd service via a communication network configured for the 1 st service;
a 2 nd communication processing section capable of communicating with the connected device;
a control unit that causes the 2 nd communication processing unit to execute communication processing with the device when a control instruction for the device is received from the 2 nd service system via the 1 st communication processing unit; and
A sleep time determination unit that determines a sleep time, which is a duration of the 2 nd state, for each of the time periods based on a count result of the number of communications with the device for each of the time periods,
the 2 nd communication processing section acquires data from the device in the 1 st period,
the 1 st communication processing section transmits the data to the 2 nd service system in a 2 nd period,
the control indication comprises an indication of an aperiodic transmission,
in the 2 nd state, at least the transmission function of the 1 st communication processing unit is stopped.
2. The communication terminal as claimed in claim 1, wherein,
the sleep time determination unit also determines the sleep time based on a round trip delay time with the device.
3. A communication terminal as claimed in claim 1 or 2, characterized in that,
the communication terminal is driven by a battery,
the sleep time determination unit also determines the sleep time based on the remaining battery power.
4. A communication terminal as claimed in any one of claims 1 to 3, characterized in that,
the sleep time determination unit determines the sleep time for each communication scheme with the device.
5. The communication terminal as claimed in any one of claims 1 to 4, characterized in that,
comprises a storage unit for storing task information indicating a process to be executed in the 1 st state,
when the device is connected, the 1 st communication processing unit acquires setting information indicating the content of the setting related to the data collection of the device, and transmits the setting information to the control unit,
the control unit includes processing for periodically requesting transmission of data to the device in the task information when the setting information does not include information indicating that the setting information indicates that the device autonomously performs periodic data transmission is valid, and the control unit does not include processing for periodically requesting transmission of data to the device in the task information when the setting information includes information indicating that the setting information indicates that the device autonomously performs periodic data transmission is valid.
6. The communication terminal as claimed in claim 5, wherein,
the 2 nd period is longer than the 1 st period,
the control unit includes processing for requesting transmission of data to the device in the 1 st cycle in the task information when information indicating that the function of periodically acquiring and holding data is valid is not included in the setting information, and the control unit does not include processing for requesting transmission of data to the device in the 1 st cycle in the task information when information indicating that the function of periodically acquiring and holding data is valid is included in the setting information.
7. The communication terminal as claimed in any one of claims 1 to 6, characterized in that,
the 1 st service is an automatic meter reading service for the use amount of electric power.
8. The communication terminal as claimed in claim 7, wherein,
the 2 nd service is an automatic meter reading service of the using amount of the fuel gas, an automatic meter reading service of the using amount of tap water or a monitoring control service based on sensor data.
9. A communication system, comprising:
a communication network configured for the 1 st service;
a 2 nd service system for providing a 2 nd service; and
a plurality of communication terminals which perform intermittent operations in which a 1 st state and a 2 nd state having less power consumption than the 1 st state are alternately repeated and which are capable of performing communication for providing the 2 nd service with the 2 nd service system via the communication network, the communication system being characterized in that,
the plurality of communication terminals respectively include:
a 1 st communication processing unit configured to be capable of communicating with the 2 nd service system via the communication network;
a 2 nd communication processing section capable of communicating with the connected device;
a control unit that causes the 2 nd communication processing unit to execute communication processing with the device when a control instruction for the device is received from the 2 nd service system via the 1 st communication processing unit; and
A sleep time determination unit that determines a sleep time, which is a duration of the 2 nd state, for each of the time periods based on a count result of the number of communications with the device for each of the time periods,
the 2 nd communication processing section acquires data from the device in the 1 st period,
the 1 st communication processing section transmits the data to the 2 nd service system in a 2 nd period,
the control indication comprises an indication of an aperiodic transmission,
in the 2 nd state, at least the transmission function of the 1 st communication processing unit is stopped.
10. A power saving control method in a communication terminal,
the communication terminal performs intermittent operation of alternately repeating a 1 st state and a 2 nd state having less power consumption than the 1 st state, including: a 1 st communication processing unit which can communicate with a 2 nd service system for providing a 2 nd service via a communication network configured for the 1 st service; and a 2 nd communication processing section capable of communicating with the connected device, the power saving control method characterized in that,
the communication terminal includes:
A 1 st step of causing the 2 nd communication processing section to execute a communication process with the device when a control instruction for the device is received from the 2 nd service system via the 1 st communication processing section;
a step 2 of determining a sleep time, which is a duration of the 2 nd state, for each of the time periods based on a count result of the number of communications with the device for each of the time periods;
a 3 rd step of acquiring data from the device in the 1 st cycle; and
a 4 th step of transmitting the data to the 2 nd service system in a 2 nd period,
the control indication comprises an indication of an aperiodic transmission,
in the 2 nd state, at least the transmission function of the 1 st communication processing unit is stopped.
11. A storage medium storing a power saving control program, wherein the power saving control program causes a communication terminal to execute steps 1, 2, 3 and 4,
the communication terminal performs intermittent operation of alternately repeating a 1 st state and a 2 nd state having less power consumption than the 1 st state, including: a 1 st communication processing unit which can communicate with a 2 nd service system for providing a 2 nd service via a communication network configured for the 1 st service; and a 2 nd communication processing section capable of communicating with the connected device,
In the step 1, when a control instruction for the device is received from the 2 nd service system via the 1 st communication processing section, the 2 nd communication processing section is caused to execute a communication process with the device,
in the step 2, the duration of the 2 nd state, i.e., the sleep time, is decided for each of the time periods based on the count result of the number of communications with the device for each of the time periods,
in the 3 rd step, data is acquired from the device in the 1 st period,
in the 4 th step, the data is transmitted to the 2 nd service system in the 2 nd period,
the control indication comprises an indication of an aperiodic transmission,
in the 2 nd state, the communication terminal stops at least the transmission function of the 1 st communication processing unit.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1157069A (en) * 1995-04-28 1997-08-13 菲利浦电子有限公司 Wireless communication system for reliable communication between group of apparatuses
JP2009088914A (en) * 2007-09-28 2009-04-23 Nec Corp Power saving control method, radio mobile station, and program
CN101458868A (en) * 2008-12-23 2009-06-17 上海城市水资源开发利用国家工程中心有限公司 Data collection method used for remote wireless meter reading system
JP2015088807A (en) * 2013-10-29 2015-05-07 シャープ株式会社 Radio communication device and radio information collection system
JP2016071783A (en) * 2014-10-01 2016-05-09 富士通株式会社 Data acquisition device, data acquisition method, and program
CN105784035A (en) * 2016-03-22 2016-07-20 中国计量学院 Low-power-consumption and immersed type thermal gas flow measuring method and device
CN106961471A (en) * 2017-03-03 2017-07-18 上海谱翱数据科技有限公司 Node apparatus and Internet of Things communication subsystem
CN207926642U (en) * 2015-10-19 2018-09-28 上海聚然智能科技有限公司 Sensing data concentrate tube manages acquisition system in device and data set
CN110636478A (en) * 2018-06-22 2019-12-31 阿里巴巴集团控股有限公司 Bluetooth Mesh network system, communication method, device and storage medium thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0870488A (en) * 1994-08-26 1996-03-12 Aichi Tokei Denki Co Ltd Radio meter inspection system
JP2001273578A (en) * 2000-03-27 2001-10-05 Omron Corp Meter-reading data transmitting method, meter-reading method and its device
JP2002257612A (en) * 2001-02-27 2002-09-11 Osaka Gas Co Ltd Remote monitoring device for gas meter and remote meter device for gas meter
JP2007067829A (en) * 2005-08-31 2007-03-15 Saxa Inc Battery-driven communication device and communication method
JP2009169881A (en) * 2008-01-21 2009-07-30 Yamatake Corp Data display device, data display method, and data display program
JP5190031B2 (en) * 2009-06-22 2013-04-24 株式会社日立製作所 Automatic meter reading system and control message transmission method
AU2012244170A1 (en) * 2011-10-26 2013-05-09 Elster Solutions, Llc Meter data collection
CN103513931A (en) * 2012-06-25 2014-01-15 浙江大华技术股份有限公司 Method and system for monitoring storage device
CN103913195A (en) * 2012-12-31 2014-07-09 天津市正方科技发展有限公司 Remote natural gas metering system
JP6726587B2 (en) * 2016-09-29 2020-07-22 大阪瓦斯株式会社 Energy consumption management system
TWI721312B (en) * 2018-08-24 2021-03-11 中華電信股份有限公司 Wireless meter reading system for reading water meter and method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1157069A (en) * 1995-04-28 1997-08-13 菲利浦电子有限公司 Wireless communication system for reliable communication between group of apparatuses
JP2009088914A (en) * 2007-09-28 2009-04-23 Nec Corp Power saving control method, radio mobile station, and program
CN101458868A (en) * 2008-12-23 2009-06-17 上海城市水资源开发利用国家工程中心有限公司 Data collection method used for remote wireless meter reading system
JP2015088807A (en) * 2013-10-29 2015-05-07 シャープ株式会社 Radio communication device and radio information collection system
JP2016071783A (en) * 2014-10-01 2016-05-09 富士通株式会社 Data acquisition device, data acquisition method, and program
CN207926642U (en) * 2015-10-19 2018-09-28 上海聚然智能科技有限公司 Sensing data concentrate tube manages acquisition system in device and data set
CN105784035A (en) * 2016-03-22 2016-07-20 中国计量学院 Low-power-consumption and immersed type thermal gas flow measuring method and device
CN106961471A (en) * 2017-03-03 2017-07-18 上海谱翱数据科技有限公司 Node apparatus and Internet of Things communication subsystem
CN110636478A (en) * 2018-06-22 2019-12-31 阿里巴巴集团控股有限公司 Bluetooth Mesh network system, communication method, device and storage medium thereof

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