Parking lot management system, parking lot management method, slave unit, repeater unit, master unit, head-end device, display board, and program

Abstract

To provide a parking lot management system that can reduce the power consumption of slave units compared to conventional systems. This parking lot management system includes slave units that are installed in parking stalls in a parking lot and transmit vacancy information regarding the presence or absence of vehicles in the parking stalls, repeaters that relay the vacancy information transmitted by the slave units via multi-hop communication, a master unit that receives the vacancy information relayed by the repeaters, and a head-end device that determines the presence or absence of vehicles in the parking stalls based on the vacancy information received by the master unit, and the repeaters and master units form a wireless multi-hop network with the master unit as the root.

Description

[Technical Field]

[0001] The present invention relates to a parking lot management system, a parking lot management method, a slave unit, a repeater unit, a master unit, a head-end device, a display board, and a program. [Background technology]

[0002] In recent years, there have been systems that embed sensors such as pressure-receiving elements and magnetic sensors in parking stalls in parking lots and use the sensors to detect whether a car is parked in the stall and manage parkers. Patent Document 1 discloses a sensor network system that includes an ad-hoc sensor network constructed with numerous sensor devices installed in parking lots and roads, roadside devices that receive information from the sensor devices using wireless communication technology, and on-board devices installed in vehicles, and a parking lot management server device that receives information from the roadside devices and manages the parking lot. In this sensor network system, the sensor devices construct an ad-hoc network and perform multi-hopping between the sensor devices. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-220197 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the sensor network system described in Patent Document 1 has the problem that as the number of sensor devices increases, the frequency of communication for hopping increases, which can lead to increased power consumption. In particular, when the sensor devices are powered by built-in batteries and buried under the pavement surface, maintenance such as battery replacement is not easy, and increased power consumption leads to premature battery depletion, which leads to increased frequency of maintenance such as battery replacement, which becomes a problem.

[0005] The present disclosure has been made in consideration of these circumstances, and provides a parking lot management system, a parking lot management method, a slave unit, a repeater unit, a master unit, a head-end device, a display board, and a program that can reduce the power consumption of slave units, which correspond to sensor devices, more than conventional systems. [Means for solving the problem]

[0006] This disclosure has been made to solve the above-mentioned problems, and one aspect of the present disclosure is a parking lot management system comprising: a slave unit that is installed in a parking space of a parking lot and transmits occupancy information regarding the presence or absence of a vehicle in the parking space; a repeater that relays the occupancy information transmitted by the slave unit via multi-hop communication; a master unit that receives the occupancy information relayed by the repeater; and a head-end device that determines the presence or absence of a vehicle in the parking space based on the occupancy information received by the master unit, wherein the repeater and the master unit form a wireless multi-hop network with the master unit as the root.

[0007] Another aspect of the present disclosure is the parking lot management system described above, wherein the slave unit is equipped with a battery and is buried in the parking stall.

[0008] Another aspect of the present disclosure is the above-mentioned parking lot management system, wherein communication between the slave unit and the repeater conforms to the IoT route communication method in the specific metering system, and communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specific metering system.

[0009] Another aspect of the present disclosure is the parking lot management system described above, which is equipped with a host device that notifies parking lot users whether there is a car in a parking space or whether there is an empty parking space in the direction of travel, based on the determination result by the head-end device.

[0010] Another aspect of the present disclosure is a parking lot management method comprising the steps of: a slave device installed in a parking space of a parking lot transmitting occupancy information regarding the presence or absence of a vehicle in the parking space; a repeater relaying the occupancy information transmitted by the slave device via multi-hop communication; a master device receiving the occupancy information relayed by the repeater; and a head-end device determining the presence or absence of a vehicle in the parking space based on the occupancy information received by the master device, wherein the repeater and the master device form a wireless multi-hop network with the master device as the root.

[0011] Another aspect of the present disclosure is a slave device that is installed in a parking stall in a parking lot and transmits occupancy information regarding the presence or absence of a vehicle in the parking stall to a repeater that relays the information via multi-hop communication.

[0012] Another aspect of the present disclosure is the sub-unit described above, which includes a battery and is embedded in the parking stall.

[0013] Another aspect of the present disclosure is the slave device described above, wherein communication between the slave device and the relay device complies with a communication method of an IoT route in a specific metering system.

[0014] Another aspect of the present disclosure is a repeater that relays occupancy information regarding the presence or absence of a vehicle in a parking space, transmitted from a slave device installed in the parking space, to a master device via multi-hop communication, and forms a wireless multi-hop network with the master device as the root.

[0015] Another aspect of the present disclosure is the repeater described above, wherein communication via the wireless multi-hop network complies with the communication method of an electricity smart meter communication network in a specified metering system.

[0016] Another aspect of the present disclosure is a parent device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, which is transmitted by a child device installed in the parking space and relayed by a repeater through multi-hop communication, and which forms a wireless multi-hop network with the repeater and the parent device as the root.

[0017] Another aspect of the present disclosure is the parent device described above, wherein communication via the wireless multi-hop network complies with the communication method of an electricity smart meter communication network in a specific metering system.

[0018] Another aspect of the present disclosure is a head-end device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, transmitted by a slave device installed in a parking space in a parking lot, relayed to a master device via multi-hop communication by a repeater, receives occupancy information regarding the presence or absence of a vehicle in the parking space transmitted by the master device, and determines the presence or absence of a vehicle in the parking space based on the occupancy information.

[0019] Another aspect of the present disclosure is a display board that displays to users of the parking lot whether there is a car in the parking space or whether there is an empty parking space in the direction of travel, based on occupancy information regarding the presence or absence of a car in the parking space transmitted by a slave device installed in the parking space of a parking lot, relayed to a master device via multi-hop communication by a repeater, and transmitted by the master device.

[0020] Another aspect of the present disclosure is a program for causing a computer to function as a head-end device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, which is transmitted by a slave device installed in a parking space in a parking lot, relayed to a master device via multi-hop communication by a repeater, and transmitted by the master device, and determines whether or not a vehicle is in the parking space based on the occupancy information. [Effects of the Invention]

[0021] The parking lot management system, parking lot management method, slave unit, repeater unit, master unit, head-end device, display board, and program of the present invention can reduce power consumption of the slave unit compared to conventional methods. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic block diagram showing the configuration of a parking lot management system 100 according to an embodiment of the present disclosure. [Figure 2] 10 is a diagram showing a first display example of a display board 60 in the same embodiment. FIG. [Figure 3] 10 is a diagram showing a second display example of the display board 60 in the same embodiment. FIG. [Figure 4] 2 is a schematic block diagram showing the configuration of a slave unit 10 in the embodiment. [Figure 5] 10 is a flowchart illustrating an example of the operation of the parking lot management system 100 in the embodiment. [Figure 6] FIG. 2 is an explanatory diagram illustrating the hardware configuration of each device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic block diagram showing the configuration of a parking lot management system 100 according to one embodiment of the present disclosure. The parking lot management system 100 detects the presence or absence of vehicles in parking stalls in a parking lot and, based on the detection results, notifies users of whether a stall is full or empty. The parking lot management system 100 includes a slave unit 10, a repeater unit 20, a master unit 30, a head end device 40 (Head End System, HES), a host device 50 (host system), and a display board 60 (individual vehicle display board). Note that while the number of slave units 10 is 16 in FIG. 1, this is not limited to 16. Similarly, the number of repeaters 20 is not limited to four, and the number of master units 30 and display boards 60 is not limited to one.

[0024] The slave unit 10 is installed in a parking stall and transmits parking space availability information regarding the presence or absence of a vehicle in the parking stall. The slave unit 10 may transmit the parking space availability information periodically, for example, every 30 seconds, or may transmit the parking space availability information when it detects a change in the presence or absence of a vehicle, or a combination thereof. The slave unit 10 may be equipped with a sensor such as a pressure sensor or a magnetic sensor, and may detect the presence or absence of a vehicle in the parking stall using the sensor. The parking space availability information may be information indicating a value detected by the sensor, or information indicating a determination result of the presence or absence of a vehicle based on the value detected by the sensor. The slave unit 10 may also be equipped with a battery and buried in the parking stall. Although FIG. 1 shows one slave unit 10 installed in one parking stall, two or more slave units 10 may be installed in one parking stall. Communication between the slave unit 10 and the repeater 20 may conform to a communication method of an IoT (Internet of Things) route in a specified metering system. In this way, the slave 10 does not transmit or receive (hopping) vacancy information detected by other slaves 10, so power consumption due to the hopping does not occur, and power consumption can be reduced more than before. As a result, the slave 10 can continue to operate for a sufficiently long period, such as 10 years, without maintenance such as battery replacement.

[0025] The repeater 20 relays the vacancy information transmitted by the slave 10 via multi-hop communication. The repeater 20 and the master 30 form a wireless multi-hop network with the master 30 as the root. The vacancy information is ultimately transmitted to the head-end device 40 via the master 30 at the root of the wireless multi-hop network to which the repeater 20 belongs. Note that communication via this wireless multi-hop network may conform to the communication method of the smart electricity meter communication network in a specified metering system. The repeater 20 may be installed on a pole in the parking lot. In this way, the repeater 20 forms a wireless multi-hop network with the master 30 as the root. Therefore, by arranging the repeater 20 according to the shape of the parking lot, the parking lot management system 100 can ensure a communication range that matches the shape of the parking lot.

[0026] The master unit 30 receives the vacancy information relayed by the repeater 20. The master unit 30 aggregates the vacancy information of the slave units 10 that communicate with the repeater 20 that belong to the wireless multi-hop network with itself as the root. The master unit 30 transmits the received vacancy information to the head-end device 40. The master unit 30 is communicably connected to the head-end device 40 via a wired line such as optical fiber, or an IP (Internet Protocol) network using a wireless line such as LTE (Long Term Evolution) or 5G (5th Generation).

[0027] The head-end device 40 determines whether a vehicle is present in each parking space based on the vacancy information received by the base unit 30. The head-end device 40 transmits the determination result to the host device 50. The head-end device 40 is communicably connected to the host device 50 via an IP network using a wired or wireless line. The head-end device 40 may be realized by one or more computers reading and executing a program. Furthermore, at least some of the functions of the head-end device 40 may be located on a so-called cloud.

[0028] The host device 50 receives the determination result from the head-end device 40 and, based on the determination result, notifies the parking lot user whether there is a car in each parking space or whether there is an empty parking space in each direction of travel using a display board 60. The host device 50 may be realized by one or more computers reading and executing a program. Furthermore, at least some of the functions of the host device 50 may be located on a so-called cloud.

[0029] Display boards 60 are installed inside and outside the parking lot, and display to users of the parking lot whether there is a car in a parking stall or whether there is an empty parking stall in the direction of travel. This display is based on parking stall occupancy information regarding the presence or absence of a car in the parking stall, which is transmitted by slave device 10 installed in the parking stall, relayed to master device 30 via multi-hop communication by repeater device 20, and then transmitted by master device 30. Multiple display boards 60 may be installed, and the content displayed on each display board 60 may differ.

[0030] Fig. 2 is a diagram showing a first display example of the display board 60 in this embodiment. Fig. 2 is an example of displaying whether or not there are any vacant parking spaces in the direction of travel. The example in Fig. 2 shows that the parking spaces in the direction of left turning are full, i.e., there are no vacant spaces, and the parking spaces in the direction of straight travel are empty, i.e., there are vacant spaces.

[0031] Fig. 3 is a diagram showing a second display example by the display board 60 in this embodiment. Fig. 3 is an example of displaying the presence or absence of a car in a parking space in a small car parking lot. In the example in Fig. 3, the parking spaces are shown as rectangles, and the presence or absence of a car in each parking space is indicated by the color of the rectangle, for example, red if a car is parked and green if a car is not parked.

[0032] 4 is a schematic block diagram showing the configuration of slave unit 10 in this embodiment. Slave unit 10 includes sensor 11, main board 12, small board 13, and battery 14. Sensor 11 is a sensor such as a pressure sensor or a magnetic sensor for detecting the presence or absence of a vehicle in a parking stall. Main board 12 includes a CPU (Central Processing Unit), memory, etc., and controls slave unit 10. Small board 13 transmits and receives wireless signals for wireless communication with repeater 20. Battery 14 supplies power to sensor 11, main board 12, and small board 13.

[0033] 5 is a flowchart illustrating an example of the operation of the parking lot management system 100 in this embodiment. First, the master device 30 and the repeater 20 form a wireless multi-hop network with the master device 30 as the root (step S1). Next, the slave device 10 establishes a communication connection with the repeater 20 (step S2). Next, the slave device 10 transmits vacancy / occupancy information (step S3). Next, the repeater 20 relays the vacancy / occupancy information (step S4). Next, the master device 30 receives the relayed vacancy / occupancy information (step S5). Next, the master device 30 transmits the received vacancy / occupancy information to the head-end device (step S6).

[0034] Next, the head-end device 40 receives the transmitted vacancy information (step S7). Next, the head-end device 40 determines whether there is a vehicle in the parking space based on the received vacancy information, and transmits the determination result to the host device 50 (host system) (step S8). Next, the host device 50 receives the transmitted determination result and displays the determination result on the individual vehicle display board (display board 60) (step S9).

[0035] In the above embodiment, the slave unit 10 is installed in the parking stall and transmits the parking stall information, but this is not limiting. For example, the slave unit 10 may be installed in a surveillance camera on a highway or the like and transmit the status of the surveillance camera.

[0036] FIG. 6 is an explanatory diagram illustrating the hardware configuration of each device according to this embodiment. The devices are the head-end device 40 and the higher-level device 50. Each device includes an input / output module I, a storage module M, and a control module P. The input / output module I is implemented by including some or all of the communication module H11, connection module H12, pointing device H21, keyboard H22, display H23, button H3, microphone H41, speaker H42, camera H51, and sensor H52. The storage module M is implemented by including a drive H7. The storage module M may further be configured by including some or all of memory H8. The control module P is implemented by including memory H8 and a processor H9. These hardware components are connected to each other so as to be able to communicate with each other via a bus, and are supplied with power from a power supply H6.

[0037] The connection module H12 is a digital input / output port such as a USB (Universal Serial Bus). The pointing device H21, keyboard H22, and display H23 may be touch panels. The sensor H52 may be an acceleration sensor, a gyro sensor, a GPS receiver module, a proximity sensor, or the like. The power supply H6 is a power supply unit that supplies the electricity necessary to operate each device. The power supply H6 may be a battery. The drive H7 is an auxiliary storage medium such as a hard disk drive or a solid-state drive. The drive H7 may be a non-volatile memory such as an EEPROM or a flash memory, or a magneto-optical disk drive or a flexible disk drive. The drive H7 is not limited to being built into each device, but may also be an external storage device connected to the connector of the connection module H12. The memory H8 is a main storage medium such as a random access memory. The memory H8 may be a cache memory. The memory H8 stores instructions when executed by one or more processors H9. The processor H9 is a CPU (Central Processing Unit). The processor H9 may be an MPU (microprocessing unit) or a GPU (graphics processing unit). The processor H9 reads programs and various data from the drive H7 via the memory H8 and performs calculations to execute instructions stored in one or more memories H8.

[0038] The input / output module I is used in the head-end device 40, the upper device 50, etc. The control module P is used to implement each part of the head-end device 40 and the upper device 50. In this specification, etc., the terms "head-end device 40" and "upper device 50" may be replaced with the term "control module P."

[0039] The present disclosure may be embodied as follows. (1) One embodiment of the present disclosure is a parking lot management system that includes a slave device that is installed in a parking space of a parking lot and transmits occupancy information regarding the presence or absence of a vehicle in the parking space; a repeater that relays the occupancy information transmitted by the slave device via multi-hop communication; a master device that receives the occupancy information relayed by the repeater; and a head-end device that determines the presence or absence of a vehicle in the parking space based on the occupancy information received by the master device, wherein the repeater and the master device form a wireless multi-hop network with the master device as the root.

[0040] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0041] (2) Another embodiment of the present disclosure is the parking lot management system described in (1), wherein the slave unit includes a battery and is buried in the parking stall.

[0042] This eliminates the need for equipment for installing the slave units.

[0043] (3) Another embodiment of the present disclosure is a parking lot management system described in (1) or (2), in which communication between the slave unit and the repeater conforms to the communication method of the IoT route in the specific metering system, and communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specific metering system.

[0044] This allows the use of components for specific weighing systems.

[0045] (4) Another embodiment of the present disclosure is a parking lot management system as described in any one of (1) to (3), which includes a host device that notifies a parking lot user whether there is a car in the parking space or whether there is an empty parking space in the direction of travel based on the determination result by the head-end device.

[0046] This allows parking lot users to easily find out where they can park.

[0047] (5) Another embodiment of the present disclosure is a parking lot management method comprising the steps of: a slave device installed in a parking space in a parking lot transmitting occupancy information regarding the presence or absence of a vehicle in the parking space; a repeater relaying the occupancy information transmitted by the slave device via multi-hop communication; a master device receiving the occupancy information relayed by the repeater; and a head-end device determining the presence or absence of a vehicle in the parking space based on the occupancy information received by the master device, wherein the repeater and the master device form a wireless multi-hop network with the master device as the root.

[0048] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0049] (6) Another embodiment of the present disclosure is a slave device that is installed in a parking stall in a parking lot and transmits occupancy information regarding the presence or absence of a vehicle in the parking stall to a repeater that relays the information via multi-hop communication.

[0050] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0051] (7) Another embodiment of the present disclosure is the sub-unit described in (6), which includes a battery and is buried in the parking space.

[0052] This eliminates the need for equipment for installing the slave units.

[0053] (8) Another embodiment of the present disclosure is a parking lot management system described in (6) or (7), in which communication between the slave unit and the repeater complies with the IoT route communication method in a specific metering system.

[0054] This allows the use of components for specific weighing systems.

[0055] (9) Another embodiment of the present disclosure is a repeater that relays occupancy information regarding the presence or absence of a vehicle in a parking space, transmitted from a slave device installed in the parking space, to a master device via multi-hop communication, and forms a wireless multi-hop network with the master device as the root.

[0056] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0057] (10) Another embodiment of the present disclosure is the repeater described in (9), wherein communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in a specific metering system.

[0058] This allows the use of components for specific weighing systems.

[0059] (11) Another embodiment of the present disclosure is a parent device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, which information is transmitted by a child device installed in the parking space of a parking lot and relayed by a repeater through multi-hop communication, and which forms a wireless multi-hop network with the repeater and the parent device as the root.

[0060] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0061] (12) Another embodiment of the present disclosure is the parent device described in (11), wherein communication via the wireless multi-hop network complies with the communication method of an electricity smart meter communication network in a specific metering system.

[0062] This allows the use of components for specific weighing systems.

[0063] (13) Another embodiment of the present disclosure is a head-end device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, which is transmitted by a slave device installed in a parking space in a parking lot, relayed to a master device via multi-hop communication by a repeater, transmitted by the master device, and determines the presence or absence of a vehicle in the parking space based on the occupancy information.

[0064] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0065] (14) Another embodiment of the present disclosure is a display board that displays to users of the parking lot whether there is a car in a parking space or whether there is an empty parking space in the direction of travel, based on occupancy information regarding the presence or absence of a car in the parking space transmitted by a slave device installed in the parking space of a parking lot, relayed to a master device via multi-hop communication by a repeater, and transmitted by the master device.

[0066] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0067] (15) Another embodiment of the present disclosure is a program for causing a computer to function as a head-end device that receives occupancy information regarding the presence or absence of a vehicle in a parking space, which is transmitted from a slave device installed in a parking space in a parking lot, relayed to a master device via multi-hop communication by a repeater, and transmitted by the master device, and determines the presence or absence of a vehicle in the parking space based on the occupancy information.

[0068] This means that the handset no longer needs to relay occupancy information, thereby reducing power consumption compared to previous models.

[0069] 1 may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed to realize the head-end device 40 and the host device 50. Note that the term "computer system" here includes hardware such as an OS and peripheral devices.

[0070] "Computer-readable recording media" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into computer systems. Furthermore, "computer-readable recording media" also includes devices that dynamically store programs for a short period of time, such as communication lines used when transmitting programs over networks like the Internet or over communication lines like telephone lines, and devices that store programs for a fixed period of time, such as volatile memory within computer systems that serve as servers or clients. The programs may also be programs that implement some of the aforementioned functions, or may be programs that can realize the aforementioned functions in combination with programs already stored in the computer system.

[0071] The embodiments of this disclosure have been described in detail above with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of this disclosure. [Explanation of symbols]

[0072] 10 Handsets 20 Repeater 30 Base Unit 40 Headend Equipment 50 Upper device 60 Display board 100 Parking Management System

Claims

1. a slave unit that is installed in a parking space of a parking lot and transmits occupancy information regarding whether or not a vehicle is in the parking space; a relay device that relays the occupancy information transmitted by the slave device through multi-hop communication; a master unit that receives the occupancy information relayed by the repeater; a head-end device that determines whether or not there is a car in the parking space based on the vacancy information received by the parent device; Equipped with The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Parking management system.

2. The parking lot management system according to claim 1 , wherein the slave unit includes a battery and is embedded in the parking stall.

3. 2. The parking lot management system of claim 1, further comprising a host device that notifies a parking lot user whether there is a car in the parking space or whether there is an empty parking space in the direction of travel based on the determination result by the head-end device.

4. a step in which a slave device installed in a parking space of a parking lot transmits occupancy information regarding the presence or absence of a vehicle in the parking space; a step of relaying the vacancy information transmitted by the slave device through multi-hop communication by a relay device; a step in which a master unit receives the occupancy information relayed by the relay unit; a step in which a head end device determines whether or not a vehicle is present in the parking space based on the vacancy information received by the base unit; and The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Parking lot management methods.

5. The parking lot is installed in a parking space of the parking lot, and transmits vacancy information regarding the presence or absence of a vehicle in the parking space to a repeater that relays the information via multi-hop communication; The relay device and the master device that receives the vacancy information relayed by the relay device are slave devices that form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Handset.

6. The handset according to claim 5, further comprising a battery and embedded in the parking stall.

7. A repeater that relays parking space availability information regarding the presence or absence of a car in a parking space transmitted from a slave device installed in the parking space to a master device by multi-hop communication, The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Repeater.

8. A master unit receives parking space availability information regarding the presence or absence of a vehicle in a parking space, the parking space availability information being transmitted from a slave unit installed in the parking space and relayed by a repeater through multi-hop communication, The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Parent unit.

9. The parking lot occupancy information is transmitted from a slave device installed in a parking space of the parking lot, relayed to a master device by multi-hop communication using a repeater, and the master device receives occupancy information regarding the presence or absence of a car in the parking space. determining whether or not a vehicle is present in the parking space based on the vacancy information; The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Headend equipment.

10. The parking space information is transmitted from a slave device installed in a parking space in the parking lot, relayed to a master device by multi-hop communication using a repeater, and based on the parking space information transmitted by the master device, the presence or absence of a car in the parking space is displayed to a user of the parking lot, whether or not there is a car in the parking space, or whether or not there is an empty parking space in the direction of travel; The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. Display board.

11. Computer, The parking lot occupancy information is transmitted from a slave device installed in a parking space of the parking lot, relayed to a master device by multi-hop communication using a repeater, and the master device receives occupancy information regarding the presence or absence of a car in the parking space. a program for causing the head end device to function as a head end device that determines whether or not a vehicle is present in the parking stall based on the vacancy information, The relay device and the master device form a wireless multi-hop network with the master device as a root, The communication between the slave device and the relay device complies with the IoT route communication method in the specified metering system, The communication via the wireless multi-hop network conforms to the communication method of the electricity smart meter communication network in the specified metering system. program.

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