JP6826446B2 - Wireless communication system - Google Patents

Description

The present invention relates to a wireless communication system including a mobile wireless terminal.

Conventionally, there has been disclosed a wireless distance detection system in which a wireless tag is attached to a portable item such as a key or a wallet so that a mobile phone and the wireless tag perform short-range communication (for example, Patent Document 1). In this wireless distance detection system, the wireless detection program of the mobile phone periodically transmits an inquiry signal to the wireless tag, and the wireless tag returns the ID as a response signal. Then, the wireless detection program detects the distance from the strength of the received signal from the wireless tag, and displays an alarm or outputs an alarm when the distance exceeds the threshold value.

Japanese Unexamined Patent Publication No. 2013-054518

However, as in Patent Document 1, when the inquiry signal is periodically transmitted from the mobile phone side in order to grasp the positional relationship between the two, the wireless tag side must always wait so that the signal can be received. However, the power consumption will increase. Wireless tags are often designed to be small for that purpose, and the battery capacity tends to be small. Therefore, as soon as the power consumption increases, the battery needs to be replaced or charged.

In view of such a problem, an object of the present invention is to provide a wireless communication system capable of appropriately grasping the positional relationship between terminals with low power consumption.

In order to solve the above problems, in the wireless communication system of the present invention in which the wireless terminal periodically attempts to transmit the RIT Data Request Frame toward the reference terminal in the RIT system, the wireless terminal communicates with the reference terminal. After transmitting the RIT Data Request Frame, it is equipped with a wireless communication unit that is in the reception standby state for a predetermined period, and the reference terminal is in the reception standby state if there is target data to be transmitted, and the wireless terminal is in the reception standby state. When the RIT Data Request Frame is received from, the reference communication unit that transmits the target data to the wireless terminal and the communication determination unit that determines that communication with the wireless terminal is possible based on the RIT Data Request Frame received from the wireless terminal. And, the reference communication unit transmits the target data that generates any of sound, light, and vibration to the wireless terminal, and the wireless terminal uses any of sound, light, and vibration based on the target data. or to generate and said Rukoto.

The wireless terminal may further include a battery that supplies power to the wireless communication unit, and a battery determination unit that transmits to that effect to the reference terminal when the remaining capacity of the battery falls below the threshold value.

According to the present invention, it is possible to appropriately grasp the positional relationship between terminals with low power consumption.

It is explanatory drawing which showed the schematic structure of the wireless communication system. It is a functional block diagram which showed the schematic structure of a wireless terminal. It is a functional block diagram which showed the schematic structure of a gateway device. It is explanatory drawing for demonstrating the standby mode of communication in RIT system. It is explanatory drawing for demonstrating the data transmission mode in the RIT system. It is explanatory drawing which showed the schematic structure of the wireless communication system in 1st Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 1st Embodiment. It is explanatory drawing which showed the schematic structure of the wireless communication system in 2nd Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 2nd Embodiment. It is explanatory drawing which showed the schematic structure of the wireless communication system in 3rd Embodiment. It is explanatory drawing which showed the schematic structure of the wireless communication system in 4th Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 4th Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 4th Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 4th Embodiment. It is explanatory drawing which showed the schematic structure of the wireless communication system in 5th Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system in 5th Embodiment. It is explanatory drawing which showed the schematic structure of the wireless communication system in 6th Embodiment. It is explanatory drawing which showed the other schematic structure of the wireless communication system. It is explanatory drawing which showed the other schematic structure of the wireless communication system.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, etc. shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

(Wireless communication system 100)
FIG. 1 is an explanatory diagram showing a schematic configuration of a wireless communication system 100. As shown in FIG. 1, the wireless communication system 100 includes a wireless terminal 110, a communication terminal 112, a gateway device 114, a network 116, a center device 118, and a mobile terminal 120.

The wireless terminal 110 is a mobile (portable) device and can perform wireless communication with other wireless terminals 110 and a gateway device 114. The wireless terminal 110 can be moved by itself, but can be built in or attached to another object. Here, as other items, various portable items such as a key 210, a wallet, a regular case and a mobile terminal 120 described later, and various movable items such as a bicycle 212, a motorbike, and a car can be applied. it can.

In the present embodiment, as communication between the wireless terminals 110 and between the wireless terminals 110 and the gateway device 114, wireless communication through the RIT (Receiver Initiated Transmission) method will be described as an example. The RIT method is used for multi-hop communication in which data is transmitted and received between wireless terminals (nodes) 110 by a relay method and the route of the terminal passing through can be changed according to the radio wave condition, and the communication standard IEEE802.1.5. This is a communication method that conforms to / 4e and realizes low power consumption. The RIT method will be described in detail later.

The communication terminal 112 can communicate with the gateway device 114 wirelessly or by wire. Here, as the communication terminal 112, it is assumed that devices such as a speaker 214, a door 216, a water heater 218, and a smart meter (gas meter) 220 are installed in a resident's house. The speaker 214 outputs audio. Door 216 is used for resident access to and from the resident's home. The water heater 218 supplies hot water by gas. The smart meter 220 is used, for example, when supplying gas from a gas company to a resident, and automatically reads the amount of gas used.

Here, an example in which the communication terminal 112 is incorporated in the smart meter 220 and information on the use of gas is transmitted to the center device 118 through the gateway device 114 will be described, but the smart meter 220 is not limited to this case. The gateway device 114 can also be incorporated into the center device 118 to directly transmit information regarding the use of gas. In this case, the smart meter 220 has the following functions of the gateway device 114.

The gateway device 114 is installed, for example, corresponding to a resident's house, collects data of the wireless terminal 110 and the communication terminal 112, and distributes the data to the wireless terminal 110 and the communication terminal 112. Therefore, it is assumed that the wireless terminal 110 and the communication terminal 112 to be communicated with the gateway device 114 are the property of the resident. In addition, the gateway device 114 can also establish communication with the center device 118.

The network 116 is a communication network including a mobile phone network, a PHS (Personal Handyphone System) network, and the like, and establishes communication between the gateway device 114 and the center device 118 and communication between the center device 118 and the mobile terminal 120. The center device 118 is a device composed of a computer or the like and belongs to the administrator side of the wireless communication system 100 such as a gas company or an electric power company. Data is collected from the gateway device 114, and data is collected from the gateway device 114. To deliver. The mobile terminal 120 is an electronic device capable of wireless communication such as a smartphone, a mobile phone, a PHS, a PDA (Personal Digital Assistant), a tablet computer, and a personal computer, and can establish communication with the center device 118.

(Wireless terminal 110)
FIG. 2 is a functional block diagram showing a schematic configuration of the wireless terminal 110. The wireless terminal 110 includes a wireless communication unit 150, a wireless storage unit 152, a battery 154, and a wireless central control unit 156. The wireless communication unit 150 establishes wireless communication with the gateway device 114 and other wireless terminals 110. The wireless storage unit 152 is composed of a ROM, RAM, flash memory, HDD, and the like, and stores programs and various data used in the wireless terminal 110. The battery 154 stores electrical energy and supplies at least power to the wireless communication unit 150.

The wireless central control unit 156 is composed of a CPU (Central Processing Unit) and a DSP (Digital Signal Processor), and controls the entire wireless terminal 110 by using a program stored in the wireless storage unit 152. The wireless central control unit 156 also functions as a wireless communication control unit 160, a wireless storage control unit 162, a notification control unit 164, and a battery determination unit 166.

The wireless communication control unit 160 controls the wireless communication unit 150 and performs RIT-type communication with the gateway device 114 and other wireless terminals 110. The wireless storage control unit 162 stores the data transmitted from the gateway device 114 and the other wireless terminal 110 and the data generated by the own device and the device belonging to the own device in the wireless storage unit 152. The notification control unit 164 generates any of sound, light, and vibration. The battery determination unit 166 detects the remaining capacity of the battery 154 based on the radio wave strength and the voltage of the battery 154. Since various existing techniques can be applied to the method for detecting the remaining capacity of the battery 154, the description thereof will be omitted here.

In this way, the wireless terminal 110 stores the data received from the other wireless terminal 110 or the gateway device 114, and the data stored in the wireless storage unit 152 can be stored in the wireless storage unit 152 as needed by the other wireless terminal 110 or the gateway device. Send to 114. Hereinafter, such data to be transmitted will be referred to as target data.

(Gateway device 114)
FIG. 3 is a functional block diagram showing a schematic configuration of the gateway device 114. The gateway device 114 includes a gate communication unit 170, a gate storage unit 172, and a gate central control unit 174. The gate communication unit 170 establishes wireless communication through the center device 118 and the network 116, establishes RIT-type wireless communication with the wireless terminal 110, and establishes wireless or wired communication with the communication terminal 112. The gate storage unit 172 is composed of a ROM, RAM, flash memory, HDD, and the like, and stores programs and various data used in the gateway device 114.

The gate central control unit 174 is composed of a CPU and a DSP, and controls the entire gateway device 114 by using a program stored in the gate storage unit 172. The gate central control unit 174 also functions as a gate communication control unit 180, a gate memory control unit 182, a communication determination unit 184, an unlock notification unit 186, and a gas notification unit 188.

The gate communication control unit 180 controls the gate communication unit 170 to perform RIT-type communication with the wireless terminal 110, and also carries out communication with the communication terminal 112 by the existing method. The gate storage control unit 182 stores the data transmitted from the wireless terminal 110 and the communication terminal 112, and the data generated by the own machine and the device belonging to the own machine in the gate storage unit 172. The communication determination unit 184 determines whether or not communication with the wireless terminal 110 can be established. The unlock notification unit 186 notifies that the key of the door 216 is in the unlocked state. The gas notification unit 188 notifies that the gas is in use. Hereinafter, the RIT-type communication performed between the wireless terminals 110 and between the wireless terminals 110 and the gateway device 114 will be described in detail.

(RIT communication)
FIG. 4 is an explanatory diagram for explaining a communication standby mode in the RIT method. Here, a case where two wireless terminals 110a and 110b perform RIT type wireless communication will be described. As shown in FIG. 4, the wireless terminal 110a and the wireless terminal 110b are respectively (periodically) at preset intermittent operation intervals (MAC RIT Period), and the RIT Data Request Frame (frame RFa, in FIG. 4). (Indicated by frame RFb) is transmitted. The RIT Data Request Frame has a frame configuration similar to that of the MAC unit of the communication standard IEEE802.5.4.

Specifically, the frames RFa and RFb transmitted by the wireless terminals 110a and 110b include, for example, a network ID (PANID: Personal Area Network ID) of the own unit (wireless terminals 110a and 110b) and a PAN to which the own unit is added. Identification information), address information (identification information for identifying each wireless terminal 110 included in the wireless communication system 100), and the like are included. Further, the wireless terminals 110a and 110b store network IDs and address information related to other wireless terminals 110 that transmit target data to their own device in the wireless storage unit 152, and the frames RFa and RFb contain this network. It also includes ID and address information.

Then, after the transmission of the frames RFa and RFb, the wireless terminals 110a and 110b are in the WD (RIT Data Wait Duration) and the first reception standby state for a predetermined period set in advance. The first reception standby state is a state in which the wireless central control unit 156 controls the wireless communication unit 150 so that the function required for receiving the target data becomes effective.

FIG. 5 is an explanatory diagram for explaining a data transmission mode in the RIT method. As shown in FIG. 5, when the target data TDFa to be transmitted is generated in the wireless terminal 110a (when acquired from the outside or generated internally), the wireless terminal 110a waits for the second reception as shown by hatching in FIG. It becomes a receiving state. The second reception standby state is a state in which the wireless central control unit 156 controls the wireless communication unit 150 so that the function required for receiving the frame RFb becomes effective.

Then, the wireless terminal 110a receives the frame RFb transmitted by the wireless terminal 110b. If the network ID and address information included in the frame RFb indicate the own device, the wireless terminal 110a transmits the target data TDFa to the wireless terminal 110b.

Since the wireless terminal 110b is in the WD and first reception standby state for a predetermined period after transmitting the frame RFb, it is possible to receive the target data TDFa transmitted by the wireless terminal 110a.

As described above, in the RIT method, the wireless terminal 110b can receive the target data TDFa by intermittently transmitting the frame RFb. Therefore, for example, the transmission function of the wireless terminal consumes more power than the CSL (Coordinated Sampled Listening) method in which the transmission function of the wireless terminal performs continuous transmission of the Wakeup Frame called Wakeup Sequence and prompts the reception function of the other wireless terminal to receive the signal. It can be significantly reduced.

By adopting such a RIT method, the time for continuously outputting radio waves can be significantly reduced. Further, by suppressing the radio wave strength, low power consumption operation for a long time becomes possible. On the other hand, in the RIT method, the communication range is limited. For example, as shown in FIG. 1, when the wireless terminal 110 is used in a resident's house, the communicable range 200 of the wireless terminal 110 is limited to a predetermined distance range from the gateway device 114 represented by a solid circle. Here, the communication by the RIT method is applied to various applications by utilizing the limited communication range as described above.

(First embodiment: location confirmation)
FIG. 6 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the first embodiment. Here, an example of confirming whether or not the key 210, which is a carry-on item, exists in the resident's house through the mobile terminal 120 will be described. The key 210 is mentioned here as a carry-on item, but it goes without saying that various movable items such as wallets and regular holders can be used.

In the example of FIG. 6, the wireless terminal 110 is built in the key 210. Therefore, the gateway device 114 can establish wireless communication by the RIT method with the wireless terminal 110 built in the key 210 if the position of the key 210 is within the communicable range 200, that is, in the resident's house. it can. On the other hand, if the position of the key 210 is out of the communicable range 200, the gateway device 114 and the wireless terminal 110 built in the key 210 cannot establish wireless communication by the RIT method.

Specifically, for example, suppose that the resident 10 notices that he does not carry the key 210 on the go. Here, the resident 10 confirms the location of the key 210 from the center device 118 through a predetermined application of the mobile terminal 120 in order to confirm whether or not the key 210 exists in the resident's house.

The gate communication unit (reference communication unit) 170 of the gateway device (reference terminal) 114 attempts to communicate with the wireless terminal 110 by the RIT method. Upon receiving the location confirmation command from the center device 118, the communication determination unit 184 of the gateway device 114 has a wireless terminal built in the key 210 within a predetermined period (for example, MAC RIT Period) until immediately before receiving the location confirmation command. It is determined whether or not the RIT Data Request Frame has been received from the 110, and if the RIT Data Request Frame has been received, it is determined that communication with the wireless terminal 110 is possible. Here, the RIT Data Request Frame, which is periodically output in the RIT method, is used not only for sending and receiving data but also for deriving the positional relationship.

Then, the communication determination unit 184 transmits the determination result to the mobile terminal 120 through the center device 118. In this way, the resident 10 confirms whether or not the distance between the wireless terminal 110 and the gateway device 114 is within the communicable range 200, that is, whether or not the key 210 exists in the resident's house through the mobile terminal 120. It becomes possible to do.

When the gateway device 114 and other wireless terminals 110 are arranged in each of the plurality of rooms divided into a plurality of rooms in the resident's house, the wireless terminal 110 determines the radio wave intensity of the signal received from the plurality of gateway devices 114. By comparing and detecting which gateway device 114 is closer from the radio wave strength, it is possible to grasp which of the plurality of rooms the wireless terminal 110 is located in. By using such a configuration, the resident 10 can confirm in which room the key 210 is located.

FIG. 7 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the first embodiment. Here, an example of confirming the position of the key 210 in the resident's house through the mobile terminal 120 will be described. Further, an example in which the wireless terminal 110 and the vibrating unit 210a are built in the key 210 and both are connected will be given.

For example, suppose that the resident 10 does not know the position of the key 210 in the resident's house. Here, the resident 10 confirms the position of the key 210 from the center device 118 through a predetermined application of the mobile terminal 120 in order to confirm the position of the key 210.

Upon receiving the command for confirming the position of the key 210 from the center device 118, the gate communication unit (reference communication unit) 170 of the gateway device (reference terminal) 114 causes the wireless terminal 110 built in the key 210 to vibrate. Send data. Then, the notification control unit 164 of the wireless terminal 110 generates vibration through the vibration unit 210a also built in the key 210 based on the target data. Here, an example in which the notification control unit 164 generates vibration through the vibration unit 210a is given, but the present invention is not limited to this case, and sound or light may be generated.

In this way, the resident 10 can know the position of the key 210 based on the fact that the key 210 (more precisely, the vibrating unit 210a built in the key 210) is vibrating.

At this time, the communication determination unit 184 of the gateway device 114 determines whether or not the RIT Data Request Frame has been received from the wireless terminal 110 built in the key 210 within a predetermined period, and the determination result is determined by the center. It may be transmitted to the mobile terminal 120 through the device 118. In this way, even if the detailed position of the key 210 is not known, the resident 10 determines whether or not at least the distance between the wireless terminal 110 and the gateway device 114 is within the communicable range 200 through the mobile terminal 120. , It becomes possible to confirm whether or not the key 210 exists in the resident's house.

Here, it is possible to grasp the positional relationship between the terminals (gateway device 114 and the wireless terminal 110) while reducing the power consumption of the wireless terminal 110 by utilizing the limited communication range of the communication by the RIT method. It becomes.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

(Second embodiment: battery level detection)
FIG. 8 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the second embodiment. Here, an example of checking the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210 existing in the resident's house will be described. The key 210 is mentioned as a carry-on item here as well, but it goes without saying that various movable items such as wallets and regular holders can be used.

In the example of FIG. 8, the wireless terminal 110 is built in the key 210. Therefore, the gateway device 114 can establish wireless communication by the RIT method with the wireless terminal 110 built in the key 210 if the position of the key 210 is within the communicable range 200, that is, in the resident's house. it can. When the wireless communication is established in this way, the gateway device 114 can confirm the remaining capacity of the battery 154 of the wireless terminal 110.

Specifically, for example, the battery determination unit 166 of the wireless terminal 110 detects the remaining capacity of the battery 154 at predetermined cycles (for example, one day). Then, when the remaining capacity of the battery 154 becomes equal to or less than a predetermined threshold value, the battery determination unit 166 transmits to that effect to the gateway device (reference terminal) 114.

When the gate communication control unit 180 of the gateway device 114 grasps that the remaining capacity of the battery 154 is equal to or less than the threshold value, the target data for generating sound is transmitted to the speaker 214 through the gate communication unit (reference communication unit) 170. It transmits to the built-in communication terminal 112. The communication terminal 112 generates sound through the speaker 214 based on the target data. Here, an example in which sound is generated through the speaker 214 is given, but not limited to this case, light or vibration may be generated.

Further, at this time, the battery 154 is dictated by a mode in which the wireless terminal 110 having a low remaining capacity of the battery 154 and a portable item in which the battery 154 is built can be identified, for example, a voice saying "The battery of the key is low." It may be notified that the remaining capacity of is equal to or less than the threshold value.

The wireless terminal 110 built in such a key 210 or the like is often left in a state where the remaining capacity is not grasped. Therefore, even if the position of the key 210 is searched for by the means shown in the first embodiment, the remaining capacity of the battery 154 may not be available at that time, and the wireless terminal 110 may become unusable. In this case, the key 210 does not exist in the resident's house by the means shown in the first embodiment.

Here, when the remaining capacity of the battery 154 of the wireless terminal 110 becomes equal to or less than the threshold value, the speaker 214 notifies that fact, so that the resident 10 can replace the battery 154 at the optimum timing. Further, in the RIT method, it is possible to suppress the power consumption for detecting the remaining capacity of the battery 154 in this way, so that the remaining capacity of the battery 154 is exhausted in order to detect the remaining capacity of the battery 154. The advantages of the RIT method, such as low power consumption and long-time driving, can be utilized without occurring. In this way, it is possible to avoid the problem that the wireless terminal 110 cannot be used due to the lack of remaining capacity of the battery 154.

By applying the configuration for notifying that the remaining capacity of the battery 154 is low to the first embodiment, the remaining capacity of the battery 154 is exhausted, and the key 210 is present in the resident's house. Regardless, it is possible to avoid a situation where it does not exist.

Further, here, when the remaining capacity of the battery 154 becomes equal to or less than the threshold value, the battery determination unit 166 has described by giving an example of notifying the fact through the speaker 214. However, not limited to this case, when another speaker is built in the key 210 as in the wireless terminal 110, the remaining capacity of the battery 154 in the key 210 itself becomes equal to or less than the threshold value due to, for example, a beep sound. May be notified from another speaker.

FIG. 9 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the second embodiment. Here, an example of confirming the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210 through the mobile terminal 120 will be described.

For example, suppose that the resident 10 attempts to check the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210 in the resident's house. Here, the resident 10 confirms the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210 from the center device 118 through a predetermined application of the mobile terminal 120.

Upon receiving the command for confirming the remaining capacity from the center device 118, the gate communication unit 170 of the gateway device 114 transmits the target data for asking the remaining capacity of the battery 154 to the wireless terminal 110 built in the key 210. Then, the battery determination unit 166 of the wireless terminal 110 detects the remaining capacity of the battery 154 at that time based on the target data, and transmits the detected remaining capacity of the battery 154 to the gateway device 114 through the wireless communication unit 150. Then, the gateway device 114 transmits the remaining capacity of the battery 154 to the mobile terminal 120 through the center device 118.

In this way, the resident 10 can confirm the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210.

Further, by applying the configuration for confirming the remaining capacity of the battery 154 to the first embodiment, the remaining capacity of the battery 154 is exhausted, and the key 210 is present in the resident's house. It is possible to avoid a situation where it does not exist.

At this time, the communication determination unit 184 of the gateway device 114 determines whether or not the RIT Data Request Frame has been received from the wireless terminal 110 built in the key 210 within a predetermined period, and the determination result is determined by the center. It may be transmitted to the mobile terminal 120 through the device 118. In this way, the resident 10 determines whether or not at least the distance between the wireless terminal 110 and the gateway device 114 is within the communicable range 200 through the mobile terminal 120, that is, whether or not the key 210 exists in the resident's house. Can be confirmed.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

(Third embodiment: loss detection)
FIG. 10 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the third embodiment. Here, an example of notifying that the bicycle 212 has been taken away from the resident's house will be described. Although the bicycle 212 is mentioned here as the target, it goes without saying that various movable objects such as motorbikes and cars can be adopted. It can also be applied to pets and children who move by themselves.

In the example of FIG. 10, the wireless terminal 110 is built in the bicycle 212. Therefore, if the position of the bicycle 212 is within the communicable range 200, that is, if the position of the bicycle 212 is within the communication range 200, that is, if the gateway device 114 or the other wireless terminal 110 is in the resident's house, the wireless terminal 110 built in the bicycle 212 and the radio by the RIT method Communication can be established. On the other hand, if the position of the bicycle 212 is out of the communicable range 200, it becomes impossible to establish wireless communication by the RIT method with the wireless terminal 110 built in the bicycle 212.

Specifically, the gate communication unit (reference communication unit) 170 of the gateway device 114 (reference terminal) attempts to communicate with the wireless terminal 110 by the RIT method. The communication determination unit 184 of the gateway device 114 determines whether or not the RIT Data Request Frame has been received from the wireless terminal 110 built in the bicycle 212 within a predetermined period, and if the RIT Data Request Frame has been received, the communication determination unit 184 has determined that the RIT Data Request Frame has been received. It is determined that communication with the wireless terminal 110 is possible.

Here, for example, it is assumed that the bicycle 212 is taken away (stolen) from the resident's house by a third party. In this way, when the RIT Data Request Frame is not received within a predetermined period (when it is interrupted), the communication determination unit 184 determines that communication with the wireless terminal 110 is impossible, and makes a sound through the gate communication unit 170. The target data to be generated is transmitted to the communication terminal 112 built in the speaker 214. The communication terminal 112 generates sound through the speaker 214 based on the target data. In this way, the resident 10 can know at an early stage that the bicycle 212 has been taken away.

Here, an example in which sound is generated through the speaker 214 is given, but not limited to this case, light or vibration may be generated. Also, at this time, the bicycle 212 from the resident's house can be identified by the wireless terminal 110 that has become unable to communicate or the object in which it is built, for example, by the voice "The bicycle has been stolen." May be notified that the bicycle has been separated. Further, here, an example is given in which the communication determination unit 184 determines that communication with the wireless terminal 110 is impossible at an arbitrary time point, thereby notifying the fact, but the case is not limited to this case. When the state in which communication with the wireless terminal 110 is possible changes to the state in which communication is not possible (according to the communication history), a notification to that effect may be given.

Further, the communication determination unit 184 may transmit the determination result that communication with the wireless terminal 110 is impossible to the mobile terminal 120 through the center device 118. In this way, the resident 10 grasps through the mobile terminal 120 that the distance between the wireless terminal 110 and the gateway device 114 is longer than the communicable range 200, that is, the bicycle 212 has been taken out of the resident's house. It becomes possible.

Further, by attaching the wireless terminal 110 to a pet or a child, even if the pet or the child is unintentionally separated from the resident's house, the mobile terminal 120 informs the pet or the child at an early stage, so that the pet or the child is gone. It is possible to prevent accidents such as becoming unknown.

Further, as described with reference to FIG. 9 in the second embodiment, when the remaining capacity of the battery 154 of the wireless terminal 110 becomes equal to or less than the threshold value, the speaker 214 may notify the fact. Further, as described in the second embodiment, the remaining capacity of the battery 154 of the wireless terminal 110 built in the key 210 can be confirmed through the mobile terminal 120. In this way, the resident 10 can replace the battery 154 at the optimum timing, and can avoid the problem that the wireless terminal 110 cannot be used due to the lack of the remaining capacity of the battery 154.

Here, it is possible to grasp the positional relationship between the terminals (gateway device 114 and the wireless terminal 110) while reducing the power consumption of the wireless terminal 110 by utilizing the limited communication range of the communication by the RIT method. It becomes.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

(Fourth embodiment: lock confirmation)
FIG. 11 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the fourth embodiment. Here, when the resident 10 is in the resident's house and the door is unlocked, an example of notifying that fact will be described. Although an example in which the wireless terminal 110 is built in the mobile terminal 120 is given here, it does not mean that the two are present as separate bodies.

Specifically, the key sensor 216a mounted on the door 216 detects the open / closed state of the key of the door 216 of the resident's house. Then, the communication terminal 112 built in the door 216 monitors the open / closed state of the key through the key sensor 216a, and if the key is in the unlocked state, notifies the gateway device 114 to that effect.

Here, it is assumed that the resident 10 returns home from outside and enters the resident's house, and the mobile terminal 120 owned by the resident 10 also enters the resident's house. Then, the wireless terminal 110 built in the mobile terminal 120 is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 of the gateway device 114 establishes communication with the wireless terminal 110 (RIT Data Request). Receive Frame). Then, the unlock notification unit 186 of the gateway device 114 starts timing when the communication determination unit 184 establishes communication with the wireless terminal 110 on condition that the open / closed state is received from the key sensor 216a. Then, when the open / closed state of the key detected by the key sensor 216a is in the unlocked state for a predetermined time (for example, 10 minutes) after the start of time counting, the unlocking notification unit 186 moves the mobile terminal through the center device 118. Notify 120 to that effect.

In this way, the resident 10 can grasp that the door 216 is unlocked through the mobile terminal 120. Here, the unlocked state of the door 216 is not always notified, but only when a predetermined time has passed after entering the resident's house, that is, when the door 216 is forgotten to be locked after returning home. Since this is notified, it is notified only when the notification is originally required without receiving unnecessary and frequent notification of locking and unlocking. Therefore, the resident 10 does not neglect the notification itself because the frequency of notification of the unlocked state is too high.

Further, by notifying only when the open / closed state of the key detected by the key sensor 216a is the unlocked state for a predetermined time after the start of the time counting, the visitor visits during the predetermined time and the key There is no need to uselessly notify the unlocking even when there is a specific reason that the key is unlocked, such as when the open / closed state is changed.

Further, the communication determination unit 184 locks the door not only to the mobile terminal 120 of the resident 10 in the resident's house but also to the mobile terminal 120 of the resident 10 outside the resident's house, for example, a guardian or the like. May be notified that is in the unlocked state. In this way, the guardian can know that the door 216 is unlocked even when he / she is out of the resident's house. Further, in this case, the guardian may be able to shift the key to the locked state by using the mobile terminal 120 through the center device 118 and the gateway device 114 (remote control is performed). In this way, the guardian can operate the open / closed state of the door 216 of the resident's house to make it a safe state even outside the resident's house.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

Further, here, the communication determination unit 184 is mentioned as the home detection unit, the wireless terminal 110 built in the mobile terminal 120 is included in the communication range 200 of the gateway device 114, and the communication determination unit 184 is with the wireless terminal 110. By establishing communication (receiving the RIT Data Request Frame), the resident 10 was detected at home. However, not limited to such cases, it is possible to detect that a smart meter 220, a water heater 218, a gas stove, etc. have been used, detect a person with a motion sensor, or a position detection device such as GPS (Global Positioning System). Various means for detecting the home state in which the resident 10 is at home can be used, such as detecting the presence of the resident in the resident's house.

FIG. 12 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the fourth embodiment. Here, when the resident 10 is taking a bath in the resident's house and the door 216 is in the unlocked state, an example of notifying that fact will be described.

Specifically, the key sensor 216a built in the door 216 detects the open / closed state of the key of the door 216 of the resident's house. Then, the communication terminal 112 built in the door 216 monitors the open / closed state of the key through the key sensor 216a, and if the key is in the unlocked state, notifies the gateway device 114 to that effect. Further, the gas sensor 218a built in the water heater 218 detects the use of gas in the water heater 218. Then, the communication terminal 112 built in the water heater 218 monitors the water heater 218 through the gas sensor 218a, and if the water heater 218 is in use, notifies the gateway device 114 to that effect.

Here, when the resident 10 takes a bath in the resident's house, the water heater 218 corresponding to the bathroom is in use. When the unlock notification unit 186 of the gateway device 114 receives the open / closed state from the key sensor 216a and the usage state of the water heater 218, the unlock notification unit 186 notifies the mobile terminal 120 to that effect through the center device 118.

In this way, the resident 10 can grasp through the mobile terminal 120 that the door 216 is unlocked before or during bathing. Here, the unlocked state of the door 216 is not always notified, but only when an attempt is made to take a bath in a state where the door 216 is forgotten to be closed or when the person takes a bath, so that it is not necessary to lock or unlock. Moreover, without receiving high-frequency notification, notification is performed only when the notification is originally required. Therefore, the resident 10 does not neglect the notification itself because the frequency of notification of the unlocked state is too high.

Further, the communication determination unit 184 has a door 216 not only on the mobile terminal 120 of the resident 10 in the resident's house but also on the mobile terminal 120 of the resident 10 outside the resident's house, for example, a guardian or the like. You may notify that the key is in the unlocked state. In this way, the guardian can know that the door 216 is unlocked even when he / she is out of the resident's house. Further, in this case, the guardian may be able to shift the key to the locked state by using the mobile terminal 120 through the center device 118 and the gateway device 114 (remote control is performed). In this way, the guardian can operate the open / closed state of the door 216 of the resident's house to make it a safe state even outside the resident's house.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

Further, here, an example of detecting that the resident 10 is taking a bath and notifying the unlocked state of the key based on the detection has been described, but the subject of the notification is before the resident 10 takes a bath. It can be applied not only when taking a bath, but also when the person is in a state where he / she cannot immediately respond to an illegal intruder, such as when he / she is in the toilet (motion sensor reaction) or while cooking (using a gas stove).

FIG. 13 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the fourth embodiment. Here, when the resident 10 returns home from outside the resident's house, if the door 216 is already in the unlocked state, an example of notifying that fact will be described. Although an example in which the wireless terminal 110 is built in the mobile terminal 120 is given here, it does not mean that the two are present as separate bodies.

Specifically, the key sensor 216a built in the door 216 detects the open / closed state of the door of the resident's house. Then, the communication terminal 112 built in the door 216 monitors the open / closed state of the key through the key sensor 216a, and if the key is in the unlocked state, notifies the gateway device 114 to that effect.

Here, it is assumed that the resident 10 tries to return home from outside. Then, the wireless terminal 110 built in the mobile terminal 120 is included in the communication range 202 of the gateway device 114 (a range wider than the communication range 200 described above), and the communication determination unit 184 of the gateway device 114 is a wireless terminal. Establish communication with 110 (receive RIT Data Request Frame). At this time, when the open / closed state is received from the key sensor 216a, the unlock notification unit 186 of the gateway device 114 notifies the mobile terminal 120 to that effect through the center device 118.

Here, in order to facilitate understanding, the communication range 202 of the gateway device 114 in the fourth embodiment is wider than the communication range 200 of the gateway device 114 in the other embodiment. However, the communicable ranges 200 and 202 can be adjusted by the radio wave strength of the gateway device 114 and the wireless terminal 110, and there is no problem even if the communicable range 200 is as wide as the communicable range 202.

Here, the resident 10 can grasp through the mobile terminal 120 that the door 216 is unlocked before arriving at the resident's house. In this way, the resident 10 can grasp the possibility that the trespasser exists, and can deal with the trespasser by contacting the police before opening the door 216. Here, the unlocked state of the door 216 is not always notified, but only when the mobile terminal 120 enters the communicable range 202 of the gateway device 114, that fact is notified. Therefore, locking and unlocking are unnecessary and expensive. It will be notified only when it is originally necessary, without receiving frequent notifications. Therefore, the resident 10 does not neglect the notification itself because the frequency of notification of the unlocked state is too high.

FIG. 14 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the fourth embodiment. Here, when the resident 10 goes out, if the door 216 is not locked, an example of notifying that fact will be described. Although an example in which the wireless terminal 110 is built in the mobile terminal 120 is given here, it does not mean that the two are present as separate bodies.

Specifically, the key sensor 216a built in the door 216 detects the open / closed state of the key of the door 216 of the resident's house. Then, the communication terminal 112 built in the door 216 monitors the open / closed state of the key through the key sensor 216a, and if the key is in the unlocked state, notifies the gateway device 114 to that effect.

Here, it is assumed that the resident 10 tries to go out. Then, the wireless terminal 110 built in the mobile terminal 120 is out of the communication range 202 of the gateway device 114, and the communication determination unit 184 of the gateway device 114 cancels the communication with the wireless terminal 110 (RIT Data Request Frame). Can no longer be received). At this time, when the open / closed state is received from the key sensor 216a, the unlock notification unit 186 of the gateway device 114 notifies the mobile terminal 120 to that effect through the center device 118.

Here, the resident 10 can grasp through the mobile terminal 120 that the door 216 is unlocked before moving away from the resident's house. In this way, the resident 10 can grasp that he / she has forgotten to lock the door, and can temporarily return to the resident's house in order to lock the key of the door 216. Here, the unlocked state of the door 216 is not always notified, but only when the mobile terminal 120 is out of the communicable range 202 of the gateway device 114, so that it is not necessary and expensive to lock or unlock. It will be notified only when it is originally necessary, without receiving frequent notifications. Therefore, the resident 10 does not neglect the notification itself because the frequency of notification of the unlocked state is too high.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110 is added to or instead of the gateway device 114. Another wireless terminal 110 capable of communicating may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminal capable of communicating with the wireless terminal 110 is the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminal 110 is expanded.

Further, here, the communication determination unit 184 is mentioned as the distance detection unit, the wireless terminal 110 built in the mobile terminal 120 is included in the communicable range 202 of the gateway device 114, and the communication determination unit 184 is with the wireless terminal 110. By establishing communication (receiving the RIT Data Request Frame), the return of the resident 10 was detected. However, not limited to such a case, a position detection device such as GPS detects that the distance to the wireless terminal 110 is within a predetermined range, such as detecting that the resident 10 has approached the resident's house. Various means can be used.

Further, here, an example of notifying the mobile terminal 120 when the key is in the unlocked state is given, but not only in such a case, gas may be used for a long time in the resident's house. If the gas pressure drops or something is wrong, the mobile terminal 120 may notify the user in advance before opening the door 216.

(Fifth Embodiment: Homecoming detection)
FIG. 15 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the fifth embodiment. Here, when there is a protected person 12 such as a child or an elderly person in the resident's house, an example of notifying the guardian 14 such as a child's parent or an elderly child to that effect will be described. Although an example in which the wireless terminal 110b is built in the mobile terminal 120 is given here, it does not mean that both of them exist separately.

Here, it is assumed that the protected person 12 returns home from outside and enters the resident's house, and the key 210 held by the protected person 12 also enters the resident's house. Then, the wireless terminal (first wireless terminal) 110a built in the key 210 is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 of the gateway device 114 establishes communication with the wireless terminal 110a. To do. In this way, the communication determination unit 184 determines that the wireless terminal 110a is included in the communicable range 200. In addition, the communication determination unit 184 also establishes communication with the wireless terminal (second wireless terminal) 110b built in the mobile terminal 120 owned by the guardian 14. However, here, since the guardian 14 is out, the mobile terminal 120 does not exist in the resident's house, and the communication determination unit 184 determines that the wireless terminal 110b is not included in the communicable range 200. Here, the wireless terminals 110a and 110b are associated with the protected person 12 and the guardian 14, respectively, and are configured so that they can be identified.

Then, when the communication determination unit 184 establishes communication with the wireless terminal 110a in a state where communication with the wireless terminal 110b has not been established, that is, when the guardian 14 is absent and the protected person 12 is at home, The mobile terminal 120 of the guardian 14 is notified to that effect through the center device 118.

In this way, the guardian 14 can grasp that the protected person 12 is at home through the mobile terminal 120, and can contact the protected person 12 or prepare to return home early. it can.

Here, since the notification is given only when the protected person 12 is at home while the guardian 14 is not at home, the notification is originally required without receiving unnecessary and frequent notification of the home state. It will be notified only in the case of. Therefore, the guardian 14 does not neglect the notification itself because the frequency of notification of the home state of the protected person 12 is too high.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110a, in addition to or instead of the gateway device 114, is described. Another wireless terminal 110 capable of communicating with 110b may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminals capable of communicating with the wireless terminals 110a and 110b are the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminals 110a and 110b is expanded.

Further, here, the communication determination unit 184 is mentioned as the distance detection unit, and the wireless terminal 110a built in the key 210 of the protected person 12 and the wireless terminal 110b built in the mobile terminal 120 of the guardian 14 are used. It is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 establishes communication with the wireless terminal 110a and the wireless terminal 110b (receives the RIT Data Request Frame), so that the protected person 12 and the guardian 14 The presence or absence of home is detected, but not limited to this case, the protected person 12 or guardian 14 may be present at the resident's home, such as by detecting the presence or absence of home of the protected person 12 or guardian 14 by a position detection device such as GPS. Various means for detecting the state of being at home can be used.

FIG. 16 is an explanatory diagram showing another schematic configuration of the wireless communication system 100 according to the fifth embodiment. Here, when there is a protected person 12 such as a child or an elderly person in the resident's house, if the door 216 is in the unlocked state, an example of notifying the guardian 14 such as a child's parent or an elderly child to that effect. Will be explained. Although the example in which the wireless terminal 110b is built in the mobile terminal 120 is also given here, it does not mean that both of them exist separately.

Specifically, the key sensor 216a built in the door 216 detects the open / closed state of the key of the door 216 of the resident's house. Then, the communication terminal 112 built in the door 216 monitors the open / closed state of the key through the key sensor 216a, and if the key is in the unlocked state, notifies the gateway device 114 to that effect.

Here, it is assumed that the protected person 12 returns home from outside and enters the resident's house, and the key 210 held by the protected person 12 also enters the resident's house. Then, the wireless terminal 110a built in the key 210 is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 of the gateway device 114 establishes communication with the wireless terminal 110a. In this way, the communication determination unit 184 determines that the wireless terminal 110a is included in the communicable range 200. In addition, the communication determination unit 184 also establishes communication with the wireless terminal 110b built in the mobile terminal 120 owned by the guardian 14. However, here, since the guardian 14 is out, the mobile terminal 120 does not exist in the resident's house, and the communication determination unit 184 determines that the wireless terminal 110b is not included in the communicable range 200. Here, the wireless terminals 110a and 110b are associated with the protected person 12 and the guardian 14, respectively, and are configured so that they can be identified.

Then, the unlock notification unit 186 of the gateway device 114 receives the open / closed state from the key sensor 216a, and establishes communication with the wireless terminal 110a in a state where the communication determination unit 184 has not established communication with the wireless terminal 110b. Timekeeping starts when you do. That is, while the guardian 14 is absent, the time when the protected person 12 is at home and the door 216 is in the unlocked state is timed. Then, if the open / closed state of the key detected by the key sensor 216a is the unlocked state for a predetermined time after the start of the time counting, the mobile terminal 120 of the guardian 14 is notified through the center device 118.

In this way, the guardian 14 can grasp through the mobile terminal 120 that the door 216 is unlocked even though the protected person 12 is at home, and the door 216 is in the unlocked state. You can contact the protected person 12 and prepare to return home early.

Here, the unlocked state of the door 216 is not always notified, but only when a predetermined time elapses after the protected person 12 is at home while the guardian 14 is not at home. Therefore, the notification is performed only when the notification is originally required, without the need for locking or unlocking and the frequent notification. Therefore, the guardian 14 does not neglect the notification itself because the frequency of notification of the unlocked state is too high.

Further, by notifying only when the open / closed state of the key detected by the key sensor 216a is the unlocked state for a predetermined time after the start of the time counting, the visitor visits during the predetermined time and the key There is no need to uselessly notify the unlocking even when there is a specific reason that the key is unlocked, such as when the open / closed state is changed.

Further, the guardian 14 may be able to shift the key to the locked state by using the mobile terminal 120 through the center device 118 and the gateway device 114 (remote control is performed). In this way, the guardian 14 can operate the open / closed state of the door 216 of the resident's house to make it a safe state even outside the resident's house.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110a, in addition to or instead of the gateway device 114, is described. Another wireless terminal 110 capable of communicating with 110b may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminals capable of communicating with the wireless terminals 110a and 110b are the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminals 110a and 110b is expanded.

Further, here, the communication determination unit 184 is mentioned as the distance detection unit, and the wireless terminal 110a built in the key 210 of the protected person 12 and the wireless terminal 110b built in the mobile terminal 120 of the guardian 14 are used. It is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 detects the presence or absence of the protected person 12 or the guardian 14 at home by establishing communication with the wireless terminal 110a or the wireless terminal 110b. Not limited to this, various types of detecting the home state of the protected person 12 and the guardian 14 at the resident's home, such as detecting the presence or absence of the protected person 12 and the guardian 14 at home by a position detection device such as GPS. Means can be used.

(Sixth Embodiment: Gas use detection)
FIG. 17 is an explanatory diagram showing a schematic configuration of the wireless communication system 100 according to the sixth embodiment. Here, when a protected person 12 is in the resident's house and a gas device (water heater 218, gas stove, etc.) is used, an example of notifying the guardian 14 to that effect will be described. Although an example in which the wireless terminal 110b is built in the mobile terminal 120 is given here, it does not mean that both of them exist separately.

Specifically, the gas sensor 220a built in the smart meter 220 detects the use of gas in the resident's house. Then, if the gas sensor 220a detects that the gas is in use, the communication terminal 112 built in the smart meter 220 transmits to that effect to the gateway device 114. Here, the gas sensor 220a determines whether or not the gas is in use, for example, whether or not the amount of change in gas usage exceeds the minimum amount of gas used in major gas appliances (water heater 218, gas stove, etc.). Can be detected.

Here, it is assumed that the protected person 12 is at home and the key 210 held by the protected person 12 is also in the resident's house. Then, the wireless terminal (first wireless terminal) 110a built in the key 210 is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 of the gateway device 114 establishes communication with the wireless terminal 110a. To do. In this way, the communication determination unit 184 determines that the wireless terminal 110a is included in the communicable range 200. In addition, the communication determination unit 184 also establishes communication with the wireless terminal (second wireless terminal) 110b built in the mobile terminal 120 owned by the guardian 14. However, here, since the guardian 14 is out, the mobile terminal 120 does not exist in the resident's house, and the communication determination unit 184 determines that the wireless terminal 110b is not included in the communicable range 200.

Then, the gas notification unit 188 of the gateway device 114 establishes communication with the wireless terminal 110a in a state where the communication determination unit 184 has not established communication with the wireless terminal 110b, and the gas sensor 220a determines the gas usage state. It is determined whether or not the reception is received, that is, whether or not the protected person 12 is at home and the gas is used while the guardian 14 is absent. Then, when the communication determination unit 184 establishes communication with the wireless terminal 110a and receives the gas usage state from the gas sensor 220a in a state where the communication determination unit 184 has not established communication with the wireless terminal 110b, the gas notification unit 188 centers. The mobile terminal 120 of the guardian 14 is notified through the device 118 to that effect.

In this way, the guardian 14 can grasp that the protected person 12 is at home and the gas is used through the mobile terminal 120, and that the gas is used in the gas stove or the bathroom. You can contact the protected person 12 and prepare to return home early.

Here, the gas usage status is not always notified, but only when the gas is used after the protected person 12 is at home while the guardian 14 is not at home. , It will be notified only when the notification is originally required without receiving unnecessary and frequent notification that the gas is used. Therefore, the guardian 14 does not neglect the notification itself because the frequency of notification of the gas usage state is too high.

Further, the guardian 14 may be able to stop the use of gas by using the mobile terminal 120 through the center device 118 and the gateway device 114 (remote control is performed). In this way, the guardian 14 can operate the gas usage state of the resident's house to make it a safe state even outside the resident's house.

Here, the gateway device 114 is mentioned as the reference terminal, and the gate communication section 170 is mentioned as the reference communication section. However, not only in such a case, the wireless terminal 110a, in addition to or instead of the gateway device 114, is described. Another wireless terminal 110 capable of communicating with 110b may be used as a reference terminal. In this case, another wireless terminal 110 can play a part of the function of the gateway device 114. Further, in such a configuration, the reference terminals capable of communicating with the wireless terminals 110a and 110b are the gateway device 114 and other wireless terminals 110, so that the communicable range of the wireless terminals 110a and 110b is expanded.

Further, here, the communication determination unit 184 is mentioned as the distance detection unit, and the wireless terminal 110a built in the key 210 of the protected person 12 and the wireless terminal 110b built in the mobile terminal 120 of the guardian 14 are used. It is included in the communicable range 200 of the gateway device 114, and the communication determination unit 184 establishes communication with the wireless terminal 110a and the wireless terminal 110b (receives the RIT Data Request Frame), so that the protected person 12 and the guardian 14 The presence or absence of home is detected, but not limited to this case, the protected person 12 or guardian 14 may be present at the resident's home, such as by detecting the presence or absence of home of the protected person 12 or guardian 14 by a position detection device such as GPS. Various means for detecting the state of being at home can be used.

Further, although the example of notifying the mobile terminal 120 when the gas is used is given here, the protected person 12 cannot live a normal life for some reason, and the gas is used for a predetermined period ( Notifying the mobile terminal 120 when it has not been used continuously (for example, for one week) or when the protected person 12 keeps flowing hot water and a predetermined amount of gas is continuously used. You can also.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

For example, in the above-described embodiment, the RIT method has been described as an example of communication between the wireless terminals 110 and between the wireless terminals 110 and the gateway device 114, but the present invention is not limited to this case, and various existing communication methods are used. Can be applied.

Further, in the above-described embodiment, an example in which one gateway device 114 and a plurality of wireless terminals 110 perform RIT type wireless communication has been described. However, not limited to this case, for example, as shown in FIG. 18, even if a plurality of gateway devices 114 are installed in, for example, a plurality of rooms in the resident's house, and each of the gateway devices 114 and the plurality of wireless terminals 110 perform wireless communication. Good. In this case, the plurality of gateway devices 114 may perform multi-hop wireless communication through, for example, a smart meter wireless system (U-Bus Air) that uses the 920 MHz band.

Further, as shown in FIG. 19, a gateway device 114 is built in each of the smart meters 220 of a plurality of resident homes, and the gateway device 114 and the plurality of wireless terminals 110 are allowed to perform RIT wireless communication and a plurality of smart meters 220. The gateway devices 114 of the smart meters 220 provided in the resident's home may perform wireless communication of the smart meter wireless system.

Further, in the above, the necessary components for each embodiment have been listed and their actions and effects have been described. However, for example, the wireless terminal 110, the communication terminal 112, and the mobile terminal 120 can be combined or moved across the embodiments. Instead of notifying the terminal 120, it may be notified through the speaker 214, or each component may be combined in various ways.

Further, in the above-described embodiment, each functional unit, for example, a wireless communication control unit 160, a wireless storage control unit 162, a notification control unit 164, and a battery determination unit 166 are included in the wireless terminal 110, and the gate communication control unit 180 and the gate. The storage control unit 182, the communication determination unit 184, the unlock notification unit 186, and the gas notification unit 188 have been described with reference to an example in which the gateway device 114 is included, but not limited to such a case, each functional unit fulfills its function. As long as it is included, it may be included in any device of the wireless communication system 100.

In addition, a program that causes the computer to function as the wireless terminal 110 or the gateway device 114, and a storage medium such as a computer-readable flexible disk, magneto-optical disk, ROM, CD, DVD, or BD that records the program are also provided. To. Here, the program refers to a data processing means described in an arbitrary language or description method.

The present invention can be used in wireless communication systems including mobile wireless terminals.

100 Wireless communication system 110 Wireless terminal 112 Communication terminal 114 Gateway device (reference terminal)
118 Center device 120 Mobile terminal 150 Wireless communication unit 154 Battery 164 Notification control unit 166 Battery judgment unit 170 Gate communication unit (reference communication unit)
184 Communication judgment unit 186 Unlock notification unit 188 Gas notification unit 200, 202 Communication possible range

Claims (2)

A wireless communication system in which a wireless terminal periodically attempts to transmit a RIT Data Request Frame toward a reference terminal and performs RIT-type communication.
The wireless terminal is
A wireless communication unit that is in a reception standby state for a predetermined period after transmitting the RIT Data Request Frame to the reference terminal is provided.
The reference terminal is
If there is target data to be transmitted, it will be in the reception standby state, and when the RIT Data Request Frame is received from the wireless terminal in the reception standby state, the reference communication unit that transmits the target data to the wireless terminal and
A communication determination unit that determines that communication with the wireless terminal is possible based on the RIT Data Request Frame received from the wireless terminal, and
Equipped with a,
The reference communication unit transmits target data that generates any of sound, light, and vibration to the wireless terminal.
The wireless terminal, the sound based on the target data, optical, and radio communication system, wherein Rukoto to generate any vibration. The wireless terminal is
A battery that supplies power to the wireless communication unit and
When the remaining capacity of the battery becomes equal to or less than the threshold value, the battery determination unit that transmits the fact to the reference terminal and
The wireless communication system according to claim 1, further comprising.

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