JP2018036165A - Position detecting system and mobile station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position detecting system capable of reducing power consumption as much as possible in a mobile station subjected to position detection.SOLUTION: A position detecting system comprises a fixed station 10, a mobile station 20, and a position analyzing device 30. The fixed station 10 comprises a first transmitting unit 12 which broadcast-transmits a first beacon signal by first short-range radio communication. The mobile station 20 comprises a first receiving unit 22 which receives the first beacon signal by the first short-range radio communication, and a second transmitting unit 23 which broadcast-transmits a second beacon signal by second short-range radio communication. The position analyzing device 30 comprises a second receiving unit 37 which receives the second beacon signal by the second short-range radio communication, and a position information generating unit 31 which generates information related to a position of the mobile station on the basis of information representing a reception state of the first beacon signal associated with identification information of the fixed station included in the second beacon signal.SELECTED DRAWING: Figure 1

Description

  The present invention transmits and receives beacon signals by short-range wireless communication such as Bluetooth (registered trademark, hereinafter the same) between each of one or a plurality of fixed stations fixedly arranged in a predetermined area and a mobile station. The present invention relates to a position detection system that detects the position of a mobile station and the mobile station used in such a position detection system.

  Conventionally, a position detection system as described in Patent Document 1 is known. The position detection system includes a plurality of fixed transmitters 2a, 2b, 2c, and 2d installed in a building, a portable wireless device 1 carried by a person whose position is to be detected in the building, and the building The receiving device 3 is installed at a predetermined position, and the position detecting device 4 is communicably connected to the receiving device 3. In such a position detection system, the portable wireless device 1 that receives detection signals transmitted from each of the plurality of fixed transmitters 2a, 2b, 2c, and 2d is connected to each of the fixed transmitters 2a, 2b, 2c, and 2d. The radio field intensity of the detection signal is generated as position intensity information. Then, the portable wireless device 1 transmits the position strength information to the receiving device 3, and the position strength information received by the receiving device 3 is provided to the position detecting device 4. The position detection device 4 has a database indicating the correspondence between the position strength information and the location identification information, and the location identification information corresponding to the provided location strength information is referred to the database and the portable radio 1 Is extracted as information representing the position of the person carrying the item.

  According to such a position detection system, it is possible to detect the position of a person whose position is to be detected without using the function of the GPS system. Therefore, in a building where radio waves from satellites related to the GPS system do not reach. Even if it exists, the position of the person can be detected easily.

JP 2006-308361 A

  In the conventional position detection system as described above, wireless communication is performed with each of the plurality of fixed transmitters 2a, 2b, 2c, and 2d, and reception signals from the plurality of fixed transmitters 2a, 2b, 2c, and 2d are received. A portable radio 1 (mobile station) that uses a battery as a power source for performing many processes such as measuring radio field intensity and wirelessly transmitting the measurement result as position intensity information to a receiver 3 connected to the position detector 4 It is desired to reduce power consumption. However, in this conventional position detection system, no consideration is given to power saving in wireless communication with each of the fixed transmitters 2a, 2b, 2c, and 2d and wireless communication with the receiving device 3.

  The present invention has been made in view of such circumstances, and provides a position detection system that can reduce power consumption in a mobile station that is a target of position detection as much as possible.

  The present invention also provides a mobile station used in such a position detection system.

  A position detection system according to the present invention includes one or a plurality of fixed stations fixedly arranged in a predetermined area, a mobile station that can move in the area, and a position analysis device that generates information about the position of the mobile station. Each of the one or a plurality of fixed stations has a first transmission unit that broadcasts a first beacon signal including identification information of the local station through a first short-range wireless communication, A first receiving unit that receives the first beacon signal broadcasted from the first transmitting unit of each of one or a plurality of fixed stations by the first short-range wireless communication, and the first receiving unit receives the first beacon signal. The identification information of the fixed station that is the transmission source of the first beacon signal included in the first beacon signal from each of the one or more fixed stations, and the first receiving unit of the first beacon signal A second transmission unit that broadcasts a second beacon signal that includes information indicating a reception status in a form associated with each other by second short-range wireless communication, and the position analysis device includes the mobile station Included in the second beacon signal received by the second receiver and the second receiver that receives the second beacon signal broadcast from the second transmitter of the second transmitter via the second short-range wireless communication A position information generating unit that generates the information related to the position of the mobile station based on information indicating the reception status of the first beacon signal associated with the identification information of each of the one or more fixed stations. It becomes composition.

  With such a configuration, the first beacon signal including the identification information of the own station is broadcast by the first short-range wireless communication from each of the one or a plurality of fixed stations (first transmission unit) fixedly arranged in the predetermined area. In such a situation, a mobile station (first receiving unit) that can move within the predetermined area transmits the first beacon signal broadcast from the one or more fixed stations by the first short-range wireless communication. Receive. And this mobile station (2nd transmission part) further receives the identification information of the fixed station used as the transmission source of the said 1st beacon signal contained in the said received 1st beacon signal, and the reception status of the said 1st beacon signal. The second beacon signal including the information to be expressed in a form associated with each other is broadcast by second short-range wireless communication.

  The position analysis device (second receiving unit) receives the second beacon signal broadcast from the mobile station through the second short-range wireless communication. The reception status of the first beacon signal broadcasted from the fixed station (first transmission unit) at the mobile station (first reception unit) is determined between the fixed station that is the transmission source of the first beacon signal and the mobile station. It may depend on the relative positional relationship. In the position analysis device, the reception status of the first beacon signal at the mobile station (first receiving unit) that can depend on the relative positional relationship between each of one or a plurality of fixed stations and the mobile station is determined as described above. Information about the location of the mobile station is generated based on the information to be represented.

  The information indicating the reception status of the first beacon signal at the mobile station (first receiving unit) is not particularly limited as long as it is information depending on the relative positional relationship between the fixed station and the mobile station. As information indicating the reception status of the first beacon signal at the mobile station (first receiving unit), for example, information indicating the reception strength of the first beacon signal, information indicating the propagation direction of the first beacon signal, first Information indicating whether or not a beacon signal is received can be used.

  In the position detection system according to the present invention, the second beacon signal is received by the first receiving unit of the first beacon signal associated with identification information of a fixed station that is a transmission source of the first beacon signal. Information representing strength can be included as information representing the reception status of the first beacon signal.

  With such a configuration, in the position analysis device, the first beacon signal broadcast from each of one or a plurality of fixed stations is transmitted based on information representing the reception strength at the mobile station (first receiving unit). Information about the location of the mobile station is generated.

  In the position detection system according to the present invention, a plurality of fixed stations are fixedly arranged in the predetermined area, and the second beacon signal is a predetermined number less than the total number of the fixed stations from which the first beacon signal is transmitted. Information indicating the reception strength of the first beacon signal from each of a number of fixed stations at the first receiving unit may be included as information indicating the reception status of the first beacon signal.

  With such a configuration, in the position analysis apparatus, the mobile station (first receiving unit) of the first beacon signal broadcast from each of a predetermined number of fixed stations that is smaller than the total number of the plurality of fixed stations fixedly arranged in the predetermined area. ) Is generated based on the information indicating the reception intensity at). The mobile station does not need to obtain the reception intensity of the first beacon signal broadcast from each of all the fixed stations, and the mobile station can perform efficient processing.

  In the position detection system according to the present invention, the second beacon signal is obtained from each of the predetermined number of fixed stations that are transmission sources of the first beacon signal having a higher reception intensity at the first reception unit. Information representing the reception intensity of the first beacon signal at the first receiving unit may be included as information representing the reception status of the first beacon signal.

  With such a configuration, in the position analysis apparatus, a predetermined number of fixed stations that are transmission sources of the first beacon signal having a higher reception intensity at the mobile station among a plurality of fixed stations fixedly arranged in a predetermined area. The information regarding the position of a mobile station is produced | generated based on the information showing the reception intensity | strength in the said mobile station (1st receiving part) of the said 1st beacon signal from each. When generating information on the position of the mobile station based on the reception strength of the first beacon signal broadcasted from each of a predetermined number of fixed stations less than the total number, the reception of the first beacon signal having a higher reception strength is generated. Since information related to the position of the mobile station is generated based on the information representing the strength, information related to a more reliable position of the mobile station can be obtained.

  In the position detection system according to the present invention, the second beacon signal is the first beacon from a single fixed station that is the transmission source of the first beacon signal that has the maximum reception intensity at the first receiver. Information indicating the reception intensity of the signal at the first receiving unit may be included as information indicating the reception status of the first beacon signal.

  With such a configuration, in the position analysis device, the first beacon signal from the single fixed station that is the transmission source of the first beacon signal at which the reception intensity at the mobile station (first reception unit) is maximum is obtained. Information relating to the position of the mobile station is generated based on the information indicating the reception strength.

  In the position detection system according to the present invention, the first short-range wireless communication and the second short-range wireless communication are short-range wireless communication according to different regulations even if they are short-range wireless communications according to the same regulations. May be.

  Also, from the viewpoint of power saving, at least one of the first short-range wireless communication and the second short-range wireless communication can be short-range wireless communication in accordance with Bluetooth Low Energy regulations.

  The mobile station according to the present invention scans a beacon signal in accordance with the regulations of the first short-range wireless communication, and is broadcast by the first short-range wireless communication from each of one or a plurality of fixed stations. Included in the first beacon signal when the receiving unit receives the first beacon signal including the identification information and the first beacon signal from each of the one or more fixed stations. A second beacon including identification information of a fixed station that is a transmission source of the first beacon signal and information indicating a reception status of the first beacon signal at the first receiving unit in an associated form. A transmission unit that broadcasts the signal by second short-range wireless communication.

  With such a configuration, the receiving unit scans the beacon signal in accordance with the first short-range wireless communication regulations, and the fixed station is broadcasted by the first short-range wireless communication from each of one or a plurality of fixed stations. When the first beacon signal including the first beacon signal is received, the transmission unit receives the first beacon signal and the identification information of the fixed station that is the transmission source of the first beacon signal included in the first beacon signal. The second beacon signal including information indicating the reception status at each unit in a form associated with each other is broadcast by second short-range wireless communication.

  As described above, in the device that receives the second beacon signal broadcast from the transmission unit of the mobile station by the second short-range wireless communication, the fixed station that is the transmission source of the first beacon signal in the second beacon signal. The information regarding the position of the said mobile station can be produced | generated based on the information showing the reception condition in the said mobile station (reception part) of the said 1st beacon signal included in the format matched with this identification information.

  In the mobile station according to the present invention, when the state determination unit that determines whether or not the mobile station is moving, and when the state determination unit determines that the mobile station is moving If the reception unit scans the beacon signal with the first performance level and the state determination unit determines that the mobile station is not moving, the number is less than the first performance level. It can be set as the structure which has a beacon scanning control part which makes the said receiving part scan the said beacon signal by the 2nd grade. The amount of scanning

  With such a configuration, in the state where the mobile station is moving, scanning of the beacon signal is performed with a greater degree than in the case where the mobile station is not moving, When the mobile station is moving, the first beacon signal broadcast from each of the one or more fixed stations can be received at more opportunities. As a result, the mobile station can accurately represent the position (flow line) of the mobile station that changes in accordance with the movement of the person, for example, when a person is attached to the mobile station to analyze the flow of the person. Information on the position of the can be obtained.

  In the mobile station according to the present invention, a state determination unit that determines whether or not the mobile station is stationary, and when the state determination unit determines that the mobile station is stationary, When the beacon signal is scanned by the receiving unit in the order of 1 and the state determination unit determines that the mobile station is not stationary, the second performance is less than the first performance. It can be set as the structure which has a beacon scanning control part which makes the said receiving part scan the said beacon signal to the extent.

  With such a configuration, when the mobile station is stationary, the beacon signal is scanned with a greater degree of performance than when the mobile station is not stationary. When the mobile station is stationary, the first beacon signal broadcast from each of the one or more fixed stations can be received at more opportunities. As a result, for example, when an item equipped with a mobile station is lost, the loss of the item can be determined earlier based on information regarding the position of the mobile station that does not change.

  In the mobile station according to the present invention, a state determination unit that determines whether or not the mobile station is capable of receiving the first beacon signal from one or more of the fixed stations by the reception unit; When it is determined by the state determination unit that the mobile station can receive the first beacon signal from one or a plurality of fixed stations by the reception unit, The reception unit scans the beacon signal, and the state determination unit determines that the mobile station is not in a state in which the reception unit can receive the first beacon signal from one or more of the fixed stations. The beacon scanning control unit that causes the receiving unit to scan the beacon signal with a second degree less than the first degree.

  With such a configuration, when the mobile station is not in a state where it can receive a first beacon signal from one or a plurality of fixed stations, the beacon is compared with a case where it is in a state where the first beacon signal can be received. Since the scanning of the signal is reduced, it is impossible to receive the first beacon signal from either one or a plurality of fixed stations, and to prevent unnecessary scanning of the beacon signal in a situation where the position cannot be detected. Can do. As a result, useless power consumption at the mobile station can be prevented.

  In the mobile station according to the present invention, whether or not the mobile station is capable of receiving the first beacon signal from any of the one or a plurality of fixed stations at a reception intensity equal to or higher than a predetermined threshold by the receiver. A state determination unit that determines whether or not the mobile station can receive the first beacon signal from one or a plurality of fixed stations at a reception intensity that is greater than or equal to the predetermined threshold by the reception unit. When it is determined that the mobile station is in a state, the receiver performs scanning of the beacon signal with the first degree of execution, and the mobile station determines that the mobile station has received power greater than or equal to the predetermined threshold by the receiver. When it is determined that the first beacon signal cannot be received from any of the one or a plurality of fixed stations, the receiving unit receives the second performance less than the first performance. It can be configured to have a beacon scan controller to perform scanning of bacon signals.

  With such a configuration, when the mobile station is not in a state where it can receive the first beacon signal from one or a plurality of fixed stations with a reception intensity equal to or higher than a predetermined threshold, the reception intensity equal to or higher than the predetermined threshold is used. Compared to the case where the first beacon signal can be received, the degree of scanning of the beacon signal is reduced, so that the reception intensity of the first beacon signal broadcast from each of one or a plurality of fixed stations is low. In a situation where accurate position detection is difficult, useless beacon scanning can be prevented. As a result, useless power consumption at the mobile station can be prevented.

  In the mobile station according to the present invention, whether or not the mobile station is in a state in which the reception status of the one or more first beacon signals received from the one or more fixed stations at the receiving unit changes. A state determination unit for determining, and a state in which the mobile station receives the one or a plurality of first beacon signals received from the one or a plurality of fixed stations by the state determination unit is changed. When the determination is made, the reception unit scans the beacon signal to the extent of the first execution, and the state determination unit receives the mobile station from the one or more fixed stations. When it is determined that the reception state of the first beacon signal at the receiving unit is not in a changing state, the beacon signal is scanned to the receiving unit with a second degree less than the first degree. Beacon scanning control It can be configured to have and.

  With such a configuration, the state in which the mobile station receives one or more first beacon signals received from one or more fixed stations changes in a state where such a change does not exist. Since the beacon signal is scanned with a greater degree of performance, the situation of the one or more first beacon signals changes, i.e., in the situation where the mobile station moves, one or more fixed The first beacon signal broadcast from each of the stations can be received at more opportunities. As a result, the mobile station can accurately represent the position (flow line) of the mobile station that changes in accordance with the movement of the person, for example, when a person is attached to the mobile station to analyze the flow of the person. Information on the position of the can be obtained.

  According to the position detection system of the present invention, the mobile station receives the first beacon signal by scanning at a convenient timing of the mobile station without maintaining the communication connection state with each fixed station. The second beacon signal may be broadcasted at a timing convenient to the local station without maintaining the communication connection state with the position analysis device. Power consumption can be reduced as much as possible.

  Moreover, according to the mobile station which concerns on this invention, the mobile station used with the position detection system mentioned above is realizable.

It is a figure which shows the structural example of the position detection system which concerns on one Embodiment of this invention. It is a figure which shows the state of the electromagnetic wave broadcast-transmitted in the position detection system which concerns on one Embodiment of this invention. It is a block diagram which shows the specific structural example of each fixed station in a position detection system. It is a block diagram which shows the specific structural example of the mobile station in a position detection system. It is a block diagram which shows the specific structural example of the position analysis apparatus in a position detection system. It is a figure which shows an example of the format of the information contained in the 1st beacon signal broadcast-transmitted from each fixed station. It is a figure which shows an example of the format of the information contained in the 2nd beacon signal broadcast-transmitted from a mobile station. It is a figure which shows the example of the content of the fixed station arrangement | positioning table showing the relationship between the fixed station hold | maintained at a position analyzer, and its position. It is a figure which shows the example of the content of the mobile station table which shows the relationship between the mobile station hold | maintained at a position analysis apparatus, and its carrier. It is a sequence diagram which shows an example of the propagation sequence of the 1st beacon signal and 2nd beacon signal in a position detection system. It is a timing chart which shows the scan of the 1st beacon signal in a mobile station, and the timing of the scan duty. It is a flowchart which shows the procedure of the process which concerns on reception of the 1st beacon signal in a mobile station. It is a flowchart which shows the procedure of the process which concerns on the broadcast transmission of the 2nd beacon signal in a mobile station. It is a flowchart which shows the procedure of the process which concerns on reception of the 2nd beacon signal in a position analyzer. It is a figure which shows an example of the position detection result obtained with a position analyzer. It is a figure which shows the positional relationship (the 1) with the mobile station in a position detection system, each fixed station, and a beacon receiver. It is a figure which shows the positional relationship (the 2) between the mobile station in a position detection system, each fixed station, and a beacon receiver. It is a figure which shows the positional relationship (the 3) with the mobile station in a position detection system, each fixed station, and a beacon receiver. It is a figure which shows another example of the format of the information contained in the 2nd beacon signal broadcast-transmitted from a mobile station. It is a figure which shows another example of the format of the information contained in the 2nd beacon signal broadcast-transmitted from a mobile station. It is a figure which shows another example of the position detection result obtained with the position analysis apparatus. It is a figure which shows the example of an output of the result of a flow line analysis. It is a flowchart which shows the 1st example of the control procedure of the scanning aspect of the beacon signal in a mobile station. It is a flowchart which shows the 2nd example of the control procedure of the scanning aspect of the beacon signal in a mobile station. It is a flowchart which shows the 3rd example of the control procedure of the scanning aspect of the beacon signal in a mobile station. It is a flowchart which shows the 4th example of the control procedure of the scanning aspect of the beacon signal in a mobile station. It is a flowchart which shows the 5th example of the control procedure of the scanning aspect of the beacon signal in a mobile station. It is a figure which shows the positional relationship (the 1) between the mobile station and four fixed stations in a position detection system. It is a figure which shows the positional relationship (the 2) between the mobile station and four fixed stations in a position detection system. It is a figure which shows the positional relationship (the 3) between the mobile station in a position detection system, and four fixed stations. It is a figure which shows an example of the reception intensity | strength (reception RSSI) in the mobile station of the 1st beacon signal broadcast-transmitted from each fixed station when a mobile station and four fixed stations become the positional relationship shown to FIG. 27A. It is a figure which shows an example of the reception intensity (reception RSSI) in the mobile station of the 1st beacon signal broadcast-transmitted from each fixed station when a mobile station and four fixed stations become the positional relationship shown to FIG. 27B. It is a figure which shows an example of the reception intensity (reception RSSI) in the mobile station of the 1st beacon signal broadcast-transmitted from each fixed station when a mobile station and four fixed stations become the positional relationship shown to FIG. 27C.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A position detection system according to an embodiment of the present invention is configured as shown in FIGS. This position detection system can be used, for example, as a system for analyzing a person's flow line in a room.

  1 and 2, a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f are fixedly arranged in a room 100 (region) that is an analysis range of flow line analysis. Specifically, the fixed station 10a is arranged in the vicinity of the entrance / exit 101 of the room 100, the fixed station 10b is arranged in the vicinity of the copy machine 203, the fixed station 10c is arranged in the vicinity of the first work desk group 201, and the second The fixed station 10d is arranged in the vicinity of the work desk group 202, the fixed station 10e is arranged in the vicinity of the entrance 111 of the conference room 110, and the fixed station 10f is arranged in the conference room 110 in which the conference desk 204 is placed. Further, a beacon receiving device 37 of the position analyzing device 30 described later is installed at a predetermined position in the room 100. Each of the fixed stations 10a, 10b, 10c, 10d, 10e, and 10f broadcasts a first beacon signal to be described later by short-range wireless communication in accordance with Bluetooth, in particular, Bluetooth Low Energy (hereinafter referred to as BLE). Send.

  The mobile station 20 is carried by a person who is subject to flow line analysis, and can move in the room 100 according to the movement of the person. The mobile station 20 can receive the first beacon signal broadcast from each of the fixed stations 10a, 10b, 10c, 10d, 10e, and 10f by short-range wireless communication in accordance with the BLE regulations. In addition, the mobile station 20 broadcasts a second beacon signal, which will be described later, by short-range wireless communication in accordance with BLE regulations. The beacon receiving device 37 is communicably connected to the device main body 30M of the position analyzing device 30. The beacon receiving device 37 can receive the second beacon signal broadcast from the mobile station 20 by short-range wireless communication in accordance with BLE regulations. The information (second beacon signal) received by the beacon receiving device 37 is supplied to the device main body 30M of the position analyzing device 30.

  The plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f all have the same configuration and are configured as shown in FIG. When a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f having the same configuration are described as one representative fixed station, the reference number for the fixed station is 10.

  In FIG. 3, the fixed station 10 includes a device main body 10 </ b> M and a power supply circuit 14. The apparatus main body 10M includes a control unit 11 configured by a CPU or the like, a BLE communication unit 12, and a storage unit 13. Under the control of the control unit 11, the BLE communication unit 12 performs short-range wireless communication (Bluetooth communication: first short-range wireless communication) in accordance with BLE regulations. The BLE communication unit 12 (first transmission unit) functions as a peripheral device (slave device) in Bluetooth communication, and broadcasts the first beacon signal in advertising. Further, the storage unit 13 stores information necessary for processing in the control unit 11 and information to be included in the first beacon signal to be broadcasted such as the identification number of the own station. The power supply circuit 14 converts electricity supplied from the facility of the building where the room 100 is located into appropriate electricity, and supplies predetermined power to the device main body 10M. The control unit 11, the BLE communication unit 12, and the storage unit 13 of the device main body 10 </ b> M operate with power supplied from the power supply circuit 14. Instead of the power supply circuit 14, it is also possible to supply power from the battery to the device main body 10M.

  The mobile station 20 is configured as shown in FIG. In FIG. 4, the mobile station 20 includes a device main body 20M and a battery 25. The apparatus main body 20M includes a control unit 21 configured by a CPU or the like, a first BLE communication unit 22, a second BLE unit 23, and a storage unit 24. The first BLE unit 22 performs short-range wireless communication (Bluetooth communication: first short-range wireless communication) under the control of the control unit 21 in accordance with BLE regulations. The first BLE communication unit 22 (first receiving unit / receiving unit) functions as a central side device (master device) in Bluetooth communication, and is broadcast from the fixed station 10 (BLE communication unit 12) in advertising. The first beacon signal can be received. Under the control of the control unit 21, the second BLE unit 23 performs short-range wireless communication (Bluetooth communication: second short-range wireless communication) in accordance with BLE regulations. The second BLE communication unit 23 (second transmission unit / transmission unit) functions as a peripheral side device (slave side device) in Bluetooth communication, and broadcasts a second beacon signal in advertising. In addition, the storage unit 24 stores information necessary for processing in the control unit 21, information generated by processing in the control unit 21, and the like. The battery 25 supplies power to the device main body 20M. The control unit 21, the first BLE unit 22, the second BLE unit 23, and the storage unit 24 of the device main body 20 </ b> M operate by supplying power from the battery 25.

  The position analysis device 30 is configured as shown in FIG. In FIG. 5, the position analysis device 30 includes a device main body 30 </ b> M, a power supply circuit 36, and a beacon receiving device 37 installed in a room 100. The beacon receiving device 37 (second receiving unit) functions as a central side device (master device) particularly in short-range wireless communication (Bluetooth communication: second short-range wireless communication) in accordance with the BLE regulations, and is a mobile station 20 can receive the second beacon signal broadcasted in the advertising. The device main body 30M includes a control unit 31 configured by a CPU or the like, two network communication units 32 and 33, a storage unit 34, and an operation unit 35. The control unit 31 controls the beacon receiving device 37 via the network communication unit 32 according to an operation signal corresponding to the operation of the operation unit 35, and executes various processes including a process related to the position detection of the mobile station 20. To do. One network communication unit 32 is connected to the beacon receiving device 37 via a predetermined local network, and the second beacon signal is transmitted from the beacon receiving device 37 via the local network under the control of the control unit 31. Can be received. The storage unit 34 stores information (such as a database) necessary for processing in the control unit 31, information generated by processing in the control unit 31, and the like. The other network communication unit 33 transmits / receives information to / from other devices (for example, installed in a different building from the building where the room 100 is located) via a predetermined local network under the control of the control unit 33. For example, information on the position of the mobile station 20 (person who carries it) (information on the flow line of the person) can be transmitted to the other device. The power supply circuit 36 converts electricity supplied from the facilities of the building where the room 100 is located into appropriate electricity, and supplies predetermined power to the device main body 30M. The control unit 31, the two network communication units 32 and 33, the storage unit 34, and the operation unit 35 of the device main body 30 </ b> M are operated by electric power supplied from the power supply circuit 36.

  In the first beacon signal broadcasted from the fixed station 10, for example, as shown in FIG. 6A, “fixed station” which is the type of the transmission source station, and an area where the fixed station 10 is installed is specified. Each information of “area number” and “identification number” of the own station (fixed station 10) is included. For example, as shown in FIG. 6B, the second beacon signal broadcast from the mobile station 20 includes a “sequence number” indicating the order of processing, a “mobile station” that is the type of the transmission source station, a mobile station The “area number” that identifies the area where 20 is present, the “identification number” of the local station (mobile station 20), the “identification number” of the fixed station that is the transmission source of the received first beacon signal, and the first beacon signal Each information of “Received Signal Strength Indicator” (RSSI) is included.

  The storage unit 34 of the position analysis device 30 stores, for example, a fixed station arrangement table (database) indicating the relationship between each fixed station and its position as shown in FIG. In this fixed station arrangement table, with respect to the “identification number” of each fixed station, an “area number” that identifies the area in which the fixed station is arranged, and “position (longitude / latitude)” in which the fixed station is arranged , And the “description” of the position. Further, the storage unit 34 stores a mobile station / carrying person correspondence table (database) showing the relationship between the mobile station and its carrying person as shown in FIG. In this mobile station / carried person correspondence table, the “name” of the person carrying the mobile station is associated with the “identification number” of each mobile station.

  In this position detection system, for example, as shown in FIG. 9, each of a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f (BLE communication unit 12) has its own station type (fixed station) and area. The first beacon signal including the number and the identification number (see FIG. 6A) is transmitted by a short-range wireless communication according to the BLE regulations, so that the transmission timing does not overlap with other fixed stations (for example, Broadcast transmission so as to repeat transmission for a certain period of time. In such a situation, the mobile station 20 (first BLE communication unit 22) performs scanning (scanning) of a beacon signal in accordance with BLE regulations. As shown in FIG. 10, the scanning of the beacon signal is performed by repeating scanning at a certain time Tscn at a certain interval Tint. Here, the ratio of the scanning time Tscn to the interval Tint is called a scanning duty. For example, for an interval of 100 ms (Tint = 100 ms), when the scanning time is 50 ms (Tscn = 50 ms), the scan duty is 50%, and the interval is long even with the same scanning time of 50 ms (Tscan = 50 ms). When 200 ms (Tint = 200 ms) is reached, the scan duty is small and becomes 25%. Further, even if the interval Tint (= 200 ms) becomes longer, if the scanning time Tscn becomes longer at the same rate (Tscn = 100 ms), the scanning duty does not change (50%). This scan duty represents the degree of scanning, and if the scanning duty increases, the scanning time per unit time eventually becomes long, the degree of scanning increases, and if the scanning duty decreases, the scanning duty eventually The scanning time per unit time is shortened, and the degree of scanning is reduced. The degree of scanning is the amount of scanning. If a larger amount of scanning is performed, the degree of scanning is larger. If the amount of scanning is smaller, the degree of scanning is smaller. . The degree of scanning is not particularly limited as long as it can represent the amount of scanning, for example, other than the scan duty, for example, the scanning frequency (the number of scans at a certain time within the reference time). ) And the ratio of the scanning time per unit time.

  Returning to FIG. 9, the mobile station 20 (the first BLE communication unit 22 and the control unit 21) that repeatedly performs the scanning of the beacon signal as described above starts from the fixed stations 10a, 10b, 10c, 10d, 10e, and 10f. When the first beacon signal transmitted by broadcast is received, the reception strength (RSSI) of the received first beacon signal is measured. The mobile station 20 (second BLE communication unit 23) then receives the received intensity (eg, −60 dBm, −55 dBm, −50 dBm) and the identification number (eg, A003) of the fixed station 10 that is the transmission source of the first beacon signal. , A002, A001) in a form associated with each other (see FIG. 6B). The second beacon signal is transmitted at a predetermined interval (for example, 250 ms) by short-range wireless communication (Bluetooth communication) according to BLE regulations. Repeat broadcast transmission with.

  The beacon receiving device 37 (second receiving unit) of the position analyzing device 30 scans the beacon signal at a predetermined scan duty (for example, 75%), and the second beacon signal broadcast from the mobile station 20 is transmitted. Is received, the information (see FIG. 6B) included in the second beacon signal is transmitted to the device main body 30M of the position analysis device 30. The device main body 30M (control unit 31) of the position analysis device 30 that has received the information contained in the second beacon signal refers to the fixed station arrangement table shown in FIG. Information on the position of the mobile station 20 is generated on the basis of the received position and the received intensity. Then, the position analysis device 30 (control unit 31) generates information representing the flow line of the person carrying the mobile station 20 based on the information regarding the position that changes with time.

  A more detailed operation of the above-described position detection system will be described.

  As described above, each of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is, as shown in FIG. ), The first beacon signal including each information of the area number (01: room 100) specifying the identification number (A001, A002, etc.) of the own station is used for short-range wireless communication (Bluetooth communication) in accordance with BLE regulations As a result, broadcast transmission is repeatedly performed at a unique interval (for example, determined randomly around 100 ms) so that transmission timing does not overlap with other fixed stations. In such a situation, the control unit 21 of the mobile station 20 carried by a person who can move freely in the room 100 performs processing related to reception of the first beacon signal according to the procedure shown in FIG.

  In FIG. 11, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal with a scan duty of 20% (for example, Tint = 100 ms, Tscn = 20 ms) (S11). In the process in which the first BLE communication unit 22 scans the beacon signal with a scan duty of 20% in accordance with the BLE regulations, the control unit 21 repeatedly determines whether or not the first BLE communication unit 22 has received the beacon signal. (S12). When the first BLE communication unit 22 receives a beacon signal (YES in S12), whether or not the transmission source of the received beacon signal is a fixed station based on information indicating the type of station included in the received beacon signal Is determined (S13). When the transmission source station of the received beacon signal is not a fixed station, such as a mobile station or an unrelated station (NO in S13), the received beacon signal is not related to the position detection of the mobile station. It returns to the state which determines whether the 1st BLE signal unit 22 receives the next beacon signal (S12).

  On the other hand, if the transmission source of the received beacon signal is a fixed station (YES in S13), the control unit 21 further specifies an area number for specifying an area where the transmission source fixed station included in the beacon signal is arranged. Is determined to match the area number (01) representing the room 100 that is the analysis range of the flow line analysis (S14). If the area numbers do not match (NO in S14), the control unit 21 determines that the received beacon signal is a beacon signal unrelated to the position detection of the mobile station 20, and the first BLE communication unit 22 receives the next beacon signal. (S12) returns to the state.

  Although not shown in FIG. 11, every time the first BLE communication unit 22 receives a beacon signal, the control unit 11 performs a beacon signal (first signal received by the first BLE communication unit 22 according to a known technique). 1 beacon signal) received intensity (RSSI).

  As described above, every time the first BLE communication unit 22 receives a beacon signal (YES in S12), the control unit 21 has the fixed station 10 arranged in the room 100 in which the beacon signal becomes the analysis range of the flow line analysis. It is determined whether it is from (S13, S14). If the beacon signal (YES in S12) received from the first BLE communication unit 22 is from the fixed station 10 arranged in the room 100 (YES in S13, YES in S14), the control unit 21 Using the beacon signal as the first beacon signal from the fixed station 10, the reception strength of the beacon signal at the first BLE communication unit 22 and the identification number of the fixed station that transmitted the beacon signal are paired in the storage unit 24. Save (S15).

  Thereafter, the control unit 21 determines whether or not a predetermined end condition (for example, an off operation of a switch not shown) is satisfied. If the end condition is not satisfied (NO in S16), the control unit 21 described above. The process is executed according to the procedure (S12 to S15). As a result, each time the first BLE communication unit 22 receives a beacon signal (first beacon signal) from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f, the control unit 21 The reception strength of the signal and the identification number of the source fixed station are stored in the storage unit 24 as a pair.

  The control unit 21 of the mobile station 20 performs the process related to the broadcast transmission of the second beacon signal according to the procedure shown in FIG. 12 in parallel with the process related to the reception of the first beacon signal from the fixed station 10 described above. Yes.

  In FIG. 12, the control unit 21 broadcasts to the second BLE communication unit 23 by short-range wireless communication according to the BLE specification of the second beacon signal in the format shown in FIG. 6B at a predetermined interval (for example, 250 ms). Is started (S21). In the process of broadcast transmission of the second beacon signal at a predetermined interval by the second BLE communication unit 23, the control unit 21 waits for a predetermined time (for example, 1 second) (S22), and at that time, the processing described above (FIG. 11), the maximum reception strength among the reception strengths stored in the storage unit 24 and the corresponding fixed station identification number are acquired (S23). As described above, when the maximum reception strength and the identification number corresponding to the maximum reception strength held in the storage unit 24 at that time are acquired, the control unit 21 calculates the sequence number in the content of the second beacon signal in the format shown in FIG. 6B. In addition to incrementing by +1, each information of the reception fixed station identification number and the reception strength is updated with the newly acquired maximum reception strength and the corresponding identification number (S24). As a result, the second beacon signal updated to the new content is broadcast by the second BLE communication unit 23.

  Then, the control unit 21 clears each information of the identification number and the reception intensity stored in pairs in the storage unit 24 (S25). Thereafter, according to the procedure shown in FIG. 11, the reception strength of the new first beacon signal and the identification number of the transmission source fixed station are paired and sequentially stored in the storage unit 24.

  As described above, when the contents of the storage unit 24 are cleared, the control unit 21 determines whether or not the scanning process according to the procedure shown in FIG. 11 is completed (S26). If the scanning process is not completed, the control unit 21 waits again for a predetermined time (for example, 1 second) (S22), and then at that time, the maximum received intensity stored in the storage unit 24 is obtained. The reception strength and the corresponding fixed station identification number are acquired (S23), and the content of the second beacon signal is updated using the reception strength and identification number (S24). The stored received intensity and identification number are cleared (S25). Thereafter, until the scanning process according to the procedure shown in FIG. 11 is completed, the control unit 21 repeatedly executes the process related to the update of the content of the second beacon signal according to the above-described procedure (S22 to S25).

  When the scanning process according to the procedure shown in FIG. 11 is completed (YES in S26), the control unit 21 ends the process related to the broadcast transmission of the second beacon signal.

  In the process in which the second beacon signal is broadcast from the mobile station 20, the control unit 31 of the position analysis device 30 executes processing related to reception of the second beacon signal according to the procedure shown in FIG.

  In FIG. 13, the control unit 31 causes the beacon receiving device 37 to start scanning a beacon signal at a scan duty of 75% (for example, Tint = 100 ms, Tscn = 75 ms). In the process in which the beacon receiving device 37 scans the beacon signal with a scan duty of 75% in accordance with the BLE regulations, the control unit 31 repeatedly determines whether or not the beacon receiving device 37 has received the beacon signal (S32). ). When the beacon receiving device 37 receives a beacon signal (YES in S32). Based on the information indicating the type of station included in the received beacon signal, it is determined whether or not the transmission source of the received beacon signal is a mobile station (S33). When the transmission source station of the received beacon signal is not a mobile station such as a fixed station or an irrelevant station (NO in S33), the received beacon signal is not related to the position detection of the mobile station. The beacon receiving device 37 repeatedly determines whether or not to receive the next beacon signal (S32) and returns to the state.

  On the other hand, when the transmission source of the received beacon signal is a mobile station (YES in S33), the control unit 31 further has an area number for specifying an area where the transmission source mobile station included in the beacon signal exists. Then, it is determined whether or not the area number (01) representing the room 100 that is the analysis range of the flow line analysis coincides (S34). If these area numbers do not match (NO in S34), the control unit 31 determines that the received beacon signal is a beacon signal unrelated to the position detection of the mobile station 20, and the beacon receiving device 37 determines the next beacon signal. It returns to the state which determines whether it receives (S32). On the other hand, if the area numbers match (YES in S34), that is, if the beacon signal is related to the position detection of the mobile station, the control unit 31 further changes the sequence number included in the received beacon signal. It is determined whether or not (S35). When it is determined that the sequence number has not changed and the content of the beacon signal (second beacon signal) has not changed from the content of the previously received beacon signal (second beacon signal) (NO in S35), the control unit 31 returns to the state in which the beacon receiving device 37 determines whether or not to receive the next beacon signal (S32).

  Thus, every time the beacon receiving device 37 receives a beacon signal (YES in S32), the control unit 31 receives the beacon signal from the mobile station 20 that moves in the room 100 that is the analysis range of the flow line analysis. It is determined whether or not the content includes new contents (S33, S34, S35). If the beacon signal received by the beacon receiving device 37 (YES in S32) is a new content from the mobile station 20 moving in the room 100 (YES in S33, YES in S34, YES in S35) ), The control unit 31 uses the beacon signal as a second beacon signal having new contents from the mobile station 20, and fixes the transmission source of the first beacon signal from the beacon signal (second beacon signal: see FIG. 6B). The station identification number is acquired (S36).

  The control unit 31 refers to the fixed station arrangement table shown in FIG. 7 and the mobile station / carrying person correspondence table shown in FIG. Based on information on the position of the station, for example, the position (latitude / longitude) where the fixed station is installed, the carrying person corresponding to the identification number of the mobile station 20 (included in the second beacon signal: see FIG. 6B) The latest position information is updated (S37). Thereafter, the control unit 31 repeats the process according to the above-described procedure (S32 to S37) until a predetermined end condition is satisfied, for example, an end operation is performed by the operation unit 35. Thereby, the position information of the person carrying the mobile station 20 is sequentially updated.

  In this position detection system (flow line analysis system), an identification number is assigned to the mobile station 20, and the second beacon signal broadcast from the mobile station 20 includes the identification number of the source mobile station 20. (See FIG. 6B). With this identification number, the mobile station that is the transmission source of the second beacon signal received by the beacon receiving device 37 can be specified. Therefore, even if there are a plurality of mobile stations 20 in the room 100 that is the analysis range of the flow line analysis, the position analysis device 30 can distinguish and acquire information regarding the positions of the plurality of mobile stations 20. In the position analysis device 30, the correspondence relationship between each of the plurality of mobile stations and the carrier is managed by the mobile station / carrier correspondence table shown in FIG. Position information of a plurality of people (carrying people of the mobile station 20) can be distinguished and detected (flow line analysis). For example, the control unit 31 can specify the positions of a plurality of carriers of the mobile station 20 by the position (latitude / longitude) of the fixed station 10 together with the confirmation time, as shown in FIG.

  In the above-described example, the mobile station 20 identifies the fixed station identification number corresponding to the maximum reception strength among the reception strengths of the first beacon signal from the fixed station 10 received in a certain period (1 second in the example of FIG. 12). Is included in the second beacon signal. The reception intensity of the first beacon signal depends on the distance between the mobile station 20 and the fixed station 10, and the first beacon signal having the maximum reception intensity is from the fixed station 10 closest to the mobile station 20. . Therefore, in the position detection system described above, the position of the fixed station 10 closest to the mobile station 20 is acquired as information regarding the position of the mobile station 20.

  For example, as shown in FIG. 15, when the person who is the subject of the flow line analysis (the person carrying the mobile station 20) is near the copy machine 203, the position of the fixed station 10 b arranged near the copy machine 203 (for example, , Latitude / longitude) is recorded as the position of the person, and as shown in FIG. 16, when the person who is the subject of flow line analysis (the person carrying the mobile station 20) is near the second work desk group 202, The position (for example, latitude / longitude) of the fixed station 10d arranged in the vicinity of the two work desk group 202 is recorded as the position of the person. Furthermore, as shown in FIG. 17, when a person who is subject to flow line analysis (a person carrying the mobile station 20) is in the conference room 110, the position (for example, latitude) of the fixed station 10 f arranged in the conference room 110. (Longitude) is recorded as the person's position.

  The position analysis device 30 (control unit 31) can obtain flow line information representing a change in the position of the person carrying the mobile station 20 based on the information on the position (detection position) of the person carrying the mobile station 20. For example, in the case of the example of FIGS. 15 to 17, in a certain time zone, a route from the vicinity of the copy machine 203 in the room 100 to the vicinity of the second work desk group 202 and then into the conference room 110 is analyzed. It can be obtained as flow line information representing the flow line of the subject.

  In addition, the position analysis device 30 is, under the control of the control unit 31, position information detected for a person who is the subject of the flow line analysis obtained as described above, or a flow line representing the flow line. Under the control of the control unit 31, the information can be distributed to other devices via the predetermined local network by the network communication unit 33.

  In the position detection system as described above, the mobile station 20 does not maintain the state of communication connection with each of the fixed stations 10a, 10b, 10c, 10d, 10e, and 10f, and the convenient timing ( The first beacon signal may be received by scanning at a certain scan duty), and a convenient timing of the own station is maintained without maintaining the communication connection state with the position analysis device 30 (beacon receiving device 37). Since it is only necessary to broadcast the second beacon signal at a certain interval, it is possible to reduce the power consumption in the mobile station 20 that is the position detection target as much as possible.

  In the above-described example, the position (latitude / longitude) of the fixed station 10 (maximum reception intensity) closest to the mobile station 20 (target person of flow line analysis) is detected as the position of the mobile station 20. The expression of the position of (the subject of the flow line analysis) is not limited to this. For example, “near the copier 203”, “near the second work desk group 202”, “in the conference room 110”, and the like. It is also possible to express the position of the mobile station 20 (target person of flow line analysis).

  In addition, the latitude and longitude of the mobile station 20 can be detected. In this case, the second beacon signal includes the reception strength of the first beacon signal from the plurality of fixed stations 10. The reception strength of the first beacon signal from all (for example, six) fixed stations 10a, 10b, 10c, 10d, 10e, and 10f and the identification number of the fixed station that is the transmission source of the first beacon signal Although it may be included in the beacon signal, for example, as shown in FIG. 18, among the total number (for example, six) of the fixed stations 10a, 10b, 10c, 10d, 10e, 10f, the first to the predetermined number The reception intensity of the first beacon signal received by (for example, the third) and the identification number of the corresponding fixed station can be included in the second beacon signal. In this case, generation of the second beacon signal and broadcast transmission are performed when the first beacon signals from a smaller number of fixed stations are received without waiting for reception of the first beacon signals from the total number of fixed stations. And efficient processing at the mobile station 20 becomes possible. Further, for example, as shown in FIG. 19, among all (for example, six) fixed stations 10 a, 10 b, 10 c, 10 d, 10 e, 10 f, a predetermined source serving as a transmission source of the first beacon signal having a higher reception strength The reception intensity of the first beacon signal from each of a number of (for example, three) fixed stations and the identification number of the fixed station can be included in the second beacon signal. In this case, when generating information on the position of the mobile station 20 based on the reception intensity of the first beacon signal broadcast from each of the predetermined number (three) of fixed stations smaller than the total number (six), Since the information regarding the position of the mobile station 20 is generated based on the information indicating the reception intensity of the first beacon signal having a higher reception intensity, the information regarding the more reliable position of the mobile station 20 can be obtained.

  In the position analysis device 30 (control unit 31) that receives the second beacon signal including the reception strength of the first beacon signal from the plurality of fixed stations as described above, the first beacon from each fixed station is obtained by a known method. Based on the received signal strength, the distance between the mobile station 20 and each fixed station is calculated. Then, based on the position (latitude / longitude) of each fixed station (see the fixed station arrangement table shown in FIG. 7) and the calculated distance between the mobile station 20 and each fixed station, this is also moved according to a known method. The position (latitude / longitude) of the station 20 is calculated. In this case, for example, as shown in FIG. 20, the position of the carrier (Taro Tanaka: see FIG. 8) of a certain mobile station 20 (A001: see FIG. 8) is obtained as latitude / longitude corresponding to the detection time. be able to. In this case, the position (latitude / longitude) of the mobile station 20 (the subject of the flow line analysis) at each time can be plotted as a dot, for example, as shown in FIG. The flow line in the subject's room 100 can be analyzed by the set of dots.

  In the position detection system described above, the mobile station 20 constantly scans the first beacon signal broadcast from each fixed station 10a, 10b, 10c, 10d, 10e, 10f with a scan duty of 20%. From the viewpoint of power saving of the mobile station 20 and an increase in the reception opportunity of the first beacon signal, the scan duty (degree of scanning) in the mobile station 20 can be controlled.

  First, the scan duty can be changed depending on whether or not the mobile station 20 is actually moving. In this case, the control unit 21 of the mobile station 20 controls the scan duty according to the procedure shown in FIG.

  In FIG. 22, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal with a scan duty of 20% (for example, Tint = 100 ms, Tscn = 20 ms) (S41). Thereafter, the control unit 21 determines whether or not the internal one-minute timer is operating and has timed out (S42). If the one-minute timer is not operating, or if it is operating but has not timed out (NO in S42), the control unit 21 receives, for example, an acceleration sensor (not shown) provided in the moving body 20. It is determined whether or not the mobile station 20 is moving based on the detection signal (S43: state determination unit). If the mobile station 20 is not moving (NO in S43), the control unit 21 starts a one minute timer (S44). Thereafter, the control unit 21 confirms that the one-minute timer has not timed out (NO in S42), and confirms that the mobile station S43 is not in a moving state (NO in S43). The operation of the minute timer is maintained (S44). When the mobile station 20 is not in a moving state, the same processing is repeated (NO in S42, NO in S43, S44), and the scan duty in scanning of the beacon signal by the first BLE communication unit 22 is 20%. (About the second performance). When the operating one-minute timer times out (YES in S42), the control unit 21 further causes the first BLE communication unit 22 to maintain beacon scanning at a scan duty of 20% (about the second performance). (S45). After that, the control unit 21 confirms again that the one-minute timer is not operating (NO in S42), and confirms that the mobile station 20 is not moving (NO in S43), the one-minute timer Is started (S44). Then, the control unit 21 (beacon scanning control unit) repeatedly executes the same processing, so that the mobile station 20 is not moving, and the scan duty by the first BLE communication unit 2 is 20% (about the second performance). The scanning of the beacon signal is continued.

  In the process, when the mobile station 20 starts moving (YES in S43), the control unit 21 stops the one minute timer (S46), and sets the scan duty to 75% (for example, Tint = 100 ms, Tscn = 75 ms). Update (S47: beacon scanning control unit). As a result, the first BLE communication unit 20 performs scanning of the beacon signal broadcast-transmitted from the fixed station 10 by increasing the degree of scanning with a scan duty of 75% (about the first level). Thereafter, in a state where the mobile station 20 is moving (YES in S43), the control unit 21 (beacon scanning control unit) confirms that the one-minute timer is stopped and the mobile station 20 is moving. While (NO in S42, YES in S43), the scan duty is maintained at 75% (about the first level) while the one-minute timer is stopped (S46) (S47).

  When the mobile station 20 stops again (NO in S43), the control unit 20 starts a one-minute timer (S44) and maintains the scan duty at 75% until the one-minute timer times out (NO in S42, S43). NO, S44). As a result, the scanning of the beacon signal by the first BLE communication unit 22 is continued for one minute after the mobile station 20 stops again. When the one-minute timer times out (YES in S42), the control unit 21 updates the scan duty to 20% (second execution level) (S45), whereby the first BLE communication unit 22 The beacon signal is scanned at 20% (about the second level).

  Thereafter, by repeating the same processing, when the mobile station 20 is moving, the first BLE communication unit 22 scans the beacon signal at a scan duty of 75% (about the first level). One minute after 20 stops, the scan duty is switched to 20%, and the first BLE communication unit 22 scans the beacon signal at a scan duty of 20% (about the second level).

  According to the control of the scan duty as described above, when the mobile station 20 is moving, the scan duty is larger (more performance) than when the mobile station 20 is not moving. Since the beacon signal is scanned, the first beacon signal broadcast from each of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f when the mobile station 20 is moving. Can be received on more occasions. As a result, for example, when a mobile station 20 is attached to a person and the flow line of the person is analyzed, the movement that can accurately represent the position (flow line) of the mobile station that changes in accordance with the movement of the person. Information about the location of the station 20 can be obtained.

  Second, the scan duty can be changed depending on whether or not the mobile station 20 is actually stationary. In this case, the control unit 21 of the mobile station 20 controls the scan duty according to the procedure shown in FIG.

  In FIG. 23, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal at a scan duty of 5% (for example, Tint = 100 ms, Tscn = 5 ms) (S51). Thereafter, the control unit 21 determines whether or not the internal one minute timer is operating and timed out (S52). If the one-minute timer is not operating, or has been operating but has not timed out (NO in S52), the control unit 21 may receive an acceleration sensor (not shown) provided in the moving body 20, for example. It is determined whether or not the mobile station 20 is stationary based on the detection signal (S53: state determination unit). If the mobile station 20 is not stationary (NO in S53), that is, if the mobile station 20 is moving, the control unit 21 maintains the scan duty at 5% (S54), 1 minute. The timer is kept stopped (S55). Then, the control unit 21 (beacon scanning control unit) confirms that the mobile station 20 is not stationary (NO in S53) while confirming that the one-minute timer is not operating (NO in S52). ), The scan duty is maintained at 5% (S54), and the one minute timer is stopped (S55). Thereby, when the mobile station 20 is not in a stationary state (moving), the first BLE communication unit 22 scans the beacon signal with a scan duty of 5% (about the second level).

  In the process, when the mobile station 20 is stationary (YES in S53), the control unit 21 determines whether or not the current time point is 10 seconds from the start of stationary of the mobile station 20 (allowing a predetermined error) ( S56). If the current time is not 10 seconds from the start of stationary (NO in S56), the control unit 21 confirms that the one-minute timer is not operating (NO in S52), and that the mobile station 20 is stationary. (YES in S53), while confirming that the current time point is not 10 seconds after the stationary of the mobile station 20 (NO in S56), the scan duty is maintained at 5% (about the second level). When the current time point is 10 seconds from the start of stationary of the mobile station 20 (YES in S56), the control unit 21 updates the scan duty to 75% (for example, Tint = 100ms, Tscn = 75ms) (S57). 1 minute timer is started (S58). Thereafter, the control unit 21 (beacon scanning control unit) confirms that the one-minute timer has not timed out (NO in S52), confirms that the mobile station 20 is stationary (YES in S53), While confirming that it is not 10 seconds from the start of stationary of the mobile station 20 (NO in S56), the scan duty is maintained at 75% (about the first level). As a result, the second BLE communication unit 22 scans the beacon signal at a scan duty of 75% (about the first level).

  In the above process, when the one-minute timer times out (YES in S52), the control unit 21 returns the scan duty to 5% (second execution level) (S59), and the first BLE communication unit 22 has a scan duty of 5%. To scan the beacon signal. Thereafter, the control unit 21 confirms that the one-minute timer that has already timed out is not in operation while the mobile station 20 remains stationary (NO in S52), and that the mobile station 20 is stationary. The scan duty is maintained at 5% while repeatedly confirming (YES in S53) and repeatedly confirming that the current time is not 10 seconds from the start of stationary of the mobile station 20 (NO in S56). Thus, the first BLE communication unit 22 continuously scans the beacon signal with a scan duty of 5% while the mobile station 20 remains stationary even after the one-minute timer times out.

  In this way, in a situation where the mobile station 20 is stationary and the first BLE communication unit 22 is scanning the beacon signal with a scan duty of 5%, the mobile station 20 resumes moving (NO in S53). ), The control unit 21 maintains the scan duty of 5% (NO in S54, S55, S52, NO in S53).

  When the mobile station 20 is stationary (YES in S53), the scan duty is maintained at 75%, and the mobile station resumes movement before the one-minute timer times out (NO in S53), the control unit 21 Switches the scan duty to 5%, and causes the first BLE communication unit 22 to scan the beacon signal at the scan duty of 5%.

  According to the control of the scan duty as described above, when the mobile station 20 is moving, the beacon signal is scanned at a scan duty of 5%, and when the mobile station 20 is stationary, after waiting for 10 seconds. During the first minute, the scan of the beacon signal is performed with a scan duty of 75%, and then the scan returns to the scan of the beacon signal with a scan duty of 5%. As a result, for example, when an item equipped with the mobile station is lost, when the mobile station 20 is stationary (lost state), the beacon signal is scanned at a larger scan duty of 75% (first degree of execution). This is done to ensure that the information relating to the location of the lost item is obtained. Then, after a time (approximately one minute later) when it can be considered that the information relating to the position has been reliably acquired, the scan returns to the scan with the original smaller scan duty of 5% (second execution level). Therefore, useless power consumption at the mobile station 20 can be prevented.

  Third, the mobile station 20 scans depending on whether the first BLE communication unit 22 can receive the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f. The duty can be changed. In this case, the control unit 21 of the mobile station 20 controls the scan duty according to the procedure shown in FIG.

  In FIG. 24, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal with a scan duty of 5% (S61). Thereafter, the control unit 21 determines whether or not the internal 5-minute timer is operating and has timed out (S62). If the five-minute timer is not operating, or is operating but has not timed out (NO in S62), the control unit 21 uses the first BLE communication unit 22 to make a plurality of fixed stations 10a, 10b, 10c, 10d, It is determined whether or not the first beacon signal from any of 10e and 10f is received (S63: state determination unit). If the first BLE communication unit 22 receives the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f (YES in S63), the control unit 21 is 5 The state in which the minute timer is stopped is maintained (S64), and the scan duty is updated to 50% (for example, Tint = 100 ms, Tscn = 50 ms) (S65). Then, the control unit 21 (beacon scanning control unit) confirms that the 5-minute timer is not operating (NO in S62), and the plurality of fixed stations 10a, 10b, 10c, 10d, 10e by the 1BLE communication unit 22. Each time it is confirmed that the first beacon signal from any one of 10f is received (YES in S63), the 5-minute timer is stopped (S64), and the scan duty is maintained at 50%. (S65). Thus, in a situation where the first BLE communication unit 22 receives the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f, the first BLE communication unit 21 has a scan duty of 50. The beacon signal is scanned at% (about the first level).

  In the process, the mobile station 20 leaves the area of the flow line analysis (room 100), etc., and the first BLE communication unit 22 causes the fixed station 10a, 10b, 10c, 10d, 10e, 10f. If the first beacon signal is not received (NO in S63), the control unit 21 starts a 5-minute timer (S66). Then, the control unit 21 confirms that the 5-minute timer has not timed out while maintaining the scan duty at 50% (NO in S62), and the first BLE communication unit 22 causes the plurality of fixed stations 10a, 10b, While confirming that the first beacon signal is not received from any of 10c, 10d, 10e, and 10f (NO in S63), the operation of the 5-minute timer is maintained (S66). Thereby, the BLE communication unit 21 maintains the scanning of the beacon signal with a scan duty of 50%.

  When the 5-minute timer times out (YES in S62), the control unit 21 updates the scan duty to 5% (about the second level) (S67). Thereby, the BLE communication unit 21 starts scanning the beacon signal with a scan duty of 5%. Thereafter, in a situation where the first beacon signal is not received from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f by the first BLE communication unit 22 (NO in S63), the control unit 21 (beacon scanning control) Part) keeps the scan duty at 5% while repeating the start of the 5-minute timer (S66) and the confirmation of timeout (YES in S62). As a result, in a situation where the first BLE communication unit 22 does not receive the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f, the first BLE communication unit 10 has a scan duty of 5%. The beacon signal is scanned at (about the second level).

  According to the scan duty control as described above, when the mobile station 20 cannot receive the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f, Compared to the case where one beacon signal can be received, the scan duty (degree of execution) related to the scanning of the beacon signal is small, so from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f. In the situation where the first beacon signal cannot be received and the position cannot be detected, it is possible to prevent unnecessary scanning of the beacon signal. As a result, useless power consumption at the mobile station can be prevented.

  Fourth, the mobile station 20 can receive the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f at the reception intensity equal to or higher than a predetermined threshold by the first BLE communication unit 22. The scan duty can be changed depending on whether or not. In this case, the control unit 21 of the mobile station 20 controls the scan duty according to the procedure shown in FIG.

  In FIG. 25, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal with a scan duty of 5% (S71). Thereafter, the control unit 21 determines whether or not the internal 5-minute timer is operating and has timed out (S72). If the five-minute timer is not operating, or is operating but has not timed out (NO in S72), the control unit 21 uses the first BLE communication unit 22 to make a plurality of fixed stations 10a, 10b, 10c, 10d, It is determined whether the reception intensity of the first beacon signal from any of 10e and 10f is greater than the threshold (S73: state determination unit). If the reception intensity of the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is greater than the threshold by the first BLE communication unit 22 (YES in S73), the control unit 21 Maintains the state where the 5-minute timer is stopped (S74), and updates the scan duty to 50% (S75). Then, the control unit 21 (beacon scanning control unit) confirms that the 5-minute timer is not operating (NO in S72), and the first BLE communication unit 22 causes the plurality of fixed stations 10a, 10b, 10c, 10d, Each time it is confirmed that the reception intensity of the first beacon signal from any of 10e and 10f is larger than the threshold (YES in S73), the 5-minute timer is stopped (S74), and the scan duty is maintained at 50%. (S75). Thereby, in the situation where the reception intensity of the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is larger than the threshold by the first BLE communication unit 22, the first BLE communication unit 21 The beacon signal is scanned at a scan duty of 50% (about the first level).

  In the process, the first BLE communication unit 22 causes the mobile station 20 to move out of the flow line analysis area (room 100), etc., from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f. When the reception intensity of one beacon signal is not greater than the threshold (NO in S73), the control unit 21 starts a 5-minute timer (S76). Then, the control unit 21 confirms that the 5-minute timer has not timed out while maintaining the scan duty at 50% (NO in S72), and the first BLE communication unit 22 causes the plurality of fixed stations 10a, 10b, While confirming that the reception intensity of the first beacon signal from any of 10c, 10d, 10e, and 10f is not greater than the threshold (NO in S73), the operation of the 5-minute timer is maintained (S76). Thereby, the BLE communication unit 21 maintains the scanning of the beacon signal with a scan duty of 50%.

  When the 5-minute timer times out (YES in S72), the control unit 21 updates the scan duty to 5% (about the second level) (S77). Thereby, the BLE communication unit 21 starts scanning the beacon signal with a scan duty of 5%. Thereafter, in a situation where the reception intensity of the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is not greater than the threshold (NO in S73), the control unit 21 The beacon scanning control unit maintains the scan duty at 5% while repeating the start of the 5-minute timer (S76) and the confirmation of timeout (YES in S72). Thereby, in the situation where the reception intensity of the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f is not greater than the threshold by the first BLE communication unit 22, the first BLE communication unit 10 The beacon signal is scanned at a scan duty of 5% (about the second level).

  According to the scan duty control as described above, the mobile station 20 is in a situation where the reception intensity of the first beacon signal from any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f is not greater than the threshold. Compared to the situation where the reception intensity of the first beacon signal is greater than the threshold value, the scan duty (degree of execution) related to scanning of the beacon signal is small, so any of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f In the situation where the reception intensity of the first beacon signal from is not greater than the threshold value and it is difficult to accurately detect the position, it is possible to prevent unnecessary scanning of the beacon signal. As a result, useless power consumption at the mobile station can be prevented.

  Fifth, the mobile station 20 is in a state where the reception status of the first BLE communication unit 22 of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f changes. The scan duty can be changed depending on whether or not. In this case, the control unit 21 of the mobile station 20 controls the scan duty according to the procedure shown in FIG.

  In FIG. 26, the control unit 21 causes the first BLE communication unit 22 to start scanning a beacon signal with a scan duty of 5% (S81). Thereafter, the control unit 21 determines whether or not the internal 5-minute timer is operating and has timed out (S82). If the 5-minute timer is not operating, or is operating but has not timed out (NO in S82), the control unit 21 is received from a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, 10f. It is determined whether the state of reception of the plurality of first beacon signals at the first BLE communication unit 22 is changed (S83: state determination unit).

  For example, when the mobile station 20 is located near the copy machine 203 as shown in FIG. 27A, the fixed station 10a (A001), the fixed station 10b (A002), the fixed station 10c (A003), and the fixed station 10d ( The reception intensity at the first BLE communication unit 22 of the first beacon signal broadcasted from (A004) is as shown in FIG. 28A, for example. In this case, the order of the fixed stations that broadcast the first beacon signal that is received with higher reception strength is fixed station 10b (A002), fixed station 10a (A001), fixed station 10c (A003), and fixed station 10d ( A004).

  For example, when the mobile station 20 is located in the vicinity of the second work desk group 202 as shown in FIG. 27B, the fixed station 10a (A001), the fixed station 10b (A002), the fixed station 10c (A003), and the fixed station 10d. The reception intensity at the first BLE communication unit 22 of the first beacon signal broadcast from (A004) is, for example, as shown in FIG. 28B. In this case, the order of the fixed stations that broadcast the first beacon signal received with a higher reception strength is the fixed station 10a (A001), the fixed station 10d (A004), the fixed station 10b (A002), and the fixed station 10c ( A003).

  Further, for example, when the mobile station 20 is located in the vicinity of the doorway 101 as shown in FIG. 27C, the fixed station 10a (A001), the fixed station 10b (A002), the fixed station 10c (A003), and the fixed station 10d ( The reception intensity at the first BLE communication unit 22 of the first beacon signal broadcasted from (A004) is, for example, as shown in FIG. 28C. In this case, the order of the fixed stations that broadcast the first beacon signal received with a higher reception strength is the fixed station 10a (A001), the fixed station 10d (A004), the fixed station 10b (A002), and the fixed station 10c ( A003).

  For example, when the mobile station 20 moves from the position shown in FIG. 27A to the position shown in FIG. 27B, the first BLE communication of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f. The situation of reception at the unit 22 changes from the situation shown in FIG. 28A to the situation shown in FIG. 28B. In this case, the order of the fixed stations of the transmission source of the first beacon signal having a higher reception strength has changed. Also, for example, when the mobile station 20 moves from the position shown in FIG. 27B to the position shown in FIG. 27C, the first beacon signals of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f. The reception status in the 1BLE communication unit 22 changes from the status shown in FIG. 28B to the status shown in FIG. 28C. In this case, the order of the fixed stations that are the transmission sources of the first beacon signal having the higher reception strength does not change, but the reception strength of the beacon signal from each fixed station is changed.

  Returning to FIG. 26, for example, as described above (see FIGS. 27A to 27C and FIGS. 28A to 28C), a plurality of first received from a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f. If the state of reception of the beacon signal at the first BLE communication unit 22 changes (YES in S83), the control unit 21 maintains the state where the 5-minute timer is stopped (S84), and sets the scan duty to 50. (S85). Then, the control unit 21 (beacon scanning control unit) receives signals from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f while confirming that the 5-minute timer is not operating (NO in S82). Each time the state of reception of the plurality of first beacon signals at the first BLE communication unit 22 is confirmed (YES in S83), the 5-minute timer is stopped (S84), and the scan duty is set to 50%. (S85). Thereby, in a state where the reception status of the first BLE communication unit 22 of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f changes, the first BLE communication unit 21 Scans the beacon signal at a scan duty of 50% (about the first level).

  In the process, the movement of the mobile station 20 stops and the relative positional relationship between the mobile station 20 and each fixed station does not change, and a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, When the status of reception of the first beacon signals received from 10f at the first BLE communication unit 22 is not changed (NO at S83), the control unit 21 starts a 5-minute timer (S86). Then, the control unit 21 confirms that the 5-minute timer has not timed out while maintaining the scan duty at 50% (NO in S82), a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, The operation of the 5-minute timer is maintained while confirming that the reception status of the first beacon signals received from 10f at the first BLE communication unit 22 is not in a changing state (NO at S83) (S86). ). Thereby, the BLE communication unit 21 maintains the scanning of the beacon signal with a scan duty of 50%.

  When the 5-minute timer times out (YES in S82), the control unit 21 updates the scan duty to 5% (about the second level) (S87). Thereby, the BLE communication unit 21 starts scanning the beacon signal with a scan duty of 5%. After that, when the status of reception at the first BLE communication unit 22 of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is not changed (NO at S83) Then, the control unit 21 (beacon scanning control unit) maintains the scan duty at 5% while repeating the start of the 5-minute timer (S86) and the confirmation of timeout (YES in S82). As a result, when the reception status of the first BLE communication unit 22 of the plurality of first beacon signals received from the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is not changed, The 1BLE communication unit 10 scans the beacon signal with a scan duty of 5% (about the second level).

  According to the scan duty control as described above, the reception status of the plurality of first beacon signals received by the mobile station 20 from the plurality of fixed stations 10a, 10b, 10c, 10d, 10d, 10e, and 10f changes. In the state, since the beacon signal is scanned with a larger scan duty (more degree of execution) than in the case where there is no such change, the plurality of first beacon signals When the situation changes, that is, when the mobile station 20 moves, the first beacon signal broadcast from each of the plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f is received at more opportunities. be able to. As a result, the mobile station can accurately represent the position (flow line) of the mobile station that changes in accordance with the movement of the person, for example, when a person is attached to the mobile station to analyze the flow of the person. Information on the position of the can be obtained.

  In each example described above, the reception strength (RSSI) of the first beacon signal at the mobile station 20 is used as the information indicating the reception status of the first beacon signal. If the information depends on the relative positional relationship with the station 10, information indicating the other reception status of the first beacon signal, for example, information indicating the direction of the fixed station viewed from the mobile station, or information viewed from the fixed station. It may be information indicating the direction of the mobile station.

  In each example described above, an example in which a plurality of fixed stations 10a, 10b, 10c, 10d, 10e, and 10f are installed is shown. However, a single fixed station may be installed. In this case, the information regarding the position of the mobile station 20 can be expressed as a distance based on the fixed station.

  Furthermore, in the above-described example, the beacon receiving device 37 of the position analysis device 30 is configured separately from the device main body 30M and connected to the device main body 30M via the local network (FIGS. 1 and 2). However, it is not limited to such a configuration. For example, the beacon receiving device 37 is included in the device main body 30M, and the device main body 30M is provided in the room 100 (region) so that the second beacon signal from the mobile station 20 can be received by the beacon receiving device 37. It may be.

  As mentioned above, although some embodiment of this invention and the modification of each part were described, this embodiment and the modification of each part are shown as an example, and are not intending limiting the range of invention. . These novel embodiments described above can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention and included in the invention described in the claims.

  In the above-described example, in the mobile station 20, the first BLE communication unit 22 and the second BLE communication unit 23 perform short-range wireless communication in accordance with the BLE regulations which are the same short-range wireless communication regulations. The two communication units 22 and 23 may perform information communication by different short-range wireless communication, or may perform information communication by short-range wireless communication according to a rule other than BLE. .

  The position detection system according to the present invention has an effect that power consumption in a mobile station that is a position detection target can be reduced as much as possible, and each of one or a plurality of fixed stations fixedly arranged in a predetermined area. It is useful as a position detection system that detects the position of the mobile station by transmitting and receiving a beacon signal between the mobile station and the mobile station by short-range wireless communication.

10a to 10f Fixed station 11, 21, 31 Control unit 12 BLE communication unit 13, 24, 34 Storage unit 14, 36 Power supply circuit 20 Mobile station 22 First BLE communication unit 23 Second BLE communication unit 25 Battery 30 Position analysis device 32, 33 Network communication unit 35 Operation unit 37 Beacon receiving apparatus 100 Room 101 Entrance / exit 110 Conference room 111 Entrance / exit of conference room 201 First work desk group 202 Second work desk group 203 Copy machine 204 Conference machine

Claims (15)

One or more fixed stations fixedly arranged in a predetermined area;
A mobile station movable in the region;
A position analysis device that generates information about the position of the mobile station,
Each of the one or more fixed stations is
A first transmission unit that broadcasts a first beacon signal including identification information of the local station by first short-range wireless communication;
The mobile station
A first receiver that receives the first beacon signal broadcast from the first transmitter of each of the one or more fixed stations by the first short-range wireless communication;
Identification information of a fixed station that is a transmission source of the first beacon signal included in the first beacon signal from each of the one or a plurality of fixed stations received by the first receiver, and the first beacon A second transmission unit that broadcast-transmits a second beacon signal including the information indicating the reception status of the signal at the first reception unit in a form associated with each other by second short-range wireless communication,
The position analysis device
A second receiver that receives the second beacon signal broadcast from the second transmitter of the mobile station by the second short-range wireless communication;
Based on the information indicating the reception status of the first beacon signal associated with the identification information of each of the one or more fixed stations included in the second beacon signal received by the second receiving unit. A position detection system comprising: a position information generation unit that generates the information related to the position of a mobile station.   The second beacon signal includes information indicating the reception strength at the first receiving unit of the first beacon signal associated with identification information of a fixed station that is a transmission source of the first beacon signal. The position detection system according to claim 1, wherein the position detection system includes information representing a signal reception state. A plurality of fixed stations are fixedly arranged in the predetermined area,
The second beacon signal represents a reception strength of the first beacon signal from each of a predetermined number of fixed stations that is smaller than the total number of the fixed stations that are transmission sources of the first beacon signal at the first reception unit. The position detection system according to claim 2, comprising information as information representing a reception status of the first beacon signal.   The first beacon signal of the first beacon signal from each of the predetermined number of fixed stations that is a transmission source of the first beacon signal having a higher reception intensity at the first receiver. The position detection system according to claim 3, further comprising information indicating reception strength at 1 as information indicating a reception status of the first beacon signal.   The second beacon signal is received by the first receiver of the first beacon signal from a single fixed station that is the transmission source of the first beacon signal that has the maximum reception intensity at the first receiver. The position detection system according to claim 4, comprising information indicating reception intensity as information indicating a reception status of the first beacon signal.   The position detection system according to any one of claims 1 to 5, wherein the first short-range wireless communication and the second short-range wireless communication are short-range wireless communication in accordance with the same rule.   6. The position according to claim 1, wherein at least one of the first short-range wireless communication and the second short-range wireless communication is short-range wireless communication in accordance with a Bluetooth Low Energy standard. Detection system. A first beacon including identification information of the fixed station, which is scanned by a beacon signal in accordance with the first short-range wireless communication regulations and broadcast-transmitted from each of one or a plurality of fixed stations by the first short-range wireless communication. A receiver for receiving the signal;
When the receiving unit receives the first beacon signal from each of the one or more fixed stations, identification information of a fixed station that is a transmission source of the first beacon signal included in the first beacon signal; And a transmission unit that broadcasts a second beacon signal by a second short-range wireless communication, each of which includes information indicating the reception status of the first beacon signal at the reception unit in a correlated format. Bureau.   The mobile station according to claim 8, wherein the first short-range wireless communication and the second short-range wireless communication are short-range wireless communication in accordance with the same rule.   9. The mobile station according to claim 8, wherein at least one of the first short-range wireless communication and the second short-range wireless communication is short-range wireless communication according to a Bluetooth Low Energy standard. A state determination unit for determining whether or not the mobile station is moving; and
When the state determination unit determines that the mobile station is moving, the reception unit scans the beacon signal to the extent of the first execution, and the state determination unit causes the mobile station to And a beacon scanning control unit that causes the receiving unit to scan the beacon signal at a second degree less than the first degree when it is determined that the signal is not moving. The mobile station in any one of thru | or 10. A state determination unit that determines whether or not the mobile station is stationary;
When the state determination unit determines that the mobile station is stationary, the reception unit scans the beacon signal to the extent of the first execution, and the state determination unit causes the mobile station to be stationary. 11. A beacon scanning control unit that causes the receiving unit to scan the beacon signal at a second degree less than the first degree when it is determined that the state is not in the state. The mobile station described in Crab. A state determination unit that determines whether the mobile station is in a state in which the first beacon signal from the one or a plurality of fixed stations can be received by the reception unit;
When it is determined by the state determination unit that the mobile station can receive the first beacon signal from one or a plurality of fixed stations by the reception unit, The reception unit scans the beacon signal, and the state determination unit determines that the mobile station is not in a state in which the reception unit can receive the first beacon signal from one or more of the fixed stations. The mobile station according to claim 8, further comprising: a beacon scanning control unit that causes the receiving unit to scan the beacon signal with a second degree less than the first degree. . A state determination unit that determines whether the mobile station is in a state in which the reception unit can receive the first beacon signal from any of the one or a plurality of fixed stations at a reception intensity equal to or higher than a predetermined threshold;
When it is determined by the state determination unit that the mobile station is capable of receiving the first beacon signal from either one or a plurality of fixed stations at a reception intensity equal to or higher than the predetermined threshold by the reception unit. Has the receiver perform scanning of the beacon signal at a first level, and the state determination unit causes the mobile station to receive the one or more fixed stations at a reception intensity equal to or higher than the predetermined threshold by the receiver. Beacon scan that causes the receiver to scan the beacon signal with a second degree less than the first degree when it is determined that the first beacon signal cannot be received from any of the above. The mobile station according to claim 8, further comprising a control unit. A state determination unit that determines whether the mobile station is in a state in which the reception state of the one or more first beacon signals received from the one or more fixed stations at the reception unit changes;
When it is determined by the state determination unit that the mobile station is in a state in which the reception status of the one or more first beacon signals received from the one or more fixed stations at the reception unit changes, The reception unit scans the beacon signal at a first level, and the state determination unit receives the one or more first beacon signals received from the one or more fixed stations by the mobile station. A beacon scanning control unit that causes the receiving unit to scan the beacon signal with a second degree less than the first degree when it is determined that the state of reception at the part is not changing. The mobile station according to claim 8, comprising:

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