JP7065971B2 - Receiving terminal, wireless transmission device, transmission / reception system, reception method and transmission / reception method - Google Patents

Description

The present invention relates to a receiving terminal for estimating a user's position, a wireless transmitting device, a transmitting / receiving system, a receiving method, and a transmitting / receiving method.

In recent years, indoor positioning techniques using short-range wireless communication such as BLE (Bluetooth (registered trademark) Low Energy), which is short-range wireless communication, have been known. For example, a mobile information terminal such as a smartphone or tablet owned by a user measures the received power from a wireless transmission device. A system has been developed that measures the position of a mobile information terminal from the received power measured by the mobile information terminal and provides information such as guidance and advertisements according to the position of the user who owns the mobile information terminal. In such a system, it is necessary to accurately estimate the user's position even in the presence of a plurality of wireless transmission devices.

Therefore, information processing that estimates the area where the user is staying by counting the wireless transmitter from the identification number included in the received data, which is associated with the area where the identification number corresponding to the wireless transmitter is installed. There is an apparatus (see, for example, Patent Document 1). Further, in this information processing apparatus, a predetermined threshold value is set for the received power in order to reduce the processing required for positioning. If the received power is extremely strong, it is estimated that the user is staying in the area where the corresponding wireless transmitter is installed, and if the received power is extremely weak, the wireless transmitter is installed. It is estimated that the user is not or is staying outside the area.

JP-A-2017-198567 (pages 7-9, 6-8)

However, in the device described in Patent Document 1, the position is estimated based on the identification number and the received power included in the data received from the wireless transmission device installed in each area. If the wireless transmitter is not installed near the area where the user is staying, or if it is out of order, data cannot be acquired from the wireless transmitter near the user. Therefore, there is a possibility that the user is presumed to be staying in an area different from the area where the user is staying, and there is a problem that the position of the user cannot be estimated accurately.

The present invention has been made to solve the above-mentioned problems, and the wireless transmission device is not installed near the area where the receiving terminal owned by the user exists, or the wireless transmission device is out of order. Even in this case, it is an object of the present invention to provide a receiving terminal, a wireless transmitting device, and a transmitting / receiving system capable of accurately estimating the position of the receiving terminal possessed by the user.

The receiving terminal according to the present invention is a receiving terminal that receives transmission data including an identification number that identifies the installation position of the wireless transmission device, which is transmitted from one or a plurality of wireless transmission devices installed in a plurality of areas. Therefore, a wireless receiving unit that receives transmission data from a wireless transmission device and measures the received power when the transmission data is received, and a transmission data and a reception power are acquired from the wireless reception unit, and the identification number is assigned. The number of identification numbers used for position estimation of the receiving terminal is determined from the transmission data information analysis unit extracted from the transmission data and the plurality of identification numbers corresponding to the acquired multiple received powers, and the number of radios is determined. It is characterized by including a position estimation unit that estimates the position of the receiving terminal based on the positional relationship of the transmitting device. Further, the position estimation unit is the area in which the wireless transmission device that transmits the transmission data having the largest reception power is installed when the wireless transmission devices are arranged in descending order of the reception power measured by the wireless reception unit. When the first area and the second area, which is the area where the wireless transmission device that transmitted the transmission data having the next highest reception power after the wireless transmission device installed in the first area is installed, are not adjacent to each other. It is presumed that the position of the area between the first area and the second area and adjacent to each of the first area and the second area is the position of the receiving terminal .

The present invention accurately estimates the position of the receiving terminal possessed by the user even when the wireless transmitting device is not installed near the area where the receiving terminal possessed by the user exists, or even if the wireless transmitting device is out of order. It can be carried out.

It is a block diagram schematically showing the structure of the transmission / reception system which concerns on Embodiment 1 of this invention. It is a figure which shows the installation example of the wireless transmission device in the vehicle of the train which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the identification number table of the wireless transmission apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the received power table stored in the transmission data information storage part of the receiving terminal which concerns on Embodiment 1 of this invention. It is a graph which showed the time change of the received power average value with the movement of the receiving terminal which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the calculation result of the received power average value for each identification number which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the content table stored in the content storage part of the receiving terminal which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the content which is displayed on the display part which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process which the receiving terminal which concerns on Embodiment 1 of this invention performs. It is a flowchart which shows the position estimation process performed by the receiving terminal which concerns on Embodiment 1 of this invention.

Hereinafter, embodiments will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one. Therefore, the specific dimensions, etc. should be determined in consideration of the following explanation. In addition, it goes without saying that parts having different dimensional relationships and ratios are included between the drawings.

Embodiment 1.
FIG. 1 is a block diagram schematically showing a configuration of a transmission / reception system according to the first embodiment of the present invention. In the present embodiment, the situation will be described in which the wireless transmission device 100 is installed in the train and the passenger (user) in the train has the receiving terminal 200. In FIG. 1, the transmission / reception system 20 receives transmission data transmitted from a wireless transmission device 100 for transmitting transmission data and transmission data transmitted from the wireless transmission device 100, estimates the position of a reception terminal 200, and then provides vehicle operation guidance. A receiving terminal 200 for displaying is provided. Specifically, the receiving terminal 200 that receives the transmission data transmitted from the wireless transmission device 100 installed in the vehicle of the train estimates the position in the vehicle or the vehicle in which the user is riding, and the position of the user. Information related to train operation (for example, information indicating the destination of the train) is displayed on the display unit 250 (on the display) of the receiving terminal 200 according to the above.

First, the wireless transmission device 100 will be described. FIG. 2 is a diagram showing an installation example of a wireless transmission device 100 in a train vehicle. FIG. 2 shows a state in which a wireless transmission device 100 (that is, wireless transmission devices 100a to 100j) is installed in front of and behind each vehicle of a 5-car train as an example. There is. The receiving terminal 200 receives transmission data transmitted from a plurality of wireless transmission devices 100a to 100j installed in a vehicle which is a plurality of areas. Both the No. 1 car side and the No. 5 car side of the train can be in front, but in the present embodiment, the No. 1 car side is the front. In the present embodiment, the number of wireless transmission devices installed in each vehicle will be described as two, but the number of wireless transmission devices may be three or more. The wireless transmission device 100 may be considered as a general term for the wireless transmission devices 100a to 100j. Further, each vehicle in which the wireless transmission device 100 is installed may be represented as an area. In FIG. 2, for example, car 1 is an area in which a wireless transmission device 100a and a wireless transmission device 100b are installed.

The wireless transmission device 100 generates transmission data and transmits the transmission data to the receiving terminal 200 at regular intervals. The transmission data generated by the wireless transmission device 100 includes device identification information that identifies the wireless transmission device 100, an identification number that identifies the installation position where the wireless transmission device 100 is installed, and content provided to the receiving terminal 200. Content information that is information is included. For example, when displaying information such as the destination of a train on the display unit 250 of the receiving terminal 200, the transmission data includes information about the train as content information. The information about the train is, for example, train type information indicating the train type (ordinary, express, limited express, etc.), starting station information indicating the starting station, ending station information indicating the ending station, and the next station which is the next stop of the train. Next station information indicating the position of the train, train position information indicating the position of the train, and door opening information indicating the door to be opened when the train is stopped.

The content information may be represented as an arbitrary ID (IDentification). In this case, it is assumed that the correspondence between the content information and any ID is defined in advance as the first station information as "CI1" for "station A" and "CI2" for "station B". .. However, the format of the content information is not limited to this, and may be a numerical value or a text code.

For the identification number, an arbitrary value indicating the installation position of the wireless transmission device 100 in the vehicle of the train is set. In the present embodiment, an arbitrary value indicating the installation location of the wireless transmission device 100 in the vehicle and the car number of the installed vehicle is set as the identification number. An example of setting the identification number will be described. For example, if the installation location in the vehicle is "front of the vehicle", the identification number is "odd", and if the installation location in the vehicle is "rear of the vehicle", the identification number is "even". When the identification number is an odd number, the car number of the vehicle on which the wireless transmission device 100 is installed is represented by an integer obtained by dividing the identification number by 2 and rounding up to the nearest whole number. When the identification number is an even number, the car number of the vehicle on which the wireless transmission device 100 is installed is represented by an integer obtained by dividing the identification number by 2.

FIG. 3 is a diagram showing an example of an identification number table of a wireless transmission device. FIG. 3 shows an identification number table showing an example of identification numbers corresponding to the wireless transmission device 100a to the wireless transmission device 100j. For example, in the case of the wireless transmission device 100f, the identification number is "6", the car number of the installed vehicle is "car 3", and the installation location in the vehicle is "rear". As the method for setting the identification number, any other setting method may be used as long as the vehicle number of the vehicle on which the wireless transmission device 100 is installed and an arbitrary value capable of indicating the installation position are set.

The wireless transmission device 100 may be connected to an information providing device (not shown) that transmits information to be included in the transmission data. For example, it may be connected by wire or wirelessly to an information providing device that transmits information about a train to the wireless transmission device 100. In this case, the wireless transmission device 100 receives information about the train from the information providing device at predetermined time intervals, generates transmission data each time, and transmits the transmission data to the receiving terminal 200. However, if it is not necessary to generate the transmission data each time, the wireless transmission device 100 may not acquire the information from the information providing device and may repeatedly transmit the same transmission data to the receiving terminal 200 for a certain period of time. In this case, the wireless transmission device 100 may be used. The transmission device 100 has a configuration that is not connected to the information providing device.

The wireless transmission device 100 transmits transmission data using short-range wireless communication. For example, the standard for short-range wireless communication is BLE, which is Bluetooth® 4.0. In BLE, radio waves in the 2.4 GHz band are used. Further, the communication distance of BLE is a relatively narrow range from 2.5 m to 50 m. Therefore, it is possible to transmit transmission data within a limited range. Further, the wireless transmission device 100 periodically transmits transmission data at predetermined intervals. According to the BLE standard, the transmission interval is between 20 ms (milliseconds) and 10.24 s (seconds). Therefore, the wireless transmission device shall set the transmission interval of the transmission data within the range specified in the BLE standard. Further, the wireless transmission device 100 can set the transmission power of the transmission data in the range of −20 dBm to 10 dBm.

The device identification information is information unique to the wireless transmission device 100. The transmission data includes, as device identification information, a specific ID or a flag that can distinguish the wireless transmission device 100 from a smart terminal or wearable device that transmits / receives data by short-range wireless communication. The receiving terminal 200 identifies the transmission data transmitted from other than the desired wireless transmitting device 100 by the device identification information, and excludes the processing performed by the receiving terminal 200. As a result, it is possible to prevent erroneous estimation in the position estimation by the receiving terminal 200.

Next, the receiving terminal 200 will be described. The receiving terminal 200 includes a wireless receiving unit 210, a control unit 220, a transmission data information storage unit 230, a content storage unit 240, and a display unit 250. Of these, the control unit 220 includes a transmission data information analysis unit 221, a position estimation unit 222, and a content acquisition unit 223. The control unit 220 may be incorporated in the receiving terminal 200 from the beginning, or may be incorporated in the receiving terminal 200 as an application downloaded from the outside. In this case, a part of the internal memory in the receiving terminal 200 is allocated to the transmission data information storage unit 230 and the content storage unit 240.

The wireless reception unit 210 receives the transmission data transmitted from the wireless transmission device 100, and measures the received power when the transmission data is received. Since a plurality of wireless transmission devices 100 are installed, transmission data is received from the plurality of wireless transmission devices 100, and the received power when the transmission data is received is measured. The wireless receiver 210 cannot receive a plurality of transmission data at one time. Therefore, for example, when the reception cycle is 100 ms, the transmission data transmitted from any of the wireless transmission devices 100a to 100j is received every 100 ms. The wireless reception unit 210 sends the transmission data and the measured received power to the control unit 220. At this time, the device identification number previously held in the receiving terminal 200 is collated with the device identification information included in the transmission data. As a result of collation, when the received transmission data is the transmission data received from a terminal other than the wireless transmission device 100, the wireless reception unit 210 does not send the transmission data and the reception power to the control unit 220, and the reception terminal 200 does not send the transmission data. Ends the processing of.

The wireless receiving unit 210 receives transmission data in accordance with the standard of Bluetooth (registered trademark) 4.0. The receiving terminal 200 is provided with a wireless receiving unit 210 and is capable of short-range wireless communication, and specifically, a smartphone, a tablet terminal, or the like can be considered.

When the user who owns the receiving terminal 200 enters the area where the wireless transmitting device 100 is installed, the wireless receiving unit 210 starts receiving the transmission data transmitted from the wireless transmitting device 100. For example, when the wireless transmission device 100 is installed in the train car, when the user gets on the vehicle in which the wireless transmission device 100 is installed, the reception of the transmission data is started.

The control unit 220 estimates the position of the receiving terminal 200 based on the transmission data acquired from the wireless receiving unit 210 and the received power, and acquires the content to be displayed on the display unit 250 of the receiving terminal 200 from the content storage unit 240. Then, the control unit 220 sends the content to the display unit 250.

The operation of the control unit 220 will be described in detail. When the transmission data information analysis unit 221 acquires the transmission data and the received power from the wireless reception unit 210, the transmission data information analysis unit 221 extracts the identification number and the content information from the transmission data, and transfers the identification number and the reception power to the position estimation unit 222 for the content. Information is sent to the content acquisition unit 223. That is, the transmission data and the received power are acquired from the wireless reception unit 210, and the identification number that identifies the installation position of the wireless transmission device 100 is extracted from the transmission data.

The position estimation unit 222 sends the identification number and the received power acquired from the transmission data information analysis unit 221 to the transmission data information storage unit 230. Then, after acquiring the reception history of the received power for each identification number registered in the transmission data information storage unit 230, the position estimation of the receiving terminal 200 is performed, and the position estimation result is sent to the content acquisition unit 223.

The position estimation unit 222 determines the identification number used for the position estimation of the receiving terminal 200 from among the plurality of identification numbers corresponding to the plurality of received powers based on the received power that is equal to or higher than a predetermined threshold among the plurality of received powers. The number is determined, and the position of the receiving terminal 200 is estimated based on the positional relationship of the wireless transmission devices 100 for the number of transmitted transmission data including the identification number used for position estimation. Further, the position estimation unit 222 acquires the reception history of a plurality of received powers from the transmission data information storage unit 230, calculates the received power average value, and uses the received power average value as the received power to determine the position of the receiving terminal 200. presume.

Prior to the description of the position estimation unit 222, the transmission data information storage unit 230 will be described. The transmission data information storage unit 230 stores the identification number and the received power acquired from the position estimation unit 222.

FIG. 4 is a diagram showing an example of a received power table stored in the transmission data information storage unit 230. In FIG. 4, “No.” is a number of received power data stored in the transmission data information storage unit 230. The received power data includes the received power and the identification number corresponding to the received power. In the received power table, the received power is registered for the identification number acquired by the transmission data information storage unit 230, and "0" is registered for each of the other identification numbers. In the received power table, the received power data to be registered is represented as [received power 1 (identification number 1), ..., Received power 10 (identification number 10)] for each No.

For example, when the transmission data information storage unit 230 acquires "5" as the identification number and "-69 (dBm)" as the reception power, the transmission data information storage unit 230 stores the reception power data [0 (1) in the reception power table. ), 0 (2), 0 (3), 0 (4), -69 (5), 0 (6), 0 (7), 0 (8), 0 (9), 0 (10)] Will be done. That is, the received power corresponding to the identification number other than the identification number 5 is 0. In the above, for the identification number that has not been acquired by the transmission data information storage unit 230, it is sufficient to indicate that the identification number has not been acquired, so that a notation other than “0” may be used.

The position estimation unit 222 performs position estimation using the reception history of a certain number of received power data. That is, since it is sufficient to register the received power data as much as necessary for the position estimation, the number of registerable data of the received power data may be set in the received power table. Assuming that the number of registerable data is m (No. m in FIG. 4), when the number of registered data reaches the number of registerable data, the oldest registered data (in the case of ascending order, No. 1 in FIG. 4, in descending order). In this case, after deleting No. m in FIG. 4, new received power data is registered in the received power table (No. m in FIG. 4 in ascending order, No. 1 in FIG. 4 in descending order). .. At this time, No is updated except for the received power data deleted in the received power table (No = No-1 in FIG. 4 in ascending order, No = No + 1 in FIG. 4 in descending order).

If the number of data that can be registered is not set in the received power table, the registration of the received power data in the received power table will be added each time the transmission data information storage unit 230 acquires the identification number and the received power. Become.

The explanation returns to the explanation about the position estimation unit 222. Each time the position estimation unit 222 acquires the identification number and the received power from the transmission data information analysis unit 221, the position estimation unit 222 acquires a reception history of a certain number of received powers from the transmission data information storage unit 230 in order to perform position estimation. Calculate the average received power. The purpose of this is to mitigate the fluctuation of the received power by calculating the average value of the received power because the received power may fluctuate greatly depending on the environment around the receiving terminal 200. In the present embodiment, the received power may be described as the average value of the received power.

In the receiving terminal 200, after a certain period of time has elapsed after the start of transmission data reception, that is, unless the transmission data information storage unit 230 has registered more received power data than necessary for the position estimation performed by the position estimation unit 222. , The average value of received power cannot be calculated and the position cannot be estimated. Therefore, the receiving terminal 200 does not perform the position estimation, and the processing in the receiving terminal 200 ends.

The number of received power data required for position estimation performed by the position estimation unit 222 depends on the time required for calculating the received power average value. For example, when the receiving terminal 200 receives the transmission data every 200 milliseconds (ms), 50 transmission data are received in 10 seconds. When the average received power is calculated for 10 seconds each, the number of received power data required for position estimation is 50. The position estimation unit 222 sets in advance the number of received power data data required for position estimation according to the reception cycle of the transmission data in the receiving terminal 200 and the reception power average value calculation time.

When more received power data than necessary for position estimation is registered in the transmission data information storage unit 230, the position estimation unit 222 receives as many received power data as necessary for position estimation from the transmission data information storage unit 230. To get. For example, the number of received power data required for position estimation is "50", and No. 4 in FIG. When m is set to "m = 50", No. 1 is displayed in the received power table. The received power data acquired by the position estimation unit 222 after registering the data of m is described as [[Received power 1 (identification number 1), ..., Received power 10 (identification number 10)] No. 1, ..., [Received power 1 (identification number 1), ..., Received power 10 (identification number 10)] No. It is expressed as [m]. From the received power table as shown in FIG. 4, [[0 (1), ..., 0 (4), -69 (5), 0 (6), ..., 0 (10)] 1, [0 (1), ..., 0 (5), -84 (6), 0 (7), ..., 0 (10)] 2, ..., [0 (1), ..., 0 (4), -57 (5), 0 ( 6), ..., 0 (10)] m] will be acquired.

The position estimation unit 222 calculates the received power average value for each identification number from the received power data acquired from the transmission data information storage unit 230. It is assumed that the average received power value for each identification number is expressed as [average value 1 (identification number 1), ..., average value 10 (identification number 10)]. In the above case, [0 (1), ..., 0 (3), -70 (4), -65 (5), -81 (6), 0 (7), 0 (8), -82 (9). , 0 (10)] to acquire the average received power value for each identification number. In calculating the average value, data in which the received power is a significant value is used, and data showing "0" in which the received power cannot be measured is not used.

The position estimation unit 222 sets a predetermined threshold value for estimating whether or not the receiving terminal 200 exists in the area where the wireless transmission device 100 is installed. The value to be set is set in advance based on the received power measured by the receiving terminal 200 in the area where the wireless transmission device 100 is installed in order to match the environment of the area where the wireless transmission device 100 is installed. In the present embodiment, as an example, when the receiving terminal 200 and the wireless transmitting device 100 are in the same area, the received power "-80 (dBm)" received by the receiving terminal 200 from the wireless transmitting device 100 is set as a predetermined threshold value. do. A received power other than "-80 (dBm)" may be set as a predetermined threshold value.

Here, the relationship between the position of the receiving terminal 200 and the average value of the received power when the receiving terminal 200 receives the transmission data from the wireless transmission devices 100a to 100j will be described. FIG. 5 is a graph showing the time change of the average received power value due to the movement of the receiving terminal. The average value of received power for each identification number calculated when moving to the transmitting device 100f) is shown. FIG. 5A is a graph showing the time change of the average value of received power, and FIG. 5B is a diagram showing the movement of a user who has a receiving terminal 200 in a train vehicle. In FIG. 5A, the vertical axis is the average received power value (unit: dBm), and the horizontal axis is the elapsed time. In FIGS. 5A and 5B, time t1 is the time when the user who possesses the receiving terminal 200 is in front of the vehicle of car No. 3, and time t2 is the time when the user who possesses the receiving terminal 200 is the vehicle of car No. 3. It is the time to be behind.

In FIG. 5A, the predetermined threshold value is “-80 (dBm)”. When the average received power value is "0", that is, when the receiving terminal 200 has not received the transmission data including the corresponding identification number, it is not shown in the graph. In FIG. 5B, the wireless transmission device 100a (1) shows the wireless transmission device 100a having the identification number 1. Further, at time t1 and time t2, the wireless transmission devices 100e and 100f corresponding to the identification numbers used for position estimation are shown in black. Further, the arrow indicates the movement of the user who possesses the receiving terminal 200 in the time zone from the time t1 to the time t2.

From FIG. 5A, at time t1, there are two received power average values that are equal to or greater than a predetermined threshold: the received power average value of the identification number 5 and the received power average value of the identification number 6. Further, the identification number of the received power average value that is equal to or higher than a predetermined threshold value corresponds to the wireless transmission device 100e and the wireless transmission device 100f. Since the wireless transmission device 100e and the wireless transmission device 100f are installed in the same vehicle, it is estimated that the area where the receiving terminal 200 is located is the "car No. 3". At time t1 in FIG. 5, since the average received power of the identification number 5 is larger than the average received power of the identification number 6, the position where the receiving terminal 200 exists is "near the wireless transmission device 100e" where the identification number is 5. It is presumed to be.

Further, even at the time t2 when the user who possesses the receiving terminal 200 moves, there are two received power average values that are equal to or higher than a predetermined threshold, that is, the received power average value of the identification number 5 and the received power average value of the identification number 6. Will be. Further, the identification number of the received power average value that is equal to or higher than a predetermined threshold value corresponds to the wireless transmission device 100e and the wireless transmission device 100f. Since the wireless transmission device 100e and the wireless transmission device 100f are installed in the same vehicle, it is estimated that the area where the receiving terminal 200 is located has not changed from "Car 3". At time t2 in FIG. 5, since the average received power of the identification number 6 is larger than the average received power of the identification number 5, the position where the receiving terminal 200 exists is "near the wireless transmission device 100f" where the identification number is 6. It is presumed to be.

If any of the received power average values for each identification number is equal to or higher than a predetermined threshold value, the position estimation unit 222 estimates that the receiving terminal 200 exists in any area where the wireless transmission device 100 is installed. That is, in the present embodiment, it is synonymous with presuming that the user possessing the receiving terminal 200 is in any vehicle. On the contrary, if any of the received power average values for each identification number is less than a predetermined threshold value, it is estimated that the user possessing the receiving terminal 200 is outside the vehicle.

When it is estimated that the receiving terminal 200 exists in any area where the wireless transmission device 100 is installed, the position estimation unit 222 further estimates the area where the receiving terminal 200 exists and the position in the area.

In this embodiment, two wireless transmission devices 100 are installed in one vehicle. Therefore, normally, it is assumed that the average received power of the identification numbers set in the two wireless transmission devices 100 installed in the same vehicle is equal to or higher than a predetermined threshold value, and the average received power is equal to or higher than the predetermined threshold value. Two values are obtained. However, if there is a vehicle in which the wireless transmission device 100 cannot be installed due to the layout of the equipment in the vehicle, or if the wireless transmission device 100 is out of order, two average received power values that exceed a predetermined threshold value are obtained. I can't. On the other hand, it is assumed that the average received power of the identification number set in the wireless transmission device 100 installed in the vehicle in which the user is not in the vehicle becomes equal to or higher than a predetermined threshold value.

Therefore, the position estimation unit 222 changes the area where the receiving terminal 200 exists and the number of identification numbers used for position estimation in the area according to the number of received power average values that are equal to or higher than a predetermined threshold, and performs position estimation. The position of the receiving terminal 200 is estimated based on the positional relationship within the installation area of the wireless transmission device 100 for the number of transmitted transmission data including the identification number to be used.

In the present embodiment, the position of the receiving terminal is estimated from among the plurality of identification numbers corresponding to the plurality of received power average values based on the received power average value which is equal to or higher than a predetermined threshold among the plurality of received power average values. Determine the number of identification numbers to use. If the average value of received power that is equal to or greater than a predetermined threshold value is two and both are identification numbers of the wireless transmission device 100 installed in the same area, the number of identification numbers used for position estimation is two. Further, when the average received power is two or more and the corresponding identification numbers are the identification numbers of the wireless transmission devices 100 installed in different areas, or the average received power is equal to or more than the predetermined threshold. When the value is 1, the number of identification numbers used for position estimation is 3 or more. Depending on the number of wireless transmission devices 100 installed in the area, the index of the number of received power average values that are equal to or higher than a predetermined threshold value may be changed.

6 to 12 are diagrams showing an example of the calculation result of the received power average value for each identification number. 6 to 12, FIG. 12A is a diagram showing the arrangement of the wireless transmission devices 100a to 100j in the train vehicle and the position p1 where the receiving terminal 200 is present. The target train is the same as in FIG. The wireless transmission device 100a (1) indicates a wireless transmission device 100a having an identification number of 1. The wireless transmitter 100 corresponding to the identification number used for position estimation is shown in black. FIG. (B) shows the calculation result, the reception order, and the installation area of the received power average value calculated by each of the wireless transmission devices 100a to 100j (corresponding to the identification numbers 1 to 10) described with reference to FIG. It is a figure. A place where the average received power value is blank indicates that the received power is 0. Further, the fact that the number of the reception order is marked with ◯ indicates that the average received power value exceeds a predetermined threshold value.

FIG. 6 shows the average received power value for each identification number calculated when the user who possesses the receiving terminal 200 gets on the front of the vehicle in the No. 3 vehicle. FIG. 7 shows the average received power value for each identification number calculated when the user possessing the receiving terminal 200 moves to the front of the vehicle in the No. 4 vehicle. FIG. 8 shows the average received power value for each identification number calculated when the user who possesses the receiving terminal 200 gets on the rear of the vehicle in the No. 1 car. FIG. 9 shows a case where the user who possesses the receiving terminal 200 moves to the rear of the vehicle in the No. 2 vehicle, and the wireless transmitting devices 100c and 100d are installed at the positions where the wireless transmitting devices 100c and 100d should be installed. The average value of the received power for each identification number is shown when the wireless transmission devices 100c and 100d are not installed or when the wireless transmission devices 100c and 100d are out of order.

FIG. 10 shows the average received power value for each identification number calculated when the user who possesses the receiving terminal 200 gets on the front of the vehicle in the second car. FIG. 11 shows the average received power value for each identification number calculated when the user who possesses the receiving terminal 200 gets on the front of the vehicle in the No. 5 car. FIG. 12 shows a case where the user who possesses the receiving terminal 200 moves to the rear of the vehicle in the No. 3 vehicle, and the wireless transmitting devices 100e and 100f are installed at the positions where the wireless transmitting devices 100e and 100f should be installed. The average value of the received power for each identification number is shown when the wireless transmission devices 100e and 100f are out of order.

The position estimation of the position where the receiving terminal 200 exists will be described while adding the explanation of the specific example of the received power average value shown in FIGS. 6 to 12.

In the position estimation unit 222, the wireless transmission devices 100 for the number of identification numbers used for the position estimation of the receiving terminal 200 are installed in the same area, or the wireless transmission devices for the number are installed in the adjacent area. Based on this, the position of the receiving terminal is estimated.

First, when there are two average received power values that exceed a predetermined threshold value, and two wireless transmission devices that transmit transmission data including identification numbers corresponding to these two are installed in the same area. explain.

The position estimation unit 222 has two received power average values that are equal to or higher than a predetermined threshold, and both are identification numbers of the wireless transmission devices 100 installed in the same area (radio transmission installed in the same area). (When the number of devices 100 installed is two), it is estimated that the area where the receiving terminal 200 owned by the user exists is the installation area of the wireless transmission device 100. Then, the position estimation unit 222 selects the larger received power average value from the two received power average values, and the receiving terminal 200 near the wireless transmission device 100 having the identification number corresponding to the selected received power average value. Is presumed to be the position where. The position estimation unit 222 estimates that the position where the receiving terminal 200 is located is in the center of the area when the two received power average values match or when the difference between the two received power average values is a certain value or less. ..

In this way, the wireless transmission devices 100 are installed in the same area as the number of identification numbers used for the position estimation of the receiving terminal 200, and the wireless transmission devices 100 are installed in the same area as the number of identification numbers. If the numbers are the same, the position of the receiving terminal 200 is estimated as follows. The position estimation unit 222 is located in the vicinity of the wireless transmission device 100 that transmits transmission data including an identification number corresponding to the maximum received power average value among the received power average values that are equal to or higher than a predetermined threshold in the same area. It is estimated that the receiving terminal 200 is located.

A specific example of such estimation will be described with reference to FIG. As shown in FIG. 6A, the position p1 where the receiving terminal 200 is located is in front of the vehicle No. 3. As shown in FIG. 6B, the average received power values equal to or higher than a predetermined threshold at position p1 are 2 of the average received power of identification number 5 −73 dBm and the average received power of identification number 6 −77 dBm. It becomes an individual. Further, the identification numbers 5 and 6 of the received power average value that are equal to or higher than a predetermined threshold value correspond to the wireless transmission device 100e and the wireless transmission device 100f. The wireless transmission device 100e and the wireless transmission device 100f are installed in the same vehicle. From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 3". Since the average received power of the identification number 5 is larger than the average received power of the identification number 6 at the position p1, the position estimation unit 222 uses the position estimation unit 222 to "wirelessly transmit" that the position of the receiving terminal 200 owned by the user is the identification number 5. It is estimated to be "near the device 100e".

Next, two wireless transmission devices that transmit transmission data including one or more received power average values that are equal to or higher than a predetermined threshold and include identification numbers corresponding to the upper two received power average values are in different areas. The case where it is installed will be described.

The position estimation unit 222 has an identification number of a wireless transmission device 100 installed in an area where the average received power that is equal to or greater than a predetermined threshold is one or more and the identification numbers corresponding to the upper two average received powers are different. If this is the case, the top three received power average values are used, and the positions of the areas where the radio transmission device 100, which is the corresponding identification number, is installed are compared.

The position estimation unit 222 transmits transmission data including an identification number corresponding to a received power average value equal to or higher than a predetermined threshold value (or an identification number corresponding to the largest received power among a plurality of received power average values). The area where the wireless transmission device 100 is installed is defined as the first area. The position estimation unit 222 uses the area in which the wireless transmission device 100 that has transmitted the transmission data including the identification number corresponding to the second largest received power average value among the plurality of received power average values is installed as the second area. The position estimation unit 222 uses the area where the wireless transmission device 100 that has transmitted the transmission data including the identification number corresponding to the third largest received power average value among the plurality of received power average values is installed as the third area. ..

In the position estimation unit 222, when the first area is adjacent to the second area and the third area (the second area, the first area, and the third area are arranged in this order, the second area and the first area are adjacent to each other, and the second area is adjacent to the third area. (When one area and the third area are adjacent to each other), it is estimated that the area where the receiving terminal 200 exists is the first area. Then, the position estimation unit 222 estimates that the position in the vicinity of the wireless transmission device 100 installed on the second area side in the first area is the position where the receiving terminal 200 exists. Although the order of arrangement of each area will be described in the present embodiment, the order of arrangement may be either from the front of the vehicle or from the rear of the vehicle. Further, even if the order of arranging is reversed, the position where the receiving terminal 200 exists can be estimated in the same manner.

A specific example of such estimation will be described with reference to FIG. 7. As shown in FIG. 7A, the position p1 where the receiving terminal 200 is located is in front of the vehicle No. 4. As shown in FIG. 7B, the average received power values that are equal to or greater than a predetermined threshold at position p1 are 2 of the average received power of identification number 6 −76 dBm and the average received power of identification number 7 −73 dBm. It becomes an individual. Further, the identification number of the received power average value that is equal to or higher than a predetermined threshold value corresponds to the wireless transmission device 100f and the wireless transmission device 100g. The wireless transmission device 100f is installed in the third car (second area). The wireless transmitter 100g is installed in the No. 4 car (first area). The wireless transmission device 100i having the identification number 9 having the third largest average received power is installed in car No. 5 (third area) and is adjacent to each other. From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 4". Since the wireless transmission device 100f corresponding to the identification number 6 having the second largest received power average value at the position p1 is installed in the car No. 3, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is estimated to be "around 100 g of the transmitter".

The position estimation unit 222 is in a state where the first area is adjacent to the second area and the third area is located on the second area side, and is not adjacent to the first area (first area, second area, third area). (When the first area and the second area are adjacent to each other and the second area and the third area are adjacent to each other), it is estimated that the area where the receiving terminal 200 is present is the first area. Then, the position estimation unit 222 estimates that the position in the vicinity of the wireless transmission device 100 installed on the second area side in the first area is the position where the receiving terminal 200 exists.

A specific example of such estimation will be described with reference to FIG. As shown in FIG. 8A, the position p1 where the receiving terminal 200 is located is behind the vehicle of the first car. As shown in FIG. 8B, the average received power value that is equal to or greater than a predetermined threshold value at the position p1 is one of the average received power value −76 dBm of the identification number 2. The wireless transmission device 100b corresponding to the identification number 2 is installed in the first car (first area). The wireless transmission device 100c corresponding to the identification number 3 having the second largest received power average value is installed in the second car (second area). The wireless transmission device 100e corresponding to the identification number 5 having the third largest received power average value is installed in the third car (third area). From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 1". Since the wireless transmission device 100c corresponding to the identification number 3 having the second largest received power average value at the position p1 is installed in the car No. 2, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is estimated to be "near the transmitter 100b".

The position estimation unit 222 arranges in the order of the first area and the second area, and when the first area is not adjacent to the second area, it estimates that the area where the receiving terminal 200 is present is the area adjacent to the first area. Here, the adjacent area refers to the second area side (the area between the first area and the second area). Then, the position estimation unit 222 estimates that the position near the wireless transmission device 100 installed on the second area side in the adjacent area is the position where the receiving terminal 200 exists.

A specific example of such estimation will be described with reference to FIG. As shown in FIG. 9A, the position p1 where the receiving terminal 200 is located is behind the vehicle of the second car. As shown in FIG. 9B, the average received power value that exceeds a predetermined threshold value at the position p1 is one of the average received power value −76 dBm of the identification number 2. The wireless transmission device 100b corresponding to the identification number 2 is installed in the first car (first area). The wireless transmission device 100e corresponding to the identification number 5 having the second largest received power average value is installed in the third car (second area). The wireless transmission device 100f corresponding to the identification number 6 having the third largest received power average value is also installed in the third car (second area). From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 2". Since the wireless transmission device 100f corresponding to the identification number 6 having the third largest received power average value at the position p1 is installed in the car No. 3, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is estimated to be "near the transmitter 100d".

Next, two wireless transmission devices that transmit transmission data having one or more received power average values that are equal to or higher than a predetermined threshold and include identification numbers corresponding to the upper two received power average values are in the same area. The case where it is installed will be described.

The position estimation unit 222 is an identification number of a wireless transmission device 100 having one received power average value that is equal to or higher than a predetermined threshold and having identification numbers corresponding to the upper two received power average values in the same area. If there is, the top four received power averages are used to compare the positions of the areas where the corresponding identification numbers, the wireless transmitter 100, are installed. This is because the number of installed wireless transmitters 100 that transmit transmission data including the identification number corresponding to the average received power that is equal to or greater than a predetermined threshold is larger than the number of wireless transmitters 100 installed in the same area. There are few cases.

The position estimation unit 222 is the second of the wireless transmission device 100 and the plurality of received power average values that transmit the transmission data including the identification number corresponding to the largest received power average value among the plurality of received power average values. The area in which the wireless transmission device 100 that has transmitted the transmission data including the identification number corresponding to the large average value of the received power is installed is defined as the first area. The position estimation unit 222 uses the area in which the wireless transmission device 100 that has transmitted the transmission data including the identification number corresponding to the third largest received power average value among the plurality of received power average values is installed as the second area. The position estimation unit 222 uses the area in which the wireless transmission device 100 that has transmitted the transmission data including the identification number corresponding to the fourth largest received power average value among the plurality of received power average values is installed as the third area. ..

In the position estimation unit 222, when the first area is adjacent to the second area and the third area (the second area, the first area, and the third area are arranged in this order, the second area and the first area are adjacent to each other, and the second area is adjacent to the third area. (When one area and the third area are adjacent to each other), it is estimated that the area where the receiving terminal 200 exists is the first area. Then, the position estimation unit 222 estimates that the position in the vicinity of the wireless transmission device 100 installed on the second area side in the first area is the position where the receiving terminal 200 exists.

A specific example of such estimation will be described with reference to FIG. As shown in FIG. 10A, the position p1 where the receiving terminal 200 is located is in front of the vehicle No. 2. As shown in FIG. 10B, the average received power value that is equal to or greater than a predetermined threshold value at the position p1 is one of the average received power value −73 dBm of the identification number 3. The wireless transmission device 100c corresponding to the identification number 3 and the wireless transmission device 100d corresponding to the identification number 4 having the second largest received power average value are installed in the second car (first area). The wireless transmission device 100b corresponding to the identification number 2 having the third largest received power average value is installed in the first car (second area). The wireless transmission device 100e corresponding to the identification number 5 having the fourth largest received power average value is installed in the third car (third area). From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 2". Since the wireless transmission device 100b corresponding to the identification number 2 having the third largest received power average value at the position p1 is installed in the car No. 1, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is estimated to be "near the transmitter 100c".

The position estimation unit 222 is in a state where the first area is adjacent to the second area and the third area is located on the second area side, and is not adjacent to the first area (first area, second area, third area). (When the first area and the second area are adjacent to each other and the second area and the third area are adjacent to each other), it is estimated that the area where the receiving terminal 200 is present is the first area. Then, the position estimation unit 222 estimates that the position in the vicinity of the wireless transmission device 100 installed on the second area side in the first area is the position where the receiving terminal 200 exists.

A specific example of such estimation will be described with reference to FIG. As shown in FIG. 11A, the position p1 where the receiving terminal 200 is located is in front of the vehicle No. 5. As shown in FIG. 11B, the average received power value that is equal to or greater than a predetermined threshold value at the position p1 is one of the average received power value −73 dBm of the identification number 9. The wireless transmission device 100i corresponding to the identification number 9 and the wireless transmission device 100j corresponding to the identification number 10 having the second largest received power average value are installed in car No. 5 (first area). The wireless transmission device 100h corresponding to the identification number 8 having the third largest received power average value is installed in the fourth car (second area). The wireless transmission device 100f corresponding to the identification number 6 having the fourth largest received power average value is installed in the third car (third area). From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 5". Since the wireless transmission device 100h corresponding to the identification number 8 having the third largest received power average value at the position p1 is installed in the car No. 4, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is presumed to be "near the transmitter 100i".

When the first area is not adjacent to the second area (the second area, the first area, and the third area are arranged in this order, the second area and the first area are not adjacent to each other, the position estimation unit 222 is arranged in the order of the second area, the first area, and the third area, and the first area and the third area are not adjacent to each other. (When the area is adjacent), it is estimated that the area where the receiving terminal 200 is located is the area adjacent to the first area. Here, the adjacent area refers to the second area side (the area between the first area and the second area). Then, it is estimated that the vicinity of the wireless transmission device 100 installed on the first area side in the adjacent area is the position where the receiving terminal 200 exists.

A specific example of such estimation will be described with reference to FIG. From FIG. 12, as shown in FIG. 12A, the position p1 where the receiving terminal 200 is located is behind the vehicle of the third car. As shown in FIG. 12B, the average received power value that is equal to or greater than a predetermined threshold value at the position p1 is one of the average received power value −76 dBm of the identification number 7. The wireless transmission device 100g corresponding to the identification number 7 and the wireless transmission device 100h corresponding to the identification number 8 having the second largest received power average value are installed in the No. 4 car (first area). The wireless transmission device 100d corresponding to the identification number 4 having the third largest received power average value is installed in the second car (second area). The wireless transmission device 100i corresponding to the identification number 9 having the fourth largest received power average value is installed in the fifth car (third area). From this, the position estimation unit 222 estimates that the area where the receiving terminal 200 is located is the "car No. 3". Since the wireless transmission device 100i corresponding to the identification number 9 having the fourth largest received power average value at the position p1 is installed in the car No. 5, the position estimation unit 222 has the position where the receiving terminal 200 is located "wirelessly". It is estimated to be "near the transmitter 100f".

Returning to the explanation of the block diagram of FIG. If the position estimation result does not fluctuate for a certain period of time, the position estimation unit 222 sends the position estimation result to the content acquisition unit 223, assuming that the position estimation is completed. On the other hand, when the position estimation result fluctuates in a certain period, the position estimation result is not sent to the content acquisition unit 223 while the position estimation result is held, and the subsequent processing in the receiving terminal 200 is not performed.

For example, when a position estimation result such that the area where the receiving terminal 200 is located is "Car 3" and the position where the receiving terminal 200 is located is "Radio transmitting device 100f" is obtained as a position estimation result for a certain period, the position estimation unit is used. In 222, as a position estimation result, the area where the receiving terminal 200 exists is the “car 3” and the position where the receiving terminal 200 exists sends the “radio transmitting device 100f” to the content acquisition unit 223. After obtaining the position estimation result that the area where the receiving terminal 200 exists is "car 3" and the position where the receiving terminal 200 exists is "wireless transmission device 100f", the area where the receiving terminal 200 exists is "car 3". When the position estimation result that the position where the receiving terminal 200 exists is "wireless transmission device 100e" is obtained, the position estimation unit 222 has the area where the receiving terminal 200 exists is "car 3" and the receiving terminal. The position where the 200 exists holds a state such as "wireless transmission device 100e", and the processing of the receiving terminal 200 ends.

Here, the position estimation unit 222 sets in advance a certain period for determining whether or not to send the position estimation result to the content acquisition unit 223. In the present embodiment, it is performed within the train stop time, but it is changed according to the application destination of the transmission / reception system 20. Further, the number of transmission data that can be received by the receiving terminal 200 per fixed time may be specified.

As described above, by performing the above processing in the position estimation unit 222, even if any of the wireless transmission devices 100 is out of order or the wireless transmission device 100 is not installed, the receiving terminal 200 can be used. The user's position can be estimated from the received transmission data.

When the content acquisition unit 223 acquires the position estimation result from the position estimation unit 222, the content acquisition unit 223 displays the content information acquired from the transmission data information analysis unit 221 and the content acquired from the content storage unit 240 based on the position estimation result. Send to 250.

The content storage unit 240 stores the content displayed by the display unit 250. FIG. 13 shows an example of a content table stored in the content storage unit 240. The content table shows the correspondence between the content information and the position for the content. From FIG. 13, for example, the content corresponding to the content information "CI1" and the position "P2" is "C2". Further, the content is text information, a still image, a moving image, a voice, or a combination thereof.

The display unit 250 is an output interface for the content acquired from the content acquisition unit 223, and displays the content based on the position of the receiving terminal 200 and the content information included in the transmission data. FIG. 14 shows an example of the content displayed on the display unit 250. Content according to the user's position is displayed on the display unit 250. For example, when the wireless transmission device 100 is installed near the priority seat of the vehicle, the screen as shown in FIG. 14A is displayed on the display of the receiving terminal located at a position away from the priority seat of the first car. To. On the other hand, in the vicinity of the priority seat of car 1, as shown in FIG. 14 (b), a notice such as "Please switch to the manner mode" is added in the vicinity of the priority seat.

Next, the operation of each device of the transmission / reception system 20 according to the present embodiment will be described. First, the wireless transmission device 100 installed in each vehicle transmits transmission data at regular intervals after the power is turned on. However, the wireless transmission device 100 and an external terminal (not shown) may be connected, a transmission data transmission start instruction may be received from the external terminal, and transmission data transmission may be started. The transmission power of the transmission data in the wireless transmission device 100 is set so that the receiving terminal 200 can receive the transmission data of the wireless transmission device 100 installed in the vehicle. For example, the transmission power of the wireless transmission device 100a installed in the car No. 1 and the transmission power of the wireless transmission device 100b are the transmission data transmitted from the wireless transmission device 100a by the receiving terminal 200 existing in the car No. 1 and the wireless transmission device 100b. The transmission power is set so that the transmission data transmitted from is receivable.

The wireless transmission device 100 generates transmission data and transmits it to the receiving terminal 200. At this time, the wireless transmission device 100 determines the identification number included in the transmission data based on the correspondence between the wireless transmission device 100 and the identification number, and then generates the transmission data. When the wireless transmission device 100 is connected to an information providing device (not shown), the wireless transmission device 100 newly generates transmission data each time information is acquired from the information providing device. When the wireless transmission device 100 is not connected to the information providing device, transmission data is generated immediately after the wireless transmission device 100 is activated or after an instruction from an external terminal. In this case, the information contained in the transmitted data does not change. Further, the identification number included in the transmission data is set in advance for each installation position of the wireless transmission device 100.

The operation of the receiving terminal 200 will be described with reference to a flowchart. FIG. 15 is a flowchart showing a process executed by the receiving terminal 200. The wireless receiving unit 210 receives the transmission data (step S101) and measures the received power at the time of receiving the transmission data (step S102). Here, when the device identification number of the wireless transmission device 100 held in advance by the receiving terminal 200 and the device identification number of the wireless transmission device 100 included in the transmission data match (YES in step S103), step S104. Proceed to processing. If the device identification number of the wireless transmission device 100 held in advance by the receiving terminal 200 does not match the device identification number included in the transmission data (NO in step S103), the process in the receiving terminal 200 ends.

The transmission data information analysis unit 221 acquires the identification number and the content information included in the transmission data acquired from the wireless reception unit 210 (step S104). Then, the position estimation unit 222 registers the identification number and the received power in the transmission data information storage unit 230 (step S105). Here, when the identification number registered in the transmission data information storage unit 230 and the received power are a certain number or more (YES in step S106), the process proceeds to step S107. When the identification number registered in the transmission data information storage unit 230 and the received power are less than a certain number (NO in step S106), the process in the receiving terminal 200 ends.

The position estimation unit 222 estimates the position of the receiving terminal 200 from the reception history of the received power for each identification number acquired from the transmission data information storage unit 230 (step S107). Here, if the position estimation results estimated in step S107 are the same a certain number of times or more (YES in step S108), the process proceeds to step S109. When the position estimation result is not the same more than a certain number of times (NO in step S108), the processing in the receiving terminal 200 is terminated while holding the position estimation result most recently acquired by the position estimation unit 222.

The content acquisition unit 223 acquires content from the content storage unit 240 based on the content information acquired from the transmission data information analysis unit 221 and the position estimation result acquired from the position estimation unit 222 (step S109). Then, the display unit 250 displays the content acquired by the content acquisition unit 223 (step S110).

Here, the details of the processing of step S107 in the position estimation unit 222 will be described with reference to a flowchart. FIG. 16 is a flowchart showing a position estimation process executed by the receiving terminal. The position estimation unit 222 calculates the average value of the received power for each identification number in the received power acquired from the transmission data information storage unit 230 (step S201). Here, when the average received power value that exceeds a predetermined threshold value is one or more (YES in step S202), the process proceeds to step S203. When the average value of received power that exceeds a predetermined threshold is 0 (NO in step S202), it is estimated that the user possessing the receiving terminal 200 is outside the vehicle (outside the area) (step S210), and the process ends. do.

The installation area of the wireless transmission device 100 corresponding to the identification number having one or more received power average values that exceed a predetermined threshold value and the maximum received power average value, and the identification number having the second largest received power average value. If the installation area of the wireless transmission device 100 corresponding to the above is different (YES in step S203), the process proceeds to step S204. When the installation area of the wireless transmission device 100 corresponding to the identification number having the maximum received power average value and the installation area of the wireless transmission device 100 corresponding to the identification number having the second largest received power average value are the same (step S203). NO), the process proceeds to step S207.

If YES is estimated in step S203, the position estimation unit 222 determines that the number of identification numbers used for position estimation of the receiving terminal 200 is 3, and uses the average received power of the top 3 average values. It will be decided (step S204). Then, the positional relationship of the installation area of the wireless transmission device 100 that has transmitted the transmission data including the identification numbers corresponding to the top three received power average values is compared (step S205), and the area where the receiving terminal 200 exists and the area where the receiving terminal 200 exists are compared. The position where the receiving terminal 200 exists (step S206) is acquired, and the position estimation process is terminated.

When the average received power value estimated to be NO in step S203 and equal to or greater than a predetermined threshold is one (YES in step S207), the position estimation unit 222 determines the number of identification numbers used for position estimation of the receiving terminal 200. It is determined that the number is 4, and the average received power of the top 4 average values is used (step S208). Then, the process proceeds to step S205, and the positional relationship of the installation area of the wireless transmission device 100 that has transmitted the transmission data including the identification numbers corresponding to the top three received power average values is compared (step S205), and the receiving terminal is used. By acquiring the area where the 200 exists and the position where the receiving terminal 200 exists (step S206), the position estimation process ends.

When it is estimated to be NO in step S207, the position estimation unit 222 determines that the number of identification numbers used for position estimation of the receiving terminal 200 is 2, and uses the average received power of the top two average values. It will be decided (step S209). Then, the process proceeds to step S206, and the position estimation process is completed by acquiring the area and the position where the receiving terminal 200 exists (step S206).

As described above, according to the transmission / reception system according to the first embodiment, the reception terminal owned by the user even when the wireless transmission device 100 is not installed or the wireless transmission device 100 is out of order. 200 position estimates can be made. If the installation area and position of the wireless transmission device 100 corresponding to the identification number that maximizes the reception power of the transmission data received by the receiving terminal 200 is used as the position estimation result, the wireless transmission device 100 is not installed or wirelessly. If the transmission device 100 is out of order, it is presumed that the user is in a vehicle that is not in the vehicle, for example. In the transmission / reception system according to the present embodiment, by comparing the positional relationship of the wireless transmission device 100 that has transmitted the transmission data, the position estimation of the reception terminal 200 possessed by the user can be accurately performed even in the above case.

In addition, it is possible to provide information according to the user's position based on the position estimation result. For example, in a train vehicle, the priority seat can be alerted only to the user who is staying near the priority seat. It can also provide a route from the nearest door at the station where you get off.

In this embodiment, for the sake of easy understanding, the explanation has been limited to train vehicles, but it can be applied even in a situation where a plurality of areas are arranged adjacent to each other in a row. , The same effect can be expected.

Further, although the embodiments of the present invention have been described as described above, the present invention is not limited to these embodiments.

20 transmission / reception system, 100, 100a-100j wireless transmitter, 200 receiver terminal, 210 wireless receiver, 220 control unit, 221 transmission data information analysis unit, 222 position estimation unit, 223 content acquisition unit, 230 transmission data information storage unit, 240 content storage unit, 250 display unit.

Claims (7)

A receiving terminal that receives transmission data including an identification number that identifies the installation position of the wireless transmission device, which is transmitted from one or a plurality of wireless transmission devices installed in a plurality of areas.
A wireless receiving unit that receives the transmission data from the wireless transmission device and measures the received power when the transmission data is received.
A transmission data information analysis unit that acquires the transmission data and the received power from the wireless reception unit and extracts an identification number that identifies the installation position of the wireless transmission device from the transmission data.
The number of the identification numbers used for estimating the position of the receiving terminal is determined from the plurality of the identification numbers corresponding to the plurality of acquired received powers, and the positional relationship of the number of the wireless transmission devices is determined. Based on the position estimation unit that estimates the position of the receiving terminal
Equipped with
The position estimation unit is the first area in which the wireless transmission device that transmits the transmission data having the highest reception power is installed when the wireless transmission devices are arranged in descending order of the reception power measured by the wireless reception unit. When the area and the second area, which is the area where the wireless transmission device that transmitted the transmission data having the next highest reception power after the wireless transmission device installed in the first area is installed, are not adjacent to each other, the first area is not adjacent. It is presumed that the position of the area between the one area and the second area and adjacent to each of the first area and the second area is the position of the receiving terminal.
A receiving terminal characterized by that. A receiving terminal that receives transmission data transmitted from multiple wireless transmitters installed in multiple areas.
A wireless receiving unit that receives the transmission data from the wireless transmission device and measures the received power when the transmission data is received.
A transmission data information analysis unit that acquires the transmission data and the received power from the wireless reception unit and extracts an identification number that identifies the installation position of the wireless transmission device from the transmission data.
The number of the identification numbers used for position estimation of the receiving terminal from among the plurality of identification numbers corresponding to the plurality of received powers based on the received powers which are equal to or higher than a predetermined threshold value among the plurality of received powers. A position estimation unit that estimates the position of the receiving terminal based on the positional relationship of the number of wireless transmission devices that have transmitted the transmission data including the identification number used for the position estimation.
Equipped with
The position estimation unit is
The area where the wireless transmission device that has transmitted the transmission data including the identification number corresponding to the received power that exceeds the predetermined threshold value is installed is set as the first area.
To the wireless transmission device that transmitted the transmission data including the identification number corresponding to the reception power corresponding to the second largest reception power among the plurality of received powers, and to the reception power having the third largest reception power among the plurality of received powers. The area where the wireless transmission device that has transmitted the transmission data including the corresponding identification number is installed is defined as the second area.
When the first area and the second area are arranged in this order and the first area and the second area are not adjacent to each other,
Receiving that is an area between the first area and the second area and is presumed to be the position of the receiving terminal in the vicinity of the radio transmitting device installed on the second area side. Terminal. A receiving terminal that receives transmission data transmitted from multiple wireless transmitters installed in multiple areas.
A wireless receiving unit that receives the transmission data from the wireless transmission device and measures the received power when the transmission data is received.
A transmission data information analysis unit that acquires the transmission data and the received power from the wireless reception unit and extracts an identification number that identifies the installation position of the wireless transmission device from the transmission data.
The number of the identification numbers used for position estimation of the receiving terminal from among the plurality of identification numbers corresponding to the plurality of received powers based on the received powers which are equal to or higher than a predetermined threshold value among the plurality of received powers. A position estimation unit that estimates the position of the receiving terminal based on the positional relationship of the number of wireless transmission devices that have transmitted the transmission data including the identification number used for the position estimation.
Equipped with
The position estimation unit is
The number of installations of the wireless transmission device that has transmitted the transmission data including the identification number corresponding to the reception power corresponding to the predetermined threshold value is the number of installations of the wireless transmission device installed in the same area. Less,
Corresponds to the wireless transmission device that has transmitted the transmission data including the identification number corresponding to the reception power having the highest reception power among the plurality of received powers and the reception power having the second largest reception power among the plurality of received powers. The area where the wireless transmission device that has transmitted the transmission data including the identification number is installed is set as the first area.
The area where the wireless transmission device that has transmitted the transmission data including the identification number corresponding to the third largest received power among the plurality of received powers is installed is defined as the second area.
The area where the wireless transmission device that has transmitted the transmission data including the identification number corresponding to the fourth largest received power among the plurality of received powers is installed is defined as the third area.
When the second area, the first area, and the third area are arranged in this order, the second area and the first area are not adjacent to each other, and the first area and the third area are adjacent to each other.
A receiving terminal that is between the first area and the second area and is presumed to be the position of the receiving terminal in the vicinity of the wireless transmission device installed on the first area side. With one or more wireless transmitters installed in multiple areas,
A transmission / reception system including the receiving terminal according to any one of claims 1 to 3. A wireless transmitter that is installed in multiple areas and transmits transmission data to receiving terminals.
The transmission data includes an identification number that identifies the installation position of the wireless transmission device.
The transmission data is received from the wireless transmission device, the received power when the transmission data is received is measured, the identification number is extracted from the transmission data, and a plurality of the identifications corresponding to the plurality of received powers are identified. In the case where the number of the identification numbers used for the position estimation of the receiving terminal is determined from the numbers, the position estimation is performed based on the positional relationship of the number of the wireless transmission devices, and the position estimation is performed. When the wireless transmission devices are arranged in descending order of the measured reception power, the first area is the area in which the wireless transmission device that has transmitted the transmission data having the highest reception power is installed, and the first area. When the second area, which is the area where the wireless transmission device that transmitted the transmission data having the next highest received power after the wireless transmission device installed in the above area is installed, the first area and the second area are not adjacent to each other. It is characterized in that the transmission data is transmitted to the receiving terminal which is located between and adjacent to each of the first area and the second area, and the position of the area is presumed to be the position of the receiving terminal. Wireless transmitter. A receiving method in which a receiving terminal receives transmission data including an identification number for identifying an installation position of the wireless transmission device, which is transmitted from one or a plurality of wireless transmission devices installed in a plurality of areas.
The transmission data is received from the wireless transmission device, and the received power when the transmission data is received is measured.
The transmission data and the received power are acquired, and the identification number is extracted from the transmission data.
The number of the identification numbers used for estimating the position of the receiving terminal is determined from the plurality of the identification numbers corresponding to the plurality of acquired received powers, and the positional relationship of the number of the wireless transmission devices is determined. Based on this, the position of the receiving terminal is estimated, and
In the case of estimating the position of the receiving terminal, and when the wireless transmitting devices are arranged in descending order of the measured received power, in the area where the wireless transmitting device that transmitted the transmission data having the largest received power is installed. When a certain first area and the second area which is the area where the wireless transmission device which transmitted the transmission data having the next largest reception power after the wireless transmission device installed in the first area is installed are not adjacent to each other. , It is estimated that the position of the area between the first area and the second area and adjacent to each of the first area and the second area is the position of the receiving terminal.
The receiving method is characterized by that. A method for transmitting and receiving transmission data including an identification number for identifying the installation position of the wireless transmission device, which is transmitted from a plurality of wireless transmission devices installed in a plurality of areas to a receiving terminal.
The transmission data is received from the wireless transmission device, and the received power when the transmission data is received is measured.
The transmission data and the received power are acquired, and the identification number is extracted from the transmission data.
The number of the identification numbers used for estimating the position of the receiving terminal is determined from the plurality of the identification numbers corresponding to the plurality of acquired received powers, and the positional relationship of the number of the wireless transmission devices is determined. Based on this, the position of the receiving terminal is estimated, and
In the case of estimating the position of the receiving terminal, and when the wireless transmitting devices are arranged in descending order of the measured received power, in the area where the wireless transmitting device that transmitted the transmission data having the largest received power is installed. When a certain first area and the second area which is the area where the wireless transmission device which transmitted the transmission data having the next largest reception power after the wireless transmission device installed in the first area is installed are not adjacent to each other. , It is estimated that the position of the area between the first area and the second area and adjacent to each of the first area and the second area is the position of the receiving terminal.
A transmission / reception method characterized by that.

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