JP6758378B2 - Position measurement system, mobile terminal device and program - Google Patents

Description

The present invention relates to a position measurement system, a mobile terminal device and a program, particularly a position measurement in an area of a user who possesses the mobile terminal device.

A technique for measuring the position of a user in a certain area by using a mobile terminal device (hereinafter, "mobile terminal") such as a smartphone carried by the user has been proposed (for example, "Patent Document 1").

FIG. 6 is a block configuration diagram of a conventional mobile terminal 100. A plurality of base stations are installed in the area, and each base station transmits radio waves for 10 milliseconds at a predetermined cycle, for example, once per second. On the other hand, the mobile terminal 100 is equipped with a wireless communication means for detecting radio waves transmitted by each base station, for example, an interface for performing wireless communication by Bluetooth (registered trademark). The wireless communication unit 110 in the mobile terminal 100 has a wireless communication unit 1101 that cooperates with this communication interface to perform wireless communication with each base station and a radio wave detection unit 1102 that detects radio waves transmitted from the base station. are doing. Further, the mobile terminal 100 includes a position measurement unit 120 that measures the position of the user according to the detection status of radio waves from the base station, a movement detection unit 130 that detects the movement of the user in cooperation with an acceleration sensor (not shown), and a wireless communication unit. It has a control unit 140 that controls switching of the detection mode in 110.

The mobile terminal 100 having the above configuration starts the user's position measurement by activating a predetermined application. That is, when a predetermined application is started, the mobile terminal 100 enters the area search mode, sets the detection mode to intermittent scan, and attempts to detect radio waves from the base station. Specifically, the intermittent scan scans for 2 seconds, and if radio waves from the base station are not detected during that period, the scan is stopped for 3 seconds to enter a standby state. Then, when 3 seconds have passed, a 2-second scan is performed. The mobile terminal 100 repeats the above-mentioned intermittent scan until the radio wave from the base station is detected. That is, when the user is outside the area, the radio wave detection unit 1102 cannot detect the radio wave from the base station, so that the intermittent scan is continuously performed.

When the radio wave from the base station is detected by the user entering the area, the mobile terminal 100 enters the position measurement mode, sets the detection mode to continuous scan, and constantly detects the radio wave from the base station. While the user is in the area, the mobile terminal 100 is in a state where it can detect radio waves from the base stations, but the position measurement unit 120 converts the radio wave strength from each base station into a distance and performs a three-point survey. Then, the position of the user in the area is measured. If the movement detection unit 130 does not detect the movement of the user in the area, the position of the user has not changed. Therefore, the power consumption is suppressed by stopping the continuous scan. Then, when the radio wave detection unit 1102 does not detect the radio wave from the base station for a predetermined time, for example, 20 seconds, it is determined that the user has left the area, the area search mode is set as described above, and the detection mode is set to intermittent scanning. Set and try to detect radio waves from the base station.

Japanese Unexamined Patent Publication No. 2015-64154 Japanese Unexamined Patent Publication No. 2005-117269 Japanese Unexamined Patent Publication No. 2009-44459 JP-A-2009-77354 Japanese Unexamined Patent Publication No. 2014-96673 Japanese Patent No. 5439335 Japanese Unexamined Patent Publication No. 10-66136

Conventionally, in order to reduce the power consumption of the mobile terminal, the detection mode of the base station is set to intermittent scan instead of continuous scan outside the area. This intermittent scan is set to a relatively long cycle of scanning for 2 seconds and waiting for 3 seconds as described above. Therefore, when the user enters the area immediately after entering the standby state, the mobile terminal does not detect the radio wave from the base station until 3 seconds have passed. That is, there is a delay of up to 3 seconds in detecting the user's entry into the area. If the inspection mode is set to continuous scan even outside the area, such a delay does not occur, but the power consumption of the mobile terminal becomes large.

An object of the present invention is to immediately detect a user who has entered an area while maintaining low power consumption of a mobile terminal device.

The position measurement system according to the present invention is a plurality of narrow-area base stations, each of which emits radio waves to a part of an area at regular intervals, and the entire narrow-range base station emits radio waves over the entire area. It has a plurality of narrow-area base stations that transmit, a mobile terminal device carried by a user, and a wide-area base station that continuously transmits radio waves over the entire area, and the mobile terminal device is transmitted from the narrow-area base station. A narrow range radio wave detecting means for detecting transmitted radio waves, a wide area radio wave detecting means for detecting radio waves continuously transmitted from the wide area base station by scanning in a short cycle and intermittently, and radio waves by the wide area radio wave detecting means. Is detected to detect the user's entry into the area, and when the user's entry into the area is detected, the mobile phone is based on the radio wave detection status of the narrow area radio wave detection means. possess a position measuring means for measuring the position of the terminal device, wherein the wide area radio detection means, radio wave transmitting period less a by scan latency is the period of the scan is transmitted from the narrow-area base station The radio wave transmitted from the wide area base station is detected by an intermittent scan set longer than the time required for the operation.

Further, when the movement detection means for detecting the movement of the user in the area and the narrow area radio wave detecting means for detecting the user's entry into the area are detected, the narrow area is detected when the movement of the user is detected. It has a control means for continuously detecting radio waves transmitted from a base station by scanning and stopping scanning when the movement of a user is not detected.

The mobile terminal device according to the present invention is a mobile terminal device carried by a user, each of which is a plurality of narrow-range base stations that periodically transmit radio waves to a part of an area, and is the narrow-range base. A narrow-area radio wave detecting means that detects radio waves transmitted from a plurality of narrow-area base stations that transmit radio waves over the entire area of the entire station, and a short-period and intermittent scan is performed from the wide-area base station to the entire area. Wide-area radio wave detecting means for detecting radio waves continuously transmitted to the area, approach detecting means for detecting the user's entry into the area by detecting the radio waves by the wide-area radio wave detecting means, and the user's approach to the area. When There is sensed, have a, a position measuring means for measuring the position of the portable terminal device based on the radio wave detection situation according to the narrow-area radio detection means, wherein the wide area radio detection means, the period of scanning the The radio wave transmitted from the wide area base station is detected by intermittent scanning which is equal to or less than the transmission cycle of the radio wave transmitted from the narrow area base station and the standby time for scanning is set longer than the scanning time .

The program according to the present invention is a plurality of narrow-area base stations in which a computer mounted on a mobile terminal device carried by a user emits radio waves to a part of an area at regular intervals. A narrow-range radio wave detection means that detects radio waves transmitted from a plurality of narrow-range base stations that transmit radio waves over the entire area of the entire narrow-range base station, and the wide-area base station can be used for short-period and intermittent scanning. Wide area radio wave detecting means for detecting radio waves continuously transmitted over the entire area, approach detecting means for detecting the user's entry into the area by detecting the radio waves by the wide area radio wave detecting means, and the user's entry into the area. When is detected, it functions as a position measuring means for measuring the position of the mobile terminal device based on the detection status of the radio wave by the narrow range radio wave detecting means , and the wide area radio wave detecting means has a narrow scanning cycle. The radio wave transmitted from the wide area base station is detected by intermittent scanning which is equal to or less than the transmission cycle of the radio wave transmitted from the regional base station and the standby time for scanning is set longer than the scanning time .

According to the present invention, it is possible to immediately detect a user who has entered the area while maintaining low power consumption of the mobile terminal device.

Further, the power consumption of the mobile terminal device can be reduced by stopping the scan when the movement of the user is not detected.

It is a schematic block diagram of the area to which one Embodiment of the position measurement system which concerns on this invention is applied. It is a hardware block diagram of the mobile terminal in this embodiment. It is a block block diagram of the mobile terminal in this embodiment. It is a flowchart which showed the position measurement process in this embodiment. It is a figure used to explain the time required to detect the user who entered the area in the prior art. It is a figure used for demonstrating the time required to detect the user who entered the area in this embodiment. It is a block block diagram of the conventional mobile terminal.

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

FIG. 1 is a schematic configuration diagram of an area to which one embodiment of the position measurement system according to the present invention is applied. FIG. 1 shows an area 1 such as a living room used by a resident such as an employee (hereinafter, “user”). Each user always carries a mobile terminal device (hereinafter, simply referred to as a "mobile terminal") 10 such as a smartphone when moving in a facility having an area 1. In area 1, desks 2 used by residents are arranged so as to form an island. A plurality of base stations 3 each of which emits radio waves at regular intervals to a part of the area 1 are installed as narrow-area base stations. The base station 3 is arranged so that the entire base station 3 can transmit radio waves over the entire area 1, and performs short-range wireless communication with the mobile terminal 10 by, for example, Bluetooth. In FIG. 1, each base station 3 is arranged so as to correspond to the position of the island of the desk 2, but if the entire base station 3 can transmit radio waves to the entire area 1, it is not necessary to limit the arrangement to this. In the area 1, a base station 4 that continuously transmits radio waves over the entire area is further installed as a wide area base station. The base station 4 performs wireless communication with the mobile terminal 10 by, for example, Wi-Fi (registered trademark). In the present embodiment, it is assumed that the base station 3 is driven by a built-in battery and the base station 4 is driven by a commercial power source, but the configuration of the power supply means to the base stations 3 and 4 needs to be limited to this. There is no.

In the position measurement system, the configuration for controlling the operation of the base stations 3 and 4 and processing the data exchanged with and from the mobile terminal 10 is omitted from FIG.

FIG. 2 is a hardware configuration diagram of the mobile terminal 10 according to the present embodiment. In the present embodiment, it is assumed that a smartphone (smartphone) is used as the mobile terminal 10, but the present invention is not limited to this, and any device having a hardware configuration described later, such as a tablet terminal or a portable PC, can be used as a smartphone. There is no need to limit it. A computer is mounted on the mobile terminal 10, and the computer includes a CPU 21, a ROM 22, a RAM 23, a storage 24 as a storage means, an operation panel 25 as a user interface means, and a first network interface (IF) as shown in FIG. ) 26, the second network interface (IF) 27, and the acceleration sensor 28 are connected to the internal bus 29. The first network interface 26 is used for wireless communication with the base station 3 by Bluetooth, and the second network interface 27 is used for wireless communication with the base station 4 by Wi-Fi. Be done.

FIG. 3 is a block configuration diagram of the mobile terminal 10 according to the present embodiment. The mobile terminal 10 has a first wireless communication unit 11, a position measurement unit 12, a movement detection unit 13, a control unit 14, a second wireless communication unit 15, and an area approach detection unit 16. The first wireless communication unit 11 is realized by the first network interface 26, and performs short-range wireless communication by Bluetooth with the base station 3. The first wireless communication unit 11 is provided as a wireless communication unit 111 that performs wireless communication with each base station 3 and a narrow-range radio wave detecting means, and detects radio waves transmitted from the base station 3 by scanning. It has a part 112 and. The position measuring unit 12 is provided as a position measuring means, and when the user's entry into the area 1 is detected, the position measuring unit 12 measures the position of the mobile terminal 10 based on the radio wave detection status by the radio wave detecting unit 112. The movement detection unit 13 cooperates with the acceleration sensor 28 to detect the movement of the user in the area 1. The second wireless communication unit 15 performs wireless communication with the base station 4 by Wi-Fi. The second wireless communication unit 15 is realized by the second network interface 27, is provided as a wide area radio wave detecting means and a wireless communication unit 151 that performs wireless communication with the base station 4, and scans intermittently in a short cycle. As a result, it has a radio wave detection unit 152 that detects radio waves continuously transmitted from the base station 4. The area approach detection unit 16 is provided as an approach detection means, and detects the user's entry into the area 1 by detecting the radio wave by the radio wave detection unit 152. The control unit 14 operates in cooperation with the other components 11 to 13, 15 to 16, and controls the entire position measurement in the mobile terminal 10 such as setting the detection mode in the first wireless communication unit 11.

Each of the components 12 to 14 and 16 in the mobile terminal 10 is realized by a cooperative operation of a computer built in the mobile terminal 10 and a program running on the CPU 21 mounted on the computer.

Further, the program used in the present embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a USB memory. The programs provided by the communication means and the recording medium are installed in the computer, and various processes are realized by sequentially executing the programs by the CPU 21 of the computer.

Next, the position measurement process according to the present embodiment, which measures the position of the user in the area 1, will be described with reference to the flowchart shown in FIG. The position measurement process in the present embodiment is repeatedly executed when a predetermined application is started. In addition, each base station 3 emits a radio wave for 10 milliseconds at a cycle of once per second as before. The base station 4 continuously transmits radio waves.

First, when the application is started, the mobile terminal 10 enters the area search mode, and the radio wave detection unit 152 in the second wireless communication unit 15 starts intermittent scanning (step 101). In the intermittent scan, 100 milliseconds is scanned (step 102), and if radio waves from the base station 4 are not detected during that period (N in step 103), the scan is stopped for 900 milliseconds to enter a standby state (step 104). .. Then, when 900 milliseconds have passed, another 100 milliseconds scan is performed (step 102). In this way, the radio wave detection unit 152 attempts to detect the radio wave from the base station 4 every second, but the intermittent scan in the present embodiment scans in a relatively short cycle unlike the conventional intermittent scan. Will do.

The mobile terminal 10 does not operate the radio wave detection unit 112 in order to reduce power consumption in the area exploration mode.

When the user enters the area 1 and the radio wave detection unit 152 detects the radio wave from the base station 4 (Y in step 103), the control unit 14 switches from the area search mode to the position measurement mode. Then, the control unit 14 starts the operation of the first wireless communication unit 11 and sets the detection mode to continuous scan in which the radio wave from the base station 3 is constantly detected (step 105). As a result, the radio wave detection unit 112 in the first wireless communication unit 11 starts detecting the radio wave from the base station 3 by continuous scanning (step 106). The wireless communication units 11 and 15 are switched and used by stopping the operation of the second wireless communication unit 15 in response to the switching to the position measurement mode.

Here, the radio wave detection unit 112 will detect the radio wave from any of the base stations 3 immediately after the user's entry into the area 1 is detected. When the radio wave from the base station 3 is detected (Y in step 107), the position measuring unit 12 converts the radio wave intensity from each base station 3 into a distance and performs a three-point survey in the area 1. The position of the user in is measured (step 108). The measured information about the user's position is stored in the mobile terminal 10 as the measured position information, or is wirelessly transmitted to the outside and used for some processing. For example, the wind direction of the indoor unit is controlled so as to blow the wind to the user in cooperation with the air conditioning system. Alternatively, in cooperation with the lighting system, lighting control is performed such that the lighting is turned on in conjunction with the detection of the entry into the area 1 or only the lighting around the position of the user is turned on.

Further, although the acceleration sensor 28 constantly detects the acceleration, when the movement detection unit 13 detects the movement of the mobile terminal 10 by detecting the change in the value of the acceleration (Y in step 109), the user is in the area. It is judged that the vehicle is moving within 1. Then, the process returns to step 106 in order to continuously measure the current position. On the other hand, when the movement of the user is not detected (N in step 109), it is determined that the user stays at a certain place in the area 1. In this case, since the position of the user does not change, the control unit 14 stops the continuous scan executed by the first wireless communication unit 11 (step 110).

Further, when the radio wave detection unit 112 no longer detects the radio wave from any of the base stations 3 (N in step 107), the user has passed a predetermined time, for example, 20 seconds since the radio wave detection unit 112 stopped detecting the radio wave (step 111). , 112, N), the user determines that he / she has left the area 1, and the control unit 14 switches from the position measurement mode to the area search mode. Then, the radio wave detection unit 152 in the second wireless communication unit 15 starts the intermittent scan as described above (step 101). The power consumption of the mobile terminal 10 is reduced by stopping the operation of the first wireless communication unit 11 in response to the switching to the area exploration mode.

According to the present embodiment, by operating as described above, it is possible to detect a user who has entered the area 1 while maintaining low power consumption of the mobile terminal device. The difference in time required to detect a user who has entered the area 1 will be described with reference to FIG. 5B between the present embodiment and the prior art.

FIG. 5A shows the relationship between the conventional radio wave transmitted from the base station and the detection mode (intermittent scan and continuous scan) in the wireless communication unit 110. Further, FIG. 5B shows the relationship between the radio wave transmitted from the base station 3 and the detection mode (continuous scan) in the first wireless communication unit 11 in the present embodiment, and the radio wave transmitted from the base station 4 and the second radio wave. The relationship with the detection mode (intermittent scan) in the communication unit 15 is shown.

As described above, a conventional base station (narrow-area base station) emits radio waves for 10 milliseconds at regular intervals once per second. On the other hand, the wireless communication unit 110 repeatedly scans for 2 seconds and then stops the scan for 3 seconds. Here, when the user enters the area, the conventional wireless communication unit 110 switches to continuous scanning by detecting radio waves from the base station at the timing of the next scanning in the intermittent scan, and constantly detects the base station. Is controlled. That is, conventionally, as shown in FIG. 5A, the detection mode of the wireless communication unit 110 is switched from the intermittent scan to the continuous scan, but at this time, it takes time d1 to start measuring the position of the user. There will be a delay. If the user enters the area immediately after the 2 second scan is completed, a delay d1 of up to about 3 seconds occurs.

On the other hand, the base station 3 (narrow area base station) in the present embodiment constantly emits radio waves for 10 milliseconds once per second like the conventional base station, and the base station 4 (wide area base station) is Sends radio waves continuously. Here, the second wireless communication unit 15 scans for 100 milliseconds and stops for 900 milliseconds as described above, but the second wireless communication unit 15 in the present embodiment allows the user to enter the area. At that time, in the intermittent scan, the radio wave from the base station 4 is detected at the timing of the next scan. Then, when the radio wave from the base station 4 is detected, the first wireless communication unit 11 is set to continuous scan as the detection mode as shown in FIG. 5B, and starts measuring the position of the user. There will be a delay of time d2 before the measurement of this position is started, and this delay d2 is a maximum of 900 milliseconds.

As described above, there is a difference in the delay that occurs from the user entering the area 1 to the start of the position measurement between the present embodiment and the conventional technique.

In FIG. 5B, when the second wireless communication unit 15 executes the intermittent scan (in the area search mode), the first wireless communication unit 11 stops operating, and when the first wireless communication unit 11 executes the continuous scan (position measurement). (In mode), the second wireless communication unit 15 is shown to stop operating. Then, when a predetermined time (20 seconds) elapses after the user is no longer detected in the area 1, the second wireless communication unit 15 starts the intermittent scan, and the first wireless communication unit 11 is shown to stop the operation. .. By controlling the operations of the wireless communication units 11 and 15 in this way, it is preferable to reduce the power consumption of the mobile terminal 10.

By the way, at first glance, if the intermittent scan cycle in the conventional wireless communication unit 110 is scanned for 100 milliseconds as in the second wireless communication unit 15 of the present embodiment, and the scan cycle is shortened so as to stop for 900 milliseconds. It can be considered good.

However, depending on the timing of the radio wave transmission cycle by the base station (once per second, radio wave transmission for 10 milliseconds) and the radio wave scan cycle of the wireless communication unit 110 (100 millisecond scan, 900 millisecond stop). Since the scan timing of the wireless communication unit 110 does not match the radio wave transmission timing of the base station, there is a possibility that the radio communication unit 110 cannot detect the radio wave from the base station after entering the area of the user.

Therefore, in the present embodiment, the base station 4 that continuously transmits radio waves over the entire area 1 is set as the area 1 separately from the base station 3 and the first wireless communication unit 11 corresponding to the conventional base station and the wireless communication unit. The mobile terminal 10 has a second wireless communication unit 15 that is installed inside and scans intermittently in a short cycle so that the power consumption of the mobile terminal 10 can be reduced and the radio waves from the base station 4 can be detected immediately. I tried to install it in. Further, since the base station 4 that continuously transmits power is supplied with power from a commercial power source, there is no need to worry about power shortage.

In the radio wave detection unit 152 of the present embodiment, the base station is subjected to intermittent scanning in which the scan cycle is equal to or less than the radio wave transmission cycle transmitted from the base station 3 and the scan standby time is set longer than the scanning time. It suffices to detect the radio wave transmitted from 4. Therefore, the intermittent scan cycle of scanning for 100 milliseconds and waiting for 900 milliseconds as described above is an example and is not limited to this setting example. For example, intermittent scanning may be set in a cycle of 150 ms scan and 850 ms wait, or 50 ms scan and 450 ms wait.

In the present embodiment, as described above, the first wireless communication unit 11 performs short-range wireless communication by Bluetooth, and the second wireless communication unit 15 performs wireless communication by Wi-Fi. The wireless communication standard used for communication does not have to be limited to this. Further, in the present embodiment, the second wireless communication unit 15 is provided separately from the first wireless communication unit 11, but the first wireless communication unit 11 is equipped with the function of the second wireless communication unit 15 and is one. The hardware may be configured with a network interface.

Further, in the present embodiment, the entry of the user into the area 1 is detected by the base station 4 and the second wireless communication unit 15, but the entry of the user is detected in cooperation with the entry / exit system. It may be configured.

1 area, 2 desks, 3,4 base stations, 10,100 mobile terminals, 11 1st wireless communication unit, 12,120 position measurement unit, 13,130 movement detection unit, 14,140 control unit, 15 2nd wireless communication Unit, 16 area approach detection unit, 21 CPU, 22 ROM, 23 RAM, 24 storage, 25 operation panel, 26 1st network interface (IF), 27 2nd network interface (IF), 28 acceleration sensor, 29 internal bus, 110,111,151,1101 wireless communication unit, 112,152,1102 radio wave detection unit.

Claims (4)

Each is a plurality of narrow-area base stations that emit radio waves to a part of an area at regular intervals, and a plurality of narrow-area base stations that transmit radio waves to the entire area of the entire narrow-area base station. ,
Mobile terminal devices carried by users and
A wide-area base station that continuously transmits radio waves over the entire area,
Have,
The mobile terminal device is
A narrow-range radio wave detecting means for detecting radio waves transmitted from the narrow-range base station,
Wide-area radio wave detection means that detects radio waves continuously transmitted from the wide-area base station by scanning in a short cycle and intermittently.
An intrusion detection means that detects the user's entry into the area by detecting radio waves by the wide area radio wave detection means, and
When the user's entry into the area is detected, the position measuring means for measuring the position of the mobile terminal device based on the radio wave detection status by the narrow range radio wave detecting means, and the position measuring means.
Have a,
The wide area radio wave detecting means transmits from the wide area base station by intermittent scanning in which the scan cycle is equal to or less than the transmission cycle of the radio waves transmitted from the narrow area base station and the standby time for scanning is set longer than the scanning time. A position measurement system characterized by detecting radio waves to be generated . A movement detecting means for detecting the movement of the user in the area,
When the user's entry into the area is detected, the narrow-range radio wave detecting means continuously detects the radio waves transmitted from the narrow-range base station by scanning when the movement of the user is detected, and the user. Control means to stop scanning when no movement is detected,
The position measurement system according to claim 1, wherein the position measurement system is characterized by having. In a mobile terminal device carried by a user
Each is a plurality of narrow-area base stations that emit radio waves to a part of the area at regular intervals, and the entire narrow-area base station transmits radio waves from a plurality of narrow-area base stations that transmit radio waves to the entire area. Narrow range radio wave detection means to detect radio waves
Wide-area radio wave detection means that detects radio waves continuously transmitted from a wide-area base station over the entire area by scanning in a short cycle and intermittently.
An intrusion detection means that detects the user's entry into the area by detecting radio waves by the wide area radio wave detection means, and
When the user's entry into the area is detected, the position measuring means for measuring the position of the mobile terminal device based on the radio wave detection status by the narrow range radio wave detecting means, and the position measuring means.
Have a,
The wide area radio wave detecting means transmits from the wide area base station by intermittent scanning in which the scan cycle is equal to or less than the transmission cycle of the radio wave transmitted from the narrow area base station and the standby time for scanning is set longer than the scanning time. A mobile terminal device characterized by detecting radio waves to be generated . A computer mounted on a mobile terminal device carried by a user
Each is a plurality of narrow-area base stations that emit radio waves to a part of the area at regular intervals, and the entire narrow-area base station transmits radio waves from a plurality of narrow-area base stations that transmit radio waves to the entire area. Narrow range radio wave detection means to detect radio waves
Wide-area radio wave detection means that detects radio waves continuously transmitted from a wide-area base station over the entire area by scanning in a short cycle and intermittently.
An intrusion detection means that detects a user's entry into the area by detecting radio waves by the wide area radio wave detection means.
When the user's entry into the area is detected, the position measuring means for measuring the position of the mobile terminal device based on the radio wave detection status by the narrow area radio wave detecting means.
To function as,
The wide area radio wave detecting means transmits from the wide area base station by intermittent scanning in which the scan cycle is equal to or less than the transmission cycle of radio waves transmitted from the narrow area base station and the standby time for scanning is set longer than the scanning time. A program characterized by detecting radio waves to be generated .

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