JP2007259017A - Wireless communication system, wireless communication method, transmission control device, and communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately set up an area to limit the operation of a communication device which perform wireless communication therein wherever it is and thereby surely control the operation of the communication device in that area. <P>SOLUTION: The wireless communication system includes a plurality of transmitters 10-1 to 10-4 which produce electric waves for position detection for detecting the position of the communication device 20. The wireless communication system also includes a detector which detects the position of the communication device 20 based on a plurality of electric waves for position detection, when the communication device 20 receives the plurality of electric waves for position detection produced by the plurality of transmitters 10-1 to 10-4; and a processor which operates in a predetermined operation mode according to the position of the communication device 20 detected by the detector. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for controlling an operation mode of a communication apparatus that performs wireless communication in a predetermined area.

In recent years, the number of owners of communication devices (communication terminals) that perform wireless communication, such as mobile phones, has increased rapidly. In public transportation, medical institutions, movie theaters, theaters, etc., There is a demand to restrict the operation of the wireless communication function and the like.
If you want to restrict the wireless communication function of the communication device in the facility, block the radio wave so that the radio wave used for the wireless communication (for example, the radio wave from the base station in the case of a mobile phone) does not reach the facility. It is possible to do.

For example, when the use of a mobile phone in a train is restricted, it may be possible to take measures to prevent radio waves from a base station or the like from reaching the train by using glass that does not transmit radio waves to the train.
According to this measure, it is possible to restrict calls using mobile phones. However, in a mobile phone, if the radio wave is cut off, the output of the radio wave transmitted by the mobile phone itself increases, and such a measure cannot limit the output of the radio wave.

Therefore, a technique for acquiring position information of a communication apparatus using GPS (Global Positioning System) and restricting the use of the communication apparatus using the acquired position information (for example, refer to Patent Document 1 below) or a communication apparatus. There is a technique in which a transmitter that transmits a radio wave including a specific signal for restricting use (switching to a desired operation mode) is provided in an area where use of a communication device is desired to be restricted (for example, see Patent Document 2 below). .
JP 2002-209243 A JP 2004-193867 A

However, like the technique of Patent Document 1, a technique using GPS cannot be used in a place where radio waves from an artificial satellite are difficult to reach or do not reach, such as a place with a roof or underground. For example, it is difficult to use the technique of Patent Document 1 in a train that travels in a tunnel or a subway that travels underground.
Further, as in the technique of Patent Document 2 described above, in a technique in which a transmitter for transmitting a radio wave including a specific signal for causing a communication device to switch to a desired operation mode is provided in an area where use of the communication device is desired to be restricted, Since it is impossible to finely set the transmission area of the radio wave transmitted from the device, it is difficult to accurately set the area where the use of the communication device is desired to be restricted.

For example, when a transmitter is installed in a train and the inside of the train is set as a restricted use area, when the train is stopped at a station platform, There is a possibility that a home that is not a restricted use area will become a restricted use area because the radio wave arrives.
In addition, when a plurality of transmitters are provided, there is a risk that a valley may be formed between the transmission areas of radio waves from the plurality of transmitters. In this valley, radio waves do not reach and the use of the communication device cannot be restricted.

  The present invention has been devised in view of such a problem, and in any place, an area for restricting the operation of a communication apparatus that performs wireless communication can be set with high accuracy. It is an object of the present invention to ensure that the management of the operation of the communication device can be executed reliably.

  In order to achieve the above object, a wireless communication system of the present invention includes a communication device for performing wireless communication, and a plurality of transmissions for transmitting position detection radio waves for causing the communication device to detect the position of the communication device. And detecting the position of the communication device based on the plurality of received position detection radio waves when the communication device receives the position detection radio waves transmitted from the plurality of transmitters. And a processing unit that operates in a predetermined operation mode according to the management area based on the position of the communication device detected by the detection unit (Claim 1). ).

  The plurality of transmitters are configured to transmit radio waves indicating a specific area in the management area as the position detection radio waves, and the processing unit of the communication device is detected by the detection unit. A determination unit configured to determine whether or not the position of the communication device is within the specific region; and an operation mode determination unit configured to determine the predetermined operation mode according to a determination result by the determination unit. (Claim 2).

  In order to achieve the above object, the wireless communication method of the present invention is a transmission that transmits a position detection radio wave from each of a plurality of transmitters to cause a communication device capable of wireless communication to detect the position of the communication device. And a detection procedure for detecting the position of the communication device based on the received plurality of position detection radio waves when the communication device receives the position detection radio waves transmitted from the plurality of transmitters. And an operation procedure that operates in a predetermined operation mode according to the management area based on the position of the communication device detected in this detection procedure.

In order to achieve the above object, the transmission control device of the present invention is connected to a plurality of transmitters that transmit a position detection radio wave for causing a communication device to detect the position of the communication device, and The plurality of transmitters are controlled so as to transmit a radio wave indicating a specific area in which the communication device performs a predetermined operation as a radio wave (Claim 4).
In order to achieve the above object, the communication device of the present invention can receive a position detection radio wave transmitted from each of a plurality of transmitters provided in a management area in which the operation of the communication device is to be managed. When the position detection radio waves transmitted from the plurality of transmitters are received, the detection unit detects the position of the communication device based on the received plurality of position detection radio waves, and this detection And a processing unit that operates in a predetermined operation mode according to the position of the communication device detected by the unit (Claim 5).

  Thus, according to the present invention, when the detection unit of the communication device receives each of the position detection radio waves from the plurality of transmitters, the terminal position of the communication device is based on the received plurality of position detection radio waves. Since the processing unit of the communication device operates in a predetermined operation mode corresponding to the management area based on the terminal position detected by the detection unit, the detection unit always determines the terminal position of the communication device with high accuracy. The processing unit can reliably operate in a desired operation mode according to the terminal position.

  In addition, according to the present invention, by providing the transmitter in the management area, the terminal position of the communication device cannot be detected due to reasons such as no radio wave reaching, as in the technique of Patent Document 1 described above. So that the detection unit can reliably detect the terminal position in the management area, and as a result, the operation of the processing unit of the communication device based on the terminal position can be reliably managed (restricted). Become.

  Furthermore, according to the present invention, the detection unit can reliably detect the terminal position, and the processing unit can reliably operate in a predetermined operation mode based on the terminal position. Can be set with high accuracy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[1] One Embodiment of the Present Invention First, the configuration of a wireless communication system 1 as one embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, the wireless communication system 1 includes a hollow rectangular parallelepiped structure (here, a train car) 2 and a plurality of (four or more; here four) transmissions provided in the structure 2. Devices (transmitters) 10-1 to 10-4, a transmission control device (transmission control unit) 11, and a mobile phone 20 as a communication device (communication terminal) that performs wireless communication.

In the wireless communication system 1, all areas in the train car (hereinafter simply referred to as vehicle) 2 are management areas in which the operation of the mobile phone (hereinafter simply referred to as terminal) 20 should be managed. Restricts the operation of the terminal 20 in a predetermined specific area (hereinafter referred to as a use restriction area) R in the management area (here, the wireless communication function is stopped).
Each of the plurality of transmitting devices 10-1 to 10-4 (hereinafter, simply referred to as the transmitting device 10 unless otherwise distinguished from each other) is connected to the terminal 20 A position detection radio wave (see FIG. 2 described later) for detecting 20 positions (terminal positions) is transmitted.

The position of the terminal 20 is a relative three-dimensional coordinate with respect to the origin Q (Q (x, y, z) = (0, 0, 0)) set in front of the lower left side of the vehicle 2 shown in FIG. is there. In the following description, the position means a three-dimensional coordinate with respect to the origin Q.
Here, the data structure of the position detection radio waves transmitted from each of the plurality of transmission devices 10 will be described with reference to FIG. 2. The following information (a) to (f) is included in the position detection radio waves. include.

(A) A group number (HEX (1 digit)) as information for specifying a management area (in this case, in the vehicle 2).
(B) Device number (HEX 1 digit) for identifying itself (the transmitting device).
(C) The position (transmitting device position; 6 digits of HEX) of itself (the transmitting device).
(D) Use restriction area R (HEX 12 digits) for restricting the operation of the terminal 20.

(E) Transmission time of the position detection radio wave (6 digits of HEX).
(F) Checksum (HEX 1 digit).
Note that the transmission device position in (c) is position information (three-dimensional coordinates (x, y, z)) relative to the origin Q in the management area, and the ratio of x, y, z is equal. For example, when x is “1 cm = 1”, y and z are also “1 cm = 1”.

Further, the use restriction area R of (d) is composed of the positions of two vertices R1 and R2 as information indicating a region (use restriction area) R indicated by a broken line in FIG.
Here, since the use restriction area R is a rectangular parallelepiped, by using the two vertices R1 and R2 on the diagonal as information indicating the use restriction area R, the terminal 20 is based on the positions of the vertices R1 and R2. The restricted use area R can be recognized.

Further, as shown in FIG. 1, the transmission control device 11 controls the transmission of position detection radio waves by a plurality of transmission devices 10, and includes a reference clock 12 as shown in FIG. .
The reference clock 12 is for determining the transmission time of (e) of the position detection radio waves transmitted by the plurality of transmission devices 10.

  Then, the transmission control device 11 sends a transmission request signal to each of the plurality of transmission devices 10 together with the transmission time of each of the plurality of transmission devices 10 based on the reference clock 12 in order to transmit a position detection radio wave. Transmission is performed using the signal lines 13-1 to 13-4. Thus, each of the plurality of transmission devices 10 transmits a position detection radio wave when receiving a transmission request signal from the transmission control device 11.

  Here, it is preferable that these signal lines 13-1 to 13-4 are configured to have the same length, whereby the transmission control device 11 transmits the transmission request signal and the transmission time. Time until reaching each of the plurality of transmission devices 10 is the same, and as a result, the transmission device 10 that has received the transmission request signal after the transmission control device 11 transmits the transmission request signal. The time until the position detection radio wave is transmitted is the same in all of the plurality of transmission devices 10.

As a result, a slight error between the transmission time determined by the transmission control device 11 and the time at which the plurality of transmission devices 10 actually transmit the transmission times as position detection radio waves is all the transmission devices 10-1. As a result, the terminal position can be detected with high accuracy by the mobile phone 20.
Further, as shown in FIG. 4, the transmission control device 11 is configured to sequentially transmit a transmission request signal to a plurality of transmission devices 10-1 to 10-4 at a predetermined time interval (here, 100 ms). Each of the transmitting devices 10 is configured to sequentially transmit a position detection radio wave when receiving a transmission request signal from the transmission control device 11.

  As described above, each of the transmission lines 13-1 to 13-4 is configured with the same length, so that the transmission control device 11 transmits the transmission interval of the position detection radio waves from each transmission device 10. This is the same as a predetermined time interval (here, 100 ms) at which the request signal is transmitted, whereby the terminal position detection process by the terminal 20 that receives the position detection radio wave can be stably executed at the predetermined time interval.

As illustrated in FIG. 5, the terminal 20 includes a receiving unit 21, a transmitting unit 22, a detecting unit 23, and a processing unit 26.
The receiving unit 21 receives radio waves via an antenna (not shown), and receives at least position detection radio waves from a plurality of transmitting devices 10.
Note that the receiving unit 21 may receive radio waves for normal processing of the terminal 20 (call and reception of electronic information).

The transmission unit 22 transmits (transmits) radio waves via an antenna, and the transmission unit 22 transmits radio waves for the original processing (call and transmission of electronic information) of the terminal 20. Good.
When the reception unit 21 receives the position detection radio waves transmitted from the plurality of transmission devices 10, the detection unit 23 receives a plurality of (here, four) position detection radio waves received by the reception unit 21. It detects its own position (terminal position).

Note that each time the receiving unit 21 receives a position detection radio wave from any of the plurality of transmitting devices 10, the detection unit 23 first determines whether or not the position detection radio wave has been normally received. Inspection is performed using a checksum of the detection radio wave (information (f) above).
Further, the detection unit 23 calculates the use restriction area R based on the information (coordinates of the vertices R1 and R2) indicating the use restriction area R included in the position detection radio waves of any of the plurality of transmission devices 10. recognize.

The detection unit 23 includes a propagation time calculation unit (calculation unit) 24 and a dedicated clock 25.
The propagation time calculation unit 24 receives the position detection radio wave (more specifically, every time the detection unit 23 confirms that the position detection radio wave has been normally received). The propagation time from the transmitting device 10 to the terminal 20 of the position detecting radio wave from when the detecting radio wave is transmitted from the transmitting device 10 to when the receiving unit 21 receives the calculated radio wave is calculated.

Specifically, the propagation time calculation unit 24 transmits the position detection radio wave transmission time indicated by the position detection radio wave (information of (e) above), and the position detection radio wave reception time based on the dedicated clock 25. Then, the propagation time of the position detection radio wave is calculated by subtracting the reception time from the transmission time.
Then, the detection unit 23 receives the position detection radio waves from all the transmitting devices 10-1 to 10-4, and when the propagation time calculation unit 24 calculates the propagation times of all these position detection radio waves, Calculate the position.

That is, the detection unit 23 determines the propagation speed of the position detection radio waves from the plurality of transmission devices 10 c and the propagation times calculated by the propagation time calculation units 24 applied to the four transmission devices 10-1 to 10-4. , T ₁ , t ₂ , t ₃ , t ₄ , the time error between the reference clock 12 and the dedicated clock 25, Δt, and the transmitter positions of the four transmitters 10-1 to 10-4 (position detection radio waves) each of the above (c) information) contained in the order _{(x 1, y 1, z} 1), (x 2, y 2, z 2), (x 3, y 3, z 3), (x 4 , Y ₄ , z ₄ ), the terminal position (x, y, z) is calculated based on the following equations (1) to (4).

(Ct ₁ −cΔt) ² = (x−x ₁ ) ² + (y−y ₁ ) ² + (z−z ₁ ) ²
... (1)
(Ct ₂ −cΔt) ² = (x−x ₂ ) ² + (y−y ₂ ) ² + (z−z ₂ ) ²
... (2)
(Ct ₃ −cΔt) ² = (x−x ₃ ) ² + (y−y ₃ ) ² + (z−z ₃ ) ²
... (3)
(Ct ₄ −cΔt) ² = (x−x ₄ ) ² + (y−y ₄ ) ² + (z−z ₄ ) ²
... (4)
In this way, the detection unit 23 solves the four simultaneous equations (1) to (4) by substituting information based on the position detection radio waves from each of the plurality of transmission devices 10 into one equation, respectively. To calculate the terminal position (x, y, z).

  In the above formulas (1) to (4), the time error Δt between the reference clock 12 and the dedicated clock 25 is also an unknown number, and the detection unit 23 is positioned from the four transmitting devices 10-1 to 10-4. By making four simultaneous equations based on the detection radio wave, the terminal position (x, y, z) in consideration of this time error Δt can be calculated. As a result, the calculated terminal position (x, y, z) is very accurate.

In other words, in order for the detection unit 23 to calculate the exact terminal position (x, y, z) based on the time error Δt, the wireless communication system 1 includes four transmitting devices 10-1 to 10-4. In addition, the detection unit 23 calculates the terminal position (x, y, z) by solving the four simultaneous equations (1) to (4).
The processing unit 26 operates in a predetermined operation mode corresponding to the management area based on the terminal position of the terminal 20 detected by the detection unit 23, and includes a determination unit 27, an operation mode determination unit 28, and a switching unit 29. Is configured.

  The determination unit 27 determines whether or not the terminal position detected by the detection unit 23 is within the use restriction area R, and the use restriction area R included in the position detection radio waves of the plurality of transmission devices 10. Whether or not the terminal position (x, y, z) calculated by the detection unit 23 is within the region R specified by the two vertices R1, R2 based on the information indicating (information of (d) above) Determine whether.

  The operation mode determination unit 28 determines a predetermined operation mode to be taken by the processing unit 26 according to the determination result by the determination unit 27, and the terminal position (x, y, z) is restricted by the determination unit 27. When it is determined that it is in the area R, the operation mode for limiting the wireless communication function using the reception unit 21 and the transmission unit 22 (particularly the transmission unit 22) is a predetermined operation mode that the processing unit 26 should take. Determine that there is. Here, as an operation mode for limiting the wireless communication function, an operation mode for stopping output of radio waves by the transmission unit 22 is determined.

On the other hand, when the determination unit 27 determines that the terminal position (x, y, z) is within the use restriction area R, the operation mode determination unit 28 selects a normal operation mode that does not limit the wireless communication function, It determines that it is the predetermined | prescribed operation | movement aspect which the process part 26 should take.
The switching unit 29 switches the operation mode of the processing unit 26 to the operation mode determined by the operation mode determination unit 28.

  Here, the operation procedure of the detection unit 23 and the processing unit 26 will be described with reference to the flowchart shown in FIG. 6 (steps S1 to S6). First, each of the plurality of transmission devices 10 transmits a position detection radio wave. (Sending procedure) When the receiving unit 21 receives the position detecting radio waves from the transmitting device 10 (step S1), the detecting unit 23 checks that the position detecting radio waves have been received normally (the above ( f) information), and based on the group number (information (a) above) and device number (information (b) above) included in the position detection radio wave, the same group ( Here, radio waves for position detection are received from each of four transmitting devices 10-1 to 10-4 which are different from each other in a management area (vehicle 2). Determines whether (step S2).

That is, the detection unit 23 determines whether four position detection radio waves have been received from all of the plurality of transmission devices 10-1 to 10-4 based on the group number and the device number.
Here, if the position detection radio waves are not yet received from all the transmitting devices 10-1 to 10-4 (No route in Step S2), the process returns to the standby state before Step S1, while If the position detection radio waves are received from all the transmitting devices 10-1 to 10-4 (Yes route of step S2), the detection unit 23 is based on the above formulas (1) to (4). The terminal position is calculated (step S3; detection procedure).

That is, when the detection unit 23 confirms that the position detection radio waves have been received from all the transmission devices 10-1 to 10-4 (here, four position detection radio waves have been received), Perform the calculation.
When the terminal position is calculated by the detection unit 23, the determination unit 27 of the processing unit 26 determines whether or not the calculated terminal position of the terminal 20 is within the use restriction area R. A determination is made based on information (information in (d) above) designating any use restricted area R in radio waves (step S4; determination procedure).

  Here, when the determination unit 27 determines that the terminal position of the terminal 20 is within the use restriction area R (Yes route in step S4), the operation mode for limiting the wireless communication function is determined by the operation mode determination unit 28 ( Operation mode determination procedure), the switching unit 29 switches the operation of the processing unit 26 to the determined operation mode (here, the output radio wave is stopped by the transmission unit 22) (step S5), and enters the standby state before step S1. Return.

  On the other hand, when the determination unit 27 determines that the terminal position of the terminal 20 is not within the use restriction area R (No route in step S4), the operation mode is determined by the operation mode determination unit 28, and the switching unit 29 is changed to the processing unit 26. Is switched to the determined operation mode (in this case, the normal operation mode in which the transmission unit 22 outputs radio waves) (step S6), and the process returns to the standby state before step S1.

  The process of step S6 is a process of switching the operation mode to a normal one if the processing unit 26 has taken an operation mode in which the wireless communication function is limited before the process. If the processing unit 26 has taken the normal operation mode before, the operation mode is not switched by the switching unit 29 and is maintained as it is.

  As described above, according to the wireless communication system 1 as an embodiment of the present invention, a plurality (four in this case) of transmitting devices 10 that transmit position detection radio waves are provided in the vehicle 2 that is a management area, When the detection unit 23 of the terminal 20 receives each of the position detection radio waves from the plurality of transmitting devices 10, the terminal position of the terminal 20 in the management area is calculated based on the received plurality of position detection radio waves ( Detection procedure), since the processing unit 26 of the terminal 20 operates in an operation mode corresponding to the terminal position (operation procedure), the detection unit 23 must always detect the terminal position of the terminal 20 (self) with high accuracy. The processing unit 26 can reliably operate in a desired operation mode according to the terminal position.

  That is, according to the wireless communication system 1 as an embodiment of the present invention, since a plurality of transmitting devices 10 are provided in the management area, for example, radio waves do not reach as in the technique of Patent Document 1 described above. The terminal position of the terminal 20 cannot be detected for the reason, and the detection unit 23 can reliably detect the terminal position. As a result, the management (limitation) of the operation of the processing unit 26 of the terminal 20 based on the terminal position. Can be performed reliably.

Furthermore, the processing unit 26 can reliably operate in a predetermined operation mode according to the terminal position detected by the detection unit 23, that is, the use restriction area R that restricts the operation in the management area can be set with high accuracy. .
In addition, according to this radio | wireless communications system 1, since the four transmitters 10 are provided and the detection part 23 detects a three-dimensional position, the use restriction area R which considered not only a plane but the height can be set. Therefore, when the wireless communication system 1 is applied to a building such as a building, a use restriction area can be set for each floor in consideration of the floor, for example.

  Further, each of the plurality of transmission devices 10 transmits a radio wave indicating the transmission device position of the transmission device 10 and the transmission time of the position detection radio wave as a position detection radio wave, and the detection unit 23 includes a plurality of transmission devices. Since the terminal position is detected based on the ten transmitting device positions and the propagation time based on the transmission time, the detection unit 23 can detect the terminal position reliably and with high accuracy.

Further, since the detection unit 23 detects the terminal position based on the time difference Δt between the reference clock 12 provided in the transmission control device 11 and the dedicated clock 25 for detecting the reception time of the position detection radio wave, The terminal position can be detected with high accuracy.
Further, a plurality of transmitting devices 10 transmit radio waves (vertices R1, R2) indicating the use restricted area R as position detection radio waves, and the processing unit 26 detects the terminal position detected by the detection unit 23, and the position detection Since the operation is performed in a predetermined operation mode based on the use restriction area R included in the radio wave (that is, the use restriction area R recognized from the vertices R1 and R2), the use restriction area R is set with very high accuracy. be able to.

That is, since the transmission device 10 designates the use restriction area R by the coordinate point, the use restriction area R can be set very finely.
Moreover, when the use restricted area R is a rectangular parallelepiped, the use restricted area R can be easily changed only by changing the coordinates of the vertices R1 and R2, so that the versatility is very high. For example, the use restriction area R can be easily changed (cancelled, enlarged, reduced, moved, etc.) depending on the time zone.

Further, the determination unit 27 of the processing unit 26 of the terminal 20 determines whether or not the terminal position calculated by the detection unit 23 is within the use restriction area R included in the position detection radio wave, and the operation mode determination unit 28 determines a predetermined operation mode according to the determination result of the determination unit 27, so that the processing unit 26 can be reliably operated in a desired operation mode.
Further, the plurality of transmitting devices 10 transmit radio waves indicating the group numbers to which the transmitting device 10 belongs (that is, as information for specifying the management area) as position detection radio waves, and the detecting unit 23 Based on the group number of the position detection radio wave, it is determined whether or not the position detection radio waves have been received from a predetermined number (four in this case) of the transmitters 10 in the same group, so that more reliable operation management is executed. be able to.

  That is, even in a vehicle adjacent to the vehicle 2, when the wireless communication system 1 is applied, a position detection radio wave indicating a use restriction area R ′ (not shown) of a different management area is transmitted nearby. Even if the receiving unit 21 has received the position detection radio wave indicating the use restricted area R ′ of this different management area, the detecting unit 23 determines the transmission source based on the group number. It is possible to prevent erroneous position detection and operation management based on the position detection radio wave.

  In other words, by including the group number in the position detection radio wave transmitted by the transmission device 10, it is possible to limit the use of another group (that is, use in different management areas) without considering the reception range or the like by the reception unit 21 of the terminal 20. A transmission device 10 ′ (not shown) (designating an area R ′) can be disposed adjacent to the transmission device 10, and a plurality of restricted use areas R, R ′ can be provided in one vehicle 2, It is possible to provide use restriction areas R and R ′ in continuous vehicles (management areas).

  In addition, when this radio | wireless communications system 1 is applied to the vehicle 2, the vehicle 2 may pass another train vehicle, and in that case, the position detection radio wave from the transmitting device 10 'provided for the other vehicle. However, even in this case, by including the group number in the position detection radio wave, erroneous detection of the terminal position and incorrect operation management are performed. It wo n’t happen.

  A plurality of transmitting devices 10 transmit a radio wave indicating the device number of the transmitting device 10 as a position detecting radio wave, and the detection unit 23 determines a predetermined number (here, 4) based on the device number of the position detecting radio wave. Therefore, it is possible to perform more reliable operation management.

[2] Modifications of the Invention It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
Below, the 1st-3rd modification of this invention and another modification are demonstrated.
[2-1] First Modification of the Present Invention In the embodiment described above, an example in which the four transmission devices 10 are provided and the detection unit 23 is configured to detect a three-dimensional position as the terminal position will be described. However, the present invention is not limited to this. For example, as shown in FIG. 7, three or more (here, three) transmitters 10-1 to 10-3 are provided and based on a two-dimensional position. You may comprise so that a process may be performed.

  That is, in the wireless communication system 1a as the first modified example of the present invention, the transmitting device 10 transmits two vertices Ra1 and Ra2 as the use restricted area Ra in the position detection radio wave. That is, a two-dimensional rectangular use restriction area Ra that does not consider the height direction (z-axis direction) is set, and the detection unit 23a of the terminal 20a performs position detection radio waves from the three transmission devices 10 as shown in FIG. The two-dimensional terminal position (x, y) is calculated using the following equations (5) to (7). In the following formulas (5) to (7), the same reference numerals as those described above indicate the same or substantially the same ones.

(Ct ₁ −cΔt) ² = (x−x ₁ ) ² + (y−y ₁ ) ² (5)
(Ct ₂ −cΔt) ² = (x−x ₂ ) ² + (y−y ₂ ) ² (6)
(Ct ₃ −cΔt) ² = (x−x ₃ ) ² + (y−y ₃ ) ² (7)
Thereby, according to the radio | wireless communications system 1a as a 1st modification of this invention, except having performed various processes in two dimensions, the effect similar to the radio | wireless communications system 1 as one Embodiment of this invention mentioned above is mentioned. Can be obtained.

[2-2] Second Modification of the Invention In the above-described embodiment, the four transmission devices 10 are provided, and the detection unit 23 is based on the time error Δt between the basic timepiece 12 and the dedicated timepiece 25. Although an example in which the terminal position of the terminal 20 is configured to be detected has been described, the present invention is not limited to this. For example, as shown in FIG. 8, three or more (here, three) The transmitters 10-1 to 10-3 may be provided, and the process may be executed without considering the time error Δt.

  That is, in the wireless communication system 1b as the second modified example of the present invention, the detection unit 23b of the terminal 20b is based on the position detection radio waves from the three transmission devices 10 as shown in FIG. ~ (10) are used to calculate the terminal position (x, y, z). In the following formulas (8) to (10), the same reference numerals as those described above indicate the same or substantially the same ones.

(Ct ₁ ) ² = (x−x ₁ ) ² + (y−y ₁ ) ² + (z−z ₁ ) ² (8)
(Ct ₂ ) ² = (x−x ₂ ) ² + (y−y ₂ ) ² + (z−z ₂ ) ² (9)
(Ct ₃ ) ² = (x−x ₃ ) ² + (y−y ₃ ) ² + (z−z ₃ ) ² (10)
Thereby, according to the radio | wireless communications system 1b as a 2nd modification of this invention, the effect | action similar to the radio | wireless communications system 1 as one Embodiment of this invention mentioned above except not considering the error (DELTA) t of this time is mentioned. An effect can be obtained.

  Furthermore, according to the wireless communication system 1b, the number of transmitting devices 10 can be reduced and the cost can be reduced by reducing hardware resources, compared to the wireless communication system 1 as an embodiment of the present invention described above. can do.

[2-3] Third Modification of the Invention Further, as a third modification of the present invention, the above-described first modification is a modification of the above-described second modification to the above-described embodiment of the present invention. You may apply. That is, as shown in FIG. 9, the wireless communication system 1c as the third modified example of the present invention includes two or more (here, two) transmitting devices 10-1 and 10-2 and is based on a two-dimensional position. While executing the process, the process may be executed without considering the time difference Δt between the basic clock 12 and the dedicated clock 25.

That is, as shown in FIG. 5, the detection unit 23c of the terminal 20c uses the following equations (11) and (12) based on the position detection radio waves from the two transmission devices 10 to determine the terminal position (x, y). Is configured to calculate. In the following formulas (11) and (12), the same reference numerals as those described above indicate the same or substantially the same ones.
(Ct ₁ ) ² = (x−x ₁ ) ² + (y−y ₁ ) ² (11)
(Ct ₂ ) ² = (x−x ₂ ) ² + (y−y ₂ ) ² (12)
Thereby, according to the radio | wireless communications system 1c as a 3rd modification of this invention, except not considering the time difference | error (DELTA) t, it is the same as that of the radio | wireless communications system 1a as a 1st modification of this invention mentioned above. An effect can be obtained.

  Furthermore, according to the wireless communication system 1c, the number of transmitting devices 10 can be reduced compared to the above-described wireless communication system 1a as the first modification of the present invention, thereby reducing hardware resources and reducing the cost. Can be

[2-4] Other Modifications Further, in the above-described embodiment, an example in which each of the plurality of transmission devices 10 transmits the position detection radio wave including the use restriction area R (R ′, Ra) is given. As described above, the present invention is not limited to this. For example, the terminal 20 (20a to 20c) does not include the use restriction area R (R ′, Ra) in the position detection radio wave and the use restriction area R is not included. (R ′, Ra) may be stored or acquired via the Internet or the like.

Further, for example, only one of the plurality of transmitters 10 may be configured to transmit the position detection radio wave including the use restriction area R (R ′, Ra).
In the above-described embodiment, a mobile phone has been described as an example of the communication device 20 (20a to 20c). However, the present invention is not limited to this, and the communication device 20 performs wireless communication. Any terminal can be used.

Further, in the above-described embodiment, the example in which the use restriction area R (R ′, Ra) designated by the plurality of transmission devices 10 is one has been described, but the present invention is not limited to this. The transmitting device 10 in one group may be configured to specify a plurality of restricted use areas R (R ′, Ra).
In the above-described embodiment, the transmission control device 11 is provided and each of the plurality of transmission devices 10 is controlled by the transmission control device 11 so as to transmit a position detection radio wave. However, the present invention is not limited to this, and without the transmission control device 11, each of the plurality of transmission devices 10 includes the basic clock 12, and each transmission device independently transmits a position detection radio wave. You may comprise as follows.

  In the above-described embodiment, the operation mode of stopping the output of radio waves has been described as an example of the predetermined operation mode of the terminal 20 in the use restricted area R (R ′, Ra). However, the present invention is not limited to this, and the predetermined operation mode in the use restriction area R (R ′, Ra) can be variously set for all operations that the terminal 20 can take. For example, the start or prohibition of activation of the application program executed by the processing unit 26, or power on / off of the terminal 20 or transition to the hibernation state of the terminal 20 may be set as a predetermined operation mode.

Further, in the above-described embodiment, the train vehicle has been described as an example of the structure 2 in the wireless communication systems 1 and 1a to 1c. However, the present invention is not limited to this, and the structure 2 in the present invention is not limited thereto. As long as it is a structure such as a public transport other than a train, a building, or a building.
In addition, as demonstrated in embodiment mentioned above, the radio | wireless communications systems 1,1a-1c of this invention are not necessarily applied with respect to a structure, The outdoor predetermined | prescribed area | regions, such as an amusement park and a theme park, are not used. It can also be applied as a management area.

  Further, the functions as the detection units 23, 23a to 23c, the propagation speed calculation unit 24, the processing unit 26, the determination unit 27, the operation mode determination unit 28, and the switching unit 29 described above are performed by computers (terminals 20, 20a to 20c). Alternatively, it may be realized by a CPU (Central Processing Unit), an information processing device, and various terminals in the terminals 20 and 20a to 20c executing a predetermined application program (operation control program).

  The program is, for example, a computer such as a flexible disk, CD (CD-ROM, CD-R, CD-RW, etc.), DVD (DVD-ROM, DVD-RAM, DVD-R, DVD-RW, DVD + R, DVD + RW, etc.). It is provided in a form recorded on a readable recording medium. In this case, the computer reads the operation control program from the recording medium, transfers it to the internal storage device or the external storage device, and uses it.

Further, the program may be recorded in a storage device (recording medium) such as a magnetic disk, an optical disk, or a magneto-optical disk, and provided from the storage device to a computer via a communication line.
Here, the computer is a concept including hardware and an OS (operating system) and means hardware that operates under the control of the OS. Further, when the OS is unnecessary and the hardware is operated by the application program alone, the hardware itself corresponds to the computer. The hardware includes at least a microprocessor such as a CPU and means for reading a computer program recorded on a recording medium.

  The application program as the operation control program is a computer such as that described above, as detection units 23, 23a to 23c, propagation velocity calculation unit 24, processing unit 26, determination unit 27, operation mode determination unit 28, and switching unit 29. The program code that realizes the function is included. Also, some of the functions may be realized by the OS instead of the application program.

  In addition to the above-described flexible disk, CD, DVD, magnetic disk, optical disk, and magneto-optical disk, the recording medium according to this embodiment includes an IC card, ROM cartridge, magnetic tape, punch card, and internal storage device of a computer ( It is also possible to use various computer-readable media such as a memory such as a RAM or a ROM, an external storage device, or a printed matter on which a code such as a barcode is printed.

[3] Appendix (Appendix 1)
In addition to having a communication device for wireless communication,
A plurality of transmitters for transmitting position detection radio waves for causing the communication device to detect the position of the communication device;
The communication device is
When each of the position detection radio waves transmitted from the plurality of transmitters is received, a detection unit that detects the position of the communication device based on the received plurality of position detection radio waves,
A wireless communication system comprising: a processing unit that operates in a predetermined operation mode according to a management area based on the position of the communication device detected by the detection unit.

(Appendix 2)
Each of the plurality of transmitters is configured to transmit a radio wave indicating the position of the transmitter and a radio wave indicating a transmission time of the position detection radio wave as the position detection radio wave,
The detection unit of the communication device is configured to receive the position detection radio wave based on the position of the position detection radio wave based on the position and the transmission time from the transmitter until the communication device receives the position detection radio wave. The wireless communication system according to appendix 1, wherein a position of the communication device is detected based on a propagation time.

(Appendix 3)
A further reference clock
The wireless communication system according to appendix 2, wherein each of the plurality of transmitters determines the transmission time based on the reference clock.
(Appendix 4)
A further reference clock
Comprising three or more transmitters, each of the three or more transmitters being configured to determine the transmission time based on the reference clock;
The communication device has a dedicated clock for calculating the propagation time,
The wireless communication system according to appendix 2, wherein the detection unit of the communication device detects a position of the communication device based on an error in time between the reference clock and the dedicated clock.

(Appendix 5)
A further reference clock
Comprising four or more transmitters, each of the four or more transmitters being configured to determine the transmission time based on the reference clock;
The communication device has a dedicated clock for calculating the propagation time,
The wireless communication system according to appendix 2, wherein the detection unit of the communication device detects a position of the communication device based on an error in time between the reference clock and the dedicated clock.

(Appendix 6)
A transmission control unit for controlling transmission of the position detection radio waves by the plurality of transmitters;
The transmission control unit is configured to transmit the transmission time determined based on the reference clock and the transmission request signal of the position detection radio wave to each of the plurality of transmitters;
Each of the plurality of transmitters transmits the position detection radio wave when receiving the transmission request signal from the transmission control unit, according to any one of appendix 3 to appendix 5, Wireless communication system.

(Appendix 7)
The appendix 6 is characterized in that the lengths of the signal lines for transmitting the transmission request signal connecting each of the plurality of transmitters and the transmission control unit are the same. Wireless communication system.
(Appendix 8)
The plurality of transmitters are configured to transmit radio waves indicating a specific area in the management area as the position detection radio waves,
The processing unit of the communication device determines whether the position of the communication device detected by the detection unit is within the specific region, and the predetermined unit according to a determination result by the determination unit The wireless communication system according to any one of appendix 1 to appendix 7, wherein the radio communication system includes an operation mode determination unit that determines the operation mode.

(Appendix 9)
When the operation mode determination unit of the processing unit of the communication device determines that the operation mode is within the specific area by the determination unit, the operation mode that restricts a wireless communication function is determined as the predetermined operation mode. The wireless communication system according to appendix 8, wherein
(Appendix 10)
Any one of appendix 1 to appendix 9, wherein each of the plurality of transmitters is configured to transmit a radio wave indicating information for specifying the management area as the position detection radio wave. The wireless communication system according to item 1.

(Appendix 11)
A structure characterized in that the wireless communication system according to any one of Supplementary Note 1 to Supplementary Note 10 is applied, and the management region is provided with the plurality of transmitters.
(Appendix 12)
A transmission procedure for transmitting a position detection radio wave from each of a plurality of transmitters to cause a communication device capable of wireless communication to detect the position of the communication device;
When the communication device receives the position detection radio waves transmitted from the plurality of transmitters, based on the received plurality of position detection radio waves, a detection procedure for detecting the position of the communication device;
A wireless communication method comprising: an operation procedure that operates in a predetermined operation mode according to a management area based on the position of the communication device detected in the detection procedure.

(Appendix 13)
The transmission procedure is configured to transmit a radio wave indicating a specific area in the management area as the position detection radio wave,
The operation procedure includes a determination procedure for determining whether the position of the communication device detected in the detection procedure is within the specific area, and the predetermined operation mode according to a determination result in the determination procedure. 13. The wireless communication method according to appendix 12, characterized by including an operation mode determination procedure for determination.

(Appendix 14)
Connected to a plurality of transmitters for transmitting a position detection radio wave for causing the communication device to detect the position of the communication device;
The transmission control device, wherein the plurality of transmitters are controlled to transmit a radio wave indicating a specific area in which the communication device performs a predetermined operation as the position detection radio wave.

(Appendix 15)
A communication device capable of receiving a position detection radio wave transmitted from each of a plurality of transmitters provided in a management area in which operation of the communication device is to be managed,
When each of the position detection radio waves transmitted from the plurality of transmitters is received, a detection unit that detects the position of the communication device based on the received plurality of position detection radio waves,
A communication device comprising a processing unit that operates in a predetermined operation mode according to the position of the communication device detected by the detection unit.

(Appendix 16)
Each of the plurality of transmitters is configured to transmit a radio wave indicating the position of the transmitter and a radio wave indicating a transmission time of the position detection radio wave as the position detection radio wave,
A calculation unit that calculates a propagation time from when the position detection radio wave is transmitted from the transmitter to when the position detection radio wave is received based on a transmission time of the position detection radio wave indicated by the position detection radio wave; In addition,
The detection unit detects the position of the communication device based on the propagation time calculated by the calculation unit and the position of the transmitter indicated by the position detection radio wave. The communication device described.

(Appendix 17)
The calculation unit has a dedicated clock for calculating the propagation time,
The detection unit detects the position of the communication device based on an error in time between a reference clock for determining a transmission time of the position detection radio wave indicated by the position detection radio wave and the dedicated clock. The communication device according to supplementary note 16, wherein the communication device is characterized.

(Appendix 18)
The processing unit is
A determination unit that determines whether or not a position of the communication device detected by the detection unit is within a specific region indicated by the position detection radio wave;
18. The communication device according to any one of appendix 15 to appendix 17, wherein the communication device is configured to include an operation mode determination unit that determines the predetermined operation mode according to a determination result by the determination unit. .

(Appendix 19)
The plurality of transmitters are configured to transmit radio waves indicating a specific area in the management area as the position detection radio waves,
The processing unit determines whether the position of the communication device detected by the detection unit is within the specific area, and determines the predetermined operation mode according to a determination result by the determination unit. The communication apparatus according to any one of Supplementary Note 15 to Supplementary Note 17, wherein the communication device is configured to include an operation mode determination unit to be determined.

(Appendix 20)
In a communication device capable of receiving position detection radio waves transmitted from each of a plurality of transmitters provided in a management area where the operation of the communication device is to be managed, the position of the communication device (hereinafter referred to as the position of the communication device) A computer-readable recording medium recording an operation control program for causing the communication device to realize a function that operates in a predetermined operation mode according to
The operation control program is
When receiving each of the position detection radio waves transmitted from the plurality of transmitters, based on the received plurality of position detection radio waves, a detection unit that detects the position of the communication device, and
A computer-readable recording medium having an operation control program recorded thereon, wherein the communication device functions as a processing unit that operates in a predetermined operation mode according to the position of the communication device detected by the detection unit. .

It is a figure for demonstrating the structure of the radio | wireless communications system as one Embodiment of this invention. It is a figure for demonstrating the data structure example of the radio wave for position detection transmitted by each of the some transmission apparatus of the radio | wireless communications system as one Embodiment of this invention. It is a block diagram which shows the some transmission apparatus and transmission control apparatus of the radio | wireless communications system as one Embodiment of this invention. It is a figure for demonstrating the operation example of the some transmission apparatus and transmission control apparatus of the radio | wireless communications system as one Embodiment of this invention. It is a block diagram which shows the principal part structure of the communication apparatus of the radio | wireless communications system as one Embodiment of this invention. It is a flowchart for demonstrating the operation | movement procedure of the detection part of a communication apparatus of the radio | wireless communications system as one Embodiment of this invention, and a process part. It is a figure for demonstrating the structure of the radio | wireless communications system as a 1st modification of this invention. It is a figure for demonstrating the structure of the radio | wireless communications system as a 2nd modification of this invention. It is a figure for demonstrating the structure of the radio | wireless communications system as a 3rd modification of this invention.

Explanation of symbols

1, 1a to 1c Wireless communication system 2 Train vehicle (structure)
10, 10-1 to 10-4 Transmitting device (transmitter)
11 Transmission control device (transmission control unit)
12 Basic clock 13-1 to 13-4 Signal line 20, 20a to 20c Mobile phone (communication device)
21 receiver 22 transmitter 23, 23a-23c detector 24 propagation speed calculator (calculator)
25 dedicated clock 26 processing unit 27 determination unit 28 operation mode determination unit 29 switching unit R, Ra use restriction area (specific area)
R1, R2, Ra1, Ra2 vertex

Claims (5)

In addition to having a communication device for wireless communication,
A plurality of transmitters for transmitting position detection radio waves for causing the communication device to detect the position of the communication device;
The communication device is
When each of the position detection radio waves transmitted from the plurality of transmitters is received, a detection unit that detects the position of the communication device based on the received plurality of position detection radio waves,
A wireless communication system comprising: a processing unit that operates in a predetermined operation mode according to a management area based on the position of the communication device detected by the detection unit. The plurality of transmitters are configured to transmit radio waves indicating a specific area in the management area as the position detection radio waves,
The processing unit of the communication device determines whether the position of the communication device detected by the detection unit is within the specific region, and the predetermined unit according to a determination result by the determination unit The wireless communication system according to claim 1, further comprising an operation mode determination unit that determines the operation mode of the wireless communication system. A transmission procedure for transmitting a position detection radio wave from each of a plurality of transmitters to cause a communication device capable of wireless communication to detect the position of the communication device;
When the communication device receives the position detection radio waves transmitted from the plurality of transmitters, based on the received plurality of position detection radio waves, a detection procedure for detecting the position of the communication device;
A wireless communication method comprising: an operation procedure that operates in a predetermined operation mode according to a management area based on the position of the communication device detected in the detection procedure. Connected to a plurality of transmitters for transmitting a position detection radio wave for causing the communication device to detect the position of the communication device;
The transmission control device, wherein the plurality of transmitters are controlled to transmit a radio wave indicating a specific area in which the communication device performs a predetermined operation as the position detection radio wave. A communication device capable of receiving a position detection radio wave transmitted from each of a plurality of transmitters provided in a management area in which operation of the communication device is to be managed,
When each of the position detection radio waves transmitted from the plurality of transmitters is received, a detection unit that detects the position of the communication device based on the received plurality of position detection radio waves,
A communication device comprising a processing unit that operates in a predetermined operation mode according to the position of the communication device detected by the detection unit.

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