JP2007148522A - Radio communication terminal device, and movement detection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal device, in which a mobile object such as an intruder can be detected without using any separate sensor, and a movement detection method. <P>SOLUTION: This device comprises an antenna 3 receiving a radio signal transmitted from a radio station 2, a receiving level measurement part 5 measuring the signal level of the radio signal received by the antenna 3, a sampling part 61 sampling the signal level measured by the measurement part 5, a storage part 62 storing a plurality of the signal levels sampled by the sampling part, a fluctuation calculation part 63 calculating the difference between a maximum value and a minimum value of the plurality of signals stored by the storage part 62 as fluctuation; and a movement detection part 64 detecting the movement of an object around an own device when the fluctuation calculated by the calculation part 63 exceeds a preset threshold. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio communication terminal apparatus that receives a radio signal transmitted from a radio station, and a movement detection method used in such a radio communication terminal apparatus.

2. Description of the Related Art Conventionally, there has been known a security system in which when an abnormality such as intrusion into a house or theft occurs, the occurrence of such an abnormality is reported by wireless communication. In such a security system, for example, a human sensor using infrared rays is installed indoors to detect an intruder, and when an intruder is detected, a wireless communication terminal device is used to notify the security company or user by wireless communication. What is notified is known (for example, refer patent document 1). There is also a need to detect moving objects such as people and animals as well as intruders.
JP 2005-294990 A

  By the way, since the wireless communication terminal device itself used in the security system as described above cannot detect an intruder or the like, it is necessary to use a sensor such as an infrared sensor or a human sensor separately from the wireless communication terminal device. There was a disadvantage that the cost increased.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a wireless communication terminal device that can detect a moving object such as an intruder without using a separate sensor. And it aims at providing the movement detection method utilized for such a radio | wireless communication terminal device.

  To achieve the above object, a wireless communication terminal apparatus according to the first means of the present invention includes a receiving unit that receives a radio signal transmitted from a radio station, and a signal of the radio signal received by the receiving unit. A reception level measurement unit for measuring a level, a fluctuation amount detection unit for detecting a fluctuation amount of a signal level measured by the reception level measurement unit, and a fluctuation amount detected by the fluctuation amount detection unit are set in advance. And a movement detection unit that detects the movement of the object around the own device when the threshold is exceeded.

  Further, in the above-described wireless communication terminal device, the fluctuation amount detection unit includes a sampling unit that samples a signal level measured by the reception level measurement unit at a preset sampling cycle, and a signal sampled by the sampling unit. A storage unit that stores a plurality of levels, and a fluctuation amount calculation unit that calculates a difference between a maximum value and a minimum value at a plurality of signal levels stored by the storage unit as the fluctuation amount are provided.

  The wireless communication terminal apparatus further includes a smoothing unit that smoothes the signal level measured by the reception level measurement unit, and the fluctuation amount detection unit calculates the fluctuation amount of the signal level smoothed by the smoothing unit. The movement detection unit detects the movement of the own device when the fluctuation amount detected by the fluctuation amount detection unit exceeds a preset threshold value.

  Further, in the above-described wireless communication terminal device, the fluctuation amount detection unit includes a sampling unit that samples a signal level smoothed by the smoothing unit at a preset sampling cycle, and a signal level sampled by the sampling unit. A storage unit for storing, and a fluctuation amount calculation unit that calculates a difference between the signal level stored in the storage unit at the previous sampling timing and the signal level newly sampled by the sampling unit as the fluctuation amount. It is characterized by.

  In the above wireless communication terminal device, when the movement is detected by the transmission unit that transmits a radio signal to the wireless station and the movement detection unit, the transmission unit transmits a radio signal indicating the detection of the movement It is further characterized by further comprising a movement notification unit.

  In the wireless communication terminal device described above, a fading pitch detection unit that detects a fading pitch from a signal level measured by the reception level measurement unit after the movement is detected by the movement detection unit, and the fading pitch detection A moving speed acquisition unit that acquires the moving speed from the fading pitch detected by the unit.

  And the movement detection method according to the second means of the present invention comprises a step of receiving a radio signal transmitted from a radio station, a step of measuring a signal level of the received radio signal, and the measured signal. The method includes a step of detecting a level fluctuation amount, and a step of detecting movement of an object around the own apparatus when the detected fluctuation amount exceeds a preset threshold value.

  According to the wireless communication terminal apparatus and the movement detection method configured as described above, a wireless signal transmitted from a wireless station is received, a signal level of the received wireless signal is measured, and a variation amount of the measured signal level is determined. When the detected fluctuation amount exceeds the preset threshold, the movement of the object around the aircraft is detected, so that it is possible to detect a moving object such as an intruder without using a separate sensor. .

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

(First embodiment)
FIG. 1 is a block diagram showing an example of a configuration of a wireless communication terminal device using the movement detection method according to the first embodiment of the present invention. A wireless communication terminal device 1 illustrated in FIG. 1 is fixedly installed indoors, for example, and includes an antenna 3 (reception unit, transmission unit), a radio circuit unit 4, a reception level measurement unit 5, a movement detection control unit 6, a notification A destination storage unit 7 and a communication control unit 8 (movement notification unit) are provided. The antenna 3 receives a radio signal transmitted from the radio station 2 whose position is fixed. The radio circuit unit 4 demodulates the radio signal received by the antenna 3 and outputs the demodulated signal to the communication control unit 8, or modulates the signal output from the communication control unit 8 and transmits the signal from the antenna 3 as a radio signal. . A radio signal received by the antenna 3 is output from the radio circuit unit 4 to the reception level measurement unit 5. The reception level measurement unit 5 measures the signal level of the radio signal received by the antenna 3 and outputs a signal indicating the signal level to the movement detection control unit 6.

  The movement detection control unit 6 temporarily stores, for example, a CPU (Central Processing Unit) that executes predetermined arithmetic processing, a ROM (Read Only Memory) in which a predetermined control program is stored, and data that will be described later. A RAM (Random Access Memory) used as a storage unit 62 for storing a plurality of signal levels sampled by the sampling unit 61 and peripheral circuits thereof, etc., and a control program stored in the ROM is executed. By doing so, it functions as the sampling unit 61, the fluctuation amount calculation unit 63, the movement detection unit 64, the fading pitch detection unit 65, and the movement speed acquisition unit 66.

  The sampling unit 61 samples the signal level measured by the reception level measuring unit 5 for each sampling period T based on the sampling period T set by the communication control unit 8 and the number of samplings n, for example, and the sampling value Are stored in the storage unit 62 n times.

  The fluctuation amount calculation unit 63 calculates the difference between the maximum value and the minimum value of the n signal levels stored in the storage unit 62 as the fluctuation amount D. The movement detection unit 64 moves the object around the wireless communication terminal device 1 when the fluctuation amount D detected by the fluctuation amount calculation unit 63 exceeds a threshold ΔLv set in advance by the communication control unit 8, for example, An intruder intrusion is detected and a detection signal is output to the communication control unit 8.

  In this case, the sampling unit 61, the storage unit 62, and the fluctuation amount calculation unit 63 constitute an example of the fluctuation amount detection unit.

  The fading pitch detection unit 65 detects the fading pitch from the signal level measured by the reception level measurement unit 5 after the movement detection unit 64 detects the movement of the object. Specifically, for example, the fading pitch detection unit 65 changes the signal level measured by the reception level measurement unit 5 using a bandpass filter that passes a fluctuation frequency of a signal level due to fading, for example, a frequency of about 1 Hz to 100 Hz. The frequency component resulting from fading is taken out as fading frequency f, and the fading pitch f is detected by measuring the fading frequency f, that is, the reciprocal of the fading pitch.

  The moving speed acquisition unit 66 acquires the moving speed of the object from the fading frequency f (reciprocal of the fading pitch) detected by the fading pitch detection unit 65 and outputs the moving speed to the communication control unit 8. Specifically, for example, a LUT (Look Up Table) in which the relationship between the fading frequency f and the moving speed is associated in advance is stored in the ROM, and the moving speed acquisition unit 66 refers to the LUT so that the fading is performed. The moving speed of the object is acquired from the fading frequency f detected by the pitch detector 65.

  The notification destination storage unit 7 is configured using, for example, an EEPROM (Electrically Erasable and Programmable Read Only Memory) which is a rewritable nonvolatile memory, and the movement detection unit 64 detects movement of an object, for example, intruder intrusion. In such a case, the communication address of the transmission destination to be notified by wireless communication is stored in advance. In this case, if the wireless communication terminal device 1 is a mobile phone terminal device, the report destination storage unit 7 may store a destination telephone number in advance.

  The communication control unit 8 includes, for example, a CPU that executes predetermined arithmetic processing, a ROM that stores a predetermined control program, a RAM that temporarily stores data, and peripheral circuits thereof. By executing a control program stored in the ROM, the data demodulated by the radio circuit unit 4 is processed, or movement detection control is performed based on preset values, data demodulated by the radio circuit unit 4 and the like. A sampling period T, a sampling count n, and a threshold ΔLv are set in the unit 6, a signal indicating that the movement of the object is detected according to the detection signal output from the movement detection unit 64, and the movement speed acquisition unit 66 The output signal indicating the moving speed of the object is output to the radio circuit unit 4 and modulated, and transmitted from the antenna 3 to the radio station 2 as a radio signal.

  Next, the operation of the wireless communication terminal device 1 configured as described above will be described. FIG. 2 is a flowchart showing an example of the operation of the wireless communication terminal device 1 shown in FIG. First, the communication control unit 8 sets the sampling period T, the number of times of sampling n, and the threshold value ΔLv in the movement detection control unit 6 (step S1).

  The communication control unit 8 may set the sampling period T, the number of times of sampling n, and the threshold value ΔLv based on the data received by the antenna 3 and demodulated by the wireless circuit unit 4, for example, and stored in advance in the ROM. The set values may be used as the sampling period T, the number of samplings n, and the threshold ΔLv.

  The sampling period T may be set as appropriate according to the moving speed of the moving object to be detected, for example, the moving speed of the intruder, and the wireless communication terminal device 1 may be a PDC (Personal Digital Cellular) mobile phone. In the case of a telephone terminal, for example, 720 msec, which is a radio signal reception cycle of a mobile phone terminal in the PDC method, may be set as the sampling cycle T. The sampling number n and the threshold value ΔLv may be set as appropriate according to the required detection accuracy of the moving object. The sampling number n may be about 5 to 10 times, for example, and the threshold value ΔLv may be about 20 dB, for example. .

  Next, the radio signal transmitted from the radio station 2 is received by the antenna 3, amplified by the radio circuit unit 4, and then output to the reception level measurement unit 5, and the signal level of the radio signal is received by the reception level measurement unit 5. Are measured, and the measured signal level is sampled at the sampling period T by the sampling unit 61, and the sampled values are stored n times in the storage unit 62 (step S2).

  Next, the fluctuation amount calculation unit 63 extracts the maximum value and the minimum value of the n signal levels stored in the storage unit 62, and the difference between the maximum value and the minimum value is calculated as the fluctuation amount D ( Step S3).

  Next, the movement detection unit 64 compares the fluctuation amount D detected by the fluctuation amount calculation unit 63 with the threshold value ΔLv (step S4), and if the fluctuation amount D does not satisfy the threshold value ΔLv (in step S4). NO) When it is determined that there is no moving object (step S5), the process proceeds to step S2 again. On the other hand, if the fluctuation amount D is equal to or larger than the threshold ΔLv (YES in step S4), the moving object is around the wireless communication terminal device 1. For example, it is determined that there is an intruder (step S6), and the process proceeds to step S7 to calculate the moving speed.

  FIG. 3A shows that the wireless signal transmitted from the wireless station 2 when the wireless communication terminal device 1 and the wireless station 2 do not move and there is no moving object around the wireless communication terminal device 1 is a wireless communication terminal. 3 is a graph showing an example of a signal level when received by the apparatus 1, that is, a signal level measured by a reception level measuring unit 5. As shown in FIG. 3A, when the wireless communication terminal device 1 and the wireless station 2 do not move and there is no moving object around the wireless communication terminal device 1, reception received by the wireless communication terminal device 1 The level hardly fluctuates.

  On the other hand, FIG. 3B shows a case where a moving object such as an intruder or a car passes around the wireless communication terminal device 1 or the wireless communication terminal device 1 is stolen. 6 is a graph showing an example of a signal level when a radio signal transmitted from the radio station 2 is received by the radio communication terminal device 1 when moving, that is, a reception level measured by the reception level measuring unit 5. As shown in FIG. 3B, when there is a moving object around the wireless communication terminal device 1 or when the wireless communication terminal device 1 is moving, the reception level fluctuates due to fading.

  Then, the processing in steps S2 and S3 determines whether or not there is a change in reception level due to fading based on the difference between the maximum value and the minimum value in the sampling values for n times. It is possible to improve the certainty of detecting the fluctuation of the reception level due to fading caused by the movement of the wireless communication terminal device 1.

  Further, it is known that the fluctuation of the reception level due to fading has periodicity. In FIG. 3B, the interval between the valleys in the fluctuation of the reception level due to fading is the fading pitch L, and the reciprocal of the fading pitch L is Assuming that the fading frequency f is present, it is known that the fading frequency f and the moving speed of the moving object or the wireless communication terminal device 1 have a correlation.

  Thus, in order to calculate the moving speed of the moving object (or the wireless communication terminal device 1) based on the fading frequency f, fading based on the signal level measured by the reception level measuring unit 5 by the fading pitch detecting unit 65 in step S7. The pitch L is measured, the reciprocal thereof is calculated, the fading frequency f is measured, and output to the moving speed acquisition unit 66 (step S7).

  Next, the moving speed acquisition unit 66 calculates the moving speed of the moving object (or the wireless communication terminal device 1) from the fading frequency f acquired by the fading pitch detection unit 65. FIG. 4 is an explanatory diagram in a tabular format showing an example of a correspondence relationship between the fading frequency f and the moving speed of the moving object (or the wireless communication terminal device 1). As shown in FIG. 4, when the fading frequency f is fp or less, the moving speed is 20 km / h or less, when the fading frequency f is fp to 2 fp, the moving speed is 20 km / h to 40 km / h, and the fading frequency f is 2 fp to 3 fp. If there is, the moving speed is 40 km / h to 60 km / h, if the fading frequency f is 3 fp to 4 fp, the moving speed is 60 km / h to 80 km / h, and if the fading frequency f is 4 fp or more, the moving speed is 80 km / h or more. A proportional relationship is established between the frequency f and the moving speed. For example, if the fading frequency f is 40 Hz, the moving speed is 50 km / h, and if the fading frequency f is 80 Hz, the moving speed is 100 km / h.

  Therefore, in step S8, the moving speed acquisition unit 66 refers to, for example, the LUT indicating the correspondence relationship between the fading frequency f and the moving speed of the moving object (or the wireless communication terminal device 1) as described above, and the fading pitch detecting unit. The moving speed of the moving object (or the wireless communication terminal device 1) is calculated from the fading frequency f acquired in 65.

  Next, the communication control unit 8 reads out the communication address (or telephone number) of the report destination from the report destination storage unit 7, designates the communication address (or telephone number) as the destination, and the wireless communication terminal device 1. The information indicating the movement speed calculated by the movement speed acquisition unit 66 and the fact that the movement of the object (or movement of the wireless communication terminal device 1) in the vicinity of the wireless communication terminal device 1 has been detected are output to the wireless circuit unit 4. And is transmitted as a radio signal from the antenna 3 (step S9).

  Thereafter, returning to step S2 again and repeating the processing of steps S2 to S9, the presence or absence of a moving object (for example, an intruder) around the wireless communication terminal apparatus 1 and the moving speed of the object (or wireless communication terminal apparatus 1) Can be continuously notified to the report destination stored in the report destination storage unit 7.

  Note that the report destination may be the radio station 2, or another radio communication terminal device 1, a telephone, or the like may be designated as the report destination by being relayed by the radio station 2. For example, when the wireless communication terminal device 1 is used for crime prevention purposes, there is an intruder around the wireless communication terminal device 1 in the security company by setting the report destination to a telephone number of a security company call center or the like. For example, if the wireless communication terminal device 1 is attached to a fixture that is subject to anti-theft, the movement speed is higher than a predetermined speed set in advance in the security company, for example, the walking speed of a person. If the wireless communication terminal device 1 is stolen, it can be determined that the wireless communication terminal device 1 has been stolen and taken away by some kind of transportation.

  Also, for example, if the report destination is set to the user's phone number, the user can know the presence of an intruder and the occurrence of theft without requesting the security company, so there is no need for outsourcing to the security company. , Can reduce expenses.

  As described above, by the processing in steps S1 to S9, the wireless communication terminal device 1 uses the wireless signal received from the wireless station 2 to perform wireless communication, so that a moving object (for example, an intruder) around the wireless communication terminal device 1 is used. Therefore, it is possible to detect a moving object such as an intruder without using a separate sensor such as an infrared sensor in addition to the wireless communication terminal device 1.

  In addition, for example, for preventing theft, a position detection device such as a GPS (Global Positioning System) is attached to an object to be prevented from being stolen, and the position information of the object is used as a security company or a user using a wireless communication terminal device. It is conceivable to detect the movement of the object, i.e., theft by notifying the report destination, but according to the wireless communication terminal device 1 shown in FIG. Without using the position detection device, the notification destination can be notified of the movement speed of the wireless communication terminal device 1, and the notification destination can know the occurrence of theft from the movement speed.

  Note that the communication control unit 8 is not limited to an example in which information indicating the movement speed itself calculated by the movement speed acquisition unit 66 is transmitted as a radio signal by the wireless circuit unit 4 and the antenna 3, and is calculated by the movement speed acquisition unit 66. For example, when the moving speed exceeds a preset threshold value, for example, 20 km / h, which is faster than the walking speed of a person, information indicating that the theft has occurred is stored in the report destination storage unit 7 by the radio circuit unit 4 and the antenna 3. You may make it send to a report destination as a radio signal.

(Second Embodiment)
Next, a radio communication terminal apparatus using the movement detection method according to the second embodiment of the present invention will be described. FIG. 5 is a block diagram showing an example of the configuration of the wireless communication terminal device 1a according to the second embodiment of the present invention. The wireless communication terminal device 1a illustrated in FIG. 5 further includes a low-pass filter 9 (smoothing unit) as compared with the wireless communication terminal device 1 illustrated in FIG. 1, and the wireless signal output from the reception level measurement unit 5 by the low-pass filter 9 This is different in that the signal indicating the signal level is smoothed and the fluctuation of the signal level due to the high frequency component, that is, fading is removed, and then output to the sampling unit 61a.

  Except for the difference in the operation of the fluctuation amount calculation unit 63a as described later, the other configuration is the same as that of the wireless communication terminal device 1 shown in FIG. explain. FIG. 6 is a flowchart showing an example of the operation of the wireless communication terminal device 1a shown in FIG. First, the communication control unit 8 sets the sampling period T and the threshold value ΔLv in the movement detection control unit 6 (step S11).

  The communication control unit 8 may set the sampling period T and the threshold value ΔLv based on the data received by the antenna 3 and demodulated by the radio circuit unit 4, for example, and set values stored in advance in the ROM May be used as the sampling period T and the threshold value ΔLv.

  Next, the radio signal transmitted from the radio station 2 is received by the antenna 3, amplified by the radio circuit unit 4, and then output to the reception level measurement unit 5, and the signal level of the radio signal is received by the reception level measurement unit 5. Is measured, a signal indicating the measured signal level is output to the low-pass filter 9, and the signal indicating the signal level of the radio signal output from the reception level measuring unit 5 is smoothed by the low-pass filter 9, and the high-frequency component That is, after the fluctuation of the signal level due to fading is removed, the sampling unit 61a performs sampling at the sampling period T, and the sampling value is stored in the storage unit 62 each time sampling is performed (step S12).

  FIG. 7A is a signal waveform diagram illustrating an example of a signal waveform before the signal indicating the reception signal level output from the reception level measurement unit 5 passes through the low-pass filter 9. FIG. 7B is a signal waveform diagram showing an example of a signal waveform after the signal indicating the reception signal level output from the reception level measurement unit 5 passes through the low-pass filter 9.

  The signal level of the radio signal transmitted from the radio station 2 becomes weaker as the distance between the radio station 2 and the radio communication terminal device 1a increases, and becomes stronger as the distance approaches. Therefore, for example, when the wireless communication terminal device 1a moves in a direction approaching the wireless station 2, the signal level of the received signal received by the antenna 3 and measured by the reception level measuring unit 5 is fading as shown in FIG. The signal level gradually increases in accordance with the movement of the wireless communication terminal device 1a, accompanied by the fluctuation of the signal level due to.

  Here, when the signal indicating the signal level passes through the low-pass filter 9 and is smoothed, as shown in FIG. 7B, fluctuations in the signal level due to fading can be removed, and the radio communication terminal apparatus 1a. Only a signal component representing an increase in signal level accompanying the movement of the signal is input to the sampling unit 61a and sampled at the sampling period T by the sampling unit 61a, and the sampled value is stored in the storage unit 62 every sampling.

  Next, the fluctuation amount calculation unit 63a calculates the difference D between the signal level stored in the storage unit 62 and the signal level newly sampled by the sampling unit 61a at the previous sampling timing as the signal level fluctuation amount D. (Step S13).

  Next, the movement detection unit 64 compares the fluctuation amount D detected by the fluctuation amount calculation unit 63a with the threshold value ΔLv (step S14), and if the fluctuation amount D does not satisfy the threshold value ΔLv (in step S14). NO) Since there is no change in the signal level, it is determined that the wireless communication terminal device 1a has not moved, and therefore, for example, has been stolen and is not being transported (step S15). If the amount D is greater than or equal to the threshold value ΔLv (YES in step S14), it is determined that the wireless communication terminal device 1a is moving, and thus, for example, is stolen and transported (step S16), and the moving speed is further increased. Then, the process proceeds to step S17.

  Hereinafter, steps S17 to S19 are the same as steps S7 to S9 in FIG.

  As described above, the process of steps S11 to S16 can detect the movement of the wireless communication terminal device 1a using the wireless signal received from the wireless station 2 in order for the wireless communication terminal device 1a to perform wireless communication. The movement of the wireless communication terminal device 1a due to theft or the like can be detected without using a separate position detection device such as GPS in addition to the wireless communication terminal device 1a.

  Furthermore, since the movement speed can be detected by the processing of steps S17 to S19, for example, when a fixture or the like to which the wireless communication terminal device 1a is attached is stolen, whether it is transported on foot, You can know if it was transported using transportation, and you can get clues in theft investigation.

It is a block diagram which shows an example of a structure of the radio | wireless communication terminal device which concerns on the 1st Embodiment of this invention. 3 is a flowchart illustrating an example of an operation of the wireless communication terminal device illustrated in FIG. 1. (A) is a signal level when the wireless communication terminal apparatus receives a wireless signal transmitted from the wireless station when the wireless communication terminal apparatus and the wireless station do not move and there is no moving object around the wireless communication terminal apparatus. It is a graph which shows an example. (B) is a graph showing an example of a signal level when a radio signal transmitted from a radio station is received by the radio communication terminal apparatus when there is a moving object around the radio communication terminal apparatus. It is explanatory drawing of a table format which shows an example of the correspondence of a fading frequency and the moving speed of a moving object (or radio | wireless communication terminal device). It is a block diagram which shows an example of a structure of the radio | wireless communication terminal device which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the radio | wireless communication terminal device shown in FIG. (A) is a signal waveform diagram showing an example of a signal waveform before the signal indicating the received signal level output from the received level measuring section passes through the low-pass filter. (B) is a signal waveform diagram showing an example of a signal waveform after the signal indicating the reception signal level output from the reception level measuring section passes through the low-pass filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Wireless communication terminal device 2 Radio station 3 Antenna 4 Radio circuit part 5 Reception level measurement part 6 Movement detection control part 7 Report destination storage part 8 Communication control part 9 Low pass filter 61, 61a Sampling part 62 Storage part 63, 63a Quantity calculation unit 64 Movement detection unit 65 Fading pitch detection unit 66 Movement speed acquisition unit L Fading pitch

Claims (7)

A receiver that receives a radio signal transmitted from the radio station;
A reception level measurement unit for measuring a signal level of a radio signal received by the reception unit;
A fluctuation amount detection unit for detecting a fluctuation amount of the signal level measured by the reception level measurement unit;
A wireless communication terminal apparatus comprising: a movement detection unit that detects movement of an object in the vicinity of the device when the fluctuation amount detected by the fluctuation amount detection unit exceeds a preset threshold value. The fluctuation amount detection unit
A sampling unit that samples the signal level measured by the reception level measuring unit at a preset sampling period;
A storage unit for storing a plurality of signal levels sampled by the sampling unit;
The wireless communication terminal apparatus according to claim 1, further comprising: a fluctuation amount calculation unit that calculates a difference between a maximum value and a minimum value at a plurality of signal levels stored in the storage unit as the fluctuation amount. A smoothing unit for smoothing the signal level measured by the reception level measuring unit;
The fluctuation amount detection unit detects a fluctuation amount of the signal level smoothed by the smoothing unit,
The wireless communication terminal apparatus according to claim 1, wherein the movement detection unit detects a movement of the own device when the fluctuation amount detected by the fluctuation amount detection unit exceeds a preset threshold value. . The fluctuation amount detection unit
A sampling unit that samples the signal level smoothed by the smoothing unit at a preset sampling period;
A storage unit for storing the signal level sampled by the sampling unit;
The apparatus further comprises a fluctuation amount calculation unit that calculates a difference between a signal level stored in the storage unit at a previous sampling timing and a signal level newly sampled by the sampling unit as the fluctuation amount. 3. The wireless communication terminal device according to 3. A transmitter for transmitting a radio signal to the radio station;
5. A movement notification unit that transmits a radio signal indicating the detection of the movement by the transmission unit when the movement is detected by the movement detection unit. 6. Wireless communication terminal device. A fading pitch detection unit that detects a fading pitch from the signal level measured by the reception level measurement unit after the movement is detected by the movement detection unit;
The wireless communication terminal apparatus according to claim 1, further comprising: a moving speed acquisition unit that acquires the moving speed from a fading pitch detected by the fading pitch detection unit. Receiving a radio signal transmitted from a radio station;
Measuring the signal level of the received radio signal;
Detecting a variation in the measured signal level;
And a step of detecting movement of an object around the own apparatus when the detected fluctuation amount exceeds a preset threshold value.

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