JP2007257302A - Pedestrian portable radio communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal capable of making a pedestrian accurately recognize an auditory output. <P>SOLUTION: When a plurality of operations in a predetermined operation order to a predetermined operation member or a predetermined operation continued for a predetermined operation time to the operation member is detected, a voice input control part 22 sets a recordable state by a microphone over a predetermined time and stores an operator's voice input in a storage part 23. An alarm determination part 26 determines whether a pedestrian may contact with a circumferential vehicle or not based on the current position, advancing direction and speed of the pedestrian portable radio communication terminal 10 outputted from a terminal state quantity detection part 21 and the distance to the circumferential vehicle and the speed and advancing direction of the circumferential vehicle detected by a vehicle state quantity detection part 24. An output control part 26 acquires a predetermined voice stored in the storage part 23 and outputs it from an auditory transmission device of an alarm device 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pedestrian portable wireless communication terminal.

Conventionally, for example, information is exchanged between a vehicle and a pedestrian, and a caution or warning for the pedestrian is visually notified by display on a monitor, an audible notification by sound output or synthesized voice output, vibration, etc. There is known a wireless communication system that performs notification by a tactile notification such as (see, for example, Patent Document 1).
JP 2004-220143 A

By the way, according to the wireless communication system according to the above-described prior art, the ambient noise is relatively high, such as a place where the traffic volume is relatively high or a place where the number of people is relatively high, depending on the environment around the pedestrian. If it is too high, it may be difficult for the pedestrian to accurately recognize the auditory notification. In addition, when the auditory output such as the acoustic output or the synthesized voice output has a relatively high versatility, for example, when the auditory output is similar to the auditory output from another device, these are used. It may become even more difficult to alert the pedestrian with the auditory output.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pedestrian portable wireless communication terminal that allows a pedestrian to accurately recognize an auditory output.

  In order to solve the above problems and achieve the object, the pedestrian portable wireless communication terminal according to the present invention communicates directly or indirectly with an in-vehicle wireless communication device mounted on a vehicle. A pedestrian portable wireless communication terminal capable of outputting a warning to a pedestrian in a predetermined situation by performing voice storage means for recording and storing a voice (for example, the storage unit 23 in the embodiment) And voice output means for outputting the voice stored in the voice storage means as the alarm (for example, the output control unit 26 and the alarm device 14 in the embodiment).

  According to the above pedestrian portable wireless communication terminal, since the voice stored in the voice storage means is output as an alarm, the voice that the pedestrian easily reacts habitually, for example, the naming of the name by a close relative, etc. is stored. Thus, the pedestrian's attention can be accurately called.

  Furthermore, in the pedestrian portable wireless communication terminal according to the second aspect of the present invention, the predetermined situation is a situation in which a vehicle and the pedestrian may come into contact, and the alarm is the situation. It is characterized in that it is at least one of transmission and transmission of a method for avoiding the situation.

  According to the pedestrian portable wireless communication terminal described above, it is possible to appropriately avoid contact between the vehicle and the pedestrian by outputting an alarm in a situation where the vehicle and the pedestrian may come into contact with each other.

  Furthermore, the pedestrian portable wireless communication terminal according to the third aspect of the present invention includes a predetermined number of operation members, and the voice storage means includes at least one of a predetermined operation order of the operation members and a predetermined operation time. It is characterized by being able to record by this operation.

  According to the above pedestrian portable wireless communication terminal, when a plurality of operations in a predetermined operation order on the operation member or a predetermined operation continued for a predetermined operation time on the operation member is detected. By making recording possible, it is possible to prevent the recording state from occurring in a state contrary to the operator's will of operation or in a state not intended by the operator.

  Furthermore, in the pedestrian portable wireless communication terminal according to the present invention as set forth in claim 4, the voice storage means can record the voice within a predetermined time.

  According to the above pedestrian portable wireless communication terminal, it is possible to prevent the output voice from becoming excessively long and to output an appropriate alarm in an emergency or the like.

  Furthermore, in the pedestrian portable wireless communication terminal according to the fifth aspect of the present invention, the predetermined situation is a situation where there is a risk of contact between the vehicle and the pedestrian.

  According to the wireless communication terminal for portable pedestrians described above, by outputting the voice stored by the voice storage means to the pedestrian in a situation where there is a risk of contact between the vehicle and the pedestrian, Contact with a pedestrian can be prevented in advance.

  Furthermore, the wireless communication terminal for portable pedestrians according to the present invention described in claim 6 includes estimation means (for example, the alarm determination unit 25 in the embodiment) for estimating the degree of risk of the contact, and the voice The output means changes the sound output as the alarm according to the degree of the danger.

  According to the wireless communication terminal for portable pedestrians described above, by changing the sound output as an alarm according to the degree of danger of contact between the vehicle and the pedestrian, there is a risk of danger to the pedestrian. Appropriate degree can be recognized.

  Furthermore, in the pedestrian portable wireless communication terminal according to the present invention as set forth in claim 7, the estimation means determines the degree of risk of contact relative to the vehicle and the pedestrian obtained by reception of communication radio waves. Is estimated based on the distance and the radio wave intensity of the communication radio wave, and according to the change of the radio wave intensity accompanying the approach of the relative distance, at least the vehicle passes the side of the pedestrian, or It is characterized by determining whether or not the pedestrian is facing directly.

  According to the above pedestrian portable wireless communication terminal, there is a risk of contact between the vehicle and the pedestrian based on the relative distance between the vehicle and the pedestrian obtained by receiving the communication radio wave and the radio wave intensity of the communication radio wave. The estimation accuracy can be improved by estimating the degree. And, in addition to determining whether the vehicle is facing the pedestrian in accordance with the change in the radio field intensity accompanying the approach of the relative distance, determining whether the vehicle passes the side of the pedestrian Therefore, even if a vehicle passes through the side of a pedestrian that is present on a sidewalk, etc., the pedestrian may be in a dangerous situation by appropriately calling attention to the pedestrian. Can be prevented.

  Furthermore, in the pedestrian portable wireless communication terminal according to the present invention as set forth in claim 8, when the change of the radio field intensity is relatively small with respect to the change of the relative distance, the estimation means It is determined that the vehicle passes the side of the pedestrian, and the vehicle is determined to approach the pedestrian when the radio wave intensity decreases relatively rapidly as the relative distance increases. Yes.

  According to said pedestrian portable wireless communication terminal, it is possible to appropriately discriminate between the case where the vehicle passes by the side of the pedestrian and the case where the vehicle approaches the pedestrian.

As described above, according to the wireless communication terminal for portable pedestrians of the present invention, it is possible to accurately attract the pedestrian's attention by storing the voice that the pedestrian easily reacts habitually. .
Furthermore, according to the wireless communication terminal for portable pedestrians of the present invention described in claim 2, the vehicle and the pedestrian can be contacted by outputting an alarm in a situation where the vehicle and the pedestrian may contact. It can be avoided appropriately.
Furthermore, according to the pedestrian portable wireless communication terminal of the present invention as set forth in claim 3, the recording state is caused contrary to the operator's will of operation or in a state not intended by the operator. Can be prevented.
Furthermore, according to the pedestrian portable wireless communication terminal of the present invention as set forth in claim 4, it is possible to prevent the output sound from becoming excessively long and to output an appropriate alarm in an emergency or the like. .

Furthermore, according to the pedestrian portable wireless communication terminal of the present invention described in claim 5, the voice stored in the voice storage means is stored for the pedestrian in a situation where there is a risk of contact between the vehicle and the pedestrian. By outputting as an alarm, contact between the vehicle and the pedestrian can be prevented in advance.
Furthermore, according to the pedestrian portable wireless communication terminal of the present invention as set forth in claim 6, walking is performed by changing the sound output as an alarm according to the degree of danger of contact between the vehicle and the pedestrian. It is possible to make a person appropriately recognize the degree of danger in a dangerous situation.

Furthermore, according to the pedestrian portable wireless communication terminal of the present invention described in claim 7, even if the vehicle passes through the side of the pedestrian existing on the sidewalk or the like, Proper attention can prevent a pedestrian from falling into a dangerous situation.
Furthermore, according to the pedestrian portable wireless communication terminal of the present invention described in claim 8, when the vehicle passes by the side of the pedestrian and when the vehicle approaches the pedestrian directly Can be determined.

Hereinafter, a pedestrian portable wireless communication terminal according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The pedestrian portable wireless communication terminal 10 according to the present embodiment includes a positioning signal receiving device 11, a microphone 12, a communication device 13, an alarm device 14, and a processing device 15, as shown in FIG. Configured.

The positioning signal receiving device 11 receives a positioning signal such as a GPS (Global Positioning System) signal for measuring the current position using an artificial satellite, for example.
The microphone 12 outputs a voice input signal by the operator to the processing device 15.
The communication device 13 receives various types of information transmitted from an external information transmission device, for example, information related to the traveling state and traveling path of the host vehicle transmitted from surrounding vehicles.

The alarm device 14 includes, for example, a tactile transmission device, a visual transmission device, and an auditory transmission device.
The tactile transmission device is, for example, a vibration device or the like, and generates vibration that can be perceived by a pedestrian in the pedestrian portable wireless communication terminal 1 according to a control signal input from the processing device 15, for example. Encourage pedestrians to call attention.
The visual transmission device includes, for example, a display device (for example, each display screen C1 shown in FIG. 2A and FIG. 3) and the like according to a control signal input from the processing device 15, for example, on the display device. By displaying warning information or blinking a predetermined warning light, pedestrians are alerted.
The auditory transmission device is, for example, a speaker or the like, and urges a pedestrian to be alerted by outputting a predetermined sound in response to a control signal input from the processing device 15.

  The processing device 15 includes, for example, a terminal state quantity detection unit 21, a voice input control unit 22, a storage unit 23, a vehicle state quantity detection unit 24, an alarm determination unit 25, and an output control unit 26. ing.

The terminal state quantity detection unit 21 detects a current position based on a positioning signal such as a GPS (Global Positioning System) signal, and calculates a traveling direction and a speed based on a temporal change of the current position.
Note that the terminal state quantity detection unit 21 uses, for example, a GPS based on an average value of the current position corresponding to each of a plurality of positioning signals such as a GPS signal, or a detection value of a sensor (not shown) such as a geomagnetic sensor or an acceleration sensor. The calculation result of the current position calculated based on a positioning signal such as a signal may be corrected.

  The voice input control unit 22 performs a plurality of operations (for example, a predetermined operation order) on a predetermined operation member (for example, each of the operation buttons d1 to d3 illustrated in FIG. 2B and FIG. 3) including buttons and switches. , A pressing operation in a predetermined order with respect to the plurality of operation buttons d1 to d3 shown in FIG. 3, a simultaneous pressing operation with respect to any two operation buttons among the plurality of operation buttons d1 to d3, or the like. A predetermined operation continued over a predetermined operation time (for example, more than a predetermined time with respect to the operation button d1 arranged so as to be recessed from the side surface of the pedestrian portable wireless communication terminal 10 shown in FIG. 2B) For example, within a predetermined time (for example, 2 to 3 seconds), the microphone 12 is ready for recording, and the voice input of the operator is stored in the storage unit 23.

The vehicle state quantity detection unit 24 detects the distance to the surrounding vehicle, the speed of the surrounding vehicle, and the traveling direction based on, for example, information on the traveling state and traveling path of the vehicle transmitted from the surrounding vehicle.
The alarm determination unit 25 includes the current position and traveling direction and speed of the pedestrian portable wireless communication terminal 10 output from the terminal state quantity detection unit 21, and the distance to surrounding vehicles detected by the vehicle state quantity detection unit 24. Based on the speed of the surrounding vehicle and the traveling direction of the surrounding vehicle, for example, it is determined whether or not there is a possibility of contact with the surrounding vehicle, thereby determining whether the alarm output is necessary.

  The output control unit 26 acquires a predetermined sound stored in the storage unit 23 based on the determination result of necessity of alarm output output from the alarm determination unit 25 and outputs it from the auditory transmission device of the alarm device 14. Let

The output control unit 26 may be set to output the sound stored in the storage unit 23, for example, as an alarm in a relatively high risk state, or stored in the storage unit 23, for example. The sound can be output in combination with an appropriate alarm sound, and only the alarm sound is output when the degree of danger is relatively low, and the sound stored in the storage unit 23 when the degree of danger exceeds a predetermined value. It may be set to output.
Further, the output control unit 26 may change the sound selected as the alarm from the storage unit 23 according to, for example, the degree of danger of contact between the vehicle and the pedestrian, or the time until the occurrence of the collision, for example. In this case, for example, the sound recording time may be set to change in a tendency to be shortened as the time until the occurrence of the collision is shortened.

For example, as shown in Table 1 below, the output control unit 26 may, for example, record a recording time as an alarm to watch out for its own action at a predetermined time (eg, 10 seconds) until the time of the collision is relatively long. Is a relatively long voice (for example, 5 seconds, etc.) and is selected and output such as “I am dangerous when I get on the road” or “Is walking on the sidewalk?”.
In addition, for example, at a predetermined time with a relatively medium time until the collision (for example, 5 seconds), for example, a relatively medium time with a predetermined time (for example, a recording time) 3), etc., which is a voice of 3 seconds) is selected and output.
Further, for example, in a predetermined time (for example, 3 seconds) that is relatively short before the collision, for example, as a warning to notice at least danger, for example, a predetermined time (for example, 2 seconds) for which the recording time is relatively short Select “Danger!” Or “Crash!”, Which are voices, and output them.

  The pedestrian portable radio communication terminal 10 according to the present embodiment has the above-described configuration. Next, the operation of the pedestrian portable radio communication terminal 10 will be described.

  First, for example, in step S01 shown in FIG. 4, a plurality of operations in a predetermined operation order for a predetermined operation member by the operator, or a predetermined operation by the operator that continues for a predetermined operation time with respect to the operation member. When the operation is detected, for example, the recording by the microphone 12 is enabled for a predetermined time (for example, 2 to 3 seconds), and the voice input of the operator is stored.

And in step S02, the information regarding the driving | running | working state and driving | running route of the vehicle transmitted from the surrounding vehicle is acquired.
In step S03, the current position of the pedestrian carrying the pedestrian portable wireless communication terminal 10 is detected based on a positioning signal such as a GPS (Global Positioning System) signal, and the time change of the current position is detected. Based on this, the traveling direction and speed of the pedestrian are calculated.

In step S04, the current position and traveling direction and speed of the pedestrian carrying the pedestrian portable wireless communication terminal 10 and the surrounding vehicle calculated based on the information on the traveling state and traveling path of the surrounding vehicle are also calculated. Alarm output is required by determining whether there is a possibility of contact between the pedestrian and the surrounding vehicle based on the distance of the vehicle, the speed of the surrounding vehicle and the traveling direction of the surrounding vehicle, for example. Determine if it is in a dangerous state.
If this determination is “NO”, the flow returns to step S 02 described above.
On the other hand, if this determination is “YES”, the flow proceeds to step S 05.
In step S05, the predetermined sound stored in the storage unit 23 is acquired and output from the auditory transmission device of the alarm device 14, and the series of processing ends.

  As described above, according to the pedestrian portable wireless communication terminal 10 according to the present embodiment, since the operator's voice stored in the storage unit 23 is output as an alarm, the pedestrian easily reacts habitually. By storing voices, for example, names of relatives by relatives, pedestrians can be accurately alerted in dangerous situations where there is a possibility of contact with a vehicle, for example.

  In the above-described embodiment, the vehicle state quantity detection unit 24 determines the distance to the surrounding vehicle and the speed of the surrounding vehicle based on the information on the traveling state and the traveling path of the own vehicle transmitted from the surrounding vehicle. However, the present invention is not limited to this. For example, a pedestrian detected by an external sensor such as a camera or a radar device mounted on a surrounding vehicle (that is, the pedestrian portable wireless communication terminal 10 is detected). It is determined whether there is a possibility of contact with a surrounding vehicle, for example, based on information relating to a relative amount of state (for example, relative speed, relative position, and relative traveling direction). Thus, the necessity of alarm output may be determined.

  In this case, in the information output from the surrounding vehicles, for example, for identifying the pedestrian portable wireless communication terminal 10 carried by each pedestrian corresponding to each pedestrian detected by the external sensor of the vehicle. Predetermined identification information is added, and each pedestrian portable wireless communication terminal 10 that has acquired this information includes predetermined identification information stored in advance for each pedestrian portable wireless communication terminal 10 and surrounding information. It is determined whether or not the identification information acquired from the vehicle matches, and based on the determination result, it is determined whether or not the self is detected by a surrounding vehicle.

  In the first modified example, first, for example, in step S11 shown in FIG. 5, a plurality of operations performed by the operator on a predetermined operation member in a predetermined operation order or continued over a predetermined operation time with respect to the operation member. When a predetermined operation by the operator to be performed is detected, recording by the microphone 12 is enabled and voice input of the operator is stored.

  In step S12, for example, information relating to the relative state quantities (for example, relative speed, relative position, and relative traveling direction) between the host vehicle and pedestrians transmitted from the surrounding vehicles is stored in each pedestrian. Together with identification information unique to the wireless communication terminal 10 for use.

In step S13, the current position and traveling direction and speed of the pedestrian portable wireless communication terminal 10 output from the terminal state quantity detection unit 21 and the surrounding vehicles detected by the vehicle state quantity detection unit 24 are displayed. Based on the distance, the speed of the surrounding vehicle, and the traveling direction of the surrounding vehicle, it is a dangerous state in which an alarm output is required, for example, by determining whether there is a possibility of contact with the surrounding vehicle. It is determined whether or not.
If this determination is “NO”, the flow returns to step S 12 described above.
On the other hand, if the determination is “YES”, the flow proceeds to step S14.
And in step S14, the predetermined | prescribed audio | voice stored in the memory | storage part 23 is acquired, it is made to output from the auditory transmission apparatus of the alarm device 14, and a series of processes are complete | finished.

Moreover, in the pedestrian portable radio | wireless communication terminal 10 which concerns on the 1st modification of embodiment mentioned above, in the surrounding vehicle, for example, whether there exists a possibility of the contact with the pedestrian detected by the external sensor. This determination result may be transmitted from surrounding vehicles together with identification information unique to each pedestrian portable wireless communication terminal 10.
In this case, the pedestrian portable terminal wireless device 10 that has received the information determined to have a possibility of contact with the surrounding vehicle immediately acquires the predetermined voice stored in the storage unit 23 and issues an alarm. Output from the auditory transmission device of the device 14.

In the above-described embodiment, the vehicle state quantity detection unit 24, for example, based on a temporal change in reception intensity with respect to radio waves transmitted from the surrounding vehicles, the distance to the surrounding vehicles, the speed of the surrounding vehicles, and the surroundings The traveling direction of the vehicle may be detected.
For example, in the second modification shown in FIG. 6 and FIG. 7, a pedestrian carrying the pedestrian portable wireless communication terminal 10 exists on the travel locus RA of the vehicle A in the forward direction of the appropriate vehicle A around. In the case (for example, in the case of the front shown in FIGS. 6 and 7), the reception intensity with respect to the radio wave transmitted from the vehicle A changes abruptly in a region relatively close to the vehicle A. On the other hand, when the pedestrian carrying the pedestrian portable wireless communication terminal 10 is present at a position deviated from the travel locus RA in front of the appropriate traveling direction of the surrounding vehicle A (for example, FIG. 6 and FIG. 7). (In the case of the side (side) shown in FIG. 2), the reception intensity with respect to the radio wave transmitted from the vehicle A changes relatively gently according to the relative distance.

In the second modified example, when the output control unit 26 selects the sound stored in the storage unit 23 according to the strength of the reception strength with respect to the radio wave transmitted from the surrounding vehicle, for example, as shown in Table 2 below. Thus, for example, when the reception strength is relatively weak, as an alarm to watch out for the surroundings, for example, the sound of a predetermined time (for example, 3 seconds) whose recording time is relatively medium (for example, 3 seconds) Select "Be careful" and output.
For example, when the reception strength is relatively high, at least a warning to be aware of danger, for example, “danger!” Or “collision”, which is a sound of a predetermined time (for example, 2 seconds) with a relatively short recording time. ! "Etc. are selected and output.

  Moreover, in this 2nd modification, the output control part 26 is the audio | voice stored in the memory | storage part 23 according to the relative position with the surrounding vehicle in addition to the strength of the reception strength with respect to the electromagnetic wave transmitted from the surrounding vehicle. When, for example, as shown in Table 3 below, for example, when the reception strength is relatively weak, a pedestrian carrying the pedestrian portable wireless communication terminal 10 is in front of the appropriate traveling direction of the surrounding vehicle. When the vehicle is located at a position deviating from the travel locus (side (side)), the alarm is prohibited from being output, and the pedestrian carrying the pedestrian portable radio communication terminal 10 is in a suitable vehicle around. When the vehicle is on the traveling track in front of the traveling direction (in the case of the front), for example, a predetermined time with a relatively medium recording time (for example, 3 seconds) is used as an alarm to watch around. "Watch out for your car" It chooses to output.

  In addition, for example, when the reception strength is relatively strong, the output control unit 26 causes the pedestrian carrying the pedestrian portable wireless communication terminal 10 to deviate from the traveling locus in the forward direction of the appropriate vehicle in the vicinity. When present at the position (in the case of side (side)), for example, a sound of a predetermined time (for example, 3 seconds) with a relatively medium recording time is used as an alarm to watch out for the surroundings. When the pedestrian carrying the pedestrian portable wireless communication terminal 10 is on the traveling locus of the vehicle in the forward direction of the surrounding vehicle (front view) In the case of the case, for example, at least a warning of which a danger is noticed is selected and output, for example, “Danger!” Or “Crash!” Which is a sound of a predetermined time (for example, 2 seconds) whose recording time is relatively short. Let

  According to the second modified example, in addition to determining whether the vehicle approaches the pedestrian in accordance with the change in the radio wave intensity (reception strength) accompanying the approach of the relative distance, the vehicle is a pedestrian. Even if the vehicle passes through the side of a pedestrian existing on a sidewalk, etc., it is possible to walk It is possible to prevent a person from falling into a dangerous situation.

1 is a configuration diagram of a pedestrian portable wireless communication terminal according to an embodiment of the present invention. 2 (a) and 2 (b) are diagrams showing an example of the outer shape of the pedestrian portable wireless communication terminal according to the embodiment of the present invention. It is a figure which shows an example of the external shape of the pedestrian portable radio | wireless communication terminal which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the pedestrian portable radio | wireless communication terminal which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the pedestrian portable radio | wireless communication terminal which concerns on the 1st modification of embodiment of this invention. It is a figure which shows the relative position state of the pedestrian portable radio | wireless communication terminal which concerns on the 2nd modification of embodiment of this invention, and the surrounding vehicle. It is a figure which shows the relationship between the reception strength with respect to the electromagnetic wave transmitted from a surrounding vehicle, and the relative distance between a surrounding vehicle and a pedestrian portable radio | wireless communication terminal.

Explanation of symbols

10 Wireless communication terminal for portable pedestrian 14 Alarm device (voice output means)
23 Storage unit (voice storage means)
25 Warning judgment part (estimation means)
26 Output control unit (voice output means)

Claims (8)

A pedestrian portable wireless communication terminal capable of outputting an alarm to a pedestrian in a predetermined situation by directly or indirectly communicating with an in-vehicle wireless communication device mounted on a vehicle,
Voice storage means for recording and storing voice;
A pedestrian portable wireless communication terminal comprising: voice output means for outputting the voice stored in the voice storage means as the alarm. The predetermined situation is a situation where there is a possibility that the vehicle and the pedestrian are in contact with each other, and the warning is at least one of a sound that conveys the situation or a method for avoiding the situation. The wireless communication terminal for portable pedestrians according to claim 1, wherein A predetermined number of operation members are provided,
The pedestrian portable radio according to claim 1 or 2, wherein the voice storage means can be recorded by an operation of at least one of a predetermined operation order and a predetermined operation time of the operation member. Communication terminal. The pedestrian portable wireless communication terminal according to any one of claims 1 to 3, wherein the voice storage means is capable of recording the voice within a predetermined time. The pedestrian portable wireless communication terminal according to any one of claims 1 to 4, wherein the predetermined situation is a situation where there is a risk of contact between the vehicle and the pedestrian. Comprising estimation means for estimating the degree of risk of contact,
The pedestrian portable wireless communication terminal according to claim 5, wherein the voice output means changes the voice to be output as the alarm according to the degree of the danger. The estimation means estimates the degree of risk of contact based on a relative distance between the vehicle and the pedestrian obtained by receiving a communication radio wave and a radio wave intensity of the communication radio wave. According to a change in the radio field intensity accompanying the approach, it is determined whether at least the vehicle passes by the side of the pedestrian or approaches the pedestrian. The pedestrian portable wireless communication terminal according to claim 5 or 6. The estimation means determines that the vehicle passes a side of the pedestrian when the change in the radio field intensity is relatively small with respect to the change in the relative distance, and the radio wave increases as the relative distance increases. The pedestrian portable wireless communication terminal according to claim 7, wherein when the strength decreases relatively abruptly, it is determined that the vehicle approaches the pedestrian directly.

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