JP2008244532A - Wireless terminal and method for detecting moving speed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid an evil of call termination caused by lapse of memory of mode switching by recognizing high speed movement of a user quickly and surely thereby setting and releasing drive mode or manner mode automatically without bothering the hand of a user. <P>SOLUTION: The wireless terminal 140 comprises a wireless communication section 218 for acquiring an identifier peculiar to a base station 130 in a communicable range, a section 230 for storing an identifier acquired after change if the acquisition object of identifier changed, and a section 232 for comparing the number of different identifiers stored in a predetermined time in the past with a predetermined high speed threshold and detecting the fact that the wireless terminal is moving at high speed when the predetermined high speed threshold is exceeded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless terminal such as a mobile phone, and more particularly to a wireless terminal and a moving speed detection method capable of specifying the movement status of a user carrying the same.

  In recent years, wireless terminals typified by mobile phones and PHS (Personal Handy phone System) have become widespread, making it possible to make calls and obtain information regardless of location or time. In addition, due to the downsizing and weight reduction, the user always carries a wireless terminal, and there is a high possibility that even a partner whose location is unknown can be contacted.

  Under such a wireless communication system, a user can accept a necessary incoming call under any circumstances by simply turning on a wireless terminal owned by the user. However, this leads to a result that prompts the user to use the wireless terminal even in a situation where the wireless terminal should not be used, for example, in the case of driving a car. In order to avoid use in such a situation, the wireless terminal is provided with a so-called “drive mode (public mode)” function that notifies the caller that use is difficult during driving.

  In addition, based on the connection to the in-vehicle adapter and the change in signal strength or signal quality input to its own wireless terminal, it is determined whether the wireless terminal is moving at high speed or low speed and automatically A technique for setting the manner mode is disclosed (for example, Patent Document 1).

Furthermore, a technique for detecting a moving state according to the switching frequency of a wireless communication path by the communication path switching means for its own wireless terminal, that is, the frequency of occurrence of handover, and automatically setting the manner mode is also disclosed (for example, Patent Document 2).
JP 2001-157268 A JP 2002-369250 A

  However, in the technology for determining the movement state based on the change in signal strength or signal quality input to its own wireless terminal, it is not caused by the movement of the user, for example, by blocking the vehicle between itself and the base station. Even when the signal intensity changes, it is determined that the vehicle is moving at high speed. In addition, in a state where frequent handovers are repeated, it is impossible to determine the moving speed using only the signal strength change.

  In addition, the technique for detecting the movement state according to the frequency of occurrence of handover is merely counting the number of handovers. For example, wireless technology in an environment where the radio wave condition is bad or near the boundary of the radio wave arrival area of the base station When the terminal is used, there is a problem in that handover occurs frequently even when the user is stationary or moving at a low speed, and the mode is unintentionally shifted to the manner mode based on the determination that the user is moving at a high speed.

  The present invention has been made in view of the above-described problems of the conventional method for detecting a moving speed of a user, and an object of the present invention is to recognize a user's high-speed movement quickly and surely, thereby It is to provide a new and improved wireless terminal and moving speed detection method capable of automatically setting and canceling the drive mode and manner mode without troublesome, and avoiding the adverse effects of incoming calls due to forgotten mode switching. .

  In order to solve the above-described problem, according to an aspect of the present invention, a wireless communication unit that acquires an identifier unique to a base station in a communicable range, and when an identifier acquisition target is changed, acquired after the change The identifier storage unit for storing the identifier and the number of different identifiers stored in the past predetermined time are compared with a predetermined high speed threshold, and when the predetermined high speed threshold is exceeded, the wireless terminal is moving at high speed There is provided a wireless terminal comprising a high-speed movement detection unit for detecting the movement. Here, the change of the identifier acquisition target is a concept including the change, addition, and loss of the base station from which the identifier is acquired.

  Simply counting the change in the identifier acquisition target, for example, frequently switches the acquisition target in an environment where the radio wave condition is poor or near the boundary of the radio wave arrival area of the base station, and misidentifies that the user is moving at high speed. There is a fear. This is because repetitive switching occurs between equal combinations of base stations. In the present invention, the fact that the acquisition target of the identifier has changed and that the change is not performed between base stations of the same combination indicates that the number of different identifiers stored in the past predetermined time ( This is determined by comparing the base station occurrence rate per unit time) with a predetermined high-speed threshold. In this way, it is possible to quickly and reliably recognize the high-speed movement of the user.

  In this way, by detecting the high-speed movement, the operation application (for example, standby screen or playback music) of the wireless terminal is automatically changed, or the movement path of the child or the elderly is monitored via the wireless terminal. In the monitoring system, it can be used for the observer to grasp the moving speed.

  As specific examples of the identifier acquisition target, (1) all base stations in a communicable range, (2) a paging channel source base station for waiting for an incoming call, and (3) wireless communication has been established. It is possible to determine whether the mobile station is moving at high speed based on the occurrence rate of different base stations in any of the base stations.

  Therefore, the wireless communication unit may acquire identifiers of all base stations in the communicable range, the identifier storage unit may store all identifiers after the change, or the wireless communication unit may be used for waiting for an incoming call. The paging channel is received, the identifier of the transmission source base station is acquired, and the identifier storage unit may store the identifier of the base station after switching when the transmission source base station of the paging channel is switched, The wireless communication unit may acquire an identifier of a base station that has established wireless communication, and the identifier storage unit may store the identifier of the base station after the handover when a handover occurs.

  When the high-speed movement detection unit detects that the high-speed movement is being performed, the wireless terminal may further include a mode setting unit that sets the wireless terminal to a drive mode or a manner mode and cancels the mode when high-speed movement is not detected. .

  With such a configuration in which the high-speed movement of the user is recognized quickly and reliably by the wireless terminal itself, the drive mode and the manner mode can be automatically set and canceled without bothering the user. Therefore, it is possible to avoid the adverse effects of incoming calls such as forgetting mode switching and performing normal incoming calls during high-speed movement.

  The high-speed movement detection unit may not cancel the detection state during high-speed movement until a predetermined low-speed threshold value that is smaller than a predetermined high-speed threshold value is reached.

  By providing a hysteresis characteristic to the release during such high speed movement, when it is necessary to determine that it is stopped or moving at a low speed but is moving at high speed, for example, when the signal is only stopped while moving in an automobile, It is possible to avoid the problem that high-speed movement is easily released.

  In order to solve the above problem, according to still another aspect of the present invention, an identifier unique to a base station in a communicable range is acquired, and when there is a change in an identifier acquisition target, an identifier acquired after the change is obtained. The number of different identifiers stored in the past predetermined time is compared with a predetermined high speed threshold, and when the number exceeds a predetermined high speed threshold, it is detected that the wireless terminal is moving at high speed. A moving speed detection method is provided.

  The components corresponding to the technical idea in the wireless terminal and the description thereof can be applied to the moving speed detection method.

  As described above, the wireless terminal of the present invention recognizes the high-speed movement of the user quickly and reliably, and automatically sets and cancels the drive mode and the manner mode without bothering the user. Therefore, it is possible to avoid the adverse effects of incoming calls due to forgotten mode switching.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  Wireless terminals such as mobile phones and PHS can communicate with other terminals using a wireless communication system. In particular, wireless communication with a base station is established in a mobile phone, a PHS, or the like.

(Wireless communication system 100)
FIG. 1 is a system block diagram for explaining the radio communication system 100. The wireless communication system 100 includes a relay server 110, a communication network 120 such as the Internet or a dedicated line, a base station 130, and a wireless terminal 140 owned by a user.

  In the wireless communication system 100, when attempting to make a call to another wireless terminal 150 using the wireless terminal 140, the user 152 operates the wireless terminal 140 of the user 152, and the base station 130 in the wireless communication available area. Wireless communication with the other wireless terminal 150 of the communication partner 154 via the communication network 120, the relay server 110, and the base station 130 in the wireless communicable area of the other wireless terminal 150. Carry out. A user can connect the wireless terminal 140 to the communication network 120 via the relay server 110 and receive various services from the Internet or the like.

  Further, when the communication state with the base station 130 connected so far deteriorates due to the movement of the user 152 itself, communication with a new base station having a good radio wave condition is established and becomes a wireless communication target. Migrate base stations. Such a transition operation is called handover.

  Under the wireless communication system 100, since wireless communication with the base station 130 in the communicable range is possible at any location, the user 152 simply turns on the wireless terminal 140 owned by the user 152, Necessary incoming calls can be accepted under any circumstances. Further, in a situation where the wireless terminal 140 should not be used such as during driving of a car, a so-called “drive mode (public mode)” function is provided to notify the caller that use is difficult during driving.

  The user 152 can set the drive mode manually or automatically. Here, the automatic setting of the drive mode may be performed according to the frequency of switching (handover) of the base station 130 to be wirelessly communicated due to high-speed movement in an automobile or the like.

  However, if the number of handovers is simply counted, for example, handovers frequently occur in an environment where the radio wave condition is poor or near the boundary of the radio wave arrival area of the base station, and there is a possibility that the user 152 may mistakenly recognize that the user 152 is moving at high speed. . This is because repeated handovers occur between the same combination of base stations 130.

  In the present embodiment, it is stored in the past predetermined time that the base station 130 subject to wireless communication is changing and that the change is not performed between the base stations 130 of the same combination. The determination is made by comparing the number of different identifiers (base station occurrence rate per unit time) with a predetermined high-speed threshold. In this way, it is possible to quickly and reliably recognize the high-speed movement of the user.

  Hereinafter, a configuration of the wireless terminal 140 in the wireless communication system 100 and a moving speed detection method using the wireless terminal 140 will be described in detail.

(Wireless terminal 140)
FIG. 2 is a functional block diagram illustrating a schematic function of the wireless terminal 140. The wireless terminal 140 includes a terminal control unit 210, a memory 212, a display unit 214, an operation unit 216, and a wireless communication unit 218.

  The terminal control unit 210 manages and controls the entire wireless terminal 140 using a semiconductor integrated circuit including a central processing unit (CPU). The terminal control unit 210 performs a call function and a mail delivery function using the wireless terminal 140 using the program in the memory 212. It also functions as an identifier storage unit 230, a high-speed movement detection unit 232, and a mode setting unit 234, which will be described later.

The memory 212 includes a ROM, a RAM, an E ² PROM, a nonvolatile RAM, a flash memory, an HDD, and the like, and stores a program processed by the terminal control unit 210.

  The display unit 214 is configured by a color or single color display, and is stored in the memory 212 or provided from an application server (not shown) via a communication network, or a GUI (Graphical User Interface) of an application. ) Can be displayed.

  The operation unit 216 includes switches such as a keyboard, a cross key, and a joystick, and receives a user operation input.

  The wireless communication unit 218 performs wireless communication with the base station 130 in the wireless communication system 100. As such wireless communication, there is a time division multiplexing method in which communication is performed by allocating a plurality of time slots obtained by time division of frames in the base station 130 to the channels of the wireless terminal 140, respectively. Also, the wireless communication unit 218 exchanges communication signals with the base station 130 in the communicable range, and acquires an identifier (ID) unique to the base station 130 included in the communication signal.

  When there is a change in the identifier acquisition target, that is, when there is a change, addition, or loss of the target base station 130, the identifier storage unit 230 stores the identifier acquired after the change in the memory 212.

  The high-speed movement detection unit 232 compares the number of different identifiers stored in the past predetermined time (hereinafter simply referred to as the number of base station occurrences) with a predetermined high-speed threshold, It detects that the wireless terminal 140 is moving at high speed. This comparison process will be described in detail later.

  As described above, by detecting that the wireless terminal 140 is moving at high speed, the operation application (for example, standby screen or playback music) of the wireless terminal 140 is automatically changed, or the movement route of the child or the elderly is changed to the wireless terminal. In the monitoring system that monitors via 140, the monitoring speed can be used by the monitor.

  In addition, once the high-speed movement detection unit 232 detects that the number of generated base stations exceeds a predetermined threshold value and is moving at a high speed, the high-speed movement detection unit 232 does not simply release the high-speed movement below the predetermined high-speed threshold, The detection state during high-speed movement is canceled only when the speed is below a predetermined low-speed threshold smaller than the high-speed threshold.

  In this way, by providing hysteresis characteristics for cancellation during high-speed movement, it is necessary to determine that it is stopped or moving at low speed but it is moving at high speed, for example, only when the signal is stopped while moving in an automobile Therefore, it is possible to avoid the problem that the high-speed movement is easily released.

  When the mode setting unit 234 detects that the high-speed movement detection unit 232 is moving at high speed, the mode setting unit 234 suppresses the wireless terminal 140 from “drive mode” indicating that the vehicle is in operation, or a ringing tone and a mail ringing tone. Set to “Manner mode” and cancel the mode when high speed movement is not detected. Each of these modes can be performed manually by the user or automatically according to the present embodiment. In addition, when the user's moving means can grasp whether it is a car or other public vehicle such as a train depending on the moving speed, for example, when it can be grasped that it is a train because a predetermined speed continues for a certain time, manners The mode may be specified and set.

  With the configuration in which the high-speed movement of the user is recognized quickly and reliably by the wireless terminal 140 itself, the drive mode and the manner mode can be automatically set and canceled without bothering the user. Therefore, it is possible to avoid the adverse effects of incoming calls such as forgetting mode switching and performing normal incoming calls during high-speed movement.

  As specific examples of the identifier acquisition target, (1) all base stations in a communicable range, (2) a paging channel source base station for waiting for an incoming call, and (3) wireless communication has been established. It is possible to determine whether the mobile station is moving at high speed based on its occurrence rate. Here, three typical situations are assumed. However, the present invention is not limited to this, and it is possible to grasp a base station 130 that is close to its own radio terminal 140 among base stations 130 that are spaced apart from each other. If it is a signal, for example, various signals such as a control signal from a base station can be applied.

  Here, (1) when all the base stations 130 in the communicable range are acquisition targets, the wireless communication unit 218 acquires the identifiers of all the base stations 130 in the communicable range, and the identifier storage unit 230 All identifiers of are stored.

  (2) When the source base station 130 of the paging channel for waiting for an incoming call is an acquisition target, the wireless communication unit 218 receives the paging channel for waiting for an incoming call, and acquires the identifier of the source base station 130 The identifier storage unit 230 stores the identifier of the base station 130 after switching when the transmission source base station 130 of the paging channel is switched. Here, waiting means receiving a control signal intermittently from the base station 130 using a paging channel in order to receive an incoming call from the communication partner 154.

  (3) When a base station that has established wireless communication is an acquisition target, the wireless communication unit 218 acquires the identifier of the base station 130 that has established wireless communication, and the identifier storage unit 230 has undergone a handover. In this case, the identifier of the base station 130 after the handover is stored.

  Hereinafter, among the above three acquisition targets, the case of (3) handover will be described as an example. Here, a typical example is shown for easy understanding, but it is needless to say that this description is applicable to (1) a communicable base station and (2) a standby base station.

  FIG. 3 is an explanatory diagram for explaining the derivation of the number of base stations generated by the high-speed movement detection unit 232 and the comparison with the high-speed threshold. Here, a case where the user 152 travels while driving the automobile 250 is shown.

  As shown in FIG. 3A, when the automobile 250 travels between the base stations 130A, 130B, 130C, and 130D, the radio terminal 140 is a base station having a strong radio field intensity with the radio terminal 140, that is, a linear distance. Are sequentially established, and handover is performed in the order of base station 130A → base station 130B → base station 130C → base station 130D.

  Here, the identifier storage unit 230 stores the identifier of the base station 130 after the handover at the time of the handover and the handover time in the memory 212 in association with each other. Therefore, the base station list 260 is generated in the memory 212 as shown in FIG.

  First, the high-speed movement detection unit 232 first determines different identifiers (130A, 130A, 130A, 12A, 10B, and 12F) stored within 10 seconds from the present (12:00:10) within the past predetermined time. 130B, 130C, 130D) (number of base station occurrences) is counted. Here, the base station generation number is “4”. Further, the high-speed movement detection unit 232 compares a predetermined high-speed threshold value set in advance, “3” here, with the counted number of base station occurrences “4”, and is equal to or higher than the predetermined high-speed threshold value. It detects that the wireless terminal 140 is moving at high speed. Here, in order to facilitate understanding, 130A, 130B, 130C, and 130D are used as identifiers of the base station 130, but it goes without saying that various combinations of identifiers can be configured by alphabets, numerical values, and the like. Further, the predetermined time and the high-speed threshold used in the above description are merely examples, and other values can naturally be adopted.

  FIG. 4 is an explanatory diagram for explaining another method of deriving the number of base stations generated by the high-speed movement detection unit 232. According to FIG. 4, at time 11:59:54, the high-speed movement detection unit 232 detects the base station 130 </ b> Y and adds it to the base station list 270. At the same time, the timer counter 272 for the base station 130Y starts counting for a predetermined time (here, 10 seconds).

  Subsequently, at time 11:59:57, the high-speed movement detection unit 232 detects the base station 130Z and adds it to the base station list 270 in the same manner as the base station 130Y, and counts the timer counter 274 for the base station 130Z. Start. Thereafter, the addition and counting of the identifier of the base station 130 are repeated in the same manner. However, if there is an identifier of the same base station 130, the count for the base station 130 is reset and started, and no identifier is added.

  When the time counter 272 completes 276 counting for 10 seconds, this time, the identifier of the base station 130Y is deleted from the base station list 270. Thereafter, the identifier of the base station 130 that has been counted in the same manner is deleted.

  With this configuration, only identifiers of base stations that have been updated within the past 10 seconds remain in the identifier list 270, and the number of occurrences of base stations can be grasped only by counting the number of such identifiers. For example, in the example of FIG. 4, the number of base station occurrences becomes “3” or more which is a predetermined high speed threshold from time 12:00:00, and it is detected that high speed movement is being performed from time 12:00:00.

  The method of deriving the number of base stations generated by the high-speed movement detection unit 232 is not limited to the above-described method. For example, the base station 130 that has established wireless communication is periodically acquired and stored, and the number of base stations generated is derived. Various methods can be applied.

  FIG. 5 is an explanatory diagram showing processing of the high-speed movement detection unit 232 in the case of stationary or low-speed movement. Here, the case where the user 152 is walking at a low speed is shown.

  As shown in FIG. 5A, when the user 152 walks between the base stations 130A, 130B, 130C, and 130D, the radio terminal 140 is a base station with strong radio field strength with the radio terminal 140, as in FIG. That is, communication is established with a base station having a short straight distance, and handover is performed in the order of base station 130A → base station 130B → base station 130C → base station 130D. The identifier storage unit 230 generates a base station list 260 in the memory 212 as shown in FIG.

  First, the high-speed movement detection unit 232 stores a different identifier (130D) stored in the past predetermined time, here within 10 seconds (12:05:50 to 12:06:00) from the present (12:06:00). The number of base stations (number of base stations generated) is counted. Here, the number of generated base stations is “1”. The high-speed movement detection unit 232 compares a predetermined high-speed threshold set in advance, “3” in this case, with the counted number of base station occurrences “1”, and does not reach the predetermined high-speed threshold. Detects that it is not moving at high speed.

  FIG. 6 is an explanatory diagram showing processing of the high-speed movement detection unit 232 in an environment where the radio wave condition is poor or in the vicinity of the boundary of the radio wave arrival area of the base station 130. Here, it is assumed that the user 152 is stationary between the base stations 130A and 130B.

  As shown in FIG. 6A, when the user 152 is between the base stations 130A and 130B, the handover may be executed complicatedly. For example, as shown in FIG. 6 (a), it is a case where the object is stationary near the boundary between the radio wave arrival areas.

  Here, the identifier storage unit 230 generates a base station list 260 in the memory 212 as shown in FIG. First, the high-speed movement detection unit 232 stores different identifiers (130A, 130B) stored within 10 seconds (12:00:00 to 12:00:10) from the present (12:00:10) in the past predetermined time. The number of base stations (number of base stations generated) is counted. Here, it is “2”. Further, the high-speed movement detection unit 232 compares the predetermined high-speed threshold “3” set in advance with the counted number of base station occurrences “2”, and has not reached the predetermined high-speed threshold. Detects that it is not moving at high speed.

  FIG. 7 is an explanatory diagram for explaining another method for deriving the number of base stations generated by the high-speed movement detection unit 232. According to FIG. 7, the high-speed movement detection unit 232 detects the base station 130C and adds it to the base station list 270 at time 11:59:54. At the same time, the timer counter 280 for the base station 130C starts counting for a predetermined time (here, 10 seconds).

  Subsequently, at time 11:59:57, the high-speed movement detection unit 232 detects the base station 130B and adds it to the base station list 270 in the same manner as the base station 130Y, and counts the timer counter 282 for the base station 130B. Start. Thereafter, the addition and counting of the identifier of the base station 130 are repeated in the same manner. However, even if the base station 130B is detected at time 12:00:03, since the base station B has already been stored in the base station list 270, only the counter 280 is reset and no identifier is added.

  With this configuration, only the identifier of the base station 130 updated within the past 10 seconds remains in the identifier list 270. For example, in the example of FIG. 7, only the time 12:00:00 to 12:00:03 moves at high speed. After that, it is not moving at high speed.

  In this embodiment, in addition to the fact that the identifier acquisition target has changed as described above, it is stored within the past predetermined time that the change is not performed between base stations of the same combination. Judgment is made by comparing the number of different identifiers (base station occurrence rate per unit time) with a predetermined high-speed threshold. In this way, it is possible to quickly and reliably recognize the high-speed movement of the user.

  Next, a moving speed detection method for detecting the moving speed of the user 152 using the wireless terminal 140 described above will be described.

(Movement speed detection method)
FIG. 8 is a flowchart showing a process flow of the moving speed detection method. When the wireless communication unit 218 of the wireless terminal 140 acquires an identifier unique to the base station 130 in the communicable range (S300), and the identifier storage unit 230 changes the identifier acquisition target due to handover or the like, The acquired identifier is stored (S302).

  Then, the high-speed movement detection unit 232 compares the number of different identifiers (number of base station occurrences) stored in the past predetermined time with a predetermined high-speed threshold (S304), It is detected that the terminal 140 is moving at high speed (S306). Finally, the mode setting unit 234 determines the detection contents of the high-speed movement detection unit 232 (S308). If the high-speed movement is being performed, the wireless terminal 140 is set to the drive mode or the manner mode (S310), and the high-speed movement is being performed. If no is detected, each mode is canceled (S312).

  In the movement speed detection method described above, it is possible to quickly and reliably recognize a user's high-speed movement, and it is possible to automatically set and cancel the drive mode and manner mode without bothering the user. Become. Therefore, it is possible to avoid the adverse effects of incoming calls due to forgotten mode switching.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention is applied to a wireless terminal such as a mobile phone, and more specifically, can be used for a wireless terminal and a moving speed detection method capable of specifying the movement status of a user carrying the mobile phone.

It is a system block diagram for demonstrating a radio | wireless communications system. It is the functional block diagram which showed the schematic function of the radio | wireless terminal. It is explanatory drawing for demonstrating the derivation | leading-out of the base station generation number by a high-speed movement detection part, and the comparison with a high-speed threshold value. It is explanatory drawing for demonstrating the other derivation | leading-out method of the base station generation | occurrence | production number by a high-speed movement detection part. It is explanatory drawing which showed the process of the high-speed movement detection part in the case of a still or low speed movement. It is explanatory drawing which showed the process of the high-speed movement detection part in the vicinity of the boundary of the radio wave arrival area of a base station in the environment where radio wave condition is bad. It is explanatory drawing for demonstrating the other derivation | leading-out method of the base station generation | occurrence | production number by a high-speed movement detection part. It is the flowchart which showed the flow of the process of the moving speed detection method.

Explanation of symbols

100 wireless communication system 130 base station 140 wireless terminal 218 wireless communication unit 230 identifier storage unit 232 high-speed movement detection unit 234 mode setting unit

Claims (7)

A wireless communication unit that acquires an identifier unique to the base station in a communicable range;
When there is a change in the acquisition target of the identifier, an identifier storage unit that stores the identifier acquired after the change;
A high-speed movement detection unit that compares the number of different identifiers stored in the past predetermined time with a predetermined high-speed threshold and detects that the wireless terminal is moving at a high speed when the number exceeds the predetermined high-speed threshold; ,
A wireless terminal comprising: The wireless communication unit acquires identifiers of all base stations in a communicable range,
The wireless terminal according to claim 1, wherein the identifier storage unit stores all identifiers after the change. The wireless communication unit receives a paging channel for waiting for an incoming call, obtains an identifier of the source base station,
The wireless terminal according to claim 1, wherein the identifier storage unit stores an identifier of the base station after the switching when the transmission source base station of the paging channel is switched. The wireless communication unit obtains an identifier of a base station that has established wireless communication,
The wireless terminal according to claim 1, wherein the identifier storage unit stores an identifier of a base station after the handover when a handover occurs.   When the high-speed movement detecting unit detects that the high-speed movement is being performed, the wireless terminal further includes a mode setting unit that sets the wireless terminal to a drive mode or a manner mode and cancels the mode when high-speed movement is not detected. The wireless terminal according to claim 1, wherein:   The wireless terminal according to claim 1, wherein the high-speed movement detection unit does not cancel a detection state during high-speed movement until a predetermined low-speed threshold value that is smaller than the predetermined high-speed threshold value is reached. . Obtain a unique identifier for the base station in the communicable range,
When there is a change in the acquisition target of the identifier, the identifier acquired after the change is stored,
The number of different identifiers stored in the past predetermined time is compared with a predetermined high speed threshold, and when the number exceeds the predetermined high speed threshold, it is detected that the wireless terminal is moving at high speed , Moving speed detection method.

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