JP2000092540A - Mobile radio communication system, mobile radio terminal equipment and method for detecting moving speed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to detect the moving speed of a mobile radio terminal in a mobile radio communication system. SOLUTION: The mobile radio terminal PS detects the electric field strength of signals outputted from base stations BS1 to BS3 and informs a control station CS of detected results. The control station CS monitors the electric field strength information from the equipment PS by an electronic field strength change monitor means 200b, detects its change level and records the detected result in an electric field strength change information storing area 210c. A handover monitor means 200a totalizes the number of times of handover, reads out the cell size of the base station to be a moving destination from a cell size storage area 210a, adds the cell size to the totalized result and records the added result in a handover information storage area 210b. A moving speed judging means 200c judges the moving speed of the terminal equipment PS based on the information stored in those areas 210b, 210c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio terminal device and a moving speed detecting method in a mobile radio communication system such as a portable telephone system.

[0002]

2. Description of the Related Art As is well known, in a mobile radio communication system, when a mobile radio terminal device moves at high speed, a radio channel environment between the mobile radio terminal device and a base station device generally deteriorates. On the other hand, by lowering the information transmission rate, it is possible to cope with communication with a mobile wireless terminal device that moves at high speed.
Such measures are disadvantageous for a mobile wireless terminal device in a stopped state or moving at a low speed.

[0003] For this reason, the present inventors have been developing a technique for changing an information transmission rate or the like in accordance with the moving speed of the mobile radio terminal device. The technology development required was urgently needed.

[0004]

There has been a strong demand for establishing a technique for determining the moving speed of a mobile radio terminal device. SUMMARY OF THE INVENTION The present invention has been made to meet the above-mentioned demands, and has as its object to provide a mobile radio communication system, a mobile radio terminal device, and a moving speed detection method capable of determining a moving speed of a mobile radio terminal device. .

[0005]

In order to achieve the above object, the present invention relates to a plurality of mobile radio terminals, connected to the mobile radio terminals via a radio communication line, and connected to a public network. In a mobile radio communication system including a plurality of base station devices and a control station device that performs handover control when the mobile radio terminal device moves between radio zones formed by the plurality of base station devices, Handover monitoring means for determining the frequency of occurrence for each of the mobile radio terminal apparatuses, zone size storage means for storing the size of each radio zone of the plurality of base station apparatuses, and a base station apparatus of a movement destination when handover occurs Zone size detecting means for obtaining the size of the wireless zone from the zone size storing means, and a reception signal from the base station device in the mobile radio terminal device. The intensity fluctuation of the mobile radio terminal device, the frequency of handover occurrence obtained by the handover monitoring unit, the size of the wireless zone obtained by the zone size detection unit, and the intensity fluctuation monitoring unit. A moving speed detecting means for calculating a moving speed of the mobile radio terminal device based on the obtained fluctuation of the intensity of the received signal is provided.

In the mobile radio communication system having the above-described configuration, the frequency of occurrence of handover for each mobile radio terminal, the size of the radio zone of the base station to which the mobile radio terminal moves, and the reception from the base station in the mobile radio terminal. The moving speed of the mobile wireless terminal device is determined based on the signal strength fluctuation.

Therefore, according to the mobile radio communication system having the above-described configuration, the mobile speed can be obtained without mounting an accelerometer, a gyro, and the like conventionally used for detecting the mobile speed on the mobile radio terminal device.

According to another aspect of the present invention, there is provided a mobile radio communication apparatus which communicates with a base station apparatus connectable to a public network via a radio communication line. A plurality of receiving means for receiving radio frequency signals arriving through the apparatus; an intensity variation detecting means for obtaining an intensity variation of a signal having the most intense intensity variation among signals respectively received by the plurality of receiving means; A moving speed detecting means for calculating a moving speed of the own apparatus based on the intensity fluctuation obtained by the detecting means is provided.

In the mobile radio terminal having the above configuration, among the signals received by the plurality of receiving means from the base station apparatus arriving via the plurality of paths, the signal having the most intense fluctuation in the intensity of the signal. , The moving speed of the own device is obtained.

Therefore, according to the mobile radio terminal device having the above-described structure, the mobile radio terminal device is not equipped with an accelerometer or a gyro conventionally used for detecting a moving speed, and can be further improved on the basis of a received signal on a route closest to the moving direction. It is possible to accurately determine the moving speed of the own aircraft.

Further, in order to achieve the above object, the present invention provides a mobile radio communication apparatus which communicates with a base station apparatus connectable to a public network through a radio communication line, wherein a plurality of routes are transmitted from the base station apparatus. Delay profile creating means for determining a delay profile of a plurality of radio frequency signals arriving through the plurality of radio frequency signals, and a delay time difference between the plurality of radio frequency signals arriving via the plurality of paths based on the delay profile obtained by the delay profile creating means. A delay profile variation monitoring means for determining a variation; and a movement speed detection means for determining a movement speed of the own device based on a variation in a delay time difference between a plurality of radio frequency signals determined by the delay profile variation monitoring means. To be configured.

In the mobile radio terminal having the above-described configuration, the moving speed of the mobile radio terminal is obtained based on the fluctuation of the delay time difference between a plurality of radio frequency signals arriving via a plurality of routes from the base station.

Therefore, according to the mobile radio terminal having the above-mentioned configuration, the mobile radio terminal based on the received signal from the base station apparatus does not have to be equipped with an accelerometer or a gyro which is conventionally used for detecting the moving speed. Speed can be determined.

In order to achieve the above object, according to the present invention, there are provided a plurality of mobile radio terminal apparatuses and a plurality of base station apparatuses which are connected to the mobile radio terminal apparatuses via a radio communication line and are connectable to a public network. Movement of the mobile radio terminal device used in the mobile radio communication system, comprising: a control station device for performing handover control when the mobile radio terminal device moves between radio zones formed by the plurality of base station devices. A speed detection method, comprising: a first step of determining a frequency of occurrence of handover for each mobile radio terminal apparatus; and, when a handover occurs, determining a size of a radio zone of a destination base station apparatus by a plurality of base stations. The second step of obtaining from the zone size storage means for storing the size of each wireless zone of the device, and the variation of the strength of the signal received from the base station device in the mobile wireless terminal device Third obtaining for each mobile radio terminal
Mobile radio terminal based on the frequency of handover occurrence determined in the first step, the size of the wireless zone determined in the second step, and the received signal strength variation determined in the third step. And a fourth step for determining the moving speed of the apparatus.

In the moving speed detecting method having the above structure, the frequency of occurrence of handover for each mobile radio terminal device, the size of the radio zone of the base station device to which the mobile terminal is moved, and the reception from the base station device in the mobile radio terminal device The moving speed of the mobile wireless terminal device is determined based on the signal strength fluctuation.

Therefore, according to the moving speed detecting method having the above-described configuration, the moving speed of the mobile radio terminal device is obtained without providing the mobile radio terminal device with an accelerometer or a gyro conventionally used for detecting the moving speed. be able to.

Further, in order to achieve the above object, a moving speed detecting method according to the present invention provides a moving speed detecting method for a mobile radio communication device which communicates with a base station device connectable to a public network through a radio communication line. A first step of receiving radio frequency signals arriving via a plurality of paths from the base station apparatus, and a signal having the most intense fluctuation among the signals received in the first step. A second step for obtaining the intensity fluctuation and a third step for obtaining the moving speed of the mobile radio terminal device based on the intensity fluctuation obtained in the second step are provided.

In the moving speed detecting method having the above-described structure, among the signals received by the plurality of receiving means, the radio frequency signals arriving from the base station apparatus via the plurality of paths, respectively, of the signals having the most intense fluctuations. , The moving speed of the mobile radio terminal device is obtained.

Therefore, according to the moving speed detecting method having the above-described structure, an accelerometer, a gyro, and the like conventionally used for detecting the moving speed are not provided, and the moving speed detecting method based on the received signal on the route closest to the moving direction is used. The moving speed of the mobile wireless terminal device can be accurately obtained.

Further, in order to achieve the above object, a moving speed detecting method according to the present invention is directed to a moving speed detecting method for a mobile radio communication device which communicates with a base station device connectable to a public network via a radio communication line. And a first step of obtaining a delay profile of a plurality of radio frequency signals arriving from the base station device via the plurality of paths, and a plurality of paths based on the delay profiles obtained in the first step. A second step of obtaining a change in delay time difference between a plurality of radio frequency signals arriving through the second step, and moving the mobile radio terminal apparatus based on the change in delay time difference between the plurality of radio frequency signals obtained in the second step. And a third step of obtaining a speed.

In the moving speed detecting method having the above configuration, the moving speed of the mobile radio terminal device is obtained from the base station device based on the fluctuation of the delay time difference between a plurality of radio frequency signals arriving via a plurality of routes. ing.

Therefore, according to the moving speed detecting method having the above-described configuration, the mobile radio terminal device can be provided based on the received signal from the base station device without using an accelerometer, a gyro or the like conventionally used for detecting the moving speed. Can be determined.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a mobile radio communication system according to a first embodiment of the present invention.

The mobile radio terminal PS shown in FIG.
As shown in FIG. 1, the apparatus includes an antenna 101, a radio unit 102, a signal processing unit 103, a speaker 104, a microphone 105, and a control unit 110.

Radio frequency signals radiated into space from base stations BS1 to BS3 shown in FIG. 1 are received by antenna 101, demodulated by radio section 102, and then processed by signal processing section 1.
03 is decoded into an analog audio signal, and the speaker 104
More loudspeaker output.

On the other hand, the transmission voice input from the microphone 105 is encoded by the signal processing unit 103 and then modulated by the radio unit 102 into a radio frequency signal.
1 is transmitted to base stations BS1 to BS3.

The control unit 110 controls the mobile radio terminal P
Each part of S is generally controlled. Further, the control unit 110 is newly provided with an electric field intensity detection unit 110a. The electric field strength detecting means 110a monitors the signal demodulated by the radio section 102, and detects the electric field strength of a signal transmitted from the base stations BS1 to BS3 to its own device at a predetermined cycle.

The information on the electric field strength detected here is shown in FIG.
As shown in (1), detection is performed in three stages of α, β, γ (α>β> γ) according to the distance from the base stations BS1 to BS3. The electric field strength information is input to the signal processing unit 103, where it is added to the coded audio information and the position registration information at the time of standby, and the base stations BS1 to BS3 are transmitted through the radio unit 102 and the antenna 101. And is notified to the control station CS.

The control station CS shown in FIG. 1 includes a control unit 200 and a storage unit 210, and includes a base station B accommodated in a mobile communication network.
S1 to BS3 are supervised, and base stations BS1 to BS3
, Management of the position (existing area) of the mobile radio terminal PS, connection control between the mobile radio terminal PS and a communication station on a mobile communication network and a public network, and handover control accompanying the movement of the mobile radio terminal PS And management of usage fees.

The control station CS provides the control unit 200 with a handover monitoring means 200a as a new control function.
And an electric field intensity fluctuation monitoring unit 200b and a moving speed determination unit 200c.

The handover monitoring means 200a monitors the occurrence of handover, and
For each S, the number of handovers performed within a predetermined time is totaled, and numerical data corresponding to the cell size of the destination base station is stored in a cell size storage area 210a to be described later.
And cumulative addition. Then, for each mobile radio terminal apparatus PS, the number of occurrences of the handover is associated with the cumulative addition result of the cell size of the destination base station,
It is recorded in the handover information storage area 210b of the storage unit 210.

The electric field intensity fluctuation monitoring means 200b monitors electric field intensity information notified from the mobile radio terminal PS through the base stations BS1 to BS3 and detects the magnitude of the fluctuation. The information is recorded in an electric field intensity fluctuation information storage area 210c described later in association with the identification information of the wireless terminal device PS.

The moving speed determining means 200c determines the moving speed of the mobile radio terminal PS at a predetermined cycle based on the information stored in the handover information storage area 210b and the electric field strength fluctuation information storage area 210c. is there.

The storage section 210 has an area for storing a control program of the control station CS, and further includes a cell size storage area 210a and a handover information storage area 2a.
10b and an electric field intensity fluctuation information storage area 210c.

The cell size storage area 210a is an area for storing the cell size (the size of the radio zone) of the base stations BS1 to BS3 accommodated by the mobile radio communication system as numerical data corresponding to each size. .

The handover information storage area 210b stores
This area stores, for each mobile radio terminal PS, the number of times of handover performed within a predetermined time period and the cumulative addition result of the cell size of the base station to which the mobile station has moved at the time of the handover. The electric field strength fluctuation information storage area 210c is
This area stores the magnitude of the fluctuation of the electric field strength information for each mobile wireless terminal device PS.

Next, the speed detection operation of the mobile radio terminal PS of the mobile radio communication system having the above configuration will be described below. Here, as shown in FIG.
The case where S passes from the area A1 of the base station BS1 through the area A2 of the base station BS2 and reaches the area A3 of the base station BS3 will be described as an example.

The mobile radio terminal PS is controlled by the electric field strength detecting means 110a irrespective of the occurrence of the handover.
The signal demodulated by the radio unit 102 is monitored and the base station B
The electric field strength of a signal transmitted from S1 to BS3 to its own device is detected at a predetermined cycle. Then, the detection result is notified to the control station CS via the base stations BS1 to BS3.

On the other hand, the control station CS monitors the electric field strength information notified from the mobile radio terminal PS by the electric field strength fluctuation monitoring means 200b, detects the magnitude of the fluctuation, and reports the detection result to the mobile radio station. The information is recorded in the electric field intensity fluctuation information storage area 210c in association with the identification information of the terminal device PS.

In the control station CS, due to the movement of the mobile radio terminal PS as described above, the handover monitoring means 200a counts the number of handovers performed within a predetermined time as "2", and The cell size of the base stations BS1 and BS2 to be
Read from 10a and add.

Then, the handover monitoring means 200a
Records the result of addition of the number of handovers “2” and the cell size in the handover information storage area 210b in association with the identification information of the mobile radio terminal apparatus PS.

Thereafter, each time a predetermined time elapses, the moving speed determining means 200c moves the mobile radio terminal PS based on the information stored in the handover information storage area 210b and the electric field strength fluctuation information storage area 210c. Determine the speed.

As described above, in the mobile radio communication system having the above configuration, the mobile radio terminal PS is connected to the base stations BS1 to BSB.
The electric field strength of the received signal from S3 is detected, and the detection result is notified to the control station CS. In the control station CS, the fluctuation of the electric field strength notified from the mobile radio terminal apparatus PS, the frequency of occurrence of handover, On the basis of the accumulated value of the cell size of the base station to which the handover has been performed, the mobile radio terminal P
The moving speed of S is determined.

Therefore, according to the mobile radio communication system having the above-described configuration, the mobile speed can be obtained without providing the mobile radio terminal PS with an accelerometer, a gyro or the like conventionally used for detecting the mobile speed. .

FIG. 4 shows an example of a criterion for determining the moving speed.
In this determination criterion example, the moving speed of the mobile wireless terminal device PS is determined in eight steps based on a combination of the size of the cell size of the destination base station, the number of times of handover, and the magnitude of the fluctuation of the electric field strength.

According to this criterion, when the received electric field strength fluctuates greatly, it is determined that the mobile radio terminal PS has moved from the edge of a cell of a certain base station to the center of the cell near the base station and to the edge of the cell. If it is estimated and, in addition, the frequency of handover is high, it is presumed that the repetition of the above-described movement has been performed, and the moving speed is the highest.

When the fluctuation of the received electric field intensity is small and the frequency of handover is high, it is estimated that the mobile terminal is moving near the cell boundary at low speed. On the other hand, if the received electric field strength fluctuates greatly and the frequency of handover is low,
It is estimated that they are moving at a moderate speed across the cell. Also, basically, it is estimated that the amount of change in the received electric field intensity is smaller when the large cell moves than when the small cell moves, even when moving at a higher speed.

The present invention is not limited to the above embodiment. For example, the mobile radio terminal apparatus PS and the base stations BS1 to BS3 detect the fluctuation of the received electric field strength, monitor the frequency of occurrence of handover, and send the cell size information of the base station that has been moved to the control station CS. In response, the moving speed of the mobile wireless terminal device PS may be obtained from these pieces of information. Also, base stations BS1 to BSB
S3 stores its own cell size information,
The notification may be sent to the mobile radio terminal PS.

Further, in the above embodiment, the electric field strength detection in the mobile radio terminal PS is performed in three stages of α, β, and γ as shown in FIG. 3, but the present invention is not limited to this. The number of stages may be four or more.

Next, a second embodiment of the present invention will be described. FIG. 5 shows a configuration of a mobile wireless terminal device according to the second embodiment of the present invention. FIG. 5 shows only the receiving system according to the present invention, and the description of the same transmitting system as in the related art is omitted.

The mobile radio terminal shown in this figure uses CDMA (Code Division Multiple Access) as a communication system.
And the three paths are connected to the receiving circuits 303a and 303a.
b and 303c to perform rake reception for receiving and combining.

A radio frequency signal transmitted from a base station (not shown) is received by an antenna 301 and received by receiving circuits 303a, 303b and 303 through an antenna duplexer 302.
c.

Receiving circuits 303a, 303b, 303c
Despreads and demodulates the spectrum-spread received signal with a spread code and a despread timing notified from a control unit 305 described later.

The result of this demodulation is output to control section 305 and synthesis circuit 304. The demodulation result output to the combining circuit 304 is subjected to timing adjustment and then combined, subjected to decoding processing in a subsequent signal processing unit (not shown), and reproduced as audio information.

The control unit 305 controls the respective units of the mobile radio terminal device in a centralized manner. For example, in order to perform the above-mentioned rake reception, the control unit 305 controls a searcher (not shown) to determine an appropriate spreading code and despreading timing. Detect and receive circuit 3
03a, 303b, and 303c.

The control unit 305 includes electric field intensity fluctuation detecting means 305a and moving speed determining means 305b as new control functions. Electric field intensity fluctuation detecting means 3
05a monitors the electric field strengths of the received signals demodulated by the receiving circuits 303a, 303b, and 303c, respectively, and detects the received signal (path) with the most intense (fastest) fluctuation.

The moving speed judging means 305b obtains the moving speed of its own device from the changing speed of the electric field intensity fluctuation of the received signal detected by the electric field intensity fluctuation detecting means 305a. The fluctuation of the electric field strength of the received signal is Rayleigh fluctuation, and the period of this fluctuation is the Doppler frequency depending on the moving speed. For this reason, the moving speed determination means 305b
The moving speed of the own device is obtained by measuring the Doppler frequency.

Next, the operation of detecting the moving speed of the mobile radio terminal having the above configuration will be described below. Here, as shown in FIG. 6, the mobile radio terminal apparatus transmits a signal from the base station to a direct wave (path 1), a reflected wave (path 2) by a reflector A such as a building, and similarly to a building or the like. A case where signals from three paths of the reflected wave (path 3) by the reflector B are rake-received will be described.

The control unit 305 controls the searcher by using the spreading code assigned to the base station and the spreading code assigned to itself, as shown in FIG. , 3 are determined.

Then, the control unit 305 detects the above 3
The three reception timings are received by the reception circuits 303a and 303, respectively.
3b and 303c. Thereby, the receiving circuit 3
03a, 303b, and 303c despread the signal received from the base station at the reception timing assigned by the control unit 305, and receive the signals of the three paths 1, 2, and 3.

FIG. 7 shows the delay profile at this time.
As shown in this figure, the path 1 which is a direct wave has a large received electric field strength, and the path 2 which is a reflected wave has a small received electric field strength than the path 1 but has a longer delay than the path 3 which is a reflected wave. Its strength is small.

As for the fluctuation of the reception electric field strength of each of the paths 1 to 3, the reception electric field strength of the path 1 has a small time fluctuation as shown in FIG. Also, pass 2 and pass 3
8 (b) and 8 (c) respectively show the time variation of the received electric field strength of FIG.
The time variation of pass 3 is the most intense. Therefore, it is estimated that the moving direction of the mobile wireless terminal device is closest to the path 3 among the three paths.

In such a situation, the electric field intensity fluctuation detecting means 305a detects the path 3 because the electric field intensity of the path 3 fluctuates the most as described above. On the other hand, the moving speed determination unit 305b determines that the detected path 3
The moving speed of the own device is obtained from the fluctuation speed of the electric field strength fluctuation.

As described above, in the mobile radio terminal having the above configuration, the rake reception monitors the electric field strength fluctuations of the reception signals of a plurality of paths, and determines from the fluctuation speed of the electric field strengths of the reception signals of the paths with the most fluctuation. , To determine the moving speed of the own aircraft.

Therefore, according to the mobile radio terminal device having the above-described configuration, it is possible to provide a mobile radio terminal device based on a received signal of a path closest to the moving direction without using an accelerometer or a gyro used for detecting a moving speed. It is possible to accurately determine the moving speed of the own aircraft.

Next, a third embodiment of the present invention will be described. FIG. 9 shows a configuration of a mobile wireless terminal device according to the third embodiment of the present invention. FIG. 9 shows only a receiving system according to the present invention, and a description of a transmitting system similar to the conventional system is omitted.

A radio frequency signal transmitted from a base station (not shown) is received by an antenna 401 and input to a receiving circuit 403 via an antenna duplexer 402. Receiving circuit 403 converts the frequency of the received signal to an intermediate frequency, and then demodulates the signal addressed to itself, and outputs the demodulated result to control unit 404 and a subsequent signal processing unit (not shown). The signal processing unit performs a decoding process and reproduces the audio information.

The control unit 404 controls various units of the mobile radio terminal device and performs various controls related to transmission and reception. The control unit 404 further includes, as new control functions, a delay profile creation unit 404a, a delay profile change monitoring unit 404b, and a moving speed determination unit 40.
4c.

The delay profile creation means 404a monitors the demodulation result of the reception circuit 403, detects a plurality of signals addressed to the own device arriving through various paths, creates a delay profile, and It is recorded in the delay profile storage area 405a.

The delay profile fluctuation monitoring means 404b
Detects a variation in delay time difference between paths based on the delay profile recorded in the delay profile storage area 405a.

The moving speed judging means 404c obtains the moving speed of its own device based on the fluctuation of the delay time difference between the paths detected by the delay profile fluctuation monitoring means 404b. The storage unit 405 includes an area for storing the control program of the mobile wireless terminal device, and additionally includes a delay profile storage area 405a. The delay profile storage area 405a is an area for storing the delay profile created by the delay profile creation unit 404a.

Next, the operation of detecting the moving speed of the mobile radio terminal having the above configuration will be described below. Here, as shown in FIG. 10, a case where mobile radio terminal apparatus PS receives a signal from a base station, a direct wave (path 1) and a reflected wave (path 2) by reflector C such as a building. explain.

First, in a state where the mobile radio terminal PS is at the position Pa, the receiving circuit 403 receives signals from the paths 1a and 2a. Such a delay profile is created and recorded in the delay profile storage area 405a.

Thereafter, the mobile radio terminal PS moves to the position Pb.
Similarly, since the receiving circuit 403 receives signals from the path 1b and the path 2b, the delay profile as shown in FIG. 11B is created by the delay profile creating means 404a, and the delay profile storage area 4
05a.

On the other hand, the delay profile fluctuation monitoring means 40
4b compares the delay time difference dt1 between the paths when the mobile radio terminal PS is at the position Pa and the delay time difference dt2 between the paths when the mobile radio terminal PS is at the position Pb.
The difference between dt2, that is, the fluctuation of the delay time difference is detected.

On the other hand, the moving speed determining means 404c
Calculates the moving speed of the own device based on the fluctuation of the delay time difference between the paths detected by the delay profile fluctuation monitoring means 404b.

As described above, in the mobile radio terminal having the above configuration, a delay profile is created from the multipath components of the signal from one base station, and the mobile terminal moves based on the fluctuation of the delay time difference between the paths. I try to find the speed.

Therefore, according to the mobile radio terminal having the above-described configuration, the moving speed of the mobile terminal can be obtained from the signal received from the base station without using an accelerometer or a gyro conventionally used for detecting the moving speed. be able to.

The present invention is not limited to the above embodiment. For example, according to the moving speed of the mobile wireless terminal device obtained as described above, the communication finger (second
The number of operations 303a, 303b, 303c) described in the above embodiment may be controlled, a threshold value for triggering a handover, a packet length during packet communication, or the like may be controlled.

For example, when moving at high speed, increasing the number of operating communication fingers and raising the threshold for handover compensates for fluctuations in the received electric field strength due to fading. In the case of packet communication, the packet length can be reduced by shortening the packet length. Data communication can be performed.

On the other hand, when moving at a low speed, reducing the number of operating communication fingers and lowering the threshold for handover can save power and save resources. In the case of packet communication, the packet length can be increased by increasing the packet length. Data communication can be performed.

In the above-described embodiment, the numerical data corresponding to the cell size of the movement destination is read and cumulatively added. However, the numerical data corresponding to the cell size of the movement source is read and cumulatively added. You may. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0083]

As described above, according to the present invention, the frequency of occurrence of handover for each mobile radio terminal device, the size of the radio zone of the base station device to which the mobile terminal device moves, the base station device in the mobile radio terminal device, and the like. The moving speed of the mobile wireless terminal device is determined based on the fluctuation of the intensity of the received signal from the mobile terminal.

Therefore, according to the present invention, there is provided a mobile radio communication system capable of obtaining a moving speed without installing an accelerometer, a gyro or the like conventionally used for detecting a moving speed in a mobile radio terminal device. A moving speed detection method can be provided.

Further, according to the present invention, a radio frequency signal arriving from a base station apparatus via a plurality of paths is received by a plurality of receiving means, based on the intensity fluctuation of the signal whose intensity fluctuation is the most intense. , The moving speed of the mobile radio terminal device is determined.

Therefore, according to the present invention, without using an accelerometer, a gyro, or the like conventionally used for detecting a moving speed, it is possible to more accurately detect its own device based on a received signal of a path closest to the moving direction. It is possible to provide a mobile wireless terminal device and a moving speed detecting method capable of determining a moving speed.

Further, the moving speed of the mobile radio terminal device is obtained from the base station device based on the fluctuation of the delay time difference between a plurality of radio frequency signals arriving via a plurality of routes.

Therefore, according to the present invention, the moving speed of the mobile radio terminal device is obtained based on the reception signal from the base station device without using an accelerometer or a gyro which is conventionally used for detecting the moving speed. And a moving speed detecting method.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of a mobile radio communication system according to a first embodiment of the present invention.

FIG. 2 is a circuit block diagram showing a configuration of a mobile radio terminal device of the mobile radio communication system shown in FIG.

FIG. 3 is a diagram for explaining a relationship between a reception electric field strength detection level of the mobile wireless terminal device shown in FIG.

FIG. 4 is a diagram showing an example of a criterion for determining a moving speed of a mobile terminal in the mobile radio communication system shown in FIG.

FIG. 5 is a circuit block diagram showing a configuration of a mobile wireless terminal device according to a second embodiment of the present invention.

FIG. 6 is a diagram for explaining a multipath signal arriving at the mobile wireless terminal device shown in FIG. 5;

FIG. 7 is a diagram showing a delay profile in the mobile wireless terminal device shown in FIG. 5;

FIG. 8 is a diagram showing a change in the received electric field strength of the multipath shown in FIG. 6;

FIG. 9 is a circuit block diagram showing a configuration of a mobile wireless terminal device according to a third embodiment of the present invention.

FIG. 10 is a diagram for explaining a multipath signal arriving at the mobile wireless terminal device shown in FIG. 9;

FIG. 11 is a diagram for explaining transition of a delay profile in the mobile wireless terminal device shown in FIG. 9;

[Explanation of symbols]

 A, B, C ... reflectors BS1, BS2, BS3 ... base station CS ... control station PS ... mobile radio terminal equipment 101, 301, 401 ... antenna 102 ... radio section 103 ... signal processing section 104 ... speaker 105 ... microphone 110, 200, 305, 404 control unit 110a electric field strength detection means 200a handover monitoring means 200b electric field strength fluctuation monitoring means 200c moving speed determination means 210, 405 storage unit 210a cell size storage area 210b handover information storage area 210c: electric field intensity fluctuation information storage areas 302, 402: antenna duplexers 303a, 303b, 303c, 403: receiving circuit 304: synthesizing circuit 305a: electric field intensity fluctuation detecting means 305b: moving speed determining means 404a: delay profile generating means 404b ... Late Profile change monitoring unit 404c ... moving speed determining unit 405a ... delay profile storage area

Claims (12)

[Claims] 1. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices are formed. A control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed, a handover monitoring means for obtaining a frequency of occurrence of handover for each of the mobile radio terminal devices, A zone size storage unit for storing the size of each wireless zone of the plurality of base station devices; and a zone for obtaining the size of the wireless zone of the destination base station device from the zone size storage unit when handover occurs. Size detecting means, and detecting the variation of the strength of the received signal from the base station device in the mobile radio terminal device, Intensity fluctuation monitoring means to be obtained, the occurrence frequency of handover obtained by the handover monitoring means, the size of the wireless zone obtained by the zone size detection means, and the intensity fluctuation of the received signal obtained by the intensity fluctuation monitoring means A moving speed detecting means for obtaining a moving speed of the mobile radio terminal device based on the moving speed. 2. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices are formed. A control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed, a handover monitoring means for obtaining a frequency of occurrence of handover for each of the mobile radio terminal devices, A zone size storage unit for storing the size of each wireless zone of the plurality of base station devices; and a zone for obtaining the size of the wireless zone of the destination base station device from the zone size storage unit when handover occurs. Size detection means, the frequency of handover occurrence determined by the handover monitoring means, and the zone size detection means Based on the size of radio zone, the mobile radio communication system characterized by comprising a moving speed detecting means for determining a moving speed of the mobile radio terminal device. 3. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. A mobile station including a control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed, a handover monitoring means for obtaining a frequency of occurrence of handover for each of the mobile radio terminal devices, A power fluctuation monitoring means for obtaining, for each of the mobile radio terminal apparatuses, a fluctuation in the strength of a received signal from the base station apparatus in the mobile radio terminal apparatus; a handover occurrence frequency obtained by the handover monitoring means; Moving speed detecting means for calculating the moving speed of the mobile radio terminal device based on the received signal strength fluctuation obtained by the means. A mobile radio communication system, comprising: 4. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. And a control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed. A zone size storage for storing a size of each radio zone of the plurality of base station devices. Means, when a handover occurs, a zone size detecting means for obtaining a size of a wireless zone of a destination base station apparatus from the zone size storing means, and a reception signal from the base station apparatus in the mobile radio terminal apparatus. Intensity fluctuation monitoring means for determining the intensity fluctuation of each mobile radio terminal device, and the size of the wireless zone obtained by the zone size detection means , On the basis of the strength of the received signal change and determined by the intensity change monitoring means, the mobile radio communication system characterized by comprising a moving speed detecting means for determining a moving speed of the mobile radio terminal device. 5. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. A control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed, a handover monitoring means for obtaining a frequency of occurrence of handover for each of the mobile radio terminal devices, A mobile radio communication system comprising: a moving speed detecting unit that obtains a moving speed of the mobile radio terminal device based on a handover occurrence frequency obtained by a handover monitoring unit. 6. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. And a control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed. A zone size storage for storing a size of each radio zone of the plurality of base station devices. Means, when a handover occurs, the size of the wireless zone of the destination base station apparatus, the zone size detecting means for obtaining from the zone size storing means, and the size of the wireless zone obtained by the zone size detecting means And a moving speed detecting means for obtaining a moving speed of the mobile radio terminal device based on the mobile communication system. 7. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. And a control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed.In the mobile radio communication system, the fluctuation of the strength of a signal received from a base station device in the mobile radio terminal device is Strength fluctuation monitoring means for each mobile radio terminal device; and movement speed detection means for calculating the moving speed of the mobile radio terminal device based on the strength fluctuation of the received signal obtained by the intensity fluctuation monitoring device. A mobile radio communication system characterized by the above-mentioned. 8. A mobile radio communication device that communicates with a base station device connectable to a public network through a radio communication line, wherein a plurality of radio frequency signals arriving from the base station device via a plurality of paths are received. Receiving means; an intensity fluctuation detecting means for obtaining an intensity fluctuation of a signal whose intensity fluctuation is the most intense among the signals received by the plurality of receiving means; A mobile radio communication device comprising: a moving speed detecting means for obtaining a moving speed of the device. 9. A mobile radio communication device that communicates with a base station device connectable to a public network through a radio communication line, wherein a delay profile of a plurality of radio frequency signals arriving via a plurality of paths from the base station device is determined. Delay profile creating means for determining, delay profile variation monitoring means for determining variation in delay time difference between a plurality of radio frequency signals arriving via the plurality of paths, based on the delay profile determined by the delay profile creating means; A mobile radio communication device comprising: a moving speed detecting unit that obtains a moving speed of the own device based on a fluctuation of a delay time difference between a plurality of radio frequency signals obtained by a profile fluctuation monitoring unit. 10. A plurality of mobile wireless terminal devices, a plurality of base station devices connected to the mobile wireless terminal device via a wireless communication line and connectable to a public network, and each of the plurality of base station devices is formed. And a control station device for performing handover control when the mobile radio terminal device moves between radio zones to be performed. A method for detecting a moving speed of a mobile radio terminal device used in a mobile radio communication system, comprising: A first step of determining for each of the mobile radio terminal devices, when a handover occurs, the size of the radio zone of the destination base station device and the size of each radio zone of the plurality of base station devices. A second step of obtaining from a zone size storage means for storing, and a variation in the strength of a signal received from a base station device in the mobile radio terminal device, The third step, the frequency of handover occurrence determined in the first step, the size of the wireless zone determined in the second step, and the third step.
And a fourth step of obtaining the moving speed of the mobile radio terminal device based on the received signal strength fluctuation obtained in the step (b). 11. A moving speed detecting method for a mobile radio communication device that communicates with a base station device connectable to a public network through a radio communication line, comprising: a radio frequency arriving via a plurality of routes from the base station device. A first step of receiving the signals, a second step of obtaining the intensity fluctuation of the signal whose intensity fluctuation is the most intense among the signals received in the first step, and a second step of obtaining the intensity fluctuation of the signal received in the first step. A third step of obtaining a moving speed of the mobile wireless terminal device based on the intensity fluctuation. 12. A method for detecting a moving speed of a mobile radio communication device that communicates with a base station device connectable to a public network through a radio communication line, comprising: a plurality of mobile stations arriving via a plurality of routes from the base station device. A first step of obtaining a delay profile of the radio frequency signal; and a delay profile obtained in the first step.
A second step of obtaining a change in the delay time difference between the plurality of radio frequency signals arriving via the plurality of paths; and moving based on the change in the delay time difference between the plurality of radio frequency signals obtained in the second step. A third step of obtaining a moving speed of the wireless terminal device.