JP2001307280A - Position detection and management method of position- depended mobile communication system and portable machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify a portable machine's current position and predict the arrival time to a facility using the position detecting means or arithmetic means such as GPS(global positioning system) on which is installed on the portable machine and send it to a facility with accuracy. SOLUTION: This invention is provided with a process to receive and store the position of the facility from a center, a process to detect the current position of the portable machine using a position detection means, a process to successively operate and store the distance difference between the current position of the detected portable machine and the facility, a process to make the aggregation of stored data gathering the distance difference information in fixed periods, a process to predict the arrival time of the facility and current position of the portable machine based on the aggregation of the stored data, a process to make the arrival signal based on the predicted arrival time and a process to send the arrival signal to the center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position-dependent mobile communication system and a method for detecting and managing the position of a portable device using the system. For example, a GP mounted on a portable device
This is to provide a means for accurately detecting the position of a portable device or arrival at a facility using a position detecting device such as S (Global Positioning System).

[0002]

2. Description of the Related Art In a conventional system using GPS, a method of estimating a position from GPS data at one measurement point has been used.

In a conventional system using GPS, services available to a user include SA (Selective Availab).
ility), and the accuracy to be corrected is about 100 m. For this reason, in order to perform positioning with higher accuracy, for example, “DGPS and GPS / GLONASS single positioning in a mobile object” (Namie,
Yasuda, The 99th Lecture Meeting of the Nautical Society of Japan (November 4, 1998). (http // www.cbt.go.jp), the signal sent from the satellite is received by the reference station, and after detecting the positioning error, the correction data is transmitted by FM multiplex broadcasting, and this is DGPS. There is a method of guaranteeing the SA by receiving it at the receiver. According to this method, improvement in accuracy can be expected,
There has been a problem that instantaneous measurement errors occur due to shielding of a satellite by buildings such as buildings around the portable device and positioning effects due to multipath, and it is difficult to constantly specify the current position.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and uses a position detecting means such as a GPS mounted on a portable device and an arithmetic means. It is therefore an object of the present invention to accurately specify the current position of the portable device and specify the arrival at the facility.

[0005]

In order to solve the above problems, a position-dependent mobile communication system according to the present invention comprises at least one or more portable devices and a center,
The center includes a facility information database that stores the location of the facility, and a communication device that transmits the location of the facility to the portable device. The portable device stores the location of the facility received from the center. Storage means, a position detecting means for detecting the current position of the portable device, and a storage means for sequentially calculating and storing the distance difference between the current position of the portable device and the location of the facility detected by the position detecting means, Calculating means for collecting the distance difference information stored in the storage means for a certain period of time to create a set of stored data, and predicting the current position of the portable device and the arrival time at the facility based on the set of stored data; Creating an arrival signal from the predicted arrival time,
An editing means for transmitting the false arrival signal to the center is provided. As a result, since the current position of the portable device is continuously detected and managed, the instantaneous uncertainty associated with multipath can be eliminated, and the arrival of the portable device at a predetermined facility can be accurately and efficiently detected at the center. You can do it. Also, the current position of the portable device can be detected with high accuracy.

In order to solve the above-mentioned problems, a method for detecting and managing the current position of a portable device according to the present invention comprises the steps of acquiring and storing the position of a facility, and the current position of the portable device using position detecting means. Detecting, and sequentially calculating and storing the distance difference between the detected current position of the portable device and the position of the facility, and creating a set of storage data by collecting the stored distance difference information for a certain period of time. Performing the step of predicting the current position of the portable device and the time of arrival at the facility based on the set of stored data, generating an arrival signal based on the predicted time of arrival, and transmitting the arrival signal to the center. The method includes the step of transmitting. The present invention corresponds to the method for detecting and managing the position of a portable device using the position-dependent mobile communication system according to the present invention.

In the above-described portable device position detecting and managing method, a GPS receiver and a DGPS are used as position detecting means.
(Differential Global Positioning
System) using a receiver, using the latitude and longitude of the location of the facility as the location of the facility, and using the latitude and longitude of the location of the mobile device detected by the GPS receiver and corrected by DGPS as the current location of the mobile device. I do. Since the latitude and longitude of the position of the portable device from the GPS receiver corrected by the DGPS are used as the current position of the portable device, the current position of the portable device and the arrival at the facility can be accurately performed.

In the method for detecting and managing the current position of the portable device, the step of predicting the current position of the portable device and the time of arrival at the facility based on the set of stored data includes the step of predicting the stored data (position coordinates and time). The present invention is characterized in that the current position of the portable device is estimated using a regression curve of a set, for example, a least-mean-square line, and the arrival time at a facility is estimated by extrapolation of the regression curve, for example, a least-mean-square line. The change in the current position of the portable device can be estimated automatically and with high accuracy by using a simple least-mean-square arithmetic expression.

In the above-described portable device current position detection / management method, the facility position is estimated from the extrapolation of the straight line having the largest time variation among the least mean square straight lines of the set of stored data. A new current position is estimated from the least mean square line. Thus, when the moving route of the portable device moves at random with respect to the destination, it is easy to determine whether or not the vehicle is proceeding correctly to the destination based on the distance difference from the destination.

[0010] In the above-described method for detecting and managing the current position of the portable device, the arrival signal is generated when the distance difference between the estimated current position of the portable device and the estimated facility position becomes equal to or smaller than a predetermined value. It is characterized by doing. It is possible to quickly grasp that the portable device is in the vicinity of the facility position, and thereafter, fine guidance can be provided.

[0011]

1 to 12 show an example of an embodiment of the present invention. FIG. 1 is a schematic configuration diagram of a system, and FIG. 2 is a schematic configuration diagram of a portable device. FIG. 3 is an example of data stored in the portable device, and FIG. 4 is an explanatory diagram of prediction of a current position and a facility position of the portable device. FIG. 5 is a schematic configuration diagram of the center. FIG. 6 is a flowchart showing the processing procedure, and FIGS. 7 to 9 are flowcharts for explaining each step of FIG.

In FIG. 1, reference numeral 10 denotes a position-dependent mobile communication system. The system 10 is roughly configured to include the following. (1) Portable device 100 (2) Wireless access 200 (3) Center 300 (4) Facility 400

As the radio access 200, a radio base station for mobile communication or the like is applicable. The center is a facility operation establishment or the like. The facilities correspond to distribution bases, parking lots, and the like.

As shown in FIG. 2, for example, the following hardware is mounted on the portable device 100.
00 is a wireless access 200
Used to connect to the center via. (1) Control unit 110 (2) Position detecting means 120 (at least GPS, DGP
(Transceiver capable of transmitting / receiving data to / from position detecting means such as S) (3) Wireless communication means 130

The portable device 100 may be a vehicle-mounted device mounted on a car. Note that the number of portable devices 100 is not limited to one, and a plurality of portable devices may be used. However, in the present embodiment, one portable device 100 will be described as an example to simplify the description.

The control unit 110 functions as the following means by reading the stored program, as shown in FIG. (1) Storage means 111 (2) Accumulation means 112 (3) Calculation means 113 (4) Editing means 114 The means of the control unit 110 are as described in (1) to (4) above.
It is not limited to.

The storage means 111 is for storing information such as the location of the facility 400, and stores the following data. (1) Center information (2) Facility information

As the center information, for example, a telephone number of the center is stored.

As the facility information, a facility ID, a location of the facility, and the like are stored. The coordinates of the location of the facility are referred to as facility coordinates. In addition, the longitude and latitude on the map are used as the facility coordinates.

The facility information may be obtained from the facility information database 321 of the center 300 or may be updated. The present invention is not limited to this, and it may be distributed to members using hardware such as a CDROM. In this case, the facility information is stored in CDROM
From the mobile device to obtain. In some cases, the information is manually input to the portable device.

The portable device 100 stores the portable device 10 detected by the position detecting device 120 as current position information of the portable device in the position detecting means 120 (or may be stored in the storage device).
The coordinates and the like of the current position (location) of 0 are stored.

For example, as shown in FIG. 3, the storage means 112 outputs the latitude and longitude of the current position of the portable device (East longitude, North latitude) detected by GPS and corrected by DGPS, measurement time,
The difference between the latitude and longitude (longitude difference and latitude difference) from the facility position and the distance difference corresponding to the latitude and longitude difference are sequentially calculated and stored.

As shown in FIG. 4, for example, the calculating means 112 calculates distance difference information corresponding to the difference between the facility position stored in the storage means and the current position of the portable device detected by the position detecting device. A set of stored data is created by collecting for a certain period of time (sample section), and an operation is performed based on the set of stored data to predict the actual position of the portable device (indicated by the dotted line in FIG. 4) and the arrival time at the facility. . The horizontal axis in FIG. 4 indicates the measurement time, and the vertical axis indicates the distance difference between the latitude and longitude of the current position of the portable device and the latitude and longitude of the facility position detected by the GPS receiver and corrected by DGPS corresponding to the measurement time. The plot points in the figure indicate the distance difference corresponding to each measurement time. The sample interval corresponds to a time interval for calculating the distance difference, and the sample section corresponds to a range of distance difference data (a period during which the distance difference data is sampled) used when calculating a prediction straight line. The sample interval and the sample section are set in advance. FIG.
The dotted line indicates a regression curve calculated by removing, for example, singular points (points greatly deviating) from the set of plots. The intersection with the horizontal axis when the regression curve is extrapolated in FIG. 4 is the time when the distance difference becomes 0 (point A), and this time is determined as the time of arrival at the facility. A set of storage data is created by collecting the distance difference information stored in the storage means for a certain period of time, and the current position of the portable device and the arrival time at the facility are predicted based on the set of storage data.

The editing means 114 is for transmitting arrival information to the facility to the center 300 via the wireless communication means 130 and the wireless access 200. That is, the editing unit 114 creates an arrival signal at the facility based on the estimated value of the location of the facility and the estimated value of the current location of the portable device when the distance difference becomes zero. The data is transmitted to the center 300 via the 200.

It should be noted that the arrival signal is a value indicating the difference between the distance between the portable device and the facility specified in advance (eg, within a range of 10 m from the facility)
In the following case, an arrival signal may be created and transmitted to the center 300, or the portable device 100 and the facility 40
The data may be created in two stages, that is, when the distance difference from 0 becomes equal to or less than a predetermined value and when the distance difference becomes 0, and transmitted to the center 300. It is possible to quickly grasp that the portable device is in the vicinity of the facility position, and thereafter, fine guidance can be provided.

The position detecting means 120 is a portable device 100
For example, it has a transceiver capable of transmitting and receiving data to and from a position detection system including a GPS (global positioning system) receiving unit 121 and a DGPS receiving unit 122 for correcting the data.

The wireless communication means 130 includes, for example, PHS
(Personal handy phone system), mobile phone, MCA (abbreviation of multi-channel access, a kind of business wireless means) and the like are used.

In the embodiment of the present invention, the control unit 11
A case will be described in which the portable device 100 includes 0 and the position detection unit 120. However, the same function can be achieved when these are mounted as an adapter and connected to the portable device 100. In this case, the adapter is regarded as a part of the portable device 100 and should be interpreted as falling within the scope of the claims of the present invention.

The center 300 includes the following hardware, for example, as shown in FIG. (1) Wireless communication device A3 that communicates with wireless access 200
10 (2) Database 320 (3) Communication device B350 that communicates with facility 400

The facility information database 321 for storing facility information stores at least the following data. (1) Facility ID (2) Location of Facility The data in the facility information database 321 is not limited to the above (1) and (2).

The facility ID, facility location,
The owner, telephone number, and the like are stored.

The locations of the facilities correspond to entrances to distribution bases, parking lots and the like.

The communication device B 350 is connected to the facility 400 and is used for transmitting arrival information to the facility from the center to the facility 400.

Radio communication device A 310 and communication device B 35
As 0, for example, a personal computer communication terminal or the like connected to a router is used.

Next, the system 1 having the above configuration will be described.
0 will be described with reference to FIG. The processing procedure includes the following three steps as shown in FIG.

(1) First Step S100 In the first step S100, the facility location is downloaded from the center 300 to the portable device 100 via the wireless access device 200 as shown in FIG.

More specifically, as shown in FIG. 7, in step S101, the center 300 transmits the facility position to the portable device 100 and sets a timer (step S102).

The confirmation signal is received within the timing set by the center in step S104 (step S104).
104) Then, the timer is stopped and the processing ends.

The portable terminal sends the facility position signal to step S105.
If the facility location is received in step S106, the facility location is determined in step S106.
After the confirmation signal is transmitted to the center 300 in step 107 and the confirmation signal is transmitted to the center 300 in step 107, the processing is terminated.

If the confirmation signal cannot be received at the center within the timing, the flow returns to step S101 to repeat the processing (step S103).

The facility location can be obtained by inputting the facility location from the CDROM or manually into the portable device 100 instead of downloading the facility location from the center 300 to the portable device 100.

(2) Second Step S200 In the second step S200, as shown in FIG. 8, the operation of the portable device 100 while the portable device 100 is moving to the facility is shown.

While moving to the facility, the latitude and longitude of the facility are output from the storage means 111 (step S201), and at the same time, the latitude and longitude of the current position of the portable device are output from the position detection means 120 (step S202). 112 calculates and accumulates the data converted into the latitude and longitude difference of the two outputs and the distance difference corresponding thereto (step S203). Next, a timer is set to collect the distance difference information accumulated in the accumulation means 112 for a certain period of time to create a set of stored data (step S204). The timer is set so that data corresponding to the sample section can be obtained.

The storage means continues the operation of step S203 until the time expires (step S205).

The calculating means 113 detects the time-over and collects the distance difference data accumulated within the timing for a certain period of time to create a set of stored data, and performs a least mean square calculation based on the set of stored data to perform estimation. A straight line is created (Step S206).

The calculating means 213 estimates the facility position by extrapolating the estimated straight line, and when the value of the estimated straight line becomes 0, or when the distance difference between the portable device and the facility becomes less than a predetermined value. Estimate the arrival time more and monitor whether it becomes such. (Step S207). Further, the current position of the portable device is estimated based on the estimated straight line.

(3) Third Step S300 In the third step S300, as shown in FIG. 9, the arrival of the portable device at the facility is detected, and the wireless communication device A31 is detected.
0 is notified to the center 300. After receiving this signal, the center transmits an arrival signal to the facility via the communication device B305.

More specifically, the position of the facility estimated from the estimated straight line by the calculating means 113 is output (step S301), and the current position of the portable device estimated from the estimated straight line is output (step S302). Comparison and collation are performed (step S303). If the collation results match (the distance difference between the estimated current position of the portable device and the estimated facility position is 0)
), An editing unit 114 creates an arrival signal,
The information is transmitted to the center (step S305). When the distance difference becomes equal to or smaller than the predetermined range, a signal indicating that the mobile device has entered the designated area may be transmitted from the portable device to the center.

When the center receives the arrival signal from the portable device (step S306), the center transmits the arrival signal to the facility (step S307). Upon receiving the arrival signal (step S308), the facility performs an operation such as giving an instruction to the portable device based on this information.

When estimating the facility position and the arrival time and transmitting the arrival signal to the center, a plurality of least-square mean straight lines of the stored values of the data are prepared for different sample sections, and these least-square means are prepared. Of the straight lines, the facility position is estimated from the extrapolation of the straight line with the largest time variation, and when the distance from the facility position becomes less than a predetermined range, a signal indicating that the portable device has entered the designated area at the center is output from the portable device. By transmitting the information, when the moving route of the portable device moves at random with respect to the destination, it is easy to determine whether or not the vehicle is proceeding correctly to the destination based on the difference in distance from the destination.

[0051]

Since the present invention is configured as described above, it has the following effects.

According to the first and second aspects of the present invention, since the current position of the portable device is continuously detected and managed, the instantaneous uncertainty associated with multipath can be eliminated, and the portable device can be installed in a predetermined facility. Can be accurately and efficiently detected at the center. Also, the current position of the portable device can be detected with high accuracy.

According to the third aspect of the present invention, since the latitude and longitude of the position of the portable device from the GPS receiver corrected by DGPS are used as the current position of the portable device, the current position of the portable device is specified and the facility is specified. It is possible to arrive with high accuracy.

According to the fourth aspect of the invention, the change in the current position of the portable device can be automatically and highly accurately estimated by using a simple arithmetic expression of least mean square.

According to the fifth aspect of the present invention, when the moving route of the portable device moves at random with respect to the destination, it is determined whether or not the vehicle is proceeding correctly toward the destination due to a difference in distance from the destination. Can be easily determined.

According to the sixth aspect of the present invention, it is possible to recognize at an early stage that the portable device is near the facility position, and thereafter fine guidance can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a system according to the present invention.

FIG. 2 is a schematic explanatory diagram of a portable device according to the present invention.

FIG. 3 is an explanatory diagram of an example of data used in the present invention.

FIG. 4 is an explanatory diagram of position prediction according to the present invention.

FIG. 5 is a schematic explanatory view of a center according to the present invention.

FIG. 6 is a flowchart showing a processing procedure of the system according to the present invention.

FIG. 7 is a flowchart illustrating a process of “downloading facility location” in FIG. 6;

FIG. 8 is a flowchart illustrating a process of “moving to a facility” in FIG. 6;

FIG. 9 is a flowchart illustrating a process of “arrival for use” in FIG. 6;

[Explanation of symbols]

Reference Signs List 10 position-dependent mobile communication system 100 portable device 110 control unit 111 storage unit 112 storage unit 113 calculation unit 114 editing unit 120 position detection unit 121 GPS reception unit 122 DGP
S receiving unit 200 wireless access 300 center 310 wireless communication device A 320 database 321 facility information database 350 communication device B 400 facility

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Katsuzo Inaba 2-3-1, Otemachi, Chiyoda-ku, Tokyo F-term in Nippon Telegraph and Telephone Corporation (reference) 2F029 AA02 AB07 AC01 AC02 AC06 AC09 AC19 AC20 AD01 3E038 AA01 CA07 GA03 HA05 JB10 5H180 AA01 BB04 BB05 BB15 CC12 EE02 FF01 FF05 FF07 FF10 FF27

Claims (6)

[Claims] 1. A center comprising at least one or a plurality of portable devices and a center, wherein the center includes a facility information database that stores a location of a facility, and a communication device that transmits the location of the facility to the portable device. A storage unit for storing a position of the facility received from the center; a position detection unit for detecting a current position of the portable device; and a current position of the portable device detected by the position detection unit. A storage means for sequentially calculating and storing the distance difference between the position and the location of the facility, and a set of storage data created by collecting the distance difference information stored in the storage means for a certain period of time, based on the set of storage data Computing means for predicting the current position of the portable device and the arrival time at the facility, and editing means for creating an arrival signal from the predicted arrival time and transmitting the arrival signal to the center A position-dependent mobile communication system. 2. Obtaining and storing the location of the facility;
Detecting the current position of the portable device using the position detecting means, sequentially calculating a distance difference between the detected current position of the portable device and the position of the facility, and storing the distance difference information; Collecting a set of stored data by collecting the stored data for a certain period of time; predicting the current position of the portable device and the time of arrival at the facility based on the set of stored data; and arriving at a signal based on the predicted time of arrival. And transmitting the arrival signal to the center. 3. A GPS receiver and D as position detecting means.
Using a GPS (Differential Global Positioning System) receiver, the latitude and longitude of the location of the facility are used as the location of the facility, and the GPS is used as the current location of the portable device.
The method according to claim 2, wherein the latitude and longitude of the location of the portable device detected by the receiver and corrected by DGPS are used. 4. The step of predicting the current position of the portable device and the time of arrival at the facility based on the set of stored data includes regression curves of the set of stored data (position coordinates and time), for example, using a least-mean-square straight line. 4. The method according to claim 2, wherein a current position of the portable device is estimated, and an arrival time at a facility is estimated by extrapolation of the regression curve, for example, a least mean square line. 5. A facility position is estimated from an extrapolation of a line having the largest time variation among least mean square lines of a set of stored data, and a new current position of the portable device is estimated from the least mean square line. The method for detecting and managing a position of a portable device according to claim 4, wherein: 6. The method according to claim 2, wherein the arrival signal is generated when a difference between the estimated current position of the portable device and the estimated facility position becomes equal to or smaller than a predetermined value. The method for detecting and managing the position of the portable device described in the above.