JPH02222330A - Mobile positioning system using mobile communication - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mobile positioning system using mobile communication,
In particular, it is an indispensable system for controlling and guiding mobile objects such as automobiles and ships that receive mobile communication services.

[Conventional technology]

In general, there are two types of position measurement systems for moving objects: those that utilize external support equipment and those that use internal sensors to measure independently.The following are known as the main ones. The former methods that use external support equipment include electromagnetic induction method, light wave guidance method, landmark method, radio wave lighthouse method, and beacon method. Examples of the latter independent measurement using internal sensors include the direction/distance method and the inertial navigation method.

Among the above, technologies comparable to the present invention, ie, systems for controlling and guiding mobile bodies receiving mobile communication services, include the radio lighthouse system and the beacon system.

[Problem to be solved by the invention]

In the former radio lighthouse method, highly accurate position measurement can be performed. However, it is necessary to equip each mobile object with a measurement communication device, which makes the whole system complicated and
The disadvantage is that it becomes an expensive system. The latter beacon method has the disadvantage that highly accurate positioning cannot be performed unless the number of terrestrial beacons is increased.

The present invention focuses on the above-mentioned conventional problems, and provides a system for controlling and guiding mobile bodies receiving mobile communication services.
The purpose of the present invention is to provide a system that can measure the position of a moving body with high precision using only a simple ground device, without requiring as much equipment as possible on the side of the moving body.

[Means to solve the problem]

In order to achieve the above object, a mobile object positioning system using mobile communication according to the present invention will be described with reference to FIG. In the communication system, the mobile body 13 is equipped with a communication means 13a for receiving and transmitting radio waves with the ground station 13, and the ground station 13 is equipped with a reference time oscillation means 12b and a communication means 13a for receiving and transmitting radio waves with the ground station 13. time comparison means 12d for detecting the arrival time difference of the radio waves from the reception time of the radio waves from the means 13a and the reference time, and at least one of these ground stations 12 detects The configuration is such that the central control station 11 includes a calculation means 11d that calculates the position of the moving body 13 from the arrival time difference.

[Effect]

The principle of this configuration will be explained below with reference to FIG.

As shown in the figure, the coordinate system (
Xi, Yi), a plurality of known fixed points (ground station 12) A(Xi, Yl), B (X2, Y2
) , ... (Xn, Yn) and a moving point (the moving body 13) M (Xm, Ym) whose position is unknown. Each fixed point A, -B, . . . is equipped with a highly accurate clock (reference time oscillation means 12b). The same radio wave transmitted from the moving point M is received at each fixed point A, B, . That is, from this time difference, the radio wave propagation time difference from the moving point M to each of the fixed points A, B, .

〔Example〕

Embodiments of the present invention are shown in FIGS. 1, 3, and 4,
This will be explained below. FIG. 1 is a diagram showing an embodiment in which the present invention is applied to the positioning of a mobile vehicle receiving MCA (multichannel access) service.
3 is a moving vehicle (hereinafter referred to as moving vehicle 13), and the ground station 12 is composed of one central control station 11 and a plurality of other command stations 12. The mobile vehicle 13 is equipped with a communication means 13a for receiving and transmitting radio waves with the command station 12,
It communicates with each command station 12 via a central control station 11.

Communication between the central control station 11, the command station 12, and the moving vehicle 13 is performed via a wireless line using fixed control signals consisting of pid synchronization, frame synchronization, and data. The calculation configuration of the ground station 12 is as shown in the block diagram of FIG.
This is as shown in the block diagram in the figure. In Figure 3...
The central I control station 11 includes a control signal receiving section 11a, a reference clock 11b, a time comparison section 11c, and a positioning calculation section Ifd. The positioning calculation section 11d calculates the position of the moving vehicle 13 based on the data from the time comparison section 11e. The IC is an interpolation communication unit and communicates with other stations. On the other hand, in FIG. 4, the command station 12 includes a control signal receiver 812a, a reference clock 12b, a time comparison section 12c, and a different pole communication section 12e.

The time comparison data calculated by these are sent to the central control station 1.
1 or used for communication with a moving vehicle 13.

[Effects of the Invention] As explained above, the mobile body positioning system using mobile communication according to the present invention can be used for controlling and guiding a mobile body receiving mobile communication services, without installing any equipment on the mobile body side as much as possible. The position of a moving object can be measured simply, easily, and with high precision.

[Brief explanation of the drawing]

Figure 1: A diagram showing an embodiment of a mobile positioning system using mobile communications according to the present invention. Figure 2: A diagram showing the principle of a mobile positioning system using mobile communications according to the present invention. Calculation at the central control station. Block diagram of the calculation at the command station Figure 3, Figure 4, 1, d2, bd3, a, central control station, calculation means, ground station, reference time oscillation means, time comparison means, Mobile objects/communication means Figure 2

Claims (1)

[Claims] In a communication system consisting of a mobile body 13 and a plurality of ground stations 12, the mobile body 13 is equipped with a communication means 13a for receiving and transmitting radio waves with the ground station 13, and the other ground station 1
3 comprises a reference time oscillation means 12b and a time comparison means 12d for detecting the difference in the arrival time of the radio wave from the reception time of the radio wave from the communication means 13a and the reference time, and , at least one is a central control station 11 equipped with calculation means 11d for calculating the position of the mobile object 13 from the arrival time difference detected by these ground stations, a mobile object positioning system using mobile communication. .