JPS60196024A - Monitor method for car movement - Google Patents

Abstract

PURPOSE:To limit a specific point and to transmit by wire the information on only a car to be registered to a base station, by transmitting a signal for car to be registered with a weak radio wave to register a request of a mobile station for delivery of a car to the base station, receiving the weak radio wave by a weak radio wave receiver and transmitting the reception information on the weak radio wave to the base station by wire. CONSTITUTION:When a mobile station 1 enters specific point P1 and wants to receive a registered car delivery command, a registered car delivery request switch 20 is pushed. Thus a registered car delivery signal containing a register code is delivered from an antenna 19 via a weak radio wave transmitter 18 and then received by a weak radio wave receiver 22 via an antenna 23. Then this signal is sent to a base station 2 via public lines 7a, 7b.... The station 2 processes the received signal through a wire signal processing part 8 and records it to a recording part 11 in the order of reception. At the same time, this signal is displayed at a CRT display part 9. Then the station 2 gives a car delivery command to the station 1 by radio in the order of registration.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention collects data on the dynamics (such as empty cars, one rental trip, closed stations, emergency, and premium charges) of mobile stations (wireless taxis, etc.) by polling from a base station. In a vehicle dynamics monitoring method that collects and displays on the display device of the base station and manages such as issuing vehicle dispatch orders from the base station based on the collected information, general In addition to the dynamic monitoring method (distributed transmission method described later), the present invention relates to a vehicle dynamic monitoring method in which signals are transmitted to a base station only from vehicles that wish to be registered via wires.

[Prior Art and Problems] Conventionally, as vehicle dynamic monitoring methods particularly targeting taxis, (1) a semi-automatic method (manual setting method) and (2) a distributed transmission method are known.

(1) As shown in FIG. 2, the business area of semi-automatic taxis is divided into several to several tens of blocks (A) CB), etc., and numbers are assigned to each block. When a customer orders a ride, the base station presses the corresponding district button. Then, a district-specific polling signal is emitted.

This signal is received by all mobile stations (taxi radios), but among them, if the driver has pressed the button for that area, it matches the polling signal, and the car is empty, the mobile station will send the taxi to the taxi. The number calls. The base station receives this information, displays it, and issues a dispatch command from there.

(2) Distributed transmission method As above, the business area is divided as shown in Figure 2, and a sign post (a) (b) - (small transmission machine). When vehicle (1) enters point (A1) of district (A) from outside the business area, the position group signal from the nearest sign post (a) is memorized, and even if it passes point (A2), it will continue to the district. (
Hold the position group signal of A). Next, when moving to point (B1) in area (B) of another sign post (b), the memory of the position group signal of the previous sign post (a) is erased and the position group of the new sign post (b) is erased. Memorize the signal. In this way, each time the vehicle (1) moves, the position group signals of the nearest sign posts (a), (b), etc. are stored in the vehicle (1). When a vehicle allocation order is received, the base station sends out a polling signal specifying the area, and the vehicles (1) in the area send back the vehicle number and dynamic data (vacant, rental, forwarding, etc.).

The base station receives this information, displays it, and issues a dispatch order from there. When the vehicle leaves the business area from point (A2), the memorized position group signal will be changed after a certain period of time (for example, minutes).
(C1) Erase at point.

As mentioned above, when you specify the relevant area and click the ball link, vehicles in the relevant area will return their vehicle numbers and dynamic data.
There are many vehicles in the area.

If these respond all at once, signal collision will occur, and the base station will not be able to obtain correct information.

As a countermeasure to this problem, as shown in Figure 1, all vehicles were
By dividing each unit into groups and setting time slots to which response times (t, o ~ 0, L, ~ 2, etc.) with unique time differences are assigned sequentially to each group, and when a polling signal is received, these A method of preventing signal collision (interference) due to simultaneous calling by responding in a time slot of 11 is normally used.

However, during times of congestion, there may be multiple groups of vehicles in the same area, and if they make calls at the same time by polling the base station, interference will occur, which will reduce the rate of dynamic data collection. There was a problem.

The applicant has proposed various polling methods to solve the above problems. However, in the distributed transmission method where areas are registered using signpost transmitters, the limit for data transmission and reception in conjunction with telephone calls is 5 mobile stations per frequency.
It is believed to be around 00. It takes about 0.4 seconds to send and receive data to and from one base station, and for 500 base stations it takes about 20 seconds.
This is because a time of 0 seconds, that is, a little over 3 minutes, is required.

In addition, for vehicle movement monitoring in large cities, only the distributed transmission method is permitted, which limits the ability to send and receive data, creating many obstacles to effective data collection.

[Object of the Invention] An object of the present invention is to transmit information only about vehicles that wish to be registered to a base station by wire, limited to a specific point.

[Summary of the Invention] A method in which a sign post emits a location signal for each district, and the base station collects dynamic data of mobile stations in the district by district-designated polling from a base station. A vehicle signal to register the desired vehicle dispatch to the base station is emitted as a weak radio wave, the weak radio wave is received by a weak radio wave receiver installed at a specific point, and the received information is transmitted by wire. The information is then transmitted to the base station. A specific point is limited to a narrow place where vehicles are particularly concentrated. Further, the weak radio wave receiver and the base station are connected using a telephone line.

[Embodiment of the Invention] An embodiment of the method according to the present invention will be described with reference to the drawings. In Fig. 3, (2) is a base station, and this base station (2) is connected to a central controller (3), a communication controller (4), a transmitter/receiver (
It is coupled to the transmitting/receiving antenna (6) via 5), and
The central control unit (3) is connected to public company lines (7a) such as telephone lines.
) (7b)... is coupled to the wired signal processing unit (8) of the input signal, and furthermore, the CRT display unit (9),
It is configured by combining a printer (10), a recording section (11), a command section (12), etc.

Next, (1) is a mobile station such as a taxi, and this mobile station (1) is the antenna (a) of the sign post (a) (b)... installed in each area as shown in Figure 2. It is equipped with an antenna (14) and a Signbost receiver (15) for receiving a position group signal from a base station (13), and also receives a polling command signal from a base station (2), and also receives a polling command signal from a mobile station (1).
An antenna (16) that transmits response signals and data signals from
) and a transceiver (17). The mobile station (1) of the present invention further includes a weak radio wave transmitter (18) and its antenna (19), and the weak radio wave transmitter (18) is coupled to a registered vehicle dispatch request switch (20).

Furthermore, a central control unit (21) for processing information such as movement, car number, etc. is coupled to the transceiver (17) and the weak radio wave transmitter (18). This weak radio wave transmitter (1
8) reduce the sensitivity and narrow the points, e.g. Pl
, P2, . . . to emit a signal. In addition, within the area covered by the signposts (a), (b), etc., the specific points (PL) (P2) are located in areas where vehicles are particularly concentrated, such as in front of a station or in a downtown area. A weak radio wave receiver (22) and an antenna (23) that are unrelated to the distributed transmission system are installed at the
) are connected to the base station (2) via public company lines (7a), (7b), etc., such as telephone lines.

Next, the present invention will be explained in detail.

As already explained, polling and response are carried out wirelessly between the base station (2) and the mobile station (1).

When the -1 mobile station (1) enters the specific point (Pl) and wishes to receive a registered vehicle dispatch command, it presses the registered vehicle dispatch request switch (20). Then, a weak radio wave transmitter (1
8), a registration desired vehicle signal with a registration code attached is emitted from the antenna (19). This signal is received by a weak radio wave receiver (22) via an antenna (23), and sent to the base station (2) via public company lines (7a), (7b), and so on. In the base station (2), the signal is processed by a wired signal processing unit (8), and recorded in the recording unit (]1) in the order of reception.
and is displayed on the CRT display section (9). And the base station (
In 2), a vehicle allocation command is given to the mobile station (1) by radio based on the registered order.

[Effects of the Invention] As described above, the present invention transmits information from a mobile station to a base station by wire at a specific point, so it solves the problem that the distributed transmission method was generally thought to have about 500 mobile stations per frequency. By compensating for these points, even if there are more mobile stations, valid information can be collected correctly. It is particularly effective when used in areas where most vehicles are concentrated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of unique time slots, FIG. 2 is an explanatory diagram of a distributed transmission system, and FIG. 3 is a block diagram of an apparatus for implementing the method of the present invention. (]) = mobile station, (2) base station, (7a) (7b)
--Public corporation line, (18)...Weak radio wave transmitter, (20)...
...Registered vehicle dispatch request switch, (22)...Weak radio wave receiver. Applicant: General Co., Ltd.

Claims (3)

[Claims] (1) A method in which a signpost emits a location signal for each district, and the base station collects dynamic data of mobile stations in the district by district-specific polling from the base station, which is registered from the mobile station. A vehicle characterized in that a desired vehicle signal is emitted as a weak radio wave, the weak radio wave is received by a weak radio wave receiver installed at a specific point, and the received information is transmitted to a base station by wire. Dynamic monitoring method. (2) The vehicle dynamic monitoring method according to claim 1, wherein the specific point is a limited narrow place within a set area where vehicles are concentrated. (3) A vehicle dynamic monitoring method according to claim 1 or 2, wherein the weak radio wave receiver and the base station are connected via a telephone line.