JPH04185024A - Avm system - Google Patents

Abstract

PURPOSE:To reduce the reception station cost by dividing a region, where the condition, the position, or the like of a mobile station should be recognized, into plural blocks by the coverage area of each reception station and setting and overlapping respective coverage areas to gather information of the condition, the position, or the like of the mobile station in many blocks by a small number of distributed reception stations. CONSTITUTION:When a taxi business region is divided into blocks D, E, and F, blocks DE, EF, FD, and DEF of overlapping zones are set in overlapping parts of these blocks. When a taxi 6 in the business region exists in the block DE, condition information of the vacant vehicle number or the like of the taxi is originated and is received by a distributed reception station close to the taxi 6. That is, it is received by first and second distributed reception stations 1 and 2, which can receive it, and is transmitted to a radio car operation room 4 through a circuit 5. The same operation is performed for the other blocks, and information is gathered in white parts of blocks D, E, and F in the same manner as conventional.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an automatic V
The present invention relates to an AVM system that is used in the Vehicle Monitoring (Ehicle Monitoring) system and sets overlapping coverage areas of distributed receiving stations, considers the overlapping zones as one area, and allows a small number of distributed receiving stations to utilize a large number of areas.

[Conventional Example] Conventionally, this type of AVM system has adopted a distributed reception method, which has many advantages over semi-automatic methods and distributed transmission methods. This distributed reception type AVM system has the configuration shown in FIG. 3, for example, and the area (business area) is set into a plurality of blocks.

First to third distributed receiving stations 1, 2.3 are arranged approximately at the center of each block A, B, C, and these distributed receiving stations 1°2.3
and a base station (wireless dispatch room) 4 are connected by each line 5. Then, when the mobile station (for example, a taxi) 6 issues information on the situation (dynamic information on vehicles, empty cars, etc.), the received information is received by a distributed receiving station near the taxi 6, and this received information is transmitted to the line 5. The information is transmitted to the wireless dispatch room 4 via. This results in
The wireless dispatch room 4 collects information on the status of the taxi 6 based on the received information, and also collects information on the status and location of the taxi 6 via the usage line 5, and efficiently dispatches a taxi in response to a customer's request. becomes possible.

[Problems to be Solved by the Invention] However, in the AVM system using the distributed reception method described above, it is necessary to arrange distributed reception stations for each block and to connect these distributed reception stations and the base station with one line. Therefore, the running cost per receiving station is high, and if you try to collect mobile station status and location information for more blocks, many lines are required.
There was a problem in that the current network conditions made it impossible to install a sufficient number of receiving stations.

This invention was made in view of the above problems, and its purpose is to reduce the number of lines used, that is, reduce the number of receiving stations, reduce running costs, and moreover, to reduce the number of mobile stations in a block. An object of the present invention is to provide an AVM system that can collect location information.

[Means for Solving the Problems] In order to achieve the above object, the AVM system of the present invention sets overlapping areas that can be received by a plurality of M receiving stations, regards this overlapping zone as one area, and The status of the mobile station in the zone can be received by multiple distributed receiving stations, and the received status of the mobile station can be transmitted from each distributed receiving station to the base station, and the base station can receive the status of the mobile station. The gist is that when the mobile station receives status information from multiple distributed receiving stations, it is determined that the mobile station is in an overlapping area of multiple distributed receiving stations, and the status and location of the mobile station can be determined. .

[Function] With the above configuration, the area where the status and location of mobile stations are to be grasped is divided into multiple blocks depending on the coverage area of each distributed receiving station, but the coverage areas are set to overlap, and this overlap Zones are also set as independent blocks. Then, when a mobile station located in a block in the overlapping zone makes a call with information such as the relevant status, the call is received by multiple distributed receiving stations that are configured to overlap, and the mobile station's status is is transmitted to the base station via the line. Since the information of the mobile station is transmitted from multiple distributed receiving stations, the base station determines that the mobile station is located in the block of the overlapping zone using the lines used by those stations, and determines the status and location of the reception, etc. The information will be grasped.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In FIG. 1, the same parts and corresponding parts as in FIG. 3 are given the same reference numerals, and redundant explanation will be omitted.

In FIGS. 1 and 2, the receivable areas of the first to third distributed receiving stations 1, 2.3 are set to overlap,
For example, the taxi business area (area) is Block D, E,
F, and the other overlapping zones indicated by diagonal lines in the figure are blocks DE, EF, and FD.

It is set to DEF. Note that the receivable area of the first distributed receiving station l, the receivable area of the second distributed receiving station 2 is E, and the receivable area of the third distributed receiving station 3 is F.

Then, when the taxi 6 in the business area is in the block DE shown by diagonal lines in FIG. 2, the situation of the taxi 6 (
When you call information such as vacant car number).

This call is received at a distributed receiving station near the taxi-6. In this case, the information is received by the first and second distributed receiving stations 1 and 2 that can receive the information, and the first and second distributed receiving stations 1 and 2 transmit the received information wirelessly via lines 5 and 5, respectively. Send to dispatch room 4.

The wireless dispatch room 4 collects information on the situation of the same taxi 6, and since the collected information is obtained using two lines 5, it informs that the taxi 6 is located in block DE. Based on the result of this determination, a process is performed to collect the location of the taxi 6 as information.

In addition, each block EF, FD, DE indicated by diagonal lines in FIG.
Information such as the status and location of the taxi 6 at F can also be collected in the same manner as above.

Furthermore, the status and position information of the taxi 6 in each of the blocks D, E, and F, which are the white areas in FIG. 2, can be collected in the same way as in the conventional example.

In this way, when dividing an area (business area) into multiple blocks, by setting the coverage area of each distributed receiving station to overlap, more blocks can be divided, which means that the number of distributed receiving stations is smaller than the number of blocks. The number of lines 5 can be reduced as well as the number of lines 5. That is,
In the conventional example, when there are three distributed receiving stations, the area is divided into three blocks and information such as the status and position of the mobile stations within those blocks is collected. This is because by setting overlapping receivable areas, the area is divided into three blocks.

[Effects of the Invention] As explained above, according to the AVM system of the present invention, when dividing an area into multiple blocks, the coverage area of each distributed receiving station is set to overlap, and the area is divided into more blocks. Calls from mobile stations within blocks of the overlapping area are received by distributed receiving stations in the overlapping area, and these distributed receiving stations transmit information about the mobile station to the base station via the line. However, this base station receives this information and determines the location based on the line used, so it is possible to collect information such as the status and location of mobile stations in many blocks with a small number of distributed receiving stations. In other words, since the number of distributed receiving stations can be reduced, the running cost of the receiving stations can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of an AVM system showing an embodiment of the present invention, FIG. 2 is a schematic area block diagram explaining a region setting method in the above AVM system, and FIG.
The figure is a schematic block diagram illustrating a conventional AVM system. In the figure, 1 is a first distributed receiving station, 2 is a second distributed receiving station,
3 is the third distributed reception station, 4 is the base station (wireless dispatch room), 5 is the third distributed reception station;
is a line, and 6 is a mobile station (taxi).

Claims (1)

[Claims] (1) In an AVM system that transmits information such as the status of a mobile station in the coverage area of a plurality of distributed reception stations to a base station via a line, and makes it possible to grasp the status, position, etc. of each of the above-mentioned distributed reception stations. Set overlapping coverage areas by stations,
The overlapping zone is regarded as one area, and the status of mobile stations in that zone is received by a plurality of distributed receiving stations, and each distributed receiving station transmits the received status of the mobile station to the base station. When the base station receives the status of a mobile station from multiple distributed receiving stations, it determines that the mobile station is in an area overlapped by multiple distributed receiving stations, and determines the status and location of the mobile station. An AVM system characterized by being able to grasp the following information.