JP2004240743A - Vehicle designation device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle designation device and a method for it designating a vehicle required to response to polling by a single polling signal for making only the designated vehicle respond to polling for preventing unnecessary use of a radio line and improving data precision when data collection is carried out by polling. <P>SOLUTION: This vehicle designation device is provided with a status information storage means 6 storing the latest status information of the vehicle, a response designation information creation means 4 creating response designation information from the information stored in the status information storage means 6, and a polling means polling after adding the response designation information to the polling signal. The polling objective vehicle is clearly indicated in the polling signal, while response designation data making only the vehicle, which is required to respond after designation of the polling object vehicle, respond is added to the inside of the polling signal. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle designating device and method capable of collecting data on a vehicle position and a vehicle situation by using a wireless line without waste.
[0002]
[Prior art]
Conventionally, when collecting vehicle state data, if the number of vehicles is large, information collection using an arbitrary calling method cannot be performed, so the center device has to perform data collection using a polling method based on data collection control. I was in a situation that I could not do.
[0003]
When trying to collect vehicle status information using an arbitrary calling method, the accuracy of the collected data can be ensured if wireless connection with the target vehicle is possible at any time, but if the number of vehicles is large, it can be Wireless connection becomes difficult.
[0004]
In order to avoid this, the conventional method of polling has been to rely on data collection by the polling method.However, the data collection by the conventional polling method performs polling in the order of vehicle number, regardless of the condition of the vehicle, and polling response data from the vehicle. We were collecting data. As a technique for collecting vehicle state information, for example, the current position of a vehicle by a polling method or the like, for example, Patent Document 1 is known.
[0005]
However, in the conventional polling method as described above, the polling response slots are determined in the order of the vehicle number. Therefore, slots are allocated to vehicles that do not require polling response, and unnecessary response slot time is secured. There is a problem that the wireless line is wasted as much as possible.
[0006]
Furthermore, since the polling was performed in the order of the vehicle number, the data accuracy of the vehicle state obtained from all the vehicles was the same. Therefore, even if a vehicle is equipped with a GPS receiver or the like, the current position of the vehicle is detected, and vehicle state information including the current position is reflected in transmission to the center device. In order to transmit the vehicle state information by response to the center device, there is a problem that even if the current position information of the vehicle is obtained, the accuracy of the position data of the vehicle required by the center device is poor, and the vehicle cannot be used for taxi dispatching business. Was.
[0007]
For example, assuming that there are 200 vehicles as taxis and 300 msec of data transmission time is required for each vehicle, the vehicle state information was transmitted to the center device at a minimum interval of 60 seconds. In such a case, the vehicle travels 666 m when transmitting once and then transmitting again, and there is a problem that the position accuracy is reduced when data is collected by the center device.
[0008]
[Patent Document 1]
JP 2000-222690 A
[Problems to be solved by the invention]
The present invention solves the conventional problem described above. When data is collected by polling, a vehicle that requires a polling response is designated by a single polling signal, and only the designated vehicle is made to perform a polling response, and the wireless communication of the radio line is performed. It is an object of the present invention to provide a vehicle specifying device and method which prevent useless use and improve data accuracy.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a vehicle specifying device according to the present invention includes a state information storage unit that stores the latest state information of a vehicle, and a response that creates response specification information based on the information stored in the state information storage unit. Designation information creating means, and a polling means for performing polling by adding the response designation information to a polling signal, and specifying only the vehicle to be polled in the polling signal and only responding to the vehicle that needs a response after the target vehicle is specified. The response designation data to be performed is added.
[0011]
With this configuration, it is possible to reduce the total number of slots of the polling response by making only the vehicle that needs a response, improve the accuracy of the collected data, and reduce waste of the wireless line.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a block diagram showing a configuration of a vehicle specifying device according to an embodiment of the present invention, which is applied to collecting data of a taxi position and a vehicle condition, targeting a taxi as a vehicle.
[0014]
In FIG. 1, a taxi that is open has a terminal wireless unit 2 that receives a polling signal from a center facility 20 and transmits response data to the center facility 20 as specified, as a mobile terminal facility (vehicle terminal) 10. And a signal processing unit 1 for detecting a vehicle status such as a real vehicle, an empty vehicle or a pick-up vehicle, a vehicle current position, and a passenger waiting status, and analyzing response designation data. A center radio unit 3 for transmitting a polling signal including response designation data to a plurality of terminal radio units 2; a communication control unit 4 for generating a polling signal including response designation data; A central processing unit 5 that gives the latest information on the state of the vehicle that is the basis of the response designation data to the unit 4; and a latest vehicle that is connected to the central processing unit 5 and that has data collected in advance. A storage unit 6 for storing a state, and a microphone 7 with a press-talk switch connected to the communication control unit 4 for communicating with a vehicle in a mode in which wireless communication by an arbitrary calling system (individual calling system) is possible are provided. Have been. Although not shown, the communication control unit 4 has a built-in speaker.
[0015]
The operation of the vehicle designation device configured as described above will be described with reference to FIGS.
[0016]
The central processing unit 5 reads the latest vehicle state of the vehicle stored in the storage unit 6 by data collection in advance and transmits the latest vehicle state to the communication control unit 4. The communication control unit 4 has a function of temporarily storing the latest vehicle state information of the vehicle received from the central processing unit 5.
[0017]
When a predetermined time has elapsed or when a switch (not shown) of the microphone 7 with the press-talk switch connected to the communication control unit 4 is pressed, the communication control unit 4 temporarily stores the latest vehicle information. Based on the vehicle state information, response designation data of predetermined bits, for example, 16 bits, is created, and polling is performed by adding the response designation data to a normal polling signal (data). Each bit from the MSB to the LSB of the response designation data corresponds to each of the consecutive vehicle numbers, and if "1" is set in the bit position, it is used as a designation of "response", and is continuous by 16 bits. 16 vehicles can be designated.
[0018]
FIG. 2 shows details of the response designation data when polling is performed by adding response designation data to a polling signal (data). In the example in FIG. 2, the first vehicle number of a plurality of vehicles to be polled is number 101, and subsequently, the last vehicle number up to number 116 is a polling target vehicle. In order from the first bit, if the bit is “1”, “response” is specified, and if “0”, “non-response” is specified. The response can be specified.
[0019]
When polling the polling target vehicle, the communication control unit 4 sets the leading vehicle number and the number of polling replies (16 in the case of FIG. 2) in the polling data as in the related art. , And 16-bit response designation data is added to the polling signal and transmitted from the center radio unit 3 to a plurality of polling target vehicles. FIG. 2 illustrates an example in which 16 units are specified by the response specification data. However, when the number of units is increased from 16 units, it is easily realized by increasing the number of bits added as the response specification data. Can be.
[0020]
The terminal radio section 2 of the mobile terminal equipment 10 receives the polling signal, analyzes the added response designation data, determines whether the own terminal corresponds to the response or does not correspond to the response. The response designation position and the polling response slot order are calculated by the signal processing unit 1 of the mobile terminal equipment 10, and a response is transmitted from the terminal radio unit 2 when the response designation is applicable. If the response does not correspond to the designation of the response, no data transmission is performed until the response for the number of polls is completed so as not to interfere with the polling response of the other station.
[0021]
In FIG. 2, since the polling response cannot be performed for the vehicle number for which the response designation data is designated as “0”, the response is performed in the order of the vehicle numbers 101, 103, and 104, and the response is not applicable. By polling the time slots, the polling slots used are shortened. On the other hand, in the conventional polling response method, the polling response is to be performed in the order of the vehicle numbers 101, 102, 103, and 104. Therefore, the vehicle designation method according to the embodiment of the present invention is implemented. As a result, it is possible to collect only the vehicle state data required by the system.
[0022]
As described above, according to the present invention, when polling a predetermined number of continuous vehicles from the center equipment at an arbitrary timing based on the vehicle state information stored in the storage means, the polling signal includes the number of the vehicle to be polled. That is, assigning the last vehicle number from the first vehicle number to specify the polling target vehicle and adding a predetermined bit to specify whether the polled vehicle needs a polling response as response designation data after specifying the polling target By doing so, the total number of polling response slots to be responded to is reduced.
[0023]
As a result, when data is collected by polling, only vehicles that require a polling response are made to respond, thereby improving the accuracy of the obtained data and reducing waste of wireless lines.
[0024]
Incidentally, when comparing the present invention with the conventional example in a taxi dispatching system with 100 vehicles, an actual vehicle rate of 50%, and a polling collection period of 3 seconds and 10 vehicles, conventionally, an empty vehicle responds to polling every 30 seconds. However, according to the present invention, a polling response can be performed once every 15 seconds, and data accuracy can be improved.
[0025]
【The invention's effect】
As described above, according to the present invention, only the vehicles that need to be responded among the vehicles to be polled are responded and the total number of slots of the polling response is reduced to collect data, so that the number of vehicles is large and the vehicle state and position due to an arbitrary call can be determined. Even when it is not possible to grasp the data, the effect of improving the data accuracy of the vehicle state and the position by the polling method can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a vehicle designation device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a polling format including an example of response designation data according to the embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Signal processing part 2 Terminal wireless part 3 Center wireless part 4 Communication control part 5 Central processing part 6 Storage part 7 Microphone with a press talk switch 10 Mobile terminal equipment 20 Center equipment

Claims (5)

State information storing means for storing the latest state information of the vehicle, response specifying information generating means for generating response specifying information based on the information stored in the state information storing means, and adding the response specifying information to a polling signal And a polling means for performing polling by means of a vehicle, wherein response specification data is added in the polling signal to specify only the vehicle to be polled and to respond only to the vehicle which needs a response after specifying the target vehicle. apparatus. A vehicle designating method comprising: collecting state information of a plurality of vehicles based on the latest position state information of the vehicle with a polling signal designating the plurality of vehicles to which a response is to be returned. An in-vehicle terminal having position detection means for detecting the current position of the vehicle, and transmission means for transmitting vehicle state information including the current position of the vehicle in response to polling,
A vehicle specifying polling unit that performs polling for specifying a vehicle with respect to the in-vehicle terminal; a receiving unit that receives the vehicle state information; a storage unit that stores the vehicle state information; and a vehicle storage unit that stores the vehicle state information. And a communication control means for reading out the latest state information and creating vehicle-specific polling data. 4. The vehicle management system according to claim 3, wherein the vehicle state information includes at least a current vehicle position, a passenger riding state, or a customer waiting state. 5. The vehicle-mounted terminal includes: a position detection unit that detects a current position of the vehicle; and a position information storage unit that stores current position information of the vehicle detected by the position detection unit. 4. The vehicle management system according to claim 3, wherein when polling is performed, the current position of the vehicle stored in the position information storage unit is transmitted together with the vehicle status.

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