JPH08221695A - Mobile terminal device for vehicle movement management system - Google Patents

Abstract

PURPOSE: To provide a mobile terminal device for a vehicle movement management system capable of preventing radio interference on a radio line and efficiently (utilizing the radio line). CONSTITUTION: This vehicle movement management system generates a registration signal containing movement information on a moving vehicle by a terminal equipment 4 of a mobile station 10 and the movement information in managed by the vehicle movement management device 2 of a base station 30. The reception part 33 of the terminal equipment 3 detects whether or not there is a registration signal sent by another mobile station through a radio line. When the reception part 33 detects the registration signal of the later mobile station, a control part 42 does not generate a registration signal even when an operation display part 43 sets movement information and the mobile station 10 does not sent the registration signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle dynamics management system comprising a base station and a plurality of mobile stations mounted on a mobile vehicle, and managing the dynamics information of the relevant mobile vehicle registered by the mobile station at the base station. Mobile terminal device for mobile phones.

[0002]

2. Description of the Related Art In a conventional vehicle dynamics management system of this type, the mobile station transmits a wireless registration signal containing dynamics information at an arbitrary time, and when the base station receives the wireless registration signal, it sends a wireless response signal. Send. The above-mentioned dynamic information includes the action status of the moving vehicle, the moving status, and position information. The mobile station includes a radio that communicates with the base station via a radio line and the mobile terminal device connected to the radio.
The mobile terminal device is configured to set the dynamic information and to display a predetermined display information, an operation display unit, creates a registration signal including the dynamic information, and decodes the received response signal to decode the dynamic information and the decoded signal. And a control unit that creates the display information from the response signal, modulates the registration signal, sends the wireless signal to the wireless device, and receives a wireless response signal from the base station via the wireless device as the response signal. And a data transceiver for demodulation.

Now, when the operator of the mobile station inputs the dynamic information from the operation display section of the mobile terminal device, the dynamic information is passed to the data transmission / reception section via the control section, and the wireless device is further activated. The data is transmitted to the base station via the vehicle, and is passed to the vehicle movement management device of the base station to perform movement management of the moving vehicle.

[0004]

Since the conventional mobile station in the above-mentioned vehicle dynamics management system usually sends the radio registration signal by using the same radio line, a plurality of mobile stations can be sent to the base station. There is a problem in that the wireless registration signals from the two stations arrive at the same time, causing interference, and it becomes impossible to register the dynamic information. In order to solve this interference problem, it was necessary to provide the base station with a complicated circuit.

Further, since it is impossible to prevent interference from occurring again when the radio registration signal is retransmitted from these mobile stations, the transmission time of the radio registration signal increases,
There was a problem that interference increased more and more, and efficient use of wireless lines was hindered.

[0006]

A mobile terminal device for a vehicle dynamics management system according to the present invention is composed of a base station and a plurality of mobile stations mounted on the mobile vehicle, and includes a mobile station registered by the mobile station. A mobile terminal device for a vehicle dynamics management system that manages dynamic information at the base station, wherein the mobile terminal device communicates with the base station via a wireless line and using a wireless registration signal and a wireless response signal. An operation display unit that is connected to a wireless device of a mobile station, sets the dynamic information, and displays predetermined display information, and a receiving unit that detects the presence or absence of a wireless registration signal transmitted by another mobile station via the wireless line. , A registration signal including the dynamic information is generated only when the detection signal of the wireless registration signal is not received from the receiving unit, and when a response signal is received, the registration signal is decoded and the dynamic information and A control unit that creates the display information from the decoded response signal, and a response signal that is a wireless response signal from the base station that is transmitted via the wireless device while modulating the registration signal and transmitting the signal to the wireless device. And a data transmitting / receiving unit for demodulating the data.

The mobile terminal device can be used in the vehicle movement management system in which the base station receives the wireless registration signal and transmits the wireless response signal.

[0008]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.
FIG. 2 is a transmission timing chart of the registration signal A and the response signal B in this embodiment. FIG. 3 is a diagram showing a signal format in this embodiment, in which (a) is a registration signal A,
(B) is the response signal B.

The vehicle dynamics management system of the present embodiment comprises a base station 30 and a plurality of mobile stations 1 mounted on a moving vehicle, respectively.
0, 20 (not shown) and the like. In this vehicle movement management system, the mobile station 10 transmits a registration signal A including movement information at any time through a wireless line, and when the base station 30 receives the registration signal A, it transmits a response signal B through the wireless line ( See FIG. 2). Even if another mobile station, for example, the mobile station 30 transmits the registration signal A similar to the above, the base station 30 similarly transmits the response signal B upon receiving the registration signal A (see FIG. 2). The above-mentioned dynamic information includes the action status of the moving vehicle, the moving status, and position information.

Here, as shown in FIG. 3A, the registration signal A includes a synchronization signal, the above-mentioned dynamic information, the own station ID of the mobile station 10 transmitting this registration signal A, and an error correction signal. Further, the response signal B includes, as shown in FIG.
It includes a synchronization signal, a response signal indicating that the dynamic information is accepted, and an error correction signal.

The mobile station 10 includes a radio 3 and a terminal device 4. The terminal device 10 sets the dynamic information and displays an operation display unit 43 that displays predetermined display information, and a reception unit 44 that detects the presence or absence of the registration signal A transmitted by another mobile station.
Then, only when the detection signal of the registration signal A is not received from the receiving unit 44, the baseband registration signal (A) (having the same signal configuration as the registration signal A of FIG. 3A) including the above-mentioned dynamic information is created. Baseband response signal (B) (Fig. 3
(B) It has the same signal configuration as the response signal B) and decodes it to create the display information from the dynamic information and the decoded response signal, and the baseband registration signal. And a data transmitter / receiver 41 that demodulates the response signal B from the base station 30 received via the wireless device 3 to the above-mentioned response signal in the base band.

Next, the processing operation of the registration signal A and the response signal B in this embodiment will be described.

When it becomes necessary to register the dynamic information of the moving vehicle equipped with the mobile station 10, the operator of the mobile station 10 controls the dynamic information by operating the dynamic button of the operation display section 43 of the terminal device 4. Input to the section 42. Upon receiving the dynamic information, the control unit 42 adds the synchronization signal, the local station ID and the error correction code to the dynamic information and encodes the dynamic information.
A baseband registration signal (A) is created. The registration signal (A) is modulated by the data transmission / reception unit 41 and further transmitted from the wireless device 3 to the base station 30 as the registration signal A.

Here, the receiving unit 44 of the terminal device 4 constantly monitors whether another mobile station is transmitting the registration signal A by using the same wireless line as the wireless line used by the wireless device 3. ing. That is, the receiving unit 44 constantly monitors the received electric field level of the wireless line, and when it detects that the received electric field level is equal to or higher than a predetermined level, it indicates that the wireless line is in use. The line busy information is output to the control unit 42. In this state, the control unit 42
Stops the output of the registration signal (A) to the data transmitting / receiving unit 41. Therefore, by using the terminal device 4 of the present embodiment, it is possible to avoid interference caused by a plurality of mobile stations simultaneously using the same wireless line.

The base station 30 receives the registration signal A from the mobile station 10 in the wireless device 1, decodes the registration signal A into a digital signal, and sends it to the vehicle movement management device 2. The vehicle movement management device 2 registers the movement information of the moving vehicle equipped with the mobile station 10 based on this digital signal, and the movement management of the moving vehicle is performed. After the registration of the movement information, the vehicle movement management device 2 transmits the response signal B via the wireless device 1.

The terminal device 4 of the mobile station 10 which has received the response signal B via the radio 3 demodulates this signal in the data transmission / reception section 41 and sends the demodulated response signal (B) to the control section 42. . The control unit 42 decodes this response signal (B) to confirm that the moving vehicle equipped with the mobile station 10 has been registered, and the movement information and the response signal (B) input to the operation / display unit 43. Etc. are displayed.

FIG. 4 is a block diagram of the control unit 42 used in the terminal device 4 of this embodiment.

The operation / display interface unit 44 converts the dynamic information input from the dynamic button of the operation display unit 43 into a signal handled by the CPU unit 413 which processes information, and C
The display information from the PU unit 413 is converted into a signal suitable for the operation display unit 43. When the receiving unit 44 detects that the received electric field level of the response signal B is equal to or higher than a predetermined level, the incoming call detection unit 412 outputs the wireless line busy information indicating that the wireless line is in use as a logical signal. Receiving output,
This logic signal is passed to the CPU unit 413.

Upon receiving the dynamic information from the operation / display interface unit 414, the CPU unit 413 receives the incoming call detection unit 4
If you have not received the wireless line in use information from 12,
The self-station ID is read from the memory, the synchronization signal is created, the dynamic information and the self-station ID are calculated to create an error correction code, and these signals are sent to the signal encoding / decoding unit 411. Signal encoding / decoding unit 41
1 generates a registration signal (A) from these signals and sends it to the data transmitting / receiving unit 41. When the CPU 413 receives the wireless line busy information from the incoming call detector 412, the CPU 413 receives the dynamic information from the operation / display interface 414 and encodes the dynamic information into the signal encoder / decoder 441. Not send to.

The signal encoding / decoding section 411 is also provided.
When receiving the response signal (B) from the data transmitting / receiving unit 41, the mobile terminal 4 decodes the response signal (B) and
The response signal, which is the acceptance information for the activity information registration of the vehicle activity management device 2 of the base station 30 based on the registration signal (A) sent by the above, is output. This response signal is sent to the CPU unit 413, and the CPU unit 413 operates the operation / display interface 4
This response signal is displayed on the operation display unit 43 via 14 together with the above-mentioned dynamic information.

[0022]

As described above, according to the present invention, a receiving section for detecting the presence or absence of a wireless registration signal transmitted by another mobile station through the wireless line used in the vehicle movement management system, and the wireless registration from the receiving section. Since it includes a control unit that creates a registration signal containing the above-mentioned dynamic information and transmits a wireless registration signal to the base station only when not receiving a signal detection signal, it is possible to prevent interference in the vehicle dynamic management system, Further, there is an effect that the wireless line can be efficiently used.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a registration signal A and a response signal B in this embodiment.
FIG. 6 is a transmission timing chart of the above.

FIG. 3 is a diagram showing a signal format in the present embodiment, in which (a) is a registration signal A and (b) is a response signal B.

FIG. 4 is a block diagram of a control unit 42 used in the terminal device 4 of this embodiment.

[Explanation of symbols]

 1, 3 radio 2 vehicle dynamics management device 4 terminal device 10 mobile station 30 base station 41 data transmission / reception unit 42 control unit 43 operation display unit 44 reception unit 411 signal encoding / decoding unit 412 incoming call detection unit 413 CPU unit 414 operation / display Interface part

Claims (2)

[Claims] 1. A mobile terminal device for a vehicle dynamics management system, comprising a base station and a plurality of mobile stations mounted on a mobile vehicle, wherein the base station manages dynamics information of a corresponding moving vehicle registered by the mobile station. The mobile terminal device is connected to a wireless device of the mobile station that communicates with the base station using a wireless registration signal and a wireless response signal via a wireless line, and sets the dynamic information and a predetermined value. An operation display section that displays the display information,
A receiving unit that detects the presence or absence of a wireless registration signal transmitted by another mobile station on the wireless line; and a registration signal that includes the dynamic information only when the detection signal of the wireless registration signal is not received from the receiving unit. When a response signal is received, it is decoded, and further, the control unit that creates the display information from the dynamic information and the decoded response signal, and modulates the registration signal and sends the modulated signal to the wireless device and also through the wireless device. A mobile terminal device for a vehicle dynamics management system, comprising: a data transmitting / receiving unit that demodulates the received wireless response signal from the base station into the response signal. 2. The mobile terminal device according to claim 1, wherein the mobile station device is used in the vehicle dynamics management system that transmits the wireless response signal when the base station receives the wireless registration signal.