JPH04324720A - Talking equipment for on-vehicle radio communication system - Google Patents

Abstract

PURPOSE:To prevent interruption of a speech head at the start of transmission with respect to the talking equipment. CONSTITUTION:The talking equipment in the on-vehicle radio communication system between a base station 1 and plural automobiles 2 is provided with a radio communication means 3 and a transmission state changeover means 4 bringing the radio communication means 3 into the transmission state or the non-transmission state. The talking equipment reaching the transmissible state after the communication for prescribed system control after the point of time when the radio communication means 3 is switched to the transmission state by the transmission state changeover means 4 is provided with a transmission state offer means 5 offering the transmissible state to a talking party.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device in a vehicle wireless communication system.

0002

2. Description of the Related Art Mobile communications are used in taxis and the like, in which a radio is mounted on a vehicle and a telephone call is made between the vehicle and a fixed station. The mobile communication system used in taxis and the like is a vehicle wireless communication system different from general public car telephones, and is used by taxi companies and the like.

FIG. 5 is a diagram showing such a vehicle wireless communication system, in which a base station 1c and each vehicle 2c can communicate with each other. In such a dedicated car phone system, one radio frequency is used by 200 to 300 mobile devices, and a press-talk method is used in which radio waves are emitted by pressing a button on the transmitting microphone only when making a call. There are many. In some cases, you can immediately send a call by pressing the button on the transmitting microphone, but as shown in Figure 6, the guard time period and the communication period for control signals necessary to control the communication line have elapsed from the time the button was pressed. rear,
The device is often in a transmitting state.

[0004] For example, in taxi radio, there are cases where a single radio frequency is shared by multiple taxi companies due to the high demand for wireless service. , it is necessary to connect the line between the corresponding taxi company's office and the taxi. Therefore, in the control signal communication shown in FIG. 6, company identification codes and the like are communicated. There are two ways to communicate these control signals: one is to use a number of frequency tones arranged within the audio frequency band, and the other is to use a pulse method. However, in vehicle communication such as taxi radio, the tone method is used. is common.

[0005]

[Problems to be Solved by the Invention] In the above-mentioned vehicle wireless communication system, a ring tone is generated to call the other party like a normal telephone, and the call is activated when the other party picks up the receiver and goes into a talking state. It is not clear to anyone. Therefore, users of this system often think that they can speak immediately after pressing the button on the transmitting microphone, and begin speaking immediately after pressing the button.

However, in the conventional system, as mentioned above, it becomes possible to transmit after the guard time period and the control signal communication period have elapsed from the moment the button on the transmitter microphone is pressed, so it is not possible to speak immediately after pressing the button. If this happens, the portion of the message that was spoken until it becomes ready to send a message will not be transmitted, resulting in a phenomenon called ``cutting off''. Due to this phenomenon of being at a loss for ideas, you may not be able to fully convey the content of your conversation to the other person.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to prevent the cut-off phenomenon in a vehicle wireless communication system.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the communication device for a vehicle wireless communication system of the present invention presents to the caller that the caller is in a state where the caller can make a call, and the caller is in the state where the caller can make a call. and the state where it is impossible to make a call can be identified. FIG. 1 is a diagram showing the basic configuration of a communication device according to the present invention. In the drawings, the same functional parts are denoted by the same numbers, and lowercase letters of the alphabet are sequentially denoted in each figure showing the configuration from FIG. 2 onwards.

That is, the communication device of the present invention is a communication device in a vehicle radio communication system between a base station 1 and a plurality of automobiles 2, and the communication device is a communication device in a vehicle radio communication system between a base station 1 and a plurality of automobiles 2. Transmitting state switching means 4 for setting the transmitting state
In a telephone device that is equipped with a transmitting state and becomes a transmitting state after performing communication for predetermined system control from the time when the wireless communication means 3 is switched to the transmitting state by the transmitting state switching means 4, the transmitting state is set to the transmitting state. The present invention is characterized in that it includes a transmitting state presenting means 5 for presenting to the caller that the current status is the same.

0010

[Operation] If the transmitting state presentation means 5 presents the caller with whether or not the transmitting state is possible, the caller can start transmitting after recognizing the transmittable state and the transmittable state. No cuts occur.

[0011]

[Embodiment] First, an example of how to present to a caller that the wireless communication device is in a state where it is possible to send a call will be explained. As the presentation means, either a sound or a display can be considered, and here, the generation of a sound by a buzzer and the lighting of an LED are shown as examples. Furthermore, there are two possible ways to indicate that the device is in a transmittable state, either to indicate a transmittable state or to indicate a transmittable state, and FIG. 2 shows this.

As shown in FIG. 2, after a guard time and a control signal communication period have elapsed from the time when the button of the transmitting microphone is turned on, the transmitting state becomes possible, and when the button is turned off, the transmitting state ends. In (a), a buzzer sound is generated for a short time when the state becomes ready for sending a call to notify that the state becomes available for sending a call. In (b), a buzzer sound is generated during the guard time and control signal communication period to notify the period during which voice transmission is disabled while the button is pressed. In (c), the LED is turned on throughout the call-ready state. In (d), similarly to (b), the LED is turned on only during the period during which communication is disabled.

[0013] Any of the methods shown in FIGS. 2(a) to 2(d) can indicate to the caller that the caller is ready to send a call. In (a), it is actually difficult to make a call while the buzzer is occurring, although it is for a very short period of time, resulting in the problem of shortening the period during which you can send calls. This has the advantage of being able to confirm the start. In contrast, since the LED does not affect the telephone conversation, it is possible to keep the LED on all the time when the telephone is ready to transmit, as shown in (c). (b) notifies you of the period during which you cannot talk while the button is pressed, so it can be used in the same way as a normal telephone, and it is impossible to start talking while the buzzer is making a sound, so it is completely This has the advantage that it can prevent the head-off phenomenon.

Next, FIG. 3 shows a configuration for generating a buzzer sound. FIG. 3 shows a configuration for generating a buzzer sound for a short time when the transmitting state becomes possible as shown in FIG. 2(a). In the figure, reference numeral 4a denotes a button on the transmitting microphone, and the wireless communication device 3a detects that the button is pressed and outputs communication radio waves from the wireless device to start transmitting. At that time, as shown in FIG. 2, after a guard time, if it is a taxi radio, control signals such as company codes are communicated, and then the audio signal from the microphone is superimposed on the carrier wave to make it possible to transmit. At this time, the monostable multivibrator 51a sends a transmission ready state start signal in accordance with the change to the transmission enabled state.
Output to. Monostable multivibrator 51a
outputs a pulse that continues for a predetermined period from the transmitting state start signal as shown in FIG.
A short buzzing sound is output from 3a.

In the configuration shown in FIG. 3, if a buzzer sound is to be generated while the communication is disabled, the wireless communication device 3a (
A signal as shown in b) is output, and the signal is sent to the amplifier 5.
2a, and the buzzer 53a outputs a buzzer sound while the call is disabled. The guard time and control signal communication period shown in Figure 2 are often constant for each system, so by counting the time from when the button on the transmitting microphone is pressed, it can be determined that the transmitting state is possible. . Therefore, as shown in FIG. 4, switching signals from the button 4b of the transmitting microphone may be counted to control the lighting of the LED as shown in FIG. 2(c). In FIG. 4, 54b is a counter, which outputs a pulse to the flip-flop 55b after counting the clock signal for the duration of the communication disabled state, and outputs a pulse to the LED 56.
Turn on b. The flip-flop 55b is reset when the button 4b is turned off, and the LED 56b is turned off.

The case of FIG. 2(d) can also be realized with a similar configuration, but the explanation will be omitted here. Note that it is also possible to use an LED instead of the buzzer in the configuration shown in Figure 3, or to use an LED instead of the buzzer in the configuration shown in Figure 4.
Of course, it is also possible to use a buzzer instead.

[0017]

Effects of the Invention According to the present invention, it is possible to realize a telephone communication device in which a caller can detect whether or not the caller is in a state in which a call is possible, and it is possible to prevent a phenomenon in which the beginning of a call is cut off at the start of a call.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of a communication device of the present invention.

FIG. 2 is an explanatory diagram of a form in which a state in which a call is possible is presented to a caller.

FIG. 3 is a diagram illustrating the configuration of an embodiment that generates a buzzer sound at the start of a voice transmission enabled state.

FIG. 4 is a diagram illustrating the configuration of an embodiment in which the transmitting state is enabled after a certain period of time has elapsed from the signal of the switch operation that changes the transmitting state of the wireless communication device.

FIG. 5 is a diagram showing a vehicle wireless communication system.

FIG. 6 is an explanatory diagram of the operation at the time of starting voice transmission in the vehicle wireless communication system.

[Explanation of symbols]

1...Base station 2...Car 3...Wireless communication means 4...Talking state switching means 5...Sending state presentation means

Claims (1)

[Claims] Claim 1: A communication device in a vehicle wireless communication system between a base station (1) and a plurality of automobiles (2), comprising: a wireless communication means (3); and a transmitting state switching means (4) for switching between a transmitting state and a non-transmitting state, and a predetermined system control from the time when the wireless communication means (3) is switched to a transmitting state by the transmitting state switching means (4). In a communication device for a vehicle wireless communication system that becomes available for communication after performing communication for the purpose of communication, a communication state presentation means (5) for presenting to a caller that the communication is available for communication
) A communication device for a vehicle wireless communication system.