JPH0879833A - Mobile communication equipment and its channel control method - Google Patents

Abstract

PURPOSE: To attain effective utilization of a channel by generating a channel hold request to hold a channel for a prescribed time when a caller discriminates that a speech disable time is short to prevent undesired channel occupancy. CONSTITUTION: In the case that an automobile soon enters a speech disable block such as a tunnel in the talking state, when the caller discriminates that the speech disable block passing time is within a prescribed time, the caller depresses a hold request button 18. A control section 12 receives a hold request signal to set a telephone set 1 to be a holding state. When the reception level is recovered before lapse of the prescribed time, the talking state is again transited. When the reception level is not recovered within the prescribed time, the channel is open immediately. When the caller discriminates that the speech disable block required much time and dies not operate the hold request button 1, the channel is open as the reception level decreases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a line control method in a mobile communication device and a mobile communication device using the same.

[0002]

2. Description of the Related Art In a car telephone system, which is a typical example of mobile communication, a moving car is not always in a place with a good radio wave condition. Is a problem.

In a conventional car telephone, for example, even if the user goes to a place where radio waves do not reach, such as a tunnel, the line is not immediately released but put on hold, and when the radio wave becomes strong again within a certain time, the call is restarted. A method has been proposed (Japanese Patent Laid-Open No. 32-32541).

[0004]

However, the above-mentioned conventional example has a problem that the line is unnecessarily held because the call is unconditionally put on hold when the received radio wave is lowered. It was For example, if the tunnel that entered is very long, or if the power supply on the mobile phone side suddenly turns off, it is not possible to resume the call in a short time, but the base station side will be Keeps transmitting the call line.

It is an object of the present invention to provide a mobile communication device and a line control method capable of preventing unnecessary line occupation and promoting effective use of the line.

[0006]

A line control method for a mobile communication device according to the present invention holds a communication line for a predetermined time when a line hold request occurs in a communication state, and a reception level during a hold state period. When communication is resumed, communication is resumed, and the communication line is disconnected when the reception level decreases in the communication state or when the hold state continues for a predetermined time or longer.

[0007]

When the call unavailable time is short, such as when entering a short tunnel, a line hold request is generated to hold the line for a predetermined time, and if the reception level recovers during that time, the call is resumed. When communication is impossible for a long time such as when entering a long tunnel or when the power of the device is turned off, the line is disconnected at the same time as the reception level is lowered without generating the line hold request.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a first mobile communication device according to the present invention.
It is a block diagram which shows an Example. The car radio telephone device 1 of this embodiment includes a radio unit 11 connected to an antenna 10.
A reception level detection unit that includes a control unit 12 that controls the entire telephone device, a display unit 13, an operation unit 14, a transmitter 15, and a receiver 16, and that further detects the electric field level of the radio wave received by the wireless unit 11. 17 and a hold request button 18 for the operator to make a call hold request. Control unit 1
When receiving the hold request signal Sh from the hold request button 18, the line 2 performs the line hold control for the wireless unit 11 described below.

FIG. 2 is a flow chart showing an embodiment of the line holding method according to the present invention.

First, it is assumed that a line is connected by an incoming call or an outgoing call (S101) and a call state is established (S10).
2). In this state, the control unit 12 constantly monitors whether or not the hold request signal Sh is input from the hold request button 18 (S103) and whether or not the reception level detected by the reception level detection unit 17 has decreased (S104). To do. If there is no hold request and there is no decrease in reception level (S103 and S104)
N), the control unit 12 continues the call state.

Consider a case where the car is about to enter a call-disabled section such as a tunnel in a call state. Since the user can roughly estimate the time to pass through the call-disabled section in the front, when the user judges that the required time is less than the predetermined set time, the hold request button 1
Press 8. When the hold request signal Sh is input (Y in S103), the control unit 12 puts the telephone device 1 on hold (S1).
05), the hold state is maintained until the reception level recovers or a predetermined set time elapses (S106 and S10).
7 N). When the reception level recovers before the set time has elapsed (Y of S106), the state of the call again starts. If the reception level does not recover within the set time (Y in S107), the line is immediately released (S10).
8).

If it is determined that the call-disabled section will take a long time, the user does not operate the hold request button 18, thereby lowering the reception level (Y in S104).
The line is released (S108). In this way, it is possible to avoid a situation in which the line is unnecessarily occupied in order to determine in advance the length of the call-disabled section and decide whether or not to hold the line.
It is possible to effectively use the line.

In the present embodiment, the case where the user himself / herself determines whether or not to make a hold request (step S103 in FIG. 2) has been shown, but of course, the Global Positioning System (GPS) currently provided or It is also possible to generate the hold request signal Sh using the road traffic information communication system.

FIG. 3 shows a second mobile communication device according to the present invention.
It is a block diagram which shows an Example. Since the present embodiment is different from the first embodiment only in the method of generating the hold request signal Sh, the same parts as those in the block diagram of FIG.

The so-called car navigation system is built in the car radio telephone system 1 of this embodiment.
A GPS reception unit 20, a hold request determination unit 21, and a memory 22 including a CD-ROM storing map information are provided.

The position information received by the GPS antenna 23 and the map information stored in the memory 22 are input,
Whether or not the hold request determination unit 21 generates the hold request signal Sh by reading the information of the tunnel in the traveling direction, calculating the tunnel passage time from the length, and comparing the passage time with the set hold time. Determine whether or not. That is,
As shown in FIG. 2, in the case of a long tunnel, the hold request is not generated and the line is opened due to a decrease in the reception level, and in the case of a short tunnel, the hold request signal Sh is generated and the hold state is held for a certain period of time. When the reception level recovers, the call is resumed.

The position information can be obtained not only by GPS but also by a road traffic information communication system. In that case, the GPS receiving unit 20 in FIG. 3 may be changed to a road traffic information receiving unit. The determination as to whether or not to generate the hold request is similar to that in the case of GPS.

[0019]

As described in detail above, the mobile communication device and the line control method according to the present invention generate a line hold request when the call unavailable time is short, such as when entering a short tunnel. Then, the line is held for a predetermined time, and if the reception level recovers during that time, the call is resumed. When communication is impossible for a long time such as when entering a long tunnel or when the power of the device is turned off, the line is disconnected at the same time as the reception level is lowered without generating the line hold request. As a result, unnecessary line occupation can be avoided when communication cannot be performed for a long time, and effective use of the line can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a mobile communication device according to the present invention.

FIG. 2 is a flowchart showing an embodiment of a line holding method according to the present invention.

FIG. 3 is a block diagram showing a second embodiment of the mobile communication device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Car radio telephone device 10 Antenna 11 Radio part 12 Control part 13 Display part 14 Operation part 15 Transmitter 16 Handset 17 Reception level detection part 18 Hold request button 20 GPS receiving part 21 Hold request judging part 22 Map memory 23 GPS antenna

Claims (8)

[Claims] 1. A line control method for a mobile communication device having a reception level detection function and a line hold function, wherein when a line hold request occurs in a communication state, the communication line is held for a predetermined time, and the hold state period is held. Communication is restarted when the reception level recovers during the communication, and the communication line is disconnected when the reception level decreases in the communication state or the hold state continues for the predetermined time or more. How to control the line. 2. The line hold request is generated by pressing a hold request button.
Described line control method. 3. A transit time of an incommunicable section existing ahead is calculated based on position information obtained by a global positioning system (GPS) and map information provided on a mobile body, and the transit time is The line control method according to claim 1, wherein the line hold request is generated only when the time is shorter than a predetermined time. 4. The line control method according to claim 1, wherein the mobile communication device is a car telephone device. 5. A mobile communication device in a mobile communication system, a transmission / reception means for forming a communication line with a base station, a reception level detection means for detecting an electric field level of a received radio wave, and a line hold request signal. Hold requesting means for maintaining the transmission / reception means in a line hold state for a predetermined time in accordance with the generation of the line hold request signal, and restarts communication when the reception level recovers within the predetermined time, A mobile communication device comprising: a control unit that disconnects the communication line when the reception level decreases in the communication state or when the hold state continues for the predetermined time or longer. 6. The mobile communication device according to claim 5, wherein the hold requesting means is a button that generates the line hold request signal when pressed. 7. The hold requesting means is a GPS receiving means for receiving position information by a global positioning system (GPS), a map information memory provided in a mobile communication device, and the GPS receiving means. Determining means for calculating the passage time of the incommunicable section existing ahead based on the position information and the map information, and generating the line hold request only when the passage time is shorter than the predetermined time; 6. The line control method according to claim 5, comprising: 8. The line control method according to claim 5, wherein the mobile communication device is a car telephone device.