JP3147889B2 - Mobile communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile communication device, and more particularly, to a mobile communication device usable in a plurality of communication systems.

[0002]

2. Description of the Related Art At present, there are various communication systems which differ depending on regions, applications, and the like. For example, there are PHS and cordless systems that have relatively low communication costs due to the simplicity of the network, but do not guarantee communication during high-speed movement. On the other hand, there are mobile phones and cellular systems in which communication costs are relatively high but measures such as handover and fading during high-speed movement are taken, and communication is guaranteed even during high-speed movement. Further, there is a pager system that enables reception only when moving.

In such a number of communication systems,
Communication equipment corresponding to each communication system, for example, PH
S and mobile phones exist.

However, in consideration of the convenience of the user of such a portable radio terminal, a portable radio terminal that can be connected to a plurality of communication systems by one portable radio terminal has been proposed.

[0005]

In a portable radio terminal that can be connected to a plurality of such communication systems, for example, a cordless system and a cellular system, it is preferable to access the cordless system preferentially in terms of communication costs. It has been. Therefore, if priority access to the cordless system is adopted, a cordless system in which communication is not originally guaranteed is accessed even in a moving object such as an automobile moving at high speed. In this case, there is no problem when getting in the car, when the car is stopped at a traffic light, or when running at a low speed that does not affect communication, but it always runs at a speed below the speed that does not affect communication. It cannot be stopped. Therefore, if a standby or call is made by a cordless system in a car or the like, a call may be interrupted when the car starts moving at high speed.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an improved mobile communication device.

Another object of the present invention is to provide a mobile communication device capable of automatically accessing a communication system optimal for communication.

[0008] Another object of the present invention is to provide a mobile communication device that determines a call during a call to secure an appropriate call.

[0009]

A mobile communication device according to the present invention includes a plurality of wireless communication means capable of communicating with a plurality of communication systems, and a control for selecting and using one of the plurality of wireless communication means. Means, and the control means is in a call
Judge whether the call is using high-speed mobile communication,
If it is determined that a call using high-speed mobile communication is
The feature is to continue talking .

The mobile communication device according to the present invention has a high speed.
First wireless communication means capable of mobile communication, and high-speed mobile communication
A second wireless communication means that is not capable of
Control means for selecting and using the second wireless communication means.
And the control unit is configured to control the first wireless communication unit during a call.
Whether the call is using high-speed mobile communication
If it is determined that a call is being made using high-speed mobile communication,
The feature is that the call is continued as it is.

[0011] The control means may further include a high-speed mobile communication.
If it is determined that the call is not a phone call, it is a call in the car
If the call is determined to be in the car,
It is characterized by executing.

Further, the mobile communication device of the present invention comprises a first wireless communication means capable of high-speed mobile communication, a second wireless communication means incapable of high-speed mobile communication, and the first and second wireless communication means.
Control means for selecting and using the wireless communication means, determining means for determining the possibility of high-speed mobile communication, and when the determination in the determining means indicates the possibility of high-speed mobile communication, the control means Waiting and calling by the second wireless communication means are prohibited, and the first wireless communication means is given priority.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a mobile communication apparatus according to a preferred embodiment of the present invention.

In FIG. 1, a first wireless communication unit 1 is a communication unit that enables wireless connection with a communication system that does not guarantee communication during high-speed movement, preferably a cordless system such as a PHS. The second wireless communication unit 2 is a communication unit that enables wireless connection with a communication system that guarantees communication in high-speed movement, preferably a cellular system such as a mobile phone. The wireless communication unit 1 includes a transmission / reception unit, and performs processing of a high-frequency signal and frequency conversion.
1 and a first signal processing unit 12 for processing a baseband signal. Similarly, the wireless communication unit 2 includes a transmitting and receiving unit, and a second wireless unit 12 that performs high-frequency signal processing and frequency conversion, and a second wireless unit 12 that performs baseband signal processing.
And the signal processing unit 12.

The first and second wireless communication sections may have independent antennas, or may use a common antenna and switch between them.

A central control unit (CPU) 3 controls at least the first and second wireless communication units 1 and 2. This control includes well-known control in each wireless communication unit, and switching control between both, which will be described in detail later.

Microphone 4, receiver 5 and numeric keypad 6
Is well known, and a call is made using the microphone 4 and the receiver 5. The numeric keypad 6 is for inputting a telephone number or the like of the other party, and preferably includes various function keys.

The interface (I / O) 7 is an interface with a battery or an adapter for driving a moving body such as an automobile, and a car battery or a car adapter in an automobile. The detection unit 8 detects the connection between the car battery and the interface 7 and supplies a detection signal to the CPU 3. This detection signal may be supplied to the CPU 3 only when a connection is detected, or the presence or absence of a connection is determined by the CPU 3.
The signal may be supplied as a signal that is distinguished from each other when the connection is made and when it is not connected so that it can be determined. Further, not only the mechanical connection but also the electrical connection, that is, the presence or absence of the supply of the detection signal may be performed according to whether or not the power supply voltage is detected.

When the CPU 3 receives a detection signal indicating that connection with the car battery has been made, the CPU 3 determines that the own device is in the vehicle and that there is a possibility of performing high-speed mobile communication when performing communication. . Then, the CPU 3 prohibits communication access in the wireless communication unit 1 that is inappropriate for high-speed mobile communication, and automatically switches to communication access in the wireless communication unit 2 that is appropriate for high-speed mobile communication. Preferably, when no communication is being performed, a subsequent call or an incoming call is performed by the wireless communication unit 2, and when communication is being performed, an alarm is issued from the notification unit 9 to the user. The user is notified by the alarm unit 9
It can be recognized that communication is currently performed using the wireless communication unit 1.

The notifying section 9 can also be used as a speaker for notifying a normal ring tone. In this case, it is desirable to notify the connection with a notification sound different from the normal incoming notification.

The power supply circuit 10 receives power from a car battery via the interface 7, converts the power into a voltage to be supplied to each unit, and supplies the voltage to each unit. In FIG. 1, a power supply that is normally used, for example, a detachable battery is not shown. When the connection with the car battery is detected, the power consumption of the detachable battery can be reduced by supplying the power from the car battery to each unit, so that the power can be supplied from the car battery to each unit. It is preferable that such power supply switching control is performed by the CPU 3. That is, when the CPU 3 detects the connection with the car battery, it is preferable to supply the power from the power supply circuit 10 instead of supplying the power from the detachable battery.

Next, the operation of the mobile communication device of the present invention shown in FIG. 1 will be described.

When using the first wireless communication unit 1,
The radio signal in the cordless system received by the radio unit 11 via the antenna is frequency-converted and supplied to the signal processing unit 12. The signal processing unit 12 receives the frequency-converted signal from the wireless unit 11 and performs signal processing such as decoding. The audio signal from the signal processing unit 12 is CP
It is supplied from U3 to the receiver 5. On the other hand, the sound from the microphone 4 is supplied from the CPU 3 to the signal processing unit 12,
Signal processing such as encoding is performed, and the signal is converted into a wireless signal by the wireless unit 11 and transmitted from the antenna.

When using the second wireless communication unit 2,
The radio signal in the cellular system received by the radio unit 21 via the antenna is frequency-converted and then supplied to the signal processing unit 22. In the signal processing unit 22, the radio unit 2
The frequency-converted signal from 1 is input and signal processing such as decoding is performed. The audio signal from the signal processing unit 22 is sent to the CPU
3 to the receiver 5. On the other hand, the sound from the microphone 4 is supplied from the CPU 3 to the signal processing unit 22, subjected to signal processing such as encoding, converted into a wireless signal by the wireless unit 21, and transmitted from the antenna.

The switching between the first and second wireless communication units can be selected by the user using the numeric keypad 6.

When a detection signal indicating that the car battery is connected is input from the detection unit 8 via the interface 7, the CPU 3 determines that a communication system appropriate for high-speed mobile communication should be selected. At this time, it is also determined whether or not communication is being performed. If communication is not being performed, the wireless communication unit 2 enters a standby state. If there is a call instruction from the numeric keypad 6, communication is performed using the wireless communication unit 2. On the other hand, when the communication is being performed, the notification unit 9 notifies the user that the possibility of high-speed movement may be recognized by the user.

When the connection with the car battery is established, the CPU 3 controls the power supply circuit 10 to supply power.

In the standby state, if the wireless communication unit is fixed to one of the wireless communication units, it becomes impossible to receive a signal from a communication system that is not selected. Therefore, switching is performed at predetermined time intervals to receive a control signal. It is preferred to do so. In a state where the connection with the car battery is not detected, it is preferable that both wireless communication units perform standby. In this case, the antennas need to be prepared independently.

Next, referring to the flowchart of FIG.
The operation of the mobile communication device from power up to standby mode will be described.

In FIG. 2, when the power of the mobile communication device is turned on (step S101), the CPU 3 determines whether or not a detection signal is supplied from the detection unit 8 (step S102). When determining that the detection signal is not supplied (step S102, NO), the CPU 3 sets the first and second wireless communication units 1 and 2 in a standby state (step S103). That is, the wireless signal from both the cordless system and the cellular system can be received.

Thereafter, there is no outgoing call or incoming call (step S1).
04, NO), the standby state in both wireless communication units is maintained until the detection signal is supplied (step S105, N
O).

On the other hand, when the detection signal is supplied (step S105, YES), the standby in the first wireless communication unit 1 is prohibited or canceled (step S106), and only the second wireless communication unit 2 is used. Set to the standby state (step S1
07). That is, the standby in the cordless system is prohibited, and the standby mode in the cellular system is entered.

Thereafter, until a call or an incoming call is detected (step S108), steps S102 to S107 are performed.
Is repeated.

When the detection signal is supplied after the power is turned on in the process of step S101 (step S101).
102, YES), and enters the standby mode of only the second wireless communication unit 2, that is, the cellular system (step S107).

Next, referring to the flowchart of FIG.
The operation in the calling process will be described.

In FIG. 3, when a calling operation is performed using the numeric keypad 6, the CPU 3 checks a standby state in the wireless communication unit (step S201). If it is a standby only in the second wireless communication unit 1 (step S201, N
O), a calling process is performed from the second wireless communication unit 1 (step S202).

On the other hand, if the two wireless communication units are in the standby state (step S201, YES), the CPU 3 checks whether there is a detection signal (step S203). When the detection signal is confirmed in the process of step S203 (step S203, YES), the second wireless communication unit performs a calling process (step S202).

When the detection signal is not confirmed (step S203, NO), the call processing is performed in the first wireless communication unit 1 in consideration of the communication cost (step S204).
Thereafter, the CPU 3 monitors whether or not a detection signal is detected (step S205), and when the detection signal is detected,
An alarm is generated from the notification unit 9 (step S206).

When the user recognizes the alarm and performs a call end operation (step S207, YES), CPU 3 executes a call end process (step S208).

Also, when a call is made by the second wireless communication unit, a call termination process is executed if a call termination operation is performed.

In FIG. 3, the detection signal is not confirmed after the processing in step S202, but may be performed periodically. However, since there is no need to perform control such as switching, subsequent processing is not changed at all.

In FIG. 3, after the alarm is generated, the call termination process is executed in response to the user's call termination operation. However, regardless of the user's intention, the CPU 3 executes the call termination process after the alarm is generated. You may. In this case, it is preferable to automatically execute the call termination process after a predetermined time has elapsed after the alarm is generated.

Next, referring to the flowchart of FIG.
The operation during a call will be described.

In FIG. 4, CPU 3 determines whether or not a call is made using second wireless communication unit 2 (step S).
301). If the call is the second wireless communication unit 2, the call is continued (step S302).

On the other hand, if the call is the first wireless communication unit 1, the call is continued (step S303).
It is determined whether there is a detection signal (step S30).
4). If there is a detection signal, an alarm is issued from the notification unit 9 (step S305).

When the user performs a call end operation in response to this alarm (step S306, YES), CPU 3 executes a call end process (step S307). Also, when the second radio communication unit 2 performs a call termination operation while the call termination is continued, the CPU 3 executes the call termination process.

In FIG. 4, after the alarm is generated, the call termination processing is executed in response to the call termination operation by the user.
As described above, the call termination process may be automatically executed after a predetermined time. Further, the presence or absence of a detection signal may be periodically determined even during a call in the second wireless communication unit.

[0049]

As described above, in the present invention, a communication system that guarantees communication during high-speed movement and a communication system that cannot guarantee communication are used by judging the possibility of high-speed movement. A system suitable for the use environment can be automatically selected.

The system can be automatically selected by detecting the connection with a car adapter or a car battery used in the automobile.

Further, according to the present invention, since the most suitable system is selected according to the usage environment of the mobile communication apparatus, it is possible to avoid the disconnection of the communication during the call which the user feels unpleasant.

[Brief description of the drawings]

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

FIG. 2 is a flowchart for explaining the operation of the mobile communication device shown in FIG. 1 in a standby state;

FIG. 3 is a flowchart for explaining a calling operation of the mobile communication device shown in FIG. 1;

FIG. 4 is a flowchart for explaining the operation of the mobile communication device shown in FIG. 1 during a call;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st wireless communication part 2 2nd wireless communication part 3 Central control part 4 Microphone 5 Receiver 6 Numeric keypad 7 Interface 8 Detection part 9 Notification part 10 Power supply circuit 11 1st wireless part 12 1st signal processing part 21st 2 wireless section 22 second signal processing section

Claims (8)

(57) [Claims] 1. A communication system comprising: a plurality of wireless communication means capable of communicating with a plurality of communication systems; and a control means for selecting and using one of the plurality of wireless communication means. A mobile communication device characterized in that it is determined whether or not the call is a call using high-speed mobile communication, and if it is determined that the call is in use by the high-speed mobile communication, the call is continued as it is. 2. A first wireless communication unit capable of high-speed mobile communication, a second wireless communication unit not capable of high-speed mobile communication, and control for selecting and using the first and second wireless communication units. The control means determines whether the call is a call using high-speed mobile communication by the first wireless communication means during a call, and if it is determined that the call is being performed by high-speed mobile communication, A mobile communication device characterized by continuing a call as it is. 3. The mobile communication device according to claim 1, wherein the control unit further determines whether the call is in a vehicle when the call is not a high-speed mobile communication. . 4. The control means further determines whether the call is an in-vehicle call when it is determined that the call is not a high-speed mobile communication, and executes a call termination process when it is determined that the call is an in-vehicle call. The mobile communication device according to claim 1 or 2, wherein: 5. The mobile communication device according to claim 4, wherein said control means executes said call termination processing in response to a call termination operation by a user. 6. The mobile communication device according to claim 4, wherein said control means automatically executes said call termination processing. 7. The control device according to claim 3, wherein the control means determines the call in the vehicle by connection to a car adapter or a car battery. Mobile communication device. 8. The control means further determines the possibility of high-speed mobile communication, and when determining that there is a possibility,
The wireless communication means for communicating with a communication system suitable for high-speed mobile communication is prioritized, and waiting and calling by the wireless communication means for communicating with a communication system not suitable for high-speed mobile communication are prohibited. 1, 2, 3, 4, 5,
The mobile communication device according to any one of 6 and 7.