JP2002064872A - Portable terminal having radio communication function and its response method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal having a radio communication function which can improve the working efficiency of a power source cell. SOLUTION: The portable terminal driven by a cell 6 has various I/O units 1 and radio communication means 4. It comprises a means for holding a termination answer upon terminating of the radio communication means, until the 170 units end their operation. If starting and terminating of the I/O unit overlap, the superposition of their peak currents can be avoided to allow the operating limit level of the source cell voltage to be set low, thus improving the working efficiency of the power source cell.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal device having a wireless communication function and a method of responding to the wireless communication, and more particularly to a portable terminal device in which the peak current of the portable terminal device is suppressed and the use efficiency of a battery is increased. .

[0002]

2. Description of the Related Art In recent years, portable terminals incorporating a communication function such as PHS have been introduced for business use in many industries, and necessary data is transmitted from a center to a portable terminal of a person in charge of sales. In addition, a person in charge transfers data from the office to the center to improve work efficiency.

In addition, a portable terminal device is provided with a scanner function and the like in addition to a normal data processing and communication function, so that data can be taken in from a paper surface.

FIG. 5 shows a configuration of a conventional portable terminal device having a wireless communication function. This device is compatible with scanners and I
Various I / O devices 1 such as rDA, a radio transmission / reception unit 4 for transmitting / receiving radio waves of radio communication, a telephone control unit 3 for controlling radio communication performed through the radio transmission / reception unit 4, and a power supply for each unit of the portable terminal device. The system includes a battery 6 to be supplied, a voltage detecting unit 5 for detecting a voltage of the battery 6, and a CPU 2 for controlling each unit of the portable terminal device. The CPU 2 controls an I / O device 1 for various I / O devices. It comprises a unit 21 and a main control unit 22 for controlling the whole.

[0005] In this portable terminal device, a rechargeable battery such as a dry battery or a lithium ion secondary battery is used as the battery 6, and power is supplied to each of the operating parts from the battery. The voltage detection unit 5 detects the voltage of the battery 5, and when the battery voltage falls below the threshold value, transmits the detection result to the main control unit 22 by interruption, and receives the detection result.
Controls the operation of each unit so that the battery voltage does not fall below the minimum voltage that guarantees the stable operation of the logic circuit of the portable terminal device. If the battery voltage falls below this minimum voltage, continued use of the terminal will not be possible until the battery is replaced or recharged. Further, when the voltage drops, memory backup becomes impossible, and data may be destroyed.

FIG. 6A shows that an I / O control unit 21 operates in response to a command from a main control unit 22 so that an I / O device such as a scanner or IrDA can be used.
3 shows a change in battery voltage when the device 1 is started (turned on). With the current consumption in the I / O device 1, the battery voltage drops. This voltage drop increases as the internal resistance of the battery 6 increases, and is particularly remarkable in a dry battery having a high internal resistance. The period during which the battery voltage is falling is less than 1 second for reading by the scanner or emitting light of IrDA, and is about 1 or 2 seconds at most.

FIG. 6B shows that the radio wave transmitting / receiving unit 4 receives an incoming radio wave from the network, and under the control of the telephone control unit 3,
The state of a drop in battery voltage when an incoming call response radio wave is transmitted is shown.

In the case of FIGS. 6A and 6B, even when the battery voltage drops, the voltage level has not reached the threshold value, so that the voltage detecting section 5 outputs the interrupt signal to the main control section 22. No output is performed, so that the operation of the I / O device 1 is continued, and the transmission of the radio wave of the incoming call response to the incoming call is performed through the radio wave transmitting / receiving unit 4.

[0009]

However, in this conventional portable terminal device, if there is an incoming call while the I / O device 1 is being started, an incoming call response radio wave is transmitted.
As shown in (c), when the battery voltage drop due to the activation of the I / O device 1 and the battery voltage drop due to the transmission of the incoming call response radio wave, and as a result, the battery voltage level drops below the threshold value Occurs.

When the voltage level of the battery falls below the threshold value, an interrupt signal is output from the voltage detection unit 5 to the main control unit 22 and the operation of each unit is stopped under the control of the main control unit 22.

In order to avoid such a situation, the battery voltage does not fall below the threshold value even when the battery voltage drop due to the activation of the I / O device 1 and the battery voltage drop due to the transmission of the incoming response radio wave. In addition, it is necessary to maintain the battery voltage at a high level by changing the battery in a short cycle or performing frequent charging.

As a result, even in the case of a battery that has a remaining battery level that can still perform a steady operation, in order to prepare for a large peak current, the use of a dry battery must be discontinued, and a rechargeable battery must be recharged. Use efficiency will be reduced.

SUMMARY OF THE INVENTION The present invention addresses the above-described problems and provides a portable terminal device having a wireless communication function capable of suppressing a peak current and improving the use efficiency of a power supply battery, and a method of responding to an incoming call. It is intended to provide.

[0014]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a portable terminal device, which is provided with various I / O devices and wireless communication means, and is driven by a battery, and performs wireless communication during operation of the I / O device. When there is an incoming call in the means, there is provided an incoming call holding means for holding the incoming call response until the operation of the I / O device ends.

In the method for responding to an incoming call of the portable terminal device, when there is an incoming call to the wireless communication means during the operation of the I / O device, the system waits for the end of the operation of the I / O device. Radio waves are transmitted.

Therefore, even when the activation of the I / O device and the incoming call overlap, the superposition of the peak current can be avoided. Therefore, the use limit level of the battery voltage can be set low, and the use efficiency of the power supply battery can be increased.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) As shown in FIG.
Various I / O devices 1 such as rDA, a radio transmission / reception unit 4 for transmitting / receiving radio waves of radio communication, a telephone control unit 3 for controlling radio communication performed through the radio transmission / reception unit 4, and a power supply for each unit of the portable terminal device. The system includes a battery 6 to be supplied, a voltage detecting unit 5 for detecting a voltage of the battery 6, and a CPU 2 for controlling each unit of the portable terminal device. The CPU 2 controls an I / O device 1 for various I / O devices. It comprises a unit 21, an incoming call holding unit 23 for controlling the timing of an incoming call response when there is an incoming call, and a main control unit 22 for controlling the whole.

In this portable terminal device, when the activation of the I / O device 1 and the incoming call overlap, as shown in FIG.
After the high-load operation of the O device 1 is completed, a radio wave of an incoming call response is transmitted. In the case of a scanner or IrDA, the high-load operation time is often 1 second or less, and at most about 1 or 2 seconds. For an incoming call, the system waits for an incoming response for this time.

FIG. 3 shows a time chart of the portable terminal device.

When the operator selects an I / O device through an operation unit (not shown), the main control unit 22 controls the I / O control unit.
Instruct 21 to start the selected I / O device 1. At this time, the main control unit 22 instructs the incoming call holding unit 23 to prohibit the incoming call response.

When receiving the notification of the incoming call from the network, the radio wave transmitting / receiving unit 4 transmits the notification to the telephone control unit 3 and the telephone control unit 3
Is transmitted to the incoming call holding unit 23.

At this time, the incoming call holding unit 23 includes a main control unit.
If no incoming call prohibition command has been issued from 22, the incoming call response is given to the telephone control unit 3. In response to this, the telephone control unit 3 sends out an incoming call response radio wave through the radio wave transmission / reception unit 4. If the main control unit 22 has issued an incoming response prohibition command, the incoming call response is suspended. I
When the operation of the I / O device 1 is stopped, the I / O control unit 21 informs the main control unit 22 of the fact, and the main control unit 22
In response to this, instructs the incoming call holding unit 23 to release the inhibition of the incoming call response. When the incoming call holding unit 23 receives the incoming call answering prohibition release command and holds the incoming call answering permission, it immediately gives the telephone control unit 3 the incoming call answering permission.
Performs radio wave transmission of an incoming call response through the radio wave transmission / reception unit 4.

As a result, as shown in FIG. 2, even when the activation of the I / O device 1 and the incoming call overlap, the radio wave transmission of the incoming call response is performed after the high load operation of the I / O device ends. As a result, the superposition of the peak current is avoided, and the situation where the voltage level of the battery falls below the threshold value is also avoided.

The voltage detector 5 outputs an interrupt signal to the main controller 22 when the voltage level of the battery 6 falls below the threshold, similarly to the conventional device, and the main controller 22 controls the operation of each unit. In this portable terminal device, the battery voltage level of the portable terminal device is set to a threshold value due to a voltage drop when the I / O device 1 is activated alone or a voltage drop when the radio wave for response to the incoming call is transmitted alone. No interrupt signal is output from the voltage detection unit 5 until the time reaches.

Therefore, in this portable terminal device, it is possible to continue using the battery until the remaining amount of the battery becomes smaller as compared with the conventional device, thereby increasing the use efficiency of the battery and extending the battery life. it can.

(Second Embodiment) In the second embodiment,
A description will be given of an incoming call response when an I / O device having an operation time of several seconds is included in the I / O device of the portable terminal device.

This portable terminal device, as shown in FIG.
The main control unit 22 includes a timer 24. When the activation of the I / O device 1 and the incoming call overlap, if the operation of the I / O device 1 does not end within a predetermined time from the incoming call, the main control unit 22 The device 1 is forcibly terminated. Other configurations are the same as those of the first embodiment (FIG. 1).

When the operator selects an I / O device through an operation unit (not shown), the main control unit 22 controls the I / O control unit.
Instruct 21 to start the selected I / O device 1. At this time, the main control unit 22 instructs the incoming call holding unit 23 to prohibit the incoming call response.

When receiving the notification of the incoming call from the network, the radio wave transmitting / receiving unit 4 transmits the notification to the telephone control unit 3 and the telephone control unit 3
Is transmitted to the incoming call holding unit 23. The incoming call holding unit 23, when the prohibition command of the incoming call response is not issued from the main control unit 22,
The incoming call response permission is given to the telephone control unit 3, and in response, the telephone control unit 3 transmits a radio wave of the incoming call response through the radio wave transmitting / receiving unit 4.

On the other hand, when an incoming call prohibition command has been issued from the main control unit 22, the incoming call holding unit 23 holds the incoming call response permission to the telephone control unit 3 and at the same time holds the main control unit.
22 is notified that there is an incoming call.

When the main control unit 22 receives the notification of the incoming call from the incoming call holding unit 23, it activates the timer 24. Then, before the timer 24 measures a predetermined time (for example, 2 seconds), the I / O
When the notification of the operation stop of the I / O device 1 is received from the control unit 21, the control unit 21 instructs the incoming call holding unit 23 to release the inhibition of the incoming call response. The incoming call holding unit 23 that has received the prohibition release instruction of the incoming call response,
Immediately, the incoming call response is given to the telephone control unit 3, and the telephone control unit 3 transmits the incoming call radio wave through the radio wave transmitting / receiving unit 4.

Further, even if the timer 24 measures a predetermined time,
When the notification of the operation stop of the I / O device 1 has not been received from the I / O control unit 21, the main control unit 22
Instructs the I / O device 21 to forcibly terminate the I / O device 1 and instructs the incoming call holding unit 23 to release the inhibition of the incoming call response. The I / O control unit 21 that has received the forced termination command controls the forced termination of the I / O device 1. Permission is given, and the telephone control unit 3 transmits a radio wave of the incoming call response through the radio wave transmitting / receiving unit 4.

As described above, in this portable terminal device, the first
Similarly to the embodiment, even when the activation of the I / O device 1 and the incoming call overlap, it is possible to avoid the superposition of the peak current, increase the use efficiency of the battery, and extend the battery life. This can prevent a significant delay in incoming call response.

The present invention can be applied to a portable terminal device using a rechargeable battery such as a dry battery or a lithium ion secondary battery, and is particularly suitable for a portable terminal device using a dry battery having a high internal resistance.

[0035]

As is clear from the above description, the portable terminal device of the present invention can avoid the superposition of the peak current even when the activation of the I / O device and the incoming call of the radio communication overlap. . Therefore, it is possible to set the use limit level of the battery voltage low, to increase the use efficiency of the battery,
Battery life can be extended.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a change in battery voltage in the portable terminal device according to the first embodiment;

FIG. 3 is a time chart illustrating an operation of the mobile terminal device according to the first embodiment;

FIG. 4 is a block diagram showing a configuration of a mobile terminal device according to a second embodiment of the present invention;

FIG. 5 is a block diagram showing a configuration of a conventional mobile terminal device;

FIG. 6 is a diagram showing a change in battery voltage in a conventional portable terminal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Various I / O devices 2 CPU 3 Telephone control part 4 Radio wave transmission / reception part 5 Voltage detection part 6 Battery 21 I / O control part 22 Main control part 23 Reception hold part 24 Timer

Claims (5)

[Claims] 1. A portable terminal device that is provided with various I / O devices and wireless communication means and is driven by a battery, wherein an incoming call is received by the wireless communication means during operation of the I / O device. A portable terminal device comprising a call holding means for holding an incoming call response until the operation of the I / O device is completed. 2. An apparatus according to claim 1, further comprising an I / O control unit for forcibly terminating the operation of the I / O device within a predetermined time when the incoming call holding unit holds an incoming call response. The portable terminal device according to the above. 3. The portable terminal device according to claim 1, wherein the battery is a dry battery. 4. A method of responding to an incoming call of a portable terminal device driven by a battery, comprising various I / O devices and a wireless communication unit, wherein an incoming call is received by the wireless communication unit during operation of the I / O device. An incoming call response method for a portable terminal device, characterized in that when there is, an end response radio wave is transmitted after the end of the operation of the I / O device. 5. When there is an incoming call to the wireless communication means during the operation of the I / O device, the operation of the I / O device is forcibly terminated for a predetermined time, and after the forcible termination, the incoming call is terminated. 5. The method according to claim 4, wherein a response radio wave is transmitted.