JPH10215529A - Portable radio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guarantee data transmission having large load current, until a battery alarm which is incapable of receiving small data of battery load current is outputted. SOLUTION: Supply current value to a transmission section 31 is monitored by a battery supply monitor section 50, and it is compared with the required current value stored in a storage section 40 in advance, and voltage of a battery 10 is decided. In the case that the supply value is less than the required current value, it is notified to a battery voltage switching section 70 that battery voltage is not sufficient, a power supply source to the transmission section 31 is switched to a power supplement section 60 for a certain time only in data transmission, the supply voltage supplied to the transmission section 31 is raised, and required supply current (power) is ensured. By the constitution, a battery voltage level sufficient for a battery alarm (incapable of receiving date) can be made to coincide with a battery voltage level which becomes incapable of transmitting data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable wireless device, and more particularly to a portable wireless device having a transmitting unit and a receiving unit for receiving data from a battery and transmitting and receiving data to and from a partner device wirelessly. The present invention relates to a portable wireless device which mainly employs a press talk system for business use.

[0002]

2. Description of the Related Art With the spread of portable information devices in recent years and the growing demand for data transmission functions between portable information terminals, etc.,
The need for data communication in portable wireless devices that mainly use the press-talk system, such as business wireless, is increasing.

Conventionally, in data transmission using this kind of portable wireless device, even if the remaining capacity of a power supply battery (battery) that does not hinder the data reception is transmitted, the data transmission of the wireless transmission unit is performed. Due to the large current drive, the battery voltage drops momentarily, so that the drive current required for data transmission cannot be secured, and data transmission may not be possible in some cases.
In addition, in the case of a voltage drop at the time of transmission, a device is devised so that a battery alarm does not sound, so that the user cannot recognize that transmission is impossible due to a drop in the battery voltage.

[0004]

In such a conventional portable wireless device, a momentary battery voltage drop due to data transmission and a total (at the time of data reception) battery voltage drop are identified, and a battery alarm is sounded. If data transmission is disabled due to a momentary voltage drop due to data transmission, the user cannot recognize this as a phenomenon caused by a decrease in battery capacity, and useless transmission without replacing the battery This not only makes it impossible to receive a desired data transmission service, but also worsens the line occupancy of the system. Thus, the battery alarm function of a portable device using a battery as a power source has become meaningless.

SUMMARY OF THE INVENTION It is an object of the present invention to provide means for compensating for a battery voltage drop in which only data transmission becomes impossible, thereby making a battery alarm of a portable terminal coincide with a battery voltage level in which data cannot be transmitted and received. An object of the present invention is to provide a portable wireless device capable of transmitting and receiving data until an alarm is output.

[0006]

SUMMARY OF THE INVENTION A portable wireless device according to the present invention includes a transmitting unit and a receiving unit that receive power supply from a battery and transmit and receive data to and from an opposite device wirelessly. A portable wireless device having
The supply voltage decreases with the decrease in the remaining capacity of the battery, and despite the fact that data can be received by the receiving unit, the supply voltage of the battery further decreases due to an increase in the current load during data transmission by the transmission unit. There is provided voltage compensation means for compensating for a decrease in the supply voltage of the battery for relieving that data transmission becomes impossible.

In the above configuration, the power supply current value required for the transmission means to perform data transmission normally is stored in advance and compared with the power supply current value at the time of actual data transmission, whereby the battery It is determined whether or not the supply voltage is at a level at which data can be transmitted, and based on the determination result, a battery supply current monitoring means for instructing execution or non-execution of the supply voltage compensation of the battery by the voltage compensation means. be able to.

[0008] Further, a momentary drop in the supply voltage of the battery due to data transmission and a total drop in the supply voltage of the battery including data reception are identified, and a battery alarm indicating only the total supply voltage drop is output. By using the battery alarm detecting means to make up for the momentary drop in the supply voltage of the battery at the time of data transmission by the voltage compensating means, it is impossible to perform both data transmission and data reception for the first time at the time of output of the battery alarm. It can be configured to indicate that no longer exists.

[0009] According to the present invention, the battery voltage that only data transmission becomes impossible is grasped in advance, and the battery voltage is compensated only at the time of transmission in advance, so that the battery alarm that is indicated by the total battery capacity drop is output. Until then, reliable data transmission is guaranteed.

[0010]

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

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, the portable wireless device of the present example is a battery (battery) that supplies power to the entire wireless device.
10, a control unit 20 for controlling the entire wireless device, a wireless unit 30 having a transmitting unit 31 and a receiving unit 32 for wirelessly transmitting and receiving data, and a transmitting unit 3 required for data transmission.
And a storage unit 40 for storing the drive current value of the battery 1
The current value supplied from 0 to the transmission unit 31 is monitored and the storage unit 4
A battery supply current monitoring unit 50 that determines whether data transmission is possible by comparing with a required current value stored in 0 and a battery 10
And a battery voltage compensating unit 60 for compensating for a voltage drop when the current load of the battery 10 increases.
A battery voltage switching unit 70 that switches the power supply source to the battery voltage compensation unit 60 based on information from the battery supply current monitoring unit 50 when the current load of the battery increases and the battery voltage temporarily falls below a required value; A battery alarm detecting unit 80 which prevents the temporary voltage drop of the battery 10 due to the data transmission 31 from being mistaken for the battery alarm level at the time of non-transmission.
And an I / F (interface) circuit section 90 for enabling connection to an external data buffer (not shown) for inputting / outputting transmission / reception data.

In order to realize the voltage compensating function in the battery voltage compensating section 60, a sub-battery can be used, or a capacitor or a charging ground which receives the charge from the battery 10 during non-transmission can be used.

Next, the operation will be described. Portable wireless devices
At the time of data transmission, power is supplied from the battery 10 to the transmission unit 31 of the wireless unit 30. Under the control of the control unit 20, the battery supply current monitoring unit 50 monitors the supply current to the transmission unit 31 and stores the current value in the transmission unit 3 stored in the storage unit 40 in advance.
It is compared with the minimum current value (required current value) that guarantees the data transmission function of No. 1 to determine whether or not the battery voltage needs to be compensated. That is, if the supply current value is equal to or more than the required current value, the battery voltage is sufficient and there is no need to compensate.If the supply current value is less than the required current value, the battery voltage is insufficient and needs to be compensated. This is notified to the battery voltage switching unit 70. Upon receiving the notification that the battery voltage is insufficient, the battery voltage switching unit 70 transmits the data to the transmitting unit 3 only during a certain period of data transmission.
By switching the power supply source to 1 to the battery voltage compensation unit 60 side, the power supply voltage supplied to the transmission unit 31 is increased,
Secure necessary supply current (power). If the voltage value output from the battery voltage compensation unit 60 is a value sufficient to compensate for the voltage drop of the battery 10, the battery voltage switching unit 70
The output voltage of the battery voltage compensating unit 60 is added to the output voltage of the battery 10 so as to be supplied to the transmitting unit 31. The voltage switching unit 70 can supply the output voltage of the battery voltage compensation unit 60 to the transmission unit 31.

In a wireless communication system in which transmission retry is performed at most n times, when the battery voltage level of a conventional portable wireless device has reached a transmission impossible level, n transmissions are always performed. The portable wireless device of the above can be transmitted by one transmission by the above-mentioned battery voltage compensation means, so that there is an effect of reducing the line occupancy to 1 / n times.

Further, since the battery voltage level at which a battery alarm (data cannot be received) by the battery alarm detection unit 80 matches the battery voltage level at which data cannot be transmitted, a battery alarm output (display on a display unit or speaker For the first time, the user can be notified and recognized that both data transmission and reception have been disabled due to the consumption of the battery voltage.

[0016]

As described above, the portable wireless device of the present invention is provided with a means for compensating for a decrease in the battery voltage during data transmission. Since the battery voltage is compensated only at the time, reliable data transmission is guaranteed until a battery alarm is output, which indicates a reduction in the total battery capacity. This allows
When used in a wireless communication system that performs a maximum of n transmission retries, if the battery voltage level has reached a non-transmission level, the conventional technique always performs data transmission by one transmission as compared with n transmissions. Transmission is possible and there is a moderating effect that the line occupation ratio becomes 1 / n times.

Also, since the battery voltage level at which the battery alarm indicating the total function impairment including the data reception is disabled by the battery alarm detection means coincides with the battery voltage level at which the data transmission is disabled, the battery alarm is displayed simultaneously with the battery alarm display. The user can recognize that the data transmission is disabled due to the consumption of the voltage.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Battery 20 Control part 30 Radio part 31 Transmission part 40 Storage part 50 Battery supply current monitoring part 60 Battery voltage compensation part 70 Battery voltage switching part 80 Battery alarm detection part

Claims (3)

[Claims] 1. A portable wireless device having transmitting means and receiving means for receiving data supplied from a battery and transmitting and receiving data to and from an opposite device wirelessly, respectively, wherein the remaining capacity of the battery is reduced. The supply voltage decreases with, and, despite the fact that data can be received by the receiving means, data transmission is impossible due to a further decrease in the supply voltage of the battery due to an increase in current load during data transmission by the transmission means. A portable wireless device comprising voltage compensation means for compensating for a decrease in the supply voltage of the battery in order to remedy the situation. 2. A power supply current value required for the transmission means to perform data transmission normally is stored in advance and compared with a supply current value at the time of actual data transmission, so that the supply voltage of the battery is reduced. Determine whether the level is capable of sending data,
2. The portable wireless device according to claim 1, further comprising a battery supply current monitoring unit for instructing execution or non-execution of the supply voltage compensation of the battery by the voltage compensation unit based on the determination result. 3. Distinguishing between an instantaneous drop in the supply voltage of the battery due to data transmission and a total drop in the supply voltage of the battery including data reception, and outputting a battery alarm indicating only the total drop in the supply voltage. While using the battery alarm detection means, by compensating for a momentary drop in the supply voltage of the battery at the time of data transmission by the voltage compensation means, both data transmission and data reception become impossible only at the time of the battery alarm output. The portable wireless device according to claim 1 or 2, wherein the portable wireless device is configured to indicate that the portable wireless device has been activated.