JPH09331290A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a talking interruption by comparing an already designated first transmission power level with a second transmission power level designated from a transmission power level designating section by means of a designated level comparator and deciding the transmission power based on the result of the comparison. SOLUTION: A transmission power level designating section 10 sends the level designated from a base station to a designated level comparator 9. The comparator 9 compares the new power level with an already set transmission power level. When the new level is higher than the already designated level, the comparator 9 sends a set transmission power level to an ALC section so that the set level can become the highest within the specification of the new designated transmission power level. When the new level is lower than the already set level, on the contrary, the comparator 9 sends a set transmission power level to the ALC section 8 so that the set level can become the lowest within the specification of the new designated transmission power level.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mobile phone,
In particular, the present invention relates to a mobile phone having a function of controlling the transmission power level.

[0002]

2. Description of the Related Art A conventional portable telephone of this type will be described with reference to the drawings.

FIG. 3 is a block diagram showing an example of a conventional mobile phone.

In FIG. 3, this conventional mobile phone has a receiving section 103 for receiving a signal from a base station (not shown) via an antenna 101 and a duplexer 102, and a power amplifier 106 for amplifying the power of a transmission signal. And Auto LevelCon for controlling the transmission output level of the power amplifier 106.
and a transmission power level designation unit 10 that controls the ALC unit 105 according to a designated transmission power level (transmission output level) transmitted from the base station.
4 and the conventional mobile phone has a power amplifier 106
The transmission output level and the transmission power of the ALC unit 10 are set according to the specified transmission output level and the transmission power transmitted from the base station.
It was decided by the control of 5.

Usually, the base station determines the transmission power level based on the magnitude of the call monitoring signal and the reception power (transmission power when viewed from the mobile phone) and the change information such as the reception field strength (RSSI) and the reception data error rate of the mobile phone. Designation (or call channel change) is being implemented.

[0006]

Since the transmission output level and the transmission power of this conventional mobile phone are determined by the designation of the base station, the transmission power to the mobile phone is deteriorated when the reception condition of the base station deteriorates. Although the level is changed, there was a problem that the specified power level was not appropriate and was too small, and the call was disconnected. On the contrary, although the base station is in a good reception state, the designated power level is too high, so that the current consumption of the internal battery is wasted.

An object of the present invention is to set the new designated transmission power level to the maximum value within each designated power standard when changing the transmission power level to the mobile phone due to deterioration of the reception state of the base station. By obtaining a sufficient reception status of the base station, it prevents call disconnection and provides a stable call, and conversely, because the reception status of the base station is sufficient, the transmission power to the mobile phone implemented by the base station When changing the level, the new specified transmission power level is set to the minimum value within each specified power standard, which reduces the current consumption of the internal battery and extends the call and standby time. To provide a telephone.

[0008]

The mobile phone of the present invention comprises:
A power amplifier for amplifying a transmission signal, an automatic level control unit for controlling output power of the power amplifier, a transmission power level designating unit for transmitting a designated transmission power level from the base station to the automatic level control unit, Equipped with a level comparator,
The designated level comparator makes a first comparison between the already designated first transmission power level and the second transmission power level from the transmission power level designating unit, and first and second by the first comparison. Based on the magnitude of the transmission power level of, the newly specified transmission power level is determined to the minimum value or the maximum value within the standard specified in advance and transmitted to the automatic level control section, or the specified level comparator. Detects the received electric field strength of the received signal from the base station, performs a second comparison between the detected voltage and a preset reference voltage, and compares the level of the first comparison with the level. Based on the result of the second comparison, the newly designated transmission power level is determined to be the minimum value or the maximum value within the standard and transmitted to the automatic level control unit.

The mobile phone of the present invention receives an R signal which is input from the antenna and which is transmitted from the base station via the distributor.
An F circuit, an IF circuit for outputting a signal converted to an intermediate frequency from an output from the RF circuit and an output from a local oscillator configured by a built-in PLL synthesizer, and detection for detecting the signal converted to the intermediate frequency , A transmission power level designating unit for setting a transmission power level designated by the base station in the received signal based on the detection signal of the detector, and the first transmitting unit that has already transmitted to the automatic level control unit. The transmission power level of 1 is compared with the second transmission power level newly transmitted from the transmission power level designating unit, and a new value is set next according to the minimum or maximum value of the standard specified in advance. A designated level comparator for transmitting a third transmission power level to be transmitted to the automatic level control unit; and a power amplifier for controlling the power amplifier so as to have the third transmission power level to be newly set next. And the dynamic level control unit, and a signal to be transmitted via the distributor antenna to the base station and a said power amplifier and transmits the amplified to the third transmission power levels.

The mobile phone according to the present invention receives the signal R input from the antenna and transmitted from the base station via the distributor.
An F circuit, an IF circuit for outputting a signal converted to an intermediate frequency from an output from the RF circuit and an output from a local oscillator configured by a built-in PLL synthesizer, and detection for detecting the signal converted to the intermediate frequency And a transmission power level designating unit for setting a transmission power level designated by the base station in the received signal based on the detection signal of the detector, and a voltage corresponding to the output signal amplitude of the IF circuit. A reception electric field strength detector for outputting, a reference voltage generator for generating a preset reference voltage, an output voltage of the reception electric field strength detector, the reference voltage from the reference voltage generator, and the transmission power level designation A specified level comparator for comparing with a specified transmission power level from the unit to determine a new transmission power level and transmitting it to the automatic level control unit; In the automatic level control unit for controlling the power amplifier, and the power amplifier for amplifying and transmitting the signal to be transmitted to the base station via the distributor and the antenna to the new transmission power level, The designated level comparator has a designated first transmission power level lower than a second transmission power level from the transmission power level designating unit, and an output voltage of the reception field strength detector from the reference voltage. If it is lower, the new latest power level is sent to the automatic level control unit according to a maximum value within a preset standard, and the first transmission power level exceeds the second transmission power level, In addition, when the output voltage of the reception electric field strength detector exceeds the reference voltage, the automatic transmission level control is performed so that the new transmission power level becomes the maximum value within the preset standard. And it sends it to the department.

[0011]

Next, the present invention will be described with reference to the drawings.

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

In FIG. 1, in the first embodiment, an RF circuit 3 for receiving a transmission signal input from an antenna 1 and transmitted from a base station (not shown) via a distributor 2, and an RF circuit 3 from the RF circuit 3. An IF circuit 4 for outputting a signal converted to an intermediate frequency from an output and an output from a local oscillator (not shown) configured by a built-in PLL synthesizer, a detector 6 for detecting the signal converted to the intermediate frequency, A transmission power level designating unit 10 for setting the transmission power level designated by the base station in the received signal based on the detection signal of the detector 6.
And the transmission power level already transmitted to the automatic level control unit (ALC unit) 8 and the transmission power level newly transmitted from the transmission power level designating unit 16 are compared with each other. A designated level comparator 9 for transmitting a designated transmission power level to be newly set to the ALC unit 8 according to the minimum value or the maximum value, and an ALC for controlling the power amplifier 7 so that the designated power level is newly set. Part 8 and
It has a demultiplexer 2 and a power amplifier 7 for amplifying a signal to be transmitted to the base station via the antenna 1.

Next, the operation of setting the transmission power level according to the first embodiment will be described with reference to FIG.

Usually, during a call, the base station changes the transmission power level to the mobile phone depending on the reception state (for example, the magnitude of the received power and the error rate of the call monitoring signal). In that case, the transmission power level designating section 10 sends the level designated by the base station to the designated level comparator 9.

The designated level comparator 9 compares the new designated transmission power level with the already set transmission power level, and if the new designated transmission power level exceeds the already designated transmission power level, ALC is performed. The set transmission power level is sent to the unit 8 so as to be the maximum value within the standard at the new designated transmission power level.

On the contrary, the designated level comparator 9 compares the new designated transmission power level with the already set transmission power level, and when the new designated transmission power level is lower than the already designated transmission power level. Sends the set transmission power to the ALC unit 8 so as to be the minimum value within the standard at the new designated transmission power level.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

In FIG. 2, in the second embodiment, the same constituent elements as those in the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the difference lies in the output signal amplitude in the IF circuit 4. Received field strength detector 5 that outputs a corresponding voltage
A reference voltage generator 11 for generating a preset reference voltage, an output voltage of the reception electric field strength detector 5, a reference voltage from the reference voltage generator 11, and a new designated transmission from the transmission power level designation unit 10. A designated level comparator 9 that compares the transmission power level with the power level and transmits the designated transmission power to be newly set to the ALC unit 8
a and.

Next, the setting operation with the transmission power level according to the second embodiment will be described with reference to FIG.

[0021] Normally, during a call, the base station changes the transmission power level to the mobile phone according to its reception state (for example, the magnitude of the received power and the error rate of the call monitoring signal). At that time, the transmission power level designating unit 10 sends the level designated by the base station to the designated level comparator 9a.

The designated level comparator 9a compares the new designated transmission power level with the already set transmission power level, and the new designated transmission power level exceeds the already designated transmission power level and the received electric field strength is higher. If the output voltage of the detector 5 is lower than the output voltage of the reference voltage generator 11, A
The set transmission power level is sent to the LC unit 8 so as to be the maximum value within the standard at the new designated transmission power level.

On the contrary, the designated level comparator 9a compares the new designated transmission power level with the already set transmission power level, and the new designated transmission power level is lower than the already designated transmission power level, and When the output voltage of the received electric field strength detector 5 exceeds the output voltage of the reference voltage generator 11, the ALC unit 8 sets its set transmission power to the minimum value within the standard at the new designated transmission power level. To send.

The expression "within the standard" used in the first and second embodiments means that the preset standard upper limit value and lower limit value of the system standard transmission power level at each designated transmission power level. It is used to mean inside.

[0025]

As described above, according to the present invention, the power amplifier for amplifying the transmission signal, the automatic level control unit for controlling the output power of the power amplifier, and the automatic transmission power level designated by the base station are automatically set. A transmission power level designating unit for transmitting to the control unit and a designated level comparator are provided, and the designated level comparator is configured to compare the already designated first transmission power level and the second transmission power level from the transmission power level designating unit. The first comparison is performed, and the newly designated transmission power level is determined to be the minimum value or the maximum value within the standard specified in advance based on the magnitude of the first and second transmission power levels obtained by the first comparison. To the automatic level control unit, or the designated level comparator detects the received electric field strength of the received signal from the base station and performs a second comparison between the detected voltage and a preset reference voltage. To the first comparison The output power of the transmission signal is too small by determining the newly specified transmission power level to the minimum value or the maximum value within the standard based on the magnitude of the level and the result of the second comparison and transmitting it to the automatic level control unit. Since it prevents the call from being cut off due to the reason, there is an effect that a stable call can be provided.

Further, since the consumption current consumption caused by the maximum output power of the transmission signal is prevented from being wasted, the standby time and the call time can be made longer than before.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing an example of a conventional mobile phone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 antenna 2 duplexer 3 RF circuit 4 IF circuit 5 reception electric field strength detector 6 detector 7 power amplifier 8 automatic level control (ALC) section 9, 9a designated level comparator 10 transmission power level designation section 11 reference voltage generator

Claims (5)

[Claims] 1. A power amplifier for amplifying a transmission signal, and an automatic level control unit for controlling output power of the power amplifier,
A transmission power level designating unit for transmitting a designated transmission power level from the base station to the automatic level control unit, and a designated level comparator, wherein the designated level comparator and the already designated first transmission power level The first comparison with the second transmission power level from the transmission power level designating unit is performed, and the first comparison is made based on the magnitude of the first and second transmission power levels according to the first comparison. A mobile phone characterized in that a newly designated transmission power level is determined to be a minimum value or a maximum value and is transmitted to the automatic level control unit. 2. The specified level comparator detects a received electric field strength of a received signal from the base station, performs a second comparison between the detected detection voltage and a preset reference voltage, The new designated transmission power level is determined to be the minimum value or the maximum value within the standard based on the magnitude of the level by the first comparison and the result of the second comparison, and the value is transmitted to the automatic level control unit. The mobile phone according to claim 1. 3. An intermediate frequency from an RF circuit that receives a transmission signal from a base station that is input from an antenna and that passes through a distributor, and an output from the RF circuit and an output from a local oscillator configured by a built-in PLL synthesizer. An IF circuit for outputting a signal converted into a signal, a detector for detecting the signal converted to the intermediate frequency, and a specified transmission from the base station in the received signal based on the detection signal of the detector The transmission power level designating unit for setting the power level, the first transmission power level already sent to the automatic level control unit, and the second transmission power level newly transmitted from the transmission power level designating unit. And a designated level comparator for transmitting a third transmission power level to be newly set next to the automatic level control unit according to a minimum value or a maximum value of a standard defined in advance, Next, the automatic level control unit for controlling the power amplifier so as to reach the third transmission power level to be newly set, and the signal to be transmitted to the base station via the distributor antenna, A portable wireless device comprising: the power amplifier that amplifies to a transmission power level and transmits. 4. An intermediate frequency from an RF circuit that receives a transmission signal from a base station that is input from an antenna and that passes through a distributor, and an output from this RF circuit and an output from a local oscillator configured by a built-in PLL synthesizer. IF circuit for outputting a signal converted into a signal, a detector for detecting the signal converted to the intermediate frequency, and a transmission power specified by the base station in the received signal based on the detection signal of the detector A transmission power level designating unit for setting a level, a reception electric field strength detector for outputting a voltage corresponding to the output signal amplitude of the IF circuit, a reference voltage generator for generating a preset reference voltage, and the reception electric field The output voltage of the intensity detector is compared with the reference voltage from the reference voltage generator and the transmission power level designated by the transmission power level designating unit to perform a new transmission power level comparison. A designated level comparator for determining a bell and transmitting it to the automatic level control unit, the automatic level control unit for controlling a power amplifier at the new transmission power level, and the base station should be transmitted via the distributor and the antenna. And a power amplifier for amplifying a signal to the new transmission power level and transmitting the amplified power. 5. The designated level comparator has a first transmission power level already designated lower than a second transmission power level from the transmission power level designating unit, and an output voltage of the reception field strength detector. Is lower than the reference voltage, the new transmission power level is sent to the automatic level control unit according to a maximum value within a preset standard, and the first transmission power level is set to the second transmission level. To the automatic level control unit so that the new transmission power level becomes the minimum value within the preset standard when the power level is exceeded and the output voltage of the reception field strength detector exceeds the reference voltage. The portable wireless device according to claim 4, wherein the portable wireless device transmits the signal.