JP2021061623A - Upper limit fixed communication device - Google Patents

Abstract

To provide a wireless transceiver whose power consumption is reduced by controlling an upper limit value of transmission power by intention of a user or the like and that can extend a continuous operation time.SOLUTION: A wireless transceiver including an antenna 111, a receiving unit 410, a transmitting unit 470, a control signal generation unit 450, and storage means 114 fixes an upper limit value of transmission power to a value lower than maximum transmission power by fixed information of the storage means 114 and fixes reception sensitivity to a value lower than maximum reception sensitivity according to the fixed upper limit value of transmission power. Thereby, power consumption is reduced by controlling the upper limit value of transmission power by intention of a user or the like, and a continuous operation time can be extended. An impact of a radio frequency electromagnetic field on a human body can be weakened.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wireless transmitter / receiver, and more particularly to a technique for controlling transmission power of the wireless transmitter / receiver.

In recent years, wireless terminals (hereinafter referred to as wireless terminals) in mobile communication systems, such as mobile phones that use batteries as power sources and mobile PCs with built-in communication devices, have become widespread, making full use of various power-saving technologies. Technological development is being carried out to extend the continuous operation time as much as possible.

On the other hand, looking at the breakdown of the power consumption of wireless terminals, the ratio related to transmission is large. The transmission power is determined based on the signal strength and quality of the received signal received from the radio base station (hereinafter referred to as the radio base station) in the mobile communication system in the conventional wireless terminal.

As an example of the prior art, the technique described in Patent Document 1 is a technique for measuring the strength of a received signal in wireless communication and determining the transmission power.

Japanese Unexamined Patent Publication No. 07-226710

However, conventional wireless terminals cannot control transmission power intentionally by users (including users, guardians, managers, manufacturers, sellers, and telecommunications carriers; the same applies hereinafter). When the power is turned on, the transmission power cannot be reduced in order to reduce the power consumption by the user or the like. For this reason, in an environment where radio waves from wireless base stations are difficult to reach, the wireless terminal transmits at maximum output, which consumes power contrary to the expectations of users and is one of the causes of shortening the continuous operation time. It was one.

An object of the present invention is to provide a wireless transmitter / receiver capable of suppressing unintended power consumption and extending continuous operation time by intentionally suppressing transmission power by a user or the like.

The radio wave radiated from the wireless base station with the predetermined transmission power receives the propagation loss on the path to reception and is received by the wireless terminal.

Similarly, the radio wave radiated from the wireless terminal also receives the same amount of loss as the propagation loss on the path to reception and is received by the wireless base station. In this way, the amount of propagation loss on the transmitting side and the receiving side is equal, so the communication is symmetrical.

Normally, the maximum transmission power of a wireless base station and a wireless terminal is different. Even if the transmission output of the wireless base station and the wireless terminal are different, the system is designed so that "communication symmetry" is maintained in consideration of the characteristics of the antenna and the noise figure of the receiving unit.

Here, if only the transmission power of the wireless terminal is reduced, the signal received by the wireless base station becomes weak and the "communication symmetry" cannot be established. In this state, in order to maintain the "communication symmetry" only on the wireless terminal side, the reception sensitivity may be lowered to match the transmission power lowered by the wireless terminal.

An object of the present invention is to ensure "communication symmetry" and to suppress the upper limit value of transmission power by the intention of the user or the like.

[Invention 1] In order to achieve the above object, the wireless transmitter / receiver according to the first invention includes a transmission power fixing means for fixing an upper limit value of transmission power to a value lower than the maximum upper limit value, and the fixed upper limit value of transmission power. It is provided with a reception performance fixing means for fixing the reception performance to a value lower than the maximum upper limit value according to the above.

In such a configuration, since the transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value is provided, the upper limit value of the transmission power is suppressed by the intention of the user or the like to consume power. The effect is obtained that the continuous operation time can be extended. Further, since the reception performance fixing means for fixing the reception performance to a value lower than the maximum upper limit value is provided, the effect that the degree of "communication symmetry" being broken can be reduced can be obtained.

Here, the maximum transmission power value is required when the maximum value of the transmission power that can be realized by the wireless transmitter / receiver in terms of performance or the communication quality with the communication partner (for example, a wireless base station) is the minimum. The maximum transmission power according to the standard. Hereinafter, the same applies to the wireless transmitters / receivers of Inventions 2 to 4.

The maximum upper limit of reception performance is required when the maximum value of reception performance that can be realized by the wireless transmitter / receiver or when the communication quality with the communication partner (for example, a wireless base station) is the minimum. The maximum reception performance according to the standard. Hereinafter, the same applies to the wireless transmitters / receivers of Inventions 2 to 4.

[Invention 2] Further, in the wireless transmitter / receiver of the invention 2, the reception performance fixing means for fixing the reception performance to a value lower than the maximum upper limit value and the upper limit value of the transmission power according to the fixed reception performance are set to the maximum upper limit value. It is provided with a transmission power fixing means for fixing to a value lower than.

In such a configuration, since the transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value is provided, the upper limit value of the transmission power is suppressed by the intention of the user or the like to consume power. The effect is obtained that the continuous operation time can be extended. Further, since the reception performance fixing means for fixing the reception performance to a value lower than the maximum upper limit value is provided, the effect that the degree of "communication symmetry" being broken can be reduced can be obtained.

[Invention 3] Further, the wireless transmitter / receiver according to the invention 3 has a transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value, and a reception performance according to the fixed upper limit value of the transmission power. It is provided with a reception status notification means for notifying the communication partner of the reception status when the value is fixed to a value lower than the maximum upper limit value or when the value is fixed.

In such a configuration, since the transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value is provided, the upper limit value of the transmission power is suppressed by the intention of the user or the like to consume power. The effect is obtained that the continuous operation time can be extended. Further, since it is provided with a reception status notification means for notifying the communication partner of the reception status when the reception performance is fixed to a value lower than the maximum upper limit value or when the reception performance is fixed according to the fixed upper limit value of the transmission power, for example. If the communication partner controls the transmission power or the like based on the reception status of the wireless transmitter / receiver, the effect that the "communication symmetry" is broken can be reduced.

Here, the communication partner includes, for example, a wireless base station. Hereinafter, the same applies to the wireless transmitters / receivers of the inventions 4, 12, 21, 22, 26 to 28 and 33.

[Invention 4] Further, the wireless transmitter / receiver according to the invention 4 includes a reception status notification means for notifying the communication partner of the reception status when the reception performance is fixed to a value lower than the maximum upper limit value or when the reception performance is fixed to a value lower than the maximum upper limit value. It is provided with a transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value according to the reception performance when it is fixed or when it is fixed.

In such a configuration, since the transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value is provided, the upper limit value of the transmission power is suppressed by the intention of the user or the like to consume power. The effect is obtained that the continuous operation time can be extended. Further, since it is provided with a reception status notification means for notifying the communication partner of the reception status when the reception performance is fixed to a value lower than the maximum upper limit value or when the reception performance is fixed according to the fixed upper limit value of the transmission power, for example. If the communication partner controls the transmission power or the like based on the reception status of the wireless transmitter / receiver, the effect that the "communication symmetry" is broken can be reduced.

[Invention 5] Further, the wireless transmitter / receiver of the invention 5 stores fixed information indicating a value lower than the maximum upper limit value as a fixed value of the reception performance in the wireless transmitter / receiver of any one of the inventions 1 and 2. The receiving performance fixing means is provided with means, and the receiving performance is fixed based on the fixed information of the storage means.

[Invention 6] Further, the wireless transmitter / receiver of the invention 6 includes a setting means capable of setting whether or not to fix the wireless transmitter / receiver according to any one of the inventions 1, 2 and 5, and the reception performance fixing means is the above-mentioned. When fixed is set by the setting means, the reception performance is fixed.

[Invention 7] Further, the wireless transmitter / receiver of the invention 7 provides fixed information indicating a value lower than the maximum upper limit value as a fixed value of the upper limit value of the transmission power in the wireless transmitter / receiver of any one of the inventions 1 to 6. The storage means for storing is provided, and the transmission power fixing means fixes the upper limit value of the transmission power based on the fixed information of the storage means.

[Invention 8] Further, the wireless transmitter / receiver of the invention 8 includes a setting means capable of setting whether or not the wireless transmitter / receiver of any one of the inventions 1 to 7 can be fixed, and the transmission power fixing means is the setting means. When fixed is set in, the upper limit of transmission power is fixed.

[Invention 9] Further, in the wireless transmitter / receiver of the invention 9, the reception performance is the reception sensitivity in the wireless transmitter / receiver of any one of the inventions 1 to 8.

[Invention 10] Further, the wireless transmitter / receiver of the invention 10 is the wireless transmitter / receiver of any one of the inventions 1 to 8, and the reception performance is a reference value when it is determined that communication is established.

[Invention 11] Further, in the wireless transmitter / receiver according to the invention 11, in the wireless transmitter / receiver according to any one of the inventions 1 to 8, the reception performance is an allowable value of an error rate of received data.

[Invention 12] Further, the wireless transmitter / receiver of the invention 12 establishes communication with a communication partner in wireless transmission / reception stronger than the radio wave strength registered in advance depending on the reception performance in the wireless transmitter / receiver of any one of the inventions 1 to 11. ..

[Invention 13] Further, in the wireless transmitter / receiver of any one of the inventions 1 to 12, the wireless transmitter / receiver of the invention 13 simultaneously maximizes the upper limit value of the transmission power and the reception performance by the control signal generated by the fixed information. Return to the upper limit.

[Invention 14] Further, the wireless transmitter / receiver of the invention 14 has an upper limit of transmission power by a control signal generated by transmitting information from the outside and remotely controlling the wireless transmitter / receiver according to any one of the inventions 1 to 13. The value and reception performance are returned to the maximum upper limit at the same time.

[Invention 15] Further, the wireless transmitter / receiver of the invention 15 is a partner in information transmission registered in advance in the wireless transmitter / receiver of any one of the inventions 1 to 14 in a state where the upper limit value of the transmission power and the reception performance are lowered. When transmitting to the side, the upper limit of the transmission power is returned to the maximum upper limit.

[Invention 16] Further, the wireless transmitter / receiver of the invention 16 is a partner in information transmission registered in advance in the wireless transmitter / receiver of any one of the inventions 1 to 15 in a state where the upper limit value of the transmission power and the reception performance are lowered. When an incoming call arrives from the side, the upper limit of the transmission power is returned to the maximum upper limit.

[Invention 17] Further, when the wireless transmitter / receiver of the invention 17 detects the connection of earphones in the wireless transmitter / receiver of any one of the inventions 1 to 16 in a state where the upper limit of the transmission power and the reception performance are lowered. , Returns the upper limit of transmission power to the maximum upper limit.

[Invention 18] Further, when the wireless transmitter / receiver of the invention 18 detects the connection of a microphone in the wireless transmitter / receiver of any one of the inventions 1 to 17 in a state where the upper limit of the transmission power and the reception performance are lowered. , Returns the upper limit of transmission power to the maximum upper limit.

[Invention 19] Further, in the wireless transmitter / receiver of any one of the inventions 1 to 18, when the wireless transmitter / receiver of the invention 19 is in a position or area registered in advance, the upper limit value of the transmission power and the reception performance are maximized at the same time. Return to the upper limit.

[Invention 20] Further, the wireless transmitter / receiver of the invention 20 simultaneously sets the upper limit value of the transmission power and the maximum upper limit value of the reception performance at the time registered in advance in the wireless transmitter / receiver of any one of the inventions 1 to 19. Return to.

[Invention 21] Further, in the wireless transmitter / receiver of the invention 21, the upper limit of the transmission power is a value lower than the maximum transmission power in the standard required when the communication quality with the communication partner is the minimum, and the reception is received. The performance is a value lower than the standard maximum reception performance required when the communication quality with the communication partner is the minimum.

With such a configuration, the upper limit of the transmission power is lower than the maximum transmission power in the standard. Therefore, the power consumption can be suppressed by suppressing the upper limit of the transmission power by the intention of the user or the like. The effect of extending the continuous operation time can be obtained. Further, since the reception performance is a value lower than the maximum reception performance in the standard, it is possible to obtain an effect that the degree of breaking the "communication symmetry" can be reduced.

[Invention 22] Further, in the wireless transmitter / receiver of the invention 22, the upper limit of the transmission power is a value lower than the maximum transmission power in the standard required when the communication quality with the communication partner is the minimum, and the reception is received. A reception status notification means for notifying the communication partner of the reception status when the performance is set to a value lower than the maximum reception performance according to the standard required when the communication quality with the communication partner is the minimum is provided.

With such a configuration, the upper limit of the transmission power is lower than the maximum transmission power in the standard. Therefore, the power consumption can be suppressed by suppressing the upper limit of the transmission power by the intention of the user or the like. The effect of extending the continuous operation time can be obtained. Further, since the reception status notification means for notifying the communication partner of the reception status when the reception performance is set to a value lower than the maximum reception performance in the standard is provided, the degree of "communication symmetry" being broken can be reduced. The effect is obtained.

[Invention 23] Further, in the wireless transmitter / receiver of the invention 23, in the wireless transmitter / receiver of any one of the inventions 21 and 22, the reception performance is the reception sensitivity.

[Invention 24] Further, in the wireless transmitter / receiver of the invention 24, in the wireless transmitter / receiver of any one of the inventions 21 and 22, the reception performance is a reference value when it is determined that communication is established.

[Invention 25] Further, in the wireless transmitter / receiver of the invention 25, in the wireless transmitter / receiver of any one of the inventions 21 and 22, the reception performance is an allowable value of an error rate of received data.

[Invention 26] Further, the wireless transmitter / receiver of the invention 26 establishes communication with a communication partner in wireless transmission / reception stronger than the radio wave strength registered in advance depending on the reception performance in the wireless transmitter / receiver of any one of the inventions 21 to 25. ..

[Invention 27] Further, in the wireless transmitter / receiver of the invention 27, a transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value and a transmission power higher than the fixed upper limit value of the transmission power are provided. It is provided with a reception notification means for notifying when it is received from the communication partner necessary for communication.

In such a configuration, since the transmission power fixing means for fixing the upper limit value of the transmission power to a value lower than the maximum upper limit value is provided, the upper limit value of the transmission power is suppressed by the intention of the user or the like to consume power. The effect is obtained that the continuous operation time can be extended. Further, since the reception notification means is provided, it is possible to obtain an effect that it is possible to grasp that the transmission power higher than the upper limit value of the transmission power is received from the communication partner required for the communication.

[Invention 28] Further, in the wireless transmitter / receiver of the invention 28, the upper limit value of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner is the minimum. A reception notification means for notifying when a transmission power higher than the upper limit of the transmission power is received from a communication partner required for communication is provided.

With such a configuration, the upper limit of the transmission power is lower than the maximum transmission power in the standard. Therefore, the power consumption can be suppressed by suppressing the upper limit of the transmission power by the intention of the user or the like. The effect of extending the continuous operation time can be obtained. Further, since the reception notification means is provided, it is possible to obtain an effect that it is possible to grasp that the transmission power higher than the upper limit value of the transmission power is received from the communication partner required for the communication.

[Invention 29] Further, the wireless transmitter / receiver of the invention 29 is the wireless transmitter / receiver of any one of the inventions 27 and 28, and the reception notification means is a communication partner capable of communicating with a transmission power equal to or less than the upper limit value of the transmission power. When it is received from the communication partner, it is notified by the first notification mode, and when the transmission power higher than the upper limit value of the transmission power is received from the communication partner required for communication, the second notification mode is different from the first notification mode. Notify in the notification mode of.

With such a configuration, when receiving from a communication partner who can communicate with a transmission power equal to or less than the upper limit of transmission power, and when receiving from a communication partner who needs transmission power higher than the upper limit of transmission power for communication. Since the notification mode is different from that of the above, the effect that the reception status can be grasped from the notification mode can be obtained.

[Invention 30] Further, the wireless transmitter / receiver of the invention 30 is the wireless transmitter / receiver of any one of the inventions 27 to 29, and the reception performance is the reception sensitivity.

[Invention 31] Further, the wireless transmitter / receiver according to the invention 31 is the wireless transmitter / receiver according to any one of the inventions 27 to 29, and the reception performance is a reference value when it is determined that communication is established.

[Invention 32] Further, in the wireless transmitter / receiver according to the invention 32, in the wireless transmitter / receiver according to any one of the inventions 27 to 29, the reception performance is an allowable value of an error rate of received data.

[Invention 33] Further, the wireless transmitter / receiver of the invention 33 establishes communication with a communication partner in wireless transmission / reception stronger than the radio wave strength registered in advance depending on the reception performance in the wireless transmitter / receiver of any one of the inventions 27 to 32. ..

As described above, according to the wireless transmitter / receiver of the inventions 1 to 4, 21, 22, 27 or 28, the power consumption is suppressed by suppressing the upper limit value of the transmission power by the intention of the user or the like, and the continuous operation is performed. The effect is that it is possible to extend the time. In addition, the effect that the influence of the radio frequency electromagnetic field on the human body can be weakened can be obtained.

It is a figure which shows the basic structure of the wireless transmitter / receiver which concerns on 1st Embodiment of this invention. It is a figure which shows the basic structure of the wireless transmitter / receiver which concerns on 2nd Embodiment of this invention. It is a figure which shows the basic structure of the wireless transmitter / receiver which concerns on 3rd Embodiment of this invention. It is a figure which shows the basic structure of the wireless transmitter / receiver which concerns on 4th Embodiment of this invention. It is a figure which shows the basic structure of the wireless transmitter / receiver which concerns on 5th Embodiment of this invention. It is a flowchart which shows the basic operation of the wireless transmitter / receiver which concerns on embodiment of this invention. It is a figure which shows the display example of the wireless transmitter / receiver which concerns on 2nd Embodiment of this invention. It is a figure which shows the display example of the wireless transmitter / receiver which concerns on 2nd Embodiment of this invention. (A) is a diagram showing the transmission power characteristic of the conventional wireless terminal, and (b) is a diagram showing the transmission power characteristic of the wireless transmitter / receiver according to the second embodiment. It is an external view. This is a circuit example of a sensitivity controller. This is a circuit example of a transmission power controller. This is a circuit example of the control signal generator. This is a circuit example of the control signal generator. This is a circuit example of a communication establishment determination unit. This is a circuit example of a transmission power determination unit using a level limiter. This is a circuit example of a transmission power determination unit using a subtractor. This is a circuit example of a sensitivity converter. This is a circuit example of an analog communication establishment judgment unit with a built-in reference value generator. This is a circuit example of a digital communication establishment determination unit with a built-in reference value generator. (A) to (c) are diagrams showing the transmission power characteristic, the reception sensitivity characteristic and the reception intensity characteristic of the conventional wireless terminal, and (d) to (f) reduce only the upper limit value of the transmission power. It is a figure which shows the transmission power characteristic, the reception sensitivity characteristic and the reception intensity characteristic of the conventional wireless terminal in the case. (A) to (c) are diagrams showing transmission power characteristics, reception sensitivity characteristics, and reception intensity characteristics of a conventional wireless terminal, and (d) to (f) are radios according to the first embodiment. It is a figure which shows the transmission power characteristic, reception sensitivity characteristic and reception intensity characteristic of a transmitter / receiver.

Embodiments of the present invention will be described. Hereinafter, the relationship between the mobile communication system and the embodiment of the present invention will be described.

The configuration of a mobile communication system for connecting a mobile phone or a mobile PC with a built-in communication device is at least a wireless terminal, a "wireless base station that is the other party in wireless transmission / reception" (hereinafter referred to as a wireless base station), a public communication network, and the like. It consists of a "terminal that is the other party in information transmission".

In this mobile communication system, when an attempt is made to establish communication from a wireless terminal on this side to a "terminal that is the other party in information transmission", the wireless terminal on this side "a wireless base station that is the other party in wireless transmission / reception". Through the public communication network, it will be connected to the "terminal that is the other party in information transmission".

The present invention is a technique that can be widely applied not only to wireless terminals in mobile communication systems and wireless base stations in mobile communication systems, but also to one-to-one wireless communication and the like. The wireless transmitter / receiver according to the first to fifth embodiments will be described as an example in which the present invention is applied to a wireless terminal in a mobile communication system.

In the embodiment of the present invention, the states indicated by the expressions "normal" and "lower than normal" with respect to the transmission power and the reception sensitivity are defined below.

The transmission power of a wireless terminal in a conventional mobile communication system cannot be intentionally changed to a desired value by a user or the like, and the strength of radio waves received from a wireless base station is measured and based on the result. The wireless base station and the wireless terminal determined the transmission power of the wireless terminal.

In the embodiment of the present invention, the transmission power not changed by the user or the like is defined as "normal transmission power", whereas the transmission power intentionally changed by the user or the like is referred to as "lower transmission power than usual". ".

[First Embodiment] The wireless transmitter / receiver according to the first embodiment of the present invention will be described. FIG. 1 is a diagram showing a basic configuration of a wireless transmitter / receiver according to the first embodiment.

The configuration of this wireless transmitter / receiver and the operation of each part will be described. This wireless transmitter / receiver is composed of an "antenna" 111, a "receiver" 410, a "transmitter" 470, a "control signal generator" 450, and a "storage means" 114.

The "receiver" 410 includes at least a "band limiter" 121, a "sensitivity controller" 122, an "automatic gain control amplifier" 123, a "channel selector" 126, and a "demodulator" 128.

The "received signal" 331 received by the "antenna" 111 is input to the "receiver" 410. The "demodulated signal" 332 is output from the "receiver" 410. The "demodulated signal" 332 includes "information transmitted by the base station".

The reception sensitivity of the "sensitivity controller" 122 can be changed by the "correction control signal" 352 from the "control signal generator" 450.

A circuit example of the “sensitivity controller” 122 is shown in FIG. The "sensitivity controller" 122 can be configured, for example, as shown in FIG. 11 (a). In the example of FIG. 11A, the "sensitivity controller" 122 has a "first capacitor" whose one end is connected to the "band limiter" 121 and an anode terminal which is connected to the other end of the "first capacitor". A "PIN diode" 564 with a grounded cathode terminal, a "resistance element" that inputs a "correction control signal" 352 from one end, and a "PIN diode" 564 with one end connected to the other end of the "resistance element". It has a "coil" connected to the anode terminal of the "PIN diode" 564 and a "second capacitor" one end connected to the anode terminal of the "PIN diode" 564 and the other end connected to the "automatic gain control amplifier" 123. Has been done.

The “sensitivity controller” 122 can also be configured, for example, as shown in FIG. 11 (b). In the example of FIG. 11B, the "sensitivity controller" 122 has a "first capacitor" whose one end is connected to the "band limiter" 121, a "second capacitor" whose one end is grounded, and one end. The grounded "first resistance element", the "second resistance element" that inputs the "correction control signal" 352 from one end, and the first gate terminal G1 are connected to the other end of the "first capacitor" to form the second gate. Source terminal of "dual gate field effect transistor" in which terminal G2 is connected to the other ends of "second capacitor", "first resistance element" and "second resistance element", and one end of "dual gate field effect transistor" A "third capacitor" connected to S and grounded at the other end, a "third resistance element" connected to the source terminal S of the "dual gate field effect transistor" at one end and grounded at the other end, and one end " A "fourth resistance element" connected to the drain terminal D of the "dual gate field effect transistor" and the other end connected to the "power supply" VDD, and a "fourth resistance element" one end connected to the "power supply" VDD and the other end grounded. It is configured to have a "capacitor" and a "fifth capacitor" having one end connected to the drain terminal D of the "dual gate field effect transistor" and the other end connected to the "automatic gain control amplifier" 123.

The "transmitter" 470 includes at least a "carrier generator" 171, a "modulator" 172, and a "transmission power controller" 173.

The "modulated signal" 374 including the "information to be transmitted to the other party" is input to the "transmitter" 470. The "transmission unit" 470 generates a "transmission signal" 375 and outputs it to the "antenna" 111.

The "transmission power controller" 173 can change the transmission power by the "correction control signal" 352 from the "control signal generation unit" 450.

A circuit example of the “transmission power controller” 173 is shown in FIG. The “transmission power controller” 173 can be configured as shown in FIG. 12 (a). In the example of FIG. 12A, the "transmission power controller" 122 has a "first capacitor" whose one end is connected to the "modulator" 172 and an anode terminal which is connected to the other end of the "first capacitor". A "PIN diode" 564 with a grounded cathode terminal, a "resistor element" that inputs a "correction control signal" 352 from one end, and a "PIN diode" 564 with one end connected to the other end of the "resistance element". A "coil" connected to the anode terminal of the "PIN diode", a "second capacitor" whose end is connected to the anode terminal of the "PIN diode" 564, and an input terminal connected to the other end of the "second capacitor" from the output terminal. It is configured to include a "power amplifier" 566 that outputs a "transmission signal" 375.

The “transmission power controller” 173 can be configured as shown in FIG. 12 (b). In the example of FIG. 12B, the “transmission power controller” 122 inputs the output signal from the “modulator” 172 and the “correction control signal” 352 from the input terminal, and outputs the “transmission signal” 375 from the output terminal. It is configured to have a "gain variable power amplifier" 567.

The “storage means” 114 has a value lower than the maximum transmission power (for example, 1 [W]) (for example, 0.1 [W]) as a fixed value of the upper limit value of the transmission power, and a fixed value of the reception sensitivity. It stores fixed information indicating a value lower than the maximum reception sensitivity (for example, 0 [dB]) (for example, a value lowered by -10 [dB]). Here, the maximum transmission power means the maximum value of the transmission power that can be realized by the wireless transmitter / receiver in terms of performance, or the maximum transmission power according to the standard required when the communication quality with the wireless base station is the minimum. .. Further, the maximum reception sensitivity means the maximum value of the reception sensitivity that can be realized by the wireless transmitter / receiver in terms of performance, or the maximum reception sensitivity in the standard required when the communication quality with the wireless base station is the minimum. In addition, fixed information can be set by the user or the like. For example, it may be set by the manufacturer, seller or telecommunications carrier at the time of shipment of the wireless transmitter / receiver, or set by the parent when the parent who is the guardian gives the wireless transmitter / receiver to the child.

The "storage means" 114 generates a "fixed signal" 315 based on the fixed information and outputs the "fixed signal" 315 to the "control signal generator" 450.

The "fixed signal" 315 from the "storage means" 114 is input to the "control signal generator" 450. The “control signal generation unit” 450 outputs the “correction control signal” 352 determined based on the state of the “fixed signal” 315. The "control signal generation unit" 450 outputs the generated "correction control signal" 352 to the "transmission unit" 470 and the "reception unit" 410 in common.

That is, the "transmitting unit" 470 and the "receiving unit" 410 are controlled by the fixed information of the "storage means" 114.

FIG. 13 shows a circuit example of the “control signal generator” 450. The “control signal generator” 450 can be configured as shown in FIG. 13 (a). In the example of FIG. 13A, the "control signal generator" 450 has a "first resistor element" whose one end is connected to the "power supply" VDD and a "second resistor" whose one end is connected to the "power supply" VDD. The "element", the "flip flop" 577 in which the set terminal S is connected to the other end of the "first resistance element" and the reset terminal R is connected to the other end of the "second resistance element", and the control terminal is the "flip flop". "Analog switch" 578 connected to the output terminal Q of 577, "third resistance element" one end connected to "power supply" VDD and the other end connected to one end of "analog switch" 578, and one end A "fourth resistance element" that is connected to one end of the "analog switch" 578 and the other end is grounded, and a "fifth resistance element" that is connected to the other end of the "analog switch" 578 and the other end is grounded. The input terminal is connected to one end of the "analog switch" 578 and has a "voltage follower amplifier" 551 that outputs a "correction control signal" 352 from the output terminal.

The “control signal generator” 450 can be configured as shown in FIG. 13 (b). In the example of FIG. 13B, the "control signal generator" 450 has a "first resistance element" whose one end is connected to the "power supply" VDD and a "second resistor" whose one end is connected to the "power supply" VDD. The "element", the "flip-flop" 577 in which the set terminal S is connected to the other end of the "first resistance element" and the reset terminal R is connected to the other end of the "second resistance element", and the output enable terminal OE. Is connected to the output terminal Q of the "flip-flop" 577 and outputs the "correction control signal" 352 from the output terminal. N + 1 "first switch elements" connected to each of the input terminals and the other end grounded, and n + 1 n + 1 "three-state buffers" 576 connected to the "power supply" VDD at one end and the other end The n + 1 "third resistance element" connected to each of the input terminals and the output enable terminal OE are connected to the inverted output terminal ￣Q of the "flip-flop" 577, and the "correction control signal" 352 is connected from the output terminal. The second "three-state buffer" 576 that outputs, and the n + 1 "second switch element" that is connected to each of the n + 1 input terminals of the second "three-state buffer" 576 and the other end is grounded. And one end connected to the "power supply" VDD and the other end having n + 1 "fourth resistance elements" connected to each of the n + 1 input terminals of the second "three-state buffer" 576. Has been done.

In the examples of FIGS. 13 (a) and 13 (b), the "storage means" 114 has a "first switch element" having one end connected to the set terminal S of the "flip-flop" 577 and the other end grounded, and one end thereof. It is configured to have a "second switch element" connected to the reset terminal R of the "flip-flop" 577 and the other end of which is grounded. Then, the "storage means" 114 performs switching control of the "first switch element" or the "second switch element" based on the fixed information.

The operation when the transmission power of this wireless transmitter / receiver is "normal transmission power" will be described below.

The operation when the transmission power of the wireless transmitter / receiver is "normal transmission power" is the same as the operation of the conventional wireless terminal.

When the transmission power of this wireless transmitter / receiver is "normal transmission power", the "control signal generator" 450 is a "correction control signal" having a value that maintains "normal transmission power" and "normal reception sensitivity". 352 is generated and output to the "transmitter" 470 and the "receiver" 410.

Since the "correction control signal" 352 having a value for maintaining the "normal transmission power" is input to the "transmission power controller" 173, which is a component of the "transmission unit" 470, the "transmission unit" 470 is , The "transmission signal" 375 is output by the "normal transmission power".

Further, since the "correction control signal" 352 having a value for maintaining the "normal reception sensitivity" is input to the "sensitivity controller" 122 which is a component of the "reception unit" 410, the "reception unit" 410 Generates a "demodulated signal" 332 by "normal reception sensitivity".

A problem when the transmission power is lowered will be described. The wireless transmitter / receiver determines the transmission power according to the strength of the radio wave received from the wireless base station.

If the radio wave received from the radio base station is strong, the wireless transmitter / receiver reduces the transmission power. On the contrary, if the radio wave received from the wireless base station is weak, the wireless transmitter / receiver increases the transmission power.

Normally, the wireless transmitter / receiver transmits with the minimum necessary transmission power. For example, when the wireless transmitter / receiver is able to receive the radio waves of the wireless base station, if the transmission power of the wireless transmitter / receiver is simply reduced, the wireless base station cannot be reached and communication cannot be performed. In addition, the "communication symmetry" of the transmission output and reception sensitivity of the wireless transmitter / receiver is broken when viewed from the wireless base station. Therefore, the radio base station and the base station network cannot operate normally for this radio transmitter / receiver.

Such a problem and a method for solving the problem will be described more specifically in comparison with the conventional case.

21 (a) to 21 (c) are diagrams showing transmission power characteristics, reception sensitivity characteristics, and reception intensity characteristics of a conventional wireless terminal, and FIGS. 21 (d) to 21 (f) are upper limit values of transmission power. It is a figure which shows the transmission power characteristic, the reception sensitivity characteristic and the reception intensity characteristic of the conventional wireless terminal when only the value is lowered.

22 (a) to 22 (c) are diagrams showing transmission power characteristics, reception sensitivity characteristics, and reception intensity characteristics of a conventional wireless terminal, and FIGS. 22 (d) to 22 (f) show the present embodiment. It is a figure which shows the transmission power characteristic, reception sensitivity characteristic, and reception intensity characteristic of the said wireless transmitter / receiver.

The vertical axis 800 of FIGS. 21 (a) and 21 (d) and 22 (a) and 22 (d) indicates the transmission power, and the vertical axes of FIGS. 21 (b) and 21 (e) and 22 (b) and (e). The axis 801 shows the reception sensitivity, and the vertical axis 802 of FIGS. 21 (c), (f) and 21 (c), (f) shows the reception intensity. Further, the horizontal axis 803 of each graph of FIGS. 21 and 22 indicates a propagation loss (≈ distance) between the conventional wireless terminal (or the wireless transmitter / receiver according to the present embodiment) and the wireless base station. There is.

In a conventional wireless terminal, as shown in FIG. 21A, the transmission power increases as the propagation loss with and from the wireless base station increases (that is, as the radio wave arriving from the wireless base station weakens). The transmission power is controlled so as to. When the maximum transmission power 804 that the wireless terminal can exert is reached, the transmission power remains constant at the maximum transmission power 804, and the signal is sent to the wireless base station at a point where the propagation loss is slightly higher than the point where the maximum transmission power 804 is reached. Can no longer be transmitted. On the other hand, as shown in FIG. 21 (b), the reception sensitivity is set to the maximum reception sensitivity 805 that the wireless terminal can exert regardless of the propagation loss, so that the reception intensity is shown in FIG. 21 (c). As described above, as the propagation loss increases, the maximum reception intensity decreases from 815, and when the allowable value decreases to 806, the signal from the radio base station cannot be received.

In such a state, the range 807 in which the wireless terminal can transmit a signal to the wireless base station and the range 808 in which the wireless terminal can receive a signal from the wireless base station coincide with each other. Is kept. This is because the system is designed so that "communication symmetry" is maintained in consideration of the characteristics of the antenna and the noise figure of the receiving unit. Therefore, when the propagation loss exceeds the ranges 807 and 808 and increases to the ranges 809 and 810, the wireless terminal cannot establish communication with the wireless base station, and "out of service area" is displayed.

On the other hand, when only the upper limit of the transmission power is lowered to the constant value 811, the transmission power remains constant at the constant value 811 when it reaches the constant value 811 as shown in FIG. 21 (d), and the propagation loss. The signal cannot be transmitted to the radio base station at a point slightly higher than the point where the value 811 is reached. Therefore, the range 812 at which the wireless terminal can transmit the signal to the wireless base station is smaller than the case where the upper limit of the transmission power is not lowered. On the other hand, as shown in FIG. 21 (e), the reception sensitivity is set to the maximum reception sensitivity 805 regardless of the propagation loss, so that the reception intensity has a high propagation loss as shown in FIG. 21 (f). As the maximum reception strength decreases from 815, and decreases to the allowable value of 806, the signal from the radio base station cannot be received. Therefore, the range 808 in which the wireless terminal can receive the signal from the wireless base station is the same as the case where the upper limit of the transmission power is not lowered.

In such a state, the range 812 at which the wireless terminal can transmit a signal to the wireless base station and the range 808 at which the wireless terminal can receive a signal from the wireless base station do not match, so that "communication symmetry". Collapses. That is, when the propagation loss exceeds the range 812 but does not exceed the range 808, it is a one-way communication state in which the signal cannot be transmitted to the radio base station but the signal can be received from the radio base station. Therefore, the wireless terminal cannot make a call to the wireless base station even though "out of service area" is not displayed. This not only confuses the user, but as described above, the wireless base station and the base station network cannot operate normally with respect to the wireless terminal.

Therefore, in the wireless transmitter / receiver according to the present embodiment, FIG. 22 (d)
), When the upper limit of the transmission power is fixed to the constant value 811 by the fixed information of the “storage means” 114, as shown in FIG. 22 (e), according to the fixed upper limit of the transmission power 811. The reception sensitivity is fixed at a constant value of 813. For example, when the upper limit of the transmission power is fixed at a constant value 811 (for example, 0.1 [W]), the reception sensitivity is fixed at a constant value 813 (for example, a value reduced by −10 [dB]). If the reception sensitivity decreases, the reception intensity also becomes a predetermined value (corresponding to the difference between the maximum reception sensitivity 805 and the constant value 813) rather than the maximum reception intensity 815 as the propagation loss increases, as shown in FIG. 22 (f). When the value decreases from the reduced constant value 816 to the allowable value 806, the signal from the radio base station cannot be received. Therefore, since the range of reception intensity becomes small, the range 814 in which the wireless transmitter / receiver can receive the signal from the wireless base station becomes smaller than the case where the reception sensitivity is not lowered.

As a result, the range 812 at which the wireless transmitter / receiver can transmit the signal to the wireless base station and the range 814 at which the wireless transmitter / receiver can receive the signal from the wireless base station coincide with each other, so that "communication symmetry" is maintained.

The reception sensitivity may be fixed according to the upper limit of the transmission power. In this case, the range (reception range) in which the wireless transmitter / receiver can receive a signal from the wireless base station is set to the wireless base station. It is preferable to fix the signal so as to match the range (transmission range) in which the signal can be transmitted. However, the reception range and the transmission range do not necessarily have to match, and the "communication symmetry" is broken as long as the mismatch between the reception range and the transmission range can be reduced as compared with the case where the reception sensitivity is not lowered at all. Since the degree can be reduced, when the upper limit value of the transmission power is fixed, it can be said that the reception sensitivity may be fixed so that the reception range matches the transmission range or the mismatched portion becomes small.

Next, with respect to the wireless transmitter / receiver according to the present embodiment, the operation when the transmission power is fixed to "lower than usual transmission power" and the operation to prevent the above-mentioned trouble are set to the "sensitivity controller" 122 with a variable attenuator ( An example using the Variable Attenuator) will be described below.

Here, as a normal operation, the upper limit of the transmission power is fixed to 1/10. Based on the fixed information of the "storage means" 114, the "correction control signal" 352 is input from the "control signal generator" 450 to the "sensitivity controller" 122 (variable attenuator) and the "transmission power controller" 173. To.

Here, the "correction control signal" 352 is a value fixed to 1/10. The "transmission power controller" 173 fixes the upper limit value of the transmission power to 1/10 of the original maximum transmission power.

The "sensitivity controller" 122 (variable attenuator) fixes the attenuation factor to 1/10. Therefore, the wireless transmitter / receiver according to the present embodiment can switch the transmission power to "lower than normal transmission power" or return to "normal transmission power" by the fixed information of the "storage means" 114. In addition, the reception sensitivity also switches to "lower reception sensitivity than usual" or returns to "normal reception sensitivity" in conjunction with the switching of the transmission power.

Hereinafter, a method of lowering the reception sensitivity of the “reception unit” 410 will be described. The "sensitivity controller" 122, which is a component of the "receiver" 410, can be implemented by a variable attenuator and a variable amplifier.

In addition to using these, it is possible to fix the reception sensitivity of the "reception unit" 410 by narrowing the gain variable range of the "automatic gain control amplifier" 123.

In this way, in the present embodiment, the wireless transmitter / receiver fixes the upper limit value of the transmission power to a value lower than the maximum transmission power by the fixed information of the "storage means" 114, and sets the upper limit value of the fixed transmission power to the fixed upper limit value. Therefore, the reception sensitivity is fixed to a value lower than the maximum reception sensitivity.

As a result, the power consumption can be suppressed and the continuous operation time can be extended by suppressing the upper limit value of the transmission power intentionally by the user or the like. In addition, the influence of the radio frequency electromagnetic field on the human body can be weakened. Furthermore, the degree to which the "communication symmetry" is broken can be reduced.

[Second Embodiment] The wireless transmitter / receiver according to the second embodiment of the present invention will be described. FIG. 2 is a diagram showing a basic configuration of a wireless transmitter / receiver according to the second embodiment.

The configuration of this wireless transmitter / receiver and the operation of each part will be described. This wireless transmitter / receiver includes "antenna" 111, "receiver" 420, "communication establishment determination unit" 430, "transmission power determination unit" 460, "transmission unit" 470, "control signal generation unit" 450, and "memory". Means ”114.

The "receiver" 420 includes at least a "band limiter" 121, an "automatic gain control amplifier A" 124, an "automatic gain control amplifier B" 125, a "channel selector" 126, a "demodulator" 128, and a "reception level generation". It consists of "vessel" 129.

The "received signal" 331 received by the "antenna" 111 is input to the "receiver" 420. The "demodulated signal" 332 is output from the "receiver" 420. The "demodulated signal" 332 includes "information transmitted by the base station".

The "reception level generator" 129 converts the strength and quality of the "reception signal" 331 input to the "reception unit" 420 into a "reception level signal" 335 and outputs it. The "reception level generator" 129 simultaneously outputs the "reception level signal" 335 to the "communication establishment determination unit" 430 and the "transmission power determination unit" 460.

It should be noted that the "automatic gain control amplifier A" 124 and the "automatic gain control amplifier B" 125 are not indispensable, and can be implemented if there is at least one "automatic gain control amplifier".

The "communication establishment determination unit" 430 includes at least a "level comparator" 141. The "reception level signal" 335 from the "reception unit" 420 and the "correction control signal" 352 from the "control signal generation unit" 450 are input to the "communication establishment determination unit" 430.

The "communication establishment determination unit" 430 compares the value of the "reception level signal" 335 with the value of the "correction control signal" 352, and determines the state of the "communication establishment determination signal" 343.

The "communication establishment determination signal" 343 is output in either a "communication establishment possible" state or a "communication establishment failure" state.

FIG. 15 shows a circuit example of the “communication establishment determination unit” 430. The “communication establishment determination unit” 430 can be configured as shown in FIG. 15 (a). In the example of FIG. 15A, the “communication establishment determination unit” 430 includes the “level comparator” 141. The "level comparator" 141 is configured to include a "comparator" 553 by an analog circuit. The "comparator" 553 inputs the "reception level signal" 335 from the non-inverting input terminal, inputs the "correction control signal" 352 from the inverting input terminal, and outputs the "communication establishment determination signal" 343 from the output terminal. ..

The “communication establishment determination unit” 430 can be configured as shown in FIG. 15 (b). In the example of FIG. 15B, the “communication establishment determination unit” 430 includes the “level comparator” 141. The "level comparator" 141 includes an "A / D converter" 568 that inputs an "received level signal" 335 and performs A / D conversion, and a weighted "comparator" 558 by a logic circuit. .. The "comparator" 558 inputs the A / D converted "reception level signal" 335 from the first input terminal, inputs the "correction control signal" 352 (digital signal) from the second input terminal, and "communication is established." Judgment signal "343 is output from the output terminal.

The "transmission power determination unit" 460 includes at least a "level calculator" 163 and a "level limiter" 161.

The "reception level signal" 335 from the "reception unit" 420 and the "correction control signal" 352 from the "control signal generation unit" 450 are input to the "transmission power determination unit" 460.

The "level calculator" 163 of the "transmission power determination unit" 460 determines the transmission power from the value of the "reception level signal" 335.

The "level limiter" 161 confirms whether the transmission power determined by the "level calculator" 163 exceeds the upper limit value based on the value of the "correction control signal" 352, and if so, transmits. Change the power to the upper limit. This is output to the "transmission unit" 470 as the "transmission power control signal" 362.

That is, since the upper limit value limit is applied according to the value of the "correction control signal" 352, the "transmission power control signal" 362 with the upper limit value limited is output, and the transmission power is suppressed to a desired value or less.

16 and 17 show a circuit example of the “transmission power determination unit” 460. The “transmission power determination unit” 460 can be configured as shown in FIG. 16 (a). In the example of FIG. 16A, the “transmission power determination unit” 460 includes a “level limiter” 161 and a “level calculator” 163. The "level calculator" 163 is configured to include an "inverting amplifier" 533 by an analog circuit. The "inverting amplifier" 533 inputs the "reception level signal" 335, amplifies it, and outputs it. The "level limiter" 161 is configured to include a "level limiter" 559 by an analog circuit. The "level limiter" 559 inputs the amplified "reception level signal" 335 from the input terminal, inputs the "correction control signal" 352 as the "level limit reference voltage" 717, and inputs the "transmission power limit signal" 362. Output from the output terminal.

The “transmission power determination unit” 460 can be configured as shown in FIG. 16 (b). In the example of FIG. 16B, the “transmission power determination unit” 460 includes a “level limiter” 161 and a “level calculator” 163. The "level calculator" 163 is configured to include an "inverting amplifier" 533 by an analog circuit. The "inverting amplifier" 533 inputs the "reception level signal" 335, amplifies it, and outputs it. The "level limiter" 161 includes a "D / A converter" 569 that inputs a "correction control signal" 352 (digital signal) and performs D / A conversion, and a "level limiter" 559 that uses an analog circuit. Has been done. The "level limiter" 559 inputs the amplified "reception level signal" 335 from the input terminal, inputs the D / A converted "correction control signal" 352 as the "level limit reference voltage" 717, and "transmits". The power limit signal "362" is output from the output terminal.

The “transmission power determination unit” 460 can be configured as shown in FIG. 17 (a). In the example of FIG. 17A, the “transmission power determination unit” 460 includes a “subtractor” 555 by an analog circuit. The "subtractor" 555 inputs the "reception level signal" 335 and the "correction control signal" 352, subtracts the "correction control signal" 352 from the "reception level signal" 335, and "transmit power control" which is the subtraction result. The signal "362" is output from the output terminal.

The “transmission power determination unit” 460 can be configured as shown in FIG. 17 (b). In the example of FIG. 17B, the “transmission power determination unit” 460 has a “D / A converter” 569 that inputs a “correction control signal” 352 (digital signal) and performs D / A conversion, and a “subtraction” by an analog circuit. It is configured to have a "vessel" 555. The "subtractor" 555 inputs the "reception level signal" 335 and the D / A converted "correction control signal" 352, subtracts the "correction control signal" 352 from the "reception level signal" 335, and the subtraction result thereof. The "transmission power control signal" 362 is output from the output terminal.

The “transmission power determination unit” 460 can be configured as shown in FIG. 17 (c). In the example of FIG. 17C, the "transmission power determination unit" 460 has an "A / D converter" 568 that inputs a "reception level signal" 335 and performs A / D conversion, and a "subtractor" 557 by a logic circuit. , The output signal from the "subtractor" 557 is D / A converted, and the "D / A converter" 569 that outputs the "transmission power control signal" 362 is included. The "subtractor" 557 inputs the A / D converted "reception level signal" 335 and "correction control signal" 352 (digital signal), and subtracts the "correction control signal" 352 from the "reception level signal" 335. , The subtraction result is output from the output terminal.

The "transmitter" 470 includes at least a "carrier generator" 171, a "modulator" 172, and a "transmission power controller" 173.

The "modulated signal" 374 including the "information to be delivered to the other party" is input to the "transmitter" 470. The "transmission unit" 470 generates a "transmission signal" 375 and outputs it to the "antenna" 111.

The "transmission power controller" 173 can change the transmission power by the "transmission power control signal" 362 from the "transmission power determination unit" 460. A circuit example of the “transmission power controller” 173 is as shown in FIG.

The "storage means" 114 generates a "fixed signal" 315 based on the fixed information and outputs the "fixed signal" 315 to the "control signal generator" 450.

The "fixed signal" 315 from the "storage means" 114 is input to the "control signal generator" 450. The "control signal generation unit" 450 determines the value of the "correction control signal" 352 to be generated based on the state of the "fixed signal" 315. The "control signal generation unit" 450 outputs the generated "correction control signal" 352 to the "transmission power determination unit" 460 and the "communication establishment determination unit" 430. A circuit example of the “control signal generator” 450 is as shown in FIG.

Hereinafter, the role of the “reception level generator” 129 will be described. The "reception level generator" 129 is obtained from the "automatic gain control amplifier A" 124, the "automatic gain control amplifier B" 125, the "demodulator" 128, etc., which constitute the "receiver" 420, such as signal strength and signal error rate. The "reception level signal" 335 is generated based on the result of obtaining the information of the above and evaluating them.

Information such as signal strength and signal error rate may be used alone. Also, a plurality of pieces of information may be used. In that case, a plurality of pieces of information may be input in parallel, or may be added and input.

Hereinafter, the role of the “communication establishment determination unit” 430 will be described. The radio transmitter / receiver receives the radio wave transmitted by the radio base station, and outputs a "reception level signal" 335 corresponding to the received signal strength. The "communication establishment determination unit" 430 determines from the value of the "reception level signal" 335 that the radio wave of the transmission output limited by the "correction control signal" 352 can reach the radio base station and establish communication. Make a decision.

Therefore, if the state of the "communication establishment determination signal" 343 is "communication establishment failure", the radio wave transmitted by the wireless transmitter / receiver may not be received by the wireless base station. Therefore, communication from the wireless base station is assumed. Even if there is a start request, the wireless transmitter / receiver can prevent the communication from starting.

In this way, determining the establishment of communication based on the "reception level signal" 335 and restricting communication with a radio base station with a reception signal weaker than the radio wave strength registered in advance fixes the reception sensitivity. It is the same as not communicating with a radio base station with a weak received signal level.

The operation when the transmission power of this wireless transmitter / receiver is "normal transmission power" will be described below.

The operation when the transmission power of the wireless transmitter / receiver is "normal transmission power" is the same as the operation of the conventional wireless terminal.

When the transmission power of this wireless transmitter / receiver is "normal transmission power", the "control signal generator" 450 is a "correction control signal" having a value that maintains "normal transmission power" and "normal reception sensitivity". 352 is generated and output to the "transmission power determination unit" 460 and the "communication establishment determination unit" 430.

The "transmission power determination unit" 460 determines the value of the "transmission power control signal" 362 to be output to the "transmission unit" 470 based on the value of the "reception level signal" 335.

That is, when the value of the "reception level signal" 335 becomes high, the value of the "transmission power control signal" 362 is lowered in order to determine that the radio base station exists at a short distance and suppress the transmission power. On the contrary, when the value of the "reception level signal" 335 becomes low, it is determined that the radio base station exists at a long distance, and the value of the "transmission power control signal" 362 is increased.

At this time, the "correction control signal" 352 input to the "transmission power determination unit" 460 is a value for maintaining the "normal transmission power". Since this value is the value of the "maximum transmission power", the value of the "transmission power control signal" 362 output by the "transmission power determination unit" 460 to the "transmission unit" 470 is controlled up to the value of the "maximum transmission power". it can.

Further, at this time, since the "correction control signal" 352 input to the "communication establishment determination unit" 430 is a value that maintains the "normal reception sensitivity", the "communication establishment determination unit" 430 is used. It is determined whether the "demodulation signal" 332 at that time is from a wireless base station that can be reached when the wireless transmitter / receiver emits radio waves at the "maximum transmission power", and a "communication establishment determination signal" is determined. The state of 343 is output as either "communication is possible" or "communication is not possible". This is the same operation as a conventional wireless terminal.

By the way, in this state, in the conventional wireless terminal, the user or the like cannot change the transmission power to "lower than usual transmission power", and the user or the like reduces the transmission power to suppress the power consumption. Was impossible.

Furthermore, if you simply change the transmission power to a lower level in some way, "Although the radio waves arriving from the wireless base station arrive at the same strength as before, the radio waves radiated from this wireless transmitter / receiver will become weaker. It is expected that there will be a problem that the radio base station cannot be reached.

Here, with respect to the wireless transmitter / receiver according to the present embodiment, an operation when the transmission power is fixed to "a transmission power lower than usual" and an operation for preventing the above-mentioned trouble will be described below.

For example, when the transmission power of the wireless transmitter / receiver is fixed to be lower than usual, the "control signal generator" 450 is set to "correction control signal" having values of "lower than normal transmission power" and "lower than normal reception sensitivity". 352 is output in common to the "transmission power determination unit" 460 and the "communication establishment determination unit" 430.

That is, the "transmission power determination unit" 460 and the "communication establishment determination unit" 430 are controlled by the fixed information of the "storage means" 114.

The “transmission power determination unit” 460 outputs the “transmission power control signal” 362, which has a value within the upper limit value corresponding to the value of the “correction control signal” 352, to the “transmission unit” 470.

Therefore, the "transmission unit" 470 outputs the "transmission signal" 375 with the power within the upper limit value range.

At the same time, the "control signal generation unit" 450 outputs the "correction control signal" 352 to the "communication establishment determination unit" 430.

The "communication establishment determination unit" 430 determines whether communication can be established if the reception signal level from the radio base station is stronger than the value indicated by the "correction control signal" 352, which is a "communication establishment determination signal". Set the state of 343 to "Communication is possible".

When radiating from a wireless transmitter / receiver with "lower than normal transmission power", the "receiver" 420 outputs when a relatively weak radio wave arriving from a wireless base station located in a position where the radio wave cannot reach is received. Since the value of the "reception level signal" 335 is weaker than the value indicated by the "correction control signal" 352, the "communication establishment determination unit" 430 changes the state of the "communication establishment determination signal" 343 to "communication establishment failure". Set to.

Here, the "communication establishment determination signal" 343 may be output at the start of communication, or may be output when the "transmission signal" 375 reaches the upper limit of the "transmission power lower than usual".

The value indicated by the "correction control signal" 352 is not a positive logic or a negative logic in the circuit, but a value obtained by relatively comparing "normal transmission power" and "lower than normal transmission power".

As described above, by referring to the "communication establishment determination signal" 343, communication is performed only to the radio waves arriving from the radio base station within the range of the "lower than normal transmission power" radio waves radiated by the wireless transmitter / receiver. Therefore, the above-mentioned "problem that the radio wave radiated from this radio transmitter / receiver becomes weak and cannot reach the radio base station even though the radio wave arriving from the radio base station arrives at the same strength as before" occurs. Will not be.

The above operation is summarized in FIG. 6 as a flowchart. Further, FIG. 9 shows the transmission power characteristics.

FIG. 9A is a diagram showing transmission power characteristics of a conventional wireless terminal, and FIG. 9B is a diagram showing transmission power characteristics of a wireless transmitter / receiver according to the present embodiment.

994 of FIG. 9 represents a transmission power characteristic without correction control. 995 represents a transmission power characteristic when corrected by -10 [dB]. 996 represents the transmission power characteristic when corrected by -20 [dB].

As described above, the wireless transmitter / receiver according to the present embodiment is a wireless transmitter / receiver capable of fixing the upper limit value of the transmission power of the wireless transmitter / receiver by the user or the like, and fixes the reception sensitivity in conjunction with the wireless transmitter / receiver. As a result, it is a wireless transmitter / receiver that can suppress problems that may occur due to lowering the upper limit of transmission power.

Although the original "reception level signal" 335 does not decrease, the "communication establishment determination signal" 343 that the "reception level signal" 335 has decreased in a pseudo manner is output to the subsequent stage.

As a result, power consumption can be suppressed by fixing the upper limit value of the transmission power to "transmission power lower than usual".

Up to this point, regarding fixing the upper limit of the transmission power of the wireless transmitter / receiver, either "normal transmission power" or "lower than normal transmission power" is selected based on the fixed information of the "storage means" 114. I explained in the form of doing.

However, by making it possible to set fixed information step by step, 1 [W], 0.5 [W], 0.2 [W], 0.1 [W], 0.05 [W], 0. A value such as 01 [W] or 0.001 [W] may be selected in stepwise increments so that a user or the like can select a desired value of "transmission power lower than usual".

Alternatively, by using a variable resistor or the like, the value may be continuously variable so that the user or the like can select a “lower than normal transmission power” of the desired value.

The upper limit value of the transmission power set by this wireless transmitter / receiver, the current transmission power, the status display regarding the raw reception strength and the fixed reception sensitivity, the warning message, and the like are described.

When the upper limit of the transmission power is fixed and the reception sensitivity is fixed in conjunction with it, the fixed upper limit of the transmission power and / or the current transmission power may be displayed.

The signal strength at the "normal reception sensitivity" and / or the "lower reception sensitivity than usual" may be displayed.

By fixing the upper limit of the transmission power and fixing the reception sensitivity in conjunction with it, the case where the call cannot be made may be regarded as "out of pseudo range" and the state may be displayed. The user may be notified by other expressions, lamps, sounds, or voices. This allows the user to know whether communication is possible.

If the signal strength received from the "other party in wireless transmission / reception" becomes weak during a call, the user may be notified by a display, a lamp, a sound, or a voice.

In addition, when the transmission power is "lower than normal transmission power", this wireless transmitter / receiver provides information for notifying that the transmission power is "lower than normal transmission power" in "wireless transmission / reception". You may make a call to "the other party".

The specific operation of the wireless transmitter / receiver according to this embodiment will be described by taking a general mobile phone on the market as an example.

At the time of shipment, the mobile phone is fixed at "lower than usual transmission power", and at the same time, the reception sensitivity is also "lower than usual reception sensitivity". The maximum transmission output at this time is fixed at 0.1 [W] and reception sensitivity −10 [dB]. The normal maximum transmission output is 1 [W], and the reception sensitivity is 0 [dB].

Now the cell phone is in a campsite in a valley far from the base station. Even the strongest base station cannot communicate with a transmission output of 0.1 [W] and a reception sensitivity of -10 [dB]. In the normal state, if the transmission output is 1 [W] and the reception sensitivity is ± 0 [dB], a call can be made.

Normally, the mobile phone sends a control signal to a receivable base station, is registered in the base station, and is in a communicable state. However, since the maximum transmission output of the mobile phone is 0.1 [W] and the reception sensitivity is -10 [dB], communication is not possible.

At this time, the mobile phone displays the display shown in FIG. 7. 978 representing the transmission power indicates that the maximum transmission power is limited. 974, which represents the signal strength at normal reception sensitivity, indicates that the received signal is weak. 975, which represents the signal strength at a fixed reception sensitivity, indicates that reception is not possible. Since the user is in a state where communication is not possible because the transmission power is fixed to "lower than usual", 976 indicating out of pseudo-range is highlighted.

FIG. 8 shows a modified design of the icon of FIG. 988, which represents the transmission power, indicates that the maximum transmission power is limited. 984, which represents the signal strength at normal reception sensitivity, indicates that the received signal is weak. 985, which represents the signal strength at a fixed reception sensitivity, indicates that reception is not possible. Since the user is in a state where communication is not possible because the transmission power is fixed to "lower than usual", 986 indicating out of pseudo range is highlighted.

In this way, in the present embodiment, the wireless transmitter / receiver fixes the upper limit value of the transmission power by the fixed information of the "storage means" 114, and determines that the communication is established according to the fixed upper limit value of the transmission power. The reference value of is fixed.

As a result, the power consumption can be suppressed and the continuous operation time can be extended by suppressing the upper limit value of the transmission power intentionally by the user or the like. In addition, the influence of the radio frequency electromagnetic field on the human body can be weakened. Furthermore, the degree to which the "communication symmetry" is broken can be reduced.

In the present embodiment, the "correction control signal" 352 input to the "communication establishment determination unit" 430 corresponds to the "reference value when determining communication establishment" of the invention 10.

[Third Embodiment] The wireless transmitter / receiver according to the third embodiment of the present invention will be described. FIG. 3 is a diagram showing a basic configuration of a wireless transmitter / receiver according to a third embodiment.

This wireless transmitter / receiver is a wireless transmitter / receiver having the same effect as the wireless transmitter / receiver according to the second embodiment but having a different configuration.

In the wireless transmitter / receiver according to the second embodiment, the transmission power and the reception sensitivity are obtained by simultaneously inputting the "correction control signal" 352 to the "transmission power determination unit" 460 and the "communication establishment determination unit" 430. Are controlled in conjunction with each other.

Further, in order to determine that good communication with the wireless base station can be expected, the value of the "reception level signal" 335 and the value of the "correction control signal" 352 are compared in the "communication establishment determination unit" 430. There is.

The wireless transmitter / receiver according to the present embodiment is provided with a "sensitivity converter" 112 on the input side of the "communication establishment determination unit" 440 as compared with the wireless transmitter / receiver according to the second embodiment. , The "communication establishment determination unit" 440 is provided with a "reference value generator" 142 in addition to the "level comparator" 141.

A circuit example of the “sensitivity converter” 112 is shown in FIG. The "sensitivity converter" 112 can be configured as shown in FIG. 18 (a). In the example of FIG. 18A, the "sensitivity converter" 112 is configured to have an "adder" 554 by an analog circuit. The "adder" 554 inputs the "reception level signal" 335 and the "correction control signal" 352, adds the "reception level signal" 335 and the "correction control signal" 352, and receives the "conversion" which is the addition result. Received level signal "313 is output from the output terminal.

The "sensitivity converter" 112 can be configured as shown in FIG. 18 (b). In the example of FIG. 18B, the “sensitivity converter” 112 is a “D / A converter” 569 that inputs a “correction control signal” 352 (digital signal) and performs D / A conversion, and an “adder” using an analog circuit. 554 and is configured. The "adder" 554 inputs the "reception level signal" 335 and the D / A converted "correction control signal" 352, adds the "reception level signal" 335 and the "correction control signal" 352, and the addition result. The "converted reception level signal" 313 is output from the output terminal.

The "sensitivity converter" 112 can be configured as shown in FIG. 18 (c). In the example of FIG. 18C, the "sensitivity converter" 112 inputs the "reception level signal" 335 and performs A / D conversion, "A / D converter" 568, and the "adder" 556 by the logic circuit. It is configured to have. The "adder" 556 inputs the A / D converted "reception level signal" 335 and "correction control signal" 352 (digital signal), and adds the "reception level signal" 335 and the "correction control signal" 352. , The "converted reception level signal" 313 (digital signal), which is the addition result, is output from the output terminal.

Further, FIG. 19 and FIG. 20 show a circuit example of the “communication establishment determination unit” 440. The “communication establishment determination unit” 440 can be configured as shown in FIG. 19 (a). In the example of FIG. 19A, the “communication establishment determination unit” 440 includes a “level comparator” 141 and a “reference value generator” 142. The "level comparator" 141 is configured to include a "comparator" 553 by an analog circuit. The "comparator" 553 inputs the "converted reception level signal" 313 from the non-inverting input terminal, inputs the "reference voltage" 719 from the inverting input terminal, and outputs the "communication establishment determination signal" 343. Output from. The "reference value generator" 142 has a "first resistance element" having one end connected to the "power supply" VDD and the other end connected to the inverting input terminal of the "comparator" 553, and one end of the "comparator" 553. It is configured to have a "second resistance element" that is connected to the inverting input terminal and has the other end grounded.

The “communication establishment determination unit” 440 can be configured as shown in FIG. 19 (b). In the example of FIG. 19B, the “communication establishment determination unit” 440 includes a “level comparator” 141 and a “reference value generator” 142. The “level comparator” 141 is the same as in FIG. 19 (a). The "reference value generator" 142 performs D / A conversion between the "CPU" 545 that outputs a data signal (digital signal) corresponding to the "reference voltage" 719 and the data signal from the "CPU" 545, and "reference voltage". It is configured to have a "D / A converter" 569 that outputs as 719.

The “communication establishment determination unit” 440 can be configured as shown in FIG. 19 (c). In the example of FIG. 19C, the “communication establishment determination unit” 440 includes a “level comparator” 141 and a “reference value generator” 142. The “level comparator” 141 is the same as in FIG. 19 (a). The "reference value generator" 142 has a "resistor element" whose one end is connected to the "power supply" VDD and the other end is connected to the inverting input terminal of the "comparator" 553, and the cathode terminal is the inverting of the "comparator" 553. It is configured to have a "Zener diode" 565 connected to an input terminal and having an anode terminal grounded.

The “communication establishment determination unit” 440 can be configured as shown in FIG. 20 (a). In the example of FIG. 20A, the “communication establishment determination unit” 440 includes a “level comparator” 141 and a “reference value generator” 142. The "level comparator" 141 is configured to have a weighted "comparator" 558 by a logic circuit. The "comparator" 558 inputs the "converted reception level signal" 313 (digital signal) from the first input terminal, inputs the "reference value" 718 from the second input terminal, and inputs the "communication establishment determination signal". 343 is output from the output terminal. The "reference value generator" 142 has n + 1 "resistance elements" whose one end is connected to the "power supply" VDD and n + 1 "resistance elements" whose one end is connected to the other end of each "resistance element" and whose other end is grounded. It has a "switch element", and the output signal from the other end of each "resistance element" corresponds to each bit of the "reference value" 718 consisting of n + 1 bits.

The “communication establishment determination unit” 440 can be configured as shown in FIG. 20 (b). In the example of FIG. 20B, the "communication establishment determination unit" 440 includes a "level comparator" 141 and a "reference value generator" 142. The “level comparator” 141 is the same as in FIG. 20 (a). The "reference value generator" 142 includes a "first resistance element" whose one end is connected to the "power supply" VDD, a "second resistance element" whose one end is grounded, a "first resistance element", and a "second resistance element". It is configured to have an "A / D converter" 568 that A / D-converts an output signal from the other end of the "resistor element" and outputs a "reference value" 718.

The “communication establishment determination unit” 440 can be configured as shown in FIG. 20 (c). In the example of FIG. 20 (c), the "communication establishment determination unit" 440 includes a "level comparator" 141 and a "reference value generator" 142. The “level comparator” 141 is the same as in FIG. 20 (a). The "reference value generator" 142 includes a "resistor element" whose one end is connected to the "power supply" VDD, a "zener diode" 565 whose anode terminal is grounded, and the other end of the "resistance element" and a "zener diode". It is configured to have an "A / D converter" 568 that A / D-converts an output signal from the cathode terminal of 565 and outputs a "reference value" 718.

Further, the "correction control signal" 352 output by the "control signal generation unit" 450 is input to the "transmission power determination unit" 460 and at the same time input to the "sensitivity converter" 112. As a result, the transmission power and the reception sensitivity are controlled in conjunction with each other.

The "reception level signal" 335 output by the "reception unit" 420 is input to the "sensitivity converter" 112. The value of the "reception level signal" 335 is converted at a conversion rate that changes according to the value of the "correction control signal" 352, and is output as the "converted reception level signal" 313.

The "converted reception level signal" 313 is input to the "communication establishment determination unit" 440, and is compared with the value generated by the "reference value generator" 142 by the "level comparator" 141, and the "communication establishment" is performed. The determination unit "440" determines the state of the "communication establishment determination signal" 343.

The "communication establishment determination signal" 343 is output in either a "communication establishment possible" state or a "communication establishment failure" state.

The value generated by the "reference value generator" 142 is registered by the user or the like by determining an appropriate value. Alternatively, the wireless transmitter / receiver may calculate and register the optimum value. Further, a form in which a plurality of these are combined may be used.

As described above, the wireless transmitter / receiver according to the present embodiment is a wireless transmitter / receiver capable of fixing the upper limit value of the transmission power of the wireless transmitter / receiver by the user or the like, and the reception sensitivity is fixed in conjunction with the wireless transmitter / receiver. By referring to "Communication establishment determination signal" 343, it is possible to suppress a problem that may occur due to lowering the upper limit value of the transmission power.

As a result, power consumption can be suppressed by fixing the upper limit value of the transmission power to "transmission power lower than usual".

In the present embodiment, the "correction control signal" 352 input to the "sensitivity converter" 112 corresponds to the "reference value when determining that communication is established" of the invention 10.

[Fourth Embodiment] The wireless transmitter / receiver according to the fourth embodiment of the present invention will be described. The fourth embodiment corresponds to the embodiment of the wireless transmitter / receiver of the inventions 13 to 20. FIG. 4 is a diagram showing a basic configuration of a wireless transmitter / receiver according to a fourth embodiment.

This wireless transmitter / receiver is a wireless transmitter / receiver in which "means for detecting and processing various events" 116 is added to the wireless transmitter / receiver according to the second embodiment.

The "means for detecting and processing various events" 116 interlocks and fixes the transmission power and the reception sensitivity in the situation intended by the user or the like or in the situation registered in advance.

The following is an example of the wireless transmitter / receiver of the invention 13. Only the additional parts will be described. This wireless transmitter / receiver is a wireless transmitter / receiver capable of fixing the upper limit value of the transmission power by the fixed information of the "storage means" 114 by providing the following means, and the reception sensitivity is linked with the wireless transmitter / receiver. It is a wireless transmitter / receiver that can suppress problems that may occur due to the reduction of only the maximum transmission power.

In the embodiment of the wireless transmitter / receiver of the invention 13, the wireless transmitter / receiver according to the second embodiment is provided with a “control signal generation unit” 480 capable of processing the “fixed command processing unit” 481 and the “request information” 391. It is prepared.

A circuit example of the “control signal generator” 480 is shown in FIG. As shown in FIG. 14, the "control signal generator" 480 stores a "CPU" 545 that performs calculations and controls based on a control program, and a "CPU" 545 control program and the like stored in a predetermined area in advance. D / A of data signals from "RAM" 546 and "CPU" 545 for storing data read from "ROM" 547, "ROM" 547, etc. and calculation results required in the calculation process of "CPU" 545. It is configured with a "D / A converter" 569 that converts and outputs a "correction control signal" 352, and these can exchange data with each other on a "CPU bus" that is a signal line for transferring data. It is connected to the.

The "fixed command processing unit" 481 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 391 from the "fixed command processing unit" 481 is the "control signal generation unit" 480. Is entered in. A "storage means" 114 is connected to the "fixed command processing unit" 481, and a "fixed signal" 315 from the "storage means" 114 is input.

The "remote control command detection processing unit" 482 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 392 from the "remote control command detection processing unit" 482 is a "control signal". It is input to the "generating unit" 480.

The "communication partner detection comparison unit" 483 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 393 from the "communication partner detection comparison unit" 483 is a "control signal generation unit". Is entered in 480.

A "wired earphone / microphone detection unit" 484 is connected to the "CPU bus" via an I / F (not shown), and a "request information" 394 from the "wired earphone / microphone detection unit" 484 is a "control signal". It is input to the "generating unit" 480.

The "wireless earphone / microphone detection unit" 485 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 395 from the "wireless earphone / microphone detection unit" 485 is a "control signal". It is input to the "generating unit" 480.

The "current position detection area comparison unit" 486 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 396 from the "current position detection area comparison unit" 486 is a "control signal". It is input to the "generating unit" 480.

The "time information acquisition time zone comparison unit" 487 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 397 from the "time information acquisition time zone comparison unit" 487 is "request information". It is input to the control signal generator "480.

The "emergency alert transmission detection unit" 488 is connected to the "CPU bus" via an I / F (not shown), and the "request information" 398 from the "emergency alert transmission detection unit" 488 is a "control signal". It is input to the "generating unit" 480.

An "emergency alarm reception detection unit" 489 is connected to the "CPU bus" via an I / F (not shown), and "request information" 399 from the "emergency alarm reception detection unit" 489 is a "control signal generation unit". Is entered in 480.

A "fixed command processing unit" 481 is provided on the input side of the "control signal generation unit" 480. A "storage means" 114 is provided on the input side of the "fixed command processing unit" 481.

The “fixed signal” 315 is input from the “storage means” 114 to the “fixed command processing unit” 481. "Request information" 391 is input from "fixed command processing unit" 481 to "control signal generation unit" 480.

The "storage means" 114 generates a "fixed signal" 315 and outputs it to the "fixed command processing unit" 481.

The "fixed command processing unit" 481 performs processing based on the "fixed signal" 315 output by the "storage means" 114, and outputs the result as "request information" 391 to the "control signal generation unit" 480.

The "control signal generation unit" 480 generates and outputs a "correction control signal" 352 based on the "request information" 391.

Thereby, the upper limit value of the transmission power can be fixed by the fixed information of the "storage means" 114, and the reception sensitivity can be fixed in conjunction with the upper limit value. It is also possible to return the upper limit of the transmission power to the maximum transmission power.

Therefore, the transmission power can be switched to "lower transmission power than usual" or returned to "normal transmission power" by the fixed information of the "storage means" 114, and is linked to the switching of the transmission power. As a result, the reception sensitivity also switches to "lower reception sensitivity than usual" or returns to "normal reception sensitivity".

As an example, the operations of the "fixed command processing unit" 481 and the "control signal generation unit" 480 when the upper limit of the transmission power becomes lower than usual due to the fixed information of the "storage means" 114 are shown below.

The "storage means" 114 outputs the "fixed signal" 315 to the "fixed command processing unit" 481. The "fixed command processing unit" 481 processes the input "fixed signal" 315 and outputs "request information" 391 that fixes the upper limit of the transmission power to the "control signal generation unit" 480.

The "control signal generation unit" 480 outputs a "correction control signal" 352 that fixes the upper limit value of the transmission power and the reception sensitivity based on the input "request information" 391.

The following is an example of the wireless transmitter / receiver of the invention 14. Only the additional parts will be described. By providing the following means, this wireless transmitter / receiver can fix the upper limit of transmission power by remote control using communication means from the outside, and also fix the reception sensitivity in conjunction with it. it can.

In the embodiment of the wireless transmitter / receiver of the invention 14, the "control signal generator" capable of processing the "remote control command detection processing unit" 482 and the "request information" 392 in the wireless transmitter / receiver according to the second embodiment. It is equipped with 480. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "remote control command detection processing unit" 482 is provided on the input side of the "control signal generation unit" 480. The "demodulation signal" 332 is input from the "reception unit" 420 to the "remote control command detection processing unit" 482.

"Request information" 392 is input from "remote control command detection processing unit" 482 to "control signal generation unit" 480.

The "remote control command detection processing unit" 482 detects remote control command information from information transmitted from the outside using a communication means, creates "request information" 392 from the result, and creates a "control signal generation unit". Output to 480.

Further, the "remote control command detection processing unit" 482 compares the identification information such as the line number, IP address, URL, e-mail address, and MAC address of the remote control source with the "remote control source identification information registered in advance". Then, it is judged whether or not remote control is possible.

The "control signal generation unit" 480 outputs a "correction control signal" 352 that fixes the upper limit value of the transmission power and the reception sensitivity based on the "request information" 392 output by the "remote control command detection processing unit" 482. ..

In the above-mentioned "remote control source identification information registered in advance", information desired by the user or the like is registered. Alternatively, the wireless transmitter / receiver may generate and register information. Further, a form in which a plurality of these are combined may be used.

Further, the content of the "remote control source identification information registered in advance" may include a line number, an IP address, a URL, an e-mail address, a MAC address, etc. that identify a specific person in charge of management.

In this remote control, communication including operation command information can be used in some form. For example, an e-mail containing an operation command code, a voice call signal including an operation command tone, a voice call signal including an operation command pulse, a call call for the number of operation commands, and the like can be used.

In addition, by using this remote control, it is possible to operate and manage the transmission power status from one management wireless transmitter / receiver to a plurality of other wireless transmitters / receivers. Become.

The following is an example of the wireless transmitter / receiver of the invention 15. Only the additional parts will be described. By providing the following means, this wireless transmitter / receiver returns the upper limit value of the transmission power to the normal value when transmitting to the "partner in information transmission" registered in advance.

In the embodiment of the wireless transmitter / receiver of the invention 15, the "control signal generator" 480 capable of processing the "communication partner detection comparison unit" 483 and the "request information" 393 in the wireless transmitter / receiver according to the second embodiment. It is equipped with. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "communication partner detection comparison unit" 483 is provided on the input side of the "control signal generation unit" 480. "Request information" 393 is input from "communication partner detection comparison unit" 483 to "control signal generation unit" 480.

The "communication partner detection and comparison unit" 483 detects identification information such as the line number, IP address, URL, e-mail address, and MAC address of the "counterpart in information transmission" that is about to start communication, and the identification information and " The "important communication partner identification information" registered in advance is compared, and the "request information" 393 is output to the "control signal generator" 480 based on the result.

The "control signal generation unit" 480 maximizes or increases the upper limit of the transmission power based on the "request information" 393 output by the "communication partner detection comparison unit" 483, and fixes the reception sensitivity in conjunction with it. The correction control signal "352" is generated and output.

As an example, when the transmission power is "lower than usual transmission power" and communication is started with the "other party in information transmission" registered in "pre-registered important communication partner identification information", "than usual". The transmission power that was "low transmission power" can be returned to "normal transmission power". Also, regarding the reception sensitivity, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the transmission power.

The "important communication partner identification information registered in advance" is registered by the user or the like. Alternatively, the wireless transmitter / receiver may register the other party who has called many times. Further, a form in which a plurality of these are combined may be used.

In addition, the contents of "important communication partner identification information registered in advance" are generally urgent public institutions such as police and fire departments, family members, specific friends, and work that are considered to be of high importance to users. A line number, IP address, URL, e-mail address, MAC address, etc. that identify a specific business partner or the like can be considered.

The following is an example of the wireless transmitter / receiver of the invention 16. Only the additional parts will be described. When an incoming call is received from the "partner in information transmission" registered in the "pre-registered important communication partner identification information", the wireless transmitter / receiver of the invention 16 transmits the transmission power which was "lower than normal transmission power" to "normal transmission". Return to "power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

The embodiment of the wireless transmitter / receiver of the invention 16 is implemented by the configuration provided in the embodiment of the wireless transmitter / receiver of the invention 15.

The "communication partner detection and comparison unit" 483 detects identification information such as the line number, IP address, URL, e-mail address, and MAC address of the incoming "counterpart in information transmission", and the identification information and "pre-registered important communication" The "counterpart identification information" is compared, and the "request information" 393 is output to the "control signal generator" 480 based on the result.

The "control signal generation unit" 480 maximizes or increases the upper limit of the transmission power based on the "request information" 393 output by the "communication partner detection comparison unit" 483, and fixes the reception sensitivity in conjunction with it. The correction control signal "352" is generated and output.

As an example, when the transmission power is "lower than normal transmission power" and an incoming call is received from "the other party in information transmission" registered in "pre-registered important communication partner identification information", "lower than normal transmission power" The transmission power that was used can be returned to the "normal transmission power". Also, regarding the reception sensitivity, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the transmission power.

In addition, during communication with the "partner in information transmission" registered in the "important communication partner identification information registered in advance", the communication is terminated when the transmission power is returned to the "normal transmission power". Occasionally, regarding the timing of switching the transmission power to "lower than normal transmission power" again, this may be immediately switched to "lower than normal transmission power", or after a certain period of time, " You may switch to "lower transmission power than usual". Further, the state of the reception sensitivity at this time is also switched in conjunction with the state of the transmission power.

The following are examples of the wireless transmitter / receiver of the inventions 17 to 20. The examples of the wireless transmitter / receiver of the inventions 17 to 20 are implemented by providing the following means in the wireless transmitter / receiver according to the second embodiment, and the means detect and process a specific event. It is a wireless transmitter / receiver that can fix the upper limit of transmission power, and fixes the reception sensitivity in conjunction with it.

The following is a description of the “wired earphone / microphone detection unit” 484. Only the additional parts will be described.

By providing the following means, this wireless transmitter / receiver returns the upper limit of the transmission power to the normal value when a wired earphone is connected or a wired microphone is connected.

In the embodiment of this wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment is provided with a "control signal generator" 480 capable of processing "wired earphone, microphone detection unit" 484 and "request information" 394. It is prepared. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "wired earphone, microphone detection unit" 484 is provided on the input side of the "control signal generation unit" 480.

"Request information" 394 is input from "wired earphone, microphone detection unit" 484 to "control signal generation unit" 480.

The "wired earphone / microphone detection unit" 484 detects that a wired earphone or a wired microphone is connected to the main body, and outputs "request information" 394 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

The following is a description of the “wireless earphone / microphone detection unit” 485. Only the additional parts will be described.

By providing the following means, this wireless transmitter / receiver returns the upper limit of transmission power to the normal value when a wireless earphone is connected or a wireless microphone is connected.

In the embodiment of this wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment is provided with a "control signal generator" 480 capable of processing "wireless earphone, microphone detection unit" 485 and "request information" 395. It is prepared. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "wireless earphone / microphone detection unit" 485 is provided on the input side of the "control signal generation unit" 480.

"Request information" 395 is input from "wireless earphone, microphone detection unit" 485 to "control signal generation unit" 480.

The "wireless earphone / microphone detection unit" 485 detects that the wireless earphone or microphone is connected to the main body, and outputs "request information" 395 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

The following is a description of the “current position detection area comparison unit” 486. Only the additional parts will be described.

By providing the following means, this wireless transmitter / receiver returns the upper limit of the transmission power to the normal value when it is in a pre-registered area.

In the embodiment of this wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment is provided with a "control signal generation unit" 480 capable of processing "current position detection area comparison unit" 486 and "request information" 396. It is prepared. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "current position detection area comparison unit" 486 is provided on the input side of the "control signal generation unit" 480. "Request information" 396 is input from "current position detection area comparison unit" 486 to "control signal generation unit" 480.

The "current position detection area comparison unit" 486 detects the current position information, compares it with the "pre-registered area information", and outputs the "request information" 396 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

In the "pre-registered area information", the area information desired by the user or the like is registered. Alternatively, the wireless transmitter / receiver may generate and register area information. Further, a form in which a plurality of these are combined may be used.

In addition, the content of "pre-registered area information" may be the site of a medical facility.

The following is a description of the “time information acquisition time zone comparison unit” 487. Only the additional parts will be described.

By providing the following means, this wireless transmitter / receiver returns the upper limit value of the transmission power to the normal value when it is in the time zone registered in advance.

In an embodiment of this wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment may process the "time information acquisition time zone comparison unit" 487 and the "request information" 397 in the "control signal generation unit" 480. It is equipped with. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "time information acquisition time zone comparison unit" 487 is provided on the input side of the "control signal generation unit" 480. "Request information" 397 is input from "time information acquisition time zone comparison unit" 487 to "control signal generation unit" 480.

The "time information acquisition time zone comparison unit" 487 acquires the current time information, compares it with the "pre-registered time zone information", and outputs the "request information" 397 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

In the above-mentioned "time zone information registered in advance", time zone information desired by the user or the like is registered. Alternatively, the wireless transmitter / receiver may generate and register the time zone information. Further, a form in which a plurality of these are combined may be used.

In addition, the content of the "pre-registered time zone information" may include commuting time zone, commuting time zone, and time zone for attending a cram school.

The following is a description of the "emergency alert transmission detection unit" 488. Only the additional parts will be described.

By providing the following means, this wireless transmitter / receiver returns the upper limit of the transmission power to the normal value when the emergency alarm transmission function is used.

In the embodiment of the wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment is provided with the "emergency alert transmission detection unit" 488 and the "control signal generation unit" 480 capable of processing the "request information" 398. It is prepared. A circuit example of the “control signal generator” 480 is as shown in FIG.

An "emergency alert transmission detection unit" 488 is provided on the input side of the "control signal generation unit" 480. The "request information" 398 is input from the "emergency alert transmission detection unit" 488 to the "control signal generation unit" 480.

The "emergency alert transmission detection unit" 488 detects the information output from the emergency alert transmission function, and outputs the "request information" 398 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

The emergency alert transmission function is provided in the main body of this wireless transmitter / receiver, and a line number is input to the emergency alert destination in an emergency such as when a fire or danger is imminent. It is a function that can be issued immediately and easily without any problem.

In addition, the emergency notification destination may be a public institution such as the police or fire department, a security company, school-related staff, neighborhood association staff, guardians, or the like.

The following is a description of the “emergency alarm reception detection unit” 489. Only the additional parts will be described.

This wireless transmitter / receiver is provided with the following means, and when an emergency warning signal is received, the upper limit of the transmission power returns to the normal value.

In this embodiment of the wireless transmitter / receiver, the wireless transmitter / receiver according to the second embodiment includes an "emergency alarm reception detection unit" 489 and a "control signal generation unit" 480 capable of processing "request information" 399. It is a thing. A circuit example of the “control signal generator” 480 is as shown in FIG.

An "emergency alarm reception detection unit" 489 is provided on the input side of the "control signal generation unit" 480. The "demodulation signal" 332 is input from the "reception unit" 420 to the "emergency alarm reception detection unit" 489.

"Request information" 399 is input from "emergency alarm reception detection unit" 489 to "control signal generation unit" 480.

The "emergency warning reception detection unit" 489 detects the received emergency warning signal and outputs "request information" 399 to the "control signal generation unit" 480.

The "control signal generator" 480 maximizes or increases the upper limit of the transmission power. The reception sensitivity is fixed in conjunction with it.

That is, the transmission power that was "lower than normal transmission power" is returned to "normal transmission power". In addition, the reception sensitivity, which was "lower than normal reception sensitivity", returns to "normal reception sensitivity" in conjunction with the state of transmission power.

The emergency warning signal is a radio signal transmitted by activating the emergency alert transmission function. Alternatively, it may be a radio signal transmitted based on earthquake information or tsunami information issued by an administrative agency.

In the present embodiment, the "correction control signal" 352 input to the "communication establishment determination unit" 430 corresponds to the "reference value when determining communication establishment" of the invention 10.

[Fifth Embodiment] The wireless transmitter / receiver according to the fifth embodiment of the present invention will be described. FIG. 5 is a diagram showing a basic configuration of a wireless transmitter / receiver according to a fifth embodiment.

This wireless transmitter / receiver detects the current position of the wireless transmitter / receiver, and when it is in a pre-registered area, it fixes the upper limit of the transmission power and also fixes the reception sensitivity in conjunction with it. That is, the transmission power and the reception sensitivity are fixed at the same time.

The wireless transmitter / receiver according to the present embodiment is a “control signal generator” capable of processing the “current position detection area comparison unit” 486 and the “request information” 396 in the wireless transmitter / receiver according to the second embodiment. It is equipped with 480. A circuit example of the “control signal generator” 480 is as shown in FIG.

A "current position detection area comparison unit" 486 is provided on the input side of the "control signal generation unit" 480. "Request information" 396 is input from "current position detection area comparison unit" 486 to "control signal generation unit" 480.

The "current position detection area comparison unit" 486 detects the current position where the wireless transmitter / receiver is placed, and determines whether the position is inside or outside the area indicated by the "pre-registered area information". After that, it is determined whether to switch the state of the transmission power, and the result is output to the "control signal generator" 480 as "request information" 396.

The "control signal generation unit" 480 generates and outputs a "correction control signal" 352 based on the "request information" 396. The "correction control signal" 352 is output to the "transmission power determination unit" 460, and at the same time, is output to the "communication establishment determination unit" 430.

That is, the "transmission power determination unit" 460 and the "communication establishment determination unit" 430 are controlled by the fixed information of the "storage means" 114.

Therefore, depending on the position of the wireless transmitter / receiver, the transmission power can be switched to "lower than normal transmission power" or returned to "normal transmission power", and is linked to the switching of the transmission power. As a result, the reception sensitivity also switches to "lower reception sensitivity than usual" or returns to "normal reception sensitivity".

In the present embodiment, the "correction control signal" 352 input to the "communication establishment determination unit" 430 corresponds to the "reference value when determining communication establishment" of the invention 10.

[Modification Example] An example in which the wireless transmitter / receiver according to the first to fifth embodiments is applied as a wireless terminal in a mobile communication system, and the area information of the hospital site is registered in the "pre-registered area information". Will be explained.

If a picocell is installed in the ward, it is possible to suppress the transmission power of the wireless terminal that the picocell has designated as the "wireless transmission / reception partner". If the radio waves arriving from the wireless base station outside the premises are stronger, the wireless terminal will communicate with high transmission power according to the radio waves arriving from the wireless base station, and as a result, it will fail to suppress the transmission power. There is a risk of doing.

Even in such a case, by registering the area information of the hospital premises in the "pre-registered area information" as in the case of the wireless transmitter / receiver according to the fourth embodiment, the transmission output can be output in the hospital premises. It is possible to surely suppress it.

The picocell has the role of a radio base station in a mobile communication system, which is particularly small for indoor installation where transmission power is low and wireless transmission / reception is ensured in a very narrow and limited area. It is a radio base station.

In addition, one embodiment is described for the wireless transmitter / receiver according to the first to fifth embodiments. This is a problem that may occur when the upper limit of the transmission power is fixed by the user, etc., and at the same time, some change is given to the "reception system" to lower the upper limit of the transmission power. It is possible to suppress the power consumption and prevent the user from being confused.

Further, the wireless transmitter / receiver according to the first to fifth embodiments has been described as an example of application to a wireless terminal in a mobile communication system, but the present invention has one-to-one communication such as a transceiver. It is also possible in the relationship of.

Further, in the wireless transmitter / receiver according to the second to fifth embodiments, the strength of the received radio wave is measured, the upper limit of the transmission power is fixed based on the measurement, and good communication can be expected. However, in digital communication, instead of measuring the strength of the received radio wave, the error rate of the received data is measured, and the reception sensitivity is fixed based on the error rate, and it is also good. You may judge the state where communication can be expected.

Further, in the first embodiment and its modification, the reception sensitivity is fixed according to the upper limit value of the transmission power fixed by the fixed information of the "storage means" 114, but the present invention is not limited to this. In digital communication, the permissible value of the error rate of the received data may be fixed according to the upper limit value of the transmission power fixed by the fixed information of the "storage means" 114. Specifically, in the state of "normal transmission power", when the error rate of the received data is equal to or less than the first threshold value (allowable value of the error rate), it is judged that the communication is established, whereas "transmission lower than normal" is performed. In the "power" state, it is determined that communication is established when the error rate of the received data is equal to or less than the second threshold value (allowable value of the error rate) lower than the first threshold value.

Further, in the first to fifth embodiments and modifications thereof, the upper limit value of the transmission power is fixed by the fixed information of the "storage means" 114, and the reception sensitivity is set according to the fixed upper limit value of the transmission power. Although it is configured to be fixed, the following configuration can be adopted without being limited to this.

As the first configuration, a "setting means" (for example, a switch) that can set whether or not to fix is provided, and when fixing is set by the "setting means", the upper limit of the transmission power is lower than the maximum transmission power. It is fixed to a value, and the reception sensitivity is fixed to a value lower than the maximum reception sensitivity according to the fixed upper limit of the transmission power. In this case, the "storage means" 114 may not be provided.

As the second configuration, a "setting means" (for example, a switch) that can set whether or not to fix is provided, and when fixing is set by the "setting means", the reception sensitivity is fixed to a value lower than the maximum reception sensitivity. Then, the upper limit of the transmission power is fixed to a value lower than the maximum transmission power according to the fixed reception sensitivity. In this case, the "storage means" 114 may not be provided.

As a third configuration, an "operating means" (for example, a changeover switch, a push button switch, a variable resistor) that can be operated by a user or the like is provided, and the upper limit of the transmission power is set to the maximum transmission power by the operation of the "operation means". It is fixed to a value lower than the maximum reception sensitivity, and the reception sensitivity is fixed to a value lower than the maximum reception sensitivity according to the fixed upper limit value of the transmission power. In this case, the "storage means" 114 may not be provided.

As a fourth configuration, an "operating means" (for example, a changeover switch, a push button switch, a variable resistor) that can be operated by a user or the like is provided, and the receiving sensitivity is lowered by the operation of the "operating means" to be lower than the maximum receiving sensitivity. It is fixed to a value, and the upper limit of the transmission power is fixed to a value lower than the maximum transmission power according to the fixed reception sensitivity. In this case, the "storage means" 114 may not be provided.

In the third and fourth configurations, not only the upper limit value of the transmission power is fixed (hereinafter referred to as transmission control) and the reception sensitivity is fixed (hereinafter referred to as reception control) by a single operation. , (1) A configuration in which transmission control and reception control are performed by a plurality of operations, (2) A configuration in which transmission control is performed by a first operation (one or a plurality of operations) and then by a second operation (one or a plurality of operations). A configuration for performing reception control, (3) a configuration for performing reception control by a first operation (one or more operations), and then performing a transmission control by a second operation (one or more operations), or (4) a predetermined (5) A configuration in which only transmission control is performed by the operation (one or a plurality of operations), and reception control is performed so that the reception range matches the transmission range or the mismatched portion becomes smaller regardless of the operation. It is also possible to adopt a configuration in which only reception control is performed by an operation (one or a plurality of operations), and transmission control is performed so that the reception range matches the transmission range or the mismatched portion becomes smaller regardless of the operation. Further, a predetermined operation that triggers transmission control or reception control may be common to an operation for activating another function. For example, if it is common to the operation of increasing or decreasing the call volume, the upper limit of the transmission power can be fixed along with the operation of lowering the call volume.

Further, in the first to fifth embodiments and modifications thereof, it is determined that the reception performance (for example, reception sensitivity and communication is established) according to the upper limit value of the transmission power fixed by the fixed information of the "storage means" 114. It is configured to fix the reference value or the permissible value of the error rate of the received data), but it is not limited to this, and the reception status of the wireless transmitter / receiver is notified to the wireless base station, for example, the wireless base station wirelessly. In a configuration in which the transmission power or the like is controlled based on the reception status of the transmitter / receiver, the reception performance is fixed or fixed according to the upper limit value of the transmission power fixed by the fixed information of the "storage means" 114. It can also be configured to notify the communication partner of the reception status of the case. In this case, the reception performance of the wireless transmitter / receiver may or may not be fixed as in the first to fifth embodiments. When the reception performance is actually fixed by the wireless transmitter / receiver, the notification content is the reception status when the reception performance is fixed according to the fixed upper limit of the transmission power, and the reception performance is not fixed by the wireless transmitter / receiver, but the wireless base. When pretending to be fixed to the station, the notification content is the reception status when the reception performance is fixed according to the fixed upper limit of the transmission power. As for the reception status, in analog communication, for example, "the current reception strength is ** [dB]", and in digital communication, for example, "the current error rate is **." It becomes. However, it is sufficient to include only the information of "**" in the transmission signal. Again, the following configurations can be adopted.

As the first configuration, the upper limit of the transmission power is fixed to a value lower than the maximum upper limit, and the reception performance is fixed or fixed to a value lower than the maximum upper limit according to the fixed upper limit of the transmission power. Notify the communication partner of the reception status in the case of.

As the second configuration, the reception status when the reception performance is fixed to a value lower than the maximum upper limit value or when it is fixed is notified to the communication partner, and depending on the reception performance when the reception performance is fixed or fixed. The upper limit of the transmission power is fixed to a value lower than the maximum upper limit.

Further, in the first embodiment and its modification, as shown in FIGS. 22 (a) and 22 (d), only the upper limit value of the transmission power among the transmission power characteristics is reduced. Not limited to this, for example, it can be configured to reduce the overall transmission power characteristic. The same applies to the second to fifth embodiments and modifications thereof.

Further, in the first embodiment and its modification, as shown in FIGS. 22 (b) and 22 (e), the reception sensitivity is fixed to a constant value of 813 regardless of the propagation loss. Not limited to this, for example, it can be configured to gradually decrease from the maximum reception sensitivity 805 to a constant value 813 as the propagation loss increases. The same applies to the second to fifth embodiments and modifications thereof.

Further, in the first embodiment and its modification, the wireless transmitter / receiver fixes the upper limit value of the transmission power by the fixed information of the "storage means" 114, and the reception sensitivity according to the fixed upper limit value of the transmission power. However, if the current transmission power is fixed when the maximum transmission power is 804 in FIG. 22, the value is lower than the transmission power (maximum transmission power 804) required for communication with the wireless base station (maximum transmission power 804). It can be said that the constant value 811) is set as the upper limit value to suppress the transmission power. The same applies to the second to fifth embodiments and modifications thereof.

Further, in the first to fifth embodiments and modifications thereof, the upper limit value of the transmission power is fixed to a value lower than the maximum transmission power, and the reception sensitivity is maximized according to the fixed upper limit value of the transmission power. It is configured to be fixed at a value lower than the reception sensitivity, but the present invention is not limited to this, and the following configuration can also be adopted.

As the first configuration, the upper limit of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner (for example, a wireless base station) is the minimum, and the reception performance. Is a value lower than the maximum reception performance in the standard required when the communication quality with the communication partner is the minimum. That is, unlike the first to fifth embodiments and modifications thereof, the upper limit value of the transmission power and the reception sensitivity are not fixed to low values, but the upper limit value of the transmission power and the reception sensitivity are low from the beginning. It is a configuration that is a value.

As a second configuration, the upper limit of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner (for example, a wireless base station) is the minimum, and the reception performance. Is set to a value lower than the maximum reception performance in the standard required when the communication quality with the communication partner is the minimum, and the communication partner is notified of the reception status. That is, unlike the first to fifth embodiments and modifications thereof, the upper limit of the transmission power and the reception sensitivity are not fixed to low values, but the upper limit of the transmission power and the reception sensitivity are low from the beginning. It is a configuration that is a value.

As a third configuration, the upper limit of the transmission power is fixed to a value lower than the maximum upper limit, and when a transmission power higher than the fixed upper limit of the transmission power is received from the communication partner required for communication, a notification is given. .. That is, the reception performance does not necessarily have to be fixed at a low value, but even in a region where the reception range does not match the transmission range, notification is given so that at least reception is known.

As a fourth configuration, the upper limit of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner is the minimum, and the transmission is higher than the upper limit of the transmission power. Notify when power is received from the other party required for communication. That is, the reception performance does not necessarily have to be fixed at a low value, but even in a region where the reception range does not match the transmission range, notification is given so that at least reception is known.

As a fifth configuration, in the third and fourth configurations, when received from a communication partner capable of communicating with a transmission power equal to or less than the upper limit value of the transmission power, the first notification mode (for example, voice pattern 1 or vibration pattern) is used. When the notification is made in 1) and the transmission power higher than the upper limit of the transmission power is received from the communication partner required for communication, the second notification mode (for example, voice pattern 2 or vibration) different from the first notification mode is used. Notify by pattern 2).

111 Antenna 112 Sensitivity converter 114 Storage means 116 Means for detecting and processing various events 121 Band limiter 122 Sensitivity controller 123 Automatic gain control amplifier 124 Automatic gain control amplifier A125 Automatic gain control amplifier B126 Channel selector 128 Demodulator 129 reception Level generator 141 Level comparator 142 Reference value generator 161 Level limiter 163 Level calculator 171 Carrier carrier 172 Modulator 173 Transmit power controller 313 Converted reception level signal 315 Fixed signal 331 Reception signal 332 Demodition signal 335 Reception level signal 337 Signal strength information A338 Signal strength information B339 Signal error rate information 343 Communication establishment judgment signal 352 Correction control signal 362 Transmission power control signal 374 Modulation signal 375 Transmission signal 391-399 Request information 410,420 Receiver 430,440 Communication establishment judgment unit 450, 480 Control signal generation unit 460 Transmission power determination unit 470 Transmission unit 481 Fixed command processing unit 482 Remote operation command detection processing unit 483 Communication partner detection comparison unit 484 Wired earphone, microphone detection unit 485 Wireless earphone, microphone Detection unit 486 Current position detection area comparison unit 487 Time information acquisition time zone comparison unit 488 Emergency alert transmission detection unit 489 Emergency alarm reception detection unit 533 Inversion amplifier by analog circuit 545 CPU546 RAM547 ROM551 Voltage follower amplifier 555 Comparer by analog circuit 554 Adder by analog circuit 555 Adder by analog circuit 556 Adder by logic circuit 557 Subtractor by logic circuit 558 Weighted comparator by logic circuit 559 Level limiter by analog circuit 564 PIN diode 565 Zener diode 566 Power amplifier 567 Gain variable Power amplifier 568 A / D converter 569 D / A converter 576 Three-state buffer 575 Flip flop 578 Analog switch 717 Level limit Reference voltage 718 Reference value 719 Reference voltage 800 Transmission power 801 Reception sensitivity 802 Reception strength 803 Conventional wireless terminal (or Propagation loss between the wireless transmitter / receiver according to the first embodiment) and the wireless base station 804 Maximum transmission power that the wireless transmitter / receiver (or conventional wireless terminal) can exert 805 Wireless transmitter / receiver (or conventional wireless terminal) Maximum reception sensitivity 806 that can be demonstrated Values 807,812 Range in which the wireless transmitter / receiver (or conventional wireless terminal) can transmit signals to the wireless base station 808,814 Range in which the wireless transmitter / receiver (or conventional wireless terminal) can receive signals from the wireless base station 809 Range in which the conventional wireless terminal cannot transmit signals to the wireless base station 810 Range in which the conventional wireless terminal cannot receive signals from the wireless base station 811,831,816 Constant value 815 Maximum reception strength 911 Upper limit of transmission power and reception Key switch 912 that returns the sensitivity to normal Key switch that fixes the upper limit of transmission power and reception sensitivity to lower values 961 Fixes the upper limit of transmission power and reception sensitivity 962 The transmission power decreases 963 The reception sensitivity decreases 964 Judgment whether good communication can be expected 965 Expected 966 Communication possible 967 Unexpected 968 Communication is suppressed (out of service area) 971 Display 972 The shaded area indicates the upper limit of the set transmission power 973 The current transmission power is blacked out. Represents 974 Represents signal strength at normal reception sensitivity 975 Represents signal strength at fixed reception sensitivity 976 Represents pseudo-out of service area and is highlighted 977 Represents out of service area 978 Represents transmission power 981 Display 982 setting The shaded area represents the upper limit of the transmitted power. 983 The current transmission power is shown in black. 984 The signal strength at normal reception sensitivity is shown on the left side. 985 The signal strength at fixed reception sensitivity is shown on the right side. 986 Pseudo Shown out of service area, highlighted 987 Indicates out of service area 988 Represents transmission power 991 Transmission power 992 Inverse number of reception level signal 993 Correction control signal 994 Represents transmission power characteristic without correction control 995-10 [dB] Corrected 996-20 [dB] represents the transmission power characteristic of the case. 997 represents the transmission power characteristic when corrected. 997 Represents the transmission power characteristic of the conventional wireless terminal.

Claims (26)

A transmission power fixing means that fixes the upper limit of the transmission power to a value lower than the maximum upper limit, and a reception performance fixing means that fixes the reception performance to a value lower than the maximum upper limit according to the fixed upper limit of the transmission power. A wireless transmitter / receiver characterized by being equipped with. It includes a reception performance fixing means for fixing the reception performance to a value lower than the maximum upper limit value, and a transmission power fixing means for fixing the transmission power upper limit value to a value lower than the maximum upper limit value according to the fixed reception performance. A wireless transmitter / receiver characterized by that. The transmission power fixing means that fixes the upper limit of the transmission power to a value lower than the maximum upper limit, and the case where the reception performance is fixed or fixed to a value lower than the maximum upper limit according to the fixed upper limit of the transmission power. A wireless transmitter / receiver including a reception status notification means for notifying the communication partner of the reception status in the case of. Depending on the reception status notification means that notifies the communication partner of the reception status when the reception performance is fixed to a value lower than the maximum upper limit value or when it is fixed, and the reception performance when the reception performance is fixed or fixed. A wireless transmitter / receiver including a transmission power fixing means for fixing an upper limit value of transmission power to a value lower than the maximum upper limit value. In any one of claims 1 and 2, the storage means for storing fixed information indicating a value lower than the maximum upper limit value as a fixed value of the reception performance is provided, and the reception performance fixing means is for fixing the storage means. A wireless transmitter / receiver characterized by fixing reception performance based on information. In any one of claims 1, 2 and 5, the setting means capable of setting the possibility of fixing is provided, and the receiving performance fixing means fixes the receiving performance when the fixing is set by the setting means. A wireless transmitter / receiver characterized by that. In any one of claims 1 to 6, the storage means for storing fixed information indicating a value lower than the maximum upper limit value as a fixed value of the upper limit value of the transmission power is provided, and the transmission power fixing means is the storage. A wireless transmitter / receiver characterized in that the upper limit of transmission power is fixed based on the fixed information of the means. In any one of claims 1 to 7, the setting means capable of setting whether or not to fix the transmission power is provided, and the transmission power fixing means fixes the upper limit value of the transmission power when the fixing is set by the setting means. A wireless transmitter / receiver characterized by The wireless transmitter / receiver according to any one of claims 1 to 8, wherein the reception performance is reception sensitivity. A wireless transmitter / receiver according to any one of claims 1 to 8, wherein the reception performance is a reference value when it is determined that communication is established. A wireless transmitter / receiver according to any one of claims 1 to 8, wherein the reception performance is an allowable value of an error rate of received data. A wireless transmitter / receiver according to any one of claims 1 to 11, wherein communication with a communication partner is established in wireless transmission / reception stronger than the radio wave strength registered in advance depending on the reception performance. The wireless transmitter / receiver according to any one of claims 1 to 12, wherein the upper limit value of the transmission power and the reception performance are simultaneously returned to the maximum upper limit value by the control signal generated by the fixed information. The feature of any one of claims 1 to 13 is that the upper limit value of the transmission power and the reception performance are simultaneously returned to the maximum upper limit value by the control signal generated by transmitting information from the outside and remotely controlling the information. Wireless transmitter / receiver. In any one of claims 1 to 14, when transmitting to the other party in information transmission registered in advance in a state where the upper limit value of the transmission power and the reception performance are deteriorated, the upper limit value of the transmission power is set to the maximum upper limit value. A wireless transmitter / receiver characterized by returning to. In any one of claims 1 to 15, when an incoming call is received from the other party in information transmission registered in advance in a state where the upper limit value of the transmission power and the reception performance are deteriorated, the upper limit value of the transmission power is set to the maximum upper limit value. A wireless transmitter / receiver characterized by returning to. The feature of any one of claims 1 to 16 is that when the connection of the earphone is detected in the state where the upper limit value of the transmission power and the reception performance are deteriorated, the upper limit value of the transmission power is returned to the maximum upper limit value. Wireless transmitter / receiver. The feature of any one of claims 1 to 17 is that when a microphone connection is detected in a state where the upper limit value of the transmission power and the reception performance are deteriorated, the upper limit value of the transmission power is returned to the maximum upper limit value. Wireless transmitter / receiver. A wireless transmitter / receiver according to any one of claims 1 to 18, wherein when the position or area is registered in advance, the upper limit value of the transmission power and the reception performance are simultaneously returned to the maximum upper limit value. A wireless transmitter / receiver according to any one of claims 1 to 19, wherein when the time is registered in advance, the upper limit value of the transmission power and the reception performance are simultaneously returned to the maximum upper limit value. The upper limit of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner is the minimum, and the reception performance is the minimum communication quality with the communication partner. A wireless transmitter / receiver characterized in that the value is lower than the maximum reception performance required in some cases. The upper limit of the transmission power is a value lower than the maximum transmission power according to the standard required when the communication quality with the communication partner is the minimum, and the reception performance is the minimum communication quality with the communication partner. A wireless transmitter / receiver provided with a reception status notification means for notifying the communication partner of the reception status when the value is lower than the maximum reception performance required in a certain case. A wireless transmitter / receiver according to any one of claims 21 and 22, wherein the reception performance is reception sensitivity. A wireless transmitter / receiver according to any one of claims 21 and 22, wherein the reception performance is a reference value when it is determined that communication is established. A wireless transmitter / receiver according to any one of claims 21 and 22, wherein the reception performance is an allowable value of an error rate of received data. The wireless transmitter / receiver according to any one of claims 21 to 25, characterized in that communication with a communication partner is established in wireless transmission / reception stronger than the radio wave strength registered in advance depending on the reception performance.

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