JP3081460B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control method when a wireless communication device such as a portable telephone is connected to a wireless output amplifier such as a booster.

[0002]

2. Description of the Related Art Conventionally, the output of a radio transmission from a portable telephone device is controlled by switching the radio output level according to information from a base station and transmitting the output. It is common practice to connect a booster (wireless output amplifier) to a mobile phone device to increase the wireless output. For example, Japanese Patent Application Laid-Open No. 2-159155 (H04M1 / 00) discloses a portable wireless device having a transmitting / receiving antenna and switching a transmission output level according to a control signal, and a portable wireless device provided on a moving body such as an automobile having a transmitting / receiving antenna. There is described a wireless telephone device including an on-board adapter capable of transmitting and receiving a wireless device.

[0005] By the way, analog systems have been conventionally used as portable telephone devices. However, since demand is expected to increase in the future, digital systems have recently been adopted and more efficient portable telephone systems have been introduced. It became so. This digital type mobile phone is also called a PDC system, and its details are determined by "Standards for Digital Mobile Phone System (STD-27B)" issued by the Radio System Development Center.

According to this standard, the radio transmission output of the portable telephone device during a call is determined by the mobile station notifying the base station of the type information of the mobile station at the time of incoming or outgoing call. That is, in the standard, there are mobile station types I, II, and III as mobile stations, each having a maximum transmission output of 3 W, 2
W, 0.8W. Therefore, it is impossible with the current standard to change from the mobile phone device to the base station due to a change in the state of the mobile station during a call.

[0005]

However, when the adapter shown in the above-mentioned prior art is used, for example, when a portable telephone device is connected to a booster during a call, an output exceeding the maximum transmission output notified at the start of the call is obtained. However, there is a problem to be solved in that the transmission is performed and the standard is not satisfied.

The present invention solves this problem and, even if a portable telephone device is connected to a booster during a call, a control means that does not exceed the maximum transmission output set at the start of the call is provided by the portable telephone device and a series of boosters. It is realized by the configuration described above.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention relates to a wireless communication apparatus comprising a portable telephone connected to a booster, wherein the portable telephone comprises a transmitting circuit and a transmitting / receiving circuit. And an antenna for performing
A switch for selectively transmitting a transmission signal transmitted from the transmission circuit to either the antenna or the booster, an output control circuit for controlling a transmission output of the transmission circuit, and the booster being connected A connection detection circuit that detects the maximum transmission output that can be transmitted, a maximum transmission output storage unit that stores the maximum transmission output that can be transmitted, and an amplification level storage unit that stores an amplification level to be amplified. When it is detected that the booster is connected to the mobile phone, a level obtained by subtracting the amplification level to be amplified from the maximum transmission output is transmitted to the booster,
By controlling the amplification factor of the output amplifying circuit of the booster so as to amplify the signal by the level, the signal is transmitted at a transmission power not exceeding the maximum transmission power set at the start of the call. .

Further, the present invention relates to a wireless communication apparatus comprising a mobile phone and a booster, wherein the mobile phone has a transmitting circuit, an antenna for transmitting and receiving, and a transmitting signal transmitted from the transmitting circuit, A switch for selectively transmitting to any of the boosters;
An output control circuit for controlling a transmission output of the transmission circuit, a connection detection circuit for detecting that the booster is connected, a maximum transmission output storage for storing a maximum transmission output that can be transmitted, and an amplification level to be amplified And an amplification level storage device that stores an output amplification circuit that amplifies a transmission signal transmitted from the mobile phone, and a control circuit that controls an amplification factor of the output amplification circuit.
When the connection detection circuit detects that the booster is connected to the mobile phone during a call, a level obtained by subtracting the amplification level to be amplified from the maximum transmission output is transmitted to the booster, and the booster is controlled. The circuit controls an amplification factor of the output amplification circuit so as to amplify the level,
The transmission is performed with a transmission power that does not exceed the maximum transmission power set at the start of the call.

[0009]

When detecting that the mobile phone device is connected to the booster during a call, the mobile communication device notifies the booster of the connection information during the call. Further, at the time of connection, the mobile phone device notifies the booster of the amplification level information to the booster, and the booster side performs output control to amplify the transmission output of the mobile phone device by a certain level, thereby achieving the maximum transmission set at the start of the call. Achieve control that does not exceed output.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram for realizing one embodiment of the present invention. In the figure, reference numeral 1 denotes a mobile phone, and 2 denotes a booster. The mobile phone 1 and the booster 2 are connected via an RF signal line 3 and a control signal line 4. Reference numeral 5 denotes a transmission circuit of the mobile phone 1. The transmission circuit 5 has its output controlled based on an output control circuit 6 controlled by a control circuit 7 and also through a switch 8 to an antenna 19 or an RF signal line. An output signal is selectively sent to the booster 2. The control circuit 7 includes an amplification level storage 9,
It comprises a maximum transmission output storage unit 10, a connection detection circuit 11, and a CPU 12 for controlling devices according to a flowchart described later.

On the other hand, the booster 2 is connected to the mobile phone 1
An output amplifier circuit 12 for amplifying a transmission signal transmitted via the F signal line 3, a control circuit 14 for controlling the output of the output amplifier circuit, a control circuit 15, and an antenna 16. It comprises a level storage 17 and a CPU 18.

When the booster 2 is connected to the mobile phone 1, the connection detection circuit 11 of the mobile phone 1 detects that the booster 2 has been connected. In accordance with this detection, the connection detection circuit 11 notifies the mobile phone CPU 12 that the booster 2 has been connected. The mobile phone CPU 12
The booster connection status information is stored in the register. The mobile phone CPU 12 stores information indicating whether the mobile phone 1 is talking or waiting.
Determines whether the time at which the booster 2 is connected to the mobile phone 1 is during a call or a standby based on this information. When it is determined that the booster 2 is connected during a call, the mobile phone 1 and the booster 2 operate according to the flowcharts shown in FIGS.

FIG. 2A is a flowchart showing the operation of the portable telephone 1, and FIG. 2B is a flowchart showing the operation of the booster 2. Hereinafter, the operation of the portable telephone 1 and the booster 2 will be described with reference to the flowchart.

First, on the portable telephone 1 side, as shown in FIG. 1A, information indicating that connection has been established during a call is transmitted from the control circuit 7 to the booster 2 via the control signal line 4 in accordance with an instruction from the CPU 12. (Step 101). Next, the cellular phone CPU 12 sends the level information to be amplified on the booster 2 side held in the amplification level storage 9 from the control circuit 7 to the booster 2 via the control signal line 4 (step 102). Further, the control circuit 7 calculates, by the CPU 12, a transmission output value obtained by subtracting the output level stored in the amplification level storage 9 from the output level stored in the maximum transmission output storage 10 set at the start of the call. Then, based on the output value, a control signal is sent to the output control circuit 6 (step 103), and the output control circuit 6 controls the transmission circuit 5 to set the transmission output to a desired level (step 104). As a result, the output whose level has been changed is output from the transmission circuit 5. At the same time, the control circuit 7 switches the switch 8 to supply a radio signal from the mobile phone antenna 19 to the RF signal line 3 (step 105), and the radio signal is input to the booster output amplifier circuit 13 via the RF signal line 3. And then
When the end is detected in step 106, the end information is transmitted to the booster 2 (step 107).

On the other hand, the control circuit 15 of the booster 2 is always in a state of receiving the information from the control signal line 4, and has received, via the control signal line 4, the information that the connection has been made during the call from the portable telephone 1. At the time (step 201), the information is notified to the CPU 18 of the booster 2. Further, when the booster control circuit 6 receives the amplification level information from the mobile phone 1 (step 202), it notifies the CPU 18 and stores it in the amplification level storage 17. The booster CPU 18
The control circuit 15 instructs the output control circuit 14 to amplify the output by the amplification level based on the level information to be amplified held in the amplification level storage 17 (step 203). The output control circuit 14 controls the output amplifying circuit 13 to amplify the signal by the level and transmit the amplified signal from the antenna 16 (step 204). This operation is continued until the control circuit 15 receives the communication end information from the control signal line 4 (Step 205).

By performing such control, even if the booster is connected during a call, the transmission will not be transmitted beyond the maximum transmission output. At this time, the booster will also amplify a certain amount, so that the portable telephone can be used. The amount of amplification may be small, and the power consumption is reduced.

[0017]

As described above, the wireless communication apparatus according to the present invention performs wireless output control with a simple configuration that does not exceed the set maximum transmission output even when connected to a booster while a mobile phone is talking. It is possible to prevent the problem that would occur if the transmission was performed with a large output exceeding the standard output.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a wireless communication device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents of the mobile phone according to one embodiment of the present invention.

[Description of Signs] 1 mobile phone 2 booster 3 RF signal line 4 control signal line 5 mobile phone transmission circuit 6 mobile phone output control circuit 7 mobile phone control circuit 8 RF signal line switch 9 amplification level storage 10 maximum transmission output storage Unit 11 Connection detection circuit 12 Mobile phone CPU 13 Booster output amplifier circuit 14 Booster output control circuit 15 Booster control circuit 16 Booster antenna 17 Amplification level storage 18 Booster CPU 19 Mobile phone antenna

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 1/725 H04B ⁷ /24-7/26 102 H04Q ⁷ /20-7/38

Claims (2)

(57) [Claims] 1. A wireless communication device comprising a mobile phone connected to a booster for use, the mobile phone comprising a transmitting circuit, an antenna for transmitting and receiving, and a transmitting signal transmitted from the transmitting circuit to the antenna. Or a switch for selectively transmitting to any of the boosters; an output control circuit for controlling a transmission output of the transmission circuit; a connection detection circuit for detecting that the booster is connected; It has a maximum transmission output storage unit that stores a transmission output, and an amplification level storage unit that stores an amplification level to be amplified. The connection detection circuit detects that the booster is connected to the mobile phone during a call. Then, a level obtained by subtracting the amplification level to be amplified from the maximum transmission output is transmitted to the booster. By controlling the gain of the output amplifier circuit of the booster, the radio communication apparatus characterized by being transmitted by the transmission does not exceed the maximum transmit power is set at the calling start time output. 2. A wireless communication device comprising a mobile phone and a booster, wherein the mobile phone transmits a transmission circuit, an antenna for performing transmission and reception, and transmits a transmission signal transmitted from the transmission circuit to the antenna or the booster. A switch for selectively transmitting the transmission signal, an output control circuit for controlling a transmission output of the transmission circuit, a connection detection circuit for detecting that the booster is connected, and a maximum transmission output that can be transmitted. The booster has a maximum transmission output storage, and an amplification level storage for storing an amplification level to be amplified, wherein the booster amplifies a transmission signal transmitted from the mobile phone, and an amplification of the output amplification circuit. A control circuit for controlling a rate, and the booster is connected to the mobile phone during a call by the connection detection circuit. When detected, a level obtained by subtracting the amplification level to be amplified from the maximum transmission output is transmitted to the booster, and a control circuit of the booster controls an amplification factor of the output amplification circuit so as to amplify the level, A wireless communication device, wherein the transmission is performed with a transmission power that does not exceed a maximum transmission power set at the start of a call.