JPH0786989A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To surely perform an operation for transmission power control by inputting a reception input voltage and transmission voltage control data outputted from a receiver in current use and a spare receiver and the switching signal of a switching control part to a transmission power control part. CONSTITUTION:The transmission power control part 22 performs the transmission power control by using the reception input voltage 15 and the transmission power control data 16 obtained from the receiver 11A side in current use when the control signal 19 of the switching controller 12 of the switching control part 14 selects the receiver 11A in current use side. Also, the control part 22 performs the operation for transmission power control by using the reception input voltage 20 and the transmission power control data 21 inputted from the spare receiver 11B side when the signal 19 selects the spare receiver 11B side. Consequently, it is possible to surely perform the operation for transmission power control even when a fault occurs in either the receiver 11A or 11B or maintenance is applied to either of them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity digital radio communication transmitter / receiver, and more particularly to a radio communication device having a hot standby system and having a transmission power control function.

[0002]

2. Description of the Related Art In a large-capacity digital wireless communication system, a dual structure having an active and a standby device is often adopted in order to improve the reliability of the line. In this duplex configuration, both the active and standby devices are in the operational state,
There is a hot standby method in which both the standby device and the standby device are switched to the active state and are switched between the active and standby modes.

FIG. 3 shows a transmission power control device (ATPC: Automati) in the hot standby system.
c Transmitter Power Controller
1) shows a conventional configuration of a digital wireless communication device having Now, it is assumed that the present wireless communication device is facing and communicating with another wireless communication device having exactly the same configuration as this configuration.

In the figure, a high frequency signal transmitted from another wireless communication device is received by an antenna 7, passes through a transmission / reception sharer 6, and then is distributed by a distributor 8 to a working receiver 11A.
And the auxiliary receiver 11B. Working receiver 11A
The received signal, which is composed of the receiving unit 9a and the demodulator 10a and is input to the active receiver 11A, is demodulated by the demodulator 10a into received data composed of main data and transmission power control data. This main data is input to the switch 12.

On the other hand, with respect to the spare receiver 11B, only the main data is input to the switch 12, just like the active receiver 11A. The switching device 12 is a switching signal 1 of the switching control unit 14.
9 selects either the working receiver 11A or the spare receiver 11B, and the selected side becomes the output data of this apparatus.

On the other hand, the input data input to this device is
The distributor 1 distributes the current transmitter 4A and the standby transmitter 4B. In the active transmitter 4A, the data distributed by the data distributor 1 is input to the modulator 2a,
After being digitally modulated, the signal is input to the RF switch 5 after being converted into a high frequency band signal by the transmitter 3a.

Similarly, the output signal of the spare transmitter 4B is input to the RF switch 5. The RF switch 5 is operated by the switching control unit 14 so that the active transmitter 4A or the standby transmitter 4B is used.
Output signal is selected, and the output signal passes through the transmission / reception sharer 6 and is then output to another wireless communication device via the antenna 7.

The operation of the transmission power controller 13 (ATPC) will be described below. That is, in the active receiver 9a, the reception carrier level is detected, and the reception input voltage (RSL: Receiving) corresponding to the reception input level is detected.
Signal Level 15 is output to the ATPC 13. The ATPC 13 outputs data corresponding to the difference between the value of the RSL 15 and the reference value corresponding to the standard input electric field to the modulators 2a and 2b as transmission power control data.

These transmission power control data, together with the main data, are modulated by the modulator 2a and the modulator 2b, and then transmitted to another station on the side selected by the RF switch 5. The transmission power control data is used for the transmission power control operation of another station.

On the other hand, the transmission power control data created by the ATPC of another station is input to this apparatus as a reception signal and demodulated by the active demodulator 10a to obtain the transmission power control data 16. The ATPC 13 compares the transmission power control data 16 with the reference data. Since the difference data obtained by this comparison is the difference between the standard electric field input of another station and the received electric field, the ATPC 13 controls the transmission power of this device so as to compensate for the difference. That is, the transmission power control voltage 17 is input to the transmitter 3a and the transmitter 3b to control the amplification degree of each. The control of the amplification degree can be easily controlled by using a pin attenuator.

[0011]

In the conventional radio communication apparatus, as described above, the receiving input voltage 15 is input from the receiving section 9a on the working receiver 11A side, and the transmission power control data 16 is input from the demodulator 10a to the ATPC 13 for transmission. The power control operation was performed, and the reception signal on the side of the standby receiver 11B was not used.

When the working receiver 11A is out of order or in a maintenance state, the switching controller 12 causes the switching unit 12 to operate as the standby receiver 11A.
Switching to the B side, output data selects the side of the preliminary receiver 11B. However, since neither the reception input voltage nor the transmission power control data is input to the ATPC 13 on the side of the auxiliary receiver 11B, there is a problem that the data required for the transmission power control cannot be obtained and the transmission power control does not operate properly.

As a result, there has been a problem of interference with other lines or deterioration of the signal of the own station.

[0014]

The wireless communication device of the present invention includes an antenna capable of transmitting and receiving a high frequency signal, a distributor for distributing a reception signal received through the antenna to a working signal and a backup signal, and a distributor. The input receiver and the standby receiver that input and demodulate each signal, the switcher that switches the output signal of each receiver to output data, the distributor that divides the input data into two, and the distributed input signals The active transmitter and the standby transmitter that are high-frequency modulated signals, the RF switching device that switches the output signal of each transmitting unit, the switching control unit that controls the reception system switching device and the RF switching device, and the switching control unit The control signal for the receiving system switcher, the receiving input voltage of the working receiver and the standby receiver, and the transmission power control data are input, and the transmission power of the switched system even when the working receiver is switched to the standby receiver. control And a transmission power control unit which performs transmission power control operation based on the over data.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram of a wireless communication device according to an embodiment of the present invention.

The present embodiment is different from the conventional configuration in that
From the receiver 9b of the spare receiver 11B, the reception input voltage 20,
That is, the transmission power control data 21 and the switching signal 19 for controlling the switch 12 of the switching control unit 14 are input to the transmission power control unit (ATPC) 22 from the demodulator 10b.

When a reception signal including transmission power control data obtained by the ATPC of another station is received by this device, the reception input voltage 15 and the transmission power control data 16 are input from the active receiver 11A to the ATPC 22. It

The reception input voltage 20 and the transmission power control data 21 are input to the ATPC 22 from the auxiliary receiver 11B.

Further, the ATPC 22 has a switching control unit 14
The control signal 19 of the switching controller 12 is input, and this signal is information for switching in the device failure or maintenance state of the working receiver 11A or the standby receiver 11B.

The ATPC 22 selects either the reception input voltage 15 and the transmission power control data 16 of the working receiver 11A or the reception input voltage 20 and the transmission power control data 21 of the standby receiver 11B by the control signal 19, Transmission power control operation is performed.

FIG. 2 shows an internal block diagram of the ATPC 22. In the figure, the active transmission power control data 16 or the standby transmission power control data 21 is the selection circuit 2
Either one is selected by 3 and is input to the transmission power control circuit 25, and then the transmission power control voltage 17 is output.

Further, either the working reception input voltage 15 or the preliminary reception input voltage 20 is selected by the selection circuit 24 and input to the transmission power control circuit 25, and then the transmission control data 18 is output.

The selection circuits 23 and 24 are both switching signals 1
It is controlled by 9 simultaneously.

[0024]

As described above, according to the present invention, the reception input voltage 15 and the transmission power control data 16 of the working receiver 11A and the reception input voltage 20 and the transmission power control data 21 of the standby receiver 11B are switched. Switching signal 19 of control unit 14
By inputting and to the transmission power control device 22, when the output of the switch 12 selects the working receiver 11A side, the reception input voltage 15 and the transmission power control data 16 obtained from the 11A side are input. Used for transmit power control,
When the output of the switch 12 selects the auxiliary receiver 11B side, the transmission power control operation is performed using the reception input voltage 20 and the transmission power control data 21 obtained from the 11B side.

As a result, even if either the working receiver 11A or the spare receiver 11B is in a failure or maintenance state, the transmission power control can be operated properly.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram of a transmission power control unit in FIG.

FIG. 3 is a block diagram of a conventional wireless communication device.

[Explanation of symbols]

 1, 8 Distributor 2a, 2b Modulator 3a, 3b Transmitter 4A, 4B Transmitter 5 RF switch 6 Transmitter / receiver 7 Antenna 9a, 9b Receiver 10a, 10b Demodulator 11A, 11B Receiver 12 Switcher 13, 22 transmission power control unit (ATPC) 14 switching control unit 15, 20 reception input voltage 16, 18, 21 transmission power control data 17 transmission power control voltage 19 switching signal 23, 24 selection circuit 25 transmission power control circuit

Claims (2)

[Claims] 1. A wireless communication device comprising the following (a), (b) and (c): (A) A receiver having a dividing means for dividing the received signal into two, a receiving input level detecting means for receiving each of the divided signals, a demodulating means, and a switching means for selecting one of the demodulated outputs. (B) A transmitter having a distribution means for distributing the input data into two, a modulation means for respectively modulating the distributed input data, a transmission means, a transmission level varying means, and a switching means for selecting one of the transmission outputs. (C) Means for converting the output of each reception input detection means into transmission power control data and inputting it to the transmitter, and inputting the transmission power control data obtained by demodulating each received signal by the demodulation means. , And a transmission power control section having means for controlling the transmission level varying means based on this. 2. Inputting the outputs of two types of receiving input detecting means and the transmission power control data contained in the received signal,
A transmission power control unit that operates in conjunction with the demodulation output switching unit and uses the output of the reception input detection unit and the transmission power control data of the same system as the selected side of the demodulation output and performs the transmission power control operation. The wireless communication device according to item 1.