JP2000004186A - Repeater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repeater which is reducible in cost by excluding the redundancy of the equipment constitution. SOLUTION: This device is equipped with a standby a receiver 6a which performs a signal receiving process for an incoming and outgoing line instead of an active receiver 5b active receiver 5a having got out of order in such a case and a standby transmitter 4a which performs a signal transmitting process for the incoming and outgoing lines instead of an active transmitter 3b or active transmitter 3a having got out of order in such as case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay apparatus which can simplify the apparatus configuration and realize low cost.

[0002]

2. Description of the Related Art A conventional wireless relay device having, for example, a hot standby configuration generally has a configuration as shown in FIG.
Antennas 1a, 1b, high-frequency circuits 2a, 2b, active transmitting devices 3a, 3b, standby transmitting devices 4a, 4b, active receiving devices 5a, 5b, standby receiving devices 6a, 6b, high-frequency switches 7a, 7b, 10a, 10b, and It is composed of high frequency hybrids 8a, 8b, 9a, 9b and the like.

[0003] As shown in FIG.
b includes protection transmitters 4a and 4b, and a working receiver 5a.
Each of a and 5b has a redundant system configuration including spare receiving devices 6a and 6b, and has a configuration in which one more spare transmitting device and one spare receiving device are installed.
The backup transmitters 4a and 4b and the backup receivers 6a and 6b are mainly the active transmitters 3a and 3b or the active receiver 5
It is operated when a and 5b break down, and the frequency of use is low. One active device does not necessarily require one spare device.

[0004]

Since the conventional relay device is configured as described above, the active transmission devices 3a, 3a
b, the standby transmitting devices 4a and 4b
Since the standby receivers 6a and 6b have a redundant configuration with respect to the devices a and 5b, there is a problem that the device configuration is complicated and the cost is increased.

An object of the present invention is to provide a repeater which can eliminate the redundancy of the device configuration and realize low cost.

[0006]

A relay device according to the present invention comprises:
When a failure occurs in one or both of the uplink reception device and the downlink reception device, the failure occurs in one of the uplink reception device and the downlink reception device in which the failure has occurred, and the uplink transmission is performed. When a failure occurs in one of the uplink transmission device and the downlink transmission device, and a failure occurs in one of the uplink transmission device and the downlink transmission device, the uplink transmission device in which the failure has occurred and the downlink transmission. In place of any one of the devices, a standby transmission device that performs signal transmission processing of the uplink and the downlink is provided.

[0007] When a failure occurs in one of the uplink receiving device and the downlink receiving device, the relay device of the present invention is configured to select one of the uplink receiving device and the downlink receiving device in which the failure has occurred. Alternatively, if the standby receiver performs an uplink or downlink signal reception process and a failure occurs in one of the uplink transmission device and the downlink transmission device, the uplink in which the failure has occurred In place of one of the transmitting device and the downlink transmitting device, a standby transmitting device performs signal transmission processing of the uplink and the downlink, and the uplink receiving device, the downlink receiving device, and the uplink No need for backup uplink receiver, downlink receiver, uplink transmitter, and downlink transmitter previously provided in the transmitter and downlink transmitter, respectively. And, to achieve low cost discharge redundancy device configuration.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. The relay device of the present embodiment, when performing wireless relay in the wireless device of the hot standby configuration, the whole part or a part of the function of the spare transmission device that has been provided two in the relay station until now, one unit, Commonly used for relaying upstream and downstream signals, and similarly, for relaying upstream and downstream signals, all or some of the functions of the standby receiver previously provided in the relay station are replaced by one or all. By doing so, the device configuration is simplified and the cost is reduced.

FIG. 1 is a block diagram showing a configuration of a relay apparatus according to the present embodiment. The regenerative relay system receives and demodulates a radio signal, modulates the obtained signal again, and transmits the radio signal. 2 shows the configuration of a hot standby radio apparatus, and the operating radio frequency is set to the transmission frequency f for both uplink and downlink.
1. The reception frequency is f2. This relay apparatus includes antennas 1a and 1b, high-frequency circuits 2a and 2b, an active transmitting apparatus (uplink transmitting apparatus) 3a, an active transmitting apparatus (downlink transmitting apparatus) 3b, a standby transmitting apparatus 4a, and an active receiving apparatus (downlink receiving apparatus). Apparatus) 5a, working receiving apparatus (uplink receiving apparatus) 5b, standby receiving apparatus 6a, high-frequency switches (transmitting apparatus switching means) 7a, 7b, high-frequency switch (receiving apparatus switching means) 12, baseband switch (receiving apparatus switching means) ) 10a, 10b and high frequency hybrid 8a,
8b, a baseband hybrid 9a, 9b, 14, a baseband switch (transmitter switching means) 13, a circulator 11, and the like.

The antennas 1a and 1b transmit and receive uplink signals and downlink signals having the same transmission frequency and reception frequency of the uplink and downlink. The high-frequency circuit 2a is a circuit that supplies a radio signal transmitted from the antenna 1a to the uplink to the antenna 1a, and outputs a downlink radio signal received by the antenna 1a to the high-frequency hybrid 8a. The high-frequency circuit 2b is a circuit that outputs a radio signal transmitted from the antenna 1b to the downlink to the antenna 1b, and outputs a radio signal received from the uplink by the antenna 1b to the high-frequency hybrid 8b. Working transmitter 3
Each of a, 3b, and 4a is composed of a circuit element that modulates a baseband signal, converts the baseband signal to a radio frequency, amplifies the transmission power required for radio transmission, and outputs the amplified signal. The high-frequency switch 7a is connected to the active transmitting device 3a or the standby transmitting device 4a.
Is selected. The high-frequency switch 7b is connected to the active transmitting device 3b or the standby transmitting device 4
This selects one of the wireless signals a.

The high-frequency hybrid 8a is connected to the antenna 1a
Is to branch the radio signal received from the downlink into two and output it to the working receiver 5a and the high-frequency switch 12. The high-frequency hybrid 8b splits a radio signal received by the antenna 1b into two and outputs the signal to the active receiver 5b and the high-frequency switch 12. The baseband hybrid 9a is for branching the radio signal switched by the baseband switch 10b into two and outputting it to the active transmitting device 3a and the baseband switch 13. The baseband hybrid 9b is a baseband switch 1
The wireless signal switched at 0a is branched into two and output to the active transmitting device 3b and the baseband switch 13.

The working receivers 5a, 5b, 6a are:
It comprises a circuit element that converts a received radio signal into an appropriate signal level and frequency, demodulates the signal, and outputs a baseband signal. The baseband switch 10a selects a radio signal from either the working receiver 5a or the standby receiver 6a. The baseband switch 10b is
This is to select a radio signal from either the working receiver 5b or the standby receiver 6a. High frequency switch 12
Is switched at the same time as the baseband switch 10a or the baseband switch 10b, and outputs one of the radio signals branched by the high-frequency hybrid 8a and the high-frequency hybrid 8b to the standby receiver 6a. The baseband switch 13 can be switched at the same time as the high-frequency switch 7a or the high-frequency switch 7b.
a) and one of the radio signals branched by the baseband hybrid 9b is output to the preliminary transmission device 4a. The baseband hybrid 14 branches the output of the standby receiver 6a into two,
a and the baseband switch 10b.

[0013] The transmission switching controller 15 is provided with an active transmission device 3a.
And a high-frequency switch 7a by monitoring a failure alarm signal (hereinafter, referred to as an ALM signal) of the
To select the radio signal of either the working transmitting device 3a or the standby transmitting device 4a. At the same time, the ALM signals of the active transmitting device 3a and the standby transmitting device 4a are monitored and the high frequency switch 7b is switched. At the same time, the ALM signals of the active transmitters 3a and 3b are monitored and the baseband switch 13 is switched.

The reception switching controller 16 is used for the active receiver 5
A, 5b and the ALM signals of the standby receiver 6a are monitored and the high-frequency switch 12 is driven to select a received signal from the high-frequency circuit 2a or the high-frequency circuit 2b and to input the selected signal to the standby receiver 6a. At the same time, baseband switch 1
This is a circuit that drives 0a and 10b and outputs the output of the standby receiving device 6a to the baseband hybrid 9b or the baseband hybrid 9a instead of the working receiving device 5a or the working receiving device 5b.

Next, the operation will be described. Antenna 1
a, a transmission signal on the uplink and a reception signal on the downlink are transmitted in the high-frequency circuit 2a, and the antenna 1b and the high-frequency circuit 2b
In this case, an uplink reception signal and a downlink transmission signal are transmitted. As the switching control of the transmission system, the transmission switching controller 15 controls the ALM signal of the active transmitting device 3a and the ALM signal of the standby transmitting device 4a.
The LM signal is monitored and the high frequency switch 7a is driven to select any one of the wireless signals from the active transmitting device 3a and the standby transmitting device 4a. At the same time, the ALM signals of the standby transmitter 4a and the active transmitter 3b are monitored and the high frequency switch 7b is driven to select one of the active transmitter 3b and the standby transmitter 4a. At the same time, the active transmission device 3
The baseband switch 13 is switched by monitoring the ALM signals a and 3b.

As for the switching control of the receiving system, the receiving switching controller 16 monitors the ALM signals of the active receiving devices 5a and 5b and the standby receiving device 6a and drives the high frequency switch 12 to drive the high frequency circuits 2a and 2b. One of the received signals is selected and input to the standby receiving device 6a. At the same time, the baseband switches 10a and 10b are driven to activate the current receiving device 5a.
Alternatively, the output of the standby receiver 6a is output to the baseband hybrid 9b or the baseband hybrid 9a instead of the active receiver 5b. High frequency hybrid 8
a and 8b split the radio signal received by the antennas 1a and 1b into two and output it to the receiver. The baseband hybrid 14 splits the baseband signal output of the standby receiver 6a into two and outputs it to the baseband switches 10a and 10b. The baseband hybrids 9a and 9b also divide the outputs of the baseband switches 10a and 10b into two and output them to the transmitting device.

The preliminary transmission device 4a includes a high-frequency switch 7a
Alternatively, the high-frequency switch 7b and the baseband switch 13
At the same time, it is possible to operate as a backup transmission device of either the upstream transmission device 3a or the downstream transmission device 3b. The standby receiver 6a includes a high-frequency switch 12, a baseband hybrid 14, and a baseband switch 10a,
With 0b, it can be operated as a standby receiving device of either the working receiving device 5b on the uplink or the working receiving device 5a on the downlink.

Next, the operation will be further described based on the switch operation examples of FIG. 2 and FIG. FIG. 2 is a block diagram showing switching of the high-frequency switch and the baseband switch when the working transmission apparatus and working reception apparatus of the uplink and the downlink are operating normally. First,
Explaining along the signal flow of the uplink, the antenna 1
In the radio signal received at b, a signal component of a required band is extracted by the high frequency circuit 2b (here, the center frequency is f2) and output to the high frequency hybrid 8b. When the active receiver 5b has no equipment failure and no ALM signal is activated, one of the two-branch outputs of the high-frequency hybrid 8b receives a series of reception operations in the active receiver 5b, that is, converts the high-frequency signal to an appropriate signal level and frequency. Convert, demodulate the signal and reproduce the baseband signal. The other signal of the two-branch output is not used here.

The baseband signal of the working receiver 5b passes through a baseband switch 10b, is branched into two by a baseband hybrid 9a, and is output to the working transmitter 3a and the spare transmitter 4a. The working transmitter 3a modulates the baseband signal to convert it to a radio frequency (here, the center frequency is f1), amplifies the signal to the transmission power required for radio transmission, and outputs it. ALM in the active transmitting device 3a
When no signal is activated, the high-frequency switch 7a selects the radio signal output of the active transmitting device 3a, extracts only the required signal band in the high-frequency circuit 2a, and outputs the radio transmission signal to the antenna 1
a.

The radio signal output from the standby transmitter 4a passes through the circulator 11, is blocked by the high-frequency switch 7b and the high-frequency switch 7a, and is not output. However, whether the function as the transmitter is operating normally is monitored by monitoring the ALM signal. Be monitored.

Next, as a downlink signal, a radio signal received by the antenna 1a is taken out of a signal component of a required band by the high frequency circuit 2a (here, the center frequency is set to f2) and output to the high frequency hybrid 8a. You. One of the two-branch outputs is input to the working receiver 5a, and the other is input to the standby receiver 6a via the high-frequency switch 12, and the respective receiving operations are performed. Working receiver 5
a, As for the baseband signal output of the standby receiver 6a, only the output of the active receiver 5a is selected by the baseband switch 10a. Therefore, although the output signal of the preliminary receiving device 6a is not used, the parity bit included in the reproduced baseband signal is detected to monitor whether the receiving device operates normally.

The output signal of the baseband switch 10a is transmitted via the baseband hybrid 9b to the active transmitter 3.
b, and the wireless transmission signal is transmitted from the antenna 1b via the high frequency switch 7b and the high frequency circuit 2b.

As for the operation of the switching controller, the transmission switching controller 15 detects the ALM signal of the active transmitting device 3a and switches the high-frequency switch 7a to the circulator 11 in case of equipment failure.
To the side. Also, the ALM signal of the active transmitter 3b is monitored, and in the case of equipment failure, the high frequency switch 7b is connected to the circulator 11 side. The ALM signal is monitored as a monitor as to whether or not a failure has occurred in the spare transmission device 4a.

The transmission switching controller 15 is connected to the backup transmission device 4
In order to select whether to connect a to the up line or the down line, the A of the active transmitting device 3a and the active transmitting device 3b are selected.
When the ALM is activated in the active transmitting device 3a by the LM signal, the baseband switch 13 is switched to the state shown in FIG. 2 and switched to the baseband hybrid 9a side. In addition, when the ALM is activated on the active transmission device 3b, the baseband switch 13 is switched to a state opposite to the state shown in FIG. 2 and is switched to the baseband hybrid 9b. When both the active transmission devices 3a and 3b are normal, the switch 13 may be undefined.

The reception switching controller 16 is provided with the active receiver 5a,
The ALM signal of 5b is monitored, and when the ALM is activated in the active receiver 5b, the high frequency switch 12 is connected to the high frequency hybrid 8b, and at the same time, the baseband switch 10b is connected to the baseband hybrid 14 side. Further, when the ALM is activated on the active receiver 5a, the high-frequency switch 12 is switched to the state shown in FIG. 2, and at the same time, the baseband switch 10a is switched to the baseband hybrid 14 side.

As an example of the switching control described above, FIG. 3 shows the states of the high-frequency switch and the baseband switch when the active transmitter 3b and the active receiver 5b cause an ALM signal due to a device failure.

The transmission switching controller 15 receives the ALM signal from the active transmission device 3b and switches the high frequency switch 7b to the circulator 11 side. At the same time, the baseband switch 13 is connected to the baseband hybrid 9b.

As a result, the baseband signal input to the active transmission device 3b is also input to the backup transmission device 4a via the baseband hybrid 9b and the baseband switch 13. The preliminary transmission device 4a outputs a required radio signal via the circulator 11 and the high-frequency switch 7b.

On the receiving side, the reception switching controller 16 detects the ALM signal from the working receiver 5b and switches the high frequency switch 12 to the high frequency hybrid 8b, and at the same time connects the baseband switch 10b to the baseband hybrid 14 side. . As a result, the received radio signal input to the active receiver 5b is also input to the standby receiver 6a via the high frequency hybrid 8b and the high frequency switch 12. The auxiliary receiving device 6a reproduces the baseband signal and outputs the baseband hybrid 14, the baseband switch 1
0b to output a baseband signal.

By the above signal switching, the spare transmitting device 4a is operated in place of the failed active transmitting device 3b. Also, when the active transmitting device 3a fails, the spare transmitting device 4a can be operated by signal switching, and the device failure of the active transmitting device is determined by the standby transmitting device 4a except when the active transmitting device 3a and the active transmitting device 3b simultaneously fail. Can be rescued. On the receiving side, similarly, unless the active receivers 5a and 5b fail at the same time, the equipment failure of the active receiver can be remedied by the spare receiver 6a.

As described above, when an abnormality occurs in the active transmitting device 3a, the radio signal from upstream to downstream is transmitted to the antenna 1a.
→ High-frequency circuit 2a → High-frequency hybrid 8a → Active receiving device 5a → Baseband switch 10a → Baseband hybrid 9b → Active transmitting device 3b → High-frequency switch 7b → High-frequency circuit 2b → Relay via antenna 1b. The radio signal from the downstream to the upstream is transmitted to the antenna 1b
→ high frequency circuit 2b → high frequency hybrid 8b → working receiver 5b → baseband switch 10b → baseband hybrid 9a → baseband switch 13 → standby transmitter 4a → circulator 11 → high frequency switch 7a
The signal is relayed on the route from the high-frequency circuit 2a to the antenna 1a.

When an abnormality occurs in the active receiving device 5a, the radio signal from the upstream to the downstream is transmitted from the antenna 1a, the high-frequency circuit 2a, the high-frequency hybrid 8a, the high-frequency switch 12, the preliminary receiving device 6a, and the baseband hybrid 1.
4 → baseband switch 10a → baseband hybrid 9b → working transmitter 3b → high frequency switch 7b →
The signal is relayed on the route from the high-frequency circuit 2b to the antenna 1b. The radio signal from the downstream to the upstream is transmitted from the antenna 1b → the high frequency circuit 2b → the high frequency hybrid 8b → the active receiver 5
b → baseband switch 10b → baseband hybrid 9a → working transmitter 3a → high frequency switch 7a →
The signal is relayed on the route from the high-frequency circuit 2a to the antenna 1a.

When an abnormality occurs in the active receiver 5b, the radio signal from the upstream to the downstream is transmitted from the antenna 1a, the high-frequency circuit 2a, the high-frequency hybrid 8a, and the active receiver 5b.
a → baseband switch 10a → baseband hybrid 9b → working transmitter 3b → high-frequency switch 7b →
The signal is relayed on the route from the high-frequency circuit 2b to the antenna 1b. The radio signal from the downstream to the upstream is transmitted from the antenna 1b, the high-frequency circuit 2b, the high-frequency hybrid 8b, the high-frequency switch 12, the preliminary receiving device 6a, and the baseband hybrid 1.
4 → baseband switch 10b → baseband hybrid 9a → working transmitter 3a → high frequency switch 7a →
The signal is relayed on the route from the high-frequency circuit 2a to the antenna 1a.

When an abnormality occurs in the active transmitting device 3b, the radio signal from the upstream to the downstream is transmitted from the antenna 1a → the high frequency circuit 2a → the high frequency hybrid 8a → the active receiving device 5
a → baseband switch 10a → baseband hybrid 9b → baseband switch 13 → preliminary transmitter 4a → circulator 11 → high frequency switch 7b → high frequency circuit 2b → antenna 1b. Also,
The radio signal from the downstream to the upstream is transmitted from the antenna 1b → the high-frequency circuit 2b → the active receiver 5b → the baseband switch 10
b → baseband hybrid 9a → working transmitter 3a
→ High frequency switch 7a → High frequency circuit 2a → Antenna 1a
Is relayed on the route.

When an error occurs in the active receiving device 5b and the active transmitting device 3b, the active receiving device 5b
The high-frequency switch and the baseband switch are switched so as to satisfy both the case where an abnormality has occurred in b and the case where an abnormality has occurred in the active transmission device 3b.

Therefore, in the present embodiment, the number of backup transmitters and receivers can be reduced by one each as an apparatus configuration at the relay station, so that the redundancy of the apparatus configuration is eliminated and the cost is reduced. There is an effect that realization can be realized.

FIG. 4 shows that, in the operating radio frequency, the transmission frequency of the uplink is f1a and the transmission frequency of the downlink is f1a.
b, a relay apparatus according to another embodiment in which the uplink reception frequency is f2a and the downlink reception frequency is f2b. The parts of the above embodiment different from FIG. 1 are the spare transmitting device 4a ', the spare receiving device 6a', the transmission switching controller (transmission switching control signal generating means).
15 'and a reception switching controller (reception switching control signal generating means) 16'.

In order to cope with different transmission frequencies for the uplink and the downlink, the spare transmitter 4a 'uses a local oscillator 24 of a synthesizer type as shown in FIG. Two types of band-pass filters 26a and 26b having a center frequency f1a and a center frequency f1b are prepared as band-pass filters for removal, and a high-frequency signal of any of the frequencies f1a and f1b can be output by switching with a switch 27. To be configured.

This frequency switching is performed by the transmission switching controller 1
Controlled by a signal from 5 '. On the receiving side, as shown in FIG. 6, the standby receiving device 6a 'can receive and demodulate any of the high-frequency signals f2a and f2b and output a baseband signal by switching the oscillation frequency of the local oscillator 34 of the synthesizer system. I can do it. Switching of the frequency is performed by a control signal of the reception switching controller 16 '.

Next, the operation of this embodiment will be described. In the relay device shown in FIG. 4, the operating radio frequency is f1a for the uplink transmission frequency and f1a for the downlink transmission frequency.
b, the reception frequency of the uplink is different from f2a, and the reception frequency of the downlink is different from f2b. To cope with this, compared to the configuration of FIG. 1, the spare transmitter 4a ′, the spare receiver 6a ′, The switching controller 15 'and the reception switching controller 16' have been changed.

The spare transmission device 4a 'has the configuration shown in FIG. 5, and can output a high-frequency signal of any one of the frequencies f1a and f1b by switching. That is, the baseband signal input to the preliminary transmission device 4a 'is modulated by the modulation circuit 22, mixed with the output of the local oscillator 24 of the synthesizer by the mixer 23, and converted into a high-frequency signal. The frequency of this high-frequency signal can be arbitrarily set to either f1a or f1b by switching the oscillation frequency of the synthesizer local oscillator 24, and the required signal passes through the hybrid 25 and passes through the band-pass filter 26a having the center frequency f1a or the center frequency f1b. The band is limited by the band pass filter 26b. When the frequency of the high-frequency signal output is f1a, the switch 27 selects the bandpass filter 26a. When the frequency of the high-frequency signal output is f1b, the switch 27 selects the bandpass filter 26b. The high-frequency signal selected by the switch 27 is amplified by an amplifier 28 to a required transmission power and then output. The switching of the frequency of the high-frequency signal output is performed by the transmission switching control signal output from the transmission switching controller 15 ′ in FIG. For this purpose, the transmission switching controller 15 'includes a transmission switching control signal generating means (not shown) that generates the transmission switching control signal and outputs the transmission switching control signal to the backup transmission device 4a'.

On the receiving side, the standby receiving device 6a 'has the configuration shown in FIG. 6, in which the input high-frequency signal is amplified by the low-noise amplifier 32 and then output by the synthesizer local oscillator 34 and the mixer 33. After being mixed and band-limited by the band-pass filter 35, the signal is input to the demodulation circuit 37 via the amplifier 36, and the baseband signal is reproduced and output.

Here, the frequency of the high-frequency signal input to the standby receiving device 6a 'is f2a or f2b, and the oscillation frequency of the local oscillator 34 of the synthesizer is controlled by the reception switching control shown in FIG. Vessel 1
Switching is performed by the reception switching control signal output from 6 '. For this reason, the reception switching controller 16 'includes a reception switching control signal generating means (not shown) that generates the reception switching control signal and outputs the signal to the standby receiving device 6a'. Other operations are the same as those described in the above embodiment.

As described above, according to the other embodiment, the transmission frequency of the uplink is f1a, the transmission frequency of the downlink is f1b, the reception frequency of the uplink is f2a, and the reception frequency of the downlink is f2b. As a device configuration in a relay station of a certain operating radio frequency, the number of backup transmitting devices and receiving devices can be reduced by one each, and the effect of eliminating the redundancy of the device configuration and realizing low cost can be achieved. is there.

FIG. 7 shows that the uplink transmission frequency is f1a and the downlink transmission frequency is f1 as in the other embodiments.
FIG. 5 is a block diagram showing a relay apparatus according to another embodiment having a configuration different from that of FIG. 4 in a case where the reception frequency of the uplink is f2a and the reception frequency of the downlink is f2b. In the relay device according to this another embodiment, the configurations of the spare transmitting device 4a ′ and the spare receiving device 6a ′ in FIG. 4 are changed to the spare transmitting device 4a ″ and the spare receiving device 6a ″.

The spare transmission device 4a ″ has a modulation circuit (uplink high-frequency signal generation means, downlink high-frequency signal generation means) 2 based on the baseband signal input according to the configuration shown in FIG.
2 and outputs two high-frequency signals of frequencies f1a and f1b, and the standby receiver 6a ″ has a configuration shown in FIG.
The high-frequency signals 2a and f2b are switched, and the demodulation circuit (reception processing means) 37 can demodulate and receive the baseband signal.

Next, the operation of this embodiment will be described. In the relay apparatus according to the present embodiment, the uplink transmission frequency is f1a, the downlink transmission frequency is f1b, the uplink reception frequency is f2a, and the downlink reception frequency is f2b.
In order to cope with this, as shown in FIG. 8, the preliminary transmission device 4a ″ has two frequencies f1a and f1b.
Transmitting high-frequency circuits (uplink high-frequency signal generating means) 3
0a, transmission high-frequency circuit (downlink high-frequency signal generation means)
The standby transmitting device is provided with 30b, and the standby receiving device 6a '' is provided with two receiving high-frequency circuits 39a and 39b having a frequency f2a and a frequency f2b, as shown in FIG. Thus, functions similar to those of the other embodiments can be realized.

In FIG. 7, the pre-transmission device 4a '' outputs two transmission high-frequency signals of the frequency f1a and the frequency f1b, so that the circulator 11 shown in FIG. 4 becomes unnecessary, and the transmission output is directly transmitted to the high-frequency switch 7a. , 7b
Connected to.

As described above, according to this alternative embodiment, the transmission frequency of the uplink is f1a, the transmission frequency of the downlink is f1b, the reception frequency of the uplink is f2a, and the reception frequency of the downlink is f2b. As a device configuration in a relay station of a certain operating radio frequency, the circulator 11 shown in FIG. 4 can be made unnecessary, and the number of backup transmitters and receivers can be reduced by one each from the conventional device, and the redundancy of the device configuration can be reduced. And the cost can be reduced.

[0050]

As described above, according to the present invention, the uplink receiving device, the downlink receiving device, the uplink transmitting device, and the backup uplink receiving device provided in the downlink transmitting device, A downlink receiving device, an uplink transmitting device, and a downlink transmitting device, the uplink receiving device, a standby receiving device shared by the downlink receiving device,
The uplink transmission device, back-up by a backup transmission device shared by the downlink transmission device, and the uplink transmission device, the downlink reception device, the uplink transmission device, and the downlink transmission device, Since the configuration is designed to cope with a certain abnormality, there is an effect that the redundancy of the device configuration is eliminated and the cost can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing switching between a high-frequency switch and a baseband switch when an active transmission device and an active reception device of an uplink and a downlink are operating normally in the relay device according to the embodiment of the present invention; is there.

FIG. 3 is a diagram showing a case where a device failure occurs in a working transmitting device and a working receiving device in a relay device according to an embodiment of the present invention;
FIG. 4 is a block diagram illustrating states of a high-frequency switch and a baseband switch when an LM signal is activated.

FIG. 4 is a block diagram showing a relay device according to another embodiment of the present invention.

FIG. 5 is a block diagram illustrating a configuration of a standby transmission device in a relay device according to another embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of a standby receiving device in a relay device according to another embodiment of the present invention.

FIG. 7 is a block diagram showing a relay device according to another embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration of a standby transmission device in a relay device according to another embodiment of the present invention.

FIG. 9 is a block diagram illustrating a configuration of a standby receiving device in a relay device according to another embodiment of the present invention.

FIG. 10 is a block diagram showing a conventional relay device.

[Explanation of symbols]

3a ... working transmission device (uplink transmission device), 3b ...
Working transmitter (downlink transmitter), 4a ', 4
a '', 4a..., a spare transmitting device, 5a..., a working receiving device (downlink receiving device), 5b..., a working receiving device (uplink receiving device), 6a, 6a ′, 6a ″. , 7a, 7b ... high frequency switch (transmitting device switching means), 10a, 10b ... baseband switch (receiving device switching means), 12 ... high frequency switch (receiving device switching means), 13 ... baseband switch (receiving) Device switching means), 15 '... transmission switching controller (transmission switching control signal generation means), 16' ... reception switching controller (reception switching control signal generation means), 22 ... modulation circuit (uplink high-frequency signal generation) Means, downlink high-frequency signal generation means), 30a
…… Transmission high frequency circuit (uplink high frequency signal generation means),
30b: transmission high-frequency circuit (downlink high-frequency signal generation means), 37: demodulation circuit (reception processing means), 38: high-frequency switch (reception processing means).

Claims (4)

[Claims] An uplink receiving apparatus and an uplink transmitting apparatus for an uplink, a downlink receiving apparatus and a downlink transmitting apparatus for a downlink, and a relay for relaying an uplink signal and a downlink signal. In the device, when a failure occurs in one of the uplink reception device and the downlink reception device, the failure occurs instead of one of the uplink reception device and the downlink reception device in which the failure has occurred. A standby receiving apparatus that performs signal reception processing of the uplink and the downlink; and when a failure occurs in any of the uplink transmission apparatus and the downlink transmission apparatus, the uplink in which the failure has occurred. A relay device comprising, instead of one of the transmission device and the downlink transmission device, a backup transmission device that performs signal transmission processing on the uplink and the downlink. apparatus. 2. Monitoring one of the uplink receiving device, the downlink receiving device, and the standby receiving device to protect one of the failed uplink receiving device and the downlink receiving device. A receiving device switching unit including a reception switching controller that switches to a receiving device, and the uplink transmission device, the downlink transmission device, and the standby transmission device are monitored to monitor the failure of the uplink transmission device and the downlink transmission device. 2. The relay device according to claim 1, further comprising a transmission device switching unit that includes a transmission switching controller that switches one of the line transmission devices to a standby transmission device. 3. The reception switching controller, based on a result of switching to a standby receiver performed by monitoring for the occurrence of the failure, converts a high-frequency signal input to the standby receiver into an uplink signal. Depending on whether the signal is a downlink signal or not, the spare receiving device generates a reception switching control signal for controlling a local transmission signal frequency for extracting a baseband signal from the high-frequency signal, and outputs the signal to the spare receiving device. The transmission switching controller includes a baseband signal input to the backup transmission device based on a result of switching to the backup transmission device performed by monitoring for the occurrence of the failure. According to whether the signal is an uplink signal or a downlink signal, the base transceiver station transmits the baseband signal to the uplink, 3. A transmission switching control signal generating means for generating a transmission switching control signal for controlling a local transmission signal frequency for converting the frequency to a high frequency signal, and outputting the transmission switching control signal to the backup transmission device. Relay device. 4. The standby receiving device, in place of one of the uplink receiving device and the downlink receiving device in which a failure has occurred, transmits a high-frequency signal input from the uplink and the downlink by a reception switching controller. A reception processing unit that converts a baseband signal according to the uplink and downlink based on a switching result, wherein the preliminary transmission device generates a high-frequency signal to be output to the uplink based on the baseband signal Uplink high-frequency signal generating means,
3. The relay device according to claim 2, further comprising: a down-link high-frequency signal generating unit that generates a high-frequency signal to be output to the down-link based on the baseband signal.