JP2655083B2 - Transmission power control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission power control method in a radio apparatus, and more particularly to a different polarization same frequency interference elimination method for transmitting signals of the same frequency with different polarizations such as horizontal polarization and vertical polarization. Hereinafter, the transmission output control method applied to the XPIC method).

[0002]

2. Description of the Related Art An example of a conventional transmission output control system in the XPIC system is shown in a block diagram of FIG. 4, which is an example described in Japanese Patent Application Laid-Open No. 4-137934.
In this example, a signal of the same frequency is transmitted and received between the A station and the B station with the horizontal polarization (H polarization) and the vertical polarization (V polarization), and the signal received by the B station is used as the signal. 5 shows a configuration example for controlling the transmission output of the A station based on the above. Station A has a modulator (VMOD) 11 for transmitting and receiving with V polarization and a transmitter (VT).
X) 12, receiver (VRX) 13 and demodulator (VDEM)
14, a modulator (HMOD) 15 and a transmitter (HTX) 16, a receiver (HRX) 17, and a demodulator (HDEM) 18 for performing transmission and reception with H polarization. And here, an automatic transmission output controller (ATP) for controlling the transmission output of the transmitter (VTX) 12 of the V polarization.
CTX) 19 is provided.

Similarly, a station (B) has a modulator (VMOD) 21 and a transmitter (VTX) 2 for transmitting and receiving with V polarization.
2. A receiver (VRX) 23 and a demodulator (VDEM) 24 are provided, and a modulator (H
MOD) 25, transmitter (HTX) 26, receiver (HR)
X) 27 and a demodulator (HDEM) 28 are provided. And here, an automatic transmission output controller (ATPCRX) 29 for transmitting a transmission output control signal to the station A based on the reception input level information (RSL) received by the V polarization receiver (VRX) 23. Is provided.

Here, the ATPCRX29 is shown in FIG.
As shown in (a), a detector 101 that compares received input level information (VRSL, HRSL) obtained by each of VRX and HRX to detect lower-level information, and uses the detected level information as a reference. It comprises a comparator 102 for comparing with level information (RSLth) and a controller 103 for outputting a transmission output control signal based on the comparison result.

[0005] Further, the ATPCTX19 is shown in FIG.
As shown in (b), a controller 401 that generates control information (TXPWRCONT) for controlling respective transmission outputs of VTX and HTX based on the received transmission output control signal.
And

In this conventional configuration, the B station uses ATPCR
At X29, V-polarized and H-polarized signals from station A are received, and detector 101 compares the received VRSL and HRSL to detect a low-level signal, and compares the detected level signals. In the detector 102, the reference level is compared. Then, based on the comparison result, the controller 103
A transmission output control signal DATA for raising or lowering the transmission output at the station is generated.
The TA is modulated in the VMOD 21 and transmitted to the A station through the VTX 22. At this time, the transmission output control signal is transmitted to the A station using the radio additional bit.

At the station A, the transmission output control signal is set to VRX
13 and demodulates it by the VDEM 14.
In the RX19, the controller 401 generates the transmission output control information TXPWRCONT based on this, and based on the transmission output control information TXPWRCONT, the VTX12 and the HTX
The transmission power of each of the sixteen is controlled. Thus, A
The transmission output level ratio between the VTX12 and the HTX16 at the antenna output at the station can be kept substantially constant.

As a result, V at the antenna input of station B
The transmission output level can be controlled without changing the amount of interference to the H polarization and the amount of interference to the H → V polarization.
It is possible to prevent deterioration of the amount of interference between different polarizations due to TPCRX and prevent deterioration due to thermal noise.

Here, the ATPCRX29 of the station B and
As a modification of the ATPCTX19 of the station A, FIG.
The ones shown in FIG. 6B have been proposed. FIG.
In the ATPCRX29 of (a), the controller 501 functions to transmit the V-polarized and H-polarized RSL information VRSL and HRSL directly to the A station as the transmission output control signal DATA. Also, the ATPCTX1 of FIG.
9, the controller 601 converts the received transmission power control signal into the original RSL information,
The low level signal of L and HRSL is detected, the low level signal is compared with the reference level signal RSLth in the comparator 603, and the transmission output control information TXPWRCONT in which the controller 604 controls the transmission output level is created based on the comparison result. In addition, the configuration is such that the VTX 12 and the HTX 16 are controlled.

In this way, the station A can obtain the VRSL and HRSL of the station B as they are,
There is an advantage that the reception state at the B station can be directly monitored, and transmission output control with high accuracy can be performed.

In the above-described transmission output control, especially in the ATPCTX 19, when transmitting a transmission output control signal from the station B to the station A, the signal input to the VRX 13 is reduced and the signal resulting from waveform distortion caused by interference is transmitted. Due to the deterioration, an error occurs in the control signal, which may cause erroneous control of the transmission output level. In order to prevent this, the station A normally receives the transmission output control signal from the station B only a plurality of times and compares the plurality of received transmission output control signals to confirm whether the reception in the VRX 13 is correct or not. In some cases, transmission power control information is generated based on a correctly received transmission power control signal to control the transmission power level. The above description shows an example in which the transmission output from the station A to the station B is controlled. However, the same control method is applied to the transmission output control from the station B to the station A.

[0012]

According to this conventional transmission output control method, when the transmission output control from the station A to the station B is performed, the transmission line of the control signal transmitted from the station B to the station A is provided by a V line. Since the control signal has only the polarization side, when a noise occurs in the control signal or a bit error occurs in the transmission line, a malfunction of the transmission output level control in the A station may occur. Further, when the V polarization transmission system (VMOD22, VTX21) of the B station or the V polarization side reception system (VRX13, VDEM14) of the A station fails, the transmission output control from the B station to the A station is performed. Cannot be transmitted, and the transmission output control of the VTX12 and the HTX16 in the station A cannot be executed.

The AT shown in FIGS. 6 (a) and 6 (b)
In the system using PCRX or ATPCTX, in addition to the above-mentioned problems, when transmitting VRSL or HRSL, it is necessary to increase the number of DATA bits to be transmitted, and by increasing the number of bits, the information transmission speed in the system is increased. (Transmission frequency) increases. Furthermore, A
In the station, in the method of controlling the transmission output after receiving the transmission output control signal a plurality of times, the transmission output control takes time, and when the reception input level is reduced during the operation of the control, To cope with this, the transmission output cannot be increased, and at that time, there is a problem that the reception signal at the B station is deteriorated or unreceivable.

[0014]

SUMMARY OF THE INVENTION An object of the present invention is to provide a communication system in which a failure occurs in either a V-polarized or H-polarized transmission line or a transmission / reception system.
An object of the present invention is to provide a transmission output control method capable of executing transmission output control. It is another object of the present invention to provide a transmission output control method which reduces the time required for transmission output control. Further, an object of the present invention is to provide a transmission output control system in which the number of bits of information required for transmission output control is reduced to improve the information transmission speed.

[0015]

According to the transmission power control method of the present invention, a receiving station is created based on one of the reception input level information of each of two different polarizations. Means for transmitting the transmission power control signal to the transmitting station in each polarization, and the transmitting station outputs the output of the transmitter for each polarization based on the transmission power control signal received in each polarization. Controlling means .

Further, the receiving station includes means for detecting low-level reception input level information among the reception input level information of two different polarizations, and comparing the detected reception input level information with a reference level. And a means for generating a transmission output control signal for increasing or decreasing the transmission output of the transmitting station based on the comparison result.

Further, the transmitting station compares the contents of the transmission output control signals received with the two different polarizations, and outputs the transmission output control information immediately when the two coincide with each other to control the output of the transmitter. If the two do not match, a means is provided for confirming the contents of the transmission output control signal a predetermined number of times.

Alternatively, the receiving station includes means for alternately selecting the received input level information respectively received in two different polarizations, and means for transmitting the selected received input level information to the transmitting station in each polarization. And Note that two different
As the two polarizations, for example, a horizontal polarization and a vertical polarization are used.

[0019]

The receiving station transmits the transmission power control signal to the transmitting station using two different polarizations, and the transmitting station controls the transmission power based on the transmission power control signal received for each polarization. Even if a failure occurs in any of the transmission paths of the waves or in any of the transmission / reception systems of the respective polarizations of the transmitting station and the receiving station, the transmission output control signal is reliably transmitted and the transmission output control is performed. It is possible to secure.

Further, by comparing the contents of the transmission output control signals received for the respective polarizations and immediately executing the transmission output control when they match, the transmission output control can be executed in a short time. . Furthermore, by transmitting the transmission power control signal alternately with different polarizations, it is possible to reduce the amount of transmission data and increase the transmission efficiency as compared with the case where the transmission power control signal is transmitted simultaneously with both polarizations. Become.

[0021]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system block diagram according to an embodiment of the present invention. In this example, similarly to the conventional example shown in FIG. 2 shows a configuration example in which signals are transmitted / received by using (polarization) and vertical polarization (V polarization), and the transmission output of station A is controlled based on the signal received by station B. In addition, in each component of the stations A and B, parts equivalent to those in the conventional example of FIG.

In FIG. 1, a modulator (VMOD) 11 and a transmitter (VTX) for transmitting and receiving V polarized waves are provided to the A station.
12. Receiver (VRX) 13 and demodulator (VDEM) 14
(HMOD) 15, a transmitter (HTX) 16, and a receiver (H
RX) 17 and a demodulator (HDEM) 18 are provided. Here, an automatic transmission output controller (ATPCTX) 19 for controlling the transmission output of the V polarization transmitter (VTX) 12 and the transmission output of the H polarization transmitter (HTX) 16 is provided.

Similarly, the B station has a modulator (VMOD) 21 and a transmitter (VTX) 2 for transmitting and receiving V polarized waves.
2. A receiver (VRX) 23 and a demodulator (VDEM) 24 are provided, and a modulator (H
MOD) 25, transmitter (HTX) 26, receiver (HR)
X) 27 and a demodulator (HDEM) 28 are provided. Here, the reception input level information (VRSL) received by the V polarization receiver (VRX) 23 and the H polarization receiver (H
RX) Received input level information (HRSL) received at 27
An automatic transmission output controller (ATPCRX) 29 for transmitting a transmission output control signal to the A station based on the above is provided.

In addition to the above configuration, in the configuration of the present invention, B
In the station, ATPCRX29 to VMOD21, H
Transmission output control data (VDAT
A, HDATA) to transmit a DATA line (DATA
21, DATA22). At station A, the VDEM14 and HDEM15 send AT
Transmission output control data (VDATA, HD) to PCTX19
ATA) (DATA11, D)
ATA12) and the frame synchronization detection alarm information (VAL) detected by each of the VDEM14 and HDEM18.
M, HALM) transmission alarm line (ALM1)
1, ALM12).

The ATPCRX29 of the station B is shown in FIG.
This is the same as the conventional configuration shown in FIG. In other words, as shown in FIG. 2A, a detector 101 that compares the received input level information (VRSL, HRSL) obtained for each of VRX and HRX to detect information on the lower level side, and It comprises a comparator 102 for comparing the level information with reference level information (RSLth), and a controller 103 for outputting a transmission output control signal based on the comparison result.

The ATPCTX 19 of the station A is shown in FIG.
As shown in (b), a data comparator 201 that determines whether or not the contents of VDATA and HDATA input through DATA11 and DATA12 match, and an ALM.
VALM and HAL input through 11 and ALM12
A selector (SW) 202 for selecting one of VDATA and HDATA based on the result of M;
And a signal (TXPWRCONT) for controlling the transmission output level of the VTX12 and the HTX16 based on the DATA output from the SW202.
Is created.

In this configuration, the B station receives the V-polarized and H-polarized signals from the A station, and the detector 1 of the ATPCRX 29
At 01, the received VRSL and HRSL are compared to detect a low-level signal, and the comparator 102 compares the detected level signal with a reference level RSLth. Then, based on the comparison result, the controller 103 generates a transmission output control signal for raising or lowering the transmission output at the station A, and transmits this transmission output control signal to the VM.
Modulated at OD22 and HMOD25 respectively, VT
The signal is transmitted to the A station with the V polarization and the H polarization through X21 and HTX26. At this time, the transmission output control signal is transmitted to the A station using the radio additional bit.

At the station A, the transmission output control signal is set to VRX
13, received by the HRX17, and received by the VDEM14, HD
The signal is demodulated by the EM 18 and VDATA, HDATA, VALM, and HALM are sent to the ATPCTX 19, respectively. A
The PTCTX 19 generates transmission output control information (TXPWRCONT) based on this, and controls the transmission output of each of the VTX 12 and the HTX 16 based on the transmission output control information.

At this time, the APTCTX 19 monitors the VALM and the HALM in the SW controller 203. For example, when the VALM outputs an out-of-synchronization alarm,
The SW 202 selects HDATA. When the HALM outputs an out-of-synchronization alarm, the SW 202
Select ATA. Further, when both the VALM and the HALM output an out-of-synchronization alarm or do not output the alarm, a predetermined DATA (VDAT
A or HDATA). And the controller 20
4 is VTX1 based on the output DATA of the SW202.
2 and control information T for controlling the transmission output level of HTX 16
Create and output XPWRCONT.

As a result, V at the antenna input of station B
The transmission output level can be controlled without changing the amount of interference to the H polarization and the amount of interference to the H → V polarization.
It is possible to prevent the TPCRX 29 from deteriorating the amount of interference between different polarizations and to prevent deterioration due to thermal noise. In this case, in this embodiment, since the transmission output is controlled based on the reception input level on the lower side of the transmission path, the transmission output is always controlled on the higher output side. It is ensured that the signal from the station is received reliably.

At this time, a failure occurs in one of the transmission lines of the V polarization and the H polarization transmitted from the station B to the station A, or a failure occurs in one of the transmission and reception systems. Even during maintenance of any one of these transmission / reception systems, transmission of the transmission output control signal from the station B to the station A can be ensured, and the transmission output at the station A can be controlled.

In this embodiment, the APTCTX is used.
19, when the transmission output control information is created as described above, the VDATA received by the data comparator 201 is
And the contents of HDATA. If the contents of both DATAs match, it can be said that there is no data error in the transmission path from station B to station A. Therefore, in this case, the transmission output control information (TXPWRCONT) is created immediately after one data reception, and the control time of the VTX 12 and the HTX 16 by the transmission output control information can be reduced.

On the other hand, when the data comparator 201 compares VDATA and HDATA and finds that the two contents do not match, it is assumed that a data error has occurred in the transmission path from the station B to the station A. That is, transmission output control information is created based on a predetermined plurality of times of data reception.

FIG. 3 is a diagram showing another embodiment of the present invention, in which ATPCTX and ATPCRX in the embodiment of FIG.
FIG. 3 is a diagram showing the configuration of FIG. ATPCTX19 of FIG.
Has the same configuration as the ATPCTX shown in FIG. 2B of the embodiment of FIG. On the other hand, the ATPCRX2 of FIG.
9 is the V output from VRX23 and HRX27 of station B.
Selector (SW) 30 for alternately selecting RSL and HRSL
1 and a controller 302 for converting the selected RSL into predetermined data (DATA). This controller 30
2, a control signal (TXPWRCONT) for controlling the transmission output levels of the transmitters VTX12 and HTX16 of the A station is created based on the VRSL and VRSL transmitted alternately, and the transmission system for V-polarization and H-polarization is generated, respectively. Output to

Thus, VRSL and HR are used as RSLs.
By transmitting the SL alternately to the A station using the transmission systems of the V polarization and the H polarization, respectively, compared to the case where the RSL information is transmitted simultaneously with the V polarization and the H polarization, respectively. The number of bits of DATA to be transmitted to the A station can be reduced.

In the above-described embodiment, the system for controlling the transmission output for transmitting from the station A to the station B has been described. However, in order to control the transmission output for transmitting from the station B to the station A, It goes without saying that each of the stations A and B has a configuration according to the above-described embodiment, particularly a configuration including ATPCRX and ATPCTX.

[0037]

As described above, according to the present invention, the receiving station transmits the transmission power control signal to the transmitting station using two different polarizations, and the transmitting station transmits the transmission power control signal received at each polarization. In order to control the transmission output based on the transmission power, even if a failure occurs in any of the transmission paths of the respective polarizations or a failure occurs in any of the transmission and reception systems of the respective polarizations of the transmitting station and the receiving station, the transmission output control is performed. Signals can be transmitted reliably and transmission output control can be ensured.

Here, the receiving station detects the low-level receiving input level information among the receiving input level information of the two different polarizations, and based on the detected receiving input level information, determines the transmitting station's information. Since the transmission output control signal for controlling the transmission output is created and transmitted to the transmission station, the transmission output is controlled at the transmission station based on the reception input level on the lower side of the transmission path. In other words, the transmission output is always controlled to the high output side, and it is possible to reliably perform signal reception at the receiving station.

Further, the transmitting station compares the contents of the transmission power control signals received with the two different polarizations, and outputs the transmission power control information immediately when the two coincide with each other, and outputs the output of the transmitter. By controlling, transmission output control can be executed in a short time.

Further, the receiving station alternately selects the received input level information received with two different polarizations, and transmits the selected received input level information to the transmitting station with each polarization. As compared with the case where the transmission output control signal is transmitted simultaneously with both polarizations, the amount of transmission data can be reduced and the transmission efficiency can be increased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a transmitting station and a receiving station according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of transmission output control means in a receiving station and a transmitting station.

FIG. 3 is a configuration diagram of another embodiment of transmission output control means.

FIG. 4 is a block diagram showing a configuration of each of a transmitting station and a receiving station in a conventional transmission output control method.

FIG. 5 is a configuration diagram of transmission output control means in a conventional receiving station and a transmitting station.

FIG. 6 is a configuration diagram of another conventional transmission output control means.

[Explanation of symbols]

 12,22 VTX 13,23 VRX 16,26 HTX 17,27 HRX 19 ATPCTX 29 ATPCRX 101 Detector 102 Comparator 103 Controller 201 Data comparator 202 Selector 203 Selection controller 204 Controller

Claims (3)

(57) [Claims] 1. Transmission output control for performing transmission with two different polarizations from a transmission station to a reception station, and controlling the transmission output level of the transmission station based on reception input level information detected at the reception station. In the method, the receiving station includes:
Means for transmitting a transmission output control signal generated based on one of the reception input level information of each of the two different polarizations to the transmitting station in each of the polarizations, station, and means for controlling the output of the transmitter of the respective polarized wave based on transmission output control signal the respectively received in each polarization Bei example, to the receiving station
Is the lower of the received input level information of the two different polarizations.
Means for detecting level-side received input level information;
Compare detected input level information with reference level
Means and increase the transmission power of the transmitting station based on the comparison result.
Means for generating a transmission power control signal for reducing
The transmitting station receives two different polarized waves, respectively.
Compare the contents of the transmission output control signal
Output transmission information and send output
And if the two do not match, send them a predetermined number of times
A transmission output control system comprising means for checking the contents of an output control signal . 2. Two different signals from a transmitting station to a receiving station.
Performs transmission with polarization, and
The transmission power level of the transmitting station based on the power level information.
In the transmission power control method for controlling, the receiving station includes:
Received input level information received at two different polarizations
Means for alternately selecting information and the selected reception input level
Means for transmitting information to the transmitting station in each polarization.
For example, the transmitting station may be configured to transmit each of the received polarizations.
The output of the transmitter for each polarization is controlled based on the output control signal.
Control means for controlling the transmission output. 3. The transmission output control method according to claim 1 , wherein the two different polarizations are a horizontal polarization and a vertical polarization.