KR20090020717A

KR20090020717A - Relay system and the method which have a wired line agc and radio wireless line agc function

Info

Publication number: KR20090020717A
Application number: KR1020070085214A
Authority: KR
Inventors: 나정일
Original assignee: (주)하이게인텔레콤
Priority date: 2007-08-24
Filing date: 2007-08-24
Publication date: 2009-02-27

Abstract

A relay system having the wired line AGC and wireless line AGC functions and a method thereof are provided to compensate for the line loss corresponding to the change in an environment by monitoring the path loss of a donor microwave unit and remote microwave unit. A donor apparatus(11) comprises the followings: a donor modem which generates a certain forward pilot output level; a donor RF module in which a modem for controlling the attenuation value of an internal attenuator is built; a relay remote RF module which receives/measures the forward pilot signal of the donor modem through a donor microwave unit and remote microwave unit, transmits the measured result to an RF monitoring unit, and then controls the attenuation value according to a forward gain control instruction; and a relay controller which compensates for the wired line loss and wireless line loss.

Description

Relay system having a wired line AC and wireless line ACC function and method thereof {Relay system and the method which have a wired line AGC and radio wireless line AGC function}

The present invention relates to the automatic compensation of repeater line loss, in particular, the donor unit (DRFU) and the microwave unit (DMWU) of the repeater in the mobile communication network; the microwave unit (DMWU) and microwave unit (RMWU); RMWU) and remote loss control system and method of the remote unit (RRFU).

With the rapid development of mobile communication, various repeaters have been developed and produced for better quality service and smooth communication service.

In general, in a mobile communication network, a repeater is usually operated as a means for efficiently operating base station resources or providing a normal communication service in a communication dead zone or to economically expand a service area of a base station. A microwave repeater comprising a donor module for transmitting and receiving signal links with a base station and a remote module for transmitting and receiving signal links with a mobile station; Since the donor module and the remote module are wirelessly connected through the microwave unit, the repeater generally has more economical operational advantages than the conventional optical communication repeater and the spatial propagation interference of the RF repeater that services the terrestrial area. It is a device that solved the problem.

Conventional microwave donor module (DRFU) and microwave unit (DMWU); repeater remote module (RRFU) and the microwave input level is different depending on the loss of the line (LOSS) of the wire line length of the microwave unit (RMWU), or repeater itself Part that needs to be visited and changed by the repeater if it is decreased or increased from the initial value due to poor or other causes; affects the path loss of the wireless line section of the microwave unit (DMWU) and the microwave unit (RMWU). The monitoring function of whether the service is degraded due to an abnormal situation that can give an error can not be known, and there is an inconvenience of having to change the set value by visiting the repeater because there is a part to cope manually with the change of the gain of the link section according to the environmental change. There is a problem that a considerable cost occurs in the checking process.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is a repeater donor module (DRFU) and a microwave unit (DMWU); a wired line of a remote module (RRFU) and a microwave unit (RMWU) in a mobile communication network. Automatically compensates cable loss for the system and monitors the path loss of the microwave unit (DMWU) and the microwave unit (RMWU) to monitor service loss due to abnormal conditions that may affect the path loss after equipment installation. By actively coping with environmental changes to compensate for gain, GAIN is constant between microwave units according to path loss.

Still another object of the present invention is to automatically reduce the loss of line and path loss without the operator going directly to the field, thereby reducing the manpower and cost for repeater inspection and management. In addition, it is to keep the call quality of the repeater continuously.

Stable forward pilot signal generation of donor modem module of mobile communication repeater; A forward pilot input monitoring function of the microwave unit (DMWU); A forward pilot output monitoring function generated at the donor modem module of the remote modem module; Stable reverse pilot signal generation of the remote modem module; A reverse pilot input monitoring function of the microwave unit (RMWU); Reverse pilot output monitoring function generated by the remote modem module of the donor modem module; Allows the use of attenuators to maintain constant compensation for line loss and pass loss losses.

As described above, the present invention provides a repeater donor device (DRFU) and a microwave unit (DMWU) in a mobile communication network; Automatic compensation of cable loss of wired lines of repeater remote unit (RRFU) and microwave unit (RMWU), and monitoring of path loss of microwave unit (DMWU) and microwave unit (RMWU) By implementing a system and method that can automatically compensate for line losses, operators can be handled automatically without going directly to the field, thereby reducing labor and cost savings for inspection and management. The call quality can be maintained continuously.

The first invention of the present invention for solving the object as described above relates to the compensation of the wire line loss between the donor device (DRFU) and the microwave unit (DMWU) as shown in Figure 2 when the equipment is not powered, repeater donor The device DRFU radiates a pilot double oil (CW) signal to the microwave unit DMWU. In the microwave unit DMWU, there is an input detector at the input terminal of the IF to detect the signal level, and the value is reported to the repeater donor device (DRFU) through a modem. At this time, the input detector (Detector) of the microwave unit (DMWU) uses a log amp detector, and since the divide voltage (V / dB) is changed linearly, the insertion loss is accurately known at an early stage. The specific value is stored by using the cable, and the insertion loss is calculated based on the formula determined according to the deviation of the detected voltage value when using the arbitrary cable. Based on the loss, the controller compensates for the loss by controlling the cable compensation attenuator of the donor RF module with built-in attenuator.

The second design is a remote unit (RRFU) and a microwave unit as shown in FIG.

The wired line loss compensation between the (RMWU) and when power is supplied to the equipment, the repeater donor device (RRFU) radiates a pilot double oil (CW) signal to the microwave unit (RMWU). In the microwave unit (RMWU), a detector is installed at the IF input terminal.

The signal level is detected and the value is reported to the repeater remote (RRFU) via the modem. At this time, the input detector of the microwave unit (RMWU) uses a log amp detector, so that the divide voltage (V / dB) is changed linearly, so the initial insertion loss is accurately known. The specific value is stored by using the cable, and the insertion loss is calculated based on the formula determined according to the deviation of the detected voltage value when using the arbitrary cable. Based on the loss, the controller compensates for the loss by controlling the cable compensation attenuator of the remote RF module with built-in attenuator.

As a specific example, emit a -35dBm / 2ton cedar oil (CW) signal

When using a cable with an insertion loss of 1 dB, the microwave unit (DMWU / RMWU) receives an input of -36 dB (dBm), and the detected voltage value is the insertion loss.

The value is stored at 1 division (dB). However, the detector has a characteristic of 100 millivolts per dB (100 mV / dB), so if you use a cable with an insertion loss of 4 dB (dB), the microgroove unit (DMWU / RMWU) will have -36 dBm (dBm). ), And the voltage value is detected to be 300 millivolts (mV) lower than the stored value. From this, we can see that the cable loss is 3 div (dB) more 4 div (dB).

The third design relates to the wireless line compensation of the donor microwave unit (DMWU) and the remote microwave unit (RMWU) as shown in FIG. 4, and generates a pilot signal in the donor modem device and the remote modem device, and generates other signals and mux ( MUX) to transmit a signal to a remote microwave unit (RMWU) or a donor microwave unit (DMWU) via a donor microwave unit (DMWU) or a remote microwave unit (RMWU), and then the remote microwave unit (RMWU) or Receive a signal from the donor microwave unit (DMWU),

After down-converting the frequency from the modem device to the IF band, the pilot signal required for the AGC detector is separated by a SAW filter.The power of the pilot signal output from the donor modem device. The link age (AGC) is performed based on the level and the power level of the pilot signal detected by the remote modem device. That is, the line automatic gain adjustment is performed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is to implement a repeater line automatic compensation system that can automatically adjust the cable line loss and wireless line loss of the repeater remotely in the mobile communication network without the operator's intervention, these systems are divided into the forward and reverse cases .

First, the overall configuration of the repeater and the automatic line compensation system according to the present invention, as shown in Figure 1, the donor device 11, the microwave unit 12 and the wireless section 15-1 which is a wired section 15 ), The microwave unit 12 and the microwave unit 13, and the microwave unit 13 and the remote device 14, which is the wired section 15, have a configuration in which the RF monitoring device 16 is interlocked.

2 also shows the configuration of the wired line 37. The donor device 31 is a repeater donor device 31 implemented in the base station and the microwave unit 38 for the purpose of transmitting and receiving signal links with the base station. The microwave unit 38 generates a forward pilot signal through the pilot signal generator 35 according to the forward pilot signal generation command of the repeater control device 36 and measures and monitors the pilot signal. When the output is detected through the forward pilot input detector 39 of, and the forward pilot signal output value detected by the control unit 40 is transmitted to the repeater control device 36, the repeater control device 36 compares with the preset output value. It has a configuration including an attenuator 33 for controlling the attenuation value of the donor RF module 32 in accordance with the automatic line loss compensation command according to the line loss.

The repeater control device 36 is connected to the donor RF module 32 and the donor modem device 35, and the control unit of the microwave unit 38 when the forward automatic line loss compensation cycle is reached according to an operator or a remote control command. 40) to detect, measure and forward the forward pilot signal from the repeater. As a result, a forward pilot signal output difference value is calculated by comparing the pilot signal output value with the preset forward pilot signal reference value, and a donor is executed for the automatic forward gain line automatic compensation command carrying the attenuation value corresponding to the calculated forward signal output difference value. Transmission to the RF module 32 serves to adjust the gain of the repeater by adjusting the attenuation value of the attenuator 33 in the donor RF module 32.

In addition, the repeater controller 36 manages the forward pilot signal reference value and the attenuation value corresponding to the signal output difference value, and stores the details together with the execution time information after performing the forward gain adjustment function of the repeater. Management and reporting to the operator.

In addition, the remote device 42 of FIG. 2 is a repeater remote device 42 of a wired line 37 implemented in the mobile station and the microwave unit 48 for the purpose of transmitting and receiving signal links with the mobile station. In response to the reverse pilot signal generation command of 47, the remote modem device 45 generates the reverse pilot signal through the pilot signal generator 46, and the reverse pilot input detector of the microwave unit 48 that measures and monitors the pilot signal.

When the output is detected through 49 and the reverse pilot signal output value detected through the controller 41 is transmitted to the repeater controller 47, the repeater controller 47 outputs the preset output.

Remote RF module according to automatic line loss compensation command according to line loss compared to value

It has a configuration including an attenuator 44 for controlling the attenuation value of (43).

The repeater control device 47 is connected to the remote RF module 44 and the remote modem device 45, and the control unit of the microwave unit 48 when the reverse automatic line loss compensation cycle is reached according to the operator or the remote control command. 41) to detect, measure and forward the reverse pilot signal from the repeater. As a result, the reverse pilot signal output difference value is calculated by comparing the pilot signal output value and the preset reverse pilot signal reference value, and the remote gain line automatic compensation command containing the attenuation value corresponding to the calculated reverse signal output difference value is remoted. Transmission to the RF module 43 serves to adjust the gain of the repeater by adjusting the attenuation value of the attenuator 44 in the remote RF module 43.

In addition, the repeater controller 47 manages the reverse pilot signal reference value and the attenuation value corresponding to the signal output difference value and stores the details together with the execution time information after performing the reverse gain adjustment function of the repeater. Management and reporting to the operator.

In the system with such a configuration, the repeater

Referring to FIG. 3, the following description will be made. (Details are described with the forward path only by the donor device 31; as described above, the reverse path also operates in the same manner as the forward path, but only the corresponding components. wrong.)

First, the donor device 31 of the repeater, the repeater control device 36, and the microwave unit.

With (38) connected, the operator enters a forward automatic line compensation command or

When the set forward gain adjustment period is reached, the repeater control device 36 returns to the forward ruler.

Pilot signal generator of donor modem device 34 connected with itself for the compensation of copper line

Send 35 a command to the microwave unit 38 to generate a pilot signal

(S71)

The donor modem device 34 generates a forward pilot generation name from the repeater control device 36.

When the command is received, a pilot signal is generated according to the command (S72).

At this time, the micro-input received from the pilot signal generator 35 of the repeater modem device 34

The Eve unit 38 measures the received pilot signal and transfers data to the repeater control device 36 through communication (S73).

In this way, when the repeater control device 36 receives data from the microwave unit 38, the repeater controller 36 compares the forward pilot output value of the repeater with a preset output value managed in the database to check whether they are the same.

At this time, when the forward pilot output value transmitted from the microwave unit 38 is the same as the preset forward output value, the automatic forward loss compensation process is not performed. It stores and stores the information that the current forward gain adjustment is not performed, the current forward pilot output value of the repeater, the number of forward gain adjustments, information, etc. together with the time information (S75).

However, when the reference output values are not the same, the repeater control device 36 may transmit the forward pilot output value of the repeater transmitted through the control unit 40 to the forward pilot input detector 39 of the microwave unit 38 and the preset forward signal reference. The output values are compared to calculate the output difference value, that is, the forward pilot output value (S76).

After the repeater control device 36 calculates the pilot signal output difference value, the repeater control device 36 searches the database using the pilot output difference value obtained as a result of the calculation, and then the donor RF module.

Reference is made to the attenuation value required to control the attenuator 33 of (32), i.e., the pilot signal output level.

After extracting the attenuation value required for automatic adjustment to the output level, the automatic automatic line compensation is performed using the extracted attenuation value (S77).

Finally, after repeater control device 36 performs repeater gain, that is, automatic line compensation,

Repeater performance is stored. This is attenuator 33 in accordance with the gain adjustment command for the repeater.

Attenuation value, pilot signal output value, gain adjustment number information

Manage (S78)

Next, referring to the wireless line compensation system, as shown in Fig. 4, the donor device

The remote device 61 which is a wireline 58 again via the microwave unit 60 which is a section of the wireless line 58-1 through the microwave unit 59 connected to the wireline 58 with the wire 51.

Leads to. Detailed description is as follows.

The donor device 51 transmits and receives a signal link with the base station and the donor microwave unit 59.

The donor modem device 54 passes through the pilot signal generator 55 according to the forward pilot signal generation command by the instrument control device 57 while adjusting the reverse gain for the radio line loss with the supporting donor relay device 51. The remote modem device 67 of the remote device 61 generates a forward pilot signal and measures and monitors a pilot signal through the microwave unit 59 and the microwave unit 60 which are sections of the wireless line 58-1. The forward pilot receiver 66 _ separates the pilot signal necessary for the AGC detector after frequency downconversion to the IF band by the SAW filter _ 66-1 of the pilot detector 66-. 1) the output is detected through the remote repeater control device 64, and the forward pilot signal output value detected by the remote repeater control device 64 is compared with the preset output value by the automatic line loss according to the line loss In accordance with the compensation command has a configuration comprising a damper (63) for controlling the attenuation of a RF remote module 63.

The remote device 61 transmits and receives a signal link with the mobile station and the donor microwave unit 60.

The remote modem device 67 reverses the pilot signal generator 65 through the pilot signal generator 65 according to the reverse pilot signal generation command by the repeater control device 64 that adjusts the forward gain for the wireless line loss to the supporting remote relay device 61. The reverse direction of the donor modem device 54 in the remote device 51 which generates a pilot signal and measures and monitors the pilot signal through the microwave unit 60 and the microwave unit 59 which are sections of the wireless line 58-1. The pilot receiver 56 _ separates the pilot signal necessary for the AGC detector after down-converting the frequency to the IF band by the SAW filter _ 56-1 of the pilot detector 56-1. The output of the reverse pilot signal detected by the donor repeater control device 57 and the donor repeater control device 57 are compared to a preset output value, and the automatic line loss according to the line loss is detected. It has a configuration including an attenuator 53 for controlling the attenuation value of the donor RF module 52 in accordance with the compensation command.

Each control device 57, 64 is connected to each RF module 52, 62 and each modem device 54, 67, and the donor modem device 54 and the remote modem device 62 communicate with each other in the forward direction of the repeater. The pilot signal and the reverse pilot signal are detected and measured. As a result, the pilot signal output difference value is calculated by comparing the pilot signal output value and the predetermined forward pilot signal reference value, and the attenuation value corresponding to the calculated signal output difference value. Donor RF module by sending this carried out gain line automatic compensation command to donor RF module 52 and remote RF module 62

The attenuation values of the attenuators 53 and 63 in the 52 and the remote RF module 62 are respectively adjusted to adjust the repeater gain.

In addition, the repeater controller 57, 64 manages the pilot signal reference value and the attenuation value corresponding to the signal output difference value, and stores the details together with the execution time information after performing the gain adjustment function of the repeater. Management and reporting to the operator.

In the system with such a configuration, the repeater

Referring to Figure 5 as follows.

When the operator inputs an automatic line compensation command or reaches a preset gain adjustment period while the donor device 35 and the repeater control device 57, the remote device 61 and the repeater control device are connected, the repeater control device ( In step 57, the donor modem device 54 connected to itself for automatic line compensation transmits a command to the pilot signal generator 55 to generate a pilot signal to the remote modem device 67 (S91-1).

At the same time, the remote modem device 67 also provides a pilot signal generator 65 to the donor modem device.

In operation S91, a command to generate a pilot signal is transmitted.

Then, the donor modem device 54 generates a forward pilot generation name from the repeater control device 57.

When the command is received, a pilot signal is generated according to the command. (S92-1)

At the same time, the remote modem device 67 is a reverse pilot from the repeater control device 64.

When the generation command is input, the pilot signal is generated according to the command (S92).

At this time, the remote RF module 62 received from the pilot signal generator 55 of the repeater donor modem device 54 measures the pilot signal and transmits the measured pilot signal to the data repeater control device 64 through communication between the donor and the remote. (S93-1)

Simultaneously proceeds from the pilot signal generator 65 of the remote modem device 67

Input donor RF module 52 measures the pilot signal to communicate between the remote and the donor

The data is transmitted to the repeater control device 57 through the controller (S93).

In this way, when the repeater controller 64 or 57 receives data from the remote device 61 and the donor device 51, the repeater forward output value and the reverse output value of the repeater are compared with the preset output values managed in the database. Check if they are identical to each other. (S94-1, S94))

At this time, if the pilot output values transmitted from the donor modem device 56 and the remote modem device 67 are the same as the preset pilot output value, the automatic loss compensation process is not performed, and the existing gain adjustment details are stored for the automatic loss compensation. In addition, the current gain adjustment, the current pilot output value of the repeater, the number of gain adjustments, and information are managed and stored together with the time information. (S95-1, S95)

)

However, when the reference output values are not the same, the repeater control apparatuses 57 and 64 may transmit the data received through the pilot receiving units 66 and 56 of the modem devices 62 and 54 to the pilot output values of the repeaters and the preset reference output values. The output difference values, that is, the forward and reverse pilot output values, are calculated. (S96-1, S96)

After the repeater control device 64 calculates the pilot signal output difference value, it is necessary to search the database using the pilot output difference value obtained as a result of the calculation to control the attenuator 63 of the remote RF module 62. After the attenuation value, that is, the attenuation value necessary to automatically adjust the pilot signal output level to the reference output level is extracted, the automatic automatic line compensation is performed using the extracted attenuation value (S97-1).

At the same time, the repeater control device 57 is required to control the attenuator 53 of the donor RF module 52 by searching the database using the pilot output difference value obtained as a result of calculating the pilot signal output difference value. After the attenuation value, that is, the attenuation value necessary for automatically adjusting the pilot signal output level to the reference output level is extracted, the reverse automatic line compensation is performed using the extracted attenuation value (S97).

Finally, the repeater controller 64, 57 stores the repeater gain, ie, the repeater performance after the automatic line compensation. This is the attenuation values of the attenuators 63, 53, and pilot according to the gain adjustment command for the repeater. The signal output value, gain adjustment number information, etc. are stored and managed together with the time information (S98-1, S98).

1 is a configuration showing a relay system having a line compensation of the repeater according to the invention

Block diagram

Figure 2 is a block diagram of a wired line AGC system of a repeater according to the invention

3 is a flow chart of a wired line AGC operation of the repeater according to the invention

4 is a block diagram of a wireless line AGC system of a repeater in accordance with the invention.

5 is a flowchart illustrating a wireless line AGC operation of the repeater according to the present invention.

* Glossary of key parts

DRFU: DONOR RF UNIT Donor RF Unit

RRFU: REMOTE RF UNIT Remote RF Unit

DMWU: DONOR MICROWAVE UNIT Donor Microwave Unit

RMWU: REMOTE MICROWAVE UNIT Remote Microwave Unit

AGC: AUTO GAIN CONTROL Auto gain control

MODEM: MODULATOR-DEMODULATOR Computer (Modem)

Repeater: Device that transmits RF signal of base station to remote area by various methods and replays it as RF signal.

Repeater Control Unit: MCU Main Control Unit

Claims

A module for supporting a transmission / reception signal link from a repeater (DRFU) to a microwave unit (DMWU), the module comprising: a donor modem device that is turned on / off by external control and generates a constant forward pilot output level during on-drive; A donor RF module incorporating a modem for controlling the attenuation value of the internal attenuator in accordance with a gain adjustment command;

Measuring the forward pilot signal of the donor modem device through the microwave unit (DMWU) and the microwave unit (RMWU) to transmit the signal to the RF monitoring device and controls the attenuation value of the attenuator according to the forward gain adjustment command Repeater Remote RF Module

and;

The donor modem device transmits a forward pilot signal, compares the signal output value of the repeater with the resultant forward pilot output value, and calculates a forward pilot signal output value, and the attenuator control attenuation value corresponding to the calculated output difference value. A repeater control device for transmitting the carried forward gain adjustment command to the donor RF module and the remote RF module to adjust the attenuation value of the attenuator in each RF module to compensate for gains for wireline loss and wireless line loss. Repeater automatic track compensation system, characterized in that.

The method of claim 1,

The repeater control device is a database for measuring the forward and reverse pilot signal output value and the difference between the forward and reverse pilot signal output value, and database and manage the attenuator attenuation values of the donor RF module and the remote RF module corresponding thereto. Repeater automatic line, characterized in that reported to the operator with the execution time information

Compensation system.

A module for supporting a transmission / reception signal link from a repeater (RRFU) to a microwave unit (RMWU), the module comprising: a remote modem device that is driven on / off by external control and generates a constant reverse pilot output level during on-drive; A remote RF module incorporating a modem for controlling the attenuation value of the internal attenuator in accordance with a gain adjustment command;

Repeater for measuring the reverse pilot signal of the remote modem device through the microwave unit (RMWU) and the microwave unit (DMWU) to measure the signal transmitted to the RF monitoring device and control the attenuation value of the attenuator according to the reverse gain adjustment command A donor RF module;

The reverse modem signal is transmitted from the remote modem device, the reverse pilot signal output value is calculated by comparing the resultant repeater signal output value with the preset reverse pilot output value, and the attenuator control attenuation value corresponding to the calculated output difference value. A repeater control device that transmits the received reverse gain adjustment command to the donor RF module and the remote RF module to adjust the attenuation value of the attenuator in each RF module to compensate for gains for wireline loss and wireless line loss. Repeater automatic track compensation system, characterized in that.

The method of claim 3, wherein

Transmitting a forward signal detection command to a repeater donor RF module when a gain adjustment command for forward and reverse line compensation is input to the repeater control device or when a preset forward and reverse gain adjustment period is reached; and a repeater remote RF module Transmitting a reverse signal detection command;

Controlling the signal output detectors of the donor RF module and the remote RF module to detect repeater forward and reverse output values, and transmitting forward and reverse signal output values of the repeater performed as a result to the repeater control device;

The output difference value is calculated by comparing the forward and reverse pilot signal output values of the transmitted repeater with the preset forward and reverse pilot signal output values, and then, using the calculated output difference value, the attenuation value required for attenuator control is extracted from the database. Process;

Transmitting a forward and reverse gain adjustment command carrying the extracted attenuation value to the donor RF module and the remote RF module, and automatically adjusting the attenuation value of the attenuator of the RF module according to the gain adjustment command. Repeater automatic track compensation system.