KR20010008847A - Transmission and reception monitoring apparatus of long distance antenna using WLL network base station tester - Google Patents

Abstract

PURPOSE: An apparatus for monitoring transmission and reception of a remote antenna using a base station testing unit of wireless local loop is provided to easily judge a transmission and reception state of the remote antenna using a circuit for monitoring a transceiver feeding state in an RF test part of a base station test unit. CONSTITUTION: An apparatus for monitoring transmission and reception of a remote antenna comprises a transceiver feeding state monitoring part of a base station testing unit which is connected to the first two-way divider and the second two-way divider. The first two-way divider(62) is comprised in a receiver of a base station, and halves a signal from an optical cable to send the halved signals to a 20dB coupler(60) and a monitoring side. The second two-way divider is comprised in a transmitter of the base station and halves a signal from a 20dB coupler of the transmitter to send the halved signals to the optical cable and the monitoring side.

Description

Transmission and reception monitoring apparatus of long distance antenna using WLL network base station tester

The present invention relates to a WLL system. In particular, a base station of a wireless subscriber network which enables a WLL base station to easily determine a transmission / reception status of a remote antenna by monitoring a transmission / reception status of a remote antenna other than the base station wireless area by using a base station test unit. It relates to a transmission and reception monitoring device of a far antenna using a test unit.

In general, the construction of a WLL base station system requires a base station test unit that can test and test an unmanned WLL base station system alone.

The WLL base station test section needs a base station test section that can receive the RF signal and check the power supply status of transmission and reception in real time.

In the related art, since the WLL base station cannot easily determine the transmission / reception status of the remote antenna, since a separate function or device for monitoring the state of the remote antenna other than the base station radio area is not provided.

The present invention has been made to solve such a conventional problem, an object of the present invention, it is possible to easily determine the transmission and reception status of the remote antenna using the transmission and reception state monitoring unit included in the RF test unit of the base station test unit. To provide a transmission and reception monitoring device of a far antenna using a base station test unit of a wireless subscriber network.

1 is an optical cable connection diagram between a WLL base station and a remote antenna

2 is a block diagram showing the system of the WLL base station system

3 is a block diagram of a base station test unit capable of monitoring a far antenna

4 is a block diagram of a WLL base station receiver for a far antenna;

5 is a block diagram of a WLL base station transmitter for a far antenna;

<Explanation of symbols for main parts of drawing>

50: base station testing section 51: RF testing section

54: Transmission and reception power supply status monitoring unit 60: 20 dB coupler

61,69: 2 way divider 62,67: 30/30 dB coupler

63, 66: band pass filter 65: divider

In order to achieve the above object, the present invention provides a transmission / reception state monitoring unit of a base station test unit, which is connected to a 30/30 dB coupler of a WLL base station receiver for a long-range antenna, divides a received signal from an optical cable, and sends one side to a 20 dB coupler. Two-way divider sends one side to the monitor, and a signal from a 20 dB coupler connected to the front end of the 30/30 dB coupler of the WLL base station transmitter for the far antenna. The divider is connected and configured.

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

1 shows an optical cable connection diagram between a WLL base station and a far antenna, and the far antennas 300 and 400 are connected from the WLL base station 200 through an optical cable 100.

2 shows a system schematic diagram of the WLL base station 200, which is connected to a base station controller with E1 and HDSL and outputs a call and control signal, and is connected with the interface unit 10 and a timing signal. A digital processing unit for outputting a synchronization unit 20 and receiving a timing signal from the synchronization unit 20 and reporting a state of a base station to a higher system by a control signal of the interface unit 10. 30, an RF processor 40 operating by timing signals of the synchronization unit 20 and exchanging interface signals with the digital processor 30 and controlling RF, and the RF processor 40 and the RF signal. It consists of a base station test unit 50 for transmitting and receiving and transmitting and receiving a control signal with the interface unit 10.

3 shows a detailed configuration of the base station test unit 50 of FIG. 2, and shows a block diagram of receiving and transmitting a signal transmitted and received from a remote antenna other than the base station cell to the base station test unit for monitoring.

As shown here, the RF signal is received from the RF control unit 40 and performs the RF signal processing function of the base station test unit 50, the presence or absence of the transmission and reception antenna, the measurement of the base station output, the RF signal path between the WLL terminal and the base station RF test unit 51 and the RF test unit 51 for receiving a command from the digital control unit to turn on / off the signal path for each sector or attenuation that can occur in a wireless environment in the path consisting of a wired; And a digital control unit 52 that tests the power control induction function and the function of the TPTL as a main board, receives information through communication with the WLL terminal, and analyzes it to report the function of the current base station to a higher system, and the RF test. A WLL terminal 53 connected between the unit 51 and the digital control unit 52 is provided.

In addition, the RF test unit 51 monitors and evaluates the quality of the transmission / reception power supply state in the operating state, and inspects and notifies in real time whether there is an abnormal state of the actual operating state to enable rapid processing for maintenance, and a long-range antenna A transmission / reception feeding state monitoring unit 54 having a portion, a transmission power detecting unit 55 for accurately detecting a feeding power in a changing state of the CDMA method, and performing accurate control, and a virtual line for a realistic test A test line providing unit 56 for enabling a test between the terminal unit and the central station, a status display unit 57 for displaying the contents of each information for confirming the above items, and a command from the digital control unit 52. It consists of an information transmitting and receiving unit 58 for transmitting the request information.

4 is a block diagram of a WLL base station receiver for a long-range antenna according to the present invention, and a 20dB coupler 60 for coupling a signal received by an antenna and a signal received from an optical cable are bisected to the 20dB coupler 60 and monitoring. A constant two-way divider 61, a 30/30 dB coupler 62 coupling the signal of the 20 dB coupler 60 and a two-way divider signal, and a constant signal passing through the 30/30 dB coupler 62 A band pass filter 63 for passing only a band, an LNA 64, and a divider 65 for dividing the signal of the LNA 64 into a DCC.

5 is a block diagram of a WLL base station transmitter for a far-field antenna according to the present invention, in which a band pass filter 66 for passing only a constant band signal of a signal from a UCC and 30 for coupling an output signal of the band pass filter 66 are shown. / 30dB coupler 67, a 20dB coupler 68 which couples the signal of the 30 / 30dB coupler 67 again, and a two-way divider for dividing the signal of the 20dB coupler 68 to the optical cable and monitoring ( 69).

Referring to the operation of the present invention configured as described above is as follows.

The present invention connects the two-way dividers 61 and 69 to the receiver and the transmitter of the transmission and reception state monitoring unit 54 of the base station test unit 50. First, one side of the two-way divider 61 is connected to a remote antenna. Connect the receiver side, and the other side connects the receiver side of the base station.

One side of the two-way divider 69 connects the transmitter side of the remote antenna and the other side connects the transmitter side of the base station.

20 dB couplers 60 and 68 are respectively inserted into the transceiver input / output terminals of the base station 200, and then 2-way dividers 61 and 69 are connected thereto.

Since the wireless environment under the remote antenna is the same as the wireless environment under the base station, it is possible to determine whether there is an abnormality when the numerical value is different from the wireless environment under the normal base station as a monitored value. To judge.

That is, the signal received through the optical cable from the remote antenna 300, 400 as shown in FIG. 1 is received by the receiver of the base station test unit 50 of the WLL base station 200 as shown in FIG. The signal is divided by the two-way divider 61, and one side passes through the 20dB coupler 60 to the DCC via the 30 / 30dB coupler 62 → bandpass filter 63 → LNA 64 → divider 65. The other side is output to the monitor to display the reception state of the far antenna.

Meanwhile, the transmission state transmitted from the WLL base station 200 as shown in FIG. 1 to the remote antennas 300 and 400 through the optical cable 100 may be determined by the path as shown in FIG. 5.

That is, the signal from the UCC is passed only a predetermined band through the band pass filter 66, and then output 30dB to the RTU through the 30 / 30dB coupler 67, and then transmitted to the antenna through the 20dB coupler 68 and The two-way divider 69 is divided into two, and one side is transmitted to the remote antennas 300 and 400 through the optical cable, and the other side is sent to the monitor to display the transmission status.

As described above, the present invention allows the WLL base station to easily transmit / receive a remote antenna by displaying a transmission / reception status of the remote antenna through a monitor by using a base station test unit and having a remote antenna unit in a transmission / reception state monitoring unit in the base station test unit. There is an effect that can be judged.

Claims (1)

In the WLL system including a transmission and reception power state monitoring unit in the RF test unit of the base station test unit, A transmission and reception power state monitoring unit of the base station test unit, It is connected to the front end of 30 / 30dB coupler of WLL base station receiver for long range antenna and divides the received signal from optical cable, and sends one side to 20dB coupler and the other side sends to monitor, A wireless subscription comprising a two-way divider that divides a signal from a 20 dB coupler connected to the front end of a 30/30 dB coupler of a WLL base station transmitter for a long range antenna and sends one side to the far antenna through an optical cable and one side to a monitor. Transmission and reception monitoring device of remote antenna using base station test part of own network.