KR20060015926A - Repeater output detecting system using optical coupler - Google Patents

Abstract

The present invention relates to a repeater output monitoring system using an optical coupler, and in particular, by connecting a coupler or a 2: 1 divider between an idle port and an optical coupler of an existing RF monitoring device, an obstacle of the optical coupler according to the monitoring member of the optical coupler. And it relates to a technology that can operate a stable system as a preliminary monitoring for power failure.

According to the present invention, there is provided a 1X / 2G base station; An optical coupler that receives each RF signal output from the 1X / 2G base station and combines the signals into one signal; A plurality of 10 dB couplers for separating the RF signal output from the optical coupler into two signals; An idle port of the RF monitoring apparatus including a plurality of ports for detecting an RF signal output from the optical coupler and monitoring whether the signal is defective; A donor of an optical repeater for converting an RF signal output from the 10 dB coupler into an optical signal; And a repeater for restoring the optical signal output from the donor of the optical repeater and relaying the optical signal through an optical cable.

Optocouplers, Repeaters, Couplers, Dividers, Output Monitoring

Description

Repeater output detecting system using optical coupler

1 is a block diagram of a repeater output monitoring system according to the prior art.

2 is a block diagram of a repeater output monitoring system using an optical coupler according to the present invention.

The present invention relates to a repeater output monitoring system using an optical coupler. More specifically, the present invention relates to a technology capable of improving a call quality by operating a stable system as a preliminary monitoring for an optical coupler failure and an output abnormality caused by a monitoring member of the optical coupler.

With the development of mobile communication, the number of users is increasing rapidly, and the base station has the greatest impact on the economics and service quality of the system due to its large number and high cost in order to meet the usage patterns and various demands.

In building a mobile communication network, it is preferable to service all service areas with general base stations, but in actual network configuration, base stations are arranged in consideration of economic efficiency, so underground spaces and apartment complexes, which are the blind spots of radio waves among mountain walls, remote islands, and urban areas In large buildings, hills, underground, etc., there are many unserviceable areas where radio waves cannot reach.

In particular, in terms of communication traffic, about 85% of the communication traffic is concentrated in 5% of the total area for providing a mobile communication service, and only about 15% of traffic is generated in the remaining 95% of the area. Therefore, in order to provide high quality telecommunication services at low cost for major areas such as highways, national roads and open areas where traffic is low but coverage is important, it is necessary to use repeaters instead of base stations, which are expensive to install and maintain. Efficient

1 is a block diagram of a repeater output monitoring system according to the prior art.

Looking at Figure 1, the 1X base station 10; 95AB base station 20; Optical coupler 30; Repeater 40; And an RF monitoring device 50.

The 1X / 95AB base station 10 or 20 performs CDMA channel and call processing, and is in charge of a wire matching function between a mobile station (MS) and a wireless matching function and a base station controller (BSC). In addition, it converts the high frequency (RF) signal of the channel (CH) to light and serves to send to the optical coupler (30).

At this time, the 1X / 95AB base station 10, 20 modulates a baseband signal and a radio frequency unit for frequency modulation and gain control for a radio interface, and links various information packets to a T1 / E1 link. It is composed of a digital unit (Digital Unit) for transmitting and receiving to the base station controller (BSC) through.                         

The optical coupler 30 receives two RF signals of 1X or 2G and combines them into one signal.

The repeater 40 converts an RF signal into an optical signal in a donor of the optical relay system, transmits the optical signal to a desired area by using an optical cable installed between a base station and a remote remote and then transmits the optical signal again. It restores to RF signal and provides mobile phone service.

The RF monitoring apparatus 50 converts the transmission (Tx) R / F and reception (Rx) R / F band signals of the monitoring point into 30 to 60 MHz band signals using a mixer. In addition, one of the signals and the Rx I / F band signals are selected under the control of the central management unit, sampling to an analog-to-digital (A / D) converter, and a fast Fourier transform (Fast). Fourier Transform (FFT) is used to convert the frequency spectrum to determine whether there is an abnormal signal. In addition, the CDMA RF monitoring device periodically checks the state of the monitoring target signal of the base station (BTS) and transmits the result to the operation center for monitoring.

The conventional repeater output monitoring device configured as described above has the following problems.

First, the difference in the values of 1X and 2G RX occurs when the RF monitor checks the level difference of the optical coupler.

Second, the optical coupler in the equipment operation is impossible to detect and monitor, so it is impossible to take precautions, and there is no way to detect the failure until the complaint or inspection in the event of a failure such as an amplifier failure.

Accordingly, the present invention is to solve the above problems, the present invention is to connect the coupler or 2: 1 divider between the idle port and the optical coupler of the existing RF monitoring device, respectively, the failure of the optical coupler according to the monitoring member of the optical coupler and Its purpose is to enable stable system operation by pre-monitoring for abnormal output.

As the technical idea for achieving the above object of the present invention

1X / 2G base station;

An optical coupler that receives each RF signal output from the 1X / 2G base station and combines the signals into one signal;

A plurality of 10 dB couplers for separating the RF signal output from the optical coupler into two signals;

An idle port of the RF monitoring apparatus including a plurality of ports for detecting an RF signal output from the optical coupler and monitoring whether the signal is defective;

A donor of an optical repeater for converting an RF signal output from the 10 dB coupler into an optical signal; And

It provides a repeater output monitoring system comprising a repeater for recovering the optical signal output from the donor of the optical repeater to relay through the optical cable.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

2 is a block diagram of a repeater output monitoring system using an optical coupler according to the present invention.

2, the IS-95C protocol-based 1X base station 100 and the IS-95A protocol-based 2G base station 200 are connected to the optical coupler 300, respectively, and the optical coupler 300 includes the first, A coupler / divider 400 with 2, 3 coupler / 2: 1 dividers 410, 420, 430 is connected.

In addition, the coupler / divider 400 is connected to an idle port of the RF monitoring apparatus 500, respectively, and is connected to an optical repeater donor 600 and a repeater 700.

Subsequently, referring to the operation of each component, the 1X / 2G base station 100 and 200 wirelessly connect to the mobile communication terminal through an antenna, and divide the service area into α, β, and γ of 120 ° region, respectively, and transmit and receive signals. Filter and amplify.

To this end, the required band is filtered from the signal received from the transceiver, the frequency is synthesized and transmitted to the antenna, the required band is filtered from the signal received from the antenna, the signal is amplified and distributed to the transceiver.

 In addition, as in the 1X base station 10 of FIG. 1, CDMA channel and call processing are performed, and a mobile matching terminal (MS) and a wireless matching function and a wire matching function between a base station controller (BSC) and the like are performed. In addition, it serves to convert the high frequency (RF) signal of the channel (CH) into light to be transmitted to the optical coupler (300).

The optical coupler 300 receives two RF signals of 1X or 2G and combines them into one signal.

The coupler / divider 400 serves to separate the RF signal output from the optical coupler 300 into two signals. In particular, the coupler has a gain of 10dB.

The RF monitoring device 500 is provided with a plurality of idle ports to detect the RF signal output from the optical coupler 300 to monitor whether the signal is defective, as shown in the RF monitoring device 50 of FIG. A mixer is used to frequency-transmit the transmit (Tx) R / F and receive (Rx) R / F band signals into 30-60 MHz band signals.

In addition, one of the signals and the Rx I / F band signals are selected under the control of the central management unit, sampling to an analog-to-digital (A / D) converter, and a fast Fourier transform (Fast). Fourier Transform (FFT) is used to convert the frequency spectrum to determine whether there is an abnormal signal.

The donor 600 of the optical repeater converts an RF signal output from the coupler or divider 400 having a gain of 10 dB into an optical signal.

The repeater 700 transmits the optical signal converted from the donor 600 of the optical repeater to the desired area by using the optical cable installed between the base station and the remote remote, and then transmits the optical signal to the RF signal again. It restores the service to the mobile phone service.

Therefore, according to the present invention, it is possible to operate a stable system through comparison and pre-monitoring of input levels of repeaters.

 According to the repeater output monitoring system using the optical coupler as described above, the optical coupler according to the monitoring member of the optical coupler by connecting a coupler or a 2: 1 divider between the idle port and the optical coupler of the existing RF monitoring device, respectively It is possible to operate a stable system and improve call quality by pre-monitoring failure and abnormal output. This maximizes the use of system monitoring and has the advantage of easy proactive checks on equipment. In addition, it is possible to maximize the operation of the equipment.

Claims (4)

1X / 2G base station; An optical coupler that receives each RF signal output from the 1X / 2G base station and combines the signals into one signal; A plurality of 10 dB couplers for separating the RF signal output from the optical coupler into two signals; An idle port of the RF monitoring apparatus including a plurality of ports for detecting an RF signal output from the optical coupler and monitoring whether the signal is defective; A donor of an optical repeater for converting an RF signal output from the 10 dB coupler into an optical signal; And And a repeater for recovering the optical signal output from the donor of the optical repeater and repeating the optical signal. The system of claim 1, wherein the IX base station is based on the IS-95A protocol, and the 2G base station is based on the IS-95C protocol. The repeater output monitoring system according to claim 1 or 2, wherein the 1X / 2G base station divides a service area into α, β, and γ in a 120 ° region, respectively, and filters and amplifies a transmitted / received signal. The repeater output monitoring system according to claim 1, wherein a 2: 1 divider is used in place of a 10dB coupler for separating the RF signal output from the optical coupler into two signals.

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