KR100673164B1 - System for microwave repeater - Google Patents

Abstract

A microwave repeater system is provided to receive signals of a BTS by wireless, thereby improving limitation generated when using a cable as problems of a distance between the BTS and a repeater, installation costs, and operating costs when using an optical line. A microwave repeater system comprises the followings: a donor device(210) which receives a common frequency signal transmitted through a wireless network from a BTS(Base Transceiver Station)(200), converts the received signal into a microwave frequency signal, and transmits the converted signal by wireless in a downlink, and receives a microwave frequency signal, transmitted from a mobile station(230), converts the received signal into a common frequency signal, and then transmits the converted signal to the BTS(200) by wireless in an uplink; and a remote device(220).

Description

Microwave Repeater System {SYSTEM FOR MICROWAVE REPEATER}

The following drawings, which are attached in this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 to 3 are block diagrams schematically showing a microwave repeater system according to the prior art.

4 to 6 are block diagrams schematically showing a microwave repeater system according to an embodiment of the present invention.

7 to 9 are schematic block diagrams showing a microwave repeater system according to another embodiment of the present invention.

* Names of symbols for main parts of the drawings

200,300: base station 230,340: mobile station

210, 310: donor equipment 220: remote equipment

320: microwave conversion equipment 330: RF (RF) conversion equipment

The present invention relates to a microwave repeater system, and more particularly, to a microwave repeater system which minimizes attenuation of a signal transmitted / received through a wireless link between a base station and a donor equipment.

In general, a mobile communication service system is composed of a base station transceiver system, a base station controller, a mobile switching center, and a mobile station. Here, the base station and the mobile station communicate in a constant frequency band, and each base station has a constant call radius. Therefore, by arranging a plurality of base stations appropriately so that the call radius of each base station overlaps with each other, the area where the call is possible can be expanded.

However, even if the entire city is covered by the arrangement of such a plurality of base stations, a call shade area that is impossible to call occurs in island areas, large building underground spaces, and skyscrapers. In order to solve the problem of the occurrence of the call shadow area, the shadow area is eliminated by installing a repeater in the shadow area.

As an example of a repeater according to the prior art for eliminating the shaded area, there is a microwave repeater as shown in FIG.

The microwave repeater has a configuration including donor equipment 110 and remote equipment 120 for the relaying of signals between the base station 100 and the mobile station 150.

The donor equipment 110 receives a signal of a commercial frequency from the base station 100, converts the signal into a microwave signal, and transmits the converted microwave signal to the remote device 120 through a radio. That is, the donor equipment 110 receives a signal transmitted from the base station 100, converts the received signal into a 1718 GHz microwave frequency through a microwave module provided therein, and uses a final parabolic antenna for a far-field shadow area. Send to the remote device 120 installed in.

The remote device 120 converts the signal of the microwave frequency transmitted from the donor device 110 into a signal of commercial frequency again, and amplifies high power as needed to expand new coverage. In other words, the parabolic antenna receives the transmitted signal converted to the 1718 GHz microwave frequency, converts it to a commercial frequency through a series of processes such as filtering, low noise amplification, large power amplification, and frequency conversion, and converts the converted commercial frequency. The signal of is sent to the shaded area. The above process has been described focusing on the downlink operation, and the uplink operation proceeds in the reverse order similar to the downlink operation.

On the other hand, the donor equipment 110 is a method for receiving a signal from the base station 100, 1) directly connected to the coupler terminal of the base station 100 via a wire to receive a signal of the commercial frequency from the base station 100 2, a method of converting a commercial frequency into a low frequency through the RF conversion equipment 130, and receiving it by wire, and 3) an optical repeater donor as shown in FIG. There is a method of receiving an optical signal through the equipment 140 through the optical path.

However, in the case of the method 1), when the distance between the base station and the donor equipment 110 is far apart, the attenuation of the signal of the commercial frequency transmitted by wire is severe and the separation distance between the base station 100 and the donor equipment 110 is limited. . And, in the case of the method 2), there is a disadvantage that the base station must have a separate RF (RF) conversion equipment 130. In addition, in the case of the method 3), there is a problem that a large cost is required in the installation of the optical path and the operation of the equipment.

Accordingly, the present invention was created to solve the problems inherent in the prior art as described above, and an object of the present invention is to provide a microwave repeater system for optimizing a link between a base station and donor equipment through wireless. .

In order to achieve the above object, according to an aspect of the present invention, there is provided a microwave repeater system for signal relay of a base station and a mobile station in a mobile communication network: the system is a microwave for signal relay of a base station and a mobile station in a mobile communication network In the repeater system, the downlink, receiving a commercial frequency signal transmitted through the wireless network from the base station, converts it into a microwave frequency signal and transmits it wirelessly, and uplink the microwave transmitted from the mobile station side wirelessly Donor equipment for receiving a frequency signal, converting the signal into the commercial frequency signal, and transmitting the radio frequency signal to the base station; And receive the microwave frequency signal wirelessly transmitted from the donor equipment to downlink, convert the microwave frequency signal into the commercial frequency signal, and wirelessly transmit the converted commercial frequency signal to the mobile station within a service area, and uplink the mobile station. And a remote device that receives the commercial frequency transmitted from the radio and changes the microwave frequency signal to the donor device.

According to yet another aspect of the present invention, there is provided a microwave repeater system for signal relay between a base station and a mobile station in a mobile communication network, the system receiving, on downlink, a used frequency signal transmitted from the base station via a wireless network. And a donor device that converts the microwave frequency signal into a radio frequency signal and wirelessly transmits the radio frequency signal upon uplink. The donor device receives the microwave frequency signal transmitted from the mobile station side and converts the microwave frequency signal to the used frequency signal. ; In the downlink, the microwave frequency signal wirelessly transmitted from the donor equipment is received, converted into a predetermined low frequency signal, and outputted, and the predetermined low frequency signal transmitted from the mobile station side during the uplink is a microwave frequency signal. A microwave conversion device for converting the data into radio signals and wirelessly transmitting them to the donor device; And downlink, receives the predetermined low frequency signal from the remote device, converts the predetermined low frequency signal into the commercial frequency signal, amplifies the converted commercial frequency signal by a predetermined level, and transmits the radio frequency to the mobile station within a service area. And RF conversion equipment for receiving a commercial frequency signal wirelessly transmitted from the mobile station, converting the predetermined low frequency signal, and transferring the same to the remote device.

In the above configuration, the RF conversion equipment is disposed spaced apart from each other and the microwave conversion equipment is connected by wire.

In the above configuration, the predetermined low frequency signal has an arbitrary frequency level which minimizes the loss of the wired-phase signal connecting the microwave conversion equipment and the RF conversion equipment.

(Example)

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

4 to 6 show schematic block diagrams of a microwave repeater system according to an embodiment of the present invention.

As shown in FIG. 4, the system has a configuration including donor equipment 210 and remote equipment 220 for relaying commercial frequency signals transmitted / received between base station 200 and mobile station 230.

Referring to FIG. 5, the donor equipment 210 includes: a first duplexer 211 for filtering the commercial frequency wirelessly transmitted from the base station 200 in downlink; A first attenuator (212) for adjusting the magnitude of the filtered commercial frequency signal; A first low noise amplifier 213 for amplifying and outputting a regulated commercial frequency signal by a predetermined level; A second duplexer 214 for filtering and outputting a predetermined level amplified commercial frequency signal; And a first microwave module 215 for converting a commercial frequency signal passing through the second duplexer 214 into a microwave frequency and transmitting the radio frequency. In addition, the donor equipment 210 is transmitted from the mobile station 230 side during the uplink, and adjusts the magnitude of the commercial frequency signal transmitted via the microwave module 215 and the second duplexer 214. Attenuator 216; And a second low noise amplifier 217 that amplifies the adjusted commercial frequency signal by a predetermined level and transmits the predetermined frequency amplified signal to the first duplexer 211.

Referring to FIG. 6, the remote device 220 may include: a second microwave module 221 for converting the microwave frequency signal wirelessly transmitted from the donor device 210 to a commercial frequency during downlink; A third duplexer 222 for filtering the converted commercial frequency signal; A third attenuator 223 for adjusting the magnitude of the filtered commercial frequency signal; A third low noise amplifier 224 and a power amplifier 225 for amplifying and outputting the regulated commercial frequency signal by a predetermined level; And a fourth duplexer 226 that filters the amplified commercial frequency signal and transmits the same to the mobile station 230 in the service area through a wireless network. The remote device 220 may further include: a fourth low noise amplifier 227 which is transmitted from the mobile station 230 during the uplink and amplifies and outputs a commercial frequency signal filtered through the fourth duplexer 226 by a predetermined level; And a fourth attenuator 228 for adjusting the magnitude of the amplified commercial frequency signal and transmitting it to the third duplexer 222.

Hereinafter, the operation of the microwave repeater system according to an embodiment of the present invention having the above-described configuration will be described by dividing the downlink and the uplink.

First, in the case of the downlink, the donor equipment 210 receives a commercial frequency signal transmitted through the wireless network from the base station 200, converts it into a microwave frequency signal, and transmits the radio frequency signal. Thereafter, the remote device 220 receives the microwave frequency signal wirelessly transmitted from the donor device 210 and converts the microwave frequency signal into the commercial frequency signal, and converts the converted commercial frequency signal into a mobile station 230 in a service area. The radio station transmits the radio link to the radio link to complete the downlink relay service.

Next, in the uplink, the remote device 220 receives the commercial frequency wirelessly transmitted from the mobile station 230, converts the commercial frequency into a microwave frequency signal, and wirelessly transmits it to the donor equipment 210. Thereafter, the donor equipment 210 receives the microwave frequency signal transmitted from the remote equipment 220, converts it into a commercial frequency signal, and wirelessly transmits it to the base station 200, thereby completing the uplink relay service. .

7 to 9 show block diagrams schematically showing a microwave repeater system according to another embodiment of the present invention.

As shown in FIG. 7, the system includes donor equipment 310, microwave conversion equipment 320, and the microwave for relaying commercial frequency signals transmitted / received between the base station 300 and the mobile station 340. The conversion equipment 320 has a configuration including an RF conversion equipment 330 spaced apart from the wire. In this case, the RF conversion equipment 330 is to amplify the signal output from the microwave conversion equipment 320 again and wirelessly transmit at high power, and is applied when securing new coverage, that is, securing a large service area.

Referring to FIG. 8, the donor equipment 310 includes: a first duplexer 311 for filtering the commercial frequency wirelessly transmitted from the base station 300 in the downlink; A first attenuator (312) for adjusting the magnitude of the filtered commercial frequency signal; A first low noise amplifier 313 for amplifying and outputting a regulated commercial frequency signal by a predetermined level; A second duplexer 314 for filtering and outputting a predetermined level amplified commercial frequency signal; And a first microwave module 315 for converting a commercial frequency signal passing through the second duplexer 214 into a microwave frequency and wirelessly transmitting the microwave signal. In addition, the donor equipment 310 is transmitted from the mobile station 340 side in the uplink, the second attenuator for adjusting the magnitude of the commercial frequency signal transmitted through the microwave module 315 and the second duplexer 314 316; And a second low noise amplifier 317 for amplifying a predetermined level of the commercial frequency signal to be transmitted to the first duplexer 311.

Referring to FIG. 9, the microwave conversion device 320 may convert the microwave frequency signal wirelessly transmitted from the donor device 210 to a predetermined low frequency when downlinked. ); A third duplexer 322 for filtering the converted low frequency signal; A third attenuator 323 for adjusting the magnitude of the filtered low frequency signal; A third low noise amplifier 324 and a power amplifier 325 for amplifying and outputting a predetermined low-frequency frequency signal by a predetermined level; And a fourth duplexer 326 which filters the amplified commercial frequency signal and transmits the amplified commercial frequency signal to a mobile station 340 in a service area through a wireless network. In addition, the microwave conversion equipment 320 is a fourth low noise amplifier 327 which is transmitted from the mobile station 340 at the time of the uplink and amplifies and outputs the low frequency signal filtered by the fourth duplexer 326 by a predetermined level. ); And a fourth attenuator 328 for adjusting the magnitude of the amplified low frequency signal and transmitting the same to the third duplexer 322. Here, the predetermined low frequency signal has a frequency level which minimizes the loss of the signal on the wire that connects the remote device 320 and the frequency conversion device 330.

Referring to FIG. 10, the RF conversion equipment 330 may include: a fifth duplexer 331 for filtering the predetermined low frequency signal transmitted from the remote device 320 during downlinking; An RF (RF) converter 332 for converting the commercial frequency signal; A high output amplifier 333 for amplifying and outputting the converted commercial frequency signal with a high output; And a sixth duplexer 334 that filters the amplified commercial frequency signal and transmits the same to the mobile station 340 in the service area through a wireless network. On the other hand, the RF conversion equipment 330, the uplink, the predetermined frequency transmitted from the mobile station 340 through the sixth duplexer 334, the RF converter 332, and the fifth duplexer 331, the predetermined low. Convert to a frequency new hall, and transmits it to the remote device (320).

Hereinafter, the operation of the microwave repeater system according to another embodiment of the present invention having the above-described configuration will be described by dividing the downlink and the uplink.

First, in the case of the downlink, the donor equipment 310 receives a commercial frequency signal transmitted through the wireless network from the base station 300, converts it into a microwave frequency signal and transmits the radio frequency signal. Thereafter, the microwave conversion device 320 receives the microwave frequency signal transmitted from the donor device 310 and converts the microwave frequency signal into the predetermined low frequency signal, and transmits it to the RF conversion device 330 through a wire. do. Then, the RF conversion equipment 330 receives the predetermined low frequency signal from the remote device 320 and converts it into the commercial frequency signal, and amplifies the converted commercial frequency signal to a high output in the service area. Radio transmission to the mobile station 340 completes the downlink relay service, which extends the service area.

Next, in the uplink, the RF conversion equipment 330 receives a commercial frequency wirelessly transmitted from the mobile station 340, converts the predetermined frequency into the predetermined low frequency signal, and transmits the converted frequency to the microwave conversion equipment 320 through a wire. do. Thereafter, the microwave conversion equipment 320 receives the predetermined low frequency signal transmitted from the RF conversion equipment 330, converts the microwave signal into a microwave frequency signal, and wirelessly transmits the microwave frequency signal to the donor equipment 310. Thereafter, the donor equipment 310 receives the microwave frequency signal transmitted from the microwave conversion equipment 320, converts it into a commercial frequency signal, and wirelessly transmits it to the base station 300, thereby providing an uplink relay service. To complete.

As can be seen from the above, the microwave repeater system according to the present invention, by receiving the signal of the base station wirelessly, the constraints that occur when using the wire, that is, the distance between the supporting station and the relay period, the installation when using the optical path Problems such as costs and operating costs can be improved.

Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (4)

In the microwave repeater system for signal relay between a base station and a mobile station in a mobile communication network, Receives a commercial frequency signal transmitted through a wireless network from the base station during the downlink, converts it into a microwave frequency signal and transmits it wirelessly, and receives the microwave frequency signal wirelessly transmitted from the mobile station during the uplink. Donor equipment converting the signal into the commercial frequency signal and transmitting the radio frequency to the base station; And Receiving the microwave frequency signal wirelessly transmitted from the donor equipment during downlink, converting the microwave frequency signal into the commercial frequency signal, wirelessly transmitting the converted commercial frequency signal to the mobile station in the service area, and from the mobile station during the uplink And a remote device that receives the commercial frequency transmitted wirelessly, changes the microwave frequency signal into a microwave frequency signal, and wirelessly transmits the same to the donor equipment. In the microwave repeater system for signal relay between a base station and a mobile station in a mobile communication network, In the downlink, the base station receives a used frequency signal transmitted through a wireless network, converts it into a microwave frequency signal, and transmits the radio frequency signal. In the uplink, the microwave frequency signal transmitted wirelessly from the mobile station is received. Donor equipment converting the signal into the frequency signal and transmitting the radio frequency signal to the base station; In the downlink, the microwave frequency signal wirelessly transmitted from the donor equipment is received, converted into a predetermined low frequency signal, and outputted, and the predetermined low frequency signal transmitted from the mobile station side during the uplink is a microwave frequency signal. A microwave conversion device for converting the data into radio signals and wirelessly transmitting them to the donor device; And In the downlink, the predetermined low frequency signal is received from the remote device and converted into the commercial frequency signal, the converted commercial frequency signal is amplified by a predetermined level and wirelessly transmitted to the mobile station in the service area. And a radio frequency (RF) conversion device for receiving a commercial frequency signal wirelessly transmitted from the mobile station, converting the predetermined frequency signal into the predetermined low frequency signal, and transmitting the converted frequency signal to the remote device. According to claim 2, The RF conversion equipment, Microwave repeater system, characterized in that spaced apart from the microwave conversion equipment and connected by wire. The method of claim 2 or 3, wherein the predetermined low frequency signal, The microwave repeater system having an arbitrary frequency level which minimizes the loss of the wired-phase signal connecting the microwave conversion equipment and the RF conversion equipment.

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