KR20100029295A - A system for using common feeder cable in in-building - Google Patents

Abstract

PURPOSE: In an in-building, a feeder sharing system offers a PCS(Personal Communication Services), and a WCDMA(Wideband Code Division Multiple Access) and WiBro(Wireless Broadband Internet) service to building which is through the feeder owned in common with the feeder shared, and distributor and antenna. In that way the convenience of maintenance and repair is offered. CONSTITUTION: A plurality of signal level adjustment portions(120) downs an output signal of the relay(110) to a signal of the predetermined level. A feeder share unit(130) comprises a plurality of filters. Filters filter each of a plurality of signals of the signal level adjustment portion to the set band. The feeder commonality outputs the output signals of filters through the feeder share end. A distributor(140) distributes the output signal of the feeder commonality to a plurality of antennae.

Description

Feeder line sharing system in building {A SYSTEM FOR USING COMMON FEEDER CABLE IN IN-BUILDING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeder line sharing system, and more particularly to facilities such as feeders, distributors, and antennas in building systems that are personal communication services (PCS), wideband code division multiple access (WCDMA), and wireless broadband internet (WiBro). A feeder line sharing system in an in-building that can be shared.

The general in-building system provides mobile communication service together with the in-building dedicated base station in the underground parking lot of large buildings such as department stores and hospitals and the quality deterioration section of the ground.

The department store should use tens or hundreds of antennas instead of one antenna due to various propagation environments. For this, several [Km] feed lines are required. Each time PCS / WCDMA / WiBro service is provided, separate equipment and facilities can be used, which may make it difficult to distinguish not only the equipment but also the facilities during maintenance.In addition, the initial facility costs may be in the thousands to hundreds of millions. Therefore, if a separate facility for telecommunications is promoted, the initial investment cost of a telecom operator may be excessive, which may cause a rise in telecommunication costs.

Therefore, there is a need for a system that can provide services such as PCS / WCDMA / WiBro in the in-building system using common equipment and facilities rather than separate equipment and facilities.

An object according to an embodiment of the present invention was created to solve the above problems, by providing PCS, WCDMA and WiBro services in the building through the feeder line, the divider and the antenna shared by the feeder line, convenient maintenance It is to provide a feeder line sharing system in an in-building that can provide castles and reduce initial facility costs.

Another object of the present invention is to solve a passive inter-modulation distortion (PIMD) problem between WiBro signals and WCDMA signals, thereby preventing degradation of backward capacity caused by noise level rise in the WCDMA reception band. It is to provide a feeder line sharing system in an in-building.

To achieve the above object, a feeder line sharing system according to an aspect of the present invention comprises a plurality of signal level adjusting unit for receiving a signal output from the repeater and down to a signal of a predetermined level; A feeder line sharing unit including a plurality of filters for receiving each of the plurality of signals output from the signal level adjusting unit and filtering the bands in a predetermined band, and outputting the signals output by the plurality of filters through a feeder line sharing terminal; And a distribution unit for distributing and outputting a signal output by the feeder line sharing unit to a plurality of antennas.

The signal level control unit may downgrade the signal output from the repeater to a 2 [W] level signal, and may include a Wilkinson type divider.

The repeater may be a multi-band repeater for transmitting and receiving signals in the PCS, WCDMA and WiBro band.

The distribution unit may include a first distribution unit which distributes and outputs a signal output by the feeder line sharing unit; And at least one second distribution unit for redistributing and outputting the signal distributed by the first distribution unit, wherein the first distribution unit has a T-junction or U with excellent passive inter-modulation distortion (PIMD) characteristics. It may include a -junction type distributor, the second distribution unit may include a Wilkinson type distributor.

The feeder line sharing unit may include: a first filter unit filtering a transmission / reception signal of the PCS; A second filter unit filtering the transmission / reception signal of the WCDMA; And a third filter unit filtering the transmission / reception signal of the WiBro.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, a feeder line sharing system in an in-building according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 is a block diagram of a feeder line sharing system in an in-building according to an embodiment of the present invention.

Referring to FIG. 1, the system includes a multi-band repeater 110, a plurality of signal level controllers 120, a feeder line sharing unit 130, and a distribution unit 140.

The multi-band repeater 110 is a repeater for providing a service having at least two or more bands to the building, and may be, for example, a triple band repeater capable of providing PCS, WCDMA, and WiBro services.

That is, the multi-band repeater 110 may provide PCS, WCDMA and WiBro services to the building by transmitting and receiving PCS signals, WCDMA signals and WiBro signals.

Of course, although the present invention has been described as providing a mobile communication service of multiple bands using a multi-band repeater, the present invention is not limited thereto, and a repeater for each mobile communication service, that is, a PCS repeater for providing a PCS and a WCDMA are provided. It will be appreciated by those skilled in the art that a multi-band mobile communication service may be provided using a plurality of repeaters such as a WCDMA repeater, a WiBro repeater providing WiBro, and the like.

The signal level adjusting unit 120 receives a signal output from the multi-band repeater 110 and down to a signal of a predetermined level to output the signal.

For example, the signal level control unit 120 down the signal output from the multi-band repeater 110, for example, a signal having a level of 10 [W] or 20 [W] to a signal having a level of 2 [W]. The output level can vary depending on the situation.

In this case, the signal level adjusting unit 120 may use a divider to output a signal down to a predetermined level to the plurality of feeder line sharing units 130, and it is preferable that the divider uses a Wilkinson type.

In addition, the signal level adjusting unit 120 may serve as a combiner that combines a plurality of signals received from the plurality of feeder line sharing units 130 and outputs them to the multi-band repeater 110.

Here, although the signal level adjusting unit 120 and the multi-band repeater 110 are separately illustrated, the function of the signal level adjusting unit 120 may be included in the multi-band repeater 110.

The feeder line sharing unit 130 receives the signals output from the plurality of signal level adjusting units 120, that is, the PCS signal, the WCDMA signal, and the WiBro signal, respectively, filters the set bands, and then filters the filtered signals through the feeder line sharing terminal. Output to the distribution unit 140.

Of course, the feeder line sharing unit 130 filters the signals received from the distribution unit 140 through the feeder line sharing end to each of the set bands, and then outputs to the multi-band repeater 110 through each signal level control unit 120. It may be.

In this case, the feeder line sharing unit 130 may include a plurality of filter units, and each filter unit may include at least one filter.

Referring to FIG. 2 as an example, the feeder line sharing unit 130 may include a first filter unit 210, a second filter unit 220, and a third filter unit 230.

The first filter unit 210 filters the PCS signal, and is received from the first transmission filter 211 and the distribution unit 140 that filter the PCS signal received from the signal level control unit 120 into a transmission band. The first reception filter 212 may filter the PCS signal to a reception band.

In this case, the first transmission filter 211 may be a band pass filter (BPF) for filtering the band 1840 ~ 1870 [MHz] corresponding to the transmission band of the PCS signal, the first reception filter 212 is It may be a band pass filter for filtering the band 1750 ~ 1780 [MHz] corresponding to the reception band of the PCS signal.

The second filter unit 220 is for filtering the WCDMA signal and is received from the second transmission filter 221 and the distribution unit 140 for filtering the WCDMA signal received from the signal level control unit 120 into a transmission band. The second receive filter 222 may filter the WCDMA signal into a reception band.

In this case, the second transmission filter 221 may be a band pass filter for filtering the band 2110 ~ 2170 [MHz] corresponding to the transmission band of the WCDMA signal, the second reception filter 222 corresponds to the reception band of the WCDMA signal It may be a band pass filter for filtering the 1920 ~ 1980 [MHz] band.

The third filter unit 230 is for filtering WiBro signals. The third filter unit 230 filters WiBro signals received from the signal level adjusting unit 120 and transmits them to the distribution unit 140 or transmits the WiBro signals received from the distribution unit 140. It may include a transmission and reception filter 231 for filtering and transmitting to the signal level control unit 120.

At this time, the transmission and reception filter 231 may be a band pass filter for filtering the 2300 ~ 2390 [MHz] band corresponding to the transmission and reception band of the WiBro signal.

As such, the feeder line sharing unit 130 shares the feeder line to the antenna ANT through a plurality of band pass filters and feeder line sharing terminals for providing each service, thereby providing an initial facility for providing PCS, WCDMA, and WiBro services. The cost can be reduced, and the convenience of maintenance can be provided by using common equipment rather than a plurality of equipment.

Referring back to FIG. 1, the distribution unit 140 distributes and outputs signals output through the feeder line sharing terminal of the feeder line sharing unit 130 to a plurality of antennas.

That is, the distribution unit 140 distributes the PCS signal, the WCDMA signal and the WiBro signal output from the feeder line sharing unit 130 to a plurality of antennas provided in the building, thereby outputting the PCS, WCDMA and WiBro services through the respective antennas. Can be provided.

At this time, it is preferable that the distribution unit 140, the feeder line, and the antenna use a wide band for providing PCS, WCDMA, and WiBro services. That is, the distribution unit 140 having a band capable of covering all of the PCS band, the WCDMA band, and the WiBro band, a feed line, and an antenna are used.

Here, the distribution unit 140 may include a first distribution unit 310 and a second distribution unit 320 as shown in the example shown in FIG.

The first distribution unit 310 is a distribution unit for solving the PIMD problem generated between the WiBro signal and the WCDMA signal output from the feeder line sharing unit 130, and the antenna or the second output signal from the feeder line sharing unit 130 Distribution is output to the distribution unit 320.

In this case, the first distribution unit 310 preferably includes a T-junction or U-junction type distributor having excellent PIMD characteristics.

Here, PIMD is a phenomenon that can occur in all passive devices and two or more frequency components combine to form a new frequency component. When the generated PIMD is a transmission frequency band, its size is compared with a transmission signal. Is very small and does not cause a big problem. However, if the generated PIMD component is a reception frequency band of a communication system, even if the size is very small, it may have a big effect on the receiver.

In this case, if the receiver experiences deterioration in reception sensitivity due to PIMD, that is, backward degradation, reverse cell coverage is reduced due to backward degradation. Accordingly, a repeater may be additionally required to cover a certain area.

Therefore, in the present invention, the first distribution unit 310 directly connected to the feeder line sharing end of the feeder line sharing unit 130 is configured as a T-junction or U-junction type divider that generates a small PIMD, thereby preventing backward degradation of the receiver. Overcome PIMD problems that may arise

The second distribution unit 320 may be at least one distribution unit that redistributes and outputs the signals distributed by the first distribution unit 310. That is, the second distribution unit 320 may redistribute the distributed signals to a directly connected antenna or another at least one second distribution unit 320 and output the distributed signals.

In this case, the second distributor 320 may include a Wilkinson-type distributor capable of minimizing reverse insertion loss. The second distributor 320 may include a 1: 2 divider for dividing one signal into two outputs. It may include a 1: 3 divider for dividing one signal into three and outputting the signal, and may include a 1: N divider according to circumstances.

That is, the distribution unit 140 solves the PIMD problem between the WCDMA signal and the WiBro signal by using the first distribution unit 310 including a T-junction or U-junction type distributor having excellent PIMD characteristics. The second distribution unit 320 including a distributor provides PCS, WCDMA, and WiBro services to all areas of the building.

As can be seen, the distribution unit 140 includes a first distribution unit 310 and a backward insertion loss composed of a U-junction or T-junction type divider that can minimize the PIMD problem generated between the WiBro signal and the WCDMA signal. Since it includes a second distribution unit 320 composed of a Wilkinson type divider can minimize the reverse insertion loss it is possible to prevent the degradation of the reverse capacity that may be caused by the rise of the noise level of the WCDMA reception band .

Of course, the first distribution unit 310 may combine the signals received through the antenna and the second distribution unit 320 to perform the function of a combiner to output to the feeder line sharing unit 130, the second distribution unit likewise 320 may also perform a function of a combiner for combining signals received from at least one antenna or another second distribution unit and outputting the combined signal to the first distribution unit 310 or another second distribution unit.

As described above, the feeder line sharing system according to an embodiment of the present invention solves a PIMD problem that may occur between the feeder line sharing unit 130 and the WCDMA signal and the WiBro signal that can provide PCS, WCDMA and WiBro services through a shared feeder line. By minimizing it, it is possible to prevent the deterioration of backward capacity which may be caused by the noise level increase of the WCDMA reception band, and provide convenience in maintenance because the multi-band service is provided using the feed line sharing unit 130. Can reduce the initial equipment cost.

In addition, since the initial equipment cost can be reduced, communication cost can be reduced, thereby providing a high quality mobile communication service to mobile subscribers at a low price.

Although described in detail in the detailed description of the present invention to the in-building, the present invention is not limited to the in-building, it is applicable to all places where the repeater is installed due to the shaded area.

Of course, the present invention is preferably applied to a place where WCDMA and WiBro services are provided at the same time.

The feeder line sharing system in an in-building according to the present invention can be modified and applied in various forms within the scope of the technical idea of the present invention, and is not limited to the above-described embodiments. In addition, the embodiments and drawings are merely for the purpose of describing the contents of the invention in detail, not intended to limit the scope of the technical idea of the invention, the present invention described above is common knowledge in the technical field to which the present invention belongs As those skilled in the art can have various substitutions, modifications, and changes without departing from the spirit of the present invention, it is not limited to the embodiments and the accompanying drawings. And should be judged to include equality.

1 is a block diagram of a feeder line sharing system in an in-building according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an embodiment of a feeder line sharing unit illustrated in FIG. 1.

3 is a block diagram illustrating an exemplary embodiment of the distribution unit illustrated in FIG. 1.

<Explanation of symbols for the main parts of the drawings>

110: multi-band repeater

120: signal level control unit

130: feeder line sharing unit

140: distribution unit

210: first filter unit

220: second filter unit

230: third filter unit

310: first distribution unit

320: second distribution unit

Claims (9)

A plurality of signal level adjusting units which receive a signal output from the repeater and down to a signal of a predetermined level; A feeder line sharing unit including a plurality of filters for receiving each of the plurality of signals output from the signal level adjusting unit and filtering the bands in a predetermined band, and outputting the signals output by the plurality of filters through a feeder line sharing terminal; And A distribution unit for distributing and outputting a signal output by the feeder line sharing unit to a plurality of antennas Feeder line sharing system comprising a. The method of claim 1, The repeater A feeder line sharing system, which is a multi-band repeater for transmitting and receiving signals in multiple bands. The method according to any one of claims 1 and 2, The signal level control unit And a feeder line sharing system for lowering the signal output from the repeater to a signal of 2 [W] level. The method according to any one of claims 1 and 2, The signal level control unit Feeder line sharing system including Wilkinson type distributor The method according to any one of claims 1 and 2, The repeater Feeder line sharing system, a multi-band repeater that transmits and receives signals in the PCS, WCDMA, and WiBro bands. The method according to any one of claims 1 and 2, The distribution unit A first distribution unit for distributing and outputting a signal output by the feeder line sharing unit; And At least one second distribution unit for redistributing and outputting the signal distributed by the first distribution unit Feeder line sharing system comprising a. The method of claim 6, The first distribution unit Feeder line sharing system that includes a T-junction or U-junction type distributor with excellent passive inter-modulation distortion (PIMD) characteristics. The method of claim 6, The second distribution unit Feeder line sharing system with Wilkinson type distributor The method of claim 5, The feeder line sharing unit A first filter unit filtering the transmission / reception signal of the PCS; A second filter unit filtering the transmission / reception signal of the WCDMA; And Third filter unit for filtering the transmission and reception signal of the WiBro Feeder line sharing system comprising a.

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