KR101000397B1 - Apparatus for using common feeder cable in in-building and system thereof - Google Patents

Abstract

Disclosed are a feeder line sharing apparatus and system in an in-building. According to an embodiment of the present invention, a feeder line sharing apparatus includes: a first filter unit configured to filter a first service transmission signal and output the same to a feeder line sharing end, and to filter and output the first service reception signal to a repeater; A second filter unit for filtering a second service transmission signal and outputting the signal to the feeder line sharing terminal, and filtering the second service reception signal and outputting the second service reception signal to the repeater; And a band removing filter unit which removes a band corresponding to the second service reception signal from the first service transmission signal and outputs the band to the first filter unit.

In-building, feeder sharing, debanding, digital cellular system (DCS), personal communication services (PCS)

Description

Feeder sharing device and system in building {APPARATUS FOR USING COMMON FEEDER CABLE IN IN-BUILDING AND SYSTEM THEREOF}

The present invention relates to feeder line sharing, and more particularly, to share facilities such as feeders, distributors, and antennas in an in-building system that provides mobile communication services including digital cellular systems (DCS) and personal communication services (PCS). And a feeder line sharing device and system in an in-building.

The general in-building system provides mobile communication service together with the in-building dedicated base station in underground parking lot of large buildings such as department stores, 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. Whenever DCS, PCS, WCDMA (Wideband Code Division Multiple Access) and WiBro (Wireless Broadband internet) services are provided, separate equipment and facilities are implemented, which can make it difficult to distinguish not only equipment but also facilities. In addition, since the initial cost of the facility is in the thousands to hundreds of millions, it is possible to increase the cost of telecommunication costs due to excessive initial investment cost of the telecommunications provider.

Therefore, there is a need for a system that can provide services such as DCS / 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 services such as DCS, PCS, WCDMA and WiBro in the building through a shared feeder, distributor and antenna, convenient maintenance It is to provide a feeder line sharing device and system in an in-building that can provide the property and reduce the initial facility cost.

Another object of the present invention is to provide an apparatus and a system for sharing a power line in an in-building, which can prevent the reception sensitivity of the PCS from being degraded by the second harmonic component generated in the power amplifier of the DCS.

A feeder line sharing device according to an aspect of the present invention for achieving the above object is a first filter unit for filtering the first service transmission signal and outputs to the feeder line sharing end, the first service reception signal is filtered and output to the repeater ; A second filter unit for filtering a second service transmission signal and outputting the signal to the feeder line sharing terminal, and filtering the second service reception signal and outputting the second service reception signal to the repeater; And a band removing filter unit which removes a band corresponding to the second service reception signal from the first service transmission signal and outputs the band to the first filter unit.

In this case, the band elimination filter unit may be a band elimination filter which removes only a band corresponding to the received signal of the second service, and removes a band corresponding to the received signal of the second service and transmits the band elimination filter to the transmission signal of the first service. The corresponding band may be a low pass filter to pass through.

The first service transmission / reception signal may be a DCS signal, and the second service transmission / reception signal may be a PCS signal.

The apparatus may further include a third filter unit configured to filter a third service transmission signal to the feeder line sharing terminal, and to filter the third service reception signal to output the relayed signal to the repeater, wherein the third service transmission / reception signal May be a WCDMA or WiBro signal.

A feedline sharing system according to an aspect of the present invention includes a multi-band repeater for transmitting and receiving first service and second service signals; Receive the first service and the second service transmission signals from the multi-band repeater, filter the first service transmission signal to remove a band corresponding to the second service reception signal, and filter the filtered first service transmission A feeder line sharing unit for band-pass filtering the signal and the second service transmission signal into bands preset for each service and outputting the signal to the feeder line sharing terminal; And a distribution unit for distributing and outputting signals output to the feeder line sharing terminal to a plurality of antennas.

A feeder line sharing method according to an aspect of the present invention includes the steps of: receiving a first service signal and a second service signal from a repeater; Removing a band corresponding to the second service received signal from the first service signal; Band-pass filtering the first service signal and the second service signal from which a band corresponding to the second service received signal is removed to a band preset for each service; And outputting the band pass filtered signals through a feeder feeder sharing terminal.

Other objects and features of the present invention in addition to the above objects 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 apparatus and its system in an in-building according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

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 feeder line sharing unit 120, and a distribution unit 130.

The multi-band repeater 110 is a repeater that can provide at least two or more mobile communication services to the building. In the present invention, the multi-band repeater 110 may be a multi-band repeater capable of providing DCS and PCS services and WCDMA or WiBro services. The multi-band repeater 110 may provide DCS, PCS and WCDMA or WiBro services to the building by transmitting and receiving a DCS signal, a PCS signal, and a WCDMA signal or a WiBro signal.

Of course, although the present invention has been described as providing a mobile communication service of multiple bands using the multi-band repeater 110, the present invention is not limited thereto, and a DCS repeater, PCS, which provides a relay for each mobile communication service, that is, a DCS. 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 PCS repeater providing a WCDMA and a WCDMA repeater providing a WCDMA.

Therefore, the feeder relay system of the present invention may be configured using a plurality of repeaters as well as the multi-band repeater 110.

Hereinafter, it is assumed that the multi-band repeater 110 is a triple band repeater providing DCS, PCS, and WCDMA services.

The feeder line sharing unit 120 receives the DCS signal, the PCS signal, and the WCDMA signal received from the multi-band repeater 110 and filters the bands preset for each service, and distributes the filtered signals through the feeder line sharing unit. 130).

At this time, the feeder line sharing unit 120 from the multi-band repeater 110 in order to prevent the PCS reception sensitivity degradation caused by the second harmonic component of the DCS transmission signal which is the PCS reception signal band generated by the power amplifier of the DCS It is preferable to remove a band corresponding to the PCS received signal from the received DCS transmission signal. That is, the feeder line sharing unit 120 preferably includes a filter for removing a band corresponding to the received signal of the PCS from the transmission signal of the DCS.

Also, the feeder line sharing unit 120 receives the DCS signal, the PCS signal, and the WCDMA signal from which the band corresponding to the received signal of the PCS is removed, filters the transmitted signal band set in each service, and then filters the filtered signals to the feeder line sharing end. Output to the distribution unit 130 through.

In this case, the signal output to the distribution unit 130 may be a transmission signal of the DCS, PCS and WCDMA band-pass filtered to the transmission band of each service.

Of course, the feeder line sharing unit 120 filters the received signals of DCS, PCS and WCDMA received from the distribution unit 130 through the feeder line sharing terminal to the set reception signal band of each service, and then filters the filtered signals into a multi-band repeater ( 110).

Here, the feeder line sharing unit 120 may include a plurality of filter units for filtering the DCS, PCS, and WCDMA signals as described above, which will be described with reference to FIG. 2.

2 is a diagram illustrating an embodiment of a feeder line sharing unit, and as shown, the feeder line sharing unit 120 includes a band removing filter unit 210, a first filter unit 220, and a second filter unit ( 230 and a third filter unit 240 may be included.

The band elimination filter 210 removes a band corresponding to the PCS received signal from the DCS transmission signal received from the multi-band repeater 110 and outputs the band to the first filter unit 220.

In this case, the band removing filter 210 may be a band stop filter (BSF) that removes only a band corresponding to the PCS received signal, that is, a notch filter, and a band corresponding to the received signal of the PCS. It may be a low pass filter that passes the band corresponding to the transmission signal of the DCS while removing.

The first filter unit 220 filters the DCS signals, and includes a first transmission filter 221 and a distribution unit for filtering the DCS signal from which the predetermined band is removed by the band elimination filter 210 to the DCS transmission band. The first reception filter 222 may filter the DCS signal received from the 130 to the DCS reception band.

In this case, the first transmission filter 221 may be a band pass filter (BPF) for filtering the 869 ~ 894 [MHz] band corresponding to the transmission band of the DCS signal, the first reception filter 222 is It may be a band pass filter for filtering the band 824 ~ 849 [MHz] corresponding to the reception band of the DCS signal.

As can be seen through the band elimination filter 210 and the first filter unit 220, the feeder line sharing unit 120 of the present invention band eliminates the second harmonic component of the DCS transmission signal that may degrade the PCS reception sensitivity. The first removal using the filter unit 210 and the second removal using the first transmission filter 221 may prevent the PCS reception sensitivity from being degraded by the second harmonic component of the DCS transmission signal.

That is, when the DCS transmission signal is output through the antenna without removing the band corresponding to the PCS reception signal, the DCS transmission signal is input through the DCS transmission antenna to the signal transmitted from the PCS terminal to the PCS antenna, that is, the uplink signal transmitted to the repeater. Since the signal acts as a noise causing the degradation of the PCS reception sensitivity, it is intended to prevent such degradation of the PCS reception sensitivity by using the band cancellation filter 210.

The second filter unit 230 is for filtering PCS signals, and is received from the second transmission filter 231 and the distribution unit 130 for filtering the PCS signal received from the multi-band repeater 110 to the PCS transmission band. And a second receive filter 232 that filters the PCS signal to the PCS receive band.

In this case, the second transmission filter 231 may be a band pass filter for filtering the band 1840 ~ 1870 [MHz] corresponding to the transmission band of the PCS signal, the second reception filter 232 corresponds to the reception band of the PCS signal. It may be a band pass filter for filtering the band 1750 ~ 1780 [MHz].

The third filter unit 240 is to filter the WCDMA signals, and the WCDMA received from the third transmission filter 241 and the distribution unit 130 to filter the WCDMA signal received from the multi-band repeater 110 into a transmission band. A third receive filter 242 may filter the signal to a receive band.

In this case, the third transmission filter 241 may be a band pass filter for filtering the band 2110 ~ 2170 [MHz] corresponding to the transmission band of the WCDMA signal, the third reception filter 242 corresponds to the reception band of the WCDMA signal It may be a band pass filter for filtering the 1920 ~ 1980 [MHz] band.

Here, when the multi-band repeater is a triple band repeater providing DCS, PCS and WiBro services, it is obvious that the feeder line sharing unit should be provided with a filter unit for filtering WiBro signals.

That is, the feeder line sharing unit preferably includes a filter for filtering the WiBro signal received from the multi-band repeater and the WiBro signal received from the distribution unit 130, wherein the filter for filtering the WiBro signal is a transmission and reception band of the WiBro signal It may be a band pass filter for filtering the 2300 ~ 2390 [MHz] band corresponding to.

Referring back to FIG. 1, the distribution unit 130 distributes and outputs signals output through the feeder line sharing terminal of the feeder line sharing unit 120 to the plurality of antennas ANT.

That is, the distribution unit 130 distributes the DCS signal, the PCS signal, and the WCDMA signal output from the feeder line sharing unit 120 to the plurality of antennas provided in the building through the feeder line, thereby outputting the DCS using the shared feeder line. , PCS and WCDMA services can be provided.

At this time, it is preferable that the distribution unit 130, the feeder and the antenna be used for broadband so that DCS, PCS, and WCDMA and WiBro services can be provided. That is, by using the distribution unit 130, the feeder line and the antenna that can cover all of the DCS band, PCS band, WCDMA band and WiBro band as needed, the service of all bands can be provided to the user using the common facilities. have.

Dispensing unit 130 may include at least one or more distributors 310, as in the example shown in FIG. 3, which may be a Wilkinson type distributor.

Of course, the divider 310 included in the divider 130 may be a 1: 2 divider that divides and outputs a single signal into two, or may be a 1: 3 divider that divides and outputs a single signal into three. In some cases, it may be a 1: N distributor.

Of course, the divider constituting the divider 130 may perform a function of a combiner that combines signals received through a plurality of antennas or antennas and other splitters and outputs them to the feeder line sharing unit 120 or to other splitters. .

Thus, the feeder line sharing apparatus and system according to an embodiment of the present invention removes the second harmonic component corresponding to the received signal of the PCS generated by the DCS power amplifier to share the feeder line sharing the DCS, PCS and WCDMA and WiBro services By providing it, it is possible to prevent deterioration in reception sensitivity of the PCS, and to provide multi-band service through a shared feeder line, thereby providing convenience in maintenance and reducing initial installation 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 the DCS and PCS services are provided at the same time.

4 is an operation flowchart of a feeder line sharing method according to an embodiment of the present invention, which is an operation flowchart for providing DCS and PCS services through a shared feeder line.

Referring to FIG. 4, the feeder line router receives a DCS signal and a PCS signal output from each of a plurality of repeaters or a multi-band repeater (S410).

The feed line router removes a band corresponding to a reception band of the PCS signal from the received DCS signal (S420).

In this case, the feed line router may remove a band corresponding to the reception band of the PCS signal from the DCS signal, that is, 1750 to 1780 [MHz] band, using a band removing filter or a low pass filter.

As can be seen in step S420, the second harmonic component of the DCS signal, which may cause PCS reception sensitivity degradation, is first removed using a band cancellation filter or a low pass filter.

The feed line router band-pass filters the DCS signal from which the reception band of the PCS signal is removed to the transmission band of the DCS signal, and band-pass filters the PCS signal to the transmission band of the PCS signal (S430).

At this time, the band pass filtering of the DCS signal and the band pass filtering of the PCS signal may be performed in parallel. By band-pass filtering the DCS signal, the second harmonic component of the DCS signal may be secondarily removed.

Of course, when the building provides the WCDMA service, the feeder router may receive the WCDMA signal from the WCDMA repeater or the multi-band repeater to perform band pass filtering to the transmission band of the WCDMA signal.

The feeder liner outputs the band pass filtered signals, that is, the DCS signal and the PCS signal to the feeder line sharing terminal to provide the DCS service and the PCS service through the shared feeder line and the plurality of antennas (S440).

The feeder line sharing device and 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 the present invention 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, and are not intended to limit the scope of the technical idea of the invention, the present invention described above is common in the art to which the present invention belongs. As those skilled in the art can make various substitutions, modifications, and changes without departing from the technical spirit of the present invention, it is not limited to the embodiments and the accompanying drawings. Judgment should be made including scope and equivalence.

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.

4 is a flowchart illustrating a feeder line sharing method according to an exemplary embodiment of the present invention.

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

110: multi-band repeater

120: feeder line sharing unit

130: distribution

210: band removing filter unit

220: first filter unit

230: second filter unit

240: third filter unit

Claims (12)

A first filter unit filtering the first service transmission signal and outputting the same to the feeder line sharing terminal, and filtering and outputting the first service reception signal to a repeater; A second filter unit for filtering a second service transmission signal and outputting the signal to the feeder line sharing terminal, and filtering the second service reception signal and outputting the second service reception signal to the repeater; And Band elimination that prevents degradation of the second service reception sensitivity by harmonic components of the first service transmission signal by removing the band corresponding to the second service reception signal from the first service transmission signal and outputting the band to the first filter unit. Filter part Feeder line sharing device comprising a. The method of claim 1, The band elimination filter unit And a band elimination filter for removing only a band corresponding to a received signal of the second service. The method of claim 1, The band elimination filter unit And a low pass filter configured to pass a band corresponding to a transmission signal of the first service while removing a band corresponding to the received signal of the second service. The method of claim 1, The first service transmission and reception signal is DCS signal, The second service transmission and reception signal is Feeder line sharing device, which is a PCS signal. The method of claim 1, A third filter unit filtering a third service transmission signal and outputting the filtered signal to the feeder line sharing terminal, and filtering the third service reception signal and outputting the third service reception signal to the repeater Feeder line sharing device further including. The method of claim 5, The third service transmission and reception signal is Feeder line sharing device, which is a WCDMA or WiBro signal. The method of claim 1, The repeater And a multi-band repeater for transmitting and receiving the first service and the second service signals. A multi-band repeater for transmitting and receiving first service and second service signals; Receive the first service and the second service transmission signals from the multi-band repeater, filter the first service transmission signal to remove a band corresponding to the second service reception signal, and filter the filtered first service transmission A feeder line sharing unit for band-pass filtering the signal and the second service transmission signal into bands preset for each service and outputting the signal to the feeder line sharing terminal; And Distribution unit for distributing the signal output to the feeder line sharing end to a plurality of antennas And a feedline sharing system for preventing the second service reception sensitivity from being degraded by harmonic components of the first service transmission signal. The method of claim 8, The first service transmission and reception signal is DCS signal, The second service transmission and reception signal is PCS signal, The feeder line sharing unit And a power line sharing system for removing a band corresponding to the PCS received signal from the DCS transmission signal using a low pass filter or a band cancellation filter. The method of claim 8, The distribution unit Feeder line sharing system including a Wilkinson type distributor. Receiving a first service signal and a second service signal from a repeater; Removing a band corresponding to the second service received signal from the first service signal; Band-pass filtering the first service signal and the second service signal from which a band corresponding to the second service received signal is removed to a band preset for each service; And Outputting the band pass filtered signals through a feeder line sharing terminal; And the second service reception sensitivity is prevented from being degraded by harmonic components of the first service transmission signal. The method of claim 11, The first service signal is DCS signal, The second service signal is Feeder line sharing method, which is a PCS signal.

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