KR20140004455A - Apparatus for relaying communication signal to protecting building - Google Patents

Abstract

The present invention relates to an apparatus for relaying communication signals to protect a building. The present invention provides an apparatus for relaying communication signals including a service antenna, located inside of a building, for wireless connection with a terminal located inside of the building; a relay body connected with the service antenna with a coaxial cable; an inner wall module connected with the relay body with a coaxial cable; an outer module installed on the outer wall of the building in an area corresponding to the area where the inner module is installed and transmitting/receiving wirelessly a wireless communication signal to/from the inner wall module across the building wall; a link module connected with the outer module with a coaxial cable; and a link antenna for wireless connection with a base station and connected with the link module with a coaxial cable. [Reference numerals] (1) Terminal; (120) Relay body; (130) Link module; (2) Base station

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a communication signal relay device for protecting a building,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a communication signal relaying technique, and more particularly, to a communication signal relaying device for protecting a building without damaging it when a communication device installed inside and outside the building is installed.

Generally, a wireless communication repeater is installed to solve a wireless communication shadow area occurring in a building such as a house, an office, or an underground space. In general, an antenna (hereinafter referred to as a "link antenna") for connection to a base station is installed outside the building, and an antenna (hereinafter referred to as a "service antenna" And the service antenna through a coaxial cable and amplify the bi-directional signal. A signal transmitted from the base station to the terminal (hereinafter referred to as "forward signal") is received by the link antenna, and then transmitted to the repeater main body via the coaxial cable. This signal is amplified in the main body of the repeater and sent to the service antenna through the coaxial cable, radiated from the service antenna and transmitted to the terminal. On the other hand, a signal transmitted from the terminal to the base station (hereinafter referred to as "reverse signal") is received by the service antenna and then transmitted to the repeater main body through the coaxial cable. This signal is amplified in the repeater main body and sent to the link antenna through the coaxial cable, radiated from the link antenna and transmitted to the base station.

Thus, a coaxial cable is required to connect the exterior and the interior of the building, and it is generally installed through the exterior and interior of the building. The installation of such a coaxial cable causes the following problems. First, if there is no room for the coaxial cable to pass through, a hole should be drilled in a part of the building. Pitting holes in a building's walls or windows can result in higher construction costs and damage to buildings. In particular, in the case of a tenant in a building, it is impossible to install a repeater without the consent of the landlord, or after the monetary compensation for the building damage. It also causes many inconveniences due to the noise generated when drilling the hole. Secondly, fortunately, if there is a space that can pass through (for example, an air conditioner outdoor unit wiring, etc.), the space may not be suitable for installing a repeater, and there may be a size limitation. Therefore, the repeater should be designed so that the cable thickness is thin and the allowable length is as long as possible in order to reduce such restriction. When RF signals are transmitted over coaxial cable, if the thickness of the coaxial cable is long and thin, the attenuation is greatest. Therefore, the design of the repeater becomes more difficult to offset this disadvantage. That is, the price rises. Therefore, it is necessary to study to solve the problems caused by penetrating the inside and outside of the building when installing the above-mentioned coaxial cable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and has an object of providing a communication equipment such as a wireless communication repeater and the like which can connect the inside and the outside of a building without damaging buildings such as walls, And to provide a communication signal relay device to which the technology is applied.

According to another aspect of the present invention, there is provided a communication signal relay device including: a service antenna for wireless connection with a terminal located inside a building; A repeater main body connected to the service antenna through a coaxial cable; An inner wall antenna connected to the main body of the repeater by a coaxial cable and installed on the inner surface of the wall of the building; An outer wall antenna installed on an outer surface of a wall of the building in an area corresponding to an area where the inner wall antenna is attached and wirelessly connecting with the inner wall antenna through the building wall; And a link antenna connected to the outer wall antenna through a coaxial cable for wireless connection with the base station.

When the forward signal from the base station is received, the link antenna, the outer wall antenna, the inner wall antenna, the repeater main body, and the service antenna sequentially transmit the forward signal to the terminal.

When the reverse signal is received from the terminal, the service antenna, the repeater main body, the inner wall antenna, the outer wall antenna, and the link antenna sequentially transmit the reverse signal to the base station.

The link antenna receives a forward signal from the base station and transmits the forward signal to the outer wall antenna. The outer wall antenna radiates the forward signal. The inner wall antenna receives the forward signal, The repeater body amplifies the forward signal transmitted thereto, and provides the amplified forward signal to the service antenna, and the service antenna transmits the provided forward signal to the terminal.

The service antenna receives a reverse signal from the terminal and transmits the reverse signal to the repeater main body. The repeater main unit amplifies the reverse signal to provide an amplified reverse signal to the inner wall antenna, The outer wall antenna receives the radiated reverse signal and transmits the received reverse signal to the link antenna, and the link antenna transmits the transmitted reverse signal to the base station.

According to another aspect of the present invention, there is provided a communication signal relay apparatus including: a service antenna for wireless connection with a terminal located inside a building; A repeater main body connected to the service antenna through a coaxial cable; An inner wall module connected to the main body of the repeater by a coaxial cable and installed on a wall inner surface of the building; An outer wall module installed on an outer surface of a wall of the building in an area corresponding to an area where the inner wall module is installed and transmitting and receiving wireless communication signals wirelessly with the inner wall module via the building wall; A link module connected to the outer wall module by a coaxial cable; And a link antenna connected to the link module through a coaxial cable for wireless connection with the base station.

Wherein the inner wall module comprises: an inner wall antenna for transmitting and receiving the wireless communication signal; a wireless power transmitter for converting an applied DC voltage into a wireless power signal when a DC voltage is applied through the coaxial cable from the repeater main body; And a wireless power transmission antenna for radiating a radio signal.

Wherein the outer wall module comprises an outer wall antenna for transmitting and receiving the wireless communication signal, a wireless power receiving antenna for receiving the radiated wireless power signal, and a controller for converting the received wireless power signal to a DC voltage, And a wireless power receiver.

Wherein the link antenna, the link module, the outer wall antenna of the outer wall module, the inner wall antenna of the inner wall module, the repeater main body, and the service antenna sequentially relay the forward signal, To the display device.

Wherein the service antenna, the main body of the repeater, the inner wall antenna of the inner wall module, the outer wall antenna of the outer wall module, and the link antenna repeatedly transmit the reverse signal to the base station when the reverse signal is received from the terminal .

The link module, when receiving the forward signal from the base station, transmits the forward signal to the link module. The link module amplifies the forward signal and transmits the amplified forward signal to the outer wall antenna The inner wall antenna of the inner wall module provides a radiated forward signal to the repeater body, the repeater body amplifies the provided forward signal, and the service antenna And the service antenna transmits the forward signal to the mobile station.

The service antenna receives the reverse signal from the terminal and transmits the reverse signal to the repeater main body. The repeater main body amplifies the reverse signal and provides it to the inner wall antenna of the inner wall module. The inner wall antenna radiates the reverse signal , The outer wall antenna of the outer wall module receives the uplink signal and transmits the uplink signal to the link module, the link module transmits the uplink signal to the link antenna, and the link antenna transmits the uplink signal to the base station .

According to an aspect of the present invention, there is provided a communication signal relay device including: a camera located outside a building; An outer wall module connected to the camera by an unshielded twisted pair (UTP) cable and installed on a wall outer surface of the building; An inner wall module installed on an inner surface of a wall of the building in an area corresponding to an area where the outer wall module is installed and transmitting and receiving a wireless LAN signal wirelessly with the outer wall module via the building wall; And a screen receiver located inside the building and connected to the inner wall module by a UTP cable.

The external wall module includes an external wall access point for receiving the Ethernet signal including the screen data photographed by the camera and converting the received Ethernet signal into a wireless LAN signal, and an external wall antenna radiating the wireless LAN signal The inner wall module includes an inner wall antenna for receiving the wireless LAN signal, and an inner wall access point for converting the received wireless LAN signal into an Ethernet signal and transmitting the Ethernet signal to the screen receiver.

The inner wall access point is characterized in receiving power from the image receiver via a UTP cable. Wherein the inner wall module comprises: a power device for receiving power from the inner wall access point; A wireless power transmitter for receiving power from the power device and converting the power into a wireless power signal; And a wireless power transmission antenna for radiating the wireless power signal.

And the outer wall module includes a wireless power receiving antenna for receiving the wireless power signal; A wireless power receiver that receives the wireless power signal from a wireless power receive antenna to power the outer wall access point to drive the outer wall access point and to power the PSE; And the PSE that powers the power supply to the outer wall access point so that the camera can be driven. Accordingly, the outer wall access point supplies power received from the PSE to the camera.

According to the present invention, there is an advantage that a communication signal relay device can be installed without drilling a hole for a coaxial cable connection to a building, thereby protecting the building. In addition, the wiring can be connected to a desired path, thereby reducing the cost.

1 is a block diagram illustrating a structure of a communication signal relay apparatus according to a first embodiment of the present invention.
2 is a diagram for explaining path loss.
3 and 4 are views for explaining a structure of a communication signal relay device according to a second embodiment of the present invention.
5 and 6 are views for explaining a communication signal relay apparatus according to a third embodiment of the present invention.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

1 is a block diagram illustrating a structure of a repeater according to a first embodiment of the present invention.

Referring to FIG. 1, a repeater 100 according to an embodiment of the present invention relays a wireless communication signal between a terminal 1 and a base station 2 in a building. The repeater 100 includes a service antenna 110, a repeater main body 120 and an inner wall antenna 180 installed inside a building and a link antenna 140 and an outer wall antenna 190 installed outside the building do. Except for the wireless connection between the inner wall antenna 180 and the outer wall antenna 190, connections between the remaining components are made through the coaxial cables 101, 103 and 105.

The link antenna 140 is located outside the building and is an antenna for wireless connection with the base station 2. The service antenna 110 is located inside the building and is an antenna for wireless connection with the terminal 1. [ The repeater main body 130 is connected to the link antenna 140 and the service antenna 110 between the link antenna 140 and the service antenna 110 to generate a forward signal transmitted from the base station 2 toward the terminal 1 And a reverse signal transmitted in the direction from the terminal 1 to the base station 2. The connection between the link antenna 140 and the service antenna 110 is made through the coaxial cables 101, 103 and 105 and the inner wall antenna 180 and the outer wall antenna 190.

The connection between the respective components of the repeater 100 will now be described. The service antenna 110 is connected to the repeater main body 120 through the coaxial cable 101 and the repeater main body 120 is connected to the inner wall antenna 180 through the coaxial cable 103. Here, the inner wall antenna 180 is provided on the inner surface of the wall 3. In addition, the outer wall antenna 190 is provided on the outer surface of the wall 3 in the area corresponding to the area where the inner wall antenna 180 is installed. The connection between the inner wall antenna 180 and the outer wall antenna 190 is connected wirelessly via the wall 3. Further, the outer wall antenna 190 is connected to the link antenna 140 through a coaxial cable 105.

The forward signal transmitted from the base station 2 to the terminal 1 is transmitted to the base station 2 through the link antenna 140, the outer wall antenna 190, the inner wall antenna 190 180, the repeater main body 120, and the service antenna 110 to the terminal 1. This forward signal relay process will be described in more detail as follows.

When the base station 2 transmits a forward signal, the link antenna 140 receives the forward signal, and the received forward signal is transmitted to the outer wall antenna 190 via the coaxial cable 18. This forward signal is again radiated by the outer wall antenna 190 to the inner wall antenna 19 and the radiated forward signal is received by the inner wall antenna 19. [ The signal received from the inner wall antenna 19 is transmitted to the repeater main body 130 and amplified by the repeater main body 130 and transmitted to the service antenna 110 through the coaxial cable 17, And emits the forward signal, which is transmitted to the terminal 1. [

The reverse signal transmitted from the terminal 1 to the base station 2 is transmitted to the service antenna 110, the repeater main body 120, the inner wall antenna 180, the outer wall antenna 190, and the link antenna 140 to the base station 2. This reverse signal relay process will be described in more detail as follows.

When the terminal 1 transmits a reverse signal, the service antenna 110 receives the signal and transmits it to the repeater main body 130 through the coaxial cable 17. The repeater main body 130 amplifies the signal, And transmits it to the inner wall antenna 19 through the cable 13. The inner wall antenna 19 emits this reverse signal. Then, the outer wall antenna 190 receives the radiated reverse signal, and the received reverse signal is transmitted to the link antenna 140 through the coaxial cable 18. The link antenna 140 emits this reverse signal, and the emitted reverse signal is transmitted to the base station 2.

As described above, when an antenna is attached to the inside and outside of the building outer wall and the inner wall to transmit forward and backward signals, it is possible to solve a problem that occurs when a signal is transmitted using only a coaxial cable. That is, since there is no damage to the building, the repeater can be installed in an optimum position without restriction.

Meanwhile, in the above-described method, a path loss may occur between the inner wall antenna 180 and the outer wall antenna 190. Therefore, since the inner wall antenna 180 and the outer wall antenna 190 are in close contact with the wall surface, the path loss between the two antennas 180 and 190 can be determined according to the material and thickness of the wall surface. For example, path loss may be greater for concrete than for materials such as glass. The performance of the repeater 100 may be degraded due to the path loss between the link antenna 140 and the repeater main body 120 when the path loss is large enough to cause performance problems (e.g., in the case of thick concrete walls) have.

2 is a diagram for explaining path loss.

In FIG. 2, a comparison is made with the conventional method (A) in order to find out that the path loss affects the performance of the repeater in the case (B) of the first embodiment of the present invention passing through the outer wall of the building through the antenna.

The total gain Gs and the forward output D out_pwr of the conventional method A are expressed by Equation (1) below.

[Equation 1]

Total antenna gain (Gs) = Repeater body gain (Gr) - Link antenna cable loss (L_loss) - Service antenna cable loss (S_loss)

Link Antenna Input (Din_pwr) = Link Gain (Gr) - Link Antenna Cable Loss (L_loss) - Service Antenna Cable Loss (S_loss) + Link Antenna Input (Din_pwr) - Forward Output (D out_pwr) = Total Gain

(Uin_pwr) = Total antenna gain (Uin_pwr) = Link antenna gain (Gr) - Link antenna cable loss (L_loss) - Service antenna cable loss (S_loss) + Service antenna input (Uin_pwr)

The total gain Gs and the forward output D out_pwr of the first embodiment B of the present invention are expressed by Equation (2) below.

&Quot; (2) "

Total antenna gain (Gs) = Repeater body gain (Gr) - Link antenna cable loss (L_loss) - Service antenna cable loss (S_loss) - Wall passing loss (W_loss)

Link antenna input (Din_pwr) - Link antenna gain (Gr) - Link antenna cable loss (L_loss) - Service antenna cable loss (S_loss) + Link antenna input (Din_pwr) - Forward output (D out_pwr) = Total gain Wall passing loss (W_loss)

(Uin_pwr) = Link antenna gain (Gr) - Link antenna cable loss (L_loss) - Service antenna cable loss (S_loss) + Service antenna input (Uin_pwr) - Wall Pass loss (W_loss)

As shown in the figure, when the characteristics of the antenna and the repeater are the same and the installation position and the cable length are the same, the difference from the conventional method is the path loss (W_loss) when passing through the inner wall antenna 180 and the outer wall antenna 190, Hereinafter referred to as "wall passage loss").

When passing through the wall through the inner wall antenna 180 and the outer wall antenna 190, the total gain and the bi-directional output decrease, respectively. If the wall through-hole loss is not large, there is no problem, but in many cases, the overall performance may deteriorate significantly. Passing through a 1 cm thick glass can result in losses of only a few dB, but more than a few tens of dB of loss may occur when passing through a plywood wall of 5 cm or more thickness. If the wall passage loss is more than several tens of dB, the overall performance may seriously deteriorate and the repeater may not be usable.

According to the second embodiment of the present invention, a loss compensation amplifier (link module) is added to the link antenna 140 to compensate for the wall passing loss. That is, if a loss compensation amplifier is provided on the side of the link antenna 140, the gain of the loss compensation amplifier cancels the wall passing loss, so that the total gain and the bi-directional output do not decrease. In addition, loss compensating amplifiers also compensate for loss of coaxial cable, so that gain and power loss are eliminated even if the cable length is long.

On the other hand, when the amplifier for loss compensation is added, a power source for supplying the loss compensation amplifier is required. In this case, power lines must be pulled from inside the building, which can lead to the same problems (wall damage, etc.) as the initial penetration of the coaxial cable. Therefore, the power source must pass through the wall in the same manner as the wireless communication signal. In the second embodiment of the present invention, the power source passes through the wall without puncturing the wall. That is, a wireless power transmitter is installed inside a building, a wireless power receiver is installed outside the building, power is supplied from the repeater main body, and the wireless power transmitter is transmitted to the wireless power receiver through the wireless power transmitter. In this manner, power is supplied through the wall by radio. The second embodiment of the present invention will now be described.

3 and 4 are views for explaining the structure of a repeater according to a second embodiment of the present invention.

3 and 4, a repeater 100 according to an embodiment of the present invention relays wireless communication signals between a terminal 1 and a base station 2 in a building. The repeater 100 includes a service antenna 110 installed inside a building, a repeater main body 120 and an inner wall module 200, an outer wall module 300 installed outside the building, a link module 130, (140). Except for the wireless connection of the inner wall module 200 and the outer wall module 300, the connection between the respective components is made up of the coaxial cables 101, 103, 105 and 107. In particular, the inner wall module 200 includes an inner wall antenna 202, a wireless power transmitter 203, and a wireless power transmission antenna 204. The outer wall module 300 includes an outer wall antenna 302, a wireless power receiver 303, and a wireless power receiving antenna 304.

The service antenna 110 is located in the building and establishes a wireless connection with the terminal 1 located in the building. The repeater main body 120 is connected to the service antenna 110 through a coaxial cable 101. The repeater main body 120 is connected to the inner wall module 200 through the coaxial cable 103.

As shown, the inner wall module 200 is installed on the inner surface of the building wall 3. The outer wall module 300 is installed on the outer surface of the building wall 3 in correspondence with the area where the inner wall module 200 is installed. The inner wall module 200 and the outer wall module 300 communicate wirelessly and communicate with each other. The inner wall module 200 receives power from the repeater main body 120 and transmits the received power to the outer wall module 300).

The outer wall module 300 is connected to the link module 130 by a coaxial cable 105 and the link module 130 is connected to the link antenna 140 by a coaxial cable 107. The link antenna 140 is wirelessly connected to the base station 2.

The forward signal transmitted from the base station 2 is received by the link antenna 140 and then transmitted to the link module 130 via the coaxial cable 107. The link module 130 amplifies the forward signal and the amplified forward signal is transmitted to the outer wall module 300 again. And is radiated from the outer wall antenna 302 of the outer wall module 300 to the inner wall antenna 202 and transmitted to the inner wall antenna 202 of the inner wall module 200. The forward signal received at the inner wall antenna 202 is transmitted to the repeater main body 120 and the forward signal is amplified at the repeater main body 120 and transmitted to the service antenna 110 through the coaxial cable 101. Then, the forward signal is radiated from the service antenna 110 and transmitted to the terminal 1.

Conversely, the reverse signal transmitted from the terminal 1 is received by the service antenna 110 and then transmitted to the repeater main body 120 through the coaxial cable 101, amplified by the repeater main body 120, And is transmitted to the inner wall antenna 203 of the inner wall module 200 through the antenna. This reverse signal is again radiated from the inner wall antenna 202 to the outer wall antenna 302 and received by the outer wall antenna 302. The backward signal received from the outer wall antenna 302 is sent to the link module 130 through the coaxial cable 105 and the link module 130 amplifies the backward signal. The amplified reverse signal is transmitted to the link antenna 140 again, and the transmitted reverse signal is radiated from the link antenna 140 and transmitted to the base station 2.

As described above, according to the present invention, the path loss can be compensated for by amplifying the forward and reverse signals through the link module 130, thereby enabling smooth communication.

On the other hand, in order for the link module 130 to amplify the reverse and forward signals, the link module 130 must be supplied with power. A power supply method according to an embodiment of the present invention will now be described. A DC voltage is applied to the coaxial cable 103 connected to the inner wall module 200 in the repeater main body 120 and connected to the inner wireless power transmitter 203 in the inner wall module 200. The DC voltage is transformed into a wireless power signal at the wireless power transmitter 203 and radiated from the wireless power transmission antenna 204 of the wireless power transmitter 203 to the wireless power reception antenna 303 of the outer wall module 300. The wireless power signal received at the wireless power receiver antenna 303 of the outer wall module 300 is input to the wireless power receiver 303 and is again changed to a DC voltage. This DC voltage is applied to the coaxial cable 105 connected to the link module again and supplied to the link module 130. [

Meanwhile, as described above, the elements constituting the present invention are separated by modules for performing respective functions and connected through coaxial cables, but adjacent modules may be integrated for convenience of installation and use. For example, the service antenna 110 may be embedded in the repeater main body 120, or the link antenna 140 may be embedded in the link module 130. Also, the link module 130 and the outer wall module 300 may be integrated, or the repeater main body 120 and the inner wall module 200 may be integrated. Although only one wall is described in the embodiment, in the case of a building having a plurality of walls, a pair of the inner module 200 and the outer module 300 may be provided on each of the plurality of walls.

The present invention uses a technique of wirelessly transmitting signals and electric power in order to allow a coaxial cable of a repeater to pass through a wall without passing through a hole in the wall as described above, Can be solved.

5 and 6 are views for explaining a communication signal relay apparatus according to a third embodiment of the present invention.

Referring to FIG. 5, according to the third embodiment of the present invention, it is assumed that a camera 520 for a CCTV (closed circuit television) is installed outside a building, and a CCTV screen receiver 510 is installed inside a building do. According to the related art, the camera 520 and the screen receiver 510 must make a hole in a wall of a building when transmitting / receiving through an Ethernet signal including image data using an unshielded twisted pair (UTP) cable . However, according to the third embodiment of the present invention, since the Ethernet signal is transmitted and received between the inner wall module 1200 and the outer wall module 1300 via the wireless communication, the wall does not need to be punched .

The inner wall module and the outer wall module will now be described in more detail.

6, the communication device according to the third embodiment of the present invention includes an inner wall module 1200 and an inner wall module 1200 installed on an inner surface of a building wall 1400, And an outer wall module 1300 installed on the outer surface of the building wall 1400 in the area where the building wall 1400 is installed. The inner wall module 1200 is connected to the CCTV screen receiver 510 through the UTP cable 1201. The outer wall module 1300 is connected to the camera 520 through a UTP cable 1301.

The inner wall module 1200 includes an inner wall antenna 1202, an inner access point (Access Point or WiFi Access Point) 1203, a Power over Ethernet (PD) Powered Device 1204, a wireless power transmitter 1205, And a wireless power transmission antenna 1206.

The outer wall module 1300 includes an outer wall antenna 1302, an outer wall access point 1303, a power sourcing equipment (PSE) 1304, a wireless power receiver 1305 and a wireless power receiving antenna 1306.

The Ethernet signal including the image data of the camera 520 is transmitted to the outer wall access point 1303 through the UTP cable 1301. [ Then, the outer wall access point 1303 converts the image data into a wireless LAN (WLAN or WiFi) signal. Alternatively, the outer access point 1303 may perform a preprocessing process of amplifying the wireless LAN signal by considering the path loss in advance. Next, the outer wall access point 1303 transmits the wireless LAN signal to the outer wall antenna 1302, and the outer wall antenna 1302 emits the wireless LAN signal.

The radiated wireless LAN signal is received by the inner wall antenna 1202 and transmitted to the inner wall access point 1202. Then, the inner access point 1202 converts the wireless LAN signal back to the Ethernet signal. Optionally, the inner access point 1202 may perform a post-processing process to compensate for path loss by amplifying the converted Ethernet signal in consideration of path loss. Next, the inner wall access point 1202 transmits the Ethernet signal to the image receiver 510 via the UTP cable 1201. The image receiver 510 then extracts the image data from the Ethernet signal and outputs the extracted image data.

According to the third embodiment of the present invention, in order to drive the equipment (external wall access point 1303, camera 520) installed outside the inner wall, a power source (Power over ethernet).

First, the POE power source transmitted from the image receiver 510 to the UTP cable 1201 is branched at the inner wall access point 1203 and connected to the PD 1204. The PD 1204 then powers the inner access point 1203 and the wireless power transmitter 1205.

The wireless power transmitter 1205 converts the supplied power into a wireless power signal and provides the wireless power transmission antenna 1206 with the converted wireless power signal. Then, the wireless power transmission antenna 1206 emits a wireless power signal.

The wireless power receiving antenna 1306 then receives the wireless power signal and delivers it to the wireless power receiver 1305. [ The wireless power receiver 1305 then powers the outer wall access point 1303 to be powered. At the same time, the wireless power receiver 1305 supplies power to the PSE 1304.

PSE 1304 also provides power to the outer wall access point to power the external equipment (i.e., camera 520). Then, the outer wall access point 1303 supplies power to the camera 520 through the UTP cable and is driven. Accordingly, the camera 520 can receive power and operate. As described above, the relay device composed of a pair of the inner wall module 1200 and the outer wall module 1300 for transmitting the Ethernet signal according to the third embodiment of the present invention is connected to the POE power source Can be supplied.

As described above, according to the third embodiment of the present invention, an application to an IP camera for CCTV has been described. However, those skilled in the art will appreciate that, without departing from the spirit of the present invention, , It can be applied to various Ethernet signal transmission equipment. Although the external wall module 1300 and the external device (camera 520) connected to the external wall module 1300 have been described as being separated into the respective configurations, they may be implemented as one device.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention and the scope of the appended claims.

1: terminal 2: base station
3: building wall 100: repeater
101, 103, 105 and 107: coaxial cables
110: service antenna 120: repeater main body
130: Link module 140: Link antenna
180: inner wall antenna 190: outer wall antenna
200: inner wall module 202: inner wall antenna
203: wireless power transmitter 204: wireless power transmission antenna
300: outer wall module 302: outer wall antenna
303: Wireless power receiver 304: Wireless power receiving antenna
510: screen receiver 520: camera
1200: inner wall module 1202: inner wall antenna
1203: inner access point 1204: PD (Powered Device)
1205: wireless power transmitter 1206: wireless power transmission antenna
1300: outer wall module 1302: outer wall antenna
1303: Outer access point 1304: Power sourcing equipment (PSE)
1305: Wireless power receiver 1306: Wireless power receiving antenna

Claims (15)

In the repeater,
A service antenna for wireless connection with a terminal located inside the building and located inside the building;
A repeater body connected to the service antenna by a coaxial cable;
An inner wall antenna connected to the repeater body by a coaxial cable and installed on an inner surface of the wall of the building;
An outer wall antenna installed on an outer surface of the wall of the building in an area corresponding to an area to which the inner wall antenna is attached, and configured to wirelessly connect the inner wall antenna with the building wall therebetween; And
And a link antenna connected to the outer wall antenna by a coaxial cable and configured to wirelessly connect with the base station. The method of claim 1,
And when the forward signal from the base station is received, the link antenna, the outer wall antenna, the inner wall antenna, the repeater main body, and the service antenna sequentially relay the forward signal to the terminal. The method of claim 1,
When a reverse signal is received from the terminal,
And the service antenna, the repeater body, the inner wall antenna, the outer wall antenna, and the link antenna sequentially relay the reverse signal to the base station. The method of claim 1,
The link antenna receives a forward signal from the base station and transmits the forward signal to the outer wall antenna,
The outer wall antenna emits the forward signal,
The inner wall antenna receives the forward signal radiated, and transmits the forward signal received to the repeater body,
The repeater body amplifies the forward signal forwarded, provides an amplified forward signal to the service antenna,
And the service antenna transmits the provided forward signal to the terminal. The method of claim 1,
The service antenna receives a reverse signal from the terminal, and transmits to the repeater body,
The repeater body amplifies the reverse signal to provide an amplified reverse signal to the inner wall antenna,
The inner wall antenna radiates a provided reverse signal,
The outer wall antenna receives the radiated reverse signal and transmits the received reverse signal to the link antenna,
The link antenna transmits the transmitted reverse signal to the base station. In the repeater,
A service antenna for wireless connection with a terminal located inside the building and located inside the building;
A repeater body connected to the service antenna by a coaxial cable;
An inner wall module connected to the repeater body by a coaxial cable and installed on an inner surface of a wall of the building;
An outer wall module installed on an outer surface of the wall of the building in an area corresponding to an area in which the inner wall module is installed, and transmitting and receiving a wireless communication signal wirelessly with the inner wall module with the building wall therebetween;
A link module connected to the outer wall module by a coaxial cable; And
And a link antenna connected to the link module by a coaxial cable and configured to wirelessly connect with the base station. The method according to claim 6,
The inner wall module
An inner wall antenna for transmitting and receiving the wireless communication signal,
A wireless power transmitter converting the applied DC voltage into a wireless power signal when a DC voltage is applied from the repeater body through a coaxial cable; and
And a wireless power transmission antenna for emitting the wireless power signal. The method of claim 7, wherein
The outer wall module
An outer wall antenna for transmitting and receiving the wireless communication signal,
A wireless power receiving antenna for receiving the radiated wireless power signal, and
And a wireless power receiver converting the received wireless power signal into a DC voltage and applying the same to the link module through a coaxial cable. The method according to claim 6,
When the forward signal from the base station is received, the link antenna, the link module, the outer wall antenna of the outer wall module, the inner wall antenna of the inner wall module, the repeater main body and the service antenna sequentially relay the forward signal to the terminal. Repeater characterized in that transmitted to. The method according to claim 6,
When a reverse signal is received from the terminal,
And the service antenna, the repeater body, the inner wall antenna of the inner wall module, the outer wall antenna of the outer wall module, and the link antenna sequentially relay the reverse signal to the base station. The method according to claim 6,
When the link antenna receives a forward signal from the base station, the link antenna transmits the received forward signal to the link module.
The link module amplifies the forward signal, and transmits the amplified forward signal to the outer wall antenna of the outer wall module.
The outer wall antenna radiates the transmitted forward signal,
The inner wall antenna of the inner wall module provides the radiated forward signal to the repeater body,
The repeater body amplifies the provided forward signal, transmits the amplified forward signal to the service antenna,
The service antenna is a repeater, characterized in that for transmitting the transmitted forward signal to the terminal. The method according to claim 6,
The service antenna receives a reverse signal from the terminal, and transmits to the repeater body,
The repeater main body amplifies the reverse signal and provides it to the inner wall antenna of the inner wall module.
The inner wall antenna emits the reverse signal,
The outer wall antenna of the outer wall module receives the reverse signal and transmits the reverse signal to the link module.
The link module transmits the reverse signal to a link antenna,
And the link antenna transmits the reverse signal to the base station. A communication signal relay device comprising:
A camera located outside the building;
An outer wall module connected to the camera by an unshielded twisted pair (UTP) cable and installed on an outer surface of a wall of the building;
An inner wall module installed on an inner surface of a wall of the building in an area corresponding to an area in which the outer wall module is installed, and transmitting and receiving a wireless LAN signal wirelessly with the outer wall module with the building wall therebetween; And
And a screen receiver located inside the building and connected to the inner wall module by a UTP cable. The method of claim 13,
The outer wall module
An outer wall access point for converting the received Ethernet signal into a wireless LAN signal when receiving an Ethernet signal including screen data photographed by the camera from the camera;
An outer wall antenna for emitting the wireless LAN signal,
The inner wall module
An inner wall antenna for receiving the wireless LAN signal;
And an inner wall access point converting the received WLAN signal into an Ethernet signal and transmitting the converted WLAN signal to the screen receiver. The method of claim 13,
The inner wall access point receives power via a UTP cable from the image receiver,
The inner wall module
A power device to receive power from the inner wall access point;
A wireless power transmitter receiving power from the power device and converting the power into a wireless power signal;
And a wireless power transmission antenna for emitting the wireless power signal.
The outer wall module
A wireless power receiving antenna for receiving the wireless power signal;
A wireless power receiver configured to receive the wireless power signal from a wireless power reception antenna, supply power to the outer wall access point to drive the outer wall access point, and supply power to a PSE; And
And the PSE for supplying power to the outer wall access point such that the camera can be driven.
The outer wall access point is a communication signal relay device, characterized in that for supplying the power received from the PSE to the camera.

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