KR20120082540A - Method and apparatus for relaying signal by using frequency conversion - Google Patents

Abstract

PURPOSE: A method and apparatus for relaying signal by using frequency conversion is provided to secure service coverage about a plurality of frequency band without adding additional cable or antenna. CONSTITUTION: A first modem(210) transceives signal in a first frequency band among a frequency band of a signal which is inputted through a first antenna. A second modem(220) transceives signal in a second frequency band among a frequency band of a signal which is inputted through a second antenna. A conversion interface unit(230) converts signal in the first frequency band into a signal in the second frequency band.

Description

Signal relay apparatus and method using frequency conversion {Method And Apparatus for Relaying Signal by Using Frequency Conversion}

One embodiment of the present invention relates to a signal relay apparatus and method using frequency conversion. More specifically, using a specific frequency band by applying a signal repeater using frequency conversion to an existing infrastructure or a new infrastructure to relay a signal through a signal transmitting device into a specific building. The present invention relates to a signal relay apparatus and method using frequency conversion to secure service coverage for a plurality of frequency bands without additional cable or antennas.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

Recently, the demand for wireless data in the telecommunications market is increasing due to the launch of smartphones and tablet computers and data-driven marketing such as unlimited data subscription services. However, the biggest limitation of such wireless data activation is the capacity of the communication network that provides the actual wireless data service. This is mainly due to the limited channel capacity of the base station itself and the limitation of wireless data capacity within the coverage. That is, the maximum wireless data capacity that can be given to all users within the coverage of one base station is limited, so if more people use data, the actual transmission rate per subscriber is inevitably reduced.

The most popular solution of the alternative network to effectively distribute this is the Wireless LAN, and most of the terminals that are currently mainstream can use the WLAN. Although the wireless Internet service can be used separately from the communication network at the moment of using the WLAN, the coverage of the WLAN is absolutely inferior to that of the mobile communication network, and the new construction requires considerable time and cost, and thus an effective method is available. need.

In order to solve the above-described problem, an embodiment of the present invention, a signal relay apparatus using frequency conversion to ensure service coverage for a plurality of frequency bands without additional cable or antennas to use a specific frequency band And the main purpose of providing the method.

In order to achieve the above object, an embodiment of the present invention, a first modem for transmitting and receiving a signal of a predetermined first frequency band of the frequency band of the signal input through the first antenna; A second modem for transmitting and receiving a signal of a preset second frequency band among frequency bands of a signal input through a second antenna; And converting a signal of the first frequency band into a signal of the second frequency band and transmitting the signal to the second modem, or converting a signal of the second frequency band into a signal of the first frequency band and transmitting the signal to the first modem. It provides a signal relay device comprising a conversion interface.

In addition, according to another object of the present invention, the step of receiving a signal of a predetermined first frequency band of the frequency band of the signal input through the first antenna in the first modem; Converting and transmitting a signal of the first frequency band into a signal of a second frequency band by a conversion interface unit; Transmitting a signal of the second frequency band through a second antenna in a second modem; Receiving a signal of a preset second frequency band among frequency bands of a signal input through the second antenna in the second modem; Converting, by the conversion interface unit, a signal of the second frequency band into a signal of the first frequency band and transmitting the signal to the first modem; And transmitting a signal of a first frequency band through the first antenna in the first modem.

As described above, according to an embodiment of the present invention, a signal relay device using frequency conversion is applied to an existing infrastructure or a newly constructed infrastructure for relaying a signal through a signal transmission device to a specific building. In order to use the frequency band, it is possible to secure service coverage for a plurality of frequency bands without additional cable or antennas.

In addition, according to an embodiment of the present invention, since it is possible to provide a service of a specific frequency band by using the infrastructure of the relay apparatus pre-installed in the inbuilding system, a separate feeder line, an antenna, etc. for transmitting the frequency band is installed. It is possible to provide a frequency band that meets the data demand of the user without need, and to distribute and accommodate the demand of data traffic in the communication network.

In addition, according to an embodiment of the present invention, it is possible to improve the wireless communication environment by installing a relay device capable of serving a specific frequency band without a separate wired network within the coverage of the existing frequency band.

1 is a block diagram schematically illustrating a signal relay system using frequency conversion according to an embodiment of the present invention;
2 is a block diagram schematically illustrating a signal relay device according to an embodiment of the present invention;
3 is a block diagram schematically illustrating a conversion interface unit according to an embodiment of the present invention;
4 is a flowchart illustrating a signal relay method using frequency conversion according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

1 is a block diagram schematically illustrating a signal relay system using frequency conversion according to an embodiment of the present invention.

Signal relay system using the frequency conversion according to an embodiment of the present invention is a signal transmitting device 110, signal relay device 120, the first antenna 122, the second antenna 124 and the in-building system 130 It includes. Of course, in one embodiment of the present invention, the signal relay system using the frequency conversion is the signal transmission device 110, the signal relay device 120, the first antenna 122, the second antenna 124 and the in-building system 130 It is described as including only), which is merely illustrative of the technical idea of one embodiment of the present invention, those skilled in the art to which one embodiment of the present invention belongs to one embodiment of the present invention Various modifications and modifications to the components included in the signal relay system using frequency conversion may be applied without departing from the essential characteristics.

The signal transmitting device 110 refers to a device for transmitting a signal for voice or data communication. In addition, the signal transmission apparatus 110 performs baseband signal processing, transmission and reception of wireless signals, and the like. The signal transmission device 110 is connected to a communication network and performs a function for performing a service such as a voice communication service, a wireless data service, a wireless Internet service, a video call or a message service.

The signal relay device 120 refers to a device for amplifying a signal received from the signal transmission device 110 and transmitting the signal to the inbuilding system 130. The signal relay device 120 according to an exemplary embodiment of the present invention transmits and receives a signal of a preset first frequency band among frequency bands of a signal input through the first antenna 122 and through the second antenna 124. Transmits and receives a signal of a preset second frequency band of the frequency band of the input signal. In addition, the signal relay device 120 converts a signal of the first frequency band into a signal of the second frequency band, and converts a signal of the second frequency band into a signal of the first frequency band.

That is, the operation of the signal relay device 120 to convert the frequency band in more detail, the signal relay device 120 noise in the signal of the first frequency band input through the first antenna 122 ) Is removed, converted into a signal of the second frequency band, and a signal processing for the downlink which amplifies the signal of the second frequency band and transmits the signal to the second antenna is performed. In addition, the signal relay device 120 removes noise from the signal of the second frequency band input through the second antenna 124, converts the signal into a signal of the first frequency band, amplifies the signal of the first frequency band, and 1 performs signal processing for the uplink transmitted to the antenna 122. Here, the signal relay device 120 includes at least one module of a low noise amplifer (LNA), a frequency converter, and an amplifer to perform signal processing for downlink or uplink.

Meanwhile, the signal relay device 120 receives a signal in a frequency band of 800 MHz to 999 MHz or a signal in a frequency band of 1,900 MHz to 2,199 MHz through a first antenna 122 and amplifies the signal for the signal relay. The antenna 124 receives the signal of the frequency band of 800 MHz to 999 MHz or the signal of the frequency band of 1,900 MHz to 2,199 MHz through the second antenna 124 and then amplifies and transmits the signal to the first antenna.

Here, the signal in the frequency band of 800 MHz to 999 MHz refers to the signal in the Code Division Multiple Access (CDMA) band. More specifically, the frequency band used for the uplink of the CDMA band may be a frequency band of 824 MHz to 849 MHz, and the frequency band used for the downlink may be a frequency band of 869 MHz to 894 MHz. Of course, the frequency bands of the uplink and the downlink of the CDMA bands are not necessarily limited thereto, and may be changed according to frequency bands assigned by each communication company. On the other hand, the signal of the frequency band of 1,900 MHz to 2,199 MHz refers to the signal of the Wideband Code Division Multiple Access (WCDMA) band. More specifically, the frequency band used for the uplink of the WCDMA band may be a frequency band of 1,930 MHz to 1,960 MHz, 1,960 MHz to 1,980 MHz, and the frequency band used for the downlink is 2,120 MHz to 2,150 MHz, and 2,150 MHz to It can be a frequency band of 2,170 MHz. Of course, the frequency bands of the uplink and the downlink of the WCDMA band are not necessarily limited thereto, and may be changed according to frequency bands assigned by each communication company.

In addition, the signal relay device 120 transmits and receives a signal of the first frequency band from the signal transmission device 110 using the first antenna 122. In addition, the signal relay device 120 transmits and receives a signal of a second frequency band by using a cable installed in the inbuilding system 130 and the second antenna 124. Here, the signal of the first frequency band is a signal having a frequency band of 2,300 MHz to 2,399 MHz, and refers to a Wibro signal. Here, WiBro is a wireless broadband Internet technology. On the other hand, WiBro is the name for the international standard IEEE 802.16e and is also called Mobile WiMAX. Meanwhile, the second frequency band signal is a signal having a frequency band of 2,400 MHz to 2,499 MHz, and refers to a Wi-Fi signal among WLAN signals. Here, Wi-Fi refers to a series of technologies that support IEEE 802.11-based wireless LAN connection, device-to-device connection (Wi-Fi P2P), and PAN / LAN / WAN configuration. That is, since Wi-Fi is supported by many operating systems and terminals, mobile phones, PDAs, desktops, notebook computers, netbooks, game consoles, printers, and some peripheral devices such as printers perform Wi-Fi communication. That is, within the coverage where the Wi-Fi signal is transmitted through the second antenna 124 as in the present invention, data communication may be used within a predetermined distance with respect to the second antenna 124. That is, the Wi-Fi signal is transmitted to the inside of the building through the second antenna 124. Since the Wi-Fi is a method using a radio frequency, no telephone line or a dedicated line is required, and if the user-owned terminal is provided with a wireless LAN module, the second The antenna 124 may perform communication based on 802.11.

Hereinafter, an example of converting a signal (WiBro signal) of a first frequency band (WiBro signal), which is considered to be required to be applied to the signal relay device 120 according to an embodiment of the present invention, into a signal (Wi-Fi signal) of a second frequency band, will be described. Explain. For example, the signal relay device 120 may serve as a bridge that converts a WiBro signal (first frequency band) into a Wi-Fi signal (second frequency band). The signal relay device 120 receives the WiBro signal (first frequency band) within the coverage of the signal transmission device 110 that supports WiBro (first frequency band) and then the Wi-Fi signal inside the signal relay device 120. Converts to a (second frequency band) to provide a Wi-Fi signal (second frequency band) inside the inbuilding system 130, and conversely receives a signal generated from a terminal supporting Wi-Fi (second frequency band) After converting to the (first frequency band), the signal transmission apparatus 110 may transmit the signal to the Internet network from the signal transmission apparatus 110 to enable wireless communication. Of course, the external WiBro signal (first frequency band) is sufficiently good to reach the area where the signal relay device 120 is installed. To this end, when the donor / service antenna is externally installed on the signal relay 120 and the feeder line is installed, the service can be expanded, but the cost is excessive, so it is not preferable to apply the above scheme. In addition, even if the WiBro signal (first frequency band) is sufficiently good to enter the area where the signal relay device 120 is installed, and it is difficult to secure desired coverage, the additional Wi-Fi (second frequency band) equipment may be partially installed. Wi-Fi (second frequency band) service may be provided in the section.

On the other hand, to explain an example to be applied to another embodiment of the present invention, since the signal relay device 120 is installed and operated inside the building is not easy to visit the site for inspection or management, monitoring, management, remote control Additional functionality is needed. In addition, the signal relay device 120 may integrally manage the wireless signal repeater function and the bridge function by using the first modem 210 and the second modem 220, which are essentially required. The signal relay device 120 may be separately managed by the upper monitoring server. In addition, when the signal relay device 120 is installed in a new building, the second antenna 124, which is a service antenna, should be placed around the place where the subscriber is mainly concentrated to maintain the best service quality through the signal of the second frequency band. In addition, when the signal relay device 120 is installed in place of the existing repeater, the existing feeder infrastructure may be utilized as it is, and only the donor / service antenna may be replaced if necessary so that the signal of the second frequency band is simply added to the existing repeater coverage. Make it possible to send.

In addition, the signal relay device 120 is not only a signal in the frequency band of 800 MHz to 999 MHz, a signal in the frequency band of 1,900 MHz and 2,199 MHz, but also a signal in the frequency band (first frequency band) of 2,300 MHz and 2,399 MHz. Preferably, the first antenna 122 is installed and directed at the secured position. In addition, in the current communication network, signals in the frequency band (first frequency band) of 2,300 MHz to 2,399 MHz and signals in the frequency band (second frequency band) of 2,400 MHz to 2,499 MHz are about 90% or more co-located. Although the service is possible regardless of the installation or directing direction of the first antenna 122, in some wireless environments, the input range of the wide first frequency band may be set to smoothly provide the service of the second frequency band. It is desirable to have.

The first antenna 122 is a donor antenna that is in communication with the signal transmission apparatus 110 and is located outdoors to transmit and receive a signal with the signal transmission apparatus 110. In this case, a cable (feed line) is connected from the signal relay device 120 located indoors to the first antenna 122 located outdoors. For example, the first antenna 122 receives signals in the frequency band of 2,300 MHz to 2,399 MHz in addition to the frequency band of 800 MHz to 999 MHz (CDMA band), and the frequency band of 1,900 MHz to 2,199 MHz (WCDMA band). It is desirable to apply a triple band antenna to transmit and receive.

The second antenna 124 is an antenna installed inside a specific building, and may be a directional antenna installed to transmit a signal received from the outside to a shaded area inside the building. For example, the second antenna 124 receives signals in the frequency band of 2,400 MHz to 2,499 MHz in addition to the frequency band of 800 MHz to 999 MHz (CDMA band), and the frequency band of 1,900 MHz to 2,199 MHz (WCDMA band). It is desirable to apply a triple band antenna to transmit and receive.

The inbuilding system 130 is an in-building communication system built to accommodate subscribers in a shadowed area or a hearing loss area in a specific building. The inbuilding system 130 transmits a signal received from a wireless repeater in a building through a coaxial cable or an optical line. By transmitting to any place, improve the wireless environment, such as expanding the serviceable area. In other words, the in-building system 130, in order to supplement the wireless environment of the wired / wireless communication network in the building or the building, the cable (feeder) and the antenna shades the building so that the good signal received from the outside can be serviced in the building. Includes infrastructure deployed locally.

2 is a block diagram schematically illustrating a signal relay device according to an embodiment of the present invention.

The signal relay device 120 according to an embodiment of the present invention includes a first modem 210, a second modem 220, a conversion interface unit 230, and a signal relay unit 240. Of course, in the exemplary embodiment of the present invention, the signal relay device 120 includes only the first modem 210, the second modem 220, the conversion interface unit 230, and the signal relay unit 240. This is merely illustrative of the technical idea of an embodiment of the present invention, and those skilled in the art to which an embodiment of the present invention belongs should receive the signal without departing from the essential characteristics of the embodiment of the present invention. Various modifications and variations to the components included in the relay device 120 may be applicable.

The first modem 210 and the second modem 220 refer to a data communication device that performs communication through modulation and demodulation. The first modem 210 transmits and receives a signal of a preset first frequency band among frequency bands of a signal input through the first antenna 122. Here, the signal of the first frequency band has a frequency band of 2,300 MHz to 2,399 MHz. The first modem 210 transmits and receives a signal of a first frequency band from the signal transmitting device 110. That is, the first modem 210 transmits and receives a signal having a frequency band of 2,300 MHz to 2,399 MHz with the signal transmitting apparatus 110.

The second modem 220 transmits and receives a signal of a preset second frequency band among frequency bands of a signal input through the second antenna 124. Here, the signal of the second frequency band has a frequency band of 2,400 MHz to 2,499 MHz. For example, the second modem 220 may transmit and receive a signal of a second frequency band with a terminal located in a specific building by using the second antenna 124. In this case, the second modem 220 transmits and receives a signal of a second frequency band through a cable and an antenna installed in the in-building system 130 that cooperates. That is, the second modem 220 transmits and receives a signal having a frequency band of 2,400 MHz to 2,499 MHz with a terminal located in a specific building.

The conversion interface 230 converts the signal of the first frequency band into a signal of the second frequency band and transmits the signal to the second modem, or converts the signal of the second frequency band into a signal of the first frequency band and converts the signal to the first modem 210. ). The conversion interface 230 removes the noise from the signal of the first frequency band input through the first modem 210, converts the signal into a signal of the second frequency band, amplifies the signal of the second frequency band, and a second antenna. Signal processing for the downlink sent to 124 is performed. The conversion interface 230 removes noise from the signal of the second frequency band input through the second modem 220, converts the signal into a signal of the first frequency band, amplifies the signal of the first frequency band, and then first antenna. Signal processing for uplink sent to 122 is performed.

The signal relay 240 receives a signal of a frequency band of 800 MHz to 999 MHz or a signal of a frequency band of 1,900 MHz to 2,199 MHz through the first antenna 122, amplifies it, and transmits the signal to the second antenna 124. Alternatively, the signal of the frequency band of 800 MHz to 999 MHz or the signal of the frequency band of 1,900 MHz to 2,199 MHz is received through the second antenna 124 and then amplified and transmitted to the first antenna 122.

3 is a block diagram schematically illustrating a conversion interface unit according to an embodiment of the present invention.

The conversion interface unit 230 according to an embodiment of the present invention includes a downlink unit 310 and an uplink unit 320. Of course, in one embodiment of the present invention, the conversion interface 230 is described as including only the downlink portion 310 and uplink portion 320, which is illustrative of the technical spirit of an embodiment of the present invention As just described, those skilled in the art to which an embodiment of the present invention belongs will have a variety of components included in the conversion interface unit 230 without departing from the essential characteristics of the embodiment of the present invention. Modifications and variations will be applicable.

The downlink unit 310 includes a downlink LNA 312, a downlink frequency converter 314, and a downlink amplifier 316. That is, the downlink unit 310 removes the noise from the signal of the first frequency band input through the first modem 210, converts the signal into a signal of the second frequency band, and amplifies the signal of the second frequency band. Signal processing for downlink transmitted to two antennas is performed.

The downlink LNA 312 removes noise (noise component) from the signal of the first frequency band received from the signal transmitting apparatus 110 and transmits the noise to the downlink frequency converter 314. The downlink frequency converter 314 converts the signal of the first frequency band from which the noise is removed to the signal of the second frequency band. That is, the downlink frequency converter 314 converts a signal having a frequency band of 2,300 MHz to 2,399 MHz into a signal having a frequency band of 2,400 MHz to 2,499 MHz. The downlink amplifier 316 amplifies the signal of the second frequency band received from the downlink frequency converter 314 to radiate the corresponding signal through the second antenna 124.

The uplink unit 320 includes an uplink LNA 322, an uplink frequency converter 324, and an uplink amplifier 326. The uplink unit 320 removes noise from the signal of the second frequency band input through the second modem 220, converts the signal into a signal of the first frequency band, amplifies the signal of the first frequency band, and then first antenna. Signal processing for uplink sent to 122 is performed.

The uplink LNA 322 removes noise (noise component) from the signal of the second frequency band received from the second modem 220 and transmits the noise to the uplink frequency converter 324. The uplink frequency converter 324 converts the signal of the second frequency band from which the noise is removed to the signal of the first frequency band. That is, the uplink frequency converter 324 converts a signal having a frequency band of 2,400 MHz to 2,499 MHz into a signal having a frequency band of 2,300 MHz to 2,399 MHz. The uplink amplifier 326 amplifies a signal of the first frequency band received from the uplink frequency converter 324 to radiate the corresponding signal through the first antenna 122.

4 is a flowchart illustrating a signal relay method using frequency conversion according to an embodiment of the present invention.

The signal relay device 120 receives a signal of a preset first frequency band among frequency bands of a signal input through the first antenna 122 (S410). The signal relay device 120 receives a signal of a first frequency band from the signal transmission device 110 using the first antenna 122. That is, the signal relay device 120 receives a signal (WiBro signal) of the first frequency band having a frequency band of 2,300 MHz to 2,399 MHz from the signal transmitting device 110.

The signal relay device 120 converts a signal of the first frequency band into a signal of the second frequency band (S420). Referring to the operation of the signal relay device 120 converts the first frequency band to the second frequency band in detail, the signal relay device 120 is a signal of the first frequency band input through the first antenna 122 After the noise is removed, the signal is converted into a signal of the second frequency band, and the signal of the second frequency band is amplified. Here, the signal relay device 120 may include at least one module of an LNA, a frequency converter, and an amplifier to perform signal processing for the downlink.

The signal relay device 120 amplifies the signal of the second frequency band and transmits it through the second antenna 124 (S430). That is, the signal relay device 120 transmits the signal of the second frequency band by using the cable and the second antenna 124 installed in the inbuilding system 130. The signal of the second frequency band is a signal having a frequency band of 2,400 MHz to 2,499 MHz, and refers to a Wi-Fi signal among WLAN signals. That is, since many terminals possessed by subscribers located in a specific building support such Wi-Fi, the subscribers may receive Wi-Fi communication by receiving a signal of the second frequency band converted through the signal relay device 120. . That is, since a mobile phone, a PDA, a desktop, a notebook computer, a netbook, a game machine, a printer, and some peripheral devices, such as a smartphone, can communicate via Wi-Fi, the terminal capable of Wi-Fi communication uses the second antenna 124. Within the coverage through which the Wi-Fi signal is transmitted, data communication can be performed using Wi-Fi within a predetermined distance with respect to the second antenna 124.

Conversely, if a terminal of a subscriber located inside a specific building performs Wi-Fi communication through the signal relay device 120 and wishes to transmit a Wi-Fi signal, the terminal transmits a signal of a second frequency band to the signal relay device 120. do. The signal relay device 120 receives the signal of the second frequency band through the second antenna 124 (S440), and converts the received signal of the second frequency band into the signal of the first frequency band (S450). The operation of the signal relay device 120 to convert the second frequency band to the first frequency band will be described in detail. When the signal relay device 120 receives the signal of the second frequency band input through the second antenna 124 After the noise is removed, the signal is converted into a signal of the first frequency band and the signal of the first frequency band is amplified. Here, the signal relay device 120 may include at least one module of an LNA, a frequency converter, and an amplifier to perform signal processing for the uplink.

The signal relay device 120 amplifies the signal of the first frequency band and transmits it through the first antenna 122 (S460). That is, since the signal transmitting device 110 supports the first frequency band, the signal relay device 120 uses the signal of the first frequency band to transmit the signal of the first frequency band 122 in order to communicate with the signal transmitting device 110. Through the signal transmission device 110 through. The signal of the first frequency band is a WiBro signal having a frequency band of 2,300 MHz to 2,399 MHz, and subscribers located in a specific building communicate through a signal relay device 120 with a signal having a frequency band of 2,400 MHz to 2,499 MHz. In practice, however, subscribers perform communication with signals received from the signal transmitting apparatus 110 having a frequency band of 2,300 MHz to 2,399 MHz.

In FIG. 4, steps S410 to S460 are described as being sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention, and the general knowledge in the technical field to which an embodiment of the present invention belongs. Those having a variety of modifications and variations may be applicable by changing the order described in FIG. 4 or executing one or more steps of steps S410 to S460 in parallel without departing from the essential characteristics of an embodiment of the present invention. 4 is not limited to the time series order. As described above, the signal relay method using frequency conversion according to an embodiment of the present invention described in FIG. 4 may be implemented in a program and recorded in a computer-readable recording medium.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, the present invention is applied to various fields capable of securing service coverage for a plurality of frequency bands without additional cables or antennas to use a specific frequency band, thereby meeting a user's data demand. It is a useful invention that can provide an effect, and generates an effect that can accommodate the data traffic demand in the communication network distributed.

110: signal transmission device 120: signal relay device
122: first antenna 124: second antenna
130: inbuilding system 210: first modem
220: second modem 230: conversion interface unit
240: signal relay 310: downlink
320: uplink portion

Claims (12)

A first modem for transmitting and receiving a signal of a preset first frequency band among frequency bands of a signal input through a first antenna;
A second modem for transmitting and receiving a signal of a preset second frequency band among frequency bands of a signal input through a second antenna; And
Converting a signal of the first frequency band into a signal of the second frequency band and transmitting the signal to the second modem or converting a signal of the second frequency band into a signal of the first frequency band and transmitting the signal to the first modem Transformation interface
Signal relay device comprising a. The method of claim 1,
The conversion interface unit,
After removing noise from the signal of the first frequency band input through the first modem, the signal is converted into a signal of the second frequency band, and amplified by the signal of the second frequency band and transmitted to the second antenna. A downlink unit; And
An uplink that removes noise from the signal of the second frequency band input through the second modem, converts the signal into the signal of the first frequency band, amplifies the signal of the first frequency band, and transmits the signal to the first antenna part
Signal relay device comprising a. The method of claim 2,
The downlink portion or the uplink portion,
A signal relay device comprising at least one module of a low noise amplifier (LNA), a frequency converter, and an amplifier. The method of claim 1,
After receiving the signal of the frequency band of 800 MHz to 999 MHz or the signal of the frequency band of 1,900 MHz to 2,199 MHz through the first antenna and amplified and sent to the second antenna
The signal relay unit which receives the signal of the frequency band of 800 MHz to 999 MHz or the signal of the frequency band of 1,900 MHz to 2,199 MHz through the second antenna and then amplifies and transmits the signal to the first antenna
Signal relay device, characterized in that it further comprises. The method of claim 1,
And the first modem transmits and receives a signal of the first frequency band from a signal transmitting device. The method of claim 1,
And the second modem transmits and receives a signal of the second frequency band through a cable and an antenna installed in an interworking in-building system. The method of claim 1,
The signal of the first frequency band,
A signal relay device having a frequency band of 2,300 MHz to 2,399 MHz. The method of claim 1,
The signal of the second frequency band,
And a frequency band of 2,400 MHz to 2,499 MHz. Receiving a signal of a preset first frequency band among frequency bands of a signal input through a first antenna in a first modem;
Converting and transmitting a signal of the first frequency band into a signal of a second frequency band by a conversion interface unit;
Transmitting a signal of the second frequency band through a second antenna in a second modem;
Receiving a signal of a preset second frequency band among frequency bands of a signal input through the second antenna in the second modem;
Converting, by the conversion interface unit, a signal of the second frequency band into a signal of the first frequency band and transmitting the signal to the first modem; And
Transmitting a signal of a first frequency band through the first antenna in the first modem
Signal relay method comprising a. The method of claim 9,
Converting and transmitting the signal of the first frequency band to the signal of the second frequency band,
Removing noise from the signal of the first frequency band input through the first modem, converting the signal to the signal of the second frequency band, amplifying the signal of the second frequency band, and transmitting the signal to the second antenna; Signal relay method comprising a. The method of claim 9,
Converting the signal of the second frequency band into a signal of the first frequency band and transmitting the signal to the first modem;
Removing noise from the signal of the second frequency band inputted through the second modem, converting the signal to the signal of the first frequency band, amplifying the signal of the first frequency band, and transmitting the signal to the first antenna; Signal relay method comprising a. The method of claim 9,
The signal of the first frequency band has a frequency band of 2,300 MHz to 2,399 MHz, and the signal of the second frequency band has a frequency band of 2,400 MHz to 2,499 MHz.

Images