KR20120079960A - Method for providing femto cell service, apparatus and system therefor - Google Patents

Abstract

PURPOSE: A device and a system for providing a femto cell service are provided to configure a backhaul of the femto cell from an outdoor type relay equipment. CONSTITUTION: A signal sharing unit(120) receives a plurality of frequency bands from a signal transmission unit(110). The signal sharing unit transmits combination signal which combines the signals of a plurality of bands. A signal separation unit(130) transmits divided signal which is divided from a set specific frequency band among the combined signal. A femto cell unit(150) performs the amplification and transmission for the divided signal.

Description

Method for providing femtocell service and apparatus and system therefor {Method for Providing Femto Cell Service, Apparatus And System Therefor}

One embodiment of the present invention relates to a femtocell service providing method, apparatus and system therefor. More specifically, in order to provide femtocell service efficiently by using the infrastructure of the signal relay unit and the outdoor relay unit together (or alone) in the communication network, the outdoor relay unit using the line for the signal relay unit Method of providing a femtocell service to enable femtocell service by wired or wireless extension without constructing a separate infrastructure by establishing a backhaul of the femtocell through wired or wireless lines from the outdoor relay device, and an apparatus therefor and It is about the system.

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 the wireless Internet is increasing due to the appearance of smart phones and the announcement of data plans by telecommunication companies. As a result, carriers are building new frequency band networks to cover areas with a larger population, in addition to the network of frequency bands being serviced to accommodate additional data capacity and ensure faster data rates.

However, infrastructure for servicing a frequency band corresponding to an alternative network for effectively distributing data traffic is absolutely insufficient compared to a mobile communication network. That is, the biggest limitation of such wireless data activation is the capacity of the network that provides the actual wireless data service, which is mainly due to the limited channel capacity of the signal transmission device itself and the limitation of wireless capacity within the coverage. More specifically, since the maximum capacity that can be allocated to all users within the coverage of one signal transmission device is limited, the actual transmission rate per subscriber is further reduced when more users use data.

To solve this problem, separate channel resources are allocated within a smaller coverage area by using separate small cell devices such as micro cells, pico cells, femtocells, and the like. To increase the traffic capacity of the entire network level has been applied. In particular, femtocells are in the spotlight as solutions that can provide services by allocating separate channel capacity to small areas such as in-building while being within macro base station coverage. However, in order to activate them, wired backhaul is necessary. . However, it is difficult to establish a wired network in a small building, a shopping mall, a home, and a femtocell-installed area.

In order to solve the above problems, an embodiment of the present invention provides a femtocell service for building a femtocell by providing a backhaul wirelessly using an infrastructure or an outdoor relay device of a communication network in various installation environments in which wired networks are difficult to establish. The main object is to provide a method and apparatus and system therefor.

In order to achieve the above object, an embodiment of the present invention, a signal sharing device for receiving a signal of a plurality of frequency bands from a signal transmission device, and transmits a combined signal combining the signals of the plurality of frequency bands; A signal separation device for transmitting a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing device; And a femtocell device which amplifies the separated signal and transmits the separated signal into coverage.

In addition, according to another object of the present invention, a signal sharing module for receiving a signal of a plurality of frequency bands from a signal transmitting device, and transmits a combined signal combining the signals of the plurality of frequency bands; A signal separation module configured to transmit a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing device; A signal relay module receiving the separation signal and relaying the separation signal to the femtocell device; And a femtocell module for amplifying the separated signal and transmitting the amplified signal into coverage.

According to another object of the present invention, there is provided a signal sharing apparatus, comprising: receiving a signal of a plurality of frequency bands from a signal transmitting apparatus and transmitting a combined signal combining the signals of the plurality of frequency bands; Transmitting, by a signal separation device, a separation signal obtained by separating only a signal of a predetermined specific frequency band among the combined signals received from the signal sharing device; And a femtocell device provides a femtocell service method comprising the step of amplifying the separated signal sent to the coverage.

As described above, according to an embodiment of the present invention, a signal relay device for efficiently providing a femto cell service by using (or alone) an infrastructure of a signal relay device and an outdoor relay device in a communication network. Opening the outdoor relay device using the service line and configuring the backhaul of the femtocell through the wired or wireless line from the outdoor relay device so that femtocell service can be provided by wire / wireless expansion without building a separate infrastructure. There is.

In addition, according to an embodiment of the present invention, by using the infrastructure and the outdoor relay device of the signal relay device or by using the general wired infrastructure and the outdoor relay device, high-speed data communication is possible without installing a wired infrastructure for building a separate femtocell In addition to providing the service to meet the user's data needs, it is also effective to distribute the demand for data traffic (Data Traffic) in the communication network.

In addition, according to an embodiment of the present invention, since femtocell service is possible without establishing a wired infrastructure, there is an effect of reducing not only the wired infrastructure construction cost but also the wired infrastructure maintenance cost.

1 is a block diagram schematically showing a femtocell service providing system according to an embodiment of the present invention;
2 is a block diagram schematically showing a first femtocell AP according to an embodiment of the present invention;
3 is a block diagram schematically illustrating a femtocell service apparatus according to an embodiment of the present invention;
4 is a flowchart illustrating a femtocell service providing method according to an embodiment of the present invention;
5 is an exemplary diagram for explaining a case in which a femtocell AP and a femtocell device communicate by wire according to an embodiment of the present invention;
6 is an exemplary diagram for explaining a case in which a femtocell AP and a femtocell device communicate wirelessly according to an embodiment of the present invention;
7 is an exemplary diagram for explaining a case in which a femtocell AP is installed outdoors according to an embodiment of the present invention and a femtocell device communicates wirelessly.

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 femtocell service providing system according to an embodiment of the present invention.

The femtocell service providing system according to an embodiment of the present invention includes a signal transmission device 110, a signal sharing device 120, a signal separation device 130, a femtocell AP 140, a femtocell device 150, and a signal relay device ( 160 and the in-building relay device 170. Meanwhile, in an embodiment of the present invention, the femtocell service providing system includes a signal transmission device 110, a signal sharing device 120, a signal separation device 130, a femtocell AP 140, a femtocell device 150, and a signal relay device. Although described as including only the 160 and the in-building relay device 170, which is merely illustrative of the technical idea of one embodiment of the present invention, the general knowledge in the art to which one embodiment of the present invention belongs Those having the above will be applicable to various modifications and modifications to the components included in the femtocell service providing system without departing from the essential characteristics of the embodiment of the present invention.

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.

In one embodiment of the present invention, the signal transmitting apparatus 110 includes a first signal transmitting apparatus 112 and a second signal transmitting apparatus 114. More specifically, the first signal transmitter 112 is a device for transmitting a signal of the first frequency band and a signal of the second frequency band, and the second signal transmitter 114 is a device of the third frequency band. Refers to a device that sends out a signal. Here, the signal of the first frequency band may be a code division multiple access (CDMA) signal and may have a frequency band of 800 MHz to 999 MHz, and the second frequency band is a wideband code division multiple access (WCDMA) signal. It may have a frequency band of 1,900 MHz to 2,199 MHz, and the signal of the third frequency band may have a frequency band of 2,400 MHz to 2,499 MHz as a Wi-Fi (Wireless-Fidelity) signal. Here, the frequency band allocated to CDMA, WCDMA, and Wi-Fi may be changed by national policy or setting of each telecommunication company.

To be more specific with respect to the signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band, the signal of the first frequency band is 824 MHz to 894 MHz of 800 MHz to 999 MHz for CDMA communication. The frequency band of can be used, the frequency band used for the uplink of the CDMA band may be a frequency band of 824 MHz to 849 MHz, the frequency band used for the downlink is a frequency band of 869 MHz to 894 MHz Can be used. In addition, the signal of the second frequency band may use a frequency band of 1,930 MHz to 2,150 MHz of 1,900 MHz to 2,199 MHz for WCDMA communication, and the frequency band used for uplink among the WCDMA bands is 1,930 MHz to 1,960 MHz, 1,960. Frequency bands of MHz to 1,980 MHz may be used, and frequency bands used for the downlink may use frequency bands of 2,120 MHz to 2,150 MHz and 2,150 MHz to 2,170 MHz. In addition, the signal of the third frequency band may use a frequency band of 2,400 MHz to 2,499 MHz for Wi-Fi communication. 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. In other words, 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. do.

The signal sharing device 120 receives signals of a plurality of frequency bands from the signal transmitting device 110, and transmits a combined signal combining the signals of the plurality of frequency bands to the signal separation device 130. In more detail with respect to the operation of the signal sharing device 120, the signal sharing device 120 receives a signal of the first frequency band and a signal of the second frequency band from the first signal transmitting device 112, A combination of receiving a signal of a third frequency band from the two signal transmitting device 114, and receiving and combining at least one signal of the received signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band. Send a signal. That is, the signal sharing device 120 is a device capable of combining and outputting signals of a plurality of frequency bands received from the signal transmitters 110.

The signal separation device 130 transmits a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing device 120 to the femtocell AP 140 or the femtocell device 150. At this time, the signal transmission device 110, the signal sharing device 120 and the signal separation device 130 transmits and receives a signal between each device using the optical path. In more detail, the operation of the signal separation device 130 may be performed by combining the signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band from the signal sharing device 120. A femtocell AP receives a combined signal and separates a separated signal obtained by separating a signal of a third frequency band (or a signal of a second frequency band, a signal of a second frequency band + a signal of a second frequency band), which is a predetermined frequency band. 140 or the femtocell device 150 may be transmitted.

The femtocell AP 140 is a device for connecting data communication. The femtocell AP 140 refers to a device capable of reading a receiving side address from a transmitting side information, designating a communication path, and transmitting the same to another communication device (or a communication network). For example, the first femtocell AP 142 extracts the location of the data packet, designates the second femtocell AP 144 as the best communication path for the extracted location, and sends the data packet along the designated communication path to the next device. The second femtocell AP 144 may be redirected. In addition, the second femtocell AP 144 reversely extracts the location of the data packet, designates the first femtocell AP 142 as the best communication path to the extracted location, and sends the data packet along the designated communication path to the next device. It may be redirected to the first femtocell AP 142. Meanwhile, in the present embodiment, the femtocell AP 140 may be understood as a concept including a router, a repeater, a repeater, and a bridge.

The femtocell AP 140 receives the separation signal from the signal separation device 130 and relays the separation signal to the femtocell device 150. The femtocell AP 140 in one embodiment of the present invention includes a first femtocell AP 142 and a second femtocell AP 144. Operation of the first femtocell AP 142 and the second femtocell AP 144 will now be described in detail. The first femtocell AP 142 transmits a converted signal obtained by converting the separated signal received from the signal separation device 130 into a preset frequency band, and the second femtocell AP 144 receives from the first femtocell AP 142. The converted signal is converted back into a separate signal and transmitted to the femtocell device 150. In this case, the first femtocell AP 142 and the second femtocell AP 144 may transmit and receive signals to each other by wire or wirelessly. In addition, the first femtocell AP 142 may transmit a converted signal obtained by converting the separated signal into a frequency band of 5,000 MHz to 5,999 MHz, which is a preset frequency band. That is, the preset frequency band is a signal having a frequency band of 5,000 MHz to 5,999 MHz, but the signal of this frequency band is not necessarily limited.

On the other hand, if the femtocell service providing system does not transmit the separation signal to the surrounding buildings, but wants to service the separation signal only to a specific location of the building, without using the femtocell AP 140, the signal separation device 130 in the femtocell The separation signal may be sent directly to the device 150. In addition, the signal separation device 130 and the first femtocell AP 142 preferably transmits and receives a signal using a wired cable, and the second femtocell AP 144 and the femtocell device 150 also use a wired signal. It is preferable to transmit and receive. Here, the wired cable may be an Unshielded Twisted Pair (UTP) cable, but is not necessarily limited thereto.

The femtocell device 150 receives the separation signal from the signal separation device 130 or the femtocell AP 140, amplifies the separation signal, and transmits the separation signal into the set femtocell coverage. To describe in detail the femtocell device 150, the femtocell device 150 is installed in the building to set the femtocell coverage, and refers to a device for providing a communication service in a predetermined specific frequency band. That is, the femtocell device 150 may be located in a premises (in the building) set to femtocell coverage on the outer wall of a building and request a location registration, thereby communicating with a terminal receiving a communication service from the femtocell device 150 accordingly. Can be done. For reference, femtocells have an output set to several tens of mW, have a coverage of 10 to 20 m, and are formed inside buildings such as homes or indoors, and transmit capacity of several Mbps per subscriber to a small number of users (about 1 to 4). Provides a communication service having.

The femtocell device 150 sets up a home (in-building) as femtocell coverage for a few subscribers, and provides a communication service provided from a communication provider and a separate contents provider (CP) through the femtocell AP 140. To provide the terminal according to the femtocell coverage. That is, the femtocell device 150 is connected to a communication access network and a core network of a telecommunication service provider through the femtocell AP 140, and performs call processing such as voice call reception, message transmission and reception, etc. to a mobile terminal within femtocell coverage. Perform data transmission and reception. In addition, the femtocell device 150 may include a short range communication module for receiving a positioning signal transmitted from a terminal located within femtocell coverage.

That is, the femtocell device 150 sets the home (in the building) to femtocell coverage for a few subscribers as described above, and provides a communication service provided through the femtocell AP 140 to a terminal entering femtocell coverage. Apart from the conventional signal transmission apparatus 110, communication with the terminal through short-range communication may be performed. Here, the short-range communication is preferably Wi-Fi, but is not necessarily limited thereto, and various short-range communication means such as ZigBee, Bluetooth, or the like may be used. Accordingly, the terminal interworking with the femtocell device 150 is preferably a terminal having a short-range communication module that supports short-range communication serving the femtocell device 150. That is, the terminal may interwork with the femtocell device 150 using a short range communication module or may receive a communication service through a frequency band serviced by the femtocell device 150.

The signal relay device 160 refers to a device for amplifying a signal received from the signal transmission device 110 and transmitting the signal to the in-building relay device 170. The signal relay device 160 according to an embodiment of the present invention amplifies the remaining signals that are signals of the remaining frequency bands not separated by the signal separation device 130 among the signals received from the signal sharing device 120. The building relay device 170 transmits.

The inbuilding relay device 170 is an in-building communication system built to accommodate a subscriber in a shadowed area or a hearing loss area in a specific building, and is received from the signal separation device 130 (or a wireless relay device). By transmitting the signal to any place in the building through coaxial cable or optical path, it improves the wireless environment such as expanding the serviceable area. In other words, the in-building relay device 170 is a cable (feeder) and an antenna to provide a good signal received from the outside in the building to supplement the wireless environment of the wired or wireless communication network inside the building or building. Includes infrastructure environments that are shaded. The in-building relay device 170 receives the remaining signals, which are signals of the remaining frequency bands not separated by the signal separation device 130 from the signal relay device 160, and transmits the remaining signals. The inbuilding relay device 170 transmits the remaining signals through the cable distributed to each layer in the inbuilding, and an antenna for transmitting and receiving signals with the cable.

2 is a block diagram schematically illustrating a first femtocell AP according to an embodiment of the present invention.

The first femtocell AP 142 according to an embodiment of the present invention includes a downlink unit 210 and an uplink unit 220. Meanwhile, in an embodiment of the present invention, the first femtocell AP 142 is described as including only the downlink unit 210 and the uplink unit 220, but this is illustrative of the technical spirit of an embodiment of the present invention. As just described, those of ordinary skill in the art to which an embodiment of the present invention belongs will be provided with respect to the components included in the first femtocell AP 142 without departing from the essential characteristics of the embodiment of the present invention. Various modifications and variations will be applicable.

The downlink unit 210 includes a downlink LNA 212, a downlink frequency converter 214, and a downlink amplifier 216. That is, the downlink unit 210 removes noise from the separated signal input through the signal separation device 130 and then amplifies the converted converted signal, which is a signal of a predetermined frequency band, and transmits the converted signal to the second femtocell AP 144. Signal processing for the downlink is performed. The downlink LNA 212 removes noise (noise component) from the separated signal received from the signal separation device 130 and transmits the noise to the downlink frequency converter 214. The downlink frequency converter 214 generates a converted signal by converting the separated signal from which the noise is removed into a signal of a predetermined frequency band. That is, the downlink frequency converter 214 converts a separated signal (a signal of the third frequency band), which is a signal separated by the signal separation device 130, into a signal having a frequency band of 5,000 MHz to 5,999 MHz. The downlink amplifier 216 amplifies and converts the converted signal received from the downlink frequency converter 214 to the second femtocell AP 144.

The uplink unit 220 includes an uplink LNA 222, an uplink frequency converter 224, and an uplink amplifier 226. The uplink unit 220 removes noise from the converted signal input through the second femtocell AP 144 and converts it back to the converted signal having a predetermined frequency band, amplifies the separated signal, and transmits the separated signal to the signal separation device 130. Signal processing for uplink is performed. The uplink LNA 222 removes noise (noise component) from the converted signal received from the second femtocell AP 144 and transmits the noise to the uplink frequency converter 224. The uplink frequency converter 224 generates a separated signal obtained by converting a converted signal from which noise is removed to a preset frequency band. That is, the uplink frequency converter 224 converts a signal having a frequency band of 5,000 MHz to 5,999 MHz into a signal of a third frequency band which is a frequency band used in the separated signal. The uplink amplifier 226 amplifies the separated signal received from the uplink frequency converter 224 and transmits it to the signal separation device 130.

Here, the detailed description of the second femtocell AP 144 will be omitted, but if the person skilled in the art, the second femtocell AP 144 operates in the reverse order with the first femtocell AP 142. You will know.

3 is a block diagram schematically illustrating a femtocell service apparatus according to an embodiment of the present invention.

The femtocell service apparatus according to an embodiment of the present invention includes a signal sharing module 310, a signal separation module 320, a signal relay module 330, and a femtocell module 340. Meanwhile, in one embodiment of the present invention, the femtocell service apparatus includes only the signal sharing module 310, the signal separation module 320, the signal relay module 330, and the femtocell module 340. As merely illustrative of the technical spirit of the embodiment of the present invention, those skilled in the art to which an embodiment of the present invention belongs to the femtocell service apparatus within the scope without departing from the essential characteristics of one embodiment of the present invention Various modifications and variations to the components to be applied will be applicable.

That is, the femtocell service device shown in FIG. 3 is a signal sharing device 120, the signal separation device 130, the femtocell AP 140 and the femtocell device 150 shown in FIG. Concept.

The signal sharing module 310 receives a signal of a plurality of frequency bands from the signal transmitting device 110 and transmits a combined signal combining the signals of the plurality of frequency bands to the signal separation device 130. In more detail with respect to the operation of the signal sharing module 310, the signal sharing module 310 receives a signal of the first frequency band and a signal of the second frequency band from the first signal transmitting device 112, A combination of receiving a signal of a third frequency band from the two signal transmitting device 114, and receiving and combining at least one signal of the received signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band. Send a signal. That is, the signal sharing module 310 is a module that can receive a plurality of frequency band signals received from the signal transmission apparatus 110 and then combine them and output them.

The signal separation module 320 transmits, to the signal relay module 330 or the femtocell module 340, a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing module 310. In more detail with respect to the operation of the signal separation module 320, the signal sharing module 310 combines at least one signal of the signal of the first frequency band, the signal of the second frequency band and the signal of the third frequency band A combined signal may be received, and a split signal obtained by separating a signal of a third frequency band, which is a predetermined specific frequency band, may be transmitted to the signal relay module 330 or the femtocell module 340.

The signal relay module 330 receives the separation signal from the signal separation module 320 and relays the separation signal to the femtocell device 150. Meanwhile, the signal relay module 330 according to an embodiment of the present invention may be implemented including a first signal relay module and a second signal relay module. Operation of the first signal relay module and the second signal relay module will now be described in detail. The first signal relay module transmits a converted signal obtained by converting the separated signal received from the signal separation module 320 into a preset frequency band, and the second signal relay module separates the converted signal received from the first signal relay module again. The signal is converted into a signal and transmitted to the femtocell module 340. In this case, the first signal relay module and the second signal relay module may transmit and receive signals to each other by wire or wirelessly. In addition, the first signal relay module may transmit a converted signal obtained by converting the separated signal into a frequency band of 5,000 MHz to 5,999 MHz, which is a predetermined frequency band.

The femtocell module 340 amplifies the separated signal received from the signal relay module 330 and transmits it into the coverage. The femtocell module 340 receives the separation signal from the signal separation module 320 or the signal relay module 330, amplifies the separation signal, and transmits the separation signal into the set femtocell coverage. The femtocell module 340 will be described in detail. The femtocell module 340 is installed inside a building to set femtocell coverage, and refers to a module for providing a communication service in a predetermined specific frequency band. That is, the femtocell module 340 may be located in the premises set to femtocell coverage on the outer wall of the building and request a location registration, and may perform communication with a terminal provided with the communication service provided from the femtocell module 340. . For reference, femtocells have an output set to several tens of mW, have a coverage of 10 to 20 m, and are formed inside buildings such as homes or indoors to provide transmission capacity of several Mbps per subscriber to a small number of users (about 1 to 4). To provide a communication service.

4 is a flowchart illustrating a femtocell service providing method according to an embodiment of the present invention.

The signal sharing device 120 receives signals of a plurality of frequency bands from the signal transmitting device 110 (S410). Here, the signal transmitting device 110 is a device for transmitting a signal for voice or data communication, and performs the baseband signal processing, transmission and reception of a wireless signal. 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. In addition, the signal transmitting apparatus 110 includes a first signal transmitting apparatus 112 and a second signal transmitting apparatus 114. The first signal transmitting apparatus 112 includes a signal of a first frequency band and a second frequency band. Is a device for transmitting a signal, and the second signal transmitting device 114 is a device for transmitting a signal of a third frequency band. Herein, the signal of the first frequency band may be a CDMA signal and may have a frequency band of 800 MHz to 999 MHz, and the second frequency band may have a frequency band of 1,900 MHz to 2,199 MHz as a WCDMA signal. The signal of the third frequency band may have a frequency band of 2,400 MHz to 2,499 MHz as a Wi-Fi signal. Here, the frequency band allocated to CDMA, WCDMA, and Wi-Fi may be changed by national policy or setting of each telecommunication company.

The signal sharing device 120 transmits the combined signal combining the signals of the plurality of frequency bands received from the signal transmission device 110 to the signal separation device 130 (S420). In more detail with respect to the operation of the signal sharing device 120, the signal sharing device 120 receives a signal of the first frequency band and a signal of the second frequency band from the first signal transmitting device 112, A combination of receiving a signal of a third frequency band from the two signal transmitting device 114, and receiving and combining at least one signal of the received signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band. Send a signal. That is, the signal sharing device 120 may receive the signals of the plurality of frequency bands received from the plurality of signal transmission devices 110 and then combine them and output them.

The signal separation device 130 transmits a separation signal obtained by separating only a signal of a predetermined specific frequency band from the combined signal received from the signal sharing device 120 to the femtocell AP 140 or the femtocell device 150 (S430). At this time, the signal transmission device 110, the signal sharing device 120 and the signal separation device 130 transmits and receives a signal between each device using the optical path. In more detail, the operation of the signal separation device 130 may be performed by combining the signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band from the signal sharing device 120. A combined signal may be received, and a split signal obtained by separating a signal of a third frequency band, which is a predetermined specific frequency band, may be transmitted to the femtocell AP 140 or the femtocell device 150.

The first femtocell AP 142 transmits a converted signal obtained by converting the separated signal received from the signal separation device 130 into a preset frequency band (S440). The second femtocell AP 144 converts the converted signal received from the first femtocell AP 142 into a separate signal and transmits the femtocell device 150 (S450). Meanwhile, the first femtocell AP 142 and the second femtocell AP 144 may be implemented as one device, the femtocell AP 140, and the femtocell AP 140 receives a separation signal from the signal separation device 130. By performing the relay function to the femtocell device 150. In this case, the first femtocell AP 142 and the second femtocell AP 144 may transmit and receive signals to each other by wire or wirelessly. In addition, the first femtocell AP 142 may transmit a converted signal obtained by converting the separated signal into a frequency band of 5,000 MHz to 5,999 MHz, which is a preset frequency band. That is, the preset frequency band is a signal having a frequency band of 5,000 MHz to 5,999 MHz. On the other hand, if the femtocell service providing system does not transmit the separation signal to the surrounding buildings, but wants to service the separation signal only to a specific location of the building, without using the femtocell AP 140, the signal separation device 130 in the femtocell The separation signal may be sent directly to the device 150. In addition, the signal separation device 130 and the first femtocell AP 142 preferably transmits and receives a signal using a wired cable, and the second femtocell AP 144 and the femtocell device 150 also use a wired signal. It is preferable to transmit and receive. Here, the wired cable may be a UTP cable, but is not necessarily limited thereto.

The femtocell device 150 receives the separation signal from the signal separation device 130 or the femtocell AP 140, amplifies the separation signal, and transmits the separation signal into the set femtocell coverage (S460). That is, the femtocell device 150 is installed inside a building to set femtocell coverage, and is a device for providing a communication service in a predetermined specific frequency band. A request may be made, and communication with the terminal that receives the corresponding communication service from the femtocell device 150 may be performed. The femtocell device 150 sets a home as femtocell coverage for a small number of subscribers, and enters femtocell coverage of content according to a communication service provided by a communication provider and a separate content provider through the femtocell AP 140. To provide.

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 method for providing a femtocell service 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 computer-readable recording medium having recorded thereon a program for implementing a method for providing a femtocell service according to an embodiment of the present invention includes all kinds of recording devices storing data that can be read by a computer system. Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, code, and code segments for implementing an embodiment of the present invention may be easily inferred by programmers skilled in the art to which an embodiment of the present invention belongs.

5 is an exemplary diagram for explaining a case in which a femtocell AP and a femtocell device communicate by wire according to an embodiment of the present invention.

In general optical signal relays, RF signals are transmitted from a device that transmits CDMA (signal in first frequency band) and WCDMA (signal in second frequency band) in order to efficiently expand coverage while minimizing mixing due to multiple signal inputs. When separated and input to the donor module of the optical signal relay located in the signal transmission device, the remote remote device converts the signal transmitted through the optical path into a mobile communication signal to secure mobile communication coverage through the feeder / antenna. In order to build a femtocell, a wired infrastructure had to be secured by laying out the optical fiber to the desired location, leasing the internet line (wired internet service provider), and leasing the optical fiber. However, securing such wired infrastructure in areas where femtocell service is desired is expensive and time-consuming, and it is more difficult to secure femtocell service coverage in small buildings, shopping malls, and homes.

5, FIG. 5 is an exemplary diagram for describing a case in which a femtocell AP 140 and a femtocell device 150 communicate with each other by wire. The first signal transmitting device 112 and the second signal transmitting device ( The combined signal is transmitted through the signal sharing device 120 installed in the optical line for branching the optical line in the optical path linkable to the 114 and transmitting the CDMA (signal in the first frequency band) and the WCDMA (signal in the second frequency band) signals. Send to remote location. The signal separation device 130 installed at a remote site separates a preset frequency band from the combined signal, and transmits the outdoor AP with a UTP cable using a media converter (optical ↔ internet) mounted in the signal separation device 130 to transmit the same. The femtocell service can be extended to the outside using the second femtocell AP 144, which is an outdoor AP capable of expanding the UTP cable and opening the first femtocell AP 142. That is, in addition to transmitting a separation signal in the in-building building through the first femtocell AP 142, when a building (eg, an opposite building) located nearby is located close to the second femtocell AP 144 in the opposite building. ), The first femtocell AP 142 and the second femtocell AP 144 can be connected with a UTP cable, and then the femtocell coverage can be implemented by connecting the second femtocell AP 144 with the femtocell device 150. .

6 is an exemplary diagram for explaining a case in which a femtocell AP and a femtocell device communicate wirelessly according to an embodiment of the present invention.

FIG. 6 is an exemplary diagram for describing a case in which a femtocell AP 140 and a femtocell device 150 communicate wirelessly. In the first femtocell AP 142 which is an outdoor AP constructed by using an optical path of an optical relay device, FIG. When building a femtocell in a distant location, a wireless backhaul is configured with Wi-Fi signals in the 5,000 MHz to 5,999 MHz band between the second femtocell AP 144, which is an outdoor AP, and the second femtocell AP, which is an outdoor AP of the end, In 144, the femtocell can be extended to a UTP cable to build a femtocell service. That is, in addition to transmitting a separation signal in the in-building building through the first femtocell AP 142, and when a building located nearby (eg, an opposite building) is located at a long distance, a second femtocell AP ( 144, and since it is difficult to install a wired cable between the first femtocell AP 142 and the second femtocell AP 144, it is implemented to transmit and receive a signal wirelessly, and the second femtocell AP 144 is femtocell apparatus 150. In this connection, femtocell coverage can be implemented.

As such, the outdoor femtocell AP 142 or the second femtocell AP 144, which is an outdoor AP device, may be installed anywhere in a building where the signal separation device 130, which is an optical relay remote, or in a facility where an antenna of the optical relay device is installed. It is possible to install the first femtocell AP 142 or the second femtocell AP 144, which is an outdoor AP, in addition to the line of sight (LOS) around the space where the femtocell is to be installed, and effectively extend the UTP cable. A femtocell can be built.

7 is an exemplary diagram for explaining a case in which a femtocell AP is installed outdoors according to an embodiment of the present invention and a femtocell device communicates wirelessly.

In the optical signal relay system to which the method of FIG. 6 is to be applied, the outdoor femtocell AP 142, which is the outdoor AP, is opened in the above-described manner, and the second femtocell is the outdoor AP where the femtocell is constructed in the form of a wireless mesh. By configuring the backhaul with the AP 144, a mobile communication provider having an existing communication network can efficiently build a femtocell service network.

That is, in FIG. 7, the first femtocell AP 142 and the second femtocell AP 144, which are outdoor APs, are opened in a place where a general wired infrastructure exists in addition to a method of using an optical path of a mobile communication optical relay device, and a femtocell in a wireless mesh form. The femtocell service network can be efficiently constructed by constructing a backhaul with the first femtocell AP 142 and the second femtocell AP 144 which are outdoor APs. That is, in addition to transmitting a separation signal in the in-building building through the first femtocell AP 142, and when a building located nearby (eg, an opposite building) is located at a long distance, a second femtocell AP ( 144, and since it is difficult to install a wired cable between the first femtocell AP 142 and the second femtocell AP 144, it is implemented to transmit and receive a signal wirelessly, and the second femtocell AP 144 is femtocell apparatus 150. In this connection, femtocell coverage can be implemented. At this time, the first femtocell AP 142 and the second femtocell AP 144 is preferably implemented as an outdoor type of a building, as shown in FIG. 7, but is not necessarily limited thereto.

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 in which femtocells can be constructed by providing a backhaul wirelessly using a network infrastructure or an outdoor relay device in various installation environments in which wired network construction is difficult, and without femtocell construction. The service is a useful invention that can reduce the cost of wired infrastructure construction as well as the cost of wired infrastructure maintenance.

110: signal transmission device 120: signal sharing device
130: signal beak device 140: femtocell AP
150: femtocell device 160: signal relay device
170: in-building relay device 210: downlink portion
220: uplink unit 310: signal sharing module
320: signal separation module 330: signal relay module
340: femtocell module

Claims (15)

A signal sharing device for receiving signals of a plurality of frequency bands from a signal transmitting device and transmitting a combined signal combining the signals of the plurality of frequency bands;
A signal separation device for transmitting a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing device; And
A femto cell device for amplifying the separated signal and transmitting the same into coverage
Femtocell service system comprising a. The method of claim 1,
And a femtocell access point (AP) for receiving the separation signal and relaying the separation signal to the femtocell device. The method of claim 2,
The femtocell AP,
A first femtocell AP transmitting a converted signal obtained by converting the separated signal into a preset frequency band; And
A second femtocell AP converting the received converted signal back into the separated signal and transmitting the converted signal to the femtocell device
The femtocell service system, characterized in that it further comprises. The method of claim 3, wherein
The femtocell service system, characterized in that the first femtocell AP and the second femtocell AP transmit and receive signals wirelessly. The method of claim 3, wherein
The converted signal is a femtocell service system, characterized in that the signal having a frequency band of 5,000 MHz to 5,999 MHz. The method of claim 1,
A signal relay device which amplifies and transmits the remaining signals which are signals of the remaining frequency bands not separated by the signal separation device among the signals received from the signal sharing device; And
An in-building relay device that receives the remaining signal from the signal relay device and transmits the remaining signal;
Femtocell service system comprising a. The method according to claim 6,
The in-building relay device,
The femtocell service system, characterized in that for transmitting the remaining signal through the cable distributed to each layer in the building, and the antenna for transmitting and receiving the signal with the cable. The method of claim 1,
The signal transmitting device, the signal sharing device, and the signal separation device transmit and receive signals between respective devices by using an optical path. The method of claim 1,
The signal sharing device,
And a signal of the first frequency band, the second frequency band, and the signal of the third frequency band from the signal transmitting apparatus and transmits the combined signal as the combined signal. The method of claim 9,
The signal of the first frequency band is a signal having a frequency band of 800 MHz to 999 MHz, the signal of the second frequency band is a signal having a frequency band of 1,900 MHz to 2,199 MHz, the signal of the third frequency band is A femtocell service system, characterized in that the signal having a frequency band of 2,400 MHz to 2,499 MHz. A signal sharing module for receiving signals of a plurality of frequency bands from a signal transmitting device and transmitting a combined signal combining the signals of the plurality of frequency bands;
A signal separation module configured to transmit a separation signal obtained by separating only a signal of a predetermined frequency band among the combined signals received from the signal sharing device;
A signal relay module receiving the separation signal and relaying the separation signal to the femtocell device; And
A femto cell module that amplifies the separated signal and transmits it into the coverage
Femtocell service apparatus comprising a. The method of claim 11,
The signal relay module,
A first signal relay module transmitting a converted signal obtained by converting the separated signal into a preset frequency band; And
A second signal relay module for converting the received converted signal back into the separated signal and transmitting the converted signal to the femtocell device
Femtocell service apparatus comprising a. The method of claim 11,
The signal relay module,
The femtocell service apparatus, characterized in that for transmitting the separation signal by wireless or wired according to the distance to the femtocell module. Receiving a signal of a plurality of frequency bands from a signal transmitting device in a signal sharing device, and transmitting a combined signal combining the signals of the plurality of frequency bands;
Transmitting, by a signal separation device, a separation signal obtained by separating only a signal of a predetermined specific frequency band among the combined signals received from the signal sharing device; And
Amplifying the separated signal in a femtocell device and sending the same into coverage;
Femtocell service method comprising a. 15. The method of claim 14,
The signal transmission step,
Transmitting a converted signal obtained by converting the split signal into a preset frequency band by a first femtocell AP; And
Converting the converted signal received at the second femtocell AP into the separated signal and transmitting the converted signal to the femtocell device
The femtocell service method, characterized in that it further comprises.

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