KR20120134995A - Repeater - Google Patents

Abstract

PURPOSE: A repeater using a channel within respectively different frequency bands is provided to remove system noise by filtering each frequency band. CONSTITUTION: A first interface unit(210) is connected with a gateway device according to a Wi-Fi communication protocol. A second interface unit(220) is connected with a client device according to the Wi-Fi communication protocol. The first interface unit and the second interface unit include one filter unit. The filter unit filters respectively different frequency bands. The filter unit removes a system noise. [Reference numerals] (210) First interface unit; (220) Second interface unit

Description

Repeater {Repeater}

The present invention relates to a repeater, and more particularly, to a repeater for transmitting and receiving broadcast signals between a gateway device and a client device.

With the development of wireless communication technology, the use of repeaters that can extend the transmission distance between transmission and reception systems is frequently used. The longer the transmission distance in the transmission / reception system, the weaker the signal transmitted from the transmitting side, and thus the repeater amplifies the signal received from the transmitting side and delivers it to the receiving side.

In the conventional case, the repeater used the same channel in transmitting a signal to a transmitting and receiving side. However, when using the same channel, there was a problem that the data transmission amount is reduced by half.

Accordingly, there is a demand for a method for extending the data transmission distance and maintaining a constant data transmission amount.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a repeater for removing system noise by using channels in different frequency bands and filtering each frequency band.

A repeater according to an embodiment of the present invention for achieving the above object includes a first interface unit connected to the gateway device according to the Wi-Fi communication protocol and a second interface unit connected to the client device according to the Wi-Fi communication protocol, At least one of the first interface unit and the second interface unit includes a filter unit for filtering out different frequency bands to remove system noise.

In this case, the different frequency bands may include a lower frequency band corresponding to the first interface unit and an upper frequency band corresponding to the second interface unit, and the lower and upper frequency bands may include a predetermined number of channels or It may be spaced apart by a predetermined frequency band.

In this case, the different frequency bands may be spaced apart by the predetermined number of channels or the predetermined frequency bands so as to reduce inter-channel interference occurring between the first interface unit and the second interface unit.

Meanwhile, the different frequency bands may be spaced apart by the predetermined number of channels or the predetermined frequency bands so as to reduce interference between other repeaters and channels.

The different frequency bands may be included in an unlicensed frequency band.

Meanwhile, the different frequency bands may include a frequency band higher than the dynamic frequency selection (DFS) frequency band and a frequency band lower than the DFS frequency band.

Meanwhile, the different frequency bands may include a lower frequency band corresponding to the first interface unit and an upper frequency band corresponding to the second interface unit, and the lower and upper frequency bands may respectively include some channels of the DFS band and It may include some channels in non-DFS frequency bands.

Meanwhile, each of the first interface unit and the second interface unit may communicate with the gateway device and the client device using the different frequency bands.

The different frequency bands may be included in an unlicensed frequency band higher than a dynamic frequency selection (DFS) frequency band defined in the 5GHZ band and a lower unlicensed frequency band, respectively.

The filter unit may be implemented as at least one band-pass filter for filtering the different frequency bands.

Meanwhile, each of the first interface unit and the second interface unit may further include at least one antenna whose resonance frequency is tuned to the different frequency bands.

The different frequency bands may be included in unlicensed frequency bands that are higher than the DFS frequency band defined in the 5GHZ band and unlicensed frequency bands that are lower, respectively, and the at least one antenna may have a predetermined Q value. It is preferable that it is a large ceramic antenna.

Meanwhile, the repeater according to the present embodiment may further include a shield can for ground shielding the first interface unit and the second interface unit, respectively.

Meanwhile, a repeater according to an embodiment of the present invention may include a first interface unit and a second interface unit communicating with a gateway device and a client device by using a channel within a specific frequency band defined in a Wi-Fi communication protocol, and the specific frequency. At least one of the first interface unit and the second interface unit is configured to use a signal detector for detecting a frequency use state of a band and a channel of a frequency band different from the specific frequency band when a frequency use state is detected in the specific frequency band. It includes a control unit for controlling one.

In this case, the signal detector detects a state of use of the frequency in the other frequency band, and the controller detects the signal using the frequency in the other frequency band by the signal detector. And limiting the use of the frequency band used by the signal to the second interface unit.

On the other hand, the channel of the other frequency band is preferably a channel using a frequency band spaced apart from the frequency band used by the channel of the specific frequency band.

Meanwhile, the specific frequency band is included in an unlicensed frequency band within a 5 GHz band defined by the Wi-Fi communication protocol, and a frequency band different from the specific frequency band is a DFS (Dynamic Frequency) within a 5 GHz band defined by the Wi-Fi communication protocol. selection) may be included in the frequency band.

Meanwhile, each of the first interface unit and the second interface unit may include at least one band pass filter for filtering each of the specific frequency band and the other frequency band.

Meanwhile, each of the first interface unit and the second interface unit may include at least one antenna whose resonance frequency is tuned to a channel within the specific frequency band and a channel of the other frequency band.

The shield can may further include a shield can for ground shielding the first interface unit and the second interface unit, respectively.

According to various embodiments of the present disclosure, the repeater may transmit and receive broadcast signals to and from the gateway device and the client device by using higher and lower frequency bands than the DFS frequency band within different frequency bands, that is, 5 GHz defined in the Wi-Fi communication protocol. Can be. Accordingly, the data transmission amount can be kept constant while the data transmission distance can be extended.

In addition, since the repeater includes a filter unit for filtering different frequency bands, the receiver may secure desired reception sensitivity by eliminating interference that may occur when transmitting and receiving broadcast signals using channels in different frequency bands. Will be.

1 is a view for explaining a home network system according to an embodiment of the present invention;
2 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention;
3 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention;
4 is a view for explaining the characteristics of the filter unit according to an embodiment of the present invention;
5 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention;
6 is a view for explaining an antenna characteristic according to an embodiment of the present invention;
7 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention;
8 is a block diagram illustrating a configuration of a gateway device according to an embodiment of the present invention;
9 is a diagram for describing a method of a gateway device transmitting a broadcast signal to a client device through a repeater according to one embodiment of the present invention;
10 is a table for explaining a channel used for wireless communication in an unlicensed frequency band according to an embodiment of the present invention;
11 is a view for explaining adjacent channel interference that may occur when using two repeaters using different channels;
12 is a block diagram illustrating a detailed configuration of a repeater according to an embodiment of the present invention;
13 is a table illustrating a channel used for wireless communication in an unlicensed band and a DFS band according to an embodiment of the present invention;
14 is a view for explaining a method for excluding adjacent channel interference according to an embodiment of the present invention;
15 is a view for explaining a schematic method of transmitting a broadcast signal between a gateway device, a repeater and a client device according to an embodiment of the present invention;
FIG. 16 is a diagram for describing a schematic method of transmitting a broadcast signal between a gateway device, a repeater, and a client device according to an embodiment of the present invention; and
17 is a flowchart illustrating a broadcast signal relay method between a gateway device and a client device according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

1 is a diagram illustrating a home network system according to an exemplary embodiment. As shown in FIG. 1, the broadcast transmission system 1000 according to the present embodiment includes a gateway device 100, a repeater 200, and client devices 300-1, 300-2, 300-3, and 300-4. , 300-5, 300-6).

The gateway device 100 transmits various signals provided from the outside to the repeater 200 and the client devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300-6 provided in the home. To pass.

In detail, the gateway device 100 may receive a digital cable broadcast signal (hereinafter, referred to as a broadcast signal) and a data signal that are input through a cable (not shown) in a quadrature amplitude modulation (QAM) scheme from the outside. Can be input.

In addition, the gateway device 100 may transmit a broadcast signal to the repeater 200 connected according to the Wi-Fi communication protocol using a preset frequency band. In addition, the gateway device 100 may access the client devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300-6 connected to the Wi-Fi communication protocol using a preset frequency band. The broadcast signal may be transmitted.

Here, the predetermined frequency band may be included in a frequency band higher than the DFS frequency band defined in the Wi-Fi communication protocol. In addition, the predetermined frequency band may be included in a frequency band higher than the DFS frequency band defined in the Wi-Fi communication protocol.

Specifically, the gateway device 100 transmits a broadcast signal to the repeater 200 and the client devices 300-1, 300-2, using an unlicensed frequency band (ISM) defined according to a Wi-Fi communication protocol. 300-3, 300-4, 300-5, 300-6). To this end, the gateway device 100 may be provided with a Wi-Fi communication module.

Here, the unlicensed frequency band is a frequency band established by the Federal Communications Commission (FCC) and can be used by anyone without permission (902 MHz to 928 MHz, 2.4 GHz to 2.4835 GHz, 5.15 GHz to 5.825). GHz) refers to a 2 GHz band or a 5 GHz band. In addition, the DFS frequency band is a 5.225 GHz to 5.715 GHz band included in the unlicensed frequency band, and may mean a band used by military radar, weather, radio navigation, or satellite radar.

In particular, the gateway device 100 according to the present embodiment uses a 5 GHz band among the unlicensed frequency bands, and the unlicensed frequency band that is higher than the dynamic frequency selection (DFS) frequency band in the 5 GHz band or lower than the DFS frequency band. The broadcast signal may be transmitted using a frequency band.

Meanwhile, the gateway device 100 transmits the broadcast signal and the data signal to the repeater 200 and the plurality of display devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300 using a wired cable. -6). To this end, the gateway device 100 may include interfaces such as S-Video, component, composite, D-Sub, DVI, and high definition multimedia interface (HDMI).

The client devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300-6 receive broadcast signals or data signals from the gateway device 100 or the repeater 200, and each device receives a broadcast signal or a data signal. It can perform a function corresponding to.

For example, when the client devices 300-1, 300-2, 300-3, and 300-4 are digital TVs, the client devices 300-1, 300-2, 300-3, and 300-4 are gateway devices. The video signal and the audio signal included in the broadcast signal received from the 100 or the repeater 200 may be processed and provided to the user. Here, the client devices 300-1, 300-2, 300-3, and 300-4 may receive a broadcast signal from the gateway device 100 or the repeater 200 in a wired or wireless manner.

As another example, when the client devices 300-5 and 300-6 are wireless terminals or notebook computers, data communication with the gateway device 100 or the repeater 200 may be performed using a Wi-Fi communication protocol or a wired cable. .

Meanwhile, in the above-described embodiment, the client devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300-6 have been described as being digital TVs, wireless terminals, or laptops. Is nothing. That is, a display device such as a desktop or a PMP capable of outputting a broadcast signal and performing data communication may also correspond.

On the other hand, in order to provide seamless digital broadcasting to the user in the client devices 300-1, 300-2, 300-3, 300-4, 300-5, and 300-6, the client devices 300-1. , 300-2, 300-3, 300-4, 300-5, and 300-6 should receive a broadcast signal of a predetermined transmission amount (for example, 20Mbps to 30Mbps) or more.

However, the broadcast signal is transmitted from the gateway device 100 to the client devices 300-1, 300-2, 300-4, 300-5, and 300-6 by using a wireless method (for example, Wi-Fi communication method). , It is difficult to secure a certain amount of transmission due to an obstacle such as a wall installed between the client devices 300-1, 300-2, 300-4, 300-5, and 300-6 and the gateway device 100. have.

Therefore, the repeater 200 amplifies and transmits the broadcast signal received from the gateway device 100 in order to enlarge the transmission amount and transmission distance of the broadcast signal. That is, the broadcast signal received from the gateway device 100 may amplify and transmit the broadcast signal to a client device 300-1 located in an area of less than 20 Mbps (or 30 Mbps), that is, a shaded area.

In this case, the repeater 200 may transmit the broadcast signal to the client device 300-1 using a frequency band different from the preset frequency band.

Here, the preset frequency band may mean a frequency band used between the gateway device 100 and the repeater 200.

Therefore, if the preset frequency band is included in the unlicensed frequency band higher than the DFS frequency band defined in the Wi-Fi communication protocol, another frequency band may be included in the unlicensed frequency band lower than the DFS frequency band. When the preset frequency band is included in the unlicensed frequency band lower than the DFS frequency band defined in the Wi-Fi communication protocol, another frequency band may be included in the unlicensed frequency band higher than the DFS frequency band.

That is, when the gateway device 100 transmits a broadcast signal to the repeater 200 using an unlicensed frequency band higher than the DFS frequency band in the 5 GHz band, the repeater 200 is an unlicensed frequency band lower than the DFS frequency band. The broadcast signal may be transmitted to the client device 300-1 by using. In addition, when the gateway device 100 transmits a broadcast signal to the repeater 200 using an unlicensed frequency band lower than the DFS frequency band in the 5 GHz band, the repeater 200 is an unlicensed frequency band higher than the DFS frequency band. The broadcast signal may be transmitted to the client device 300-1 by using.

That is, since the repeater 200 transmits the broadcast signal to the client device 300-1 by using a frequency band different from the frequency band used between the gateway device 100, adjacent channel interference can be reduced.

To this end, the repeater 200 serves to transmit a broadcast signal received from the STA and the gateway device 100 to the client device 300-1, which receives the broadcast signal from the gateway device 100. An access point (AP) may be provided.

In addition, as described above, the repeater 200 is a Wi-Fi channel (that is, a channel between the gateway device 100 and the STA) connected to the gateway device 100 side and a Wi-Fi channel connected to the client device 300-1 side ( That is, the channel between the client device 300 and the AP) may be operated differently.

Meanwhile, in the above-described embodiment, it has been described that one client device receives a broadcast signal through a repeater, but this is only an example, and a plurality of client devices may receive the broadcast signal through the repeater.

Meanwhile, as shown in FIG. 1, the broadcast transmission system 1000 according to the present embodiment may further include a wired terminal 400.

The wired terminal 400 may transmit and receive voice signals to and from the outside using a telephone line.

As described above, according to the present invention, a user can receive a seamless digital broadcasting service at a desired place without installing a separate cable in the home in that it transmits a broadcast signal or a data signal input from the outside using a Wi-Fi communication protocol. It becomes possible.

In addition, the repeater relays a broadcast signal between the gateway device and the display device using channels of different frequency bands, thereby preventing performance degradation due to channel interference.

2 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention. As shown in FIG. 2, the repeater 200 includes a first interface unit 210 and a second interface unit 220.

The first interface unit 210 is connected to the gateway device according to the Wi-Fi communication protocol and receives a broadcast signal from the gateway device.

The second interface unit 220 may be connected to the client device according to the Wi-Fi communication protocol and transmit a broadcast signal to the client device.

To this end, each of the first interface unit 210 and the second interface unit 220 may be implemented as a Wi-Fi communication module.

Meanwhile, the first interface unit 210 and the second interface unit 220 may use different frequency bands.

Here, the different frequency bands include a lower frequency band corresponding to the first interface unit 210 and an upper frequency band corresponding to the second interface unit 220, and the lower and upper frequency bands have a predetermined number of channels. Or it may be spaced apart by a predetermined frequency band. That is, different frequency bands may be spaced apart by a predetermined number of channels or a predetermined frequency band to reduce inter-channel interference occurring between the first interface unit 210 and the second interface unit 220.

Specifically, different frequency bands used by the first interface unit 210 and the second interface unit 220 are included in the unlicensed frequency band, and more specifically, the frequency band and the DFS frequency band that are higher than the DFS frequency band. It may include a lower frequency band.

That is, different frequency bands are included in the unlicensed frequency band within the 5 GHz band defined by the Wi-Fi communication protocol, and specifically, the unlicensed frequency band higher than the DFS frequency band defined within 5 GHz and unlicensed lower than the DFS frequency band. It may be included in the frequency band.

Specifically, when the first interface unit 210 receives a broadcast signal from the gateway device using an unlicensed frequency band higher than the DFS frequency band defined within 5 GHz defined by the Wi-Fi communication protocol, the second interface unit 220. ) May transmit the broadcast signal to the client device using an unlicensed frequency band lower than the DFS frequency band.

In addition, when the first interface unit 210 receives a broadcast signal from the gateway device using an unlicensed frequency band lower than the DFS frequency band defined within 5 GHz defined by the Wi-Fi communication protocol, the second interface unit 220. The UE may transmit a broadcast signal to the client device using an unlicensed frequency band higher than the DFS frequency band.

Here, the unlicensed frequency band higher than the DFS frequency band means 5.725 GHz to 5.825 GHz frequency band (5.8 GHz frequency band), and the unlicensed frequency band lower than the DFS frequency band is 5.15 GHz to 5.25 GHz frequency band ( 5.2 GHz frequency band).

Accordingly, the first interface unit 210 and the second interface unit 220 uses channels in different frequency bands even in the 5 GHz frequency band defined in the Wi-Fi communication protocol, and thus, the client device 300 in the gateway device 100. The broadcast signal can be transmitted through the.

Meanwhile, different frequency bands include a lower frequency band corresponding to the first interface unit 210 and an upper frequency band corresponding to the second interface unit 220, and the lower and upper frequency bands respectively correspond to the DFS frequency band. Some channels and some channels in non-DFS frequency bands may be included. Alternatively, the different frequency bands may include an upper frequency band corresponding to the first interface unit 210 and a lower frequency band corresponding to the second interface unit 220, and the lower and upper frequency bands may respectively correspond to the DFS frequency band. Some channels and some channels in non-DFS frequency bands may be included.

In addition, different frequency bands used by the first interface unit 210 and the second interface unit 220 may be spaced apart by a predetermined number of channels or a predetermined frequency band to reduce interference between channels with other repeaters. .

The frequency bands used by the first interface unit 210 and the second interface unit 220 will be described in more detail with reference to FIGS. 10 and 12 to 14.

Meanwhile, when transmitting a data signal, the first interface unit 210 and the second interface unit 220 use the 2 GHz band of the unlicensed frequency band, that is, the 2.4 GHz to 2.4835 GHz band, and the client device 100 and the client. The device 300 may be relayed.

Meanwhile, the repeater 200 according to the present embodiment uses channels in different frequency bands at the transmitting and receiving side as described above. Accordingly, the repeater 200 according to the present embodiment may include a filter unit, an antenna, a shield can, and the like in order to remove radio channel interference caused by using different channels on the transmitting and receiving side. Hereinafter, with reference to FIGS. 3 to 7 will be described in more detail.

3 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention. As shown in FIG. 3, the repeater 200 includes a first interface unit 210, a second interface unit 220, and filter units 215 and 225. Meanwhile, before describing FIG. 3, since the same reference numerals as in FIG. 2 perform the same function, detailed description of overlapping portions will be omitted.

The first interface unit 210 is connected to the gateway device according to the Wi-Fi communication protocol.

The second interface unit 220 is connected to the client device according to the Wi-Fi communication protocol.

Each of the first interface unit 210 and the second interface unit 220 may communicate with the gateway device and the client device by using different frequency bands. Here, different frequency bands may be included in the unlicensed frequency band higher than the DFS frequency band defined within the 5 GHz band and the unlicensed frequency band lower. This has been described in detail with reference to FIG. 2.

Meanwhile, at least one of the first interface unit 210 and the second interface unit 220 may include filter units 215 and 225 for filtering out different frequency bands to remove system noise. Here, the system noise may refer to interference generated from a transmitting side to a receiving side by using channels in different frequency bands.

The first filter unit 215 provided in the first interface unit 210 filters the frequency band used for communication with the gateway device. To this end, the first filter unit 215 may be implemented as a band pass filter for filtering only the frequency band used by the first interface unit 210.

 The second filter unit 225 included in the second interface unit 220 filters the frequency band used for communication with the client device. To this end, the second filter unit 225 may be implemented as a band pass filter for filtering only the frequency band used by the second interface unit 210.

Accordingly, by using channels in different frequency bands on the transmitting and receiving side, the high output signal on the transmitting side can be prevented from being influenced by in-band noise.

That is, when the second interface unit 220 transmits a broadcast signal to the client device using an unlicensed frequency band higher than the DFS frequency band, some of the transmitted broadcast signals are induced to the first interface unit 210. By preventing the interference, interference with the broadcast signal received from the gateway device through the first interface unit 210 can be suppressed. Accordingly, an isolation performance of approximately 60 decibels (dB) can be secured.

4 is a view for explaining the characteristics of the filter unit according to an embodiment of the present invention. Specifically, in the example illustrated in FIG. 4, the first interface unit 210 uses a channel in an unlicensed lower frequency band (Lower band) that is lower than the DFS frequency band, and the second interface unit 220 uses a channel in the DFS frequency band. In the case where a channel in an upper unlicensed frequency band (Upper band) is used, the filter characteristics of the first filter unit 215 and the second filter unit 225 are described.

For example, as illustrated in FIG. 4, the first filter unit 215 may be implemented as a band pass filter having a center frequency of 5.2 GHz and a bandwidth of 100 MHz to filter only an unlicensed frequency band lower than the DFS frequency band. have. In addition, the second filter unit 225 may be implemented as a band pass filter having a center frequency of 5.775 GHz and a bandwidth of 100 MHz to filter only an unlicensed frequency band higher than the DFS frequency band.

Accordingly, system noise may be filtered by removing interference between the first interface unit 210 and the second interface unit 220 using channels in different frequency bands.

Meanwhile, in the above-described embodiment, the first filter unit 215 has been described as having a center frequency of 5.2 GHz and a center frequency of the second filter unit 225 is 5.775 GHz, but this is only an example. That is, an unlicensed frequency band higher than the DFS frequency band is used by the first interface unit 210 and an unlicensed frequency band lower than the DFS frequency band by the second interface unit 220. In the case of using, the first filter unit 215 may be implemented as a band pass filter having a center frequency of 5.775 GHz and a band pass filter having a center frequency of the second filter unit 225 of 5.2 GHz. .

5 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention. As shown in FIG. 5, the repeater 200 includes a first interface unit 210, a second interface unit 220, filter units 215 and 225, and antennas 230 and 240. Meanwhile, before describing FIG. 5, since the same reference numerals as in FIGS. 2 and 3 perform the same functions, detailed descriptions of overlapping portions will be omitted.

Each of the first interface unit 210 and the second interface unit 220 may further include at least one antenna 230 and 230 in which resonance frequencies are tuned to different frequency bands.

Here, different frequency bands may be included in the unlicensed frequency band higher than the DFS frequency band defined in the 5 GHz band and the unlicensed frequency band lower than each other, and the at least one antenna 230 or 240 may be a preset Q. It can be implemented with a ceramic antenna larger than the value. Hereinafter, with reference to the accompanying Figure 6, it will be described in more detail.

6 is a diagram for explaining antenna characteristics according to an exemplary embodiment. Specifically, in the example shown in FIG. 6, the first interface unit 210 uses a channel in an unlicensed lower frequency band (Lower band) that is lower than the DFS frequency band, and the second interface unit 220 uses a channel in the DFS frequency band. In the case where a channel in an upper unlicensed frequency band (Upper band) is used, the characteristics of the first antenna 230 and the second antenna 240 are described.

For example, as shown in FIG. 6, the first antenna 230 may be implemented as a high-cue ceramic antenna having high frequency selectivity for an unlicensed frequency band lower than the DFS frequency band, that is, the 5.15 GHz to 5.25 GHz band. The second antenna 240 may be implemented as a high cue ceramic antenna having high frequency selectivity for an unlicensed frequency band that is higher than a DFS frequency band, that is, a 5.725 GHz to 5.825 GHz band.

Accordingly, the antenna resonance frequency of the transmission / reception side channel can be limited. That is, the resonance frequency of the channel can be separated between the first interface unit 210 and the second interface unit 220 using channels in different frequency bands, so that a shielding effect of about 30 decibels can be secured. do.

7 is a block diagram illustrating a configuration of a repeater according to an embodiment of the present invention. As shown in FIG. 7, the repeater 200 includes a first interface unit 210, a second interface unit 220, a filter unit 215 and 225, and antennas 230 and 240. The shield 210 may further include a shield can shielding each of the unit 210 and the second interface unit 220. Meanwhile, before describing FIG. 7, since the same reference numerals as in FIGS. 2, 3, and 5 perform the same functions, detailed descriptions of overlapping portions will be omitted.

The repeater 200 according to the present exemplary embodiment may further include a shield can for ground shielding the first interface unit 210 and the second interface unit 220, respectively. In detail, the shield can may be made of a conductive material such as aluminum to connect the first interface 210 and the second interface 220 to the ground GND.

Accordingly, the high frequency noise generated at the transmitting and receiving side can be bypassed to the ground, thereby minimizing interference such as pattern coupling, air radiation, and ground noise, and using channels in different frequencies. A shielding effect of about 10 decibels may be secured between the first interface unit 210 and the second interface unit 220.

Meanwhile, in the above-described embodiment, a method of reducing interference by ground shielding each of the first interface unit 210 and the second interface unit 220 has been described, but this is merely an example. That is, by separately shielding a printed circuit board layer (eg, a PCB6 layer) inside the first interface unit 210 and the second interface unit 220, the first interface unit 210 and the second interface unit are shielded. Of course, the interference between the interface unit 220 can be reduced.

Meanwhile, the repeater 200 according to an embodiment of the present invention uses a filter unit 215 and 225, an antenna 230 and 240, a shield can, and the like, and a first interface unit using channels in different frequency bands. A shielding effect of about 93 dB or more may be secured between the 210 and the second interface unit 220.

Meanwhile, in the above-described embodiments, the filter unit, the antenna, and the shielding process are sequentially added to the repeater, but this is merely an example, and these configurations may be added to the repeater individually or in combination. That is, the repeater includes only the filter unit, the repeater including only the antenna, and the repeater performed only with the ground shielding process. The repeater may include the filter unit and the repeater with the ground shielding process.

8 is a block diagram illustrating a configuration of a gateway device according to an embodiment of the present invention. As shown in FIG. 8, the gateway device 100 includes an interface unit 110, a tuner unit 120, a signal processor 130, and a controller 140.

The interface unit 110 may be connected to the repeater according to the Wi-Fi communication protocol. In detail, the interface unit 110 may transmit a broadcast signal to the repeater using an unlicensed frequency band higher than the DFS frequency band within 5 GHz or an unlicensed frequency band lower than the DFS frequency band defined in the Wi-Fi communication protocol. . To this end, the interface unit 110 may include a Wi-Fi module.

In addition, the interface unit 110 may be connected to at least one client device according to a Wi-Fi communication protocol or a wired communication protocol.

In detail, the interface unit 110 may transmit a broadcast signal to the client device using an unlicensed frequency band higher than the DFS frequency band within 5 GHz or an unlicensed frequency band lower than the DFS frequency band defined in the Wi-Fi communication protocol. have. To this end, the interface unit 110 may include a Wi-Fi module.

The interface unit 110 transmits a broadcast signal to a client device in a wired manner, including S-video, components, composite, D-Sub, DVI, and HDMI (High Definition Multimedia Interface). Can be.

The interface unit 110 may receive a channel tuning command from the client device or the repeater. Here, the interface unit 110 may receive a channel selection command directly from the client device, and when connected to the client device through the repeater, may receive the channel selection command requested by the client device through the repeater.

The tuner unit 120 receives a broadcast signal from the outside.

In detail, the tuner 120 may include a plurality of tuners (not shown) to tune at least one of broadcast signals received by wire or wirelessly. That is, when the channel tuning command is input from the repeater or the client device, the tuner 120 may tune the channel according to the channel tuning command.

For example, when a tuning command for the A channel, the B channel, and the C channel is input from each of the plurality of client devices, the tuner unit 120 may receive a broadcast signal received from corresponding channels among broadcast signals received wirelessly or by wire. Can be tuned.

Accordingly, the tuner unit 120 may include a plurality of tuners.

For example, the tuner unit 120 includes three tuners for tuning broadcast signals provided to the three client devices connected to the interface unit 110 and the Wi-Fi communication protocol, and a broadcast signal provided to one client device connected through the HDMI method. One tuner for tuning the tuner, one tuner for tuning the broadcast signal provided to one client device connected in a component (or composite) manner, and storage means provided in the gateway device 100 (for example, an HDD (Hard). A total of six tuners may be provided, including one tuner for tuning a broadcast signal stored in the Disk Drive).

Here, the three client devices connected according to the Wi-Fi communication protocol may mean a client device directly connected to the gateway device 100 or connected to the gateway device 100 through a repeater.

Although in the above-described embodiment, the tuner unit 120 has been described as having six tuners, this is only an example. That is, according to the Wi-Fi communication protocol, fewer than three client devices may be connected, and more than two display devices may be connected in a wired manner. In addition, of course, two or more tuners may be provided to tune the broadcast signal stored in the gateway device 100. Accordingly, the tuner 120 may be provided with more or less than six tuners.

Meanwhile, the tuner 120 may be implemented to receive a broadcast signal from an external device (eg, an external set top box) connected through an external input unit (not shown).

The signal processor 130 processes the broadcast signal received through the channel tuned by the tuner 120. In detail, the signal processor 130 transmits the broadcast signal received through the tuned channel to the MPEG-2 TS to transmit the broadcast signal to at least one client device connected according to the Wi-Fi communication protocol. Convert to (Transport Stream).

 Meanwhile, the signal processor 130 may decode a broadcast signal of MPEG-2 type to transmit a broadcast signal to at least one client device connected according to a wired communication protocol. To this end, the signal processor 130 may include an MPEG-2 decoder.

The controller 140 controls the overall operation of each component of the gateway device 100.

The controller 140 may allocate the IP according to the Wi-Fi communication protocol to the plurality of client devices, and perform wireless communication according to the Wi-Fi communication protocol with the client device and the repeater through the interface unit 110.

When a channel tuning command is received from a client device or repeater connected in a wireless manner, the tuner 120 controls the tuner 120 to receive a broadcast signal from the corresponding channel, and controls the signal processor 130 to convert the broadcast signal to MPEG-2 TS. Can be converted to

The controller 140 may control the interface unit 110 to transmit the broadcast signal processed by the signal processor 130 to the repeater using a preset frequency band. Here, the preset frequency band may mean an unlicensed frequency band within the 5 GHz band defined by the Wi-Fi communication protocol, and specifically, an unlicensed frequency band or a DFS frequency band higher than the DFS frequency band within the 5 GHz band. It may mean a subband unlicensed frequency band.

In addition, the controller 140 may control the interface unit 110 to directly transmit the broadcast signal processed by the signal processor 130 to the client device. Even in this case, the controller 140 may transmit the broadcast signal to the client device using an unlicensed frequency band higher than the dynamic frequency selection (DFS) frequency band or an unlicensed frequency band lower than the DFS frequency band within the 5 GHz band. have.

Meanwhile, one channel is defined as 20 GHz in an unlicensed frequency band or a DFS frequency band, and the control unit 140 transmits a broadcast signal through two channels, that is, 40 GHz bands, using channel bonding. Can be sent to.

In order to provide seamless broadcast content to a user, the client device needs to secure a transmission amount of 20 Mbps to 30 Mbps. To this end, the controller 140 may transmit a broadcast signal using the 40 GHz band, and may transmit the broadcast signal to up to three client devices so as to satisfy a transmission amount of 20 Mbps to 30 Mbps.

The controller 140 may control the interface unit 110 to use a 2 GHz frequency band used in a Wi-Fi communication protocol when transmitting a data signal based on an Ethernet method to a plurality of client devices. That is, the controller 140 may perform data communication with a plurality of client devices using the 2.4GHz to 2.4835GHz frequency band, which is an unlicensed band, in the 2GHz frequency band.

On the other hand, when the channel selection command is received from the client device connected in a wired manner, the controller 140 may control the tuner 120 to receive a broadcast signal from the corresponding channel. The controller 140 may control the signal processor 130 to decode the received MPEG-2 type broadcast signal and transmit the received signal to the client device.

Although the above-described embodiment has been described as decoding and transmitting a broadcast signal of MPEG-2 in transmitting a broadcast signal to a client device connected in a wired manner, this is only an example. That is, the gateway device may of course transmit the MPEG-2 type broadcast signal to the client device connected in a wired manner without performing the decoding process.

Meanwhile, the gateway device 100 according to an embodiment of the present invention may further include a storage unit (not shown) for storing the broadcast signal received from the tuner unit 120. That is, when a user command for storing a broadcast signal is input from the client device or the repeater, the controller 140 receives a broadcast signal of a corresponding channel through at least one tuner provided in the tuner 120, and receives the received broadcast signal. May be controlled to be stored in the storage unit.

The storage unit (not shown) that performs such a function may be implemented as a nonvolatile memory such as a hard disk drive (HDD), a flash memory, or an electrically erasable and programmable ROM (EEROM).

On the other hand, if a transmission command for the stored broadcast signal from the client device is received through the interface unit 110, the control unit 140 is a signal processing for the broadcast signal stored in the storage unit 150 using the signal processing unit 130 Can be performed.

9 is a diagram for describing a method of transmitting, by a gateway device, a broadcast signal to a client device through a repeater according to an embodiment of the present invention.

The repeater 200 may transmit a channel selection command requested by the client device 300 to the gateway device 100, and the gateway device 100 may transmit a broadcast signal corresponding to the channel selection command to the repeater 200. Here, the gateway device 100 may transmit a broadcast signal in the form of MPEG-2 TS.

Meanwhile, the repeater 200 transmits a broadcast signal received from the station 210 and the gateway device 100 to the client device 300 to receive a broadcast signal from the gateway device 100. An access point (AP) 220 may be included.

Here, the STA 210 and the AP 220 may receive a broadcast signal from the gateway device 100 and transmit the broadcast signal to the client device 300 using different channels within the 5 GHz band defined in the Wi-Fi communication protocol. .

For example, the STA 210 receives a broadcast signal from the gateway device 100 using an unlicensed frequency band higher than the DFS frequency band within a 5 GHz band, and the AP 220 receives an unlicensed lower than the DFS frequency band. The broadcast signal may be transmitted to the client device 300 using the frequency band.

As another example, the STA 210 receives a broadcast signal from the gateway device 100 using an unlicensed frequency band lower than the DFS frequency band within a 5 GHz band, and the AP 220 receives an unlicensed higher than the DFS frequency band. The broadcast signal may be transmitted to the client device 300 using the frequency band.

The client device 300 may process and provide a broadcast signal received from the repeater 200 to the user.

In detail, the client device 300 separates a broadcast signal having an MPEG-2 TS into a video signal, an audio signal, and additional information, and performs signal processing on the video signal and the audio signal. That is, the client device 300 may perform signal processing such as video decoding, video format analysis, video scaling, and audio decoding on the video signal and the audio signal.

In addition, the user may provide a signal processed broadcast signal through a display unit (not shown) and an audio output unit (not shown) included in the client device 300.

Meanwhile, in the above-described embodiment, the repeater 200 has been described as directly connected to the client device 300, but this is merely an example. That is, the repeater 200 and the client device 300 may be connected through other repeaters, of course.

10 is a table for explaining a channel used for wireless communication in an unlicensed frequency band according to an embodiment of the present invention.

As shown in FIG. 10, the gateway device, repeater, and client device uses a frequency band (5.725 GHz to 5.825 GHz) that is higher than the DFS frequency band in the 5 GHz band, and a lower frequency band (5.15 GHz to 5.25 GHz). Broadcast signals can be transmitted and received.

That is, the first interface unit of the repeater that receives the broadcast signal from the gateway device may use 5.15 GHz to 5.25 GHz, which is a lower frequency band corresponding to the first interface unit. The second interface unit of the repeater that transmits the broadcast signal to the client device may use 5.725 GHz to 5.825 GHz, which is an upper frequency band corresponding to the second interface unit. Accordingly, since the channels used by the first interface unit and the second interface unit are spaced apart by a predetermined number or by a predetermined frequency band, inter-channel interference generated between the first interface unit and the second interface unit may be reduced.

Each of the upper band and the lower band is defined as one channel because 20 GHz is defined as one channel, except for the guard band in each band, the lower frequency band is composed of four channels, and the upper frequency band is composed of five channels. do. That is, the lower band consists of Ch36, Ch40, Ch44 and Ch48 having 20 MHz bandwidth and 5180 MHz, 5200 MHz, 5220 MHz, and 5240 MHz, respectively, and the upper band has 20 MHz bandwidth and 5745 MHz, 5765 MHz, 5785 MHz, and 5800 MHz bandwidth. , Ch149, Ch153, Ch157, Ch161, and Ch165 each having 5825 MHz.

Meanwhile, according to an embodiment of the present invention, in order to provide seamless digital broadcasting to up to three client devices by wireless communication, the broadcast signal transmitted from the gateway device to the repeater or the client device should secure a transmission amount of at least 60 Mbps. The ship has been described above. Accordingly, the gateway device, the repeater, and the client device may use channel bonding to bind two adjacent channels in the upper band or the lower band to each other to transmit and receive a broadcast signal using the 40 MHz bandwidth.

That is, as shown in FIG. 10, two channels adjacent to each other in the lower band, i.e., Ch36, Ch40, ii) Ch44, Ch48, and two channels adjacent to each other in the upper band, i) Ch149, Ch153, ii) Ch157, Ch161 can be used.

FIG. 11 is a diagram for describing adjacent channel interference that may occur when two repeaters using different channels are used.

As described above with reference to FIG. 10, the gateway device, the repeater, and the client device transmit and receive the broadcast signal using the 40 MHz bandwidth by tying two adjacent channels in the upper band or the lower band with each other. Therefore, when two or more repeaters are used simultaneously in a broadcast transmission system, adjacent channel interference may occur.

For example, as shown in FIG. 11, the repeater 200-1 receives a broadcast signal from the gateway device 100-1 using Ch36 and Ch40 and uses the Ch157 and Ch161 to transmit the client devices 300-1 and 300. -2), and the repeater 200-2 receives the broadcast signal from the gateway device 100-2 using Ch149 and Ch153, and the client devices 300-3 and 300 using Ch44 and Ch48. Assume a case of transmitting a broadcast signal in -4).

In this case, the repeater 200-1, the gateway device 100-1, the repeater 200-2, and the client devices 300-3 and 300-4 use adjacent channels and repeater 200-1. Since the client devices 300-1 and 300-2, the repeater 200-2, and the gateway device 100-2 use channels adjacent to each other, interference between adjacent channels may occur.

Therefore, to solve this problem, the repeater according to an embodiment of the present invention can transmit and receive broadcast signals using a frequency band other than the unlicensed band, that is, the DFS frequency band. Hereinafter, a repeater according to an embodiment of the present invention will be described in more detail with reference to FIGS. 12 to 14.

12 is a block diagram illustrating a detailed configuration of a repeater according to an embodiment of the present invention. As shown in FIG. 12, the repeater 200 includes a first interface unit 210, a second interface unit 220, and a signal detector 250 and a controller 260. Meanwhile, before describing FIG. 12, since the same reference numerals as in FIGS. 2, 3, 5, and 7 perform the same function, detailed descriptions of overlapping portions will be omitted.

The first interface unit 210 and the second interface unit 220 may communicate with the gateway device and the client device, respectively, using a channel within a specific frequency band defined by the Wi-Fi communication protocol. Herein, the specific frequency band may mean an unlicensed frequency band within the 5 GHz band defined in the Wi-Fi communication protocol.

The signal detector 230 may detect a frequency use state of a specific frequency band and another frequency band. Specifically, the signal detector 230 uses the unlicensed frequency band and the DFS frequency band by another device according to the presence or absence of a signal received from the unlicensed frequency band and the DFS frequency band within the 5 GHz band defined by the Wi-Fi communication protocol. Can be detected. Here, other devices may include other repeaters, military radars, weather, wireless navigation, satellite radar, and the like.

When a frequency use state is detected in a specific frequency band, the controller 240 may control at least one of the first interface unit 210 and the second interface unit 220 to use a channel having a frequency band different from that of the specific frequency band. have.

Here, the specific frequency band may include a lower frequency band corresponding to the first interface unit 210, and the other frequency band may include an upper frequency band corresponding to the second interface unit 220. In addition, the lower frequency band and the upper frequency band may include some channels of the DFS frequency band and some channels of the non-DFS frequency band, respectively.

Alternatively, the specific frequency band may include an upper frequency band corresponding to the first interface unit 210, and the other frequency band may include a lower frequency band corresponding to the second interface unit 220. In addition, the lower frequency band and the upper frequency band may include some channels of the DFS frequency band and some channels of the non-DFS frequency band, respectively.

In addition, different frequency bands used by the first interface unit 210 and the second interface unit 220 may be spaced apart by a predetermined number of channels or a predetermined frequency band to reduce interference between channels with other repeaters. .

Specifically, the specific frequency band may mean an unlicensed frequency band within a 5 GHz band defined by the Wi-Fi communication protocol, and a frequency band different from the specific frequency band may mean a DFS frequency band within the 5 GHz band defined by the Wi-Fi communication protocol.

In addition, when a frequency use state is detected in a specific frequency band, the control unit 240 uses the first interface unit 210 and the second to use a channel using a frequency band spaced apart from the frequency band used by the channel of the specific frequency band. At least one of the interface unit 220 may be controlled.

Meanwhile, when a signal using a frequency in another frequency band is detected by the signal detector 230, the control unit 240 uses a frequency band used by the signal for the first interface unit 210 and the second interface unit 220. You can limit the use of. That is, the controller 240 may control at least one of the first interface unit 210 and the second interface unit 220 to use a channel not used by other devices in the DFS frequency band. Operation of the above-described control unit 240 will be described in more detail with reference to FIG.

Meanwhile, each of the first interface unit 210 and the second interface unit 220 may further include at least one band pass filter for filtering each of a specific frequency band and another frequency band.

Each of the first interface unit 210 and the second interface unit 220 may further include at least one antenna whose resonance frequency is tuned to a channel within a specific frequency band and a channel of another frequency band.

Here, the specific frequency band may mean an unlicensed frequency band within a 5 GHz band defined in the Wi-Fi communication protocol, and a frequency band different from the specific frequency band may mean a DFS frequency band in the 5 GHz band defined in the Wi-Fi communication protocol.

The shield can may further include a shield can for ground shielding the first interface unit 210 and the second interface unit 220.

Such embodiments have been described in detail with reference to FIGS. 3 to 7.

FIG. 13 is a table illustrating a channel used for wireless communication in an unlicensed band and a DFS frequency band according to an embodiment of the present invention. FIG. 13A illustrates a channel used for wireless communication in an unlicensed frequency band, and has been described with reference to FIG. 10.

On the other hand, Figure 13 (b) is a table for explaining the channel used for wireless communication in the unlicensed frequency band and DFS frequency band. As shown in FIG. 13B, the gateway device, the repeater, and the client device have not only an unlicensed frequency band, that is, 5.15 GHz to 5.25 GHz, 5.725 GHz to 5.825 GHz, but also a DFS frequency band, that is, 5.25 GHz to 5.725 GHz. It is possible to transmit and receive broadcast signals using.

The controller 240 uses Ch52, Ch56, Ch60, Ch64, Ch124, Ch128, Ch136, and Ch140 with a bandwidth of 20 MHz and a center frequency of 5260 MHz, 5280 MHz, 5300 MHz, 5320 MHz, 5620 MHz, 5640 MHz, 5680 MHz, and 5700 MHz in the DFS frequency band. The first interface unit 210 and the second interface unit 220 may be controlled.

Accordingly, the first interface unit of the repeater receiving the broadcast signal from the gateway device may use 5.15 GHz to 5.25 GHz and 5.25 GHz to 5.30 GHz, which are lower frequency bands corresponding to the first interface unit. The second interface unit of the repeater transmitting the broadcast signal to the client device may use 5.610 to 5.650 GHz, 5.670 to 5.710 GHz, and 5.25 GHz to 5.725 GHz, which are upper frequency bands corresponding to the second interface unit. That is, each of the lower frequency band and the upper frequency band may include some channels of the DFS frequency band and some channels of the non-DFS frequency band.

For example, the first interface unit 210 receives a broadcast signal from the gateway device using Ch36 and Ch40 of the unlicensed frequency band lower than the DFS frequency band, and the second interface unit 220 is higher than the DFS frequency band. Suppose that broadcast signal is transmitted to client device using Ch149, Ch153 of unlicensed frequency band.

In this case, when the use state of the unlicensed frequency band is detected, that is, when another repeater uses Ch44, Ch48, Ch157, and Ch161, the controller 240 controls the first interface unit 210 and the first to use the DFS frequency band. At least one of the two interface units 220 may be controlled.

In detail, the controller 240 may control to use a channel spaced apart from a channel used by another repeater among other channels defined within the DFS frequency band. In the above-described example, the controller 240 may control the first interface unit 210 to use Ch60 and Ch64 in the DFS frequency band, and the second interface unit 220 to use Ch136 and Ch140 in the DFS frequency band. .

Accordingly, a channel spaced apart from a channel used by another repeater can be used, thereby minimizing adjacent channel interference.

On the other hand, when other devices use Ch136 and Ch140 in the DFS frequency band, the control unit 240 controls the second interface unit 220 to use the channels used by other devices, and to use Ch124 and Ch1428. can do.

14 is a diagram for describing a method for eliminating adjacent channel interference according to an embodiment of the present invention. When two or more repeaters are used as shown in FIG. 14, a repeater according to an embodiment of the present invention may use a frequency band used by another repeater and a predetermined number of channels or to reduce interference between channels with other repeaters. Frequency bands separated by a predetermined frequency band may be used.

That is, some channels Ch52 and Ch56 of the DFS frequency band may be used to eliminate adjacent channel interference, thereby minimizing adjacent channel interference that may occur with other repeaters.

15 is a diagram for describing a schematic method of transmitting a broadcast signal between a gateway device, a repeater, and a client device according to an embodiment of the present invention. As shown in FIG. 15, the client device 300-3, which is located in a shaded area, that is, an area in which a transmission amount of a broadcast signal between the gateway device 100 and the client device 300-3 is less than 20 Mbps to 30 Mbps, may be used as a repeater. Amplified through 200 may receive a broadcast signal.

16 is a diagram for describing a schematic method of transmitting a broadcast signal between a gateway device, a repeater, and a client device according to an embodiment of the present invention.

The gateway device 100 transmits the broadcast signal and the data signal provided from the outside to the repeater 200 and the plurality of client devices 300-1, 300-2, 300-3, and 300-4 provided in the home.

In detail, the gateway device 100 converts the broadcast signal received from the corresponding channel into MPEG-2 TS according to the channel tuning command received from the plurality of client devices 300-1, 300-2, and 300-3. In addition, it can transmit using the 5GHz band according to the Wi-Fi communication protocol. Meanwhile, the gateway device 100 may transmit the data signal using the 2.4 GHz band according to the Wi-Fi communication protocol.

In this case, the gateway device 100 may use 4 × 4 multiple input multiple output (MIMO) technology that can transmit four separate streams to transmit broadcast signals and data signals.

On the other hand, in order to provide seamless digital broadcasting to a user, the broadcast signal transmitted between the client device 300 and the gateway device 100 must satisfy a predetermined transmission amount (for example, 20 Mbps to 30 Mbps) or more. .

Therefore, for the client devices 300-3 and 300-4 in areas where it is difficult to secure a certain amount of transmission, the repeater 200 amplifies the broadcast signal or the data signal input from the gateway device 100 to the client device 300-. 3, 300-4).

In this case, the repeater 200 may operate a channel for receiving a broadcast signal from the gateway device 100 and a channel for transmitting the broadcast signal to the client device 300-3 differently.

Specifically, the repeater 200 receives a broadcast signal from the gateway device 100 using an unlicensed frequency band higher than the DFS frequency band within a 5 GHz band, and uses an unlicensed frequency band higher than the DFS frequency band. The broadcast signal may be transmitted to the client device 300.

In this case, the repeater 200 may reduce interference caused by transmitting and receiving broadcast signals using different channels, including a band pass filter, a high cue ceramic antenna, and a shield can.

Meanwhile, in the above-described embodiment, the repeater 200 receives a broadcast signal from the gateway device 100 using an unlicensed frequency band higher than the DFS frequency band, and uses an unlicensed frequency band lower than the DFS frequency band. As described above, the broadcast signal is transmitted to the client device 300, but this is merely an example. That is, the broadcast signal is received from the gateway device 100 using the unlicensed frequency band lower than the DFS frequency band, and the broadcast signal is transmitted to the client device 300 using the unlicensed frequency band higher than the DFS frequency band. Of course it can.

In addition, when there are two or more repeaters, the repeater 200 may use a channel spaced apart from a transmission / reception channel used by another repeater using a DFS frequency band.

17 is a flowchart illustrating a broadcast signal relay method between a gateway device and a client device according to an embodiment of the present invention.

First, a broadcast signal is received from the gateway device using a preset frequency band (S1610).

In operation S1620, the broadcast signal is transmitted to the client device using a frequency band different from the preset frequency band.

Here, the preset frequency band and other frequency bands may be included in an unlicensed band frequency band within the 5 GHz band defined in the Wi-Fi communication protocol.

In detail, the preset frequency band may be included in an unlicensed frequency band higher than a dynamic frequency selection (DFS) frequency band defined within 5 GHz, and another frequency band may be included in an unlicensed frequency band lower than a DFS frequency band. . In addition, the predetermined frequency band may be included in the unlicensed frequency band lower than the DFS frequency band defined within 5 GHz, and another frequency band may be included in the unlicensed frequency band higher than the DFS frequency band.

On the other hand, in the present invention, as described above, a storage medium including a program for executing a broadcast signal relay method between the gateway device and the client device according to an embodiment of the present invention, that is to include a computer-readable recording medium Can be. Here, the computer readable recording medium includes all kinds of recording devices in which data which can be read by a computer system is stored. Examples of the computer readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and the computer readable recording medium is distributed over networked computer systems, Readable code can be stored and executed.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the above-described specific embodiment, the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood from the technical spirit or the prospect of the present invention.

100: gateway device 110: interface unit
120: tuner unit 130: signal processing unit
140: control unit 200: repeater
210: first interface unit 220: second interface unit
215: first filter portion 225: second filter portion
230: first antenna 240: second antenna
250: signal detector 260: controller

Claims (20)

A first interface unit connected to the gateway device according to the Wi-Fi communication protocol; And
And a second interface unit connected to the client device according to the Wi-Fi communication protocol.
At least one of the first interface unit and the second interface unit repeater, characterized in that it comprises a filter for filtering the different frequency band to remove the system noise. The method of claim 1,
The different frequency bands,
And a lower frequency band corresponding to the first interface unit and an upper frequency band corresponding to the second interface unit, wherein the lower and upper frequency bands are spaced apart by a predetermined number of channels or a predetermined frequency band. Repeater. The method of claim 2,
The different frequency bands,
The repeater, characterized in that spaced apart by the predetermined number of channels or a predetermined frequency band to reduce the inter-channel interference generated between the first interface unit and the second interface unit. The method of claim 2,
The different frequency bands,
Repeater, characterized in that spaced apart by the predetermined number of channels or a predetermined frequency band to reduce the interference between the other repeater and the channel. The method of claim 1,
The different frequency bands,
Repeater, characterized in that included in the unlicensed frequency band. The method of claim 1,
The different frequency bands,
And a frequency band higher than the DFS frequency band and a frequency band lower than the DFS frequency band. The method of claim 1,
The different frequency bands,
A lower frequency band corresponding to the first interface unit and an upper frequency band corresponding to the second interface unit, wherein the lower and upper frequency bands each include some channels of the DFS band and some channels of the non-DFS frequency band. Repeater characterized in that. The method of claim 1,
Each of the first interface unit and the second interface unit,
And using the different frequency bands to communicate with the gateway device and the client device, respectively. The method of claim 1,
The different frequency bands,
And a repeater included in an unlicensed frequency band higher than a dynamic frequency selection (DFS) frequency band defined in the 5GHZ band and a lower unlicensed frequency band, respectively. The method of claim 1,
The filter unit includes:
And at least one band-pass filter for filtering the different frequency bands, respectively. The method of claim 1,
Each of the first interface unit and the second interface unit,
And at least one antenna having a resonant frequency tuned to the different frequency bands. The method of claim 5,
The different frequency bands,
Included in the unlicensed frequency band and the unlicensed frequency band that is higher than the DFS frequency band defined in the 5GHZ band, respectively,
The at least one antenna is a repeater, characterized in that the ceramic antenna larger than a predetermined Q value. The method of claim 1,
And a shield can for ground shielding the first interface unit and the second interface unit, respectively. A first interface unit and a second interface unit communicating with the gateway device and the client device using a channel within a specific frequency band defined in the Wi-Fi communication protocol;
A signal detector detecting a frequency use state of the specific frequency band; And
And a controller configured to control at least one of the first interface unit and the second interface unit to use a channel having a frequency band different from that of the specific frequency band when a frequency use state is detected in the specific frequency band. 15. The method of claim 14,
The signal detector,
Detecting a frequency use state within the other frequency band,
The control unit,
If the signal detection unit detects a signal using a frequency in the other frequency band, the repeater, characterized in that the use of the frequency band used by the signal for the first interface unit and the second interface unit is limited. . 15. The method of claim 14,
The channel of the other frequency band,
And a channel using a frequency band spaced apart from the frequency band used by the channel of the specific frequency band. 17. The method according to any one of claims 14 to 16,
The specific frequency band,
Included in the unlicensed frequency band within the 5GHz band defined by the Wi-Fi communication protocol,
The other frequency band,
Repeater, characterized in that included in the DFS (Dynamic Frequency Selection) frequency band within the 5GHz band defined by the Wi-Fi communication protocol. 15. The method of claim 14,
Each of the first interface unit and the second interface unit,
And at least one band pass filter for filtering each of the specific frequency band and the other frequency band. 15. The method of claim 14,
Each of the first interface unit and the second interface unit,
And at least one antenna having a resonant frequency tuned to a channel within the specific frequency band and a channel of the other frequency band. 15. The method of claim 14,
And a shield can for ground shielding the first interface unit and the second interface unit, respectively.

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