KR101201195B1 - Apparatus for relay using Time Division Duplexing application - Google Patents

Abstract

The present invention relates to a time division duplex relay apparatus, and unlike a conventional time division duplex relay apparatus having two paths for processing an uplink relay signal and a downlink relay signal, a single path is used. An object of the present invention is to provide a time division duplex relay apparatus for processing both an uplink relay signal and a downlink relay signal.

To this end, the present invention, in the time division duplex relay device, the relay signal received through the first antenna during the uplink relay to the low-noise amplifying means and the second relayed signal amplified by the transmission power in the power amplifying means Switching means for transmitting to the antenna, the relay signal received through the second antenna during the downlink relay to the low noise amplifying means and for transmitting the relay signal amplified by the power output from the power amplifying means to the first antenna; The low noise amplifying means for low noise amplifying the relay signal received through the switching means; Gain adjusting means for adjusting the gain of the relay signal amplified by the low noise amplifying means; The power amplifying means for amplifying the gain-regulated relay signal by the output power by the gain adjusting means; Directional branching means for branching the relay signal received through the second antenna; Detection means for detecting a relay signal branched through the directional branching means; And setting a gain value of the gain adjusting means, controlling the switching means to perform a downlink relay as the detection means detects the relay signal, and uplink relay as the detection means does not detect the relay signal. And control means for controlling the switching means such that

Time Division Duplex, Relay, DPDT, Directional Coupler, Uplink, Downlink

Description

Time division duplex relay device {Apparatus for relay using Time Division Duplexing application}

1 is a configuration diagram of an embodiment of a conventional time division duplex relay apparatus;

2 is a diagram illustrating an embodiment of a time division duplex relay apparatus according to the present invention.

3 is a configuration diagram of another embodiment of a time division duplex relay device according to the present invention;

4 is a configuration diagram of another embodiment of a time division duplex relay device according to the present invention;

5 is a configuration diagram of another embodiment of a time division duplex relay device according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

201: first antenna 202: second antenna

203: switch 204: low noise amplifier

205: gain regulator 206: power amplifier

207: Directional Coupler 208: Detector

209: controller

The present invention relates to a time division duplex relay device, and more specifically, unlike a conventional time division duplex relay device having two paths for processing an uplink relay signal and a downlink relay signal, one path The present invention relates to a time division duplex relay apparatus for processing both an uplink relay signal and a downlink relay signal.

Recently, as frequency acquisition is a big problem in the wireless communication market, a TDD (Time Division Duplex) method, which enables communication with a single frequency, is getting more attention. Unlike the past, this is believed to be possible due to the development of parts and equipment that can be synchronized at the right time.

TDD can support the same service using fewer timeslots than Frequency Division Duplexing (FDD), which uses different frequency bands for uplink and downlink for bidirectional communication. Rather, it uses an asymmetrical arrangement of up / down timeslots, so it has a similar structure to the current Internet and has a technical characteristic suitable for transmission of many applications.

As a result, the TDD scheme can provide a service at a relatively low cost by enabling a high transmission rate without using only one antenna and using only half the frequency of the FDD scheme.

Due to these characteristics, it has become a very attractive technology for wireless carriers, but in the meantime, it is very difficult to detect synchronization of time slot dynamic allocation and solve the problem of time delay according to transmission distance. I was hit.

Recently, however, various technologies have overcome this problem and are expanding the market. As described above, since downlink can be easily combined with many current wired Internet communication systems, it is in the spotlight again.

The TDD scheme is used not only in a portable Internet system but also in a time division duplex (TDD) relay apparatus for relaying an OFDM modulated radio frequency (RF) spectrum signal between a base station and a terminal.

1 is a configuration of an embodiment of a conventional time division duplex relay apparatus.

As shown in FIG. 1, the conventional time division duplex relay device transmits the relay signal received through the first antenna 101 to the first low noise amplifier 103 or the second power amplifier. A first switch 102 for transmitting the relay signal amplified by the transmission power at 112 to the first antenna 101, and a first low noise for low noise amplification of the relay signal received through the first switch 102. Output power of the relay signal gain-adjusted by the first gain controller 104 and the first gain controller 104 for adjusting the gain of the relay signal amplified by the amplifier 103, the first low noise amplifier 103 The first power amplifier 105 for amplifying the signal, the relay signal amplified by the first power amplifier 105 is transmitted to the second antenna (Antenna 2) 109, or received through the second antenna 109 A second for transmitting the relay signal to the second low noise amplifier 110 Position 106, a second low noise amplifier 110 for low noise amplifying the relay signal received through the second switch 106, and for adjusting the gain of the relay signal amplified by the second low noise amplifier 110. The second gain controller 111 and the relay signal received through the second power amplifier 112 and the second antenna 109 for amplifying the gain-controlled relay signal by the transmission power. Coupler (107) for branching, detector (108) for detecting a relay signal branched through the coupler (107), and the first gain regulator (104) and the second gain regulator (111) Set a gain value, and control the first switch 102 and the second switch 106 to perform a downlink relay as the detector 108 detects the relay signal, and the detector 108 relays the gain value. Uplink relaying is not performed because no signal is detected. And a controller 113 for controlling the first switch 102 and the second switch 106.

This conventional time division duplex relay device has a complicated configuration because it uses two single pole dual thru (SPDT) switches, and a high implementation cost due to the use of two power amplifiers, a low noise amplifier, and a gain regulator. There is this.

In addition, since the conventional time division duplex relay relays a signal using two SPDT switches and two separate amplification paths, in any case, the amplifier in the other direction is not driven to consume unnecessary power. There is a problem that causes.

The present invention has been proposed to solve the above problems, and unlike the conventional time division duplex relay apparatus having two paths for processing the uplink relay signal and the downlink relay signal, the uplink using one path is used. An object of the present invention is to provide a time division duplex relay apparatus for processing both a link relay signal and a downlink relay signal.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

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The apparatus of the present invention for achieving the above object is, in the time division duplex type relay apparatus, the relay signal received by the first antenna to the first low noise amplification means and the relay signal amplified by the transmission power in the power amplification means First switching means for transmitting to the second antenna or the relay signal received by the second antenna to the second low noise amplifying means and for transmitting the relay signal amplified by the transmission power from the power amplifying means to the first antenna ; The first low noise amplifying means for low noise amplifying the relay signal received through the first switching means; First branch means for branching the relay signal amplified by the first low noise amplifying means; First detecting means for detecting a relay signal branched from the first branching means; The second low noise amplifying means for low noise amplifying the relay signal received through the first switching means; Second branching means for branching the relay signal amplified by the second low noise amplifying means; Second detecting means for detecting a relay signal branched from the second branching means; Second switching means for transferring the relay signal low noise amplified by the first low noise amplifying means to the power amplifying means or transferring the relay signal low noise amplified by the second low noise amplifying means to the power amplifying means; The power amplifying means for amplifying the relay signal received through the second switching means into outgoing power; And controlling the first switching means to connect the first antenna and the first low noise amplifying means, and to connect the second antenna and the second low noise amplifying means, and to detect the relay signal at the first detecting means. Controlling the second switching means to connect the first low noise amplifying means and the power amplifying means, and controlling the first switching means to connect the power amplifying means and the second antenna, and the second detecting means. Switching for controlling the second switching means to connect the second low noise amplifying means and the power amplifying means and detecting the first switching means to connect the power amplifying means and the first antenna in response to detecting the relay signal. Control means.

Another apparatus of the present invention is a time division duplex relay apparatus, comprising: power adjusting means for setting a gain value of the variable gain amplifying means; The relay signal received by the first antenna is transmitted to the first low noise amplifying means, and the relay signal amplified by the transmission power by the variable gain amplifier is transmitted to the second antenna, or the relay signal received by the second antenna is transmitted to the second antenna. First switching means for transmitting to the first antenna a relay signal which is transmitted to the low noise amplifying means and amplified by the transmission power by the variable gain amplifying means; The first low noise amplifying means for low noise amplifying the relay signal received through the first switching means; First branch means for branching the relay signal amplified by the first low noise amplifying means; First detecting means for detecting a relay signal branched from the first branching means; The second low noise amplifying means for low noise amplifying the relay signal received through the first switching means; Second branching means for branching the relay signal amplified by the second low noise amplifying means; Second detecting means for detecting a relay signal branched from the second branching means; Second switching means for transferring the relay signal low noise amplified by the first low noise amplifying means to the variable gain amplifying means or transferring the relay signal low noise amplified by the second low noise amplifying means to the variable gain amplifying means; The variable gain amplifying means for amplifying the relay signal received through the second switching means with outgoing power; And controlling the first switching means to connect the first antenna and the first low noise amplifying means, and to connect the second antenna and the second low noise amplifying means, and to detect the relay signal at the first detecting means. And controlling the second switching means to connect the first low noise amplifying means and the variable gain amplifying means, and controlling the first switching means to connect the variable gain amplifying means and the second antenna. The second switching means is controlled to connect the second low noise amplifying means and the variable gain amplifying means and detects the relay signal by the detecting means, and the first switching means is connected to the variable gain amplifying means and the first antenna. Switching control means for controlling.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of a time division duplex relay device according to an embodiment of the present invention, (a) shows a flow of a relay signal in an uplink operation, and (b) shows a flow of a relay signal in a downlink operation. .

First, the time division duplex relay apparatus according to the present invention transmits a relay signal received through the first antenna 201 to a low noise amplifier 204 when uplink relaying, and a power amplifier. The relay signal amplified by the transmission power at 206 is transmitted to the second antenna 202, and the relay signal received through the second antenna 202 is transmitted to the low noise amplifier 204 during downlink relay. A switch (DPDT) 102 for transmitting the relay signal amplified by the output power from the power amplifier 206 to the first antenna 202, and the relay signal received through the switch 102. A low noise amplifier 204 for low noise amplification, a gain adjuster 205 for adjusting the gain of the relay signal amplified by the low noise amplifier 204, and a gain-adjusted relay signal for the gain controller 205 Amplify with Outgoing Power One power amplifier 206, a directional coupler 207 for branching the relay signal received through the second antenna 202, a detector for detecting the relay signal branched through the directional coupler 207 (Detector) 208 and the gain value of the gain adjuster 205 is set, and the detector 208 controls the switch 203 to perform a downlink relay in accordance with the detection of the relay signal, the detector ( The controller 209 may be configured to control the switch 203 to perform uplink relaying as the relay signal is not detected at 208.

Here, the controller 209 connects the second antenna 202 and the low noise amplifier 204 in the downlink relay, connects the power amplifier 206 and the first antenna 201 in the uplink relay, and the first antenna in the uplink relay. 201 and the low noise amplifier 204 are connected, and the power amplifier 206 and the second antenna 202 are connected.

In addition, the switch 102 is preferably a dual pole dual thru (DPDT) switch.

In addition, the directional coupler 207 is not used for the strength of the received signal, it is preferable to use a coupler having a very high directivity (Directivity) that can operate only for the signal transmitted from the second antenna 202 or the system. .

For example, assuming that the total gain of the repeater on the reception path is 60 dB, the maximum received power is -30 dBm, and the directivity of the coupler 207 is 30 dB, the intensity of the signal detected by the detector 208 is 0 dBm.

Therefore, since the strength of the reference power of the detector 208 that determines transmission and reception is 0 dBm, the strength of the transmission output sent from the system to the repeater should be a signal sufficiently larger than 0 dBm based on the P2 terminal.

3 is a configuration diagram of another embodiment of a time division duplex relay device according to the present invention, in which (a) shows a position (solid line) of a normal switch and (b) shows a flow of a relay signal in downlink operation.

First, the time division duplex relay device according to the present invention transfers a relay signal received by the first antenna 301 to the first low noise amplifier 303 and amplifies the relay signal amplified by the transmission power by the power amplifier 306. The relay signal transmitted to the second antenna 309 or the relay signal received from the second antenna 309 to the second low noise amplifier 308 and amplified by the transmission power by the power amplifier 306 to the first antenna ( Amplified by the first switch 302 for transmitting to 301, the first low noise amplifier 303 for low-noise amplifying the relay signal received through the first switch 302, the first low noise amplifier 303 Received through the first coupler 304 for branching the relay signal, the first detector (Detector1) 305 for detecting the relay signal branched from the first coupler 304, the first switch 302 Second low noise for low noise amplifying the relay signal A second coupler 310 for branching the relay signal amplified by the second low noise amplifier 309, and a second detector for detecting the relay signal branched from the second coupler 310. 311, the low-noise amplified relay signal from the first low noise amplifier 303 is transferred to the power amplifier 307, or the low-noise amplified relay signal from the second low noise amplifier 309 is transferred to the power amplifier 307. The second switch 306 for the purpose, the power amplifier 307 for amplifying the relay signal received through the second switch 306 to the transmission power, and the first antenna 301 and the first low noise amplifier 303 Control the first switch 302 so as to connect the second antenna 308 and the second low noise amplifier 309, and detect the relay signal in the first detector 305 so that the first low noise Second switch to connect amplifier 303 and power amplifier 307 Control the first switch 302 to control the 306 and connect the power amplifier 307 and the second antenna 308, and detects the relay signal in the second detector 311 Switch controller 312 for controlling the second switch 306 to connect the 309 and the power amplifier 307 and for controlling the first switch 302 to connect the power amplifier 307 and the first antenna 301. It includes.

Here, the first switch 302 connects the first antenna 301 and the first low noise amplifier 303, connects the power amplifier 306 and the second antenna 309, or connects the second antenna 309 with the second antenna 309. The second low noise amplifier 308 is connected to the power amplifier 306 and the first antenna 301.

4 is a configuration diagram of another embodiment of a time division duplex relay apparatus according to the present invention.

As shown in FIG. 4, the time division duplex relay device according to the present invention transmits the relay signal received by the first antenna 301 to the first low noise amplifier 303 and transmits power from the power amplifier 306. Transfer the amplified relay signal to the second antenna 309 or transfer the relay signal received from the second antenna 309 to the second low noise amplifier 308 and amplify the relay signal to the output power from the power amplifier 306. A first switch 302 for transmitting the relay signal to the first antenna 301, a first low noise amplifier 303 for low noise amplifying the relay signal received through the first switch 302, and the first low noise The first coupler 304 for branching the relay signal amplified by the amplifier 303, the first detector (Detector1) 305 for detecting the relay signal branched from the first coupler 304, the first switch Low noise amplification of the relay signal received through 302 The second low noise amplifier 309, the second coupler 310 for branching the relay signal amplified by the second low noise amplifier 309, for detecting the relay signal branched from the second coupler 310 The relay signal low-amplified by the second detector (Detector2) 311 and the first low-noise amplifier 303 is transferred to the power amplifier 307, or the relay signal low-amplified by the second low-noise amplifier 309 is a power amplifier. The second switch 306 for transmitting to the 307, the variable attenuator 401 for adjusting the gain of the relay signal received through the second switch 306, the gain is attenuated in the variable attenuator 401 A power amplifier 307 for amplifying the relay signal with outgoing power, usually connecting the first antenna 301 and the first low noise amplifier 303, and connecting the second antenna 308 and the second low noise amplifier 309. Control the first switch 302 so that the first switch As the detector 305 detects the relay signal, the second switch 306 is controlled to connect the first low noise amplifier 303 and the power amplifier 307, and the power amplifier 307 and the second antenna 308 are connected. Control the first switch 302, and control the second switch 306 to connect the second low noise amplifier 309 and the power amplifier 307 as the second detector 311 detects the relay signal. A switch controller 312 for controlling the first switch 302 to connect the power amplifier 307 and the first antenna 301, and a power regulator 402 for setting a gain value of the variable attenuator 401. It includes.

Here, the variable attenuator 401 and the power amplifier 307 may be implemented as one variable gain amplifier 501 as shown in FIG. 5. At this time, the power regulator 502 adjusts the gain value of the variable gain amplifier 501.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

The present invention as described above, unlike the conventional time division duplex relay apparatus having two paths for processing the uplink relay signal and the downlink relay signal, respectively, the uplink relay signal and the downlink using one path By processing all the relay signals, there is an effect that can be implemented with a low cost and simple structure.

In addition, the present invention is applied to a communication service system such as WLAN (Wireless LAN), WiBro (Wireless Broadband Internet), etc. to reduce the system construction cost and improve the reliability of the system to provide a low-cost and high-quality communication service There is.

Claims (6)

delete delete delete In the time division duplex relay apparatus, The relay signal received by the first antenna is transmitted to the first low noise amplifying means, and the relay signal amplified by the power transmitted by the power amplifying means is transmitted to the second antenna, or the relay signal received by the second antenna is second low noise. First switching means for transmitting to the amplifying means a relay signal amplified by the transmission power by the power amplifying means to the first antenna; The first low noise amplifying means for low noise amplifying the relay signal received through the first switching means; First branch means for branching the relay signal amplified by the first low noise amplifying means; First detecting means for detecting a relay signal branched from the first branching means; The second low noise amplifying means for low noise amplifying the relay signal received through the first switching means; Second branching means for branching the relay signal amplified by the second low noise amplifying means; Second detecting means for detecting a relay signal branched from the second branching means; Second switching means for transferring the relay signal low noise amplified by the first low noise amplifying means to the power amplifying means or transferring the relay signal low noise amplified by the second low noise amplifying means to the power amplifying means; The power amplifying means for amplifying the relay signal received through the second switching means into outgoing power; And Normally controlling the first switching means to connect the first antenna and the first low noise amplifying means, the second antenna and the second low noise amplifying means, and detects the relay signal in the first detection means And controlling the second switching means to connect the first low noise amplifying means and the power amplifying means, and controlling the first switching means to connect the power amplifying means and the second antenna. Switching control for controlling the second switching means to connect the second low noise amplifying means and the power amplifying means and detecting the first switching means to connect the power amplifying means and the first antenna in response to the relay signal. Way Time division duplex relay device comprising a. 5. The method of claim 4, Variable attenuation means for adjusting the gain of the relay signal received through the second switching means; And Further comprising a power adjusting means for setting a gain value of the variable attenuation means, The power amplification means, And amplifying the relay signal of which gain is attenuated by the variable attenuation means with transmission power. In the time division duplex relay apparatus, Power adjusting means for setting a gain value of the variable gain amplifying means; The relay signal received by the first antenna is transmitted to the first low noise amplifying means, and the relay signal amplified by the transmission power by the variable gain amplifier is transmitted to the second antenna, or the relay signal received by the second antenna is transmitted to the second antenna. First switching means for transmitting to the first antenna a relay signal which is transmitted to the low noise amplifying means and amplified by the transmission power by the variable gain amplifying means; The first low noise amplifying means for low noise amplifying the relay signal received through the first switching means; First branch means for branching the relay signal amplified by the first low noise amplifying means; First detecting means for detecting a relay signal branched from the first branching means; The second low noise amplifying means for low noise amplifying the relay signal received through the first switching means; Second branching means for branching the relay signal amplified by the second low noise amplifying means; Second detecting means for detecting a relay signal branched from the second branching means; Second switching means for transferring the relay signal low noise amplified by the first low noise amplifying means to the variable gain amplifying means or transferring the relay signal low noise amplified by the second low noise amplifying means to the variable gain amplifying means; The variable gain amplifying means for amplifying the relay signal received through the second switching means with outgoing power; And Normally, the first switching means is controlled to connect the first antenna and the first low noise amplifying means, and the second antenna and the second low noise amplifying means, and the first detecting means detects a relay signal. Accordingly controlling the second switching means to connect the first low noise amplifying means and the variable gain amplifying means, and controlling the first switching means to connect the variable gain amplifying means and the second antenna, and detecting the second detection means. Means for controlling the second switching means to connect the second low noise amplifying means and the variable gain amplifying means and detecting the relay signal and controlling the first switching means to connect the variable gain amplifying means and the first antenna. Switching control means Time division duplex relay device comprising a.

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