KR100777942B1 - Rf repeater and thereof controlling method for ttd(time division duplexing) communication using the rf signal detecting time control and switching time control - Google Patents

Abstract

A TDD(Time Division Duplex) RF repeater using RF signal detection time control and switching time control and a relay control method thereof are provided to simply and exactly perform switching time control according to a switch on/off delay algorithm without the loss of Tx data due to an error in a route switch even though an MS(Mobile Station) is in a shadow area. A TDD RF repeater(10) consists of a donor part(100), a service part(200) and a relay part(300). The relay part(300) comprises a downlink signal detection part(304), an uplink signal detection part(309), and the first delay(303). The downlink signal detection part(304) detects a signal, received to and inputted from the donor part(100), on a downlink signaling route to relay the inputted signal to the service part(200) and executes switching control for a service-side route switch(307) to enable downlink mode. The uplink signal detection part(309) detects a signal, received to and inputted from the service part(200), on an uplink signaling route to relay the inputted signal to the donor part(100) and executes switching control for a donor-side route switch(301) to enable uplink mode. The first delay(303) delays time for an MS signal of a BS area, which is detected at the downlink signal detection part(304), so that the uplink signaling route can be activated prior to the downlink signaling route as the service part(200) detects an MS signal of a service area.

Description

RF Repeater and Abstract Controlling Method for TTD (time division duplexing) Communication using the RF Signal Detecting Time Control and Switching Time Control}

1 is a block diagram of an RF repeater for a TTD with some shared downlink / uplink paths according to the related art

2 is a block diagram of a conventional RF repeater for the TTD separated down / uplink path

3 is an explanatory diagram showing an existence signal generated in a base station area and a service area of a repeater;

4 is a state diagram of a change in the RF signal detected by the signal detection unit according to time in FIGS.

5 is a block diagram of an RF repeater block for TDD using RF signal detection time control and switching time control according to the present invention.

6 is a time change of the RF signal detected in each path of the present invention and the path switch state diagram accordingly

7 is an output waveform diagram of an overall path switch operated according to a change in an RF signal detected by a signal detection unit of the present invention.

8 is a relay control method of the RF repeater for TDD using the RF signal detection time control and switching time control according to the present invention

* Description of the main drawing codes *

100 donor part 101: donor antenna

102: first BPF 200: service department

201: service antenna 202: second BPF

300: relay unit 301: donor side path switch

302: first AMP 303: first delay

304: Downlink signal detector 305: Second delay

306: second AMP 307: service side path switch

308: third AMP 309: uplink signal detection unit

310: third delay 311: fourth AMP

The present invention relates to an RF repeater for TDD using RF signal detection time control and switching time control, and a relay control method thereof. More specifically, the present invention relates to an inability to communicate when a service area is a shadow area in a TDD (Time Division Duplexing) network. In order to solve the problem, a signal detector and a delay switch are provided on the downlink signal path to control the signal transmitted along the uplink signal path rather than the signal transmitted along the downlink signal path. The present invention relates to an RF repeater for TDD using only one RF signal detection time control and switching time control, and a relay control method thereof.

In the conventional TDD RF repeater uses a time division multiplexing (TDD) scheme, the TDD scheme transmits and receives the same frequency band between the base station and the terminal. When the base station transmits, the terminal is in a reception state. When the terminal transmits, the base station must have a condition of receiving.

As described above, when the RF repeater is used to solve the communication failure when the service area is a shaded area in the TDD communication network, the downlink of the repeater (transmitted from the base station to the terminal) is accurately predicted. Signal path, uplink (terminal to base station) signal path must be active.

Accordingly, FIG. 1 is a block diagram of an RF repeater for TTD in which a conventional down / uplink path is partially shared, and FIG. 2 is a block diagram of an RF repeater for TTD in which a conventional down / uplink path is separated. Both of them share the transmit / receive antenna of donor side and service side, and connect the sync detection module to the downlink path and refer to the message sent from the base station to accurately detect the transmission time of base station and terminal signals In order to activate the downlink and uplink of the RF repeater at the base station and the terminal transmission time, a path switch mounted on the down / uplink path is driven.

In addition, the mixer shown in FIG. 1 or 2 is required to increase the selectivity of the signal in the IF processing operation, but may be implemented without a mixer for IF processing depending on the situation.

1 and 2 of the prior art can implement a repeater by switching a path switch and a synchronous detection module. However, when the synchronous detection module is used, the repeater price is very high.

In addition, as a conventional technique, an RF repeater for detecting downlink and uplink time by detecting a preamble signal that is always present at the start of the downlink instead of the synchronous detection module may be implemented.

However, the preamble signal may be shaken due to the fading effect, and thus, the detection time may be severely shaken.

3 is a diagram illustrating the existence signal that can occur in the base station area and the service area. As shown in the drawing, the area where the donor antenna of the repeater is installed is the base station area. Terminal signals transmitted from the same coexist. On the other hand, in the service area that is a shaded area, only the terminal signal transmitted from the terminal is generated. However, in the above-described repeater configuration as shown in Figs. 1 and 2, the base station signal received from the donor antenna is input to the repeater during the downlink signal path is formed, and received from the service antenna during the uplink signal path is formed. It is implemented assuming that the terminal signal is input to the repeater. That is, it is designed on the assumption that the base station signal does not exist in the service area during the downlink signal path is formed, and the terminal signal does not exist in the base station area during the time when the uplink signal path is formed.

FIG. 4 is a diagram illustrating a state of change of an RF signal detected by a signal detection unit according to time in FIGS. 1 and 2 according to the related art. As shown in the figure, the time frame structure of the TTD RF repeater is a downlink / uplink The transmission time is separated, and TTG (Tx / Rx Transition Gap) and RTG (RTx / Tx Transition Gap) time are allocated for a predetermined time for the switching operation from transmission to reception or reception to transmission while switching is switched. It is. However, according to the switching operation of the repeater depending on the down / uplink RF signal level as in the prior art, since the service area is a shaded area under actual conditions, no base station signal is generated, but the base station area coexists with both the base station signal and the terminal signal. Done. If a terminal signal, which can be generated in the base station region during the uplink signal path, is received from the antenna and input to the repeater, the downlink signal path will be formed and activated. A collision has occurred and the repeater cannot perform normal operation. That is, when the terminal signal of the base station area and the terminal signal of the service area are simultaneously input to the repeater as shown in FIG. 4, a switching error occurs and thus a problem in that the relay cannot be normally transmitted is generated. In addition, when the service area is a shaded area, the signal is not normally detected during the TTG and RTG time intervals, and a disconnection occurs. Therefore, an error occurs in the switching operation of the path switch, so that the signal data is frequently lost.

Accordingly, the present invention has been made to solve the above problems, and instead of a complicated configuration such as a separate synchronous detection module for determining a switch time of the prior art, a downlink path can be performed to perform a switching control operation at an economical and accurate time. The signal detectors 304 and 309 for switching and controlling the signal paths on the network and the delayers 303 for delaying the transmission time of the signals can be stably activated in the downlink signal path and the uplink signal path of the RF repeater. In the communication system, even if the service area is in the shadow area, RF signal of simple structure can be relayed smoothly without resolving the incommunication status without losing the signal and without switching error due to temporal collision between signals. RF repeater for TDD using detection time control and switching time control It aims to provide a control method.

The RF repeater for TDD using the RF signal detection time control and switching time control according to an embodiment of the present invention for achieving the above object, is installed in the base station area and receives a signal of the base station area or the signal of the service area base station The donor unit 100 transmitting the signal from the donor unit 100 and the donor unit 100 installed in the service area and receiving the signal of the service area or transmitting the signal of the base station area to the service area. In the repeater 10 consisting of a relay unit 300 for relay transmission to the service unit 200 or the signal received from the service unit 200 to the donor unit 100, the relay unit 300 ) Detects the input signal on the downlink signal path for relaying and transmitting the input signal received by the donor unit 100 to the service unit 200 to establish a downlink. The downlink signal detection unit 304 for switching and controlling the service side path switch 307 and the uplink signal path for relaying and transmitting the signal received by the service unit 200 to the donor unit 100. The uplink signal detector 309 and the uplink signal detector 309 for switching control of a donor side path switch 301 so that the uplink is set by detecting the input signal are detected by the terminal signal input from the service area. And a first position of the downlink signal detector 304 so as to activate the uplink signal path first and delaying a time for a terminal signal input from the base station area detected by the downlink signal detector 304. The retarder 303 is characterized in that it is included.

According to an embodiment of the present invention is located at the rear end of the downlink signal detector 304 in the required time to operate the service-side path switch 307 by the signal detected by the downlink signal detector 304 Correspondingly, a second delayer 305 for delaying the time of the donor part 100 signal in order to secure the time when the signal of the donor part 100 reaches the service side path switch 307 through the downlink path. And the service unit corresponding to the time required to operate the donor side path switch 301 according to a signal detected by the uplink signal detector 309 at the rear end of the uplink signal detector 309. A third delayer 310 for delaying the time of the signal of the service unit 200 is further included in order to secure a time for the signal of 200 to reach the donor side path switch 301 through the uplink. It is characterized by.

According to an embodiment of the present invention, when the signal detection unit 304 or 309 of the downlink or uplink detects a signal, an operation of activating the donor side or service side path switches 301 and 307 is immediately performed, and switching is performed. When the operation is activated, the switching operation is maintained for a predetermined time even in the absence of a signal.

In the relay control method of the RF repeater for TDD using the RF signal detection time control and switching time control according to another embodiment of the present invention, the signal received from the antenna (101, 201) of the repeater 10 is relay unit 300 Input side path switch (301, 307) input to the state is set to the on state and the output side path switch (307, 301) outputs a signal from the relay unit 300 is set to the off state, and the relay unit A first signal determination step of detecting a signal input to the signal 300 by the signal detection units 304 and 309 and determining whether there is a detected signal; and as a result of the signal determination of the first signal determination step, the signal detection unit 304 When a signal is detected in step 309, a path activation step of activating the signal path by switching the output path switches 307 and 301 from which the signal is output from an off state to an on state, and after the path activation step, an output side path switch ( 307, 301 came A second signal determination step of determining whether a signal is present by performing an operation of detecting a signal input to the relay unit 300 by the signal detectors 304 and 309 while the signal is continued in a state; and the second signal determination step A delay time counting step of driving an off delay timer of the signal detectors 304 and 309 to count an off delay time if no signal is detected by the signal detectors 304 and 309, and the off delay timer. A third signal determination step of detecting a signal from the signal detection units 304 and 309 for the signal input to the relay unit 300 while driving the signal, and determining the presence or absence of the signal; and the signal determination result of the third signal determination step. When a signal is not detected by the signal detectors 304 and 309, a time comparison step of comparing a preset off delay time and a counted off delay time, a time comparison result of the time comparison step, and a preset If the counted off delay time is larger than the p delay time, the timer reset step of resetting the off delay timer to an initial value and the output side path switches 307 and 301 outputting a signal after performing the timer reset step are turned off. After performing the step of switching to the state, characterized in that performing the standby mode step.

According to another embodiment of the present invention, if a signal is not detected by the signal detectors 304 and 309 as a result of the signal determination of the first signal determination step, the first signal determination step is performed until a signal is detected. When the signal is detected by the signal detectors 304 and 309 as a result of the signal determination of the second signal determination step, the second signal determination step is performed until no signal is detected, and the signal of the third signal determination step is performed. As a result of the determination, when a signal is detected by the signal detectors 304 and 309, the second signal determination step is performed after performing the timer reset step of resetting the off delay timer to an initial value, and comparing the time of the time comparison step. As a result, when the counted off delay time is less than the preset off delay time, the third signal determination step may be further included.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a block diagram of an RF repeater block for TTD using the RF signal detection time control and switching time control according to the present invention, wherein the repeater 10 includes a donor unit 100, a service unit 200, and a relay unit 300. It consists of.

The donor unit 100 includes a donor antenna 101 and a first BPF 102, and the service unit 200 includes a service antenna 201 and a second BPF 202, and the relay unit ( 300 includes a first AMP 302, a first delayer 303, a downlink signal detector 304, a second delayer 305, and a second AMP 306 to form a downlink signal path. And a third AMP 308, an uplink signal detector 309, a third retarder 310, and a fourth AMP 311 that allow uplink signal paths to be formed, and further downlink and uplink. And a donor side path switch 301 and a service side path switch 307 for switching the signal path so that the signal path of the signal path is set.

Therefore, the downlink signal paths of the RF repeater 10 of the present invention by the above components are sequentially the donor antenna 101, the first BPF 102, the donor side path switch 301, the first AMP 302. A first delay 303, a downlink signal detector 304, a second delay 305, a second AMP 306, a service side path switch 307, a second BPF 202 and a service antenna 201), the uplink signal path is sequentially provided with the service antenna 201, the second BPF 202, the service side path switch 307, the third AMP 308, the uplink signal detection unit 309, The third retarder 310, the fourth AMP 311, the donor side path switch 301, the first BPF 102, and the donor antenna 101 are formed.

In more detail, the donor unit 100 receives the base station signal and the terminal signal of the base station area and transmits the input signal to the relay unit 300 or the terminal signal of the service area relayed from the relay unit 300 to the base station area. And a specific frequency band of a base station signal received from the donor antenna 101 and a terminal signal relayed from a terminal signal or a service area at the rear end of the donor antenna 101. A donor side path switch 301 of the relay unit 300 that operates to switch so that a first BPF 102 is filtered so that only a passage is passed, and a downlink signal path or an uplink signal path is formed at the first BPF 102. ). In this case, since the donor antenna 101 is installed in the base station area, both the base station signal and the terminal signal generated in the base station area are received. However, the terminal signal is not always present in the base station area.

The service unit 200 receives a terminal signal of a service area and transmits the input signal to the relay unit 300 or the base station signal and the terminal signal of the base station area relayed and transmitted from the relay unit 300 to the service area. 201 and the rear end of the service antenna 101 are filtered so that only a specific frequency band of the terminal signal and the terminal signal transmitted from the base station area or the terminal signal of the service area received by the service antenna 201 is passed. The second BPF 202 is connected, and the second BPF 202 is connected to the service side path switch 301 of the relay unit 300 which switches to form a downlink signal path or an uplink signal path. In this case, since the service antenna 201 is installed in the service area, only the terminal signal generated in the service area is received.

Looking at the operation of the signal is relayed by the repeater 10 configuration as shown in FIG. 5 of the present invention, since both the base station signal and the terminal signal is present in the base station area, only the terminal signal in the service area, In the case of relay transmission of the base station signal, since the base station signal is transmitted only from the donor antenna 101 to the service antenna 201 through the downlink signal path, that is, the base station signal does not exist in the service area. The base station signal may be normally relayed and transmitted to the service area through the relay unit 300 without collision of the signal. However, when the terminal signal is relayed, the donor antenna 101 relays the terminal signal in the base station area to the service antenna 201 through the downlink signal path, and the service antenna 201 performs the donor antenna 101. In the case of relay transmission of a terminal signal of a low service area through an uplink signal path, that is, two cases occur. In this case, when both signals are simultaneously generated and input to the relay unit 300, the signals on the two paths are temporally transmitted. When a collision occurs with each other, a signal cannot be relayed normally. Therefore, since the first delay unit 303 is provided on the downlink signal path of the relay unit 300 in order to prevent such a signal collision, the uplink signal is delayed because the terminal signal of the downlink signal path is delayed in time. The terminal signal of the service side via the path is relayed preferentially to the donor antenna 101 of the base station via the relay unit 300.

The relay unit 300 is a core configuration of the present invention, and is located between the donor side path switch 301 and the service side path switch 307, and in the case of a downlink signal path, the donor side path switch 301. A first AMP 302 for amplifying a signal input to the relay unit 300 is connected to a rear end of the donor side path switch 301 in the case of an uplink signal path. The fourth AMP (311) for amplifying the signal input through the uplink signal path is connected to and switched.

Accordingly, the donor side path switch 301 is connected to the first AMP 302, and the first AMP 302 is a first delayer 303 for delaying a signal transmitted through a downlink signal path. Is connected to the second delayer 305, and the second delayer 305 is connected to the second AMP 306, and the second AMP 306 is connected to the second AMP 306. Is connected to the service-side path switch 307 to form a downlink signal path, and is input between the first delayer 303 and the second delayer 305 to the relay unit 300 in the base station area. And a downlink signal detector 304 for detecting a signal relayed to the service area is located.

In addition, the service-side path switch 307 is connected to the third AMP 308, the third AMP 308 is connected to the third delayer 310, the third delayer 310 is the fourth The fourth AMP 311 is connected to a donor side path switch 301 to form an uplink signal path, and the third AMP 308 and the third retarder 310. ) Is an uplink signal detector 309 for detecting a signal input to the relay unit 300 from the service area and relayed to the base station area.

The down / uplink signal detectors 304 and 309 monitor and detect signals input on the down / uplink signal paths, and the switching control program is provided to the down / uplink signal detectors 304 and 309 according to the detected signals. The microcomputer control unit is pre-input and stored, and performs a stable switching control operation by sequentially controlling the path switches 301 and 307 of the donor side / service side by operating a switch-off delay timer by the switching control program. .

In the case of the downlink signal path, the downlink signal detection unit 304 relays the signal received from the donor unit 100 to the service unit 200 to relay the first delay on the downlink signal path. It is located between the device 303 and the second delay unit 305, when the signal of the base station area is input to the relay unit 300, the signal is detected by monitoring the relayed and transmitted, and then the detected signal Switching control so that the service-side path switch 307 is switched from the off state to the on state so that the downlink signal path is set by. More specifically, the downlink signal detection unit 304 is provided with a microcomputer controller in which a switching control program is pre-input and stored, so that a signal transmitted by operating a switch-off delay timer by the switching control program is not lost and also an uplink signal. Stable switching control operation is performed by sequentially controlling the time without colliding with the signal transmitted by the relay along the path.

In the case of an uplink signal path, the uplink signal detection unit 309 transmits the signal received from the service unit 200 to the donor unit 100 and transmits the third AMP on the uplink signal path. Located between the 308 and the third delayer 310, when the signal of the service area is input to the relay unit 300, the signal is detected by monitoring the relayed and transmitted, and then detected Switching control so that the donor side path switch 301 is switched from the off state to the on state so that the uplink signal path is set. More specifically, the uplink signal detection unit 309 is provided with a microcomputer control unit in which a switching control program is pre-input and stored so that a signal transmitted by operating the switch-off delay timer by the switching control program is not lost and the downlink signal is also lost. By controlling the time sequentially without colliding with the relayed signal along the path, the switching control is stably performed even when the service area is a shaded area.

In particular, the first delay unit 303 is a core configuration of the present invention provided on the downlink path to sequentially detect and relay each terminal signal that can be generated simultaneously on the down / uplink signal path. The first retarder 303 is preferably a surface acoustic wave filter, and may be any known configuration that performs the same function. The first retarder 303 may be located at a front end of the downlink signal detector 304. The signal is detected by the uplink signal detector 309 to delay the time of the terminal signal of the base station area detected by the downlink signal detector 304 so that the uplink signal path is activated first.

In addition, the second retarder 305 is located at the rear end of the downlink signal detector 304, preferably the same surface acoustic wave filter as the first retarder 303, and performs the same function. All known configurations are possible, and after the service side path switch 307 is operated by a signal detected by the downlink signal detection unit 304, the donor unit 100 is input to the relay unit 300. The signal, that is, the base station and the terminal signal, delays the time of the relay transmission signal so that it can be transmitted to the service side path switch 307 through the downlink path.

In addition, the third retarder 310 is located at the rear end of the uplink signal detector 309, preferably the same surface acoustic wave filter as the first retarder 303, and performs the same function. All known configurations are possible, and the donor side path switch 301 is operated by the signal detected by the uplink signal detection unit 309 and then input from the service unit 200 to the relay unit 300. The signal, ie, the terminal signal, delays the time of the relay transmission signal so that the terminal signal can be transmitted to the donor side path switch 301 through the uplink signal path.

FIG. 6 is a diagram illustrating a time change of an RF signal detected in each path of the present invention and a path switch state according to the present invention. In detail, FIG. 5 illustrates a first delay unit 303 and a signal detector of the relay unit 300 in FIG. When the terminal signal is input to the repeater 10 using a path switching on / off delay algorithm built in the microcomputer control unit of 304 and 309, the signal detection unit 304 and 309 is reached for each down / uplink signal path. The time change of the detected signal and the switching operation of the path switches 301 and 307 accordingly are shown.

In the repeater 10 using the RF signal detection time control and switching time control according to the present invention, the signal is relayed from the donor antenna 101 to the service antenna 201 through the uplink signal path. In the conventional case as described above, when the terminal signal of the base station area and the terminal signal of the service area are simultaneously generated and input to the relay unit 300, both terminal signals are simultaneously present on the downlink signal path and the uplink signal path. Since the repeater 10 does not operate normally due to a collision between the terminal signals, in the present invention, the terminal signal of the base station region delays the time for reaching the downlink signal detection unit 304 of the relay unit 300 and thus the terminal signal of the service region. Is detected first by the uplink signal detector 309. That is, if there is a terminal signal in the base station area, the repeater 10 delays the signal of the downlink signal path so that the signal of the uplink signal path can be detected first and the downlink signal detector 304 and the first AMP 302. The first retarder 303 is provided in between. That is, the terminal of the base station area that is relayed along the downlink signal path by the downlink signal detector 304 by having a first delay unit 303 provided at the front end of the downlink signal detector 304 on the downlink signal path. Since the detection time for the signal is delayed by the time passing through the first delay unit 303 as compared with the time when the terminal signal of the shadow area, which is the service area detected by the uplink signal detection unit 309 on the uplink signal path, is detected. As a result, an uplink signal path that can preferentially transmit a terminal signal generated in a shadow area, which is a service area, is activated.

As a result, when the base station signal of the base station area is input to the relay unit 300 of the repeater 10 and the downlink signal path is formed, the terminal signal of the service area is input to change the uplink signal path. By the time change of the input signal detected by the signal detectors 304 and 307 and the switching operation of the down / uplink path switches 301 and 307, the relay 10 may be normally operated without a signal collision. have.

In addition, when the base station signal of the base station area is input and the signal is relayed and transmitted through the downlink signal path, the terminal of the service area receives the signal and the signal path is switched from the downlink signal path to the uplink signal path. When the signal of the terminal is input and the signal is relayed through the uplink signal path, the terminal signal of the base station area is input and the signal path is switched from the uplink signal path to the downlink signal path as shown in FIG. In the case of a repeater, when the service area is a shaded area, TTG (Tx / Rx Transition Gap) time and RTG (Rx / Tx Transition Gap) time are generated, which causes errors in switching operation of the path switch, resulting in data loss. Although frequently occurred, according to the present invention, the error of the switching operation as described above is normal without loss of data. Serves as a repeater.

Referring to FIG. 6 with reference to the TTD RF repeater using the RF signal detection time control and switching time control according to the present invention, that is, the process of inputting the signal to the relay unit 300 and the down / The time variation of the signal reached and detected by the signal detectors 304 and 309 according to the uplink signal paths and the path switching operation according to the uplink signal paths will be described below.

First, when a signal received from the donor side antenna is input to the relay unit 300, the donor side path switch 301 is on, and the service side path switch 307 on the output side is initially set so that the downlink signal path is formed. Is switched from the off state to the on state immediately, i.e., the time when the downlink signal path is activated in the figure is t1. At this time, from the standpoint of the uplink signal path, the service side path switch 307 which is the input side path switching of the uplink signal path is in an off state. Therefore, the downlink signal path is activated by the above switching switching.

As shown in FIG. 6, the service side path switch 307, which is the output side of the downlink, is maintained in the on state for the time t1 to t2.

In addition, as shown in FIG. 6, the period t2 to t3 is a downlink switch-off time delay period in which no signal is detected after all of the base station signals are relayed and transmitted, and the switch must remain on. That is, continuously maintaining the activation state for the period t2 to t3 as described above is a no-signal period that occurs in a short period for relaying the signal through the down / uplink signal path, for example, a downlink for which the signal path is switched. Even when the signal is frequently cut off when switching from uplink to uplink, downlink or during signal transmission, if the service area is in the shadow area, the switch keeps activating operation so that the switching operation is stable. To be performed.

However, there is a limit to delay the downlink switchoff delay time, which is the time when the switch is changed from the active state to the disconnected state. The reason for this is that when uplink switching is completed in the process of switching from the active state to the disconnected state, a certain time is required for monitoring the signals of the downlink path by directly returning the downlink and the uplink to the initially set state. to be. Such a time monitoring time is called a waiting period, which is detected by monitoring the signal during the period t3 ~ t4 as shown in FIG.

Therefore, if the above switching time is excessively delayed from the activation state to the blocking state, the downlink signal detection unit 304 cannot be operated before the downlink input signal input time, so that the switching time of the service-side path switch 307 is reduced. Is set smaller than RTG (Rx / Tx Transition Gap) time, which is a time generated due to a delay gap in which a signal is switched to transmit / receive, so that switching operation can be stably performed.

On the other hand, when the downlink output side switch is turned off as described above, the downlink and uplink are immediately returned to the initially set state and are monitored during the waiting period t3 to t4 time which is a predetermined time for monitoring the signal input to the relay unit 300. While the terminal signal is generated in the service area along the uplink signal path while being input to the relay unit 300 and the terminal signal of the base station area is input to the relay unit 300 through the downlink signal path, the terminal signal is generated in the base station area. The terminal signal is delayed by the first delayer 303 by t4 to t5 time, which is the insertion delay period of the first delayer 303, and is detected at t5 time, while the terminal signal generated in the service area has a delay time. Since the uplink signal detector 309 is reached at time t4, it is detected. Therefore, since the uplink signal detector 309 is preferentially detected before the time at which the signal is detected by the downlink signal detector 304, the downlink signal path is blocked at time t3 while the uplink signal path is blocked at time t4. The path switches 301 and 307 on the donor side and the service side are switched to be turned on and activated.

As described above, when the service side path switch 307, which is the output side of the uplink, is activated in the on state, the uplink signal path is formed, and the service side path switch 307 continues in the on state for a period of time t4 to t6. Keep it. However, even in this case, when the signal path is switched from the downlink to the uplink signal path or from the uplink to the downlink, and the signal is frequently disconnected when the service area is in the shadow area during the relay transmission of the signal. In the case where the signal is generated and there is no signal time, the switch off delay period is set in the same manner as the t2 to t3 section so that the switching operation can be stably performed.

That is, the donor side or the service side route switch is detected by detecting the signal input by the two signal detectors 304 and 309 by the repeater 10 equipped with the first delayer 303 of the repeater of FIG. 5 according to the present invention. While 301 and 307 are in the state where the switching operation is activated in the uplink signal path, even if there is no signal, the switching operation is still present for a predetermined time, that is, during the t6 to t7 interval during the switch-off delay time. Engaged switches remain active.

Further, in addition to the above switching operation, according to the present invention, in the case of a downlink signal path, the second delay unit 305 of the relay unit 300 may provide the service by a signal detected by the downlink signal detector 304. After operating the side path switch 307, the terminal signal of the donor unit 100 is transmitted to the service side path switch 307 through the downlink path, that is, the downlink signal detection unit 304 is the service side path switch. 307 is transmitted to the downlink signal path to transmit a switch control signal so that the terminal signal of the base station area is transmitted to the service antenna 201 before the service side path switch 307 is activated to the downlink signal path. Since the terminal signal of the signal path is extinguished, delay the time so that the downlink signal path is activated after the service side path switch 307 is switched to the downlink signal path. Kinda.

In the case of the uplink signal path, the third delay unit 306 of the relay unit 300 operates on the same principle as the second delay unit 305. After operating the donor side path switch 301 according to the signal detected by the uplink signal detection unit 309, the terminal signal of the service unit 200 is transferred to the donor side path switch 301 through the uplink signal path. To be transmitted. That is, the uplink signal detection unit 309 transmits a switch control signal to the donor side path switch 301 to activate the uplink signal path so that the service area before the donor side path switch 301 is activated as the uplink signal path. Since the terminal signal of the uplink signal path is lost when the terminal signal of the uplink signal path is transmitted to the donor antenna 101, the time delay is delayed so that the uplink signal path is activated after the donor side path switch 301 is switched to the uplink signal path. . Accordingly, even when two terminal signals are present by the first delay unit 303 provided in the RF repeater of the present invention, the switching operation may be sequentially performed so that a collision does not occur between the two signals. 305 or the third delayer 310 can stably perform the switching operation without loss of signal data.

FIG. 7 illustrates an output waveform diagram of an overall path switch operated according to a change in an RF signal detected by a signal detection unit of the present invention. As shown in the figure, an output side path switch 301 of a downlink is formed such that a downlink signal path is formed. There is a short no-signal interval such as NS (No Signal) while it is active in the ON state. If the short no-signal section T _NS is less than the preset reference set time T _Deley , the current switch-on state is maintained to prevent any switching switching operation from occurring. Ensure that the signal is successfully relayed without loss.

Further, when the path of the signal is switched, i.e., when switching from the downlink signal path to the uplink signal path, the donor antenna 101 switches from the transmission of the signal to the reception, in which case TTG (Tx / A section of Rx Transition Gap is generated, while the service antenna 201 generates a section of Rx / Tx Transition Gap when the uplink signal is switched from reception to transmission. This phenomenon is generated by the same principle even in the uplink, and thus, the switching operation of the path switch occurs during the period in which the operation of the antennas 101 and 201 is switched from transmission to reception or reception to transmission. Therefore, in such a case, the switch-off delay time when the path switch is switched from the on state to the off state is smaller than that of the RTG time interval. That is, T _Deley <T _RTG .

The reason for limiting the switching on / off delay time T _Deley at the time of switching switching as described above is that the signal detectors 304 and 309 are newly inputted prior to the time when an arbitrary signal is input to the relay unit 300. This is because a minimum amount of time is required to monitor and detect the signal.

Therefore, even if the service area is a shadow area, the relay normally functions as a repeater without an error in switching operation or loss of data caused by excessive allocation of a switch on / off delay time during switching.

8 illustrates a relay control method of an RF repeater for TDD using RF signal detection time control and switching time control. The relay control method of the TDD RF repeater according to the path switching control operation using the switching on / off delay algorithm of the microcomputer control unit built in the down / uplink signal detectors 304 and 309 in the relay unit 300 of the present invention is as follows. Perform the same steps as

Input side path switches 301 and 307, in which signals received from the antennas 101 and 201 of the repeater 10 according to the present invention are input to the relay unit 300, are set to ON and signals from the relay unit 300 are turned on. The output side path switches 307 and 301 to be output are in the standby mode step S110 of being set to the off state, and the signals detected by the signal detectors 304 and 309 are detected by the signal detectors 304 and 309. As a result of the first signal judging step S120 for determining whether there is a signal and the signal judging result of the first signal judging step S120, when signals are detected by the signal detectors 304 and 309, an output side path switch for outputting the signal ( A path activation step (S130) for activating the signal path by switching the 307, 301 from the off state to the on state, and as a result of the signal determination in the first signal determination step (S120), the signal is detected by the signal detection unit (304, 309). If not detected, the signal detection step S120 is repeated until a signal is detected. The signal detection unit 304 or 309 receives a signal input to the relay unit 300 while the output step path switch 307 or 301 is kept on after the step S131 and the path activation step S130 are continued. The second signal judging step (S140) and the second signal judging step (S140) to continuously determine whether there is a signal by performing the operation to detect by the signal detection unit (304, 309) If is not detected, the delay time count step (S150) of driving the off delay timers of the signal detectors 304 and 309 to count the off delay time, and the signal determination result and signal detector of the second signal determination step (S140). When a signal is detected at 304 and 309, performing the second signal determination step S140 until no signal is detected (S151) and sending the signal to the relay unit 300 while driving the off delay timer. The signal detected by the signal detectors 304 and 309 When the signal is detected by the signal detection unit 304 or 309 as a result of the signal determination step S160 of detecting the signal and continuously determining whether there is a signal and the signal determination result of the third signal determination step S160, The time comparison step (S170) of comparing the preset off delay time and the counted off delay time, and the signal detection result of the third signal determination step (S160), when the signal is detected in the signal detection unit (304, 309) is turned off After performing the timer reset step of resetting the delay timer to an initial value, performing the second signal determination step (S140) (S171), the time comparison result of the time comparison step (S170), and a preset off delay If the counted off delay time is greater than the time, the timer reset step (S180) of resetting the off delay timer to an initial value and the time comparison result of the time comparison step (S170), and the counted off compared to the preset off delay time If the time period is short, the step S181 of performing the third signal determination step S160 and the output side path switches 307 and 301 for outputting a signal after performing the timer reset step S180 are turned on. After performing the step of switching to the off state (S190), the standby mode step (S110) is performed.

Each step of the relay control method of the TDD RF repeater according to the path switching control operation using the switching on / off delay algorithm of the microcomputer control unit built in the down / uplink signal detection unit 304, 309 as described above in detail Is as follows.

As a first step, the input side path switches 301 and 307 through which the signals received from the antennas 101 and 201 of the repeater 10 according to the present invention are input to the relay unit 300 are set to the ON state and the relay unit ( The standby mode step S110 in which the output side path switches 307 and 301 in which the signal is output from 300 is set to the off state will now be described.

That is, when the repeater 10 is reset or initially started, the input side path switches 301 and 307 are set to the on state so that the signal received from the antennas 101 and 201 of the repeater 10 is input to the repeater 300. The output side path switches 307 and 301 for outputting signals from the relay unit 300 are set to the off state. That is, in the case of the downlink signal path, the donor side path switch 301 on the input side is turned on and the service side path switch 307 on the output side is off. On the other hand, in the case of the uplink signal path, the service side path switch 307 on the input side is set to the on state, and the donor side path switch 301 on the output side is off. As described above, the initial reset step of waiting for the signal detected by the signal detectors 304 and 309 while the input side path switches 301 and 307 are engaged is automatically set. In addition, when the repeater 10 transmits all the input signals smoothly and completes the relay, the repeater 10 automatically switches to the initial state as described above.

As a second step, the first signal determination step S120 for detecting the presence of the detected signal by detecting the signal input to the relay unit 300 by the signal detectors 304 and 309 will be described below. .

That is, since the donor antenna 101 is installed in the base station area in the case of the downlink signal path, both the base station signal and the terminal signal generated in the base station area are received, whereas in the case of the uplink signal path, the service antenna is received. Since 201 is installed in the service area (or the shaded area), only the terminal signal generated in the service area is received.

As described above, in the repeater 10 of the present invention, three types of signals are generated, and in each case, first, the base station or terminal signal generated in the base station area from the donor antenna 101 to the service antenna 201 will be described. In case of transmission, the donor side path switch 301 is set as the downlink signal path, and the signal input and relayed to the relay 300 is monitored and detected by the downlink signal detector 304, and the detected signal exists. In response, the service side path switch 307 is switched from the off state to the on state by the switching control operation of the downlink signal detection unit 304 so that the downlink signal path is activated.

In addition, when the terminal signal is received from the service antenna 201, the service-side path switch 307 services the uplink signal path to be formed while being kept in the ON state as initially set as in the standby mode step S110. The terminal signal, which relays the signal from the antenna 201 to the donor antenna 101, is input to the relay unit 300 and monitored and detected by the uplink signal detector 309 to determine that the detected signal is present. The donor side path switch 301 is turned on from the off state, that is, switched from the downlink signal path to the uplink signal path and activated by the switching control operation of the signal detection unit 309. Monitor and detect.

However, when only the base station signal or one terminal signal occurs as described above, the operation of the repeater 10 does not cause a big problem. However, the service signal of the terminal in the service area is transmitted from the service antenna 201 to the donor antenna 101. If the terminal signal of the base station area is also detected by the donor antenna 101 during the relay transmission, the terminal signal of the base station area and the terminal signal of the service area, that is, two signals collide with each other, and thus the repeater does not operate normally. That is, any one of the two signals must be delayed to achieve a smooth relay process. In the present invention, even when two signals are simultaneously input to the relay unit 300 as shown in FIG. Delaying the transmission time of the signal transmitted through the downlink signal path by the first delay unit 303 provided on the downlink path. Therefore, since the terminal signal of the base station area relayed along the downlink signal path by the first delayer 303 is delayed, the terminal signal generated in the service area is first monitored and detected by the uplink signal detector 309. In response to determining that the detected signal exists, the donor side path switch 301 is switched from the initially set downlink signal path to the uplink signal path by the switching control operation of the uplink signal detection unit 309, so that the terminal signal of the service side is first transferred. The donor side path switch 301, which is reset to the initial state after the relay transmission, is switched from the uplink to the downlink signal path and relays the terminal signal generated in the base station area to the service side through the downlink signal path.

In addition, when there is a signal received from the antenna 101, 201 of the repeater 10 of the present invention and input to the relay unit 300, the down / uplink signal detector 304, 309 detects the signal and the signal is Although it determines that there is a switching control operation, on the other hand, when there is no signal received from the antennas 101 and 207, that is, no signal, the down / uplink signal detectors 304 and 309 detect any signal. It does not perform any switching control operation.

As a third step, when a signal is detected by the signal detectors 304 and 309 as a result of the signal determination in the first signal determination step S120, the output side path switches 307 and 301 for outputting the signal are turned on. Referring to the path activation step (S130) to switch to the state to activate the signal path as follows.

That is, since the signals are received from the antennas 101 and 201 and input to the relay unit 300, the down / uplink signal detectors 304 and 309 provided on the downlink or uplink signal paths detect the signals. In order to detect a signal input to the relay 300 and relayed during monitoring, it is determined that a signal exists and is determined by the switching control operation of the microcomputer controller provided in the down / uplink signal detectors 304 and 309. In the case of the downlink signal path, the service side path switch 307 on the output side is switched from the off state to the on state to activate the downlink signal path, while in the case of the uplink signal path, the donor side path switch 301 on the output side. ) Is activated by switching from off state to on state. In both cases, the second or third delay delays a signal transmitted along the down / uplink signal path by the time required to operate the output side path switches 301 and 307 of the down / uplink signal detectors 304 and 309. Delayed by the groups 305 and 306.

That is, in the case of the downlink signal path, the downlink signal detector 304 transmits a switch control signal to activate the service side path switch 307 from the uplink to the downlink signal path so that the service side path switch 307 is down. If the base station (or terminal) signal of the base station area is transmitted to the service antenna 201 before being activated by the link signal path, the service side path switch 307 is down because the support station (or terminal) signal of the downlink signal path is lost. After switching and switching to the link signal path, the downlink signal path is activated so that the signal of the transmission signal is transmitted by a second delayer 305 provided on the downlink path to relay the signal of the base station area to the service area without loss of the signal. The time is delayed.

In the case of the uplink signal path, the uplink signal detector 304 transmits a switch control signal to activate the donor side path switch 301 from the downlink to the uplink signal path so that the donor side path switch 301 is up. If the terminal signal of the service area is transmitted to the donor antenna 101 before being activated by the link signal path, the terminal signal of the uplink signal path is extinguished and thus the donor side path switch 301 is switched to the uplink signal path and switched. After the uplink signal path is activated, the time of the transmission signal is delayed by the third delayer 310 provided on the uplink path so that the terminal signal of the service area is relayed to the base station area without loss of the signal.

On the other hand, if a signal is not detected by the signal detectors 304 and 309 as a result of the signal determination of the first signal determination step S120, performing the signal detection step S120 until the signal is detected (S131). In this case, since no signal is received by the antennas 101 and 201, that is, the signal is a non-signalless signal, the downlink for relaying the signal input to the relay unit 300 is transmitted. Alternatively, since the uplink does not need to be set, the signal detection step is performed until the signal is detected and the signal path is activated while maintaining the initial state without switching the path switches 301 and 307 on the output side initially set ( S120) is repeated.

As a fourth step, the signal detection unit 304, 309 detects a signal input to the relay unit 300 while the output side path switches 307 and 301 remain on after the path activation step S130. Referring to the second signal determination step (S140) to continuously determine the presence of the signal by performing the operation as follows.

That is, in the case of the downlink, the signal input to the relay unit 300 is transmitted to the downlink signal detector 304 while the service-side path switch 307 is kept on after the path activation step (S130). It performs the operation to detect the presence of the signal to continuously determine the existence of the signal.

On the other hand, in the case of the uplink, the uplink signal detector 309 receives a signal input to the relay unit 300 while the donor side path switch 301 is maintained in the on state after the path activation step (S130). It performs the operation of detecting by to continuously determine the presence of a signal.

Therefore, in the step (S140), if the signal is not detected while the path switches 301 and 307 are fastened and the downlink or uplink path is fastened, there is no need to activate the downlink or uplink signal path any more. By resetting the output side path switches 301 and 307 back to the initial state to detect the next received signal and fastening the signal path suitable for the signal. The signal detectors 304 and 309 continuously monitor and detect the signal. Performs an operation to determine the existence of the.

As a fifth step, if a signal is not detected by the signal detectors 304 and 309 as a result of the signal determination in the second signal determination step S140, the switch delay is driven by driving the off delay timers of the signal detectors 304 and 309. The delay time counting step (S150) for counting time is described as follows.

In other words, if a signal is not detected by the signal detectors 304 and 309, the signal detectors 304 and 309 are determined to be no signal and the signal detectors 304 and 309 are switched to the initial set state without the need to activate the signal path any more. ) of the driving-off delay timer Programs stored in the microcomputer control unit which counts the T _timer switch-off delay time.

The reason for driving the off delay timer as described above is that in the case of the conventional repeater, TTG (Tx / Rx Transition Gap) is generated or RTG (Rx / Tx Transition Gap) is generated and an error occurs in the switching operation of the path switch. In order to prevent the data loss, the switching operation is maintained even in the no-signal period without a signal. That is, the T- _timer , which is a switch-off delay time, is counted for the reference time T _D time. This is to stabilize the switching by activating the signal path state by continuously maintaining the current switching operation state.

However, there is a limit as described above with reference to FIGS. 6 and 7 to delay the time that the switch is switched from the activated state to the disconnected state as described above.

For example, if no signal is detected while the uplink signal path is formed and there is no signal, the switching switching operation should be performed without maintaining the current signal path. Alternatively, when the signal relaying process is completed after performing the uplink signal path, the switching operation is switched from the active state to the disconnected state and immediately returns to the initially set switching state. In order to perform the signal detection step, excessively delaying the switching time from the activated state to the cutoff state, since another signal received from the antennas 101 and 201 cannot be input to the relay unit 300. wherein a reference setting time T is _Deley-off delay time is smaller than the _{T RTG RTG (Rx / Tx Transition} Gap) time It should be appointed.

As a result of the signal determination of the second signal determination step S140, when a signal is detected by the signal detection units 304 and 309, the second signal determination step S140 is repeatedly performed until no signal is detected (S161). ) Is as follows.

That is, since the signal is continuously detected by the signal detectors 304 and 309 so that the signal exists, in this case, the second signal is maintained until the signal is no signal while maintaining the current switching state. If the signal is not detected by performing the determination step (S140), it is determined that there is no signal and counts the off delay time and sets the switching operation to the initial state when the set time is exceeded.

As a sixth step, a third signal determining step of continuously detecting whether a signal is present by detecting a signal input to the relay unit 300 while driving the off delay timer is detected by the signal detectors 304 and 309 ( S160) will be described below.

That is, the signal detection unit 304, 309 detects another signal input to the relay unit 300 during the time for driving the off delay timer program, and continuously determines whether a signal is present. If the other signal received in step 201 is input and detected, the off delay time timer counted so far is terminated. If the signal is not detected while the off delay timer program is being driven, the off delay timer driving time and The following operation compares the set delay time.

As a seventh step, a time comparison step of comparing a preset delay time and a counted off delay time when a signal is not detected by the signal detection units 304 and 309 as a result of the signal determination in the third signal determination step S160 (S170). ) Is as follows.

That is, if the signal is not detected by the signal detectors 304 and 309, the signal is a non-signal-free signal. Therefore, the off delay timer program is driven in the delay time counting step S150, and the switch off delay time and the preset delay counted. Compare the time.

On the other hand, when a signal is detected by the signal detectors 304 and 309 as a result of the signal determination in the third signal determination step S160, the second signal is performed after performing a timer reset step of resetting the off delay timer to an initial value. The step S171 of performing the determination step S140 will now be described.

That is, when a signal is detected by the signal detectors 304 and 309, this is a case in which a signal is present. Thus, a signal received from the antennas 101 and 201 is input to the relay unit 300 to switch the switching state which is a signal path state currently in progress. Since there is no need for any switching switching in order to continuously transmit and relay the input signal, the second signal determination step (S140) is performed without counting the off delay time by resetting the off delay timer program to an initial value and ending. ).

As a fourth step, a timer reset step (S180) of resetting the off delay timer to an initial value when the switchoff delay time counted compared to the preset off delay time as a result of the time comparison of the time comparison step (S170) will be described. Is as follows.

That is, when the signal is non-signal interval no switching operation in the other words maintaining the status quo, and to count the switch-off delay time T _Timer Compare Based on the set time of T _Deley, T _Timer> when conditions, such as T _Deley has Since the signal relaying process is completed through the downlink or uplink signal path, the switching operation is switched from the active state to the disconnected state, and the standby mode step for immediately returning to the initially set switching state and for monitoring and detecting the next generated signal In order to perform the signal detection step, excessively delaying the switching time from the activated state to the cutoff state, since another signal received from the antennas 101 and 201 cannot be input to the relay unit 300. and the switch-off delay time of T _Timer is based on set time that is set to be smaller than the _{T RTG RTG (Rx / Tx Transition} Gap) time T is less than _Deley time.

On the other hand, when the time comparison result of the time comparison step (S170), the off delay time is less than the preset off delay time is described in the step (S181) to perform the third signal determination step (S160) As follows.

That is, if it is not a condition such as T _Timer > T _Deley as described above, it is determined that the signal is temporarily not detected, and it is determined whether there is a signal that is next inputted and relayed by the signal detectors 304 and 309. Perform the process.

As a ninth step, after performing the timer reset step (S180), the standby mode step (S190) is performed after switching the output side path switches 307 and 301 from which signals are output from the on state to the off state (S190). Referring to the process of performing (S110) as follows.

That is, after resetting the off delay timer program and ending, the output side path switches 301 and 307 for outputting a signal are controlled to be switched from an on state to an off state, thereby automatically resetting to an initial state as in the standby mode step (S110). After performing the standby mode step of switching the signal input to the relay unit 300, the first signal determination step of detecting the presence of the signal is performed by detecting the signal.

Therefore, although the service area is a shaded area by the relay control method of the TDD RF repeater according to the path switching control operation using the switching on / off delay algorithm of the microcomputer control unit built in the down / uplink signal detectors 304 and 309. However, switching time control can be performed at a simple and accurate time without losing transmission data due to a path switch error.

Although the present invention has been described in detail so far, it should be apparent that the embodiments mentioned in the process are only illustrative, and not restrictive, and the present invention is provided by the following claims. Within the scope not departing from the scope of the present invention, changes in the components that can be coped evenly will fall within the scope of the invention.

As described above, in the present invention, when a signal received from an antenna is input to a relay unit, a signal detection unit for detecting an input signal and switching and controlling a signal path according to the detected signal and a transmission time of the signal at the front end of the signal detection unit Since it has a delay to delay the time, it is economically inexpensive because a complicated configuration such as a separate synchronous detection module for determining the switch time is unnecessary, and the switch on / off delay algorithm according to the present invention when the service area is a shadow area The switching method can control switching time at a simple and accurate time, and switching is performed without loss of signal data by sequentially performing switching operations so that no collision occurs between two signals even when two terminal signals exist. Stable operation And it is.

Claims (5)

A donor unit 100 installed in the base station area and receiving a signal of the base station area or transmitting a signal of the service area to the base station area, and a service area installed in the service area and receiving a signal of the service area or transmitting a signal of the base station area to the service area. Relaying the signal received from the service unit 200 and the donor unit 100 to the service unit 200 or relaying the signal received from the service unit 200 to the donor unit 100. In the repeater 10 consisting of a repeating unit 300, The relay unit 300 detects the input signal on the downlink signal path for relaying and transmitting the signal received by the donor unit 100 to the service unit 200 so that the downlink is set up. A downlink signal detector 304 for controlling switching of the path switch 307; Switching the donor side path switch 301 so that the uplink is set by detecting the input signal on the uplink signal path for relaying and transmitting the input signal received from the service unit 200 to the donor unit 100. An uplink signal detector 309 for controlling; And The downlink signal detector 304 detects the terminal signal of the service area by the uplink signal detector 309 and detects the downlink signal detector 304 at the front end of the downlink signal detector 304 so that the uplink signal path is activated first. An RF repeater for TDD using RF signal detection time control and switching time control, characterized in that it comprises a first delayer (303) for delaying the time for the terminal signal in the base station area. The donor unit 100 of claim 1, further comprising a donor unit 100 located at a rear end of the downlink signal detector 304 and operating the service-side path switch 307 by a signal detected by the downlink signal detector 304. After the second delayer 305 and the uplink signal detection unit 309 delaying the time of the donor unit 100 signal so that the signal of the signal is transmitted to the service side path switch 307 through the downlink path. Located at the end and operating the donor side path switch 301 according to the signal detected by the uplink signal detection unit 309, the signal of the service unit 200 passes through the donor side path through the uplink signal path. TDD RF relay using the RF signal detection time control and switching time control further comprises a third delayer 310 for delaying the time of the service unit 200 signal to be transmitted to the switch 301 . The method according to claim 1 or 2, when the signal detection unit 304, 309 of the downlink or uplink detects a signal, an operation of activating the donor side or service side path switches 301, 307 is immediately performed, and a switching operation. The RF repeater for TDD using the RF signal detection time control and switching time control, characterized in that the switching operation is maintained for a predetermined time even when the signal is no signal when the signal is activated. Input side path switches 301 and 307, in which signals received from the antennas 101 and 201 of the repeater 10 are input to the relay unit 300, are set to ON and output side paths from which the signal is output from the relay unit 300. The switches 307 and 301 are set in an idle mode; A first signal determination step of detecting a signal input to the relay unit 300 by the signal detectors 304 and 309 to determine the presence or absence of the detected signal; As a result of the signal determination in the first signal determination step, when a signal is detected by the signal detectors 304 and 309, the output path switches 307 and 301 outputting the signal are switched from off to on to activate the signal path. A path activation step; After the path activation step, while the output side path switches 307 and 301 are kept in the on state, the signal detection unit 304 or 309 detects a signal input to the relay unit 300 and the presence or absence of a signal is present. Determining a second signal continuously; A delay time counting step of driving an off delay timer of the signal detection unit to count an off delay time if a signal is not detected by the signal detection unit 304 or 309 as a result of the signal determination in the second signal determination step; A third signal judging step of continuously detecting whether a signal is present by detecting a signal at a signal detection unit (304, 309) that is input to the relay unit while driving the off delay timer; A time comparison step of comparing a preset off delay time and a counted off delay time when a signal is not detected by the signal detection unit 304 or 309 as a result of the signal determination in the third signal determination step; A timer reset step of resetting the off delay timer to an initial value if the counted off delay time is greater than a preset off delay time as a result of the time comparison in the time comparison step; And RF signal detection time control after performing the timer reset step and performing the standby mode step after switching the output side path switches 301 and 307 from which signals are output from the on state to the off state And a relay control method of the RF repeater for TDD using switching time control. The method of claim 4, wherein if a signal is not detected by the signal detectors 304 and 309 as a result of the signal determination in the first signal determination step, the first signal determination step is performed until a signal is detected. As a result of the signal determination of the second signal determination step, if a signal is detected by the signal detection units 304 and 309, the second signal determination step is performed until no signal is detected. As a result of the signal determination in the third signal determination step, if a signal is detected by the signal detectors 304 and 309, the second signal determination step is performed after performing a timer reset step of resetting the off delay timer to an initial value. , The RF signal detection time control and switching time control are further performed if the counted off delay time is less than the preset off delay time as a result of the time comparison. Relay control method of using TDD RF repeater.

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