KR101094560B1 - Method and apparatus for TDD relay system with backward sleep mode function - Google Patents

Abstract

The present invention relates to a time division relay system having a reverse sleep function and a method thereof, and does not detect the power level of the entire frequency band signal used in the relay system, but rather from the uplink signal (reverse signal) from the mobile station. Detect the power level of uplink control symbols for ranging that is initially performed for call connection, so that reverse slip can be implemented with high reliability even in low level uplink signals. A time division relay system having a function and a method thereof are provided.
To this end, the present invention provides a time division relay system having a reverse sleep function, comprising: synchronization detection means for extracting synchronization for switching timing of a downlink signal and an uplink signal; Downlink signal relay means for relaying a downlink signal during downlink switching timing in accordance with the synchronization extracted by the synchronization detecting means; Uplink signal relay means for relaying an uplink signal during uplink switching timing in accordance with the synchronization extracted by the sync detection means; Power detection means for detecting a power level of an uplink signal relayed through said uplink signal relay means; And control means for detecting a power level of uplink control symbols for initial ranging from the power level detected by the power detecting means to proceed to a reverse sleep state or releasing a reverse sleep state. The control means detects a power level of the uplink control symbols for ranging that is initially performed among the power levels detected by the power detection means, thereby detecting a power level of a mobile station within a corresponding service coverage. If it is determined that the mobile station is not used, the high power amplifier for the uplink is controlled so that noise is not output to the base station.

Description

Time division relay system having reverse sleep function and its method {Method and apparatus for TDD relay system with backward sleep mode function}

The present invention relates to a time division relay system and a method thereof, and more particularly, in a time division relay system, a signal input from a mobile station to a relay system in synchronization with uplink timing when there is no user of the mobile station in service coverage (uplink). Signal and reverse signal) continuously monitor the presence and correct level, and implement the reverse sleep function through the implementation of reliable power level detection and fast reverse sleep release, blocking the output to the base station It can reduce unnecessary power consumption, according to the global policy of Green IT, and can improve the wireless quality of the reverse by reducing the degradation of the reverse wireless quality due to the use of multiple repeaters. A time division relay system having a reverse sleep function and a method thereof will be.

The present invention is derived from the research conducted as part of the original technology development project of the information and communication industry of the Ministry of Knowledge Economy [Task management number: 2007-S-029-03, Task name: Development of home / company WiBro system technology].

Recently, in the mobile communication service, the relay system, unlike the early days used for resolving shadow areas, is essential for securing coverage as well as resolving shadow areas. Therefore, mobile communication providers are actively considering the introduction and operation of the relay system from the initial network design stage, and in fact, many mobile communication relay systems have been introduced to provide mobile communication services. In addition, mobile communication providers not only in Korea but also in other countries around the world are actively participating in the introduction and development of the relay system. Therefore, the implementation technology of the relay system is also developing a lot.

In the development and introduction of many mobile communication relay systems, mobile carriers have recently made great efforts to improve wireless quality and save energy according to the global IT green strategy.

In addition, when several to several dozen repeaters are operated in the same base station coverage, the inflow of uplink path noise of the base station increases according to the number of operations of the relay system, which affects the reverse radio quality and coverage of the base station.

Accordingly, the reverse sleep function is implemented in the relay system of the mobile communication service (for example, CDMA, W-CDMA, etc.) of the frequency division scheme (FDD scheme).

Recently, as a time division (TDD) wireless communication service such as a portable Internet service (also called a WiBro service) is started, a reverse sleep function is partially implemented in a time division relay system. For example, Korean Patent Application Publication No. 10-2006-0123023 (Relay device that minimizes power consumption and extends the operation period in a time division system).

The prior art (Korean Patent Laid-Open Publication No. 10-2006-0123023) relates to a relay apparatus that implements a sleep mode function in a time division (TDD) type wireless communication relay apparatus using a bidirectional single frequency between a base station and a mobile station. Relay device that checks the communication status between the mobile station and the mobile station and adaptively controls the operation state of the time division switching means and power supply means of the relay system according to the result. It is about.

To this end, the time-division repeating apparatus of the prior art includes a first means for detecting a signal for determining the communication presence of a mobile station in a service area from a reverse input signal through an antenna, and in the relay apparatus according to the communication presence of the mobile station. And second means for organically controlling the operation of the time division switching means and / or power supply means.

In this case, the first means includes a first coupler for coupling a reverse input signal from an antenna; A first signal limiter which blocks a signal above a predetermined reference level among the output signals from the first coupler and passes a signal below the reference level; And a first power detector for detecting and outputting the intensity of the signal passing through the first signal limiter, wherein the second means analyzes the detection signal from the first power detector to analyze the detected signal from the first power detector. And control means for organically controlling the operation state of the time division switching means and / or signal amplification means in the relay apparatus according to the determination result.

As described above, the time-division repeating apparatus of the prior art obtains the correct synchronization timing of the time-division switch from the forward input signal, and determines whether the mobile station in the service area of the repeater is in communication with the reverse input signal, and thus the repeater sleeps. Therefore, the longevity of the time division switch can be extended, power consumption can be minimized, and synchronous timing can be stabilized.

However, the above-described conventional techniques (a technique of implementing reverse sleep function in a frequency division relay system and a technique of implementing a reverse sleep function in a time division relay system) measure and implement levels of continuous mobile station signals in a reverse frequency band. In addition, since it operates with the total power level of the entire frequency band in use, there is a problem that can be operated only when a rather high level mobile station signal is input for reliable operation. It is a subject of the present invention.

Accordingly, the present invention does not detect the power level of the entire frequency band signal used in the relay system, but rather uplinks for ranging that is initially performed for call connection among uplink signals (reverse signals) from the mobile station. Provided are a time division relay system having a reverse sleep function and a method thereof, by detecting a power level of a control symbol to implement a reliable reverse sleep function even in a low level uplink signal. There is a purpose.

That is, the present invention includes a synchronization detection module (Sync Detection Module) inside the time division relay system to ensure synchronization, and based on the obtained synchronization to switch the downlink and uplink within the repeater, and switching the switching signal Detect the power level of the uplink control symbols for ranging initially performed for the call connection of the mobile station among the uplink signals (reverse signals) input to the relay system at the uplink timing as a reference. In addition, the present invention provides a time division relay system having a reverse sleep function and a method thereof, which can realize a reliable reverse sleep function even in a low level uplink signal, thereby improving reverse radio quality and reducing power consumption. There is a purpose.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

A system of the present invention for achieving the above object comprises: a time division relay system having a reverse sleep function, comprising: synchronization detection means for extracting synchronization for switching timing of a downlink signal and an uplink signal; Downlink signal relay means for relaying a downlink signal during downlink switching timing in accordance with the synchronization extracted by the synchronization detecting means; Uplink signal relay means for relaying an uplink signal during uplink switching timing in accordance with the synchronization extracted by the sync detection means; Power detection means for detecting a power level of an uplink signal relayed through said uplink signal relay means; And control means for detecting a power level of uplink control symbols for initial ranging from the power level detected by the power detecting means to proceed to a reverse sleep state or releasing a reverse sleep state. The control means detects a power level of the uplink control symbols for ranging that is initially performed among the power levels detected by the power detection means, thereby detecting a power level of a mobile station within a corresponding service coverage. If it is determined that the mobile station is not used, the high power amplifier for the uplink is controlled so that noise is not output to the base station.

On the other hand, the method of the present invention for achieving the above object, the method of the reverse sleep mode operation in a time division relay system, power detection step of detecting the power level of the uplink control symbols (Control Symbols) in the uplink signal; A reverse sleep state canceling step of releasing a reverse sleep state when the power level detected in the power detection step exceeds a preset reverse sleep reference level; And a reverse sleep state switching step of switching to a reverse sleep state when the power level detected in the power detection step is equal to or less than the preset reverse sleep reference level.

At this time, the reverse sleep state switching step, the power level detected in the power detection step is switched to the reverse sleep state as the predetermined reverse sleep reference level or less for a predetermined holding time or more.

In the reverse sleep state canceling step, the reverse sleep state is immediately released as the power level detected in the power detection step exceeds the predetermined reverse sleep reference level at least once.

The present invention as described above does not detect the power level of the entire frequency band signal used in the relay system, but performs ranging that is initially performed for call connection among uplink signals (reverse signals) from the mobile station. Detecting the power level of the uplink control symbols for the control (Detect), there is an effect that can implement a reliable reverse sleep function even in the low-level uplink signal.

That is, the present invention includes a synchronization detection module (Sync Detection Module) inside the time division relay system to ensure synchronization, and based on the obtained synchronization to switch the downlink and uplink within the repeater, and switching the switching signal Detect the power level of the uplink control symbols for ranging initially performed for the call connection of the mobile station among the uplink signals (reverse signals) input to the relay system at the uplink timing as a reference. In addition, high-reliability reverse sleep can be achieved for low-level uplink signals, resulting in improved reverse radio quality and reduced power consumption.

1 is a configuration diagram of an embodiment of a time division relay system having a reverse slip function according to the present invention;
FIG. 2 is a diagram for describing a process of detecting power levels of three uplink control symbols;
3 is a frame structure diagram of a mobile Internet service (WiBro service);
4 is a flowchart illustrating a reverse sleep mode operation method in a time division relay system according to the present invention;
5 is an operation timing diagram of a time division relay system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above 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, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

And throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between. Also, when a component is referred to as " comprising "or" comprising ", it does not exclude other components unless specifically stated to the contrary .

1 is a configuration diagram of an embodiment of a time division relay system having a reverse slip function according to the present invention.

1, a time division relay system having a reverse sleep function according to the present invention includes a first band pass filter 100, a first RF switch 110, a first low noise amplifier 120, and a synchronization detection module ( SDM: Sync Detection Module (130), frequency converter (140), first high output amplifier (150), second band pass filter (200), second RF switch (210), second low noise amplifier ( 220), the second high power amplifier 230, the monitoring and control unit 300, and the power supply unit 310 is made up.

Here, a detailed configuration of the frequency converter 140 will be described with reference to FIG. 1. The frequency converter 140 includes a third RF switch 141, a first mixer 142, a surface acoustic wave filter 143, Power Detect 144, Second Mixer 145, Fourth RF Switch 146, and Phase Locked Loop (PLL) to detect power of Uplink Control Symbols 147).

As shown in Fig. 1, in the time division relay system having a reverse sleep function according to the present invention, switching timing of a downlink signal (a signal transmitted from a base station to a mobile station) and an uplink signal (a signal transmitted from a mobile station to a base station) A synchronization detection module 130 for extracting synchronization for the downlink signal, and a downlink signal relay unit 100 for relaying downlink signals (forward signals) during downlink switching timing according to the synchronization extracted by the synchronization detection module 130. To 120, 140, 150, 210, and 200, and uplink signal relays 200 to 220 for relaying uplink signals (reverse signals) during uplink switching timing according to the synchronization extracted by the synchronization detection module 130. A power detector 144 for detecting a power level of an uplink signal relayed through the uplink signal relays 200 through 220, 140, 230, 110 and 100;Detecting the power level of the uplink control symbols for ranging initially performed for the call connection of the mobile station among the power levels detected by the previous power detector 144 to detect the power level of the mobile station within the corresponding service coverage. Supervision and control unit for controlling the control so that the noise is not output to the base station by turning off the second high power amplifier 230 for the uplink when it is determined that the mobile station is not being used. 300).

Next, referring to the downlink path of the time division relay system having the reverse sleep function according to an embodiment of the present invention, the downlink signal input from the base station is filtered by the first band pass filter 100 and then the first RF. The low noise amplification is performed in the first low noise amplifier 120 via the downlink path at the switch 110. The low noise amplified downlink signal is input to the frequency converter 140 via the synchronization detection module 130. At this time, the synchronization detection module 130 processes the input downlink signal by DSP (Digital Signal Processing) to detect a synchronization signal required for downlink switching and uplink switching, and transmits it to the monitoring and control unit 300. The frequency converter 140 combines the input downlink signal with the signal from the PLL 147 in the first mixer 142 through the downlink path of the third RF switch 141 to the intermediate frequency IF. Down-conversion, the filter is filtered by a high selectivity through the surface acoustic wave filter 143 and transmitted to the second mixer 145. The second mixer 145 then combines the downlink signal and the signal from the PLL 147 to upconvert to the original RF signal. The uplinked downlink signal is input to the first high power amplifier 150 through the downlink path of the fourth RF switch 146. Then, the first high output amplifier 150 amplifies the input downlink signal to a high output and transmits it to the mobile station through the second RF switch 210 and the second band pass filter 200.

Next, referring to the uplink path of the time division relay system having the reverse sleep function according to an embodiment of the present invention, the uplink signal input from the mobile station is filtered by the second band pass filter 200 and then the second RF. The low noise amplification of the second low noise amplifier 220 via the uplink path at the switch 210 is input to the frequency converter 140. Then, the frequency converter 140 combines the input uplink signal with the signal from the PLL 147 in the first mixer 142 through the uplink path of the third RF switch 141 to generate an intermediate frequency IF. Down-convert to, and filter the high selectivity through the surface acoustic wave filter 143 to the second mixer 145. At this time, some of the uplink signals passing through the surface acoustic wave filter 143 are coupled to the power detector 144. The power detector 144 then detects the power level of the uplink signal to implement the reverse sleep function. At this time, the power detector 144 can monitor the signal of the repeater uplink input level of at least -95dBm, and outputs the power level of the entire service frequency band to the direct current (DC) of the time axis and the power level axis. The second mixer 145 combines the uplink signal and the signal from the PLL 147 and up-converts the original RF signal. The upconverted uplink signal is input to the second high output amplifier 230 through the uplink path of the fourth RF switch 146. Then, the second high output amplifier 230 amplifies the input uplink signal to a high output and transmits the signal to the base station through the first RF switch 110 and the first band pass filter 100. In this case, the second high output amplifier 230 controls the gate bias power of the high output amplifier itself according to the control signal from the monitoring and control unit 300, thereby turning on / off the high output amplifier according to the reverse sleep function operation. / Off) function.

And monitoring and controlling the power supply unit 310 for supplying power to the time division relay system according to the present invention by converting AC power from the outside into direct current (DC) power source, and the time division relay system according to the present invention. There is a monitoring and control unit 300 for. The monitoring and control unit 300 includes a central processing unit (CPU) and a field programmable gate array (FPGA), and implements a monitoring and control function for operating a time division relay system and implements a reverse sleep function. It plays a role in handling the process. This will be described later in detail with reference to FIGS. 2 and 4.

FIG. 2 is a diagram for describing a process of detecting power levels of three uplink control symbols.

As shown in FIG. 2, the monitoring and control unit 300 detects the power level only for a time corresponding to three uplink control symbols among the power levels detected by the power detector 144. In this case, the three uplink control symbols are uplink control symbols for ranging initially performed for the call connection of the mobile station.

In general, a mobile internet service (WiBro service) undergoes an initial ranging process for wireless communication. When detecting an entire uplink signal, sampling is performed according to the presence or absence of data. Because the total value is different, it is impossible to operate in reverse sleep mode correctly. However, when only three uplink control symbols are sampled and considered for initial ranging, as shown in FIG. 2, there are no uplink signals after the three uplink control symbols. As can be considered, the power level is detected using the average value of the uplink signal corresponding to the three uplink control symbols, and the time after the three uplink control symbols is not taken into account.

A typical power level detection algorithm samples the entire interval (full frequency band) to find the overall average value, and when the overall average value is below a certain level, it operates in reverse sleep mode, but in this case initial ranging In this process, the overall average value is lowered, and the function of waking in the reverse sleep mode cannot be implemented. This is because, when averaging the entire interval, the power level average detected at initial ranging is close to the noise level.

As described above, the time division relay system of the present invention continuously monitors the presence and the correct signal level of a signal (uplink signal) input from the mobile station in synchronization with the uplink timing according to the switching timing due to the nature of the time division scheme, and the wireless environment. Considering this, it implements a reliable power level detection even at a low input level signal, and ensures that the reverse slip release operation time due to the use of the mobile station is fast within tens of ms after the reverse sleep operation.

That is, the present invention continuously monitors the presence and the correct signal level of the signal input from the mobile station in synchronization with the uplink timing in the time division relay system, and detects the power level with high reliability even at a low input level signal in consideration of the wireless environment. By implementing the Power Level Detect and the reverse sleep function through fast reverse slip release operation, the uplink high power amplifier is turned off during the time when the mobile station is not used in repeater coverage to cut off the output to the base station. It can reduce unnecessary power consumption, thereby complying with Green IT strategy, which is a global policy issue, and improve backward radio quality by reducing degradation of reverse radio quality due to the use of multiple repeaters.

3 is a frame structure diagram of a portable Internet service, and illustrates a standard frame structure of a portable Internet service (WiBro service), which is a typical time division method.

Looking at the frame structure of the mobile Internet service with reference to Figure 3, the total frame time is defined as 5ms, the downlink time, the time for switching from the downlink to the uplink (TTG), uplink time, downlink in the uplink It consists of the time to switch to the link (RTG).

In this case, in order for a mobile station to make a call connection, a call connection is first made through a ranging process using three uplink control symbols, so that the subscriber uses a mobile Internet service. These three uplink control symbols are continuously output not only at the initial call connection but also at the time of transmission of data after the call connection.

At this time, the three uplink control symbols (Control Symbols) are each composed of 102.4us, forming a time axis of 102.4us x 3 uplink control symbols = 307.2us. Therefore, in order to implement the reverse sleep function, the reverse sleep function is operated by monitoring the signal levels of three uplink control symbols from the start time of the uplink interval to about 300us.

4 is a flowchart illustrating a reverse sleep mode operation method in a time division relay system according to the present invention.

In the present invention, the power detector 144 and the power for detecting the power level of the uplink control symbols of the mobile station signal (uplink signal) to determine whether the mobile station within the service coverage of the time division relay system is used. The algorithm of the present invention is performed in the monitoring and control unit 300 to perform substantial process processing based on the power level detected by the detector 144. At this time, the on / off of the reverse sleep function can be controlled according to the traffic volume in the service coverage of the time division relay system of the present invention, and when the reverse sleep function is off, it is related to whether the mobile station is used or not. Normal service is continuously performed without an operation. Hereinafter, an operation algorithm when the reverse sleep function is turned on will be described.

First, when the reverse sleep function is set to on (401), power levels (signal levels) of three uplink control symbols are detected among the uplink signals input to the repeater at the uplink switching timing ( 402).

Thereafter, the detected power level is compared with the preset reverse sleep reference level (403). If the detected power level exceeds the reverse sleep reference level, it is determined that there is a user using a mobile station and the second high power amplifier for uplink ( 230 to release the reverse sleep state and off the reverse sleep LED to indicate that the reverse sleep mode has been released (404), then the three uplink control symbols In operation 402, a power level of three uplink control symbols is detected and compared with a preset reverse sleep reference level.

On the other hand, when the comparison result 403, the detected power level is less than the predetermined reverse sleep reference level, the timer is operated to continue counting whether or not the reverse sleep reference level is below the predetermined holding time (405), and continues in the reverse direction If it is below the sleep reference level, it is determined that there is no user using the mobile station in the service coverage of the corresponding time division relay system (406), so that the second high power amplifier 230 for the uplink is turned off to switch to reverse sleep and reverse sleep. The LED is turned on to indicate that the reverse sleep mode is set (407). Subsequently, the power levels of the three uplink control symbols are continuously detected and compared with the preset reverse sleep reference levels 402 and 403.

On the other hand, if the detected power level does not continue to be below the reverse sleep reference level for more than a predetermined holding time (406), the power level of three uplink control symbols is immediately detected and the preset reverse sleep is detected. The process is repeated from the comparison with the reference level (402 and 403).

5 is an operation timing diagram of a time division relay system according to an embodiment of the present invention.

An important timing related to the reverse sleep operation algorithm in the time division relay system according to the present invention will be described with reference to FIG. 5.

First, time division frame timing is obtained.

As shown in FIG. 5, the time-division type portable Internet service has a period T1 of a downlink timing section, a timing section for switching from downlink timing to uplink timing, uplink timing section, and uplink timing. It consists of a timing interval to switch to the downlink timing in. This frame timing acquisition process is performed in the sync detection module 130 of FIG.

The switching timing for switching the time division relay system is generated based on the obtained timing synchronization.

When the time division frame timing acquisition is performed, in order to perform the downlink and uplink switching operations of the time division relay system, the downlink further includes a start time and an end point based on the obtained frame timing of the downlink. A timing section T2 is set, and the remaining sections are set as an uplink timing section T3 to perform a switching operation in the time division relay system.

The timing for detecting the power level of control symbols in the uplink timing is as follows.

The time until the uplink start timing is calculated based on the switching timing of the time division relay system, and during the period T4 from the start point of the transmission of the uplink signal to the time when the three uplink control symbols are inputted. The power level of three uplink control symbol signals is measured.

The timing of releasing the reverse sleep state by turning on the second high power amplifier for the uplink by determining the presence of the mobile station user according to the power level detection result of the uplink control symbols is as follows. Is the same as

While operating in the reverse sleep state, the power level of three uplink control symbols is continuously detected and the detected power level is compared with the preset reverse sleep reference level to release the reverse sleep state if the reverse sleep reference level is higher than or equal to the preset reverse sleep reference level. Comparing time and process processing time required to turn on the second high output amplifier for uplink are as shown in "T5" of FIG.

As described above, the present invention has a synchronization detection module (Sync Detection Module) inside the time division relay system to secure synchronization, and based on the obtained synchronization to switch the downlink and uplink in the repeater, and the switching By detecting the signal level of the mobile station signal (uplink signal, reverse signal) input to the repeater only on the uplink timing based on the switching signal, an accurate uplink sleep function (reverse sleep function) is realized.

In addition, the present invention detects the power level of the full frequency band signal used at the relay system input for a reliable reverse sleep function operation at a low input level when detecting the signal level of the mobile station in the relay system. Rather than detecting the power level of the uplink control symbols for ranging that is initially performed for call connection among the mobile station signals, the reliability is achieved even at the low level reverse signal. High reverse sleep can be achieved.

Meanwhile, the present invention provides a reverse sleep function according to a temporary suspended state during use of the mobile station in order to minimize the effect on the service quality of the mobile station in the relay system service coverage when switching to the sleep state and implementing the reverse sleep function. In order to prevent switching, a relay system setting parameter is set to switch to reverse sleep when a signal of uplink control symbols from a mobile station is not detected continuously (e.g., the preset reverse sleep reference level value of FIG. 4). Determine if it is longer than the preset retention time).

On the other hand, in general, the timing of returning to the reverse sleep release state due to the use of the mobile station in the reverse sleep state is more important than the time of switching to the reverse sleep state. In this case, if the user does not return to the reverse sleep release state within a short time, the user takes a long time to connect to the relay system for use of the mobile communication service. Therefore, in the present invention, the timing of returning from the reverse sleep state to the reverse sleep release state due to the use of the mobile station is determined at least once regardless of the time for which the signal of the uplink control symbols from the mobile station is detected and maintained. When a signal of the uplink control symbols from is detected, it immediately returns to the reverse sleep release state.

In addition, the present invention as described above is not limited to the relay system of the portable Internet service (WiBro service), and can be applied to any time division relay system.

On the other hand, the reverse sleep mode operation method in the time division relay system according to the present invention as described above may be implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various permutations, modifications and variations are possible without departing from the spirit of the invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

The present invention can be used for a time division relay system and the like.

100: first band pass filter 110: first RF switch
120: first low noise amplifier 130: sync detection module (SDM)
140: frequency converter 141: third RF switch
142: first mixer 143: surface acoustic wave filter
144: power detector 145: second mixer
146: fourth RF switch 147: phase locked loop (PLL)
150: first high power amplifier 200: second band pass filter
210: second RF switch 220: second low noise amplifier
230: second high power amplifier 300: supervision and control unit
310: power supply

Claims (9)

delete In the time division relay system having a reverse sleep function,
Synchronization detecting means for extracting synchronization for switching timing of the downlink signal and the uplink signal;
Downlink signal relay means for relaying a downlink signal during downlink switching timing in accordance with the synchronization extracted by the synchronization detecting means;
Uplink signal relay means for relaying an uplink signal during uplink switching timing in accordance with the synchronization extracted by the sync detection means;
Power detection means for detecting a power level of an uplink signal relayed through said uplink signal relay means; And
And a control means for detecting a power level of uplink control symbols for initial ranging from the power level detected by the power detection means to proceed to a reverse sleep state or releasing a reverse sleep state. ,
Wherein,
Detecting the power level of the uplink control symbols for the initial ranging from the power level detected by the power detecting means to determine whether to use the mobile station within the corresponding service coverage to determine whether to use the mobile station. Time-division relay system that controls the high-power amplifier for the uplink if it is not used, so that no noise is output to the base station. The method of claim 2,
Wherein,
Time division relay system for detecting a power level using a power average value for a time corresponding to three uplink control symbols among the power levels detected by the power detection means.
The method of claim 3, wherein
Wherein,
Among the power levels detected by the power detecting means, a power level is calculated using an average value of power during a period from a start point of signal transmission of an uplink signal to a time point at which the three uplink control symbols are input. Time division relay system for detecting the level.
delete In the reverse sleep mode operation method in a time division relay system,
A power detection step of detecting a power level of uplink control symbols in the uplink signal;
A reverse sleep state canceling step of releasing a reverse sleep state when the power level detected in the power detection step exceeds a preset reverse sleep reference level; And
And a reverse sleep state switching step of switching to a reverse sleep state when the power level detected in the power detection step is equal to or less than the preset reverse sleep reference level.
The reverse sleep state transition step,
And switching to a reverse sleep state when the power level detected in the power detection step is equal to or less than the preset reverse sleep reference level for a predetermined holding time or more.
The method according to claim 6,
The power detection step,
And a power level is detected using an average power value during a time period corresponding to three uplink control symbols in an uplink signal.
The method of claim 7, wherein
The power detection step,
The reverse direction of detecting the power level using the average power value during the period from the start point of the signal transmission of the uplink signal to the time point at which the three uplink control symbols are inputted among the uplink signals. How sleep mode works.
The method according to any one of claims 6 to 8,
The reverse sleep state release step,
And a reverse sleep mode operation is immediately released as the power level detected in the power detection step exceeds the predetermined reverse sleep reference level at least once.

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