KR20090012400A - Method for sharing up link and downlink of wibro repeater using for time division duplex - Google Patents

Abstract

A upturn of a portable Internet relay using a TDD mode and a down link sharing method are provided to reduce generation heat by using high power amplifier for improving space by using modules inside the relay as single module. The signal received from a base station is received to a donor antenna(1) by being inputted to a first surge coupler BPF(Band Pass Filter)(2) of a first BPF(Band Pass Filter) part(16). The signal passing is input to the down-link switch LNA(Low Noise Amplifier) part(3). The predetermined amount of the downlink signal from the base station is coupled and the RF(Radio Frequency) signal is inputted to the SDM(Sync Detector Module)(14). If the signal is amplified to LNA of the down-link switch LNA part to the low noise, the first down-link switch LNA is off.

Description

Method for Sharing Up link And Downlink Of Wibro Repeater Using For Time Division Duplex}

1 is a diagram illustrating a repeater structure in which both a downlink and uplink path according to the prior art are configured and a signal transmission path in a repeater of a downlink;

2 is a diagram illustrating a repeater structure in which both the downlink and uplink paths according to the prior art are configured, and a signal transmission path in the uplink repeater;

3 is a diagram illustrating a repeater structure in which the downlink and uplink are configured as one path according to the present invention, and a signal transmission path in the repeater of the downlink;

4 is a diagram illustrating a repeater structure in which the downlink and uplink are configured as one path according to the present invention, and a signal transmission path in the repeater of the uplink;

** Symbols for Main Parts of Drawings **

1: donor antenna

2: first surge coupler BPF (Band Pass Filter)

3: Downlink Switch Low Noise Amplifier

4: first downlink switch LNA (Low Noise Amplifier) switch

5: second downlink switch LNA (Low Noise Amplifier) switch

6: downlink and uplink up / down converter section

6-1: High Speed Detector

7: High Power Amplifier

8: Highly Isolated RF (Radio Frequency) Switch

9: Uplink Switch Low Noise Amplifier

10: first uplink switch Low Noise Amplifier (LNA) switch

11: Second Up Link Switch Low Noise Amplifier (LNA) Switch

12: Second Surge Coupler Band Pass Filter

       13: service antenna 14: SDM (Sync Detector Module)

15: Main Control Unit

16: First Band Pass Filter (BPF)

17: Second Band Pass Filter (BPF)

The present invention is a repeater installed in a wireless access network for wireless portable Internet service refers to a repeater commonly used for the remaining parts of the downlink and uplink path except for a few parts, the existing downlink and uplink Compared to a repeater that uses both paths, the repeater is capable of functioning as a downlink and uplink in a single path, and thus, a repeater capable of reducing heat generation efficiency and cost.

1 is a diagram illustrating a repeater structure having both a downlink and uplink path according to the prior art and a signal transmission path in a repeater of the downlink, and FIG. 2 is a downlink and uplink path according to the prior art. Is a diagram showing a repeater structure in which all are constructed and a signal transmission path in an uplink repeater.

Referring to FIG. 1 and FIG. 2, there are two methods of separation between transmission and reception in communication: frequency division duplex (FDD) and time division duplex (TDD). FDD (Frequency Division Duplex) method is currently used in domestic mobile communication, and the transmission and reception are separated by using different frequencies.TDD (Time Division Duplex) method uses uplink and downlink frequencies. Is the same, but the time domain is divided by a specific time to distinguish transmission and reception for uplink and downlink.

The wireless mobile Internet uses a time division duplex (TDD) scheme that divides the separation between transmission and reception into a time domain and secures isolation between transmission and reception.

In this case, since the repeater of the conventional mobile communication method using the frequency division duplex (FDD) method has a different frequency between the transmission and reception, the transmission and reception are transmitted through two different paths. Therefore, the parts that go into the repeater are inevitably composed of two in pairs, so the cost, size, and calorific value of the repeater could not be reduced.

In addition, most of the repeaters for the existing wireless mobile Internet use the downlink and uplink both paths even if the time division duplex (TDD) method or the downlink and uplink are configured as a single path. For high system gain and high output power, accurate system design was not easy due to problems such as isolation between transmitter and receiver, noise figure, and saturation of input.

In addition, the separation method between the transmission and reception of the domestic mobile communication is made by the frequency division duplex (FDD) method, which is independent of the downlink and uplink transmission / reception paths, resulting in cost increase, size increase, and high heat generation. In most cases, the separation technology between the transmission and reception of a wireless portable Internet repeater using a TDD (Time Division Duplex) method has a structure in which transmission and reception are separate, that is, each composed of independent paths and FDD (Frequency Division Duplex). Had problems with the way.

The present invention has been made to solve the above problems, and even in the high gain of the repeater, high in order to ensure sufficient isolation between transmission and reception of the downlink and uplink. TID that provides stable operation in repeaters including RF (radio frequency) switch module that can have high isolation and high power switch control technology that can use both downlink and uplink with one high power amplifier It is an object of the present invention to provide a downlink and uplink sharing method of a portable Internet repeater.

In the sharing method of a portable internet repeater,

A surge coupler for lightning protection and a first surge coupler (BPF) for first band pass filter (BPF) 16 for band-passing; A second surge coupler 2BPF (Band Pass Filter) part 12;

The first surge coupler (BPF) 2 and the second surge coupler (BPF) 12 transmit a signal to a circulator for guiding a signal input in a specific direction. A first downlink switch Low Noise Amplifier (LNA) 4 and a first uplink switch Low Noise Amplifier 10;

The second part of the downlink switch Low Noise Amplifier (LNA) part 3 formed to prevent radiation of an RF signal from an unwanted place due to an incorrect switch connection of the high isolation RF (Radio Frequency) switch part 8. A downlink switch LNA (Low Noise Amplifier) switch 5 and a second uplink switch LNA (Low Noise Amplifier) switch 11 of the uplink switch LNA (Low Noise Amplifier) section 9;

The downlink and uplink signals of the downlink switch LNA (Low Noise Amplifier) unit 3 and the uplink switch LNA (9) are used as one Uplink Downlink Converter Unit (UDCU). A downlink and uplink up / down converter section 6;

The downlink And a high speed detector capable of accurately calculating the input levels of the downlink and uplink which are rapidly changed in order to sequentially input the downlink and uplink signals by using the uplink up / down converter unit 6 ( 6-1) parts;

A high power amplifier unit 7 capable of amplifying a signal of the downlink and uplink signals of the downlink and uplink up / down converter units 6 into a single high output amplifier;

A high isolation RF (Radio Frequency) switch unit for separating transmission and reception due to high isolation of downlink and uplink transmission and reception of the high power amplifier unit 7;

A main control unit (15) configured for a smooth procedure of downlink and uplink and other control and status monitoring functions of the portable internet repeater;

It is connected to the main control unit (Main Control Unit) unit 15 is composed of SDM (Sync Detector Module) 14 that can operate by applying the same to the repeater to catch the exact synchronization signal of the base station.

In addition, the input signal is primarily used in the downlink link switch LNA (Low Noise Amplifier) unit 3 to direct the input signal in a specific direction. Isolation is secured in the circulator and the switch, and the switch for transmitting and receiving separation for low signals is also applied to the uplink downlink converter unit (UDCU) and the high power amplifier (7). Is included, high RF (Radio Frequency) passed through the High Power Amplifier (7) The transmission and reception separation for the signal is formed by the separate high frequency RF (Radio Frequency) switch unit (8) is high between high transmission and reception Isolation can be applied and used on demand.

Each module in the path for transmission and reception puts a synchronization signal for transmission and a synchronization signal for reception in the High Power Amplifier section 7, respectively. When receiving, the transmission switch is turned off, the reception switch is turned on to operate, and the downlink switch LNA (Low Noise Amplifier) section 3 and the downlink and uplink up / down converter section 6 Includes a method that can be used as a system design by referring to the signal level of input / output range of downlink and uplink, noise figure (NF), system delay, etc.

In addition, the method for maintaining the synchronization signal is to install a separate synchronization module in the system when the downlink signal inputs the input signal in the downlink switch LNA (Low Noise Amplifier) unit (3) by coupling (synchronization module) The downlink switch LNA (3), the uplink switch LNA (9), downlink and uplink up / down Used by the down converter unit 6, the high power amplifier unit 7, the high isolation RF (Radio Frequency) switch unit 8, and the main control unit 15 To keep the synchronization signal.

The downlink and uplink up / down converter section 6 has a single converter using both paths of downlink and uplink, so that the downlink and uplink can cope with the input change of the downlink and uplink organically and actively. The downlink signal is checked in real time by changing the input signal level of the downlink signal and the input signal level of the uplink signal, and accurately calculating the level values of the downlink and uplink intervals that change at high speed to control the system. And the high speed detector 6-1 in the uplink up / down converter unit 6 to accurately calculate the downlink and uplink intervals that change at high speed to change RF (Radio Frequency) input in the field. Accurately detect level values to ensure stable operation of the system.

Hereinafter, with reference to the accompanying drawings to describe the present invention in detail.

3 is a diagram illustrating a repeater structure in which the downlink and uplink are configured as one path according to the present invention, and a signal transmission path in the repeater of the downlink;

As shown in FIG. 3, the present invention receives a signal from a base station from a donor antenna 1 and inputs the first surge coupler band pass filter (BPF) 2 of the first band pass filter (BPF) unit 16. Through the first band pass filter (BPF) unit 16 which suppresses the signals of other companies and passes the magnetic signals through a couple that can see the surge and the signal strength to prevent lightning. do. The passed signal is inputted to a downlink switch LNA (Low Noise Amplifier) unit 3 to couple a predetermined amount of the downlink signal from the base station to the SDM (Sync Detector Module) 14 for RF (Radio). Input a frequency signal, and the SDM (Sync Detector Module) 14 analyzes a radio frequency (RF) signal to find a time synchronization signal, and the downlink switch LNA (Low Noise Amplifier) unit 3 inside the repeater. Downlink and uplink up / down converter section 6, High Power Amplifier section 7, High Isolation Switch 8, Uplink Switch Low Noise Amplifier (LNA) It is configured to input to the unit 9, the main control unit 15, and the like.

When the signal is amplified to low noise by the low noise amplifier (LNA) of the downlink switch LNA (3), the first downlink switch (LNA) switch 4 is turned ON. The second downlink switch LNA 5 is turned off. The second downlink switch LNA 5 has a high isolation RF switch 8 malfunctioning at the downlink output, and thus the switch is not connected in the direction of the service antenna 13, and a donor antenna ( The downlink switch is a downlink switch inside the low noise amplifier (LNA) unit 3 which is connected in a 1) direction and operates to prevent high repeater output from radiating toward the base station of the uplink.

The signal passing through the downlink switch LNA (Low Noise Amplifier) section 3 passes through the downlink and uplink up / down converter section 6 which can use both transmission and reception of the downlink and uplink. In order to suppress a third-party signal that is in close proximity to the downlink and the uplink up / down converter section 6 in addition to the magnetic band, the signal passing through the downlink switch LNA (Low Noise Amplifier) section 3 is used. Use a filter.

In order to use the saw filter, a high frequency of RF (Radio Frequency) is converted into an intermediate frequency of IF band, the frequency is lowered by using a down converter, and after passing through the saw filter, the original RF (Radio) is used again by using an up converter. Frequency) characterized by converting to frequency.

Although the downlink and uplink up / down converters 6 are configured as a single module, the downlink and uplink up / down converters 6 operate separately for system gain control for each of the downlink and uplink, input signals for each transmission and reception, and temp adjustment. It is designed to. Therefore, to operate separately, the system accurately calculates the input level of the fast change of the downlink and uplink through the high speed detector 6-1 mounted in the downlink and uplink up / down converter unit 6, and operates the system. Ensure that the downlink and uplink work organically and accurately.

remind The signal passing through the downlink and uplink up / down converter section 6 passes through a high power amplifier section 7, and the high power amplifier section 7 provides high gain and linearity. Based on the signal amplifies.

In order to amplify both the downlink and the uplink to one high power amplifier unit 7, two RFs of the downlink and the uplink are operated so that the respective signals can be separately operated when the respective signals are introduced. The (Radio Frequency) switch signal operates by controlling the high power amplifier unit 7.

In addition, when a signal amplified by the high power amplifier unit 7 is generated, it enters the high isolation RF (Radio Frequency) switch unit 8 module, and the high isolation RF (Radio Frequency) switch unit 8 The switch is connected in the direction of the service antenna 13, the signal is input to the uplink switch unit Low Noise Amplifier (LNA) unit (9).

The input signal enters the second surge coupler BPF (Band Pass Filter) 12 when the second uplink switch LNA (Low Noise Amplifier) switch 11 is turned on, and the uplink switch LNA (Low Noise). The first uplink switch (LNA) of the amplifier (9) unit (LNA) switch unit 10 of the RF (Radio Frequency) switch should be off (OFF) state.

The signal inputted by the surge proteoter of the second surge coupler band pass filter (BPF) 12 passes through the second surge coupler band pass filter (BPF) 12 to provide a high output amplifier (High). Power Amplifier) removes a portion of the amplified section 7 amplifies other bands other than the magnetic band.

The signal passing through the surge projector radiates a downlink signal which is a transmission signal to the service antenna 13. Main control unit (15) that monitors the status of the repeater and other control while the repeater is in operation is configured to continuously operate to determine the status of the repeater.

4 is a diagram illustrating a repeater structure in which a downlink and an uplink are configured as one path and a signal transmission path in an uplink repeater according to the present invention.

As shown in FIG. 4, the uplink output receives a signal generated from the terminal from the service antenna 13, and a second surge coupler (BPF) 12 of the second band pass filter (BPF) unit 17. The second BPF (Band Pass Filter) part which suppresses other company's signals and passes the magnetic signal through a coupler which can see the surge of the signal and the strength of the signal. Pass 17.

The passed signal is input to the uplink switch LNA (Low Noise Amplifier) unit 9 to low noise amplification of the signal transmitted from the terminal in the LNA (Low Noise Amplifier), and the SDM ( Sync Detector Module) 14, characterized in that to use the extracted synchronization signal to put in the ceramic module.

In addition, the downlink signal is not input during the uplink input period, but the downlink signal is not input, so that the SDM (Sync Detector Module) 14 does not miss synchronization. It is possible to control and maintain the time synchronization of the system even when there is no synchronization signal at the link input.

When the signal is low noise amplified by the low noise amplifier (LNA) of the uplink switch low noise amplifier (LNA) unit 9, the first uplink switch low noise amplifier (LNA) switch 10 is turned on. The second uplink switch LNA (Low Noise Amplifier) switch 11 is turned OFF. In the radio frequency (RF) switch of the second uplink switch LNA (Low Noise Amplifier) switch 11, the high-frequency radio frequency (RF) switch unit 8 malfunctions when the uplink output is performed, and thus, toward the donor antenna 1. It refers to a radio frequency (RF) switch inside a low noise amplifier (LNA) which is not connected to the switch and is connected to the service antenna 13 to operate to prevent high repeater output from radiating toward the base station of the uplink.

The signal passing through the LNA (Low Noise Amplifier) part of the uplink switch LNA (Low Noise Amplifier) part 9 is transmitted to the downlink and uplink up / down converter part 6. Passes uplink downlink converter unit (UDCU).

A third-party signal that is closely adjacent to the downlink and uplink up / down converter section 6 in addition to the magnetic band by passing the signal passing through the low noise amplifier (LNA) section of the uplink switch LNA (Low Noise Amplifier) section 9 Use the saw filter to suppress the

In order to use the saw filter, a high frequency of RF (Radio Frequency) is converted into an intermediate frequency of IF band, the frequency is lowered by using a down converter, and after passing through the saw filter, the original RF (Radio) is used again by using an up converter. Frequency) characterized in that the conversion to frequency.

Although the uplink downlink converter unit (UDCU) of the downlink and uplink up / down converter 6 is configured in a single module form, system gain control for each of the downlink and the uplink, confirmation of input signals for each transmission and reception, and The temp adjustment is also configured to operate separately.

The signal passing through the downlink and uplink up / down converter section 6 passes through a high power amplifier section 7 and the high gain and linearity of the high power amplifier section 7. Based on this, the signal is amplified.

In addition, in order to amplify both the downlink and the uplink by a single high power amplifier unit 7, both the downlink and the uplink are operated so that they can be operated separately when a signal corresponding to each is introduced. doggy An RF (Radio Frequency) switch signal is characterized by operating by controlling the high power amplifier (7).

In addition, when a signal amplified by the high pass amplifier unit 7 is generated, a high isolation RF (Radio Frequency) unit 8 enters the module, and the RF (Radio Frequency) switch is a donor antenna (1). A switch is connected in the direction of, and a signal is input to the downlink switch LNA (Low Noise Amplifier) unit 3.

The input signal enters the first surge coupler BPF (Bnd Pass Filter) 2 when the second downlink switch LNA (Low Noise Amplifier) switch 5 is turned on, and the downlink switch LNA (Low Noise) The first downlink switch LNA (Low Noise Amplifier) switch 4 of the amplifier section 3 should be in an OFF state.

The signal input to the coupler (Coupler) of the first surge coupler BPF (BPF) 2 passes through the first band pass filter (BPF) 16 and is a high pass amplifier 7. Remove the amplified part from other bands other than the magnetic band.

The signal passing through the first surge coupler band pass filter (BPF) 2 radiates an uplink signal, which is a transmission signal, to the donor antenna 1. Main control unit (15) that monitors the status of the repeater and other control while the repeater is in operation is configured to continuously play a role in identifying the state of the repeater.

As described above, the preferred embodiment according to the present invention has been described, but the present invention is not limited to the above-described embodiment, and the present invention is not limited to the scope of the present invention as claimed in the following claims. Anyone with knowledge of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

As described above, the present invention can reduce the unit cost of the repeater and reduce the heat generation and use each module (LNA, high power amplifier, RFM) inside the repeater by using the high power amplifier as one without using both the downlink and uplink. It can be called a repeater that is different from the existing repeater because it can increase the space and reduce the repeater size by using it as a separate module.

In addition, the price increase, which is a disadvantage of the repeater, which consists of separate transmission and reception paths for the two contents of the frequency division duplex (FDD) method and the time division duplex (TDD) method as a separation method between the transmission and reception of the repeater. It is effective in solving problems such as overheating and increase in size.

Claims (5)

In the sharing method of a portable internet repeater, A surge coupler for lightning protection and a first surge coupler (BPF) for first band pass filter (BPF) 16 for band-passing; A second surge coupler 2BPF (Band Pass Filter) part 12; The first surge coupler (BPF) 2 and the second surge coupler (BPF) 12 transmit a signal to a circulator for guiding a signal input in a specific direction. A first downlink switch Low Noise Amplifier (LNA) 4, and a first uplink switch Low Noise Amplifier 10; The second part of the downlink switch Low Noise Amplifier (LNA) part 3 formed to prevent radiation of an RF signal from an unwanted place due to an incorrect switch connection of the high isolation RF (Radio Frequency) switch part 8. A downlink switch LNA (Low Noise Amplifier) switch 5 and a second uplink switch LNA (Low Noise Amplifier) switch 11 of the uplink switch LNA (Low Noise Amplifier) section 9; The downlink and uplink signals of the downlink switch LNA (Low Noise Amplifier) unit 3 and the uplink switch LNA (9) are used as one Uplink Downlink Converter Unit (UDCU). A downlink and uplink up / down converter section 6; The downlink And a high speed detector capable of accurately calculating the input levels of the downlink and uplink which are rapidly changed in order to sequentially input the downlink and uplink signals by using the uplink up / down converter unit 6 ( 6-1) parts; A high power amplifier unit 7 capable of amplifying a signal of the downlink and uplink signals of the downlink and uplink up / down converter units 6 into a single high output amplifier; A high isolation RF (Radio Frequency) switch unit for separating transmission and reception due to high isolation of downlink and uplink transmission and reception of the high power amplifier unit 7; A main control unit (15) configured for a smooth procedure of downlink and uplink and other control and status monitoring functions of the portable internet repeater; TD-type portable Internet consisting of SDM (Sync Detector Module) 14 connected to the main control unit (Main Control Unit) unit 15 can be operated by applying the same to the repeater to catch the exact synchronization signal of the base station Repeater uplink and downlink sharing method. The method of claim 1, The input signal is primarily used in the downlink switch LNA (Low Noise Amplifier) unit 3 to induce the input signal in a specific direction. Isolation is secured in the circulator and the switch, and transmission for low signals is also performed in the downlink and uplink up / down converter sections 6 and the high power amplifier section 7, and the like. And a switch for receiving separation, and a high radio frequency (RF) passing through the high power amplifier unit 7. The transmission and reception separation for the signal is formed by the separate high frequency RF (Radio Frequency) switch unit (8) is high between high transmission and reception An uplink and downlink sharing method of a TDID portable internet repeater, characterized in that it can be applied and used when required. The method of claim 1, Each module in the path for the transmission and reception puts a synchronization signal for transmission and a synchronization signal for reception in the high power amplifier section 7, respectively. When receiving, the transmission switch is turned off, the reception switch is turned on to operate, and the downlink switch LNA (Low Noise Amplifier) section 3 and the downlink and uplink up / down converter section 6 In the system design, the signal level for the input / output range of the downlink and uplink, the noise figure (NF), the system delay, etc. are referred to, and the method can be used as one by reflecting on the design. Uplink and downlink sharing method of the TDD portable Internet repeater. The method of claim 1, In the method of maintaining the synchronization signal, a separate synchronization module is installed in the system, and when the downlink signal is input, the input signal is coupled by the downlink switch LNA (Low Noise Amplifier) unit 3 and put into the synchronization module. The downlink switch LNA (Low Noise Amplifier) unit 3, the uplink switch LNA (9), downlink and uplink up / down converter The unit 6, the high power amplifier unit 7, the high isolation RF (Radio Frequency) switch unit 8, and the main control unit (15) are used to synchronize Uplink and downlink sharing method of the TDD portable Internet repeater, characterized by maintaining the signal. The method of claim 1, The downlink and uplink up / down converter section 6 has a single converter using both paths of downlink and uplink, so that the downlink and uplink can cope with the input change of the downlink and uplink organically and actively. In order to control the system by accurately checking the changed input signal level of the downlink signal and the changed input signal level of the uplink signal in real time, accurately calculating the level values of the downlink and uplink sections changing at high speed. The high speed detector 6-1 is provided inside the link and uplink up / down converter section 6 to accurately calculate the downlink and uplink sections that change at high speed, thereby changing the RF (Radio Frequency) input in the field. Up and down rings of the TD-based portable Internet repeater, which can detect the level value accurately and enable stable operation of the system. How to share.

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