KR20050041000A - Isolation improvement repeater system and thereof method - Google Patents

Abstract

The present invention relates to an IIR (Isolation Improvement Repeater) system that can be applied outdoors and a relay method thereof. Particularly, the algorithm that can be controlled in real time in the field by using the general cancellation method, the frequency change function from the terminal installed for NMS, the reception level (Rx level), the measured value (Ec / Io), and the like are applied. It relates to an RF repeater.

According to the invention, the first coupler is connected to the first antenna for detecting the input voltage; A second coupler connected to the second antenna for detecting an output voltage; A repeater inserted between the first combiner and the second combiner to secure an isolation for providing a relay service; An amplification / phase adjustment unit for fine-tuning the amplification and phase values in real time to prevent oscillation between the first and second couplers; A controller for determining whether the repeater is abnormal and controlling the amplification / phase adjustment unit to cancel the noise component applied through the closed loop; And an IIR system that can be applied outdoors, including a terminal for measuring a measured value and a reception level value by comparing the measured value and the reception level value with a reference value under the control of the controller.

Description

Outdoor child eye egg system and its relay method {Isolation improvement repeater system and approx method}

The present invention relates to an IIR (Isolation Improvement Repeater) system that can be applied outdoors and a relay method thereof. Particularly, the algorithm that can be controlled in real time in the field by using the general cancellation method, the frequency change function from the terminal installed for NMS, the reception level (Rx level), the measured value (Ec / Io), and the like are applied. It relates to an RF repeater.

In general, repeaters are used for expansion between mobile terminal users and base stations in various communication systems. In particular, it is difficult to apply the RF repeater to the outdoor even in the existing cellular system because it is difficult to secure the isolation (Isolation) between the transmitting and receiving antennas.

In order to solve this problem, many ideas have been derived, such as a no oscillation repeater. However, due to the required cancellation value and the limitation of the available bandwidth, there are few cases where an algorithm for securing reliability is lacked in the field.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a general cancellation method and a frequency change function, a reception level (Rx level), a measurement value (Ec / Io), etc. of a terminal installed for an NMS. It is possible to guarantee wideband characteristics by utilizing them, and to provide a real-time control algorithm and an RF relay system using the same in response to changes in input power and feedback noise signals in the field.

As the technical idea for achieving the above object of the present invention

A first step of setting up an initial value by a general cancellation method;

A second step of measuring measured value (Ec / Io) and received level (Rx level) value by utilizing a frequency changing function of a terminal installed for NMS;

Setting a reference value of the measured value and the reception level value to perform fine adjustment in real time below or above the reference value;

A fourth step of adjusting the amplification value and the phase value in real time based on the current measured value;

And a fifth step of measuring a change range of a reception level value and a measured value of a reception signal compared to the initial value.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

1 is a block diagram of an IIR system that can be applied outdoors according to the present invention.

Referring to FIG. 1, an isolation is secured to provide a relay service between a first coupler 20 connected to an input first antenna 10 and a second coupler 25 connected to an output second antenna 15. Repeater (30) for insertion is inserted.

The amplification / phase adjuster 40, the controller 50, and the terminal 60 are connected to the first and second combiners 20 and 25.

That is, the first coupler 20 is connected to the first antenna 10 to detect an input voltage; A second coupler 25 connected to the second antenna 150 to detect an output voltage; an inserted repeater 30 to secure an isolation between the first coupler 20 and the second coupler 25; Amplification / phase adjusting unit 40 for fine-tuning the amplification and phase values in real time between the first and second combiners 20 and 25; determining whether the repeater 30 is abnormal and amplifying / The control unit 50 for canceling the noise component applied through the closed loop by controlling the phase adjusting unit 40 and the measured value and the reception level value by using the frequency change function under the control of the control unit 50 and the reference value. It consists of a terminal 60 for comparison and measurement.

2 is a flowchart illustrating the oscillation principle of the IIR system according to the present invention.

First, the signal radiated from the base station is applied to the first antenna 10 of the input terminal of the repeater 30 (S110).

The input signal is amplified with a certain gain by the repeater 30 and output to the second antenna 15 (S120). At this time, the power radiated to the second antenna 25 is introduced into the first antenna 10 occurs.

The incoming noise forms a closed loop together with the gain of the repeater 30, thereby causing the IIR system to oscillate (S130).

3 is a flow chart showing the operating principle of the IIR system according to the present invention.

First, the gain of the initial repeater 30 is changed step by step from a low value to a high value (S210).

In this state, the output power of the repeater 30 is detected and stored using the second combiner 25 (S220), and then the input power of the repeater 30 is detected using the first combiner 20 (S230). ).

Thereafter, the terminal 60 checks the signal detected through the first combiner 20, and detects the measured value Ec / Io of the signal. Through this, the controller 50 determines whether the repeater 30 is abnormal (S240).

If the power radiated to the second antenna 15 through the closed loop is applied to the first antenna 10 again, the measured value Ec / Io is degraded.

At this time, the controller 50 amplifies or adjusts the phase of the signal stored and detected by the second combiner 25 and applies it to the first combiner 20 (S250).

In this state, since a noise component applied through the closed loop is formed in an inverse phase relationship with an arbitrary signal made with the first combiner 20 in phase and amplitude, only the noise component is canceled (S260). .

Therefore, since the measured value Ec / Io operates normally, the repeater 30 operates stably. After that, the process is repeated in real time including the frequency band (S270).

4 is a flowchart showing an actual operating state of the IIR system according to the present invention.

First, a preferred initial value is set up by a general cancellation method. For example, an amplification value and phase are included (S310).

Thereafter, by utilizing the frequency change function of the terminal 60 installed for the Network Management System (NMS), the measured value (Ec / Io) and the reception level (3) are changed while changing at least three frequency representative values in the bandwidth. Rx level) is measured (S320).

Next, by setting the reference value of the measured value (Ec / Io) and the reception level (Rx level), fine adjustment is performed in real time below or above the reference value (S330).

At this time, when the RF input signal is severely changed, the algorithm operation is operated based on the measured value Ec / Io.

Then, the amplification value and the phase value are adjusted in real time based on the current measured value (Ec / Io) (S340), and compared with the initial value, the change width of the received level (Rx Level) and the measured value (Ec) of the received signal. / Io) to operate the auto set-up mode (S350) if there is a severe variation compared to the reference value.

At this time, when an abnormality occurs in the terminal 60, it is possible to control in real time by applying the IRR system in the field by setting the initial value again.

As described above, according to the present invention, it is difficult to apply the conventional RF repeater to the outdoors even in the existing cellular system because it is difficult to secure the isolation (Isolation) between the transmission and reception antennas, the general cancellation (Cancellation) as in the present invention By using the frequency change function, reception level (Rx level), and measured value (Ec / Io) of the terminal installed for NMS and NMS, it is possible to change the input power and feedback signal while having broadband characteristics in the outdoor field. Active and real-time controllable algorithms can be provided, which can be applied to outdoor RF relay systems.

1 is a block diagram of an IIR system that can be applied outdoors according to the present invention.

2 is a flowchart illustrating the oscillation principle of the IIR system according to the present invention.

3 is a flow chart showing the operating principle of the IIR system according to the present invention.

4 is a flowchart showing an actual operating state of the IIR system according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: input side first antenna 15: output side second antenna

20: first coupler 25: second coupler

30: Repeater 40: Amplification / Phase Adjustment

50: control unit 60: terminal

Claims (5)

A first coupler connected to the first antenna for detecting an input voltage; A second coupler connected to the second antenna for detecting an output voltage; A repeater inserted between the first combiner and the second combiner to secure an isolation for providing a relay service; An amplification / phase adjustment unit for fine-tuning the amplification and phase values in real time to prevent oscillation between the first and second couplers; A controller for determining whether the repeater is abnormal and controlling the amplification / phase adjustment unit to cancel the noise component applied through the closed loop; And And a terminal for measuring the measured value and the reception level value by comparing the measured value and the reception level value with a reference value using a frequency change function under the control of the controller. A first step of setting up an initial value by a general cancellation method; A second step of measuring measured value (Ec / Io) and received level (Rx level) value by utilizing a frequency changing function of a terminal installed for NMS; Setting a reference value of the measured value and the reception level value to perform fine adjustment in real time below or above the reference value; A fourth step of adjusting the amplification value and the phase value in real time based on the current measured value; And a fifth step of measuring a change range of the reception level value and a measured value of the reception signal in comparison with the initial value. The method according to claim 2, wherein in the second step, the measurement value and the reception level value are measured while changing at least three frequency representative values in the bandwidth. The method according to claim 2, wherein in the third step, if the RF input signal is severely changed, an algorithm operation is performed based on the measured value (Ec / Io). The method of claim 2, wherein in the fifth step, when a change range of a reception level value is measured compared to an initial value, an automatic set-up mode is operated when there is a significant variation compared to a reference value. IIR relay method that can be applied outdoors.