CN103874111A

CN103874111A - Isolation-detection-based adaptive optimization method for repeater system

Info

Publication number: CN103874111A
Application number: CN201210553135.1A
Authority: CN
Inventors: 许汉铭
Original assignee: REMOTEK COMMUNICATION EQUIPMENT (SHANGHAI) CO Ltd
Current assignee: REMOTEK COMMUNICATION EQUIPMENT (SHANGHAI) CO Ltd
Priority date: 2012-12-18
Filing date: 2012-12-18
Publication date: 2014-06-18
Anticipated expiration: 2032-12-18
Also published as: CN103874111B

Abstract

The invention relates to an isolation-detection-based adaptive optimization method for a repeater system. The method comprises the following steps of detecting and acquiring an isolation value of a repeater by running an isolation detection mechanism; comparing the isolation value with a system gain to obtain different isolation states, and performing adaptive regulation to maximize the output power of the system within a set gain range to achieve an optimal running state in different ways according to different isolation states respectively. Compared with the prior art, the method has the advantages that uplinks and downlinks formed by each module in the repeater system can be automatically controlled through a preset flow to achieve an optimal output state, so that the workload and the labor intensity of staff can be greatly reduced, and the maintenance cost of the repeater can be lowered.

Description

The direct discharging station adaptive optimization method detecting based on isolation

Technical field

The present invention relates to wireless communication technology, especially relate to a kind of direct discharging station adaptive optimization method detecting based on isolation.

Background technology

Isolation be the input port signal of repeater to the degree of decay between delivery outlet, be the ratio of power, unit is: dB.It depends on the position of donor antenna and retransmitting antenna, also with the azimuth of antenna, and the relating to parameters such as front and back ratio.In real site is installed, donor antenna to BTS port and MS port to the isolation between retransmitting antenna as shown in Figure 1, measure by employing signal source, spectrum analyzer, power amplifier by the mensuration of its isolation.In the time testing in this way, because signal source and spectrum analyzer belong to high-precision instrument, be not easy to use in the wild, another kind method is to be based upon theoretical calculating aspect, but actual environment can be because of the variation of weather, the reflection of Adjacent Buildings and absorption, affect the isolation of dual-mode antenna, thus can and actual Zhi Xiang missionary society larger.

There is self-excitation in the bad problem of bringing of isolation, donor antenna, from donor base station signal, after amplify repeater, is launched by retransmitting antenna exactly.Part signal is coupled to the back lobe of donor antenna by the back lobe of retransmitting antenna, then is amplified by repeater, and repeater just forms a potential positive and negative feedback loop like this.Thereby it is sharp that isolation originates from not, repeater can be burnt out like this, the while is also caused the interference to base station, causes the large area user can not proper communication.

Summary of the invention

Object of the present invention is exactly to provide a kind of direct discharging station adaptive optimization method detecting based on isolation in order to overcome the defect that above-mentioned prior art exists, the method can be according to the isolation value that detects system, carry out self-adapted adjustment system parameter according to the situation of self and residing network environment simultaneously, the power output maximum that makes system, reaches optimized operation state.

Object of the present invention can be achieved through the following technical solutions:

The direct discharging station adaptive optimization method detecting based on isolation, the method comprises the following steps:

1) system operation isolation testing mechanism, detects the isolation value of obtaining repeater;

2) this isolation value and system gain are compared, if isolation value > first threshold judges that isolation is good, execution step 3); If Second Threshold≤isolation value≤first threshold, judges that isolation is general, execution step 6); If isolation value < Second Threshold, judges that isolation is poor, cannot converse;

3) making the actual gain of uplink downlink is theoretical gain, execution step 4);

4) judge starting to control the degree of depth and whether being greater than 0dB of automatic gain control, if be greater than 0dB, the degree of depth of starting to control that decays to automatic gain control is 0dB;

5) whether the power output of detection system is full power output, if NO, reduces link gain value and makes system reach full power output, if cannot reach full power output, reduces the yield value of link to 0dB;

6) make actual gain=isolation value-gain adjustment value of uplink downlink, execution step 7);

7) take the actual gain of this uplink downlink as benchmark, judge starting to control the degree of depth and whether being greater than 0dB of automatic gain control, if be greater than 0dB, the degree of depth of starting to control that decays to automatic gain control is 0dB, execution step 8);

8) whether the power output of detection system is full power output, if NO, reduce link gain value and make system reach full power output, if cannot reach full power output, reduce the yield value of link to step 6) in the actual gain of the uplink downlink that obtains;

Described first threshold is system gain+5dB, and Second Threshold is system gain-20dB;

Step 6) if in the network at direct discharging station place be GSM or DCS network, gain adjustment value is 7dB, if WCDMA network, gain adjustment value is 10dB.

Step 1) in the concrete steps that detect of isolation value be: send isolation and detect request to intrasystem each module, in the time that its isolation sense switch state is pass, recover original each on off state of preserving, read isolation value simultaneously, then whether detect isolation enabled state for opening, if open, perform step 2.

Compared with prior art, the present invention can, according to the isolation value that detects system, carry out self-adapted adjustment system parameter according to the situation of self and residing network environment simultaneously, makes the power output maximum of system, reaches optimized operation state.Detect after isolation value in system, can automatically control the uplink downlink that in direct discharging station, each module forms by default flow process and realize optimum output state, the workload that can greatly reduce a staff and working strength, reduce the maintenance cost of repeater.

Accompanying drawing explanation

Fig. 1 is the connection diagram of repeater and donor antenna, retransmitting antenna;

Fig. 2 is flow chart of the present invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

Embodiment

As shown in Figure 2, a kind of direct discharging station adaptive optimization method detecting based on isolation, the method comprises the following steps:

Step 1, system operation isolation testing mechanism, the isolation value of repeater is obtained in detection, concrete process detects request to intrasystem each module for first sending isolation, in the time that its isolation sense switch state is pass, recovers original each on off state of preserving, read isolation value simultaneously, then whether detect isolation enabled state for opening, if open, perform step 2.

Step 2, compares this isolation value and system gain, if isolation value > first threshold judges that isolation is good, and execution step 3; If Second Threshold≤isolation value≤first threshold, judges that isolation is general, execution step 6; If isolation value < Second Threshold, judges that isolation is poor, cannot converse.In the present embodiment, first threshold is made as system gain+5dB, and Second Threshold is made as system gain-20dB.

Step 3, the actual gain that makes uplink downlink is theoretical gain, execution step 4;

Step 4, judges starting to control the degree of depth and whether being greater than 0dB of automatic gain control, if be greater than 0dB, the degree of depth of starting to control that decays to automatic gain control is 0dB;

Step 5, whether the power output of detection system is full power output, if NO, reduces link gain value and makes system reach full power output, if cannot reach full power output, reduces the yield value of link to 0dB;

Step 6, makes actual gain=isolation value-gain adjustment value of uplink downlink, execution step 7).If now the network at direct discharging station place is GSM or DCS network, gain adjustment value is 7dB, if WCDMA network, gain adjustment value is 10dB.

Step 7, take the actual gain of this uplink downlink as benchmark, judges starting to control the degree of depth and whether being greater than 0dB of automatic gain control, if be greater than 0dB, the degree of depth of starting to control that decays to automatic gain control is 0dB, execution step 8;

Step 8, whether the power output of detection system is full power output, if NO, reduces link gain value and makes system reach full power output, if cannot reach full power output, the yield value that reduces link is to the actual gain of the uplink downlink obtaining in step 6;

The present invention is by detecting the isolation value of system, carry out self-adapted adjustment system parameter according to the situation of self and residing network environment simultaneously, automatically control the uplink downlink that in direct discharging station, each module forms and realize optimum output state, the working strength that can greatly reduce a staff, reduces the maintenance cost of repeater.

Claims

1. the direct discharging station adaptive optimization method detecting based on isolation, is characterized in that, the method comprises the following steps:

8) whether the power output of detection system is full power output, if NO, reduce link gain value and make system reach full power output, if cannot reach full power output, reduce the yield value of link to step 6) in the actual gain of the uplink downlink that obtains.

2. a kind of direct discharging station adaptive optimization method detecting based on isolation according to claim 1, is characterized in that, described first threshold is system gain+5dB, and Second Threshold is system gain-20dB.

3. a kind of direct discharging station adaptive optimization method detecting based on isolation according to claim 1, it is characterized in that step 6) if in the network at direct discharging station place be GSM or DCS network, gain adjustment value is 7dB, if WCDMA network, gain adjustment value is 10dB.

4. a kind of direct discharging station adaptive optimization method detecting based on isolation according to claim 1, it is characterized in that, step 1) in the concrete steps that detect of isolation value be: send isolation and detect request to intrasystem each module, in the time that its isolation sense switch state is pass, recover original each on off state of preserving, read isolation value simultaneously, whether then detect isolation enabled state for opening, if open, perform step 2.