CN100359819C - Line loss automatic compensation system and method for active indoor distributed system - Google Patents
Line loss automatic compensation system and method for active indoor distributed system Download PDFInfo
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- CN100359819C CN100359819C CNB031319858A CN03131985A CN100359819C CN 100359819 C CN100359819 C CN 100359819C CN B031319858 A CNB031319858 A CN B031319858A CN 03131985 A CN03131985 A CN 03131985A CN 100359819 C CN100359819 C CN 100359819C
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- amplifier
- control module
- line loss
- main control
- distal stem
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Abstract
The present invention relates to a line loss automatic compensation system and a method for an active indoor distribution system, wherein the line loss automatic compensation system comprises a main trunk amplifier (101) and at least two far-end trunk amplifiers (103), and the main trunk amplifier (101) and the trunk amplifiers (103) are connected by a coupler (105) and cables (102). Particularly, a remotely controlled sensitivity signal detection module (1031) and a controlled gain adjustment module (1032) are set in each far-end trunk amplifiers (103). The method of the present invention comprises the following steps that feed source signal power received by respective trunk amplifier is detected by each remotely controlled module and the feed source signal power is reported to a main control module; line loss adjustment amounts needed by each far-end trunk amplifier are calculated by the main control module according to reported signal power, the needed line loss adjustment amounts are sent to respectively corresponding trunk amplifiers; emission gain and receiving gain are adjusted by the gain adjustment modules of remotely controlled modules in each far-end trunk amplifier according to the received line loss adjustment amounts.
Description
Technical field
The present invention relates to active indoor distributed system (In Building Coverage System), particularly adopt the active indoor distributed system of amplification module in the middle of many trunk amplifiers etc.
Background technology
Common active indoor distributed system, signal amplify the back through the backbone amplifier and are sent to each distal stem line amplifier by radio frequency cable, by antenna the zone that needs cover are covered again.Because the difference of radio frequency cable length, the line loss difference of signal from the backbone amplifier to each distal stem line amplifier, can cause the near-far interference of signal like this, that is to say that the distal stem line amplifier is far away more from the backbone amplifier, the received signal from the distal stem line amplifier to the backbone amplifier is just more little.Like this for the identical equal signal of trunk amplifier received power of gain, because the relation of feeder loss, putting near distal stem from trunk, to be put into the signal strength signal intensity that trunk puts just big than put signal strength signal intensity far away from trunk, feeder line length between two main lines amplify differs long more, difference between the signal is obvious more, the signal that the signal that can make the trunk amplifier of near-end receive like this disturbs the trunk amplifier of far-end to receive has slackened the effect of indoor distributed system.
In the prior art, the method that overcomes the above problems is, the gain of distal stem line amplifier is designed to adjustable, regulates the gain that each distal stem is put during installation as required, reduces near-far interference.Troublesome poeration like this, accuracy is not very high, and for trunk amplifier gain dynamically too big, be difficult for realizing, more be unfavorable for freely expanding of system.
Summary of the invention
The objective of the invention is to overcome the above-mentioned weak point of prior art and propose a kind of active indoor distributed system line loss bucking-out system and solution, realize the automatic compensation of line loss, can overcome the above problems neatly.
Described system and method for the present invention is realized by following scheme respectively:
Design, a kind of line loss self compensating system that is used for active indoor distributed system of structure comprise backbone amplifier and two-way distal stem line amplifier at least; Link to each other with cable with coupler therebetween; Especially be provided with control sensitivity signal detection module far away and controlled gain adjusting module in the described distal stem line amplifier.
Design, a kind of line loss automatic compensating method that is used for active indoor distributed system of employing, main control module and control module far away are set respectively in backbone amplifier and distal stem line amplifier, and in described control module far away, sensitivity signal detection module and controlled gain adjusting module are set; Especially described automatic compensating method may further comprise the steps:
Each control module far away detects separately, and trunk amplifier receives the feed signal power and is reported to main control module; Main control module calculates the required line loss adjustment amount of each distal stem line amplifier according to the described signal power that reports, and sends to corresponding trunk amplifier; The gain regulation module of the control module far away in described each distal stem line amplifier is adjusted transmitting gain and receiving gain by the line loss adjustment amount that receives.
Among the present invention, far control module and adjust the scope of dried separately gain of putting automatically, realized the automatic compensation of line loss, can solve near-far problem neatly, also the interference problem of effective resolution system to needs according to return results; And this method is easy to operate, is easy to freely expanding of the system that realizes.
Description of drawings
Fig. 1 is the schematic diagram of a kind of active indoor distributed system of adopting among the present invention;
Fig. 2 is the flow chart of the line loss automatic compensating method of the active indoor distributed system of the present invention.
Embodiment
Describe the present invention in detail with reference to one embodiment of the present of invention and accompanying drawing thereof below.
As shown in Figure 1, a kind of line loss self compensating system that is used for active indoor distributed system comprises backbone amplifier 101 and two-way distal stem line amplifier 103 at least; Link to each other with cable 102 with coupler 105 therebetween.Be provided with control module far away (not indicating) in the distal stem line amplifier 103, far control module and include control sensitivity signal detection module 1031 far away and controlled gain adjusting module 1032.Include main control module 1011 in the backbone amplifier 101.Main control module 1011 links to each other with control trunk amplifier 103 far away with wired mode or wireless mode.
The signal of GSM or CDMA and backbone amplifier 101 join, backbone amplifier 101 is given each distal stem line amplifier 103 by radio frequency cable 102 and coupler 105 with signal allocation, and distal stem line amplifier 103 sends GSM or CDMA signal by domestic aerial 104 again.Because devices such as radio frequency cable 102 and couplers 105, to each the feeder loss 103 and the size of the degree of coupling, all exist difference from backbone amplifier 101, this loss of link just occurred.The control sensitivity signal detection module 1031 far away of control module far away receives the line loss compensation order that main control module 1011 sends by wired or wireless method, and adjust the gain of trunk amplifier automatically according to line loss compensation order, thus link load automatic compensation.At main control module 1011 with within the spatial dimension that far the control module can be monitored, but increase the adjustment amount of whole system line loss, by adjusting 101 transmitting power, can increase, reduce suitable distal stem line amplifier 103 as required, line loss realizes adjusting automatically, convenient, flexible, need not manual intervention.
For realizing the automatic compensation of line loss, main control module 1011 is regulated backbone amplifier 101 makes its transmitting power constant, each distal stem line amplifier 103 of sending here according to each control module far away receives the size of transmit signal power, calculate the adjustment amount of the gain needs of each distal stem line amplifier 103, and this result sent to each control module far away, control module far away is adjusted the scope of dried separately gain of putting to needs automatically according to return results, thus the interference problem of resolution system easily and effectively.See also Fig. 2, the flow chart of line loss automatic compensating method of the present invention, flow process comprises following concrete steps:
Step 201: main control module 1011 is adjusted the transmitting power of backbone amplifier 101;
Step 202: main control module 1011 is initiated line loss compensation adjustment order;
Step 203: distal stem line amplifier 103 receives the detection of carrying out descending input power after the message;
Step 204: and report the result of power detection;
Step 205: main control module 1011 calculates the line loss adjustment amount that suitable line loss compensation result and each distal stem line amplifier 103 need according to the result that each control module far away reports;
Step 206: main control module 1011 sends to each distal stem line amplifier 103 with adjustment amount;
Step 207: distal stem line amplifier 103 is adjusted the gain of oneself, arrives set-point with the compensation feeder loss;
Step 208: each distal stem line amplifier 103 line loss adjustment finish, and report main control module adjustment result;
Step 209: the line loss compensation finishes automatically.
Claims (2)
1, a kind of line loss self compensating system that is used for active indoor distributed system comprises backbone amplifier (101) and two-way distal stem line amplifier (103) at least; Link to each other with cable (102) with coupler (105) therebetween; It is characterized in that:
Be provided with control sensitivity signal detection module far away (1031) and controlled gain adjusting module (1032) in the described distal stem line amplifier (103), comprise main control module (1011) in the described backbone amplifier (101) again, described main control module (1011) links to each other with described distal stem line amplifier (103) with wired mode or wireless mode, described main control module (1011) is used for calculating required line loss adjustment amount according to the signal power that described distal stem line amplifier (103) reports, described control sensitivity signal detection module far away (1031) is used to receive the line loss adjustment amount that described main control module (1011) sends, and described controlled gain adjusting module (1032) is used for adjusting transmitting gain and receiving gain according to the line loss adjustment amount.
2, a kind of line loss automatic compensating method that is used for active indoor distributed system branch, main control module and control module far away are set respectively in backbone amplifier and distal stem line amplifier, and in described control module far away, sensitivity signal detection module and controlled gain adjusting module are set, it is characterized in that: described automatic compensating method may further comprise the steps:
Described main control module is adjusted the transmitting power of backbone amplifier to set-point;
Each distal stem line amplifier is given in the sense command of described main control module transmitted power;
Each control module far away detects separately, and trunk amplifier receives the feed signal power and is reported to main control module;
Main control module calculates the required line loss adjustment amount of each distal stem line amplifier according to the described signal power that reports, and sends to corresponding trunk amplifier;
The gain regulation module of the control module far away in described each distal stem line amplifier is adjusted transmitting gain and receiving gain by the line loss adjustment amount that receives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031319858A CN100359819C (en) | 2003-06-21 | 2003-06-21 | Line loss automatic compensation system and method for active indoor distributed system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031319858A CN100359819C (en) | 2003-06-21 | 2003-06-21 | Line loss automatic compensation system and method for active indoor distributed system |
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| CN1567740A CN1567740A (en) | 2005-01-19 |
| CN100359819C true CN100359819C (en) | 2008-01-02 |
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| CNB031319858A Expired - Fee Related CN100359819C (en) | 2003-06-21 | 2003-06-21 | Line loss automatic compensation system and method for active indoor distributed system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100517995C (en) | 2006-03-08 | 2009-07-22 | 鸿富锦精密工业（深圳）有限公司 | Wireless receiving and transmission system |
| CN101127574B (en) * | 2007-09-18 | 2011-04-20 | 中兴通讯股份有限公司 | A line loss measurement method based on measurement value of mobile phone receiving signal intensity |
| CN104159285B (en) * | 2014-09-02 | 2018-03-27 | 辽宁邮电规划设计院有限公司 | A kind of LTE rooms subsystem autopower and adjusting method |
| CN110289919B (en) * | 2019-07-02 | 2022-03-08 | 西安易朴通讯技术有限公司 | Signal guarantee processing method, device, equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115526A (en) * | 1994-03-31 | 1996-01-24 | 美国电报电话公司 | Method and apparatus to compensate for differential attenuation in an optical time slot interchanger |
| CN1198276A (en) * | 1996-08-19 | 1998-11-04 | 阿尔卡塔尔-阿尔斯托姆通用电气公司 | Improvements in or relating to optical add/drop wavelength division multiplex systems |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115526A (en) * | 1994-03-31 | 1996-01-24 | 美国电报电话公司 | Method and apparatus to compensate for differential attenuation in an optical time slot interchanger |
| CN1198276A (en) * | 1996-08-19 | 1998-11-04 | 阿尔卡塔尔-阿尔斯托姆通用电气公司 | Improvements in or relating to optical add/drop wavelength division multiplex systems |
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| CN1567740A (en) | 2005-01-19 |
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Effective date of registration: 20180426 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: 518057 Department of law, Zhongxing building, South Science and technology road, Nanshan District hi tech Industrial Park, Shenzhen Patentee before: ZTE Corp. |
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Granted publication date: 20080102 |