CN101594710B - Automatic shut-off method for uplink of TD repeater - Google Patents
Automatic shut-off method for uplink of TD repeater Download PDFInfo
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- CN101594710B CN101594710B CN2009103041924A CN200910304192A CN101594710B CN 101594710 B CN101594710 B CN 101594710B CN 2009103041924 A CN2009103041924 A CN 2009103041924A CN 200910304192 A CN200910304192 A CN 200910304192A CN 101594710 B CN101594710 B CN 101594710B
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Abstract
The invention relates to the communication field, in particular to an automatic shut-off method for a uplink of a TD repeater, which comprises that: a switch is arranged between a low-noise amplifier of the uplink and a medium-frequency module; the output end of the low-noise amplifier is connected with a control circuit; the control circuit is used for controlling the on-off of a connecting switch so as to control the running of the uplink; after the repeater runs, the control circuit detects an output radio frequency signal of the low-noise amplifier, and then the control circuit transmits a control signal to the switch according to the intensity of the radio frequency signal; if the radio frequency signal is greater than the set value, a starting signal is given to make the switch to be in a conductive state; and if the radio frequency signal is lower than the set value, a closing signal is given to make the switch to be in a shut-off state. The automatic shut-off method has the advantages of reducing the noise influence of the repeater on a base station, improving the communication quality of network, contributing to driving a plurality of repeaters by one base station, enlarging the covering range of the base station, and expanding the application respect of a micropower repeater.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of TD direct end uplink link automatic shut-off method.
Background technology
As shown in Figure 1, comprise up link and down link in the existing TD wireless discharging-directly station device structure, its operation principle is as follows respectively:
Down link: the downstream signal that is sent by the base station receives through donor antenna, enter the logical fluid strainer of radio frequency band of frequency band, arrive synchro switch, tell uplink and downlink signals, downstream signal has entered low noise amplifier, signal after the amplification enters ifd module, in ifd module, carry out down-conversion, intermediate frequency filter glass, upconversion process, send into power amplifier again, make signal power reach the transmitting power requirement, behind synchro switch, the logical fluid strainer of radio frequency band, signal is transmitted into the overlay area by forwarding antenna.
Up link: the upward signal that user mobile phone sent, receive by forwarding antenna, through rf filtering, synchro switch, LNA, ifd module, power amplification, synchro switch, rf filtering, issue the base station again, make user mobile phone and base station constitute two-way communication from donor antenna.
Existing repeater unavoidably has noise level output when operate as normal, deliver to the base station after the noise level process up path loss of direct end uplink output, the noise level of base station receiver input is increased, the receiving sensitivity of base station receiver descends, thereby the up coverage in base station is diminished, and number of users reduces.So the introducing of repeater can enlarge the coverage of base station on the one hand, again the covering and the capacity of former donor base station produced certain influence on the other hand.When a plurality of repeater of band, a base station, this to influence meeting bigger.For the coverage that reduces the adverse effect of direct end uplink noise, can adopt usually suitably to dwindle the repeater to the base station reducing the up gain of repeater, thereby the upstream noise of repeater is controlled within the tolerable scope.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of TD direct end uplink link automatic shut-off method is provided, this method is used for micro-power repeater equipment, by in TD direct end uplink link, setting up control circuit and switch, and set operational mode, when no user in the wireless discharging-directly station overlay area is used, the repeater can automatically shut down up amplification link, at this moment, the repeater does not just have upstream noise output to the base station, just can not exert an influence to base station noise yet.
The object of the invention realizes being finished by following technical scheme:
A kind of micropower TD direct end uplink link automatic shut-off method, it is characterized in that this method is by being provided with switch between the low noise amplifier of described up link and ifd module, and at described low noise amplifier output connection control circuit, described control circuit is used for the switching of control connection switch and controls described up link operation; After the operation of repeater, described control circuit detects the output radiofrequency signal of described low noise amplifier, control circuit is strong and weak to described switch controlling signal according to radiofrequency signal afterwards: when being higher than set point as if radiofrequency signal, providing start signal and make switch be in conducting state; If when radiofrequency signal is lower than set point, provides shutdown signal and make switch be in off state.
The transmitting power of described up link is not less than 10mw.
Described set point is the level value of described low noise amplifier output radiofrequency signal.
Advantage of the present invention is: reduce the noise effect of repeater to the base station, improve network communication quality; Help a plurality of repeaters of base station band, enlarge base station range; Enlarged the application prospect of micro-power repeater.
Description of drawings
Fig. 1 is existing TD repeater principle schematic
Fig. 2 is a principle of the invention schematic diagram.
Embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
Shown in Fig. 1-2, label 1-9 represents respectively: donor antenna 1, the logical fluid strainer 2 of radio frequency band, synchro switch 3, power amplifier 4, ifd module 5, low noise amplifier 6, switch 7, control circuit 8, forwarding antenna 9.
As shown in Figure 2, direct amplifying station device in the embodiment of the invention comprises donor antenna 1, up link, down link and forwarding antenna 9, the uplink and downlink link is a parallel-connection structure, and the node at its two ends is connected with donor antenna 1, forwarding antenna 9 with synchro switch 3 by radio frequency normal open fluid strainer 2 respectively.Wherein the uplink and downlink link includes low noise amplifier 6, ifd module 5 and the power amplifier 4 that connects successively, the difference of up link and down link is to be provided with switch 7 between the low noise amplifier 6 of up link and the ifd module 5, described switch 7 is connected with the output of control circuit 8, and described control circuit 8 inputs are connected with the output of described low noise amplifier 6.Control circuit 8 can be placed in the monitoring unit of prior art when circuit design.
The transmitting power of above-mentioned direct amplifying station device has following requirement: the transmitting power of down link is not less than 20mw; The transmitting power of up link is not less than 10mw.
In conjunction with the said apparatus structure, below be elaborated for automatic shut-off method for uplink:
When having user terminal to use in the area of coverage of repeater, forwarding antenna 9 is accepted the up radiofrequency signal that the user terminal mobile phone sends, through the logical fluid strainer 2 of radio frequency band, synchro switch 3 arrives low noise amplifier 6, the radiofrequency signal of low noise amplifier 6 outputs is divided into two-way, one the tunnel through switch 7, ifd module 5 and power amplifier 4 are delivered to donor antenna 1 and are issued the base station, another road radiofrequency signal is delivered to control circuit 8, the control circuit 8 of this moment produces a control signal (being made as high level in the present embodiment) and delivers to switch 7, make switch 7 be in conducting state, then up link is in normal operating conditions.
When not having user terminal or terminal phone to be in holding state in the area of coverage of repeater, forwarding antenna 9 can't accept the up radiofrequency signal that user mobile phone sends, maybe can only receive very faint up radiofrequency signal, then LNA output 6 does not have yet or has only radiofrequency signal seldom to deliver to control circuit 8, this moment, control circuit 8 was after the detection radiofrequency signal is lower than set point, it can produce another control level signal (being made as low level in the present embodiment) and deliver to K switch, make switch 7 be in off state, then up link is in off state.
Above-mentionedly judge that whether the area of coverage exists the foundation of user terminal or terminal phone is to detect the power of up radiofrequency signal, promptly compares a up radiofrequency signal and a set point in control circuit 8.This set point be low noise amplifier output radiofrequency signal level value (approximately-54dbm).It is according to being: when the minimum distance of mobile phone and domestic aerial is 1.5 meters, mobile phone output minimum power is-50m, 1.5 the space path loss of rice is 43db, consider antenna for mobile phone gain (0db), domestic aerial gain (3db), human body loss (3db), indoor feeder loss (1db) again, and establish LNA gain and be 40db, then can calculate this moment LNA output level and be about-54dbm.
In sum, when the present invention can accomplish that no user is used in the area of coverage of repeater, the repeater can automatically shut down up link, base station noise is not had a negative impact.This has just overcome existing repeater can influence base station noise all the time after opening shortcoming.
Traditional indoor distributed system all is with solving than large tracts of land indoor signal blind area and weak signal zone covering problem, to less than 100m
2-300m
2Following indoor signal blind area, because the Financial cost factor, traditional indoor distributed system can't well solve.So the signal blind zone of these fritters has become the last blind spot of mobile communications network.Along with the 3G epoch arrive, since the 3G business particularly high-end business 70% ~ 80% all occur in indoor, the covering problem that solves these numerous fritter indoor signals blind areas will become many people's demand, and get a little flexibly, be convenient to install with cheap micro-power repeater and will obtain more application.And the technology of the present invention is applied in and can reduces the noise effect of repeater to the base station in the micro-power repeater equipment, improve network communication quality, also help a base station and can be with a plurality of repeaters, enlarge base station range, also enlarged the application prospect of micro-power repeater simultaneously.
Claims (3)
1. micropower TD direct end uplink link automatic shut-off method, it is characterized in that this method is by being provided with switch between the low noise amplifier of described up link and ifd module, and at described low noise amplifier output connection monitoring unit, described monitoring unit is used for the switching of control connection switch and controls described up link operation; When the repeater is moved, described monitoring unit detects the output radiofrequency signal of described low noise amplifier, monitoring unit is strong and weak to described switch controlling signal according to radiofrequency signal afterwards: when being higher than the set point of monitoring unit as if radiofrequency signal, providing start signal and make switch be in conducting state; If when radiofrequency signal is lower than the set point of monitoring unit, provides shutdown signal and make switch be in off state.
2. a kind of micropower TD direct end uplink link automatic shut-off method according to claim 1 is characterized in that the transmitting power of described up link is not less than 10mw.
3. a kind of micropower TD direct end uplink link automatic shut-off method according to claim 1 is characterized in that described set point is the level value of described low noise amplifier output radiofrequency signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103041924A CN101594710B (en) | 2009-07-09 | 2009-07-09 | Automatic shut-off method for uplink of TD repeater |
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| CN2009103041924A CN101594710B (en) | 2009-07-09 | 2009-07-09 | Automatic shut-off method for uplink of TD repeater |
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| CN101594710A CN101594710A (en) | 2009-12-02 |
| CN101594710B true CN101594710B (en) | 2011-09-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105871445B (en) * | 2015-01-23 | 2019-09-13 | 中国移动通信集团公司 | A kind of repeater control method and device |
| CN105992329B (en) * | 2015-02-27 | 2019-09-06 | 展讯通信（上海）有限公司 | The method of signal amplifying apparatus and its control method, identification signal amplifying device |
| CN105376763A (en) * | 2015-11-23 | 2016-03-02 | 中国联合网络通信有限公司西安市分公司 | A micro-area communication system, and an uplink noise interference suppression and energy-saving method thereof |
| CN110784916A (en) * | 2019-10-30 | 2020-02-11 | 陕西天基通信科技有限责任公司 | Self-adaptive control method and system according to terminal user traffic |
| CN116669076B (en) * | 2023-07-28 | 2023-10-20 | 深圳国人无线通信有限公司 | Method and system for improving uplink service perception of radio frequency signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6748194B2 (en) * | 2001-02-28 | 2004-06-08 | Korea Telecom M.Com Co., Ltd. | Repeater system having oscillation preventing function and automatic reverse output disabling function for non-subscriber and control method thereof |
| CN101102556A (en) * | 2007-06-19 | 2008-01-09 | 武汉虹信通信技术有限责任公司 | A method for reducing interference of GSM direct end uplink noise on base station |
| CN101399595A (en) * | 2008-11-07 | 2009-04-01 | 武汉虹信通信技术有限责任公司 | GSM repeater uplink noise suppressing method based on baseband signal processing |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6748194B2 (en) * | 2001-02-28 | 2004-06-08 | Korea Telecom M.Com Co., Ltd. | Repeater system having oscillation preventing function and automatic reverse output disabling function for non-subscriber and control method thereof |
| CN101102556A (en) * | 2007-06-19 | 2008-01-09 | 武汉虹信通信技术有限责任公司 | A method for reducing interference of GSM direct end uplink noise on base station |
| CN101399595A (en) * | 2008-11-07 | 2009-04-01 | 武汉虹信通信技术有限责任公司 | GSM repeater uplink noise suppressing method based on baseband signal processing |
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Owner name: SHANGHAI BEIDIAN INDUSTRY (GROUP) CO., LTD. Free format text: FORMER NAME: SHANGHAI BEIDIAN INDUSTRY CO., LTD. |
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Address after: 201206 floor, building D, No. 501 Jinqiao Jin Road, Shanghai, Pudong New Area, China Patentee after: Shanghai electric power industry (Group) Limited by Share Ltd Address before: 201206 floor, building D, No. 501 Jinqiao Jin Road, Shanghai, Pudong New Area, China Patentee before: Shanghai Beidian Industry Co., Ltd. |