CN103580736B - The method that LTE mimo system antenna opening power-balance controls - Google Patents
The method that LTE mimo system antenna opening power-balance controls Download PDFInfo
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- CN103580736B CN103580736B CN201310479375.6A CN201310479375A CN103580736B CN 103580736 B CN103580736 B CN 103580736B CN 201310479375 A CN201310479375 A CN 201310479375A CN 103580736 B CN103580736 B CN 103580736B
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Abstract
The method that disclosure a kind of LTE mimo system antenna opening power-balance controls, mainly increases path loss detection module in LTE MIMO repeater, and sticks passive electronic label ordinatedly inside dual polarized antenna.The radiofrequency signal that path loss detection module is launched, dual polarized antenna port is arrived via combiner etc., activate passive electronic label, passive electronic label launches radiofrequency signal by sky alignment path loss detection module after being activated, path loss detection module receives the radiofrequency signal that electronic tag sends over, MIMO trunking output port is calculated to the circuit loss value between dual polarized antenna port through data processing unit, data message is sent to monitoring unit, the circuit loss value information of the different feeder lines that monitoring unit sends according to data processing unit, automatically the power output valve of two downlinks of LTE MIMO repeater is adjusted.The present invention can find the unbalanced power of antenna opening in time, automatically adjusts antenna opening power.
Description
Technical field
The present invention relates to Information & Communication Technology field, be specifically related to the method that LTEMIMO system antenna mouth power-balance controls.
Background technology
Along with domestic mobile data services demand increases day by day, domestic each big operation commercial city has had begun to the examination commercialization net of LTE (LongTermEvolution) and has built, and in-door covering networking is the most important thing planned the 4G network second phase.MIMO (Multiple-InputMultiple-Out-put) technology is one of 4G core technology, and in improving network rate and quality, it plays key player.The newly-built indoor covering system of 4G is generally adopted double-fed line mimo system.A large amount of engineering tests show: the power of the end antenna port of double-fed line mimo system must be roughly equal, i.e. the performance number balance of two antenna ports, guarantee in-door covering region peak data rate, and now communication quality is optimum.
As it is shown in figure 1, be the LTE double-fed line MIMO indoor covering system figure at present with trunking.Wherein, repeater includes two-way up-downgoing and amplifies link, is connected to respectively between antenna for base station signal 1, antenna for base station signal 2 and two two power splitters.The downlink transfer link of Fig. 1 system: two-way antenna for base station signal enters LTE double-fed line MIMO repeater, amplified, filtering etc. process, output two-way radiofrequency signal goes out four tunnel radiofrequency signals respectively through two power splitter branches, and cross match is recombinated, and sends a signal to dual polarized antenna；Uplink link: with downlink transfer link contrast.
Current balancing antenna mouth power, can only lean on debugging and testing personnel to adjust antenna opening power when engineering opening commissioning or plant maintenance so as to output balances.But, the long-time operation of network, along with device aging, ambient temperature change etc. affect, certainly will have opposite impacts on one group of double-fed wire antenna mouth performance number, cause this group antenna opening unbalanced power, and then affect in-door covering region, traffic rate and communication quality.And when antenna opening unbalanced power, network monitoring center can't find this fault at once, only when the network rate of this section, of poor quality to customer complaint time, technical staff just can receive the notice of maintenance.
Summary of the invention
It is an object of the present invention to provide a kind of method that LTEMIMO system antenna mouth power-balance controls, it is possible to find the unbalanced power of antenna opening timely automated adjustment antenna opening power in time, to keep two antenna opening outputs equal.The object of the invention is realized by techniques below scheme:
A kind of method that LTEMIMO system antenna mouth power-balance controls, its based on system include base station, LTEMIMO repeater, two power splitters, dual polarized antenna and be attached at the passive electronic label inside dual polarized antenna, LTEMIMO repeater is arranged between base station and two two power splitters, and two two power splitter branch Chu tetra-tunnel radiofrequency signal cross matchs are delivered to dual polarized antenna through different feeder lines；LTEMIMO repeater includes: link, two combiners, two path loss detection modules, data processing unit and monitoring unit are amplified in two-way up-downgoing；Two combiners descending amplification link and a path loss detection module will connect two power splitters after closing road respectively on the way；Two two power splitter branch Chu tetra-tunnel radiofrequency signal cross matchs are delivered to dual polarized antenna through different feeder lines；It is characterized in that, described method includes:
(1) control said two path loss detection module and launch radiofrequency signal to described passive electronic label；
(2) described passive electronic label launches radiofrequency signal by described dual polarized antenna to path loss detection module after being activated；
(3) described path loss detection module receives the radiofrequency signal that passive electronic label is launched；
(4) radiofrequency signal of the data processing unit transmitting according to two path loss detection modules and reception, calculates LTEMIMO repeater output port to the circuit loss value P of difference feeder lines between dual polarized antenna portn, computing formula is as follows:
Pn=PTTX-PMRX-P△
Wherein, n is different feeder line names, n=1 or 2, PTTXLaunch the transmitting power of radiofrequency signal, P to path loss detection module for passive electronic labelMRXThe reception power of the radiofrequency signal that electronic tag sends over, P is received for path loss detection module△For passive electronic label to the incoming loss of the power within dual polarized antenna；
(5) monitoring unit circuit loss value P according to described different feeder linesn, adjust two-way up-downgoing and amplify the descending power output valve of link, so that the dual polarized antenna mouth transmission power level of same group of double-fed line keeps consistent.
As concrete technical scheme, it is identical that link construction is amplified in described two-way up-downgoing, is particularly configured to: include the first wave filter, first duplexer, power amplifier, LNA, the second duplexer and the second wave filter；First wave filter one terminates antenna for base station signal, and the other end is connected with first duplexer two-way communication；One outfan of first duplexer connects power amplifier, and the outfan of power amplifier connects an input of the second duplexer；One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA；One end two-way communication of the second duplexer and the second wave filter connects, and the other end of the second wave filter is for being connected with a described combiner two-way communication.
As concrete technical scheme, described monitoring unit adjusts the control signal of the descending power output valve that link is amplified in two-way up-downgoing and is respectively connected to the control end that the power amplifier of link is amplified in described two-way up-downgoing.
As concrete technical scheme, the frequency range of the radiofrequency signal that described path loss detection module is launched is: 920～925MHz；The frequency range of the radiofrequency signal that described passive electronic label is launched after being activated is: 920～925MHz.
The present invention increases path loss detection module in LTEMIMO repeater, and sticks passive electronic label ordinatedly inside dual polarized antenna.So, the radiofrequency signal that path loss detection module is launched, via combiner, feeder line, power splitter, arrive dual polarized antenna port, activate the passive electronic label being attached to inside antenna, passive electronic label launches radiofrequency signal by sky alignment path loss detection module after being activated, and path loss detection module receives the radiofrequency signal that electronic tag sends over, and calculates MIMO trunking output port to the circuit loss value between dual polarized antenna port through data processing unit；Data message is sent to monitoring unit, the circuit loss value information of the different feeder lines that monitoring unit sends according to data processing unit, it is possible to automatically adjust the power output valve of two downlinks of LTEMIMO repeater.
The beneficial effects of the present invention is:
A., the double-fed line transmission power back-off to signal attenuation is provided；
B. control antenna opening power be can balance, 4G internal home network speed and communication quality improved；
C. reduce terminal unit transmitting power, reduce terminal unit power consumption；
D. can find antenna opening power abnormal conditions in time, notify Surveillance center at once；
E. reduce attendant to turn out for work, lower maintenance cost；
F. according to business demand, can remote adjustment antenna opening power, control coverage, accomplish to save energy and reduce the cost.
Accompanying drawing explanation
Fig. 1 is the composition block diagram of the LTE double-fed line MIMO indoor covering system at present with trunking.
The composition block diagram of the LTEMIMO repeater that Fig. 2 provides for the embodiment of the present invention.
The antenna opening power-balance control principle block diagram that Fig. 3 provides for the embodiment of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Detailed description of the invention
As in figure 2 it is shown, the method that the LTEMIMO system antenna mouth power-balance that the present embodiment provides controls, mainly through a LTEMIMO repeater and coordinate a passive electronic label (not showing in Fig. 2) to realize.Wherein, LTEMIMO repeater is arranged between two two power splitters of base station and LTE double-fed line MIMO indoor covering system, and two two power splitter branch Chu tetra-tunnel radiofrequency signal cross matchs are delivered to dual polarized antenna through different feeder lines.LTEMIMO repeater includes: link is amplified in the first up-downgoing, link, the first combiner, the second combiner, the first path loss detection module, the second path loss detection module, data processing unit and monitoring unit are amplified in the second up-downgoing.
Wherein, the aerial signal 1 of the connection base station, one end of link is amplified in the first up-downgoing, and the other end connects the first combiner.The aerial signal 2 of the connection base station, one end of link is amplified in second up-downgoing, and the other end connects the second combiner.First combiner connects after the first up-downgoing is amplified the conjunction road, one end of link and the first path loss detection module.One two power splitter (in conjunction with Fig. 1).Second combiner connects another two power splitter (in conjunction with Fig. 1) after the second up-downgoing is amplified the conjunction road, one end of link and the second path loss detection module.Passive electronic label is attached at inside described dual polarized antenna, for launching radiofrequency signal by dual polarized antenna to path loss detection module after being activated.The other end of the first path loss detection module connects data processor, and it is for launching radiofrequency signal to passive electronic label, and receives the radiofrequency signal that passive electronic label is launched.The other end of the second path loss detection module connects data processor, and it is for launching radiofrequency signal to passive electronic label, and receives the radiofrequency signal that passive electronic label is launched.The radiofrequency signal of the data processing unit transmitting according to the first path loss detection module and the second path loss detection module and reception, calculates repeater output port to the circuit loss value of difference feeder lines between dual polarized antenna port.The circuit loss value information of the described different feeder lines that monitoring unit provides according to data processing unit, adjusts first, second up-downgoing and amplifies the descending power output valve of link.
Specifically, link is amplified in the first up-downgoing and the first up-downgoing amplification link construction is identical, is particularly configured to: include the first wave filter, first duplexer, power amplifier, LNA, the second duplexer and the second wave filter；First wave filter one terminates antenna for base station signal, and the other end is connected with first duplexer two-way communication；One outfan of first duplexer connects power amplifier, and the outfan of power amplifier connects an input of the second duplexer；One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA；One end two-way communication of the second duplexer and the second wave filter connects, and the other end of the second wave filter is for being connected with the described first or second combiner two-way communication.Above-mentioned monitoring unit adjusts the control signal of the descending power output valve that link is amplified in first, second up-downgoing and accesses the control end that the power amplifier of link is amplified in described first, second up-downgoing.
Above-mentioned LTEMIMO repeater, its double-channel downlink: antenna for base station signal 1, antenna for base station signal 2 close road respectively through respective wave filter, duplexer, power amplifier, duplexer, wave filter and path loss detection module, closes the signal behind road and is connected to antenna end at a distance by double-fed line；Double-channel uplink: the signal that distant antennas receives terminal unit transmission enters base station equipment after respective combiner, wave filter, duplexer, LNA, duplexer, wave filter.
As it is shown on figure 3, be the method that controls of LTEMIMO system antenna mouth power-balance provided by the invention, its principle is in that: increases path loss detection module in LTEMIMO repeater, and sticks passive electronic label ordinatedly inside dual polarized antenna.Wherein path loss detection module launches radiofrequency signal (920～925MHz), by through feeder line, combiner, power splitter, arrive dual polarized antenna port, activate the passive electronic label being attached to inside antenna, passive electronic label launches radiofrequency signal by sky alignment path loss detection module after being activated, and (920～925MHz, transmitting power is PTTX), path loss detection module receives the radiofrequency signal that electronic tag sends over, and (reception power is PMRX), then repeater output port can be calculated to the circuit loss value P between dual polarized antenna portn(n is different feeder line names, n=1 or 2)
Pn=PTTX-PMRX-P△
P△: passive electronic label is to the incoming loss of the power within dual polarized antenna, and after Antenna Design completes, this parameter is known determine value；
PTTX: passive electronic label dispatch from the factory after nominal value.
Pass through correlation data calculation, data message is sent to monitoring unit, the circuit loss value information of the different feeder lines that monitoring unit sends according to data processing unit, can automatically adjust two descending power output valves of repeater, it is ensured that the dual polarized antenna mouth transmission power level of same group of double-fed line keeps consistent.Citing: if the circuit loss value P of same group of double-fed line after testing, after computing1、P2It is respectively as follows: 18dB, 20dB, then two descending power output valve P can be adjusted in MIMO trunkingOUT1、POUT2So that POUT1-P1=POUT2–P2, that is: POUT118=POUT220, it may be assumed that POUT1+ 2=POUT2
The beneficial effects of the present invention is:
A., the double-fed line transmission power back-off to signal attenuation is provided；
B. control antenna opening power be can balance, 4G internal home network speed and communication quality improved；
C. reduce terminal unit transmitting power, reduce terminal unit power consumption；
D. can find antenna opening power abnormal conditions in time, notify Surveillance center at once；
E. reduce attendant to turn out for work, lower maintenance cost；
F. according to business demand, can remote adjustment antenna opening power, control coverage, accomplish to save energy and reduce the cost.
Above example is only and fully discloses the present invention, wherein physical circuit schematic diagram is not construed as realizing the unique instances of the present invention, the scope that should belong to the application exposure without creative work and other concrete examples attainable based on present subject matter, based on the present embodiment.
Claims (4)
1. the method that a LTEMIMO system antenna mouth power-balance controls, its based on system include base station, LTEMIMO repeater, two power splitters, dual polarized antenna and be attached at the passive electronic label inside dual polarized antenna, LTEMIMO repeater is arranged between base station and two two power splitters, and two two power splitter branch Chu tetra-tunnel radiofrequency signal cross matchs are delivered to dual polarized antenna through different feeder lines；LTEMIMO repeater includes: link, two combiners, two path loss detection modules, data processing unit and monitoring unit are amplified in two-way up-downgoing；Two combiners descending amplification link and a path loss detection module will connect two power splitters after closing road respectively on the way；It is characterized in that, described method includes:
(1) control said two path loss detection module and launch radiofrequency signal to described passive electronic label；
(2) described passive electronic label launches radiofrequency signal by described dual polarized antenna to path loss detection module after being activated；
(3) described path loss detection module receives the radiofrequency signal that passive electronic label is launched；
(4) radiofrequency signal of the data processing unit transmitting according to two path loss detection modules and reception, calculates LTEMIMO repeater output port to the circuit loss value P of difference feeder lines between dual polarized antenna portn, computing formula is as follows:
Pn=PTTX-PMRX-P△
Wherein, n is different feeder line names, n=1 or 2, PTTXLaunch the transmitting power of radiofrequency signal, P to path loss detection module for passive electronic labelMRXThe reception power of the radiofrequency signal that electronic tag sends over, P is received for path loss detection module△For passive electronic label to the incoming loss of the power within dual polarized antenna；
(5) monitoring unit circuit loss value P according to described different feeder linesn, adjust two-way up-downgoing and amplify the descending power output valve of link, so that the dual polarized antenna mouth transmission power level of same group of double-fed line keeps consistent.
2. the method that LTEMIMO system antenna mouth power-balance according to claim 1 controls, it is characterized in that, it is identical that link construction is amplified in described two-way up-downgoing, is particularly configured to: include the first wave filter, first duplexer, power amplifier, LNA, the second duplexer and the second wave filter；First wave filter one terminates antenna for base station signal, and the other end is connected with first duplexer two-way communication；One outfan of first duplexer connects power amplifier, and the outfan of power amplifier connects an input of the second duplexer；One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA；One end two-way communication of the second duplexer and the second wave filter connects, and the other end of the second wave filter is for being connected with a described combiner two-way communication.
3. the method that LTEMIMO system antenna mouth power-balance according to claim 2 controls, it is characterized in that, described monitoring unit adjusts the control signal of the descending power output valve that link is amplified in two-way up-downgoing and is respectively connected to the control end that the power amplifier of link is amplified in described two-way up-downgoing.
4. the method that LTEMIMO system antenna mouth power-balance according to claim 1 controls, it is characterised in that the frequency range of the radiofrequency signal that described path loss detection module is launched is: 920～925MHz；The frequency range of the radiofrequency signal that described passive electronic label is launched after being activated is: 920～925MHz.
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| CN104243060B (en) * | 2014-08-26 | 2016-11-23 | 国网山东省电力公司烟台供电公司 | A kind of retransmission unit based on LTE and radio frequency detection method |
| WO2016035828A1 (en) * | 2014-09-03 | 2016-03-10 | 株式会社Ｎｔｔドコモ | Wireless transmitting station |
| CN104159238A (en) * | 2014-09-09 | 2014-11-19 | 刘秀珠 | Method for indoor wireless communication system |
| CN110139309B (en) * | 2019-04-29 | 2022-07-19 | 武汉虹信科技发展有限责任公司 | Power detection and regulation system, power detection method and power regulation method |
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| US9031044B2 (en) * | 2008-08-20 | 2015-05-12 | Qualcomm Incorporated | Power control for wireless LAN stations |
| US8583160B2 (en) * | 2009-05-04 | 2013-11-12 | Qualcomm Incorporated | Uplink power control for wireless communication |
| CN102932897B (en) * | 2012-11-12 | 2015-12-16 | 中国联合网络通信集团有限公司 | Auxiliary pilot frequency transmission power adjustment method and base station |
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Inventor after: Hu Fengding Inventor before: Li Guang Inventor before: Wang Hongmei Inventor before: Lu Dunlu Inventor before: Fan Qiuyue |
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Effective date of registration: 20170504 Address after: 510631 Guangdong province Guangzhou Dashun Business Center No. 501 Tianhe District Zhongshan Road West, room B302 Patentee after: Guangzhou succession Communication Technology Co.,Ltd. Address before: On the south side of Zhuhai Avenue in Guangdong city of Zhuhai province Jinwan District 519090 Patentee before: GUODONG POLYTECHNIC OF SCIENCE AND TECHNOLOGY |
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