CN102300219A - Far-end micropower access system used for mobile communication signal elevator coverage and method thereof - Google Patents
Far-end micropower access system used for mobile communication signal elevator coverage and method thereof Download PDFInfo
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- CN102300219A CN102300219A CN2011102342527A CN201110234252A CN102300219A CN 102300219 A CN102300219 A CN 102300219A CN 2011102342527 A CN2011102342527 A CN 2011102342527A CN 201110234252 A CN201110234252 A CN 201110234252A CN 102300219 A CN102300219 A CN 102300219A
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Abstract
The invention relates to a far-end micropower access system used for mobile communication signal elevator coverage and a method thereof. The system comprises at least one near-end unit, N coaxial cables and N far-end units. A base station connects with the near-end units through feeder cables. The near-end units connect with the N far-end units through the N coaxial cables, the far-end units are installed at top of an elevator, the near-end units are installed at a place having a base station information source and are close to an elevator shaft. The far-end units have a built-in emission antenna and a built-in reception antenna. The far-end units can complete direct current source extraction and DC/DC conversion to supply power for each active device of the far-end units, and complete mobile communication signal uplink and downlink signals amplification and elevator signal coverage functions. The near-end units complete a power equal dividing function of one path to multipath, and complete a function of direct current source feeding in each branch. According to the invention, an elevator coverage problem can be effectively solved, engineering construction is simple, cost is low, and the system and the method are suitable for large area popularization.
Description
Technical field
The present invention relates to a kind of mobile communication signal covering system, be meant a kind of far-end micropower connecting system and method that the mobile communication signal elevator covers that be used for especially.
Background technology
In short supply along with the fast development of urban construction and urban land, work in high level building and rise residential are more and more, important zones such as the basement in building, elevator, room, mobile phone uses frequent day by day.But in basement, elevator etc. the place mobile phone signal quite weak, in most cases be signal blind zone, can't satisfy normal communication.And these places also are that higher telephone traffic demand is arranged, and cover requirement so the wireless signal in these places must satisfy the degree of depth.
Degree of depth covering to above-mentioned place has certain importance, except solving the problem a little less than the wider mobile phone signal in the building, also solved simultaneously the problem of telephone call difficulty when in these special places, running into urgent thing, become a safeguard, therefore the degree of depth that covers at the lift car cell phone network covers engineering becomes a convenience-for-people engineering.
Add up according to relevant data, complaint about the poor signal in places such as elevator, basement is high in recent years, and particularly rise residential is very big to the complaint amount in these places, because the unique texture in these places, the difficulty that makes wireless signal cover strengthens.It is a kind of during the degree of depth covers that elevator signal covers, and also is the relatively problem of headache of various places mobile operator and administration departments, has also influenced the brand image of operator to a certain extent.
The architectural feature of elevator makes it become the blind area that signal covers:
(1) elevator generally is positioned at the center of building, the signal serious shielding;
(2) elevator hoistways is long and narrow, has tunnel effect, causes wireless signal loss to be accelerated;
(3) elevator is across firm armored concrete, and outdoor signal is difficult to cover whole hoistway;
(4) lift car is a metal structure, and signal is had very strong screen effect.
Traditional elevator covers the problem of scheme and existence:
(1) adopt Yagi antenna to cover: can't insert 2G and 3G signal simultaneously; Change in signal strength is bigger during the elevator cage height change, jitter.
(2) adopt leaky cable to cover: the elevator hoistways difficulty of construction is bigger.In addition, because linear impairments is very big to the signal strength signal intensity influence of feeder line first and last section, coupling loss causes signal distributions inhomogeneous.
(3) adopt plate aerial to cover: to exist hoistway to switch; Usually the plate aerial usage quantity is more, the signal quality instability; Also there is certain degree of difficulty in construction.
(4) safe class of elevator is higher, and is bigger to the difficulty of construction of elevator, such as engineering construction, fix up an aerial wire, power taking etc.Wireless coverages such as the limited wiring of installation space, the problem that difficult coordination, Power Selection are installed and conveyance system trouble exist bigger difficulty.
Therefore need a kind of product that elevator covers that is specifically applied to, guarantee the effect that elevator covers, can accomplish that again the engineering construction amount is few simultaneously, easy for installation, power taking is convenient, and cost is lower.
Summary of the invention
The present invention provides a kind of far-end micropower connecting system and method that the mobile communication signal elevator covers that be used in view of present elevator covers existing problem.The present invention can effectively solve the elevator covering problem, and engineering construction is simple, and cost is low, and very suitable large tracts of land is promoted.
A kind of far-end micropower connecting system that is used for the covering of mobile communication signal elevator, this system comprises a near-end unit, N root coaxial cable and N far-end unit at least, the base station links to each other with the near-end unit by feeder, it is characterized in that: the near-end unit links to each other with N far-end unit respectively by N root coaxial cable, and far-end unit is installed in the top of elevator, and the near-end unit is installed in the place of base station information source, and near near the elevator, N is 2,4,8,16,32,
Described coaxial cable has super flexibility and anti-alternating bending, and can finish the propagation function of mobile communication signal and DC power supply;
Built-in transmitting antenna of described far-end unit and reception antenna, far-end unit can be finished DC power supply extraction and DC/DC conversion and be each active device power supply of far-end unit, finishes amplification and elevator signal covering function that link is amplified in the mobile communication signal up-downgoing;
The branch functions such as power that mobile communication signal one tunnel becomes multichannel are finished in described near-end unit, finish the function that DC power supply is fed into each branch road.
Described near-end unit comprises at least: power distributing unit, power supply unit, a N low pass filter, a N high pass filter; Signal from the mobile base station links to each other with the power distributing unit of near-end unit by the feeder line, after linking to each other with N high pass filter respectively, power distributing unit forms N output port, electric main links to each other with the power supply unit of near-end unit, form N output port after power supply unit links to each other with N low pass filter respectively, N is 2,4,8,16,32 ...In the near-end unit, the power of finishing mobile communication signal is waited branch N road, finishes DC power supply and is fed into each branch road.
Described far-end unit comprises at least: the signal high pass filter, the DC power supply low pass filter, the DC/DC unit, link is amplified in up-downgoing, input power detection unit and power output detection unit, control unit, two duplexers, by first amplifier, first filter, first attenuator, second amplifier, the 3rd amplifier is in turn connected to form descending amplification link, by the 4th amplifier, second filter, second attenuator, the 5th amplifier, the 6th amplifier is in turn connected to form up amplification link, after signal and power supply enter into far-end unit, be divided into two-way, the DC power supply low pass filter of leading up to links to each other with the DC/DC unit, and the DC/DC unit is each active device power supply of far-end unit; The signal high pass filter of leading up to links to each other with a duplexer, two duplexers amplify link by up-downgoing respectively and connect into the enclosed shape loop, input power detection unit, power output detection unit, first attenuator, second attenuator link to each other with control unit respectively, the input power detection unit links to each other with the signal Coupling point of first amplifier in, and the power output detection unit links to each other with the signal Coupling point of the 3rd amplifier out.
Be used for the far-end micropower cut-in method that the mobile communication signal elevator covers, it is characterized in that carrying out according to the following steps:
The branch functions such as power that mobile communication signal one tunnel becomes multichannel are finished in the near-end unit, can be with 8 far-ends according to requirement of engineering, or 16 far-ends, 32 far-ends etc.In the near-end unit DC power supply is fed in each branch road in addition, power path increases low pass filter, and the radio-frequency channel increases high pass filter, and effectively the shielded radio frequency signal is to the interference of power supply.
After finishing the five equilibrium and DC power supply feed-in of mobile communication signal, by flexible coaxial cable mobile communication signal and DC power supply are passed to remote end module, the quantity of remote end module depends on the quantity of every building elevator, according to the way of how many reasonable disposition near-end unit of elevator.
Far-end unit is finished the extraction of DC power supply and DC/DC conversion by the DC power supply low pass filter, will from the direct current DC+24V of near-end or+48V converts to+5V, and be that each active device of far-end unit is powered.By the signal high pass filter mobile communication is extracted, be sent to descending amplification link and carry out the amplification of signal, in down link, design has descending input power detection and power output detecting circuit, power output is set in a certain value, such as 0dBm or 5dBm etc., under the control of control unit, size according to input power and power output, control the gain-adjusted that descending amplification link first attenuator carries out descending amplification link, the benefit of doing like this is exactly, can be according to the length difference of flexible cable loss, the loss difference is finished the adjustment of descending amplification link gain automatically, guarantees that far-end micropower unit down link power output remains unchanged.According to the principles and requirements that link balance is amplified in up-downgoing, can adjust the gain size of up amplification link automatically according to the gain measurement of descending amplification link.
The present invention can effectively solve the elevator covering problem, and engineering construction is simple, and cost is low, and very suitable large tracts of land is promoted.
Description of drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is a near-end of the present invention unit theory diagram.
Fig. 3 is a far-end unit theory diagram of the present invention.
Embodiment
Referring to Fig. 1, shown the system that the mobile communication signal elevator covers that is used for proposed by the invention among the figure, this system comprises with lower unit: feeder 9, near-end unit 1, coaxial cable 3, antenna integrated 4 far-end unit 2 is formed, this system comprises a near-end unit 1 at least, N root coaxial cable 3 and N far-end unit 2, the base station links to each other with the near-end unit by feeder 9, and the near-end unit links to each other with N far-end unit respectively by N root coaxial cable, and far-end unit is installed in the top of elevator, the near-end unit is installed in the place of base station information source, and near near the elevator, N is 2,4,8,16,32,
Described coaxial cable has super flexibility and anti-alternating bending, and can finish the propagation function of mobile communication signal and DC power supply;
Built-in transmitting antenna of described far-end unit and reception antenna, far-end unit can be finished DC power supply extraction and DC/DC conversion and be each active device power supply of far-end unit, finishes amplification and elevator signal covering function that link is amplified in the mobile communication signal up-downgoing;
The branch functions such as power that mobile communication signal one tunnel becomes multichannel are finished in described near-end unit, finish the function that DC power supply is fed into each branch road.
Referring to Fig. 2, from the mobile base station (such as GAM, CDMA, DCS, WCDMA, TDSCDMA etc.) signal enters near-end unit 1 by feeder 9 and links to each other with power distributing unit 14, finish the multichannel five equilibrium of signal through power distributing unit 14, can be divided into 2 the tunnel, the 4 tunnel, the 8 tunnel, the 16 tunnel, the 32 tunnel etc., every road signal behind the five equilibrium all will be connected in series a high pass filter 13, the effect of this high pass filter 13 is cut off DC power supply exactly, in case the anti-base station end that is poured into of DC power supply causes damage to the base station.After electric main 10 enters into near-end unit 1, finish the conversion of electric main by power supply unit 11 to direct current, convert AC220V to DC+24V or DC+48V, after the conversion power supply output is divided into identical way (with the way of mobile communication signal five equilibrium), on every road of direct current output, increase a low pass filter 12, the effect of this low pass filter 12 is exactly that the mobile communication signal that prevents upper frequency is crosstalked on the power supply, in order to avoid cause the interference to power supply.
Behind near-end unit 1, the mobile communication signal that carries DC power supply is delivered to far-end unit 2 by flexible coaxial cable, and through its processing such as amplification of carrying out signal, finishes the covering of elevator.
Participate in Fig. 3, signal and power supply are divided into two-way after entering into far-end unit 2, the DC power supply low pass filter 24 of leading up to enters into DC/DC unit 25, through DC/DC conversion, will from the direct current DC+24V of near-end or+48V converts to+the 5V power supply, is each active device power supply of far-end unit 2.
The signal high pass filter 22 of leading up in addition enters into movable signal and amplifies path, downstream signal is through a duplexer 23, enter into descending amplification link, cover through the amplification of first amplifier 27, first filter 28, first attenuator 29, second amplifier 30, the 3rd amplifier 31 and by the elevator that the antenna 5 of another duplexer 33 and far-end unit 2 is finished signal; The 26th, signal input Coupling point, 32 signals output Coupling point, finish the power draw of descending amplification link input signal and output signal respectively, and be sent to respectively in input power detection unit 36 and the power output detection unit 34, finish the detection of signal, convert radiofrequency signal to corresponding voltage signal, send in the control unit 35, computing by control unit, can know the size of input and output power, and compare with the output power value that sets in advance, and then control the decay size of first attenuator 29, regulate the gain of descending amplification link automatically.The benefit of doing like this is that can to guarantee that power output remains stable, can be because of flexible coaxial cable length variations between near-end unit and the far-end unit, and factor affecting power outputs such as the size of input power stable.Amplify the principle of link balance simultaneously according to the mobile communication up-downgoing, when regulating descending amplification link gain, regulate the gain of up amplification link automatically, can save some costs like this, the simplified design circuit.
In like manner, upward signal receives by the antenna 5 of far-end unit, enter into up amplification link by another duplexer 33 again, arrive near-end unit by flexible coaxial cable again through the 4th amplifier 41, second filter 40, second attenuator 39, the 5th amplifier 38, the 6th amplifier 37, a duplexer 23, signal high pass filter 22 successively, get back to the base station through feeder 9 again.
Claims (4)
1. one kind is used for the far-end micropower connecting system that the mobile communication signal elevator covers, and this system comprises a near-end unit, N root coaxial cable and N far-end unit at least, and the base station links to each other with the near-end unit by feeder, it is characterized in that: the near-end unit links to each other with N far-end unit respectively by N root coaxial cable, and far-end unit is installed in the top of elevator, and the near-end unit is installed in the place of base station information source, and near near the elevator, N is 2,4,8,16,32,
Described coaxial cable has super flexibility and anti-alternating bending, and can finish the propagation function of mobile communication signal and DC power supply;
Built-in transmitting antenna of described far-end unit and reception antenna, far-end unit can be finished DC power supply extraction and DC/DC conversion and be each active device power supply of far-end unit, finishes the amplification and the elevator signal covering function of mobile communication signal uplink and downlink signal;
The branch functions such as power that mobile communication signal one tunnel becomes multichannel are finished in described near-end unit, finish the function that DC power supply is fed into each branch road.
2. according to claim 1ly be used for the far-end micropower connecting system that the mobile communication signal elevator covers, it is characterized in that: described near-end unit comprises at least: power distributing unit, power supply unit, a N low pass filter, a N high pass filter; Signal from the mobile base station links to each other with the power distributing unit of near-end unit by the feeder line, after linking to each other with N high pass filter respectively, power distributing unit forms N output port, electric main links to each other with the power supply unit of near-end unit, form N output port after power supply unit links to each other with N low pass filter respectively, N is 2,4,8,16,32 ...
3. the far-end micropower connecting system that is used for the covering of mobile communication signal elevator according to claim 1, it is characterized in that: described far-end unit comprises at least: the signal high pass filter, the DC power supply low pass filter, the DC/DC unit, link is amplified in up-downgoing, input power detection unit and power output detection unit, control unit, two duplexers, by first amplifier, first filter, first attenuator, second amplifier, the 3rd amplifier is in turn connected to form descending amplification link, by the 4th amplifier, second filter, second attenuator, the 5th amplifier, the 6th amplifier is in turn connected to form up amplification link, after signal and power supply enter into far-end unit, be divided into two-way, the DC power supply low pass filter of leading up to links to each other with the DC/DC unit, and the DC/DC unit is each active device power supply of far-end unit; The signal high pass filter of leading up to links to each other with a duplexer, two duplexers amplify link by up-downgoing respectively and connect into the enclosed shape loop, input power detection unit, power output detection unit, first attenuator, second attenuator link to each other with control unit respectively, the input power detection unit links to each other with the signal Coupling point of first amplifier in, and the power output detection unit links to each other with the signal Coupling point of the 3rd amplifier out.
4. according to claim 1, the 2 or 3 described far-end micropower cut-in methods that are used for the covering of mobile communication signal elevator, it is characterized in that carrying out according to the following steps:
Step 1, mobile communication signal from the base station enters into the near-end unit, in the near-end unit, finish power and be divided into the N road, in the near-end unit, convert civil power to DC+24V or DC+48V direct current signal, and DC power supply is loaded on every road by N low pass filter by power supply unit by power distributing unit, N is 2,4,8,16,32,
Step 2, the mobile communication signal that carries DC power supply is delivered to each far-end unit by the coaxial cable of super flexible anti-alternating bending;
Step 3 in far-end unit inside, is finished the extraction of DC power supply, and by the DC/DC cell translation, DC power supply is converted to+5V is each active device power supply of far-end unit; The up-downgoing that mobile communication signal by the signal high pass filter enters into far-end unit is amplified link and is carried out signal and amplify, downstream signal is through a duplexer, enter into descending amplification link, cover through the amplification of first amplifier, first filter, first attenuator, second amplifier, the 3rd amplifier and by the elevator that the antenna of another duplexer, far-end unit is finished signal; The input power detection unit links to each other with the signal Coupling point of first amplifier in, the power output detection unit links to each other with the signal Coupling point of the 3rd amplifier out, finish the power draw of descending amplification link input signal and output signal respectively, and be sent to respectively in input power detection unit and the power output detection unit, finish the detection of signal, convert radiofrequency signal to corresponding voltage signal, send in the control unit, computing by control unit, know the size of input and output power, and compare with the output power value that sets in advance, and then control the decay size of first attenuator, automatically regulate the gain of descending amplification link, automatically adjust the gain size of up amplification link simultaneously according to the gain measurement of descending amplification link, the signal of realizing up amplification link amplifies, and keeps up-downgoing to amplify the balance of link.
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| CN2011102342527A CN102300219A (en) | 2011-08-16 | 2011-08-16 | Far-end micropower access system used for mobile communication signal elevator coverage and method thereof |
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| CN2011102342527A CN102300219A (en) | 2011-08-16 | 2011-08-16 | Far-end micropower access system used for mobile communication signal elevator coverage and method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102611467A (en) * | 2012-03-08 | 2012-07-25 | 魏凡杰 | Radio signal receiving system in elevator and radio signal receiving method thereof |
| CN103167514A (en) * | 2013-03-12 | 2013-06-19 | 京信通信***（广州）有限公司 | Elevator mobile communication coverage system, power controller and method |
| CN107743039A (en) * | 2017-11-18 | 2018-02-27 | 国家电网公司 | A kind of GPRS acquisition terminals signal strength self-adapting data test and transmitting device |
| CN107819476A (en) * | 2017-11-18 | 2018-03-20 | 国家电网公司 | The lightning protection antenna and system of a kind of extremely strong and pole weak signal for GPRS acquisition terminals |
| CN111247780A (en) * | 2017-10-27 | 2020-06-05 | 通力股份公司 | Elevator system with mobile communication network and method for providing mobile communication network for elevator system |
| CN113965936A (en) * | 2021-10-26 | 2022-01-21 | 广西壮族自治区通信产业服务有限公司工程分公司 | Elevator wireless communication microdistribution system |
| CN115396911A (en) * | 2022-08-19 | 2022-11-25 | 中国联合网络通信集团有限公司 | Communication method, apparatus and storage medium |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102611467A (en) * | 2012-03-08 | 2012-07-25 | 魏凡杰 | Radio signal receiving system in elevator and radio signal receiving method thereof |
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| CN111247780A (en) * | 2017-10-27 | 2020-06-05 | 通力股份公司 | Elevator system with mobile communication network and method for providing mobile communication network for elevator system |
| CN107743039A (en) * | 2017-11-18 | 2018-02-27 | 国家电网公司 | A kind of GPRS acquisition terminals signal strength self-adapting data test and transmitting device |
| CN107819476A (en) * | 2017-11-18 | 2018-03-20 | 国家电网公司 | The lightning protection antenna and system of a kind of extremely strong and pole weak signal for GPRS acquisition terminals |
| CN107743039B (en) * | 2017-11-18 | 2023-06-02 | 国家电网公司 | GPRS acquisition terminal signal strength self-adaptive data testing and transmitting device |
| CN107819476B (en) * | 2017-11-18 | 2023-08-11 | 国家电网公司 | Lightning protection antenna and system for GPRS acquisition terminal |
| CN113965936A (en) * | 2021-10-26 | 2022-01-21 | 广西壮族自治区通信产业服务有限公司工程分公司 | Elevator wireless communication microdistribution system |
| CN115396911A (en) * | 2022-08-19 | 2022-11-25 | 中国联合网络通信集团有限公司 | Communication method, apparatus and storage medium |
| CN115396911B (en) * | 2022-08-19 | 2023-06-06 | 中国联合网络通信集团有限公司 | Communication method, device and storage medium |
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Application publication date: 20111228 |