CN104486771A - Remote home-entry covering method for LTE dual-channel digital optical fiber - Google Patents
Remote home-entry covering method for LTE dual-channel digital optical fiber Download PDFInfo
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- CN104486771A CN104486771A CN201410781005.2A CN201410781005A CN104486771A CN 104486771 A CN104486771 A CN 104486771A CN 201410781005 A CN201410781005 A CN 201410781005A CN 104486771 A CN104486771 A CN 104486771A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
Abstract
The invention relates to a remote home-entry covering method for an LTE dual-channel digital optical fiber. The remote home-entry covering method comprises an uplink signal transmission step and a downlink signal transmission step. A remote digital optical fiber for LTE dual-channel signals is realized through a near-end unit, the problem that LTE signals and xPON signals are not in the same station address is solved, packaging of the LTE signals and the xPON signals is realized through an extension unit and a far-end unit, home-entry covering is carried out by utilizing an original xPON home-entry optical fiber, and home-entry covering of the LTE dual-channel signals is realized under the condition of not influencing the xPON signals. The construction problems that a traditional indoor distributed system is long in construction time and difficult for property coordination are solved; home-entry covering is carried out on the LTE dual-channel signals through the original xPON home-entry optical fiber, and thus the problems, such as indoor weak covering, ping-pong effect and pilot frequency pollution, of indoor LTE network signals are solved, and the perception of a user is improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of LTE two-channel digital fiber optic stretch and to register one's residence covering method.
Background technology
Along with the fast development of optical fiber technology, the strategy that common carrier is also taked on a communications device " light entering and copper back ".There is broadband signal in existing community, hotel, hotel, substantially adopt fiber entering household to realize xPON signal and to register one's residence covering; Country carries out " broadband China ", adopt fiber entering household to realize xPON signal and register one's residence coverage mode by large-scale promotion, the covering and traditional room subsystem is not all registered one's residence, antenna is all on house doorway, LTE double-channel signal is serious by decay during body of wall, cause indoor signal and extraneous signal field intensity to be more or less the same, produce ping-pong and pilot pollution, have a strong impact on the perception of user.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of LTE two-channel digital fiber optic stretch to register one's residence covering method, for solving the problems such as the indoor weak covering of LTE double-channel signal in prior art, ping-pong and pilot pollution.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: provide a kind of LTE two-channel digital fiber optic stretch to register one's residence covering method, comprise uplink signal transmissions step and downstream signal transmitting step;
Described downstream signal transmitting step comprises:
The downlink radio-frequency signal frequency conversion of LTE binary channels base station or LTE binary channels base station zoom out system is the descending intermediate-freuqncy signal of LTE binary channels by near-end unit;
Convert the descending intermediate-freuqncy signal of described LTE binary channels to LTE binary channels downstream digital signal;
Described LTE binary channels downstream digital signal is converted to the LTE binary channels downgoing baseband signal that CPRI mode can be adopted to transmit;
And described LTE binary channels downgoing baseband signal is converted to downlink optical signal and sends expanding element to;
The downlink optical signal received is converted to LTE binary channels downgoing baseband signal by described expanding element;
XPON downstream signal is converted to xPON downgoing baseband signal;
Trade baseband signal under LTE bilateral and xPON downgoing baseband signal are packed, and converts the signal obtained after described packing to light signal and be sent to far-end unit by optical fiber;
Described far-end unit receives light signal that expanding element sends and converts the downgoing baseband signal of LTE binary channels downgoing baseband signal and xPON downgoing baseband signal composition to;
Described downgoing baseband signals revivification is become LTE binary channels downstream digital signal and xPON downstream signal;
Described xPON downstream signal is sent to light Modem, converts LTE binary channels downstream digital signal to LTE binary channels descending intermediate-freuqncy signal through D/A converting circuit;
The descending intermediate-freuqncy signal of described LTE binary channels is converted to LTE binary channels downlink radio-frequency signal;
And outwards launched by retransmitting antenna after described LTE binary channels downlink radio-frequency signal is carried out power amplification the area of coverage is covered;
Described uplink signal transmissions step comprises:
Far-end unit receives LTE binary channels upstream radio-frequency signal by retransmitting antenna, and LTE binary channels upstream radio-frequency signal is carried out noise reduction and power amplification;
LTE binary channels upstream radio-frequency signal after noise reduction and power amplification is down-converted to the up intermediate-freuqncy signal of LTE binary channels;
Up for LTE binary channels intermediate-freuqncy signal is converted to LTE binary channels digital uplink signal;
LTE binary channels digital uplink signal and xPON upward signal are converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal, and LTE binary channels uplink baseband signal and xPON uplink baseband signal are packed, convert light signal to by optical transceiver after packing and send to expanding element by optical fiber;
Described expanding element receives the light signal that far-end unit sends, and this light signal is converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal composition uplink baseband signal;
Described LTE binary channels uplink baseband signal is become LTE binary channels uplink baseband signal and xPON upward signal with xPON uplink baseband signals revivification;
And LTE binary channels uplink baseband signal is converted to digital optical signal and is sent to near-end unit, xPON signal is sent to OLT;
Described near-end unit receives the light signal that expanding element sends, and this light signal is converted to LTE binary channels uplink baseband signal;
Described LTE binary channels uplink baseband signals revivification is become LTE binary channels digital uplink signal, and changes the up intermediate-freuqncy signal of LTE binary channels into by DAC D/A converting circuit;
The up intermediate-freuqncy signal of described LTE binary channels is up-converted to LTE binary channels upstream radio-frequency signal, and is sent to described LTE binary channels base station or LTE binary channels base station zoom out system by duplexer.
Beneficial effect of the present invention is: be different from LTE double-channel signal in prior art and there is indoor weak covering, the problem such as ping-pong and pilot pollution, the present invention realizes the digital optical fiber remote of LTE double-channel signal by near-end unit, solve LTE double-channel signal and xPON signal not in the problem of same site, the packing of LTE double-channel signal and xPON signal is realized by expanding element and far-end unit, and utilize original xPON Drop cable to carry out covering of registering one's residence, do not affecting under xPON signal, realize the covering of registering one's residence of LTE double-channel signal simultaneously, overcome traditional indoor distributed system engineering time long, the construction difficult problems such as property difficult coordination, LTE double-channel signal enters indoor by former original xPON Drop cable and covers, thus solves the problems such as the indoor weak covering of indoor LTE double-channel signal, ping-pong and pilot pollution, improves the perception of user.
Accompanying drawing explanation
Fig. 1 is that in embodiment of the present invention, LTE two-channel digital fiber optic stretch is registered one's residence the structured flowchart of covering system;
Fig. 2 is the structured flowchart of near-end unit in embodiment of the present invention;
Fig. 3 is the structured flowchart of expanding element in embodiment of the present invention;
Fig. 4 is the structured flowchart of far-end unit in embodiment of the present invention;
Fig. 5 is the catenation principle block diagram of near-end unit, expanding element and far-end unit in embodiment of the present invention.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
Explanation of nouns
XPON: as optical fiber access technology of new generation, in anti-interference, bandwidth characteristic, access distance, maintenance management etc., all there is huge advantage, its application obtains showing great attention to of global operator, EPON and GPON of comparative maturity in xPON soft exchange technology, is all made up of local side OLT, user side ONU equipment and passive optical distribution network ODN.Wherein ODN network and equipment are the important rings in xPON Integrated access, relate to establishment and the application of brand-new fiber optic network, relevant ODN equipment and networking cost, have become the key factor of restriction xPON application.XPON technology generally good in the industry at present has EPON and GPON.
LTE:(Long Term Evolution, Long Term Evolution) project is the evolution of 3G, LTE is not the 4G technology that people generally misread, but a transition between 3G and 4G technology, the global standards of 3.9G, it improves and enhances the aerial access technology of 3G, adopts OFDM and MIMO as the sole criterion of its wireless network evolution, and this is that the technology of core can be counted as " accurate 4G " technology with OFDM/FDMA.The peak rate of descending 100Mbit/s and up 50Mbit/s can be provided under 20MHz spectral bandwidth.Improve the performance of Cell Edge User, improve cell capacity and reduce system delay.
Duplexer: the key fitment being alien frequencies two-way radios, trunk desk, its effect is by isolated for transmitting and receiving signal, ensures to receive and launch and can normally work simultaneously.General duplexer is made up of six band stop filters (trapper), and each resonance is in transmitting and receiving frequency.
Fiber optical transceiver: i.e. optical transceiver, is the Ethernet transmission medium converting unit that a kind of light signal by short-range twisted pair telecommunications number and long distance carries out exchanging, is also referred to as optical-electrical converter (Fiber Converter) in a lot of place.Product is generally applied in that Ethernet cable cannot cover, in the real network environment that must use optical fiber to extend transmission distance, and be usually positioned the Access Layer application of broadband metropolitan area network; Also played huge effect in help on optical fiber last one kilometer connection to metropolitan area network and more outer field network simultaneously.
The design of most critical of the present invention is: utilize the original Drop cable of xPON signal to transmit LTE double-channel signal and xPON signal simultaneously, realize the covering of registering one's residence of LTE double-channel signal and xPON signal simultaneously, solve the problems such as the indoor weak covering of LTE double-channel signal, ping-pong and pilot pollution, improve the perception of user.
Please refer to Fig. 1 to Fig. 5, a kind of LTE two-channel digital fiber optic stretch is registered one's residence covering method, comprises uplink signal transmissions step and downstream signal transmitting step;
Described downstream signal transmitting step comprises:
The downlink radio-frequency signal frequency conversion of LTE binary channels base station or LTE binary channels base station zoom out system is the descending intermediate-freuqncy signal of LTE binary channels by near-end unit;
Convert the descending intermediate-freuqncy signal of described LTE binary channels to LTE binary channels downstream digital signal;
Described LTE binary channels downstream digital signal is converted to the LTE binary channels downgoing baseband signal that CPRI mode can be adopted to transmit;
And described LTE binary channels downgoing baseband signal is converted to downlink optical signal and sends expanding element to;
The downlink optical signal received is converted to LTE binary channels downgoing baseband signal by described expanding element;
XPON downstream signal is converted to xPON downgoing baseband signal;
Trade baseband signal under LTE bilateral and xPON downgoing baseband signal are packed, and converts the signal obtained after described packing to light signal and be sent to far-end unit by optical fiber;
Described far-end unit receives light signal that expanding element sends and converts the downgoing baseband signal of LTE binary channels downgoing baseband signal and xPON downgoing baseband signal composition to;
Described downgoing baseband signals revivification is become LTE binary channels downstream digital signal and xPON downstream signal;
Described xPON downstream signal is sent to light Modem, converts LTE binary channels downstream digital signal to LTE binary channels descending intermediate-freuqncy signal through D/A converting circuit;
The descending intermediate-freuqncy signal of described LTE binary channels is converted to LTE binary channels downlink radio-frequency signal;
And outwards launched by retransmitting antenna after described LTE binary channels downlink radio-frequency signal is carried out power amplification the area of coverage is covered;
Described uplink signal transmissions step comprises:
Far-end unit receives LTE binary channels upstream radio-frequency signal by retransmitting antenna, and LTE binary channels upstream radio-frequency signal is carried out noise reduction and power amplification;
LTE binary channels upstream radio-frequency signal after noise reduction and power amplification is down-converted to the up intermediate-freuqncy signal of LTE binary channels;
Up for LTE binary channels intermediate-freuqncy signal is converted to LTE binary channels digital uplink signal;
LTE binary channels digital uplink signal and xPON upward signal are converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal, and LTE binary channels uplink baseband signal and xPON uplink baseband signal are packed, convert light signal to by optical transceiver after packing and send to expanding element by optical fiber;
Described expanding element receives the light signal that far-end unit sends, and this light signal is converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal composition uplink baseband signal;
Described LTE binary channels uplink baseband signal is become LTE binary channels uplink baseband signal and xPON upward signal with xPON uplink baseband signals revivification;
And LTE binary channels uplink baseband signal is converted to digital optical signal and is sent to near-end unit, xPON signal is sent to OLT;
Described near-end unit receives the light signal that expanding element sends, and this light signal is converted to LTE binary channels uplink baseband signal;
Described LTE binary channels uplink baseband signals revivification is become LTE binary channels digital uplink signal, and changes the up intermediate-freuqncy signal of LTE binary channels into by DAC D/A converting circuit;
The up intermediate-freuqncy signal of described LTE binary channels is up-converted to LTE binary channels upstream radio-frequency signal, and is sent to described LTE binary channels base station or LTE binary channels base station zoom out system by duplexer.
Refer to Fig. 1, LTE two-channel digital fiber optic stretch of the present invention covering method of registering one's residence is applied to LET two-channel digital fiber optic stretch and registers one's residence covering system, this system comprises base station, near-end unit, a plurality of expanding element and a plurality of far-end unit, the input of described near-end unit is provided with two ports (i.e. the input port of first duplexer and the second duplexer), two-port is coupled with LTE binary channels base station or LTE binary channels base station zoom out system respectively, the output of described near-end unit comprises a plurality of optical fiber interface (i.e. the first optical transceiver), one end of described expanding element is provided with two optical fiber interfaces (i.e. the second optical transceiver and the 3rd optical transceiver), first optical transceiver is connected with the optical fiber interface (i.e. the second optical transceiver) of described a plurality of expanding element by optical fiber, 3rd optical transceiver is connected with OLT by optical fiber, the output of described expanding element comprises a plurality of optical fiber interface (i.e. the 4th transceiver), and be connected (i.e. the 5th optical transceiver) with the optical fiber interface of described a plurality of expansion far-end unit by optical fiber, another optical fiber interface (i.e. the 6th optical transceiver) of described far-end unit is connected with light Modem by optical fiber, described far-end unit output end is provided with two retransmitting antenna (i.e. the first hair tonic antenna and the second retransmitting antenna), in order to cover zooming out the radiofrequency signal after amplification the area of coverage.
In Fig. 1, the operation principle of unit is described as follows:
As shown in Figure 2, near-end unit in the downlink for by the downlink radio-frequency signal of LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2 (i.e. first duplexer and the second duplexer) enters near-end lower frequency changer circuit 1 respectively, near-end lower frequency changer circuit 2 (i.e. the first near-end frequency converter and the second near-end frequency converter), down-convert to the descending intermediate-freuqncy signal of LTE binary channels respectively, the descending intermediate-freuqncy signal of LTE binary channels enters ADC analog to digital conversion circuit (i.e. the D and D/A converter of near-end unit) and converts LTE binary channels downstream digital signal to, LTE binary channels downstream digital signal is after near-end baseband processing circuitry (i.e. near-end processor) process, convert the LTE binary channels downgoing baseband signal that CPRI mode can be adopted to transmit to, light signal is converted to through optical transceiver 1 (i.e. the first optical transceiver), some described expanding elements are sent to by optical fiber.Described near-end unit receives the light signal transmitted from expanding element in the uplink by optical fiber, this light signal converts LTE binary channels uplink baseband signal to through optical transceiver 1 (i.e. the first optical transceiver), baseband signal is after the process of near-end baseband processing circuitry, be reduced into LTE binary channels digital uplink signal, the up intermediate-freuqncy signal of LTE binary channels is converted to through DAC D/A converting circuit (i.e. the D and D/A converter of near-end unit), through near-end up-converter circuit 1, near-end up-converter circuit 2 (i.e. the first near-end frequency converter and the second near-end frequency converter) up-converts to LTE binary channels upstream radio-frequency signal, through duplexer 1, duplexer 2 (i.e. first duplexer and the second duplexer) is sent to described LTE binary channels base station or LTE binary channels base station zoom out system.
As shown in Figure 3, expanding element receives by optical fiber the light signal that near-end unit sends in the downlink, LTE binary channels downgoing baseband signal is converted to through optical transceiver 2 (i.e. the second optical transceiver), xPON downstream signal converts xPON downgoing baseband signal to after expansion base tape handling processing of circuit, and LTE binary channels downgoing baseband signal and xPON downgoing baseband signal are packed, convert light signal to through optical transceiver 4 (i.e. the 4th optical transceiver) and be sent to far-end unit by optical fiber.Described expanding element receives by optical fiber the light signal that distally unit transmits in the uplink, this light signal converts LTE binary channels uplink baseband signal and xPON uplink baseband signal packing composition uplink baseband signal to through optical transceiver 4 (i.e. the 4th optical transceiver), after expansion base tape handling processing of circuit, be reduced into LTE binary channels uplink baseband signal and xPON upward signal, LTE binary channels uplink baseband signal converts digital optical signal to through optical transceiver 2 (namely the early optical transceiver) and is sent to described near-end unit by optical fiber, xPON signal returns OLT.
As shown in Figure 4, far-end unit receives the light signal that sends of expanding element by optical fiber in the downlink, the downgoing baseband signal of LTE binary channels downgoing baseband signal and xPON downgoing baseband signal packing composition is converted to through optical transceiver 5 (i.e. the 5th optical transceiver), after the process of far-end baseband processing circuitry, be reduced into LTE binary channels downstream digital signal and xPON downstream signal, LTE binary channels downstream digital signal converts the descending intermediate-freuqncy signal of LTE binary channels to through D/A converting circuit (D and D/A converter of far-end unit), the descending intermediate-freuqncy signal of LTE binary channels up-converts to LTE binary channels downlink radio-frequency signal through far-end up-converter circuit 1 and far-end up-converter circuit 2 (i.e. the first far-end frequency converter and the second far-end frequency converter) respectively, after power amplification circuit 1 and power amplification circuit 2 (i.e. the first power amplifier LNA integrated module and the second power amplifier LNA integrated module) amplify respectively, through duplexer 3, duplexer 4 (i.e. the first duplexer of far-end unit and the second duplexer) also covers the area of coverage respectively by retransmitting antenna 1 and retransmitting antenna 2 (i.e. the first hair tonic antenna and the second retransmitting antenna), xPON signal is sent to light Modem.
The LTE binary channels upstream radio-frequency signal that described far-end unit receives respectively by retransmitting antenna 1 and retransmitting antenna 2 (i.e. the first hair tonic antenna and the second retransmitting antenna) in up link, this LTE binary channels upward signal is through duplexer 3, duplexer 4 (i.e. the first duplexer of far-end unit and the second duplexer) enters power amplifier LNA integrated module 1 and power amplifier LNA integrated module 2 (i.e. the first power amplifier LNA integrated module and the second power amplifier LNA integrated module) respectively, far-end lower frequency changer circuit 1 is entered respectively after low noise amplifier circuit amplifies, far-end lower frequency changer circuit 2 (i.e. the first far-end frequency converter and the second far-end frequency converter) down-converts to the up intermediate-freuqncy signal of LTE binary channels, the up intermediate-freuqncy signal of LTE binary channels is converted to LTE binary channels digital uplink signal through ADC analog-to-digital conversion module (i.e. the D and D/A converter of far-end unit), LTE binary channels digital uplink signal and xPON signal are after the process of far-end baseband processing circuitry, LTE binary channels digital uplink signal and xPON upward signal are converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal, and by LTE binary channels uplink baseband signal and the packing of xPON uplink baseband signal, convert light signal to through optical transceiver 5 (the 5th optical transceiver) and be sent to described expanding element by optical fiber.
From foregoing description, beneficial effect of the present invention is: be different from LTE double-channel signal in prior art and there is indoor weak covering, the problem such as ping-pong and pilot pollution, the present invention realizes the digital optical fiber remote of LTE double-channel signal by near-end unit, solve LTE double-channel signal and xPON signal not in the problem of same site, the packing of LTE double-channel signal and xPON signal is realized by expanding element and far-end unit, and utilize original xPON Drop cable to carry out covering of registering one's residence, do not affecting under xPON signal, realize the covering of registering one's residence of LTE double-channel signal simultaneously.Tradition indoor distributed system antenna all cloth be placed on outside room or porch, signal need penetrate body of wall just can pass to indoor, signal attenuation is larger, and outdoor macro station signal also can penetrate window or body of wall enters indoor, the level of the signal of indoor distributed system and outdoor macro station signal is caused to be more or less the same, thus produce pilot pollution and ping-pong, affect user awareness, and coverage mode of registering one's residence signal is directly sent to indoor, without body of wall loss, improve the level of signal of registering one's residence, the signal that makes to register one's residence becomes indoor main signal (signal level of namely registering one's residence is the strongest), overcome traditional indoor distributed system engineering time long, the construction difficult problems such as property difficult coordination, LTE double-channel signal enters indoor by former original xPON Drop cable and covers, thus solves the problems such as the indoor weak covering of indoor LTE double-channel signal, ping-pong and pilot pollution, improves the perception of user.
Further, in the present embodiment, described near-end unit sends downlink optical signal to two or more expanding element simultaneously, and expanding element sends light signal to two or more far-end unit.
Further, in the present embodiment, described far-end unit carries out power amplification by power amplifier LNA integrated module to described LTE binary channels downlink radio-frequency signal.
Further, in the present embodiment, described far-end unit is provided with the first retransmitting antenna and the second retransmitting antenna, by the first retransmitting antenna and the second retransmitting antenna, LTE binary channels downlink radio-frequency signal is outwards launched covering signal coverage.
Further, LTE two-channel digital fiber optic stretch of the present invention is registered one's residence in covering method, is binary channels unit, is provided with up link and down link in described near-end unit, expanding element and far-end unit.
The duplexer 1 of near-end unit, duplexer 2, near-end lower frequency changer circuit 1, near-end lower frequency changer circuit 2, ADC analog to digital conversion circuit and near-end Digital IF processing unit are connected with optical transceiver 1 composition LTE double-channel downlink; Described optical transceiver 1, near-end Digital IF processing unit, DAC D/A converting circuit, near-end up-converter circuit 1, near-end up-converter circuit 2, duplexer 1 are connected with duplexer 2 and form LTE double-channel uplink.
Described near-end data intermediate frequency module comprises one modulus/D/A converting circuit, a baseband processing circuitry and an optical transceiver, and described modulus/D/A converting circuit, baseband processing circuitry are connected with optical transceiver and form LTE double-channel downlink; Optical transceiver, baseband processing circuitry are connected with modulus/D/A converting circuit and form LTE double-channel uplink.
The optical transceiver 2 of described expanding element, expansion base tape handling are connected with optical transceiver 4 and form LTE double-channel downlink; Optical transceiver 4, expansion base tape handling and optical transceiver 2 are connected and form LTE double-channel uplink; Optical transceiver 3, expansion base tape handling and optical transceiver 4 are connected and form xPON signal downlink link; Optical transceiver 4, one expansion base tape handling is connected with optical transceiver 3 and forms xPON signal uplink link.
The transceiver 5 of described far-end unit, far-end baseband processing circuitry, DAC D/A converting circuit, far-end up-converter circuit 1, far-end up-converter circuit 2, power amplifier LNA integrated module 1, power amplifier LNA integrated module 2, duplexer 1 are connected with duplexer 2 and form LTE double-channel downlink; Described duplexer 1, duplexer 2, power amplifier LNA integrated module 1, power amplifier LNA integrated module 2, far-end lower frequency changer circuit 1, far-end lower frequency changer circuit 2, ADC analog to digital conversion circuit, far-end baseband processing circuitry are connected with optical transceiver 5 and form LTE double-channel uplink; Described optical transceiver 5, far-end baseband processing circuitry are connected with optical transceiver 6 and form xPON signal downlink link; Described optical transceiver 6, far-end baseband processing circuitry are connected with optical transceiver 5 and form xPON signal uplink link.
Please refer to Fig. 5, embodiments of the invention one are: a kind of LTE two-channel digital fiber optic stretch is registered one's residence covering method, comprises uplink signal transmissions step and downstream signal transmitting step, wherein, downstream signal presses downlink direction transmission, and upward signal presses uplink direction transmission;
As shown in Figure 5, down link is: the down link of near-end unit is used for the downlink radio-frequency signal of LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1 (i.e. first duplexer), duplexer 2 (i.e. the second duplexer) enters near-end lower frequency changer circuit 1 and near-end lower frequency changer circuit 2 respectively, downlink radio-frequency signal is down-converted to the descending intermediate-freuqncy signal of LTE binary channels by near-end lower frequency changer circuit 1 and near-end lower frequency changer circuit 2 respectively, the descending intermediate-freuqncy signal of LTE binary channels enters ADC analog to digital conversion circuit and converts LTE binary channels downstream digital signal to, LTE binary channels downstream digital signal is after the process of near-end baseband processing circuitry, convert the LTE binary channels downgoing baseband signal that CPRI mode can be adopted to transmit to, LTE binary channels downgoing baseband signal converts light signal to through optical transceiver 1 (i.e. the first optical transceiver), described light signal is sent to some described expanding elements by optical fiber, expanding element converts through optical transceiver 2 (i.e. the second optical transceiver) light signal received to LTE binary channels downgoing baseband signal in the downlink, xPON downstream signal converts xPON downgoing baseband signal to after expansion base tape handling processing of circuit, and LTE binary channels downgoing baseband signal and xPON downgoing baseband signal are packed, convert light signal to through optical transceiver 4 (i.e. the 4th optical transceiver) and be sent to far-end unit by optical fiber, the light signal received is converted to the downgoing baseband signal of LTE binary channels downgoing baseband signal and xPON downgoing baseband signal packing composition by far-end unit in the downlink through optical transceiver 5 (i.e. the 5th optical transceiver), downgoing baseband signal is reduced into LTE binary channels downstream digital signal and xPON downstream signal after the process of far-end baseband processing circuitry, LTE binary channels downstream digital signal converts the descending intermediate-freuqncy signal of LTE binary channels to through D/A converting circuit (i.e. the D and D/A converter of far-end unit), the descending intermediate-freuqncy signal of LTE binary channels up-converts to LTE binary channels downlink radio-frequency signal through far-end up-converter circuit 1 (i.e. the first far-end frequency converter of far-end unit) and far-end up-converter circuit 2 (i.e. the second far-end frequency converter of far-end unit) respectively, after power amplification circuit 1 and power amplification circuit 2 (i.e. the first power amplifier LNA integrated module of far-end unit and the second power amplifier LNA integrated module) amplify respectively, through duplexer 3, duplexer 4 (i.e. the first duplexer of far-end unit and the second duplexer) also covers the area of coverage respectively by retransmitting antenna 1 and retransmitting antenna 2 (i.e. the first retransmitting antenna and the second retransmitting antenna), xPON signal is sent to light Modem.
Up link is: far-end unit Tong Guo the LTE binary channels upstream radio-frequency signal that receives of retransmitting antenna 1 and retransmitting antenna 2 (i.e. the first hair tonic antenna and the second retransmitting antenna) in up link, this LTE binary channels upward signal is through duplexer 3, duplexer 4 (first duplexer of far-end unit and the second duplexer) enters power amplifier LNA integrated module 1 respectively, power amplifier LNA integrated module 2 (the first power amplifier LNA integrated module and the second power amplifier LNA integrated module), far-end lower frequency changer circuit 1 is entered respectively after low noise amplifier circuit amplifies, far-end lower frequency changer circuit 2 (i.e. the first far-end frequency converter and the second far-end frequency converter) down-converts to the up intermediate-freuqncy signal of LTE binary channels, the up intermediate-freuqncy signal of LTE binary channels is converted to LTE binary channels digital uplink signal through ADC analog-to-digital conversion module (i.e. the D and D/A converter of far-end unit), LTE binary channels digital uplink signal and xPON signal are through far-end baseband processing circuitry) process after, LTE binary channels digital uplink signal and xPON upward signal are converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal, and by LTE binary channels uplink baseband signal and the packing of xPON uplink baseband signal, convert light signal to through optical transceiver 5 (i.e. the 5th optical transceiver) and be sent to described expanding element by optical fiber, expanding element receives by optical fiber the light signal that distally unit transmits in the uplink, this light signal converts LTE binary channels uplink baseband signal and xPON uplink baseband signal packing composition uplink baseband signal to through optical transceiver 4 (i.e. the 4th optical transceiver), after expansion base tape handling processing of circuit, be reduced into LTE binary channels uplink baseband signal and xPON upward signal, LTE binary channels uplink baseband signal converts digital optical signal to through optical transceiver 2 (i.e. the second optical transceiver) and is sent to described near-end unit by optical fiber, and xPON signal returns OLT, near-end unit receives the light signal transmitted from expanding element in the uplink by optical fiber, this light signal converts LTE binary channels uplink baseband signal to through optical transceiver 1 (i.e. the first optical transceiver), baseband signal is after the process of near-end baseband processing circuitry, be reduced into LTE binary channels digital uplink signal, the up intermediate-freuqncy signal of LTE binary channels is converted to through DAC D/A converting circuit (i.e. the D and D/A converter of near-end unit), through near-end up-converter circuit 1, near-end up-converter circuit 2 (i.e. the first near-end frequency converter and the second near-end frequency converter) up-converts to LTE binary channels upstream radio-frequency signal, through duplexer 1, duplexer 2 (i.e. the first duplexer of near-end unit and the second duplexer) is sent to described LTE binary channels base station or LTE binary channels base station zoom out system.
In sum, LTE two-channel digital fiber optic stretch provided by the invention covering method of registering one's residence utilizes original xPON Drop cable to carry out covering of registering one's residence, do not affecting under xPON signal, realize the covering of registering one's residence of LTE double-channel signal simultaneously, overcome traditional indoor distributed system engineering time long, the construction difficult problems such as property difficult coordination; LTE double-channel signal enters indoor by original xPON Drop cable and covers, thus solves the problems such as weak covering in indoor LTE network signal cabin, ping-pong and pilot pollution, improves the perception of user.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. LTE two-channel digital fiber optic stretch is registered one's residence a covering method, it is characterized in that, comprises uplink signal transmissions step and downstream signal transmitting step;
Described downstream signal transmitting step comprises:
The downlink radio-frequency signal frequency conversion of LTE binary channels base station or LTE binary channels base station zoom out system is the descending intermediate-freuqncy signal of LTE binary channels by near-end unit;
Convert the descending intermediate-freuqncy signal of described LTE binary channels to LTE binary channels downstream digital signal;
Described LTE binary channels downstream digital signal is converted to the LTE binary channels downgoing baseband signal that CPRI mode can be adopted to transmit;
And described LTE binary channels downgoing baseband signal is converted to downlink optical signal and sends expanding element to;
The downlink optical signal received is converted to LTE binary channels downgoing baseband signal by described expanding element;
XPON downstream signal is converted to xPON downgoing baseband signal;
Trade baseband signal under LTE bilateral and xPON downgoing baseband signal are packed, and converts the signal obtained after described packing to light signal and be sent to far-end unit by optical fiber;
Described far-end unit receives light signal that expanding element sends and converts the downgoing baseband signal of LTE binary channels downgoing baseband signal and xPON downgoing baseband signal composition to;
Described downgoing baseband signals revivification is become LTE binary channels downstream digital signal and xPON downstream signal;
Described xPON downstream signal is sent to light Modem, converts LTE binary channels downstream digital signal to LTE binary channels descending intermediate-freuqncy signal through D/A converting circuit;
The descending intermediate-freuqncy signal of described LTE binary channels is converted to LTE binary channels downlink radio-frequency signal;
And outwards launched by retransmitting antenna after described LTE binary channels downlink radio-frequency signal is carried out power amplification the area of coverage is covered;
Described uplink signal transmissions step comprises:
Far-end unit receives LTE binary channels upstream radio-frequency signal by retransmitting antenna, and LTE binary channels upstream radio-frequency signal is carried out noise reduction and power amplification;
LTE binary channels upstream radio-frequency signal after noise reduction and power amplification is down-converted to the up intermediate-freuqncy signal of LTE binary channels;
Up for LTE binary channels intermediate-freuqncy signal is converted to LTE binary channels digital uplink signal;
LTE binary channels digital uplink signal and xPON upward signal are converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal, and LTE binary channels uplink baseband signal and xPON uplink baseband signal are packed, convert light signal to by optical transceiver after packing and send to expanding element by optical fiber;
Described expanding element receives the light signal that far-end unit sends, and this light signal is converted to LTE binary channels uplink baseband signal and xPON uplink baseband signal composition uplink baseband signal;
Described LTE binary channels uplink baseband signal is become LTE binary channels uplink baseband signal and xPON upward signal with xPON uplink baseband signals revivification;
And LTE binary channels uplink baseband signal is converted to digital optical signal and is sent to near-end unit, xPON signal is sent to OLT;
Described near-end unit receives the light signal that expanding element sends, and this light signal is converted to LTE binary channels uplink baseband signal;
Described LTE binary channels uplink baseband signals revivification is become LTE binary channels digital uplink signal, and changes the up intermediate-freuqncy signal of LTE binary channels into by DAC D/A converting circuit;
The up intermediate-freuqncy signal of described LTE binary channels is up-converted to LTE binary channels upstream radio-frequency signal, and is sent to described LTE binary channels base station or LTE binary channels base station zoom out system by duplexer.
2. LTE two-channel digital fiber optic stretch according to claim 1 is registered one's residence covering method, it is characterized in that, is binary channels unit, is provided with up link and down link in described near-end unit, expanding element and far-end unit.
3. LTE two-channel digital fiber optic stretch according to claim 2 is registered one's residence covering method, and it is characterized in that, described near-end unit sends downlink optical signal to two or more expanding element simultaneously, and expanding element sends light signal to two or more far-end unit.
4. LTE two-channel digital fiber optic stretch according to claim 2 is registered one's residence covering method, and it is characterized in that, described far-end unit carries out power amplification by power amplifier LNA integrated module to described LTE binary channels downlink radio-frequency signal.
5. the LTE two-channel digital fiber optic stretch according to Claims 2 or 3 is registered one's residence covering method, it is characterized in that, described far-end unit is provided with the first retransmitting antenna and the second retransmitting antenna, by the first retransmitting antenna and the second retransmitting antenna, LTE binary channels downlink radio-frequency signal is outwards launched the covering area of coverage.
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