CN102281548A - Frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system - Google Patents

Frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system Download PDF

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Publication number
CN102281548A
CN102281548A CN 201110218430 CN201110218430A CN102281548A CN 102281548 A CN102281548 A CN 102281548A CN 201110218430 CN201110218430 CN 201110218430 CN 201110218430 A CN201110218430 A CN 201110218430A CN 102281548 A CN102281548 A CN 102281548A
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CN
China
Prior art keywords
frequency
signal
antenna
changer circuit
active
Prior art date
Application number
CN 201110218430
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Chinese (zh)
Inventor
赵自平
朱雪田
鲁娜
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深圳市云海通讯股份有限公司
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Application filed by 深圳市云海通讯股份有限公司 filed Critical 深圳市云海通讯股份有限公司
Priority to CN 201110218430 priority Critical patent/CN102281548A/en
Publication of CN102281548A publication Critical patent/CN102281548A/en
Priority claimed from JP2014517436A external-priority patent/JP2014520492A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/085Access point devices with remote components

Abstract

The invention is applicable to the technical field of communication and provides a frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system. The FDD-LTE indoor coverage system comprises an indoor distribution system, and an active access host and an active antenna which are connected with two ends of the indoor distribution system and are used for transmitting uplink/downlink signals, wherein the downlink signal is transmitted, the active access host converts the frequency of the downlink signal and sends the downlink signal to the active antenna through the indoor distribution system, and the active antenna restores the converted frequency of the downlink signal and sends the downlink signal; and when the uplink signal is transmitted, the active antenna converts the frequency of the uplink signal and sends the uplink signal to the active access host through the indoor distribution system, and the active access host restores the converted frequency of the uplink signal and sends the uplink signal to a base station. A multiple input multiple output (MIMO) technology of the FDD-LTE is realized under the condition that the routing of the conventional indoor coverage system is not required to be changed.

Description

A kind of FDD-LTE indoor covering system

Technical field

The invention belongs to communication technical field, relate in particular to a kind of FDD-LTE indoor covering system.

Background technology

At present, no matter be 2G communication or 3G communication, its indoor covering system all is the single channel wires design, promptly singly go into singly (single-input and single-output, SISO), yet, emergence along with 4G communication, it has slowly occupied the increasing market share, the network popularity rate is also more and more higher, the 4G network is being carried out in the process of the network optimization, and the most important point is to realize multiple-input, multiple-output (the multiple-input and multiple-output of 4G communication, MIMO) technology promptly must reach the two-way indoor signal and cover in indoor covering system.

If according to traditional design method, perhaps abandon existing SISO indoor covering system, rearrange the brand-new circuit of two covers, perhaps on the basis of an existing cover circuit, increase a cover circuit newly, the high problem of improvement cost appears in the capital, also easily existing property is brought influence simultaneously, it is big to transform difficulty.

Summary of the invention

The purpose of the embodiment of the invention is to provide a kind of FDD-LTE indoor covering system, the problem that must transform original circuit when being intended to solve current structure FDD-LTE indoor covering system.

The embodiment of the invention is to realize like this, a kind of FDD-LTE indoor covering system, comprise the chamber subsystem, described system also comprises active access main frame and the active antenna that is connected to subsystem two ends, described chamber, described active access main frame and described active antenna are used for parallel transmission two-way uplink/downlink signals

When transmission of downlink signal, described active access main frame is sent to described active antenna with one road downstream signal frequency conversion by described chamber subsystem, and described active antenna recovers this downstream signal to launch after the frequency conversion; When transmission during upward signal, described active antenna will be gone signal frequency conversion on the way, be sent to described active access main frame by described chamber subsystem, and described active access main frame is sent to the base station after with this upward signal recovery frequency conversion.

Another purpose of the embodiment of the invention is to provide a kind of method that adopts aforesaid FDD-LTE indoor covering system to carry out the downstream signal transmission, and described method comprises the steps:

Receive first downstream signal and second downstream signal simultaneously from the information source end;

With the second downstream signal frequency conversion, and be sent to the chamber subsystem after closing the road with first downstream signal;

Second downstream signal is recovered frequency conversion, from second antenna, launch, simultaneously first downstream signal is launched from first antenna.

Another purpose of the embodiment of the invention is to provide a kind of method that adopts aforesaid FDD-LTE indoor covering system to carry out the downstream signal transmission, and described method comprises the steps:

First antenna receives first upward signal, and second antenna receives second upward signal simultaneously;

With the second upward signal frequency conversion, and be sent to the chamber subsystem after closing the road with first upward signal;

Second upward signal is recovered frequency conversion, send, simultaneously first upward signal is sent from the first transmitting-receiving port from the second transmitting-receiving port.

The embodiment of the invention is based on the FDD-LTE network, by in existing indoor covering system, increasing active access main frame, and original indoor cover antenna replaced with active antenna, thereby do under the situation of any change not needing wiring existing indoor covering system, realize the MIMO technology of FDD-LTE simply, easily, given full play to the advantage of FDD-LTE technology.

Description of drawings

Fig. 1 is the structure chart of the indoor covering system that is applicable to the SISO technology that provides of prior art;

Fig. 2 is the structure chart of the FDD-LTE indoor covering system that provides of first embodiment of the invention;

Fig. 3 is the structure chart of the FDD-LTE indoor covering system that provides of second embodiment of the invention;

Fig. 4 is the FDD-LTE indoor covering system downstream signal transmission method flow chart that third embodiment of the invention provides;

Fig. 5 is the FDD-LTE indoor covering system uplink signal transmission method flow chart that fourth embodiment of the invention provides.

Embodiment

In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

Fig. 1 shows the structure of the existing indoor covering system that is only applicable to the SISO technology, as can be seen, prior art has adopted the single channel wires design, constituted the indoor covering system of prior art by indoor signal compartment system (chamber subsystem) 11 and single indoor cover antenna 12, (remote RF unit, the upward signal that downstream signal RRU) reaches from indoor cover antenna all can only transmit by single line from information source end FDD-LTE far-end RF module.And the embodiment of the invention is based on the FDD-LTE network, by in existing indoor covering system as shown in Figure 1, increasing active access main frame, and original indoor cover antenna replaced with active antenna, thereby do under the situation of any change not needing wiring existing indoor covering system, realize the MIMO technology of FDD-LTE simply, easily, given full play to the advantage of FDD-LTE technology.

Fig. 2 illustrates the structure of the FDD-LTE indoor covering system that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.

As shown in Figure 2, this FDD-LTE indoor covering system possesses first transmission line and second transmission line, simultaneously transmitting two paths up/descending signal, wherein, first transmission line is original indoor covering system signal transmission path, promptly " the information source end<-the chamber subsystem<-indoor cover antenna " transmission path, and in second transmission line, the indoor covering system of present embodiment is by increasing corresponding frequency-conversion processing in module, the signal that transmits in the signal of its transmission and first transmission line is carried out physical isolation, input and output simultaneously when having realized two paths of signals.

Particularly, except comprising original chamber subsystem 21, this indoor covering system has also comprised:

The active access main frame 22 that is connected with an end of chamber subsystem 21;

Be connected with the other end of chamber subsystem 21, be used to replace the active antenna 23 of original indoor cover antenna, and the installation dimension of active antenna 23 is identical with traditional antenna, to realize the compatibility of system.

In the present embodiment, first transmission line and second transmission line have been included in active access main frame 22 and the active antenna 23.Active access main frame 22 and active antenna 23 are used for parallel transmission two-way uplink/downlink signals, when transmission of downlink signal, active access main frame 22 is with wherein one road downstream signal frequency conversion, be sent to 23 active antennas by chamber subsystem 21, active antenna 23 recovers this downstream signal to launch after the frequency conversion; When the transmission upward signal, active antenna 23 is sent to active access main frame 22 with wherein going signal frequency conversion on the way by chamber subsystem 21, and active access main frame 22 recovers this upward signal to be sent to the base station after frequency conversion.

Particularly:

Active access main frame 22, it has comprised that the first transmitting-receiving port 221, the second transmitting-receiving port 222, frequency-variable module 223 and first close road/branching filter 224, wherein:

The first transmitting-receiving port 221 and the second transmitting-receiving port 222 are separate, be used for the two-way downstream signal of difference parallel receive, and be used for and send from the corresponding FDD-LTE RRU of information source end port from the two-way upward signal of this locality is parallel from information source end FDD-LTE RRU port one and port 2.

First frequency-variable module 223 is connected the second transmitting-receiving port 222 and first and closes between road/branching filter 224, it is with the downstream signal frequency conversion in second transmission line, and with the recovery of the upward signal in second transmission line frequency conversion, so that in active access main frame 22, parallel two-way uplink/downlink signals can realize physical isolation.

First 221 of the ports of transmitting-receiving directly close road/branching filter 224 and are connected with first, first closes road/branching filter 224 is used for the two-way downstream signal of parallel transmission is sent to chamber subsystem 21 through after closing road filtering, also be used for the upward signal process from chamber subsystem 21 is generated the two-way upward signal after the filtering along separate routes, be sent to first frequency-variable module 223 and the first transmitting-receiving port 221 respectively.

Active antenna 23, it has comprised that first antenna 231, second antenna 232, second frequency-variable module 233 and second close road/branching filter 234:

First antenna 231 and second antenna 232 are separate, are used for will launching respectively the two-way downstream signal of transmission, and are used for receiving respectively the two paths of signals that need carry out uplink.

Second frequency-variable module 233 is connected second antenna 232 and second and closes between road/branching filter 234, its downstream signal that will pass through in second transmission line of first frequency-variable module, 223 frequency conversions recovers frequency conversion, and with the upward signal frequency conversion in second transmission line, so that in active antenna 23, parallel two-way uplink/downlink signals can realize physical isolation.

231 on first antenna directly closes road/branching filter 234 and is connected with second, second closes road/branching filter 234 is used for the two-way upward signal of parallel transmission is sent to chamber subsystem 21 through after closing road filtering, also be used for the downstream signal process from chamber subsystem 21 is generated the two-way downstream signal after the filtering along separate routes, be sent to first antenna 231 and second frequency-variable module 233 respectively.

The concrete structure of active access main frame 22 and active antenna 23 will be elaborated in follow-up embodiment respectively, not give unnecessary details at this.

Fig. 3 shows the internal structure of the FDD-LTE indoor covering system that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.

Present embodiment has carried out refinement to the frequency-variable module in active access main frame of first embodiment of the invention and the active antenna.With reference to Fig. 3, when carrying out downstream signal when transmission, in active access main frame, in 31, having comprised:

First frequency changer circuit 311, it is made of first amplifier 3111 and first mixting circuit 3112, is used for downstream signal is carried out frequency conversion, with the physical isolation of the parallel downstream signal of two-way in the realization and first transmission line.

Simultaneously, in active antenna 32, having comprised:

Second frequency changer circuit 321, it is made of second mixting circuit 3211 and second amplifier 3212, and the downstream signal that is used for having passed through 311 frequency conversions of first frequency changer circuit recovers frequency conversion, and launches from second antenna 322.

When carrying out uplink signal transmissions, in active antenna 32, having comprised:

The 3rd frequency changer circuit 323, it is connected with second antenna 322, constitute by first low noise amplifier 3231, the 3rd mixting circuit 3232 and the 3rd amplifier 3233, be used for the upward signal that second antenna 322 receives is carried out frequency conversion, to realize the physical isolation of the upward signal that two-way walks abreast in first transmission line.

As one embodiment of the present of invention, also design has the local oscillation signal generator in active access main frame 31, it is after having produced local oscillation signal, send it in the active antenna 32, use jointly for the mixting circuit in active access main frame 31 and the active antenna 32, avoiding in active access main frame and active antenna, respectively a designing difference on the frequency that local oscillator generator brought easily in the traditional scheme, and can simplify the circuit of active antenna 32 greatly.

In active access main frame 31, having comprised:

The 4th frequency changer circuit 312, it is made of the 4th mixting circuit 3121 and the 4th amplifier 3122, be used for will pass through the upward signal of second transmission line of the 3rd frequency changer circuit 323 frequency conversions recover frequency conversion, and transfer to the second transmitting-receiving port 313 and send.

In the present embodiment, active access main frame 31 has also comprised first speed-sensitive switch 314 and second speed-sensitive switch 315 that is connected to first frequency changer circuit 311 and the 4th frequency changer circuit 312 two ends, active antenna 32 has also comprised the 3rd speed-sensitive switch 324 and the 4th speed-sensitive switch 325 that is connected to second frequency changer circuit 321 and the 3rd frequency changer circuit 322 two ends, above-mentioned four speed-sensitive switches come simultaneously the Uplink/Downlink in active access main frame 31 and the active antenna 32 to be switched all according to the control of synchronization subsystem.

The employing FDD-LTE indoor covering system that Fig. 4 shows third embodiment of the invention to be provided carries out the realization flow of downstream signal transmission, and details are as follows:

In step S401, receive first downstream signal and second downstream signal simultaneously from the information source end.

In step S402,, and be sent to the chamber subsystem after closing the road with first downstream signal with the second downstream signal frequency conversion.

In step S403, second downstream signal is recovered frequency conversion, from second antenna, launch, simultaneously first downstream signal is launched from first antenna.

The employing FDD-LTE indoor covering system that Fig. 5 shows fourth embodiment of the invention to be provided carries out the realization flow of uplink signal transmissions, and details are as follows:

In step S501, first antenna receives first upward signal, and second antenna receives second upward signal simultaneously.

In step S502,, and be sent to the chamber subsystem after closing the road with first upward signal with the second upward signal frequency conversion.

In step S503, second upward signal is recovered frequency conversion, send from the second transmitting-receiving port, simultaneously first upward signal is sent from the first transmitting-receiving port.

The embodiment of the invention is based on the FDD-LTE network, by in existing indoor covering system, increasing active access main frame, and original indoor cover antenna replaced with active antenna, thereby do under the situation of any change not needing wiring existing indoor covering system, realize the MIMO technology of FDD-LTE simply, easily, given full play to the advantage of FDD-LTE technology.

The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. FDD-LTE indoor covering system, comprise the chamber subsystem, it is characterized in that described system also comprises active access main frame and the active antenna that is connected to subsystem two ends, described chamber, described active access main frame and described active antenna are used for parallel transmission two-way uplink/downlink signals
When transmission of downlink signal, described active access main frame is sent to described active antenna with one road downstream signal frequency conversion by described chamber subsystem, and described active antenna recovers this downstream signal to launch after the frequency conversion; When transmission during upward signal, described active antenna will be gone signal frequency conversion on the way, be sent to described active access main frame by described chamber subsystem, and described active access main frame is sent to the base station after with this upward signal recovery frequency conversion.
2. the system as claimed in claim 1 is characterized in that, described active access main frame comprises:
First the transmitting-receiving port and second the transmitting-receiving port, be used for parallel receive/transmission two-way descending/upward signal;
First frequency-variable module with the described second transmitting-receiving port is connected is used for descending/upward signal frequency conversion/recovery frequency conversion;
Connect first of described first transmitting-receiving port and described first frequency-variable module simultaneously and close road/branching filter, be sent to described chamber subsystem after being used for to close the road from the downstream signal of described first transmitting-receiving port and described first frequency-variable module, and be used for the upward signal from described chamber subsystem is shunted to described first transmitting-receiving port and described first frequency-variable module.
3. the system as claimed in claim 1 is characterized in that, described active antenna comprises:
First antenna and second antenna, be used for parallel emission/reception two-way descending/upward signal;
With second frequency-variable module that described second antenna is connected, be used for uplink/downlink signals frequency conversion/recovery frequency conversion;
Connect second of described first antenna and described second frequency-variable module simultaneously and close road/branching filter, be used for to be shunted to described first antenna and described second frequency-variable module from the downstream signal of described chamber subsystem, and be sent to described chamber subsystem after being used for the upward signal from described first antenna and described second frequency-variable module closed the road.
4. system as claimed in claim 2 is characterized in that, described first frequency-variable module comprises:
First frequency changer circuit is used for the downstream signal frequency conversion;
The 4th frequency changer circuit is used for upward signal is recovered frequency conversion;
Described second frequency-variable module comprises:
Second frequency changer circuit is used for downstream signal is recovered frequency conversion;
The 3rd frequency changer circuit is used for the upward signal frequency conversion.
5. system as claimed in claim 4 is characterized in that, described first frequency-variable module also comprises:
Be connected to first speed-sensitive switch and second speed-sensitive switch at described first frequency changer circuit and described the 4th frequency changer circuit two ends, be used to control described first frequency-variable module and between described first frequency changer circuit and described the 4th frequency changer circuit, switch;
Described second frequency-variable module also comprises:
Be connected to the 3rd speed-sensitive switch and the 4th speed-sensitive switch at described second frequency changer circuit and described the 3rd frequency changer circuit two ends, be used to control described second frequency-variable module and between described second frequency changer circuit and described the 3rd frequency changer circuit, switch.
6. system as claimed in claim 4 is characterized in that, described first frequency changer circuit comprises first amplifier and first frequency mixer, and described second frequency changer circuit comprises second frequency mixer and second amplifier.
7. system as claimed in claim 4 is characterized in that, described the 3rd frequency changer circuit comprises first low noise amplifier, three-mixer and the 3rd amplifier, and described the 4th frequency changer circuit comprises the 4th frequency mixer and the 4th amplifier.
8. an employing such as each described FDD-LTE indoor covering system of claim 1 to 7 carry out the method for downstream signal transmission, it is characterized in that described method comprises the steps:
Receive first downstream signal and second downstream signal simultaneously from the information source end;
With the second downstream signal frequency conversion, and be sent to the chamber subsystem after closing the road with first downstream signal;
Second downstream signal is recovered frequency conversion, from second antenna, launch, simultaneously first downstream signal is launched from first antenna.
9. an employing such as each described FDD-LTE indoor covering system of claim 1 to 7 carry out the method for uplink signal transmissions, it is characterized in that described method comprises the steps:
First antenna receives first upward signal, and second antenna receives second upward signal simultaneously;
With the second upward signal frequency conversion, and be sent to the chamber subsystem after closing the road with first upward signal;
Second upward signal is recovered frequency conversion, send, simultaneously first upward signal is sent from the first transmitting-receiving port from the second transmitting-receiving port.
CN 201110218430 2011-08-01 2011-08-01 Frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system CN102281548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110218430 CN102281548A (en) 2011-08-01 2011-08-01 Frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN 201110218430 CN102281548A (en) 2011-08-01 2011-08-01 Frequency domain decomposition-long term evolution (FDD-LTE) indoor coverage system
PCT/CN2011/081931 WO2013016905A1 (en) 2011-08-01 2011-11-08 Fdd-lte indoor coverage system
JP2014517436A JP2014520492A (en) 2011-07-14 2012-07-13 Multi-input multi-output signal transmission method and multi-input multi-output signal transmission apparatus
PCT/CN2012/078610 WO2013007213A1 (en) 2011-07-14 2012-07-13 System, device, and method for transmitting multi-input-multi-output signals
EP12810636.6A EP2733976A4 (en) 2011-07-14 2012-07-13 System, device, and method for transmitting multi-input-multi-output signals
BR112014000207A BR112014000207A2 (en) 2011-07-14 2012-07-13 system, device and method of transmitting multiple input and multiple output signals
KR1020147001277A KR20140037227A (en) 2011-07-14 2012-07-13 System, device, and method for transmitting multi-input-multi-output signals
CN2012102614780A CN102761352A (en) 2011-08-01 2012-07-26 FDD-LTE (Frequency Division Duplexing-Long Term Evolution) indoor coverage system and signal transmission method

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CN2012102614780A CN102761352A (en) 2011-08-01 2012-07-26 FDD-LTE (Frequency Division Duplexing-Long Term Evolution) indoor coverage system and signal transmission method

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WO2013007213A1 (en) * 2011-07-14 2013-01-17 深圳市云海通讯股份有限公司 System, device, and method for transmitting multi-input-multi-output signals
CN103037384A (en) * 2012-12-07 2013-04-10 福建邮科通信技术有限公司 System of covering signals by means of single cable transmission and multiple input multiple output (MIMO) technique, and networking method of covering signals by means of single cable transmission and MIMO technique
CN103118425A (en) * 2013-02-19 2013-05-22 福建邮科通信技术有限公司 Implementation method and active micro-power distribution system supporting TD-LTE (time division-long term evolution) dual-channel transmission
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CN103118425B (en) * 2013-02-19 2016-08-03 中邮科通信技术股份有限公司 Support the implementation method of TD-LTE dual-channel transmission and active micropower compartment system
CN103118425A (en) * 2013-02-19 2013-05-22 福建邮科通信技术有限公司 Implementation method and active micro-power distribution system supporting TD-LTE (time division-long term evolution) dual-channel transmission
CN103546215A (en) * 2013-11-04 2014-01-29 中邮科通信技术股份有限公司 LTE transmission and coverage system for achieving FTTH based on digital technology
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CN104467929A (en) * 2014-10-17 2015-03-25 广州杰赛科技股份有限公司 Multiple input multiple output (MIMO) indoor distribution system
CN105553528A (en) * 2014-10-31 2016-05-04 罗森伯格技术(昆山)有限公司 Multi-network integration access system based on LTE
CN105491577A (en) * 2016-01-22 2016-04-13 北京邮电大学 Asymmetric single-double current hybrid indoor coverage system
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WO2013016905A1 (en) 2013-02-07

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