CN206332853U - Mobile communication distributed coverage system - Google Patents
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- CN206332853U CN206332853U CN201621055404.1U CN201621055404U CN206332853U CN 206332853 U CN206332853 U CN 206332853U CN 201621055404 U CN201621055404 U CN 201621055404U CN 206332853 U CN206332853 U CN 206332853U
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Abstract
The utility model discloses a kind of distributed coverage system of mobile communication, it includes information source, antenna and the transmission channel of signal is transmitted between information source and antenna, the far-end unit of the access unit for the close information source end being additionally included in transmission channel and the close antenna end in transmission channel, wherein, the access unit includes multiple the first frequency conversion subelements corresponding to each information source, and each first frequency conversion subelement includes descending frequency-variable module and upstream frequency recovery module；The far-end unit includes multiple the second frequency conversion subelements corresponding to each antenna, and each second frequency conversion subelement includes downstream frequency recovery module and up frequency-variable module.The utility model mobile communication distributed coverage system is cheap, the stability of a system is good, and the mobile communication distribution covering method realized based on the system effectively improves the coverage effect of signal.
Description
Technical field
The utility model is related to moving communicating field, more particularly to a kind of mobile communication distributed coverage system.
Background technology
Mobile communication covering is divided into two kinds of outdoor cover and in-door covering, and outdoor and small-sized building covering is basic complete by macro station
Into covering, large buildings in-door covering is completed by indoor distributed system, and in scenes such as residential quarters, there is also a large amount of in recent years
Outdoor distribution covering, indoor distribution covering system and outdoor distributed coverage system are referred to as distributed coverage system.
Existing distributed coverage system is generally divided into three major types, and the first kind can be described as traditional distributed coverage system, use
It is radio-frequency cable+passive device transmission compartment system coverage mode (as shown in Figure 1)；Equations of The Second Kind is then on the basis of the first kind
Increase frequency-variable module, MIMO signal (as shown in Figure 2) is transmitted by a radio-frequency cable, hereon referred to as radio-frequency cable frequency conversion MIMO
Distributed coverage system；3rd class is referred to as fiber distribution covering system, and it uses the side of Optical Fiber Transmission (or optical fiber+category-5 cable transmission)
Formula completes distribution covering (as shown in Figure 3).These three compartment systems have respective advantage and disadvantage.
With reference to Fig. 1, point that traditional compartment system is made up of radio-frequency cable and passive device (power splitter and coupler etc.)
Distribution system completes transmission, and advantage is technology maturation, and good stability conveniently reuses, and dilatation performance is good and easy to maintenance etc..Shortcoming one
It is to need to use more High Power Active equipment and substantial amounts of radio-frequency cable；Two be that high frequency band signal loss is big；Three are
To realize MIMO functions, it is necessary to which two thicker radio-frequency cables complete the transmission of wireless signal, not only quantities is big, construction and thing
Industry coordinates difficulty greatly, and causes cost high；Four be the development with mobile communication technology, it will occur frequency range more than 3GHz without
Line communication system, and the radio-frequency cable and passive device band support that compartment system is used at present are all 0~3GHz scopes substantially
It is interior, it is impossible to reuse.
With reference to Fig. 2, radio-frequency cable frequency conversion MIMO distributed coverage systems can be completed by single radio-frequency cable multisystem and
MIMO signal is transmitted, it is to avoid traditional distributed coverage system needs two pieces radio-frequency cables to complete the shortcoming of MIMO transmission, but does not have
Part system during multisystem is avoided to use the problem of high frequency band signal loss is big, not solving existing compartment system can not yet
Support the shortcoming more than 3GHz wireless communication systems using frequency range.
With reference to Fig. 3, information source base station radio-frequency signal is converted into digital optical signal first in fiber distribution covering system, passed through
Optical Fiber Transmission is transferred to far-end unit to expanding element, then by optical fiber or category-5 cable, and the advantage of the system is that equipment is compact, is applied
Work is relatively simple, and preferably, deficiency is that cost is high to coverage effect, and active equipment is more, and level is more, and optical fiber and category-5 cable stability are poor；
It can not reuse simultaneously, dilatation poor performance and maintenance difficulties are larger.
With developing rapidly for mobile communication, required to meet ever-increasing user, to complete various complex scenes
Covering requirement, it is necessary to propose a kind of innovation distribution covering solution.
Utility model content
The purpose of this utility model is to propose a kind of mobile communication distributed coverage system, with reference to radio-frequency cable and passive device
The advantage of signal transmission, both easy construction, cost were relatively low, had the advantages that stability is high again and were easy to safeguard.
To reach above technical purpose, the technical solution adopted in the utility model is as follows：
A kind of mobile communication distributed coverage system, it includes information source, antenna and signal is transmitted between information source and antenna
Transmission channel, also including the access unit of close information source end that is arranged in transmission channel and is arranged on close in transmission channel
The far-end unit of antenna end；
The access unit includes the first frequency conversion subelement corresponding to each information source, and each first frequency conversion subelement includes
First up-downgoing shunt, descending frequency-variable module and upstream frequency recovery module, the descending frequency-variable module and upstream frequency are also
Grand master pattern block is connected with the first up-downgoing shunt respectively, and is connected by the first up-downgoing shunt with corresponding information source；
The far-end unit includes the second frequency conversion subelement corresponding to each antenna, and each second frequency conversion subelement includes
Second up-downgoing shunt, downstream frequency recovery module and up frequency-variable module, the downstream frequency recovery module and up change
Frequency module is connected with the second up-downgoing shunt respectively, and is connected by the second up-downgoing shunt with corresponding antenna；
The access unit is connected by transmission channel with far-end unit.
Preferably, the access unit also includes the first multiplefrequency mixer, and the first multiplefrequency mixer one end connection is more
The descending frequency-variable module and upstream frequency recovery module of the individual first frequency conversion subelement, the other end pass through transmission channel and distal end
Unit is connected.
Further, the far-end unit also includes the second multiplefrequency mixer, and the second multiplefrequency mixer connection is multiple
The downstream frequency recovery module and up frequency-variable module of the second frequency conversion subelement, and it is single with access by the transmission channel
Member connection.
Further, the far-end unit also includes the 3rd multiplefrequency mixer, and the 3rd multiplefrequency mixer connection is multiple
Second up-downgoing shunt of the second frequency conversion subelement, and connected by the transmission channel with corresponding antenna.
Preferably, the access unit also includes the first amplification module, and first amplification module is connected to described first
Between up-downgoing shunt and corresponding upstream frequency recovery module, for entering to the upward signal after overfrequency reduction treatment
Row amplification.
Further, the far-end unit also includes the second amplification module, and second amplification module is connected to described the
Between two up-downgoing shunts and corresponding downstream frequency recovery module, for the downstream signal after overfrequency reduction treatment
It is amplified.
Preferably, the access unit includes the first synchronization module, and the far-end unit includes the second synchronization module, described
First synchronization module and the second synchronization module are connected in each first frequency conversion subelement and far-end unit in access unit respectively
Each second frequency conversion subelement, realizes that the clock of access unit and far-end unit is synchronous.
Specifically, the signal includes one kind or many in GSM, CDMA, WCDMA, TD-SCDMA, LTE and lte-a system
Kind.
Compared with prior art, the utility model has following advantage：
First, the utility model can solve the problem of existing compartment system can not support high band.Covering system is distributed at present
The interval frequency range that system radio-frequency cable used and passive device are supported all is 0~3GHz substantially, and future will occur higher than 3GHz
GSM, will be unable to reuse during applied to the distributed coverage system built up.And the utility model is by using upper
Descending frequency-variable module frequency conversion, signal is changed into the method for the relatively low frequency transmission of frequency range, can solve this problem.
Secondly, the utility model can reduce engineering construction difficulty, reduction property coordination difficulty.As current mobile communication makes
Frequency range more and more higher is used, frequency conversion can be changed into the relatively low frequency of frequency range when transmitting, it is possible in identical coverage from straight
The less radio-frequency cable in footpath, or from the bigger scope of cross-sectional area identical radio-frequency cable covering.Avoid radio-frequency cable+nothing
Use compared with thick cable, difficulty of construction is big and uses more active equipment, and cause in the device transmission compartment system coverage mode of source
The problem of property difficult coordination, turn avoid same route in Optical Fiber Transmission distribution coverage mode needs multifiber or category-5 cable
Transmission is completed, is easily gone wrong and the problem of difficulty is safeguarded.
Meanwhile, the utility model can also reduce cost.With the passive transmission compartment system of radio-frequency cable+passive device composition
Compare, frequency conversion transmission distributed coverage system can use cheap many small size cables, and can greatly increase information source
The coverage of base station, reduces base station number, cost is reduced accordingly；Compared with Optical Fiber Transmission distributed coverage system, frequency conversion
Transmit distributed coverage system number of devices few, digital technology is not used, without price higher digit chip and high-speed optical transmission
Module, cost can be greatly lowered.
Finally, the utility model is amplified processing to signal by installing amplification module, and coverage effect is relatively preferable.
Brief description of the drawings
Fig. 1 is the mobile communication that transmission channel is made up of radio-frequency cable and passive device without frequency-conversion processing in the prior art
Distributed coverage system structural representation.
Fig. 2 is the mobile communication that transmission channel is made up of radio-frequency cable and passive device for having frequency-conversion processing in the prior art
Distributed coverage system structural representation.
Fig. 3 is mobile communication distributed coverage system structural representation in the prior art using optical fiber as transmission channel.
Fig. 4 is the utility model mobile communication distributed coverage system structural representation.
Fig. 5 is the structural representation of the access unit of the utility model mobile communication distributed coverage system first embodiment.
Fig. 6 is the structural representation of the far-end unit of the utility model mobile communication distributed coverage system first embodiment.
Fig. 7 is the structural representation of the access unit of the utility model mobile communication distributed coverage system second embodiment.
Fig. 8 is the structural representation of the far-end unit of the utility model mobile communication distributed coverage system second embodiment.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Mobile communication distributed coverage system of the present utility model with reference to shown in Fig. 4, it includes information source, antenna 5, in information source
The transmission channel 3 of signal is transmitted between antenna 5, and is arranged on the access unit 2 in the transmission channel 3 close to information source end
With the far-end unit 4 being arranged in the transmission channel 3 close to antenna end.The signal of the information source end is by each heterogeneous networks system
The base station 1 of formula is sent and reception processing.The distributed coverage system realizes the indoor and outdoor distribution covering of mobile communication signal.
Network formats are exactly the type of network, and the conventional network formats of China's mobile phone have the CDMA 1X that CDMA mobile phones take,
800MHZ frequency ranges；The 900/1800/1900MHZ frequency ranges that GSM mobile handset takes；The 900/ of GSM 1X bimodulus (i.e. WCDMA) occupancy
1800MHZ frequency ranges；The 900/1800/1900/2100MHz frequency ranges that 3G takes, the 1920--2170MHZ frequency ranges that 4G takes.UNICOM
The 2555-2575MHz that the current TD LTE of 4G take, 2300-2320MHz frequency ranges (only limit interior to use).Each base station 1 has it
The operator of ownership, different operator takes different frequency ranges, therefore produces the various network formats for covering different frequency range
Base station 1, the base station 1 of different network formats needs to access same mobile communication distributed coverage system jointly.Current network system
The frequency range of formula is all covered in the range of 0~3GHz, but as frequency resource is fewer and feweri, will more than 3GHz GSMs
Trend can be turned into, and can be realized in a short time civilian.
In order that signal of the multichannel from different systems base station can be penetrated by the way that negligible amounts or flux are less
Frequency cable is transmitted, it is necessary to carry out frequency conversion before the multiple signals enter radio-frequency cable, the multiple signals pass through radio frequency
Also need to reduce into line frequency after cable.
With reference to Fig. 5, the access unit 2 includes multiple the first frequency conversion subelements 21 corresponding to each standard base station, with
And first multiplefrequency mixer 22.The first frequency conversion subelement 21 includes two subports (not shown) and is connected to
Descending frequency-variable module 212 and upstream frequency recovery module 213 between the two subports.Further, one of them sub- end
Mouth passes through the first up-downgoing shunt 211 and the corresponding standard base station is connected；Another subport passes through more than described first
Frequency combiner 22 is connected with the transmission channel 3.To improve covering effect of signals, the access unit 2 also includes the first amplification
Module, first amplification module is connected to the first up-downgoing shunt 211 and corresponding upstream frequency recovery module 213
Between, for being amplified (not shown) to the upward signal after overfrequency reduction treatment.
With reference to Fig. 6, the far-end unit 4 includes multiple the second frequency conversion subelements 42 for corresponding to each antenna 5, with
And second multiplefrequency mixer 41 and the 3rd multiplefrequency mixer 43.The second frequency conversion subelement 42 includes two sub- ends
Mouth (not shown) and the downstream frequency recovery module 421 and up frequency-variable module 422 being connected between the two subports.
Further, one of subport is connected by second multiplefrequency mixer 41 with the transmission channel 3；Another height end
Mouth is connected by the second up-downgoing shunt 423 with the 3rd multiplefrequency mixer 43, the 3rd multiplefrequency mixer 43 and institute
Antenna 5 is stated to connect.However, those skilled in the art are it is to be understood that the component of the 3rd multiplefrequency mixer 43 not necessarily,
According to actual needs, each second up-downgoing shunt 423 can be connected with corresponding antenna 5.To improve signal
Coverage effect, the far-end unit 4 also includes the second amplification module, and second amplification module is connected to second up-downgoing
Between shunt 423 and corresponding downstream frequency recovery module 421, for entering to the downstream signal after overfrequency reduction treatment
Row amplification (not shown).
With continued reference to Fig. 4 to Fig. 6, the transmission channel 3 be used for for mobile communication signal electromagnetic wave provide stably and
Transmission medium with function of shielding.The transmission channel 3 includes connecting the first passage of the base station 1 and the access unit 2
31st, the second channel 32 of the access unit 2 and far-end unit 4 is connected, and connects the far-end unit 4 and the antenna 5
Third channel 33.Specifically, the first passage 31 be connected to each base station 1 signal port (not shown) and with this
Between the subport of the first corresponding frequency conversion subelement 21 of port；In the present embodiment, the first passage 31 is by the He of transmission line 311
Coupler 312 is constituted, and the transmission line 311 can be its of radio-frequency cable, optical fiber, coaxial cable or other known transmission lines
One of, the coupler 312 is one of representative known passive device.Further, the second channel 32
It is connected between the first multiplefrequency mixer 22 of the access unit 2 and the second multiplefrequency mixer 41 of the far-end unit 4；Institute
Second channel 32 is stated to be made up of transmission line 321 and passive device 322.In transmission compartment system, the access unit 2 is close to base
Stand end, the far-end unit 4 is therefore, generally distant between the access unit 2 and far-end unit 4 close to antenna end, because
This is from stability and the security consideration of the convenience and signal transmission of cable wiring manufacture, the transmission line of the second channel 32
321 generally use radio-frequency cable, are preferably used as the transmission line using the radio-frequency cable of wall scroll radio-frequency cable or negligible amounts
321；The passive device 322 can be realized using passive device known to power splitter and/coupler etc..Further, institute
State the 3rd multiplefrequency mixer 43 (or each second frequency conversion subelement 42 that third channel 33 is connected to the far-end unit 4
Port) between corresponding antenna 5, in the present embodiment, the third channel 33 is by transmission line (radio-frequency cable, optical fiber, coaxial electrical
Cable or other known transmission lines) connection, but those skilled in the art are it is to be understood that setting up for the third channel 33 can be with
Realized by other known modes.
With reference to Fig. 7 and Fig. 8, if the base station 1 is using time division duplex (Time Division Duplexing, TDD) system
Formula, in the GSM of tdd mode, receives and is transmitted in the different time-gap of same frequency channel (i.e. carrier wave), with guarantor
The card time separates reception and transmission channel, thus, for the synchronism for the signal for ensureing base station end and antenna end, the access list
Member 2 needs to set the first synchronization module 23, simultaneously, and the far-end unit 4 needs to set the second synchronization module 44, described first
The synchronization module 24 of synchronization module 23 and second is connected in each first frequency conversion subelement and far-end unit in access unit respectively
Each second frequency conversion subelement, realizes that the clock of access unit and far-end unit is synchronous.
With continued reference to Fig. 4~Fig. 6, the utility model is further described by specific implementation method.Based on this reality
With new mobile communication distributed coverage system, distribution covering method bag of the utility model for the multiple signals of different systems
Include the method for the distribution covering to many downstream signals and the method covered is distributed to multichannel upward signal.Individually below to this two
Individual transfer control method is illustrated.
The downstream signal, which refers generally to send from base station end, to be transmitted to the signal of the reception antenna of distal end, when a base station pair
When answering multiple reception antennas, the downstream signal of multichannel is formed.The distribution covering method of multichannel downstream signal comprises the following steps：
The signal sent by multiple standard base stations 1 is transmitted to the access unit 2 by the first passage 31
The Signal separator is gone out descending letter by the first frequency conversion subelement 21, the up-downgoing shunt 211 of the first frequency conversion subelement 21
Number, the downstream signal that descending 212 pairs of the frequency-variable module is isolated carries out frequency-conversion processing, specifically by the frequency of the downstream signal
Rate is adjusted to the frequency variation signal in 0~3GHz frequency ranges；
Downstream signal described in multichannel after frequency conversion is combined by first multiplefrequency mixer 22 is processed as combining
Signal, the combining signal is transmitted to the second multiplefrequency mixer 41 of the far-end unit 4 by a second channel 32；
Second multiplefrequency mixer 41 isolates the downstream signal of each in the combining signal after frequency conversion
Come；
Described 421 pairs of downstream signals after frequency conversion of downstream frequency recovery module enter line frequency reduction, Ran Houjing
Cross after the enhanced processing of amplifier (not shown) and continued traveling downwardly by the 3rd multiplefrequency mixer 43 to corresponding antenna 5, with complete
Into descending covering；Or, the signal after enhanced processing is directly continued traveling downwardly to corresponding antenna 5 by the third channel 33,
To complete descending covering.
The upward signal, which refers generally to receive from reception antenna, to be transmitted to the signal of base station end, when multiple reception antennas correspondence
During one or more base stations, the upward signal of multichannel is formed.The distribution covering method of multichannel upward signal comprises the following steps：
Multichannel upward signal is received by different antennas 5, and the upward signal is directly passed by the third channel 33
Transport to the second frequency conversion subelement 42 of corresponding far-end unit 4；Or by the 3rd multiplefrequency mixer 43 distribute after transmit to
Each second frequency conversion subelement 42.
The upward signal to each second frequency conversion subelement 42 is transmitted first by the second up-downgoing shunt 423
Upward signal is isolated, then frequency-conversion processing is carried out by the up frequency-variable module 422, specifically by the frequency of the upward signal
It is adjusted to the frequency variation signal in 0~3GHz frequency ranges；
The upward signal combining after frequency conversion is combining signal by second multiplefrequency mixer 41, then should
Combining signal is transmitted to the first multiplefrequency mixer 22 of the access unit 2 by a second channel 32；
The combining signal is separated again into multichannel upward signal by first multiplefrequency mixer 22, then, and described
The upward signal of 213 pairs of the upstream frequency recovery module process frequency conversion of one frequency conversion subelement 21 enters line frequency reduction, then
The corresponding standard base station 1 is gone upward to by the first passage 31 after the enhanced processing of amplifier (not shown),
To complete up covering.
With reference to Fig. 7 and Fig. 8, further, when the standard signal (system of access for accessing the mobile communication distributed coverage system
Formula base station 1) it is more when, it is necessary to which taking more frequency carries out frequency conversion transmission when especially accessing multiple mimo systems, use
Frequency variation signal frequency range is excessive, can cause to use high-frequency frequency range, so that cause efficiency of transmission to decline, can be by multichannel standard signal
It is divided into two-way to be transmitted by two second channels 32 respectively, two-way can use frequency conversion of the identical compared with low-frequency range to believe
Number it is transmitted, so as to lift efficiency of transmission, reaches the purpose for avoiding interference and long-distance transmissions.And in the output end of signal
(distal end), can use multiple antennas or dual polarized antenna to complete MIMO coverings.
Further, when the standard base station 1 is the base station of TDD standards, the access unit 2 and far-end unit 4
Receiving and transmitting signal also needs to the synchronization process by the synchronization module 44 of the first synchronization module 23 and second (such as Fig. 7 and Fig. 8 institutes
Show).
In summary, the utility model mobile communication distributed coverage system is cheap, the stability of a system is good, and is based on
The mobile communication distribution covering method that the system is realized effectively improves the coverage effect of signal.
Above-described embodiment is the utility model preferably embodiment, but is not merely restricted to the described embodiments, its
He any without departing from Spirit Essence of the present utility model and the change made under principle, modification, replacement, combine, simplify, all should
For equivalent substitute mode, it is all contained within protection domain of the present utility model.
Claims (8)
1. a kind of mobile communication distributed coverage system, it includes information source, antenna and the biography of signal is transmitted between information source and antenna
Defeated passage, it is characterised in that：The access unit of the also close information source end including being arranged in transmission channel leads to transmission is arranged on
The far-end unit of close antenna end on road；
The access unit includes the first frequency conversion subelement corresponding to each information source, and each first frequency conversion subelement includes first
Up-downgoing shunt, descending frequency-variable module and upstream frequency recovery module, the descending frequency-variable module and upstream frequency also grand master pattern
Block is connected with the first up-downgoing shunt respectively, and is connected by the first up-downgoing shunt with corresponding information source；
The far-end unit includes the second frequency conversion subelement corresponding to each antenna, and each second frequency conversion subelement includes second
Up-downgoing shunt, downstream frequency recovery module and up frequency-variable module, the downstream frequency recovery module and up frequency conversion mould
Block is connected with the second up-downgoing shunt respectively, and is connected by the second up-downgoing shunt with corresponding antenna；
The access unit is connected by transmission channel with far-end unit.
2. mobile communication distributed coverage system as claimed in claim 1, it is characterised in that：The access unit also includes first
Multiplefrequency mixer, described first multiplefrequency mixer one end connects the descending frequency-variable modules of multiple first frequency conversion subelements and upper
Line frequency recovery module, the other end is connected by transmission channel with far-end unit.
3. mobile communication distributed coverage system as claimed in claim 1, it is characterised in that：The far-end unit also includes second
Multiplefrequency mixer, second multiplefrequency mixer connects the downstream frequency recovery modules of multiple second frequency conversion subelements and upper
Row frequency-variable module, and be connected by the transmission channel with access unit.
4. mobile communication distributed coverage system as claimed in claim 1, it is characterised in that：The far-end unit also includes the 3rd
Multiplefrequency mixer, the 3rd multiplefrequency mixer connects the second up-downgoing shunt of multiple second frequency conversion subelements, and
Connected by the transmission channel with corresponding antenna.
5. the mobile communication distributed coverage system as described in Claims 1-4 is any, it is characterised in that：The access unit is also
Including the first amplification module, first amplification module is connected to the first up-downgoing shunt and corresponding upstream frequency also
Between grand master pattern block, for being amplified to the upward signal after overfrequency reduction treatment.
6. the mobile communication distributed coverage system as described in Claims 1-4 is any, it is characterised in that：The far-end unit is also
Including the second amplification module, second amplification module is connected to the second up-downgoing shunt and corresponding downstream frequency also
Between grand master pattern block, for being amplified to the downstream signal after overfrequency reduction treatment.
7. the mobile communication distributed coverage system as described in Claims 1-4 is any, it is characterised in that：The access unit is also
Including the first synchronization module, the far-end unit also includes the second synchronization module, first synchronization module and the second synchronous mould
Block connects each second frequency conversion subelement in each first frequency conversion subelement and far-end unit in access unit respectively, realizes access
The clock of unit and far-end unit is synchronous.
8. the mobile communication distributed coverage system as described in Claims 1-4 is any, it is characterised in that：
The signal includes the one or more in GSM, CDMA, WCDMA, TD-SCDMA, LTE and lte-a system.
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| CN201621055404.1U CN206332853U (en) | 2016-09-14 | 2016-09-14 | Mobile communication distributed coverage system |
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| CN201621055404.1U CN206332853U (en) | 2016-09-14 | 2016-09-14 | Mobile communication distributed coverage system |
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| CN109391284A (en) * | 2017-08-10 | 2019-02-26 | 中兴通讯股份有限公司 | A kind of conversion of signal, signal Coupling device and wireless network cover system |
| CN110278011A (en) * | 2019-06-12 | 2019-09-24 | 京信通信系统（中国）有限公司 | Distributing antenna system, method and apparatus |
| CN110868721A (en) * | 2019-10-15 | 2020-03-06 | 内江喜马雅拉网络技术有限公司 | Indoor signal balanced distribution system and method |
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| CN110278011A (en) * | 2019-06-12 | 2019-09-24 | 京信通信系统（中国）有限公司 | Distributing antenna system, method and apparatus |
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| CN110278011B (en) * | 2019-06-12 | 2021-04-27 | 京信通信系统（中国）有限公司 | Distributed antenna system, method and apparatus |
| EP3986011A4 (en) * | 2019-06-12 | 2022-08-17 | Comba Network Systems Company Limited | DISTRIBUTED ANTENNA SYSTEM, METHOD AND APPARATUS |
| CN110868721A (en) * | 2019-10-15 | 2020-03-06 | 内江喜马雅拉网络技术有限公司 | Indoor signal balanced distribution system and method |
| CN110868721B (en) * | 2019-10-15 | 2021-10-12 | 内江喜马雅拉网络技术有限公司 | Indoor signal balanced distribution system and method |
| WO2021212690A1 (en) * | 2020-04-22 | 2021-10-28 | 广州市瀚云信息技术有限公司 | Public safety wireless network coverage enhanced distributed system |
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