CN114286355A - Active remote unit and indoor coverage system based on same - Google Patents
Active remote unit and indoor coverage system based on sameDownload PDFInfo
- Publication number
- CN114286355A CN114286355ACN202111667889.5ACN202111667889ACN114286355ACN 114286355 ACN114286355 ACN 114286355ACN 202111667889 ACN202111667889 ACN 202111667889ACN 114286355 ACN114286355 ACN 114286355A
- Authority
- CN
- China
- Prior art keywords
- port
- switch
- link
- duplexer
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891communicationMethods0.000claimsabstractdescription38
- 238000001514detection methodMethods0.000claimsdescription27
- 238000001914filtrationMethods0.000description21
- 239000004020conductorSubstances0.000description14
- 230000003321amplificationEffects0.000description9
- 238000003199nucleic acid amplification methodMethods0.000description9
- 210000001503jointAnatomy0.000description8
- 230000005540biological transmissionEffects0.000description6
- 230000015572biosynthetic processEffects0.000description6
- 238000003786synthesis reactionMethods0.000description6
- 238000010276constructionMethods0.000description5
- 238000010586diagramMethods0.000description3
- 230000006855networkingEffects0.000description3
- 238000000926separation methodMethods0.000description3
- 230000008878couplingEffects0.000description2
- 238000010168coupling processMethods0.000description2
- 238000005859coupling reactionMethods0.000description2
- 230000005855radiationEffects0.000description2
- 238000011144upstream manufacturingMethods0.000description2
- 101000854827Homo sapiens VertninProteins0.000description1
- 102100020798VertninHuman genes0.000description1
- 230000007547defectEffects0.000description1
- 238000005516engineering processMethods0.000description1
- 238000012544monitoring processMethods0.000description1
- 230000035515penetrationEffects0.000description1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Transceivers (AREA)
Abstract
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to an active remote unit and an indoor coverage system based on the active remote unit.
Background
4G changes life, and 5G changes society. With the continuous advance of 5G construction, 5G technology has penetrated all aspects of society, and profoundly influences the life and working modes of people. The industry expects that 80% of the traffic will occur in indoor scenarios, so the operator's core competitiveness in indoor coverage.
Due to the shielding of buildings, the complexity of urban environment and large transmission and penetration loss of the 5G frequency band in the air, weak coverage and blind coverage areas exist in rooms, such as hotels, office buildings, underground parking lots, elevator shafts, business halls, supermarket stores, KTVs, coffee houses and the like
The main scheme for solving the problems of indoor weak coverage and blind coverage is to adopt a small base station, but the problems of back transmission of resources, high construction difficulty, inflexible networking, higher equipment and construction cost and poor investment income ratio exist in the construction of the small base station.
Disclosure of Invention
The invention aims to overcome the defects and provide an active remote unit and an indoor coverage system based on the active remote unit, so that the problems of indoor weak coverage and blind coverage are solved.
In order to achieve the above object, an active remote unit includes a first MIMO channel, a second MIMO channel and a control module;
the first MIMO channel comprises a first MIMO signal link and an OOK signal link, the first MIMO signal link and the OOK signal link are both connected with a first duplexer, the first duplexer is connected with a first radio frequency connector, the first radio frequency connector is connected with an information source, the first MIMO signal link and the OOK signal link are both connected with a second duplexer, and the second duplexer is connected with a second radio frequency connector;
the second MIMO channel comprises a second MIMO signal link and a Bluetooth communication link, the second MIMO signal link and the Bluetooth communication link are both connected with a third duplexer, the third duplexer is connected with a third radio frequency connector, the third radio frequency connector is connected with an information source, the second MIMO signal link and the Bluetooth communication link are both connected with a fourth duplexer, and the fourth duplexer is connected with a fourth radio frequency connector;
the OOK signal link and the Bluetooth communication link are both connected with a control module, and the control module is used for sending signals of the information source to an OOK transmitting module for OOK modulation.
The first MIMO signal link comprises a first radio frequency connector, the first radio frequency connector is connected with a first radio frequency feed cable, the first radio frequency feed cable is connected with a first port of a first duplexer, a second port of the first duplexer is connected with a first port of a first two-power divider, a second port and a third port of the first two-power divider are respectively connected with a first user access link and a first line loss compensation link, the first user access link is connected with a first MIMO antenna, the first line loss compensation link is connected with a second port of a second duplexer, the first port of the second duplexer is connected with a first port of a fifth switch, the second port of the fifth switch is connected with a second radio frequency feed cable, the third port of the fifth switch is grounded, and the second radio frequency feed cable is connected with a second radio frequency connector;
the first radio frequency feed cable is connected with the first power taking module, and the second radio frequency feed cable is connected with the first feed module and the current detection module.
The first user access link comprises a first switch, a first port of the first switch is connected with a second port of the first binary power, a second port of the first switch is connected with a first downlink user access link, a third port of the first switch is connected with a first uplink user access link, the first downlink user access link is connected with a second port of the second switch, the first uplink user access link is connected with a third port of the second switch, a first port of the second switch is connected with a first band-pass filter, and the first band-pass filter is connected with the first MIMO antenna.
The first line loss compensation link comprises a third switch, a first port of the third switch is connected with a third port of the first binary power divider, a second port of the third switch is connected with a first downlink line loss compensation link, a third port of the third switch is connected with a first line uplink loss compensation link, the first downlink line loss compensation link is connected with a second port of the fourth switch, the first uplink line loss compensation link is connected with a third port of the fourth switch, and a first port of the fourth switch is connected with a second port of the second duplexer.
The OOK signal link includes an OOK receiving module, the OOK receiving module is connected to a third port of the second power divider, a second port of the second power divider is connected to a third port of the second duplexer, a first port of the second power divider is connected to a third port of the first duplexer, and the OOK receiving module is connected to the control module.
The second MIMO signal link comprises a third radio frequency connector, the third radio frequency connector is connected with a third radio frequency feeder cable, the third radio frequency feeder cable is connected with a first port of a third duplexer, a third port of the third duplexer is connected with a first port of a fourth second power divider, a third port and a second port of the fourth power divider are respectively connected with a second user access link and a second line loss compensation link, the second user access link is connected, the second line loss compensation link is connected with a third port of a fourth duplexer, the first port of the fourth duplexer is connected with a first port of a tenth switch, the second port of the tenth switch is connected with a fourth radio frequency feeder cable, the third port of the tenth switch is grounded, and the fourth radio frequency feeder cable is connected with a fourth radio frequency connector;
the third radio frequency feed cable is connected with the second power taking module, and the fourth radio frequency feed cable is connected with the second feed module.
The second user access link comprises an eighth switch, a first port of the eighth switch is connected with a third port of the fourth second power divider, a second port of the eighth switch is connected with a second downlink user access link, a third port of the eighth switch is connected with a second uplink user access link, the second downlink user access link is connected with a second port of the ninth switch, the second uplink user access link is connected with a second port of the ninth switch, a first port of the ninth switch is connected with a second band-pass filter, and the second band-pass filter is connected with the second MIMO antenna.
The second line loss compensation link comprises a sixth switch, a first port of the sixth switch is connected with a second port of the fourth second power divider, a second port of the sixth switch is connected with a second downlink line loss compensation link, a third port of the sixth switch is connected with a second uplink line loss compensation link, the second downlink line loss compensation link is connected with a second port of the seventh switch, the second uplink line loss compensation link is connected with a third port of the seventh switch, a first port of the seventh switch is connected with a third port of the fourth duplexer, a first port of the fourth duplexer is connected with a first port of the tenth switch, a second port of the tenth switch is connected with a fourth radio frequency feed cable, a third port of the tenth switch is grounded, and the fourth radio frequency feed cable is connected with a fourth radio frequency connector.
The Bluetooth communication link comprises a Bluetooth communication module, the Bluetooth communication module is connected with a second port of the third power divider, a third port of the third power divider is connected with a second port of the fourth duplexer, a first port of the third power divider is connected with a second port of the third duplexer, and the Bluetooth communication module is connected with the control module.
An indoor coverage system based on active remote units comprises a feed access unit and a plurality of active remote units, wherein the feed access unit is connected with a signal source and a power supply unit, an output connector of the feed access unit is connected with the active remote units in series, and all signals are grounded in a final active remote unit.
Compared with the prior art, in the active remote unit, the received 2 x 2MIMO signal can be remote through the first MIMO channel, the second MIMO channel and the control module, so that signal coverage is completed, the control module can send the uplink and downlink switching signals of the information source to the OOK transmitting module for OOK modulation, the active remote unit is monitored and managed through Bluetooth communication, and the problems of indoor weak coverage and blind coverage at present are solved.
In the indoor coverage system, the feed access unit is connected with the information source, the feed access unit is connected with the power supply unit, the output connector of the feed access unit is connected with the active remote units in series, and all signals are grounded in the final active remote unit. The flexibility of networking is improved, the construction difficulty is reduced, and the investment benefit ratio of networking is improved. All signals in the final active remote unit are grounded, and signal leakage can be prevented.
Drawings
Fig. 1 is a system diagram of an active remote unit according to the present invention;
FIG. 2 is a system diagram of an indoor covering system according to the present invention;
fig. 3 is a system diagram of a feeding access unit in the embodiment.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an active remote unit is responsible for a feeding access unit, and can provide 2 × 2MIMO signal coverage by means of an external antenna, and simultaneously provide a cascade of one active remote unit, and can also provide-48V power supply for the cascaded active remote unit by means of a radio frequency feed cable feeding.
An active remote unit includes a MIMO1 channel, a second MIMO channel, and a control module.
The MIMO1 channel comprises a MIMO1 signal link, an OOK signal link, a 48V RTN power taking circuit, a 48V RTN feed circuit and a current detection circuit, and mainly realizes the following functions:
1) user access link: amplifying and filtering the uplink and downlink signals of the first MIMO, namely amplifying and filtering the accessed first MIMO signals in the downlink direction and then providing signal coverage through antenna radiation; and in the uplink direction, the accessed terminal signal is amplified, filtered and sent to the feed access unit.
2) Line loss compensation link: and compensating the feed cable loss of the first MIMO signal between the feed access unit and the active remote unit so that the active remote unit can be cascaded with the next-stage active remote unit, and the line loss compensation is simultaneously compensated in downlink and uplink.
3) And receiving the OOK signal from the feed cable, and demodulating the OOK signal to be used as a control signal for switching the switch of the OOK signal from the feed cable to the uplink and the downlink.
4) And separating the OOK signal in the feed cable into an OOK signal, and feeding the OOK signal into the radio frequency feed cable so as to provide the OOK signal for the next-stage active remote unit.
5) Taking out-48V RTN: and taking out the-48V RTN from the accessed radio frequency feeder cable.
6) feed-48V RTN: the-48V RTN is fed into the rf feed cable to power the next stage of active remote unit.
7) The current detection module respectively carries out current detection to two ways of radio frequency feeder cables, when detecting that no current exists, through switching to the ground connection mode with the switch to prevent that first MIMO signal and OOK signal from outwards revealing.
The connection relationship of each device and module of the first MIMO signal link is as follows:
the first MIMO signal link of the first MIMO channel includes a first radio frequency connector, the first radio frequency connector is connected to a first radio frequency feed cable, the first radio frequency feed cable is connected to a first port of the first duplexer, a second port of the first duplexer is connected to a first port of a first power divider, and the first power divider and the second power divider are respectively connected to the user access link and the line loss compensation link, which are described below.
When the first and second power dividers are connected with the user access link, the second port of the first power divider is connected with the first port of the first switch, the second port of the first switch is connected with the first downlink user access link, the third port of the first switch is connected with the first uplink user access link, the first downlink user access link is connected with the second port of the second switch, the first uplink user access link is connected with the third port of the second switch, the first port of the second switch is connected with the first band-pass filter, and the first band-pass filter is connected with the first MIMO antenna.
When the first and second power dividers are connected with the line loss compensation link, a third port of the first and second power dividers is connected with a first port of a third switch, a second port of the third switch is connected with a first downlink line loss compensation link, a third port of the third switch is connected with a first uplink line loss compensation link, the first downlink line loss compensation link is connected with a second port of a fourth switch, the first uplink line loss compensation link is connected with a third port of the fourth switch, a first port of the fourth switch is connected with a second port of a second duplexer, a first port of the second duplexer is connected with a first port of a fifth switch, a second port of the fifth switch is connected with a second radio frequency feeder cable, a third port of the fifth switch is grounded, and the second radio frequency feeder cable is connected with a second radio frequency connector.
The functions of the various devices and modules of the first MIMO signal link are described as follows:
the first radio frequency connector is in butt joint with the feed access unit through a radio frequency feed cable.
The first duplexer realizes the splitting or combining of the first MIMO signal and the OOK signal.
The first two power dividers realize the power distribution or synthesis of the first MIMO signal, namely, the power of the first MIMO signal is equally distributed to a user access link and a line loss compensation link in the downlink direction; and in the uplink direction, the first MIMO signal of the user access link and the first MIMO signal of the line loss compensation link are subjected to power synthesis.
The first switch realizes the switching of uplink and downlink signals of a user access link.
The first downlink user access link realizes the amplification and filtering processing of the downlink first MMO signal of the link.
And the first uplink user access link realizes the amplification and filtering processing of the uplink first MIMO signal.
The second switch realizes the switching of uplink and downlink signals of a user access link.
The first band-pass filter realizes channel filtering and out-of-band rejection of the path of the first MIMO signal.
And the third switch realizes the switching of the uplink and downlink signals of the line loss compensation link.
The first downlink line loss compensation link realizes the amplification and filtering processing of the downlink first MIMO signal of the line.
The first uplink line loss compensation link realizes the amplification and filtering processing of the uplink first MIMO signal.
And the fourth switch realizes the switching of the uplink and downlink signals of the line loss compensation link.
The second duplexer realizes the separation or combination of the first MIMO signal and the OOK signal.
The fifth switch realizes the output or closing function of the first MIMO signal and the OOK signal after being combined by the duplexer, and is matched with current detection for use, namely when the current detection module detects that current exists in the radio frequency feed cable, the switch is switched to a signal output path; when the current detection module detects that no current exists in the radio frequency feed cable, the switch is switched to a grounding state so as to prevent the first MIMO from leaking outwards.
The connection relationship between the devices and modules of the OOK signal link is described as follows:
the OOK signal link of the first MIMO channel includes a first radio frequency connector, the first radio frequency connector is connected to a first radio frequency feed cable, the first radio frequency feed cable is connected to a third port of the first duplexer, a port of the first duplexer is connected to a first port of a second power divider, a second port of the second power divider is connected to a third port of a second duplexer, a first port of the second duplexer is connected to a first port of a fifth switch, a second port of the fifth switch is connected to a second radio frequency feed cable, a third port of the fifth switch is grounded, the second radio frequency feed cable is connected to a second radio frequency connector, a third port of the second power divider is connected to an OOK receiving module, and the OOK receiving module is connected to the control module.
The functions of the various devices and modules of the OOK signal link are described as follows:
the first radio frequency connector is in butt joint with the feed access unit or the upper-stage active remote unit through a radio frequency feed cable.
The first duplexer realizes the splitting or combining of the first MIMO signal and the OOK signal.
The second power divider is used for realizing OOK signal power distribution or synthesis, namely the OOK signal power is divided into two paths, one path is connected to the OOK receiving module, and the other path is connected to the second duplexer so as to provide OOK signals for the next-stage active remote unit.
The second duplexer realizes the combination of the OOK signal and the first MIMO signal.
The fifth switch realizes the output or closing function of the MIMO1 signal and the OOK signal after being combined by the duplexer, and is used in cooperation with current detection, namely when the current detection module detects that current exists in the radio frequency feed cable, the switch is switched to a signal output path; when the current detection module detects that no current exists in the radio frequency feed cable, the switch is switched to a grounding state so as to prevent OOK from leaking outwards.
The connection relation of each device and each module of the-48V RTN power-taking circuit is described as follows:
the-48V RTN power-taking circuit of the MIMO1 channel comprises a first radio frequency connector, wherein an outer conductor of the first radio frequency connector is grounded, the first radio frequency connector is connected with a radio frequency feed cable, and an inner conductor of the first radio frequency feed cable is connected with a first power-taking module.
The functions of each device and each module of the-48V RTN power-taking circuit are described as follows:
the first radio frequency joint is in butt joint with the feed access unit through a radio frequency feed cable, and an outer conductor of the radio frequency joint is grounded.
The first radio frequency feeder cable realizes-48V RTN transmission.
The first power taking module realizes that the-48V RTN is taken out of the radio frequency feed cable.
The connection relationship of the devices and modules of the-48V RTN feeder circuit is described as follows:
the-48V RTN feeder circuit of the first MIMO channel comprises a first feeder module, the first feeder module is connected with an inner conductor of a second radio frequency feeder cable, the second radio frequency feeder cable is connected with a second radio frequency connector, and an outer conductor of the second radio frequency connector is grounded.
The current detection circuit of the first MIMO channel includes a current detection module, and the current detection module is connected to the inner conductor of the second rf feed cable.
The functions of the components and modules of the-48V RTN feeder circuit are explained as follows:
the first feeder module enables-48V RTN to be fed into the radio frequency feeder cable.
The second radio frequency feed cable realizes-48V RTN transmission.
The second radio frequency joint is in butt joint with the next-stage active remote unit through a radio frequency feed cable.
The connection relationship between each device and each module of the current detection circuit is described as follows:
the current detection of the first MIMO channel comprises a current detection module, and the current detection module is respectively connected with the second radio frequency feeder cable.
The functions of the various devices and modules of the current sensing circuit are described as follows:
the current detection module realizes the current detection function in the radio frequency feed cable.
The second MIMO channel comprises a second MIMO signal link, a Bluetooth communication link, a-48V power taking circuit and a-48V feed circuit, and mainly realizes the following functions:
1) user access link: amplifying and filtering the uplink and downlink signals of the second MIMO, namely amplifying and filtering the accessed second MIMO signals in the downlink direction and then providing signal coverage through antenna radiation; and in the uplink direction, the accessed terminal signal is amplified, filtered and sent to the feed access unit.
2) Line loss compensation link: and compensating the cable feed loss of the second MIMO signal between the feed access unit and the active remote unit so that the active remote unit can be cascaded with the next-stage active remote unit, and the line loss compensation is simultaneously compensated in downlink and uplink.
3) And receiving a Bluetooth signal from the feeder cable to realize communication with the feed access unit or the upper-stage active remote unit.
4) And separating the Bluetooth signal in the feed cable into a path of Bluetooth signal to feed into the radio frequency feed cable so as to communicate with the next-stage active remote unit.
5) Taking out-48V: and taking out-48V from the accessed radio frequency feeder cable.
6) feeding-48V: feeding-48V into the radio frequency feed cable so as to supply power to the next stage of active remote unit.
The connection relationship between the devices and modules of the second MIMO signal link is described as follows:
the second MIMO signal link of the second MIMO channel includes a third rf connector, the third rf connector is connected to a third rf feeder, the third rf feeder is connected to a first port of a third duplexer, a third port of the third duplexer is connected to a first port of a fourth second power divider, and the fourth second power divider is respectively connected to the second user access link and the second line loss compensation link, which will be described below.
When the fourth second power divider is connected with the second user access link, the third port of the fourth second power divider is connected with the first port of the eighth switch, the second port of the eighth switch is connected with the second downlink user access link, the third port of the eighth switch is connected with the second uplink user access link, the second downlink user access link is connected with the second port of the ninth switch, the second uplink user link is connected with the third port of the ninth switch, the first port of the ninth switch is connected with the second band-pass filter, and the second band-pass filter is connected with the second MIMO antenna.
When the fourth second power divider is connected with the second line loss compensation link, the second port of the fourth second power divider is connected with the first port of the sixth switch, the second port of the sixth switch is connected with the second downlink line loss compensation link, the third port of the sixth switch is connected with the second uplink line loss compensation link, the second downlink line loss compensation link is connected with the second port of the seventh switch, the second uplink line loss compensation link is connected with the third port of the seventh switch, the first port of the seventh switch is connected with the third port of the fourth duplexer, the first port of the fourth duplexer is connected with the first port of the tenth switch, the second port of the tenth switch is connected with the fourth radio frequency feeder cable, the third port of the tenth switch is grounded, and the fourth radio frequency feeder cable is connected with the fourth radio frequency connector.
The functions of the devices and modules of the second MIMO signal link are explained as follows:
the third radio frequency joint is in butt joint with the feed access unit or the upper-stage active remote unit through a radio frequency feed cable.
And the third duplexer realizes the shunting or combining of the second MIMO signal and the Bluetooth signal.
The fourth power divider realizes the power distribution or synthesis of the second MIMO signal, namely, the power of the second MIMO signal is equally distributed to the user access link and the line loss compensation link in the downlink direction; and in the uplink direction, the second MIMO signal of the user access link and the second MIMO signal of the line loss compensation link are subjected to power synthesis.
And the eighth switch realizes the switching of uplink and downlink signals of a user access link.
And the second downlink user access link realizes the amplification and filtering processing of the downlink second MMO signal of the path.
And the second uplink user access link realizes the amplification and filtering processing of the uplink second MIMO signal.
And the ninth switch realizes the switching of uplink and downlink signals of a user access link.
The second band-pass filter realizes channel filtering and out-of-band rejection of the second MIMO signal.
And the sixth switch realizes the switching of the uplink and downlink signals of the line loss compensation link.
And the second downlink line loss compensation link realizes the amplification and filtering processing of the downlink second MIMO signal of the path.
And the second uplink line loss compensation link realizes the amplification and filtering processing of the uplink second MIMO signal.
And the seventh switch realizes the switching of the uplink and downlink signals of the line loss compensation link.
The fourth duplexer realizes the separation or combination of the second MIMO signal and the Bluetooth signal.
The tenth switch realizes the output or closing function of the second MIMO signal and the Bluetooth signal after being combined by the duplexer, and is matched with current detection for use, namely when the current detection module detects that current exists in the radio frequency feed cable, the switch is switched to a signal output channel; when the current detection module detects that no current exists in the radio frequency feed cable, the switch is switched to a grounding state so as to prevent the second MIMO from leaking outwards.
The connection relationship of the devices and modules of the bluetooth communication link is described as follows:
the second MIMO channel Bluetooth communication link comprises a third radio frequency joint, the third radio frequency joint is connected with a third radio frequency feed cable, the third radio frequency feed cable is connected with a first port of a third duplexer, a second port of the third duplexer is connected with a first port of a third second power divider, a second port of the third second power divider is connected with a Bluetooth communication module, and the Bluetooth communication module is connected with the control module; a third port of the third second power divider is connected to a second port of the fourth duplexer, a first port of the fourth duplexer is connected to a first port of a tenth switch, a second port of the tenth switch is connected to a fourth rf feed cable, a third port of the tenth switch is grounded, and the fourth rf feed cable is connected to a fourth rf connector.
The functions of the various devices and modules of the bluetooth communication link are described as follows:
the third radio frequency joint is in butt joint with the feed access unit or the upper-stage active remote unit through a radio frequency feed cable.
And the third duplexer realizes the shunting or combining of the second MIMO signal and the Bluetooth signal.
The third power divider realizes the power equalization or synthesis of the Bluetooth signals, namely, the Bluetooth signals are equally divided into two paths in the downlink direction, and one path is sent to the Bluetooth communication module; the other path feeds the remote link through the fourth duplexer to realize communication with the next-stage remote unit.
The Bluetooth communication module realizes communication with the feed access unit.
The fourth duplexer realizes the separation or combination of the second MIMO signal and the Bluetooth signal.
The tenth switch realizes the output or closing function of the second MIMO signal and the Bluetooth signal after being combined by the duplexer, and is matched with current detection for use, namely when the current detection module detects that current exists in the radio frequency feed cable, the switch is switched to a signal output channel; when the current detection module detects that no current exists in the radio frequency feed cable, the switch is switched to a grounding state so as to prevent the Bluetooth signal from leaking outwards.
The connection relation of each device and each module of the-48V power-taking circuit is described as follows:
the-48V power taking circuit of the second MIMO channel comprises a third radio frequency connector, an outer conductor of the third radio frequency connector is grounded, the third radio frequency connector is connected with a third radio frequency feed cable, and an inner conductor of the third radio frequency feed cable is connected with the second power taking module.
The functions of each device and each module of the-48V power-taking circuit are described as follows:
the third radio frequency joint is in butt joint with the previous stage through a radio frequency feed cable.
The third radio frequency feed cable realizes-48V transmission.
The second power taking module realizes that minus 48V is taken out of the radio frequency feed cable.
The connection relationship of the devices and modules of the-48V feed circuit is described as follows:
the-48V feed circuit of the second MIMO channel comprises a second feed module, the second feed module is connected with an inner conductor of a fourth radio frequency feed cable, the fourth radio frequency feed cable is connected with a fourth radio frequency joint, and an outer conductor of the fourth radio frequency joint is grounded.
The function of the individual components and modules of the-48V feeder circuit is explained below:
the second feeder module realizes feeding-48V into the radio frequency feeder cable.
The fourth radio frequency feed cable realizes-48V transmission.
The fourth radio frequency joint is connected with the next stage through a radio frequency feed cable.
The control module is respectively connected with the OOK receiving module and the Bluetooth communication module.
Referring to fig. 2, to better illustrate the system, the present embodiment provides an indoor coverage system supporting 2-way 3-level cascading.
An indoor coverage system comprises 1 feed access unit, 6 active remote units and 1 power supply unit, and can provide 7-point 2 x 2MIMO signal coverage.
The feed access unit is connected with the information source in a butt joint mode, can provide 2-path signal access, can provide 2 x 2MIMO signal coverage after amplification and filtering processing, and can provide two paths of 2 x 2MIMO signal zooming-out.
The 6 active remote units can provide 2 × 2MIMO signal coverage and also provide one path of 2 × 2MIMO signal remote.
The 6 active remote units are cascaded into two paths, wherein each path is cascaded with 3-level active remote units, and the specific cascade relation is as follows:
wherein, one path has a 3-level cascade relation:
the first-stage first remote unit 1-1 stage is connected with one path of MIMO1 and MIMO2 port of the feed access unit, the first-stage second remote unit 1-2 stage is connected with the first-stage first remote unit 1-1, the first-stage third remote unit 1-3 stage is connected with the first-stage second remote unit 1-2
The cascade port of the first-stage third remote unit 1-3 is grounded through a built-in switch so as to avoid signal leakage.
The other path is in 3-level cascade relation:
the second-level first remote unit 2-1 level is connected with the first MIMO port and the second MIMO port of the feed access unit, the second-level second remote unit 2-2 level is connected with the second-level first remote unit 2-1, and the second-level third remote unit 2-3 level is connected with the second-level second remote unit 2-2.
The cascade port of the second-stage third remote unit 2-3 is grounded through a built-in switch so as to avoid signal leakage.
The access unit supplies power through the power supply unit.
The access unit provides-48V power supply for the cascaded remote units through the radio frequency feeder cable.
The last-stage remote unit supplies power of-48V to the next-stage remote unit through a radio frequency feed cable.
The access unit outputs OOK signals of the information source uplink and downlink switches to each stage of remote units, and each stage of remote units obtains the uplink and downlink switch signals by demodulating the OOK signals.
The cascaded remote units communicate with the access unit through Bluetooth in a master-slave mode, wherein the Bluetooth module of the access unit is the master, and the Bluetooth modules of all levels of the cascaded remote units are the slaves.
The access unit is connected with the remote unit through a radio frequency feeder cable.
The remote unit is connected with the cascade remote unit through a radio frequency feed cable.
Referring to fig. 3, a feed access unit includes a first MIMO channel, a second MIMO channel, and a control module;
the first MIMO channel comprises a first MIMO signal link, the first MIMO signal link is used for receiving input signals, the first MIMO signal link is connected with an OOK signal link, the first MIMO signal link and the OOK signal link are respectively connected with corresponding output connectors through a first radio frequency feed cable and a second radio frequency feed cable, and the first radio frequency feed cable and the second radio frequency feed cable are both connected with a-48 VRTN feed circuit and a current detection circuit;
the second MIMO channel comprises a second MIMO signal link, the second MIMO signal link is used for receiving input signals, the second MIMO signal link is connected with the Bluetooth communication link, the second MIMO signal link and the Bluetooth communication link are respectively connected with corresponding output connectors through a third radio frequency feed cable and a fourth radio frequency feed cable, and the third radio frequency feed cable and the fourth radio frequency feed cable are connected with a-48V feed circuit;
the OOK signal link and the Bluetooth communication link are both connected with the control module, and the control module is used for sending the information source uplink and downlink switching signals to the OOK transmitting module for OOK modulation and monitoring and managing the active remote unit through Bluetooth communication.
The first MIMO signal link comprises a first band-pass filter, the first band-pass filter is used for receiving input signals, the first band-pass filter is connected with a first port of a first switch, a second port of the first switch is connected with a first downstream amplifying and filtering radio frequency link, a third port of the first switch is connected with a first upstream amplifying and filtering radio frequency link, the first downstream amplifying and filtering radio frequency link is connected with a second port of a second switch, the first upstream amplifying and filtering radio frequency link is connected with a third port of the second switch, a first port of the second switch is connected with a second band-pass filter, the second band-pass filter is connected with an input port of a first coupler, a first MIMO antenna is connected with an output port of the first coupler, a coupling port of the first coupler is connected with a third band-pass filter, the third band-pass filter is connected with a first port of a first electric bridge, a second port of the first electric bridge is connected with a first port of a third switch, the second port of the third switch is connected with a first radio frequency feed cable, the first radio frequency feed cable is connected with a first radio frequency joint, the third port of the third switch is grounded, the fourth port of the bridge is connected with the first port of the fourth switch, the second port of the fourth switch is connected with a second radio frequency feed cable, the second radio frequency feed cable is connected with a second radio frequency joint, and the third port of the fourth switch is grounded.
The OOK signal link comprises an OOK transmitting module, the OOK transmitting module is connected with a second port of the first bridge, a third port of the first bridge is connected with a first port of a third switch, a second port of the third switch is connected with a first radio frequency feed cable, the first radio frequency feed cable is connected with a first radio frequency joint, a third port of the third switch is grounded, a fourth port of the first bridge is connected with a first port of a fourth switch, a second port of the fourth switch is connected with a second radio frequency feed cable, the second radio frequency feed cable is connected with a second radio frequency joint, and a third port of the fourth switch is grounded.
The 48V RTN feeder circuit comprises a first feeder module, the first feeder module is respectively connected with a first radio frequency feeder cable and a second radio frequency feeder cable, the first radio frequency feeder cable is connected with a first radio frequency connector, and an outer conductor of the first radio frequency connector is grounded; the second radio frequency feed cable is connected with the second radio frequency connector, and an outer conductor of the second radio frequency connector is grounded.
The second MIMO channel comprises a fourth band-pass filter, the fourth band-pass filter is connected with a first port of a fifth switch, a second port of the fifth switch is connected with a second downlink amplifying and filtering radio frequency link, a third port of the fifth switch is connected with a second uplink amplifying and filtering radio frequency link, a second downlink user access link is connected with a second port of a sixth switch, a second uplink user access link is connected with a third port of the sixth switch, a first port of the sixth switch is connected with a fifth band-pass filter, the fifth band-pass filter is connected with an input port of a second coupler, an output port of the second coupler is connected with a second MIMO antenna, a coupling port of the second coupler is connected with a sixth band-pass filter, the sixth band-pass filter is connected with a second port of a second bridge, a third port of the second bridge is connected with a first port of a seventh switch, and a second port of the seventh switch is connected with a third radio frequency feed cable, the third port of the seventh switch is grounded, the third radio frequency feed cable is connected with the third radio frequency connector, the fourth port of the second bridge is connected with the first port of the eighth switch, the second port of the eighth switch is connected with the fourth radio frequency feed cable, the fourth radio frequency feed cable is connected with the fourth radio frequency connector, and the third port of the eighth switch is grounded.
The Bluetooth communication link comprises a Bluetooth communication module, the Bluetooth communication module is connected with a first port of a second bridge, a third port of the second bridge is connected with a first port of a seventh switch, a second port of the seventh switch is connected with a third radio frequency feed cable, a third electric port of the seventh switch is grounded, the third radio frequency feed cable is connected with a third radio frequency connector, a fourth port of the second bridge is connected with a first port of an eighth switch, a second port of the eighth switch is connected with a fourth radio frequency feed cable, the fourth radio frequency feed cable is connected with a fourth radio frequency connector, and a third port of the eighth switch is grounded.
the-48V feed circuit comprises a second feed module, the second feed module is respectively connected with a third radio frequency feed cable and a fourth radio frequency feed cable, the third radio frequency feed cable is connected with a third radio frequency joint, the outer conductor of the third radio frequency joint is grounded, the fourth radio frequency feed cable is connected with a fourth radio frequency joint, and the outer conductor of the fourth radio frequency joint is grounded.
Claims (10)
1. An active remote unit is characterized by comprising a first MIMO channel, a second MIMO channel and a control module;
the first MIMO channel comprises a first MIMO signal link and an OOK signal link, the first MIMO signal link and the OOK signal link are both connected with a first duplexer, the first duplexer is connected with a first radio frequency connector, the first radio frequency connector is connected with an information source, the first MIMO signal link and the OOK signal link are both connected with a second duplexer, and the second duplexer is connected with a second radio frequency connector;
the second MIMO channel comprises a second MIMO signal link and a Bluetooth communication link, the second MIMO signal link and the Bluetooth communication link are both connected with a third duplexer, the third duplexer is connected with a third radio frequency connector, the third radio frequency connector is connected with an information source, the second MIMO signal link and the Bluetooth communication link are both connected with a fourth duplexer, and the fourth duplexer is connected with a fourth radio frequency connector;
the OOK signal link and the Bluetooth communication link are both connected with a control module, and the control module is used for sending signals of the information source to an OOK transmitting module for OOK modulation.
2. The active remote unit of claim 1, wherein the first MIMO signal link comprises a first rf connector, the first rf connector is connected to a first rf feed cable, the first rf feed cable is connected to a first port of a first duplexer, a second port of the first duplexer is connected to a first port of a first duplexer, a second port and a third port of the first duplexer are respectively connected to a first user access link and a first line loss compensation link, the first user access link is connected to the first MIMO antenna, the first line loss compensation link is connected to a second port of a second duplexer, the first port of the second duplexer is connected to a first port of a fifth switch, the second port of the fifth switch is connected to a second rf feed cable, a third port of the fifth switch is grounded, and the second rf feed cable is connected to the second rf connector;
the first radio frequency feed cable is connected with the first power taking module, and the second radio frequency feed cable is connected with the first feed module and the current detection module.
3. The active remote unit of claim 1, wherein the first user access link comprises a first switch, a first port of the first switch is connected to the second port of the first binary power, a second port of the first switch is connected to the first downlink user access link, a third port of the first switch is connected to the first uplink user access link, the first downlink user access link is connected to the second port of the second switch, the first uplink user access link is connected to the third port of the second switch, the first port of the second switch is connected to the first bandpass filter, and the first bandpass filter is connected to the first MIMO antenna.
4. The active remote unit of claim 1, wherein the first line loss compensation link comprises a third switch, a first port of the third switch is connected to a third port of the first diode, a second port of the third switch is connected to the first downlink line loss compensation link, a third port of the third switch is connected to the first line uplink loss compensation link, the first downlink line loss compensation link is connected to a second port of the fourth switch, the first uplink line loss compensation link is connected to a third port of the fourth switch, and a first port of the fourth switch is connected to a second port of the second duplexer.
5. The active remote unit according to claim 1, wherein the OOK signal link includes an OOK receiving module, the OOK receiving module is connected to a third port of the second power division, a second port of the second power division is connected to a third port of the second duplexer, a first port of the second power division is connected to a third port of the first duplexer, and the OOK receiving module is connected to the control module.
6. The active remote unit according to claim 1, wherein the second MIMO signal link comprises a third rf connector, the third rf connector is connected to a third rf feed cable, the third rf feed cable is connected to a first port of a third duplexer, a third port of the third duplexer is connected to a first port of a fourth second power divider, a third port and a second port of the fourth power divider are respectively connected to a second user access link and a second loss compensation link, the second user access link is connected to the second loss compensation link, the second loss compensation link is connected to a third port of a fourth duplexer, the first port of the fourth duplexer is connected to a first port of a tenth switch, the second port of the tenth switch is connected to a fourth rf feed cable, the third port of the tenth switch is grounded, and the fourth rf feed cable is connected to the fourth rf connector;
the third radio frequency feed cable is connected with the second power taking module, and the fourth radio frequency feed cable is connected with the second feed module.
7. The active remote unit according to claim 1, wherein the second user access link comprises an eighth switch, a first port of the eighth switch is connected to a third port of the fourth second power divider, a second port of the eighth switch is connected to the second downlink user access link, a third port of the eighth switch is connected to the second uplink user access link, the second downlink user access link is connected to a second port of the ninth switch, the second uplink user link is connected to a second port of the ninth switch, a first port of the ninth switch is connected to the second band-pass filter, and the second band-pass filter is connected to the second MIMO antenna.
8. The active remote unit of claim 1, wherein the second loss compensation link comprises a sixth switch, a first port of the sixth switch is connected to the second port of the fourth second power divider, a second port of the sixth switch is connected to the second downlink loss compensation link, a third port of the sixth switch is connected to the second uplink loss compensation link, the second downlink loss compensation link is connected to the second port of the seventh switch, the second uplink loss compensation link is connected to the third port of the seventh switch, the first port of the seventh switch is connected to the third port of the fourth duplexer, the first port of the fourth duplexer is connected to the first port of the tenth switch, the second port of the tenth switch is connected to the fourth rf feed cable, the third port of the tenth switch is grounded, and the fourth rf feed cable is connected to the fourth rf connector.
9. The active remote unit of claim 1, wherein the bluetooth communication link comprises a bluetooth communication module, the bluetooth communication module is connected to the second port of the third power divider, the third port of the third power divider is connected to the second port of the fourth duplexer, the first port of the third power divider is connected to the second port of the third duplexer, and the bluetooth communication module is connected to the control module.
10. An indoor coverage system of active remote unit based on claim 1, comprising a feed access unit and a plurality of active remote units, wherein the feed access unit is connected with the information source, the feed access unit is connected with the power supply unit, the output connector of the feed access unit is connected with the plurality of active remote units in series, and all signals are grounded in the last active remote unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667889.5ACN114286355B (en) | 2021-12-30 | 2021-12-30 | Active remote unit and indoor coverage system based on same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667889.5ACN114286355B (en) | 2021-12-30 | 2021-12-30 | Active remote unit and indoor coverage system based on same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114286355Atrue CN114286355A (en) | 2022-04-05 |
| CN114286355B CN114286355B (en) | 2024-03-22 |
Family
ID=80879547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111667889.5AActiveCN114286355B (en) | 2021-12-30 | 2021-12-30 | Active remote unit and indoor coverage system based on same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114286355B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201044493Y (en)* | 2007-02-13 | 2008-04-02 | 杰脉通信技术(上海)有限公司 | TD-SCDMA indoor distribution system |
| CN102624472A (en)* | 2012-03-13 | 2012-08-01 | 中兴通讯股份有限公司 | Method and device for multi-channel link calibration of active antenna |
| CN102761352A (en)* | 2011-08-01 | 2012-10-31 | 深圳市云海通讯股份有限公司 | FDD-LTE (Frequency Division Duplexing-Long Term Evolution) indoor coverage system and signal transmission method |
| CN103973396A (en)* | 2013-01-29 | 2014-08-06 | 中兴通讯股份有限公司 | Method and device for transmitting wireless base band data and radio frequency zooming-out module RRU |
| WO2016023955A1 (en)* | 2014-08-12 | 2016-02-18 | Kathrein-Werke Kg | Method and system for relaying telecommunications signals |
| CN105491577A (en)* | 2016-01-22 | 2016-04-13 | 北京邮电大学 | Asymmetric single-double current hybrid indoor coverage system |
| CN106357310A (en)* | 2016-09-14 | 2017-01-25 | 京信通信系统（中国）有限公司 | Multi-input multi-output signal transmission method and system |
| CN110266326A (en)* | 2019-06-19 | 2019-09-20 | 成都星联芯通科技有限公司 | A kind of Integrated Service Digital Network radio-frequency front-end control method and its system based on OOK |
| CN209692750U (en)* | 2019-06-26 | 2019-11-26 | 北京唯得科技有限公司 | A kind of novel room 5G subsystem |
- 2021
- 2021-12-30CNCN202111667889.5Apatent/CN114286355B/enactiveActive
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201044493Y (en)* | 2007-02-13 | 2008-04-02 | 杰脉通信技术(上海)有限公司 | TD-SCDMA indoor distribution system |
| CN102761352A (en)* | 2011-08-01 | 2012-10-31 | 深圳市云海通讯股份有限公司 | FDD-LTE (Frequency Division Duplexing-Long Term Evolution) indoor coverage system and signal transmission method |
| CN102624472A (en)* | 2012-03-13 | 2012-08-01 | 中兴通讯股份有限公司 | Method and device for multi-channel link calibration of active antenna |
| CN103973396A (en)* | 2013-01-29 | 2014-08-06 | 中兴通讯股份有限公司 | Method and device for transmitting wireless base band data and radio frequency zooming-out module RRU |
| WO2016023955A1 (en)* | 2014-08-12 | 2016-02-18 | Kathrein-Werke Kg | Method and system for relaying telecommunications signals |
| US20170230101A1 (en)* | 2014-08-12 | 2017-08-10 | Kathrein-Werke Kg | Method and system for relaying telecommunications signals |
| CN105491577A (en)* | 2016-01-22 | 2016-04-13 | 北京邮电大学 | Asymmetric single-double current hybrid indoor coverage system |
| CN106357310A (en)* | 2016-09-14 | 2017-01-25 | 京信通信系统（中国）有限公司 | Multi-input multi-output signal transmission method and system |
| CN110266326A (en)* | 2019-06-19 | 2019-09-20 | 成都星联芯通科技有限公司 | A kind of Integrated Service Digital Network radio-frequency front-end control method and its system based on OOK |
| CN209692750U (en)* | 2019-06-26 | 2019-11-26 | 北京唯得科技有限公司 | A kind of novel room 5G subsystem |
Non-Patent Citations (3)
| Title |
|---|
| ZTE: "R1-104961 "Considerations on downlink control signalling design for LTE-A DL MIMO"", 3GPP TSG_RAN\\WG1_RL1, no. 1* |
| 杨军;张力方;: "光纤分布系统应用研究", 电信技术, no. 2* |
| 黄超;: "3G室内覆盖快速计算方法", 移动通信, no. 23* |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114286355B (en) | 2024-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4142046A1 (en) | Distributed antenna system | |
| EP1999856B1 (en) | A radio base station system, a node in a cellular mobile communications network, and a splitter device | |
| CN111770505B (en) | Communication control unit, near-end connection module, far-end covering module and indoor distribution system | |
| US3636452A (en) | Radio relay system | |
| CN103227666B (en) | Leaky cable communication system | |
| CN103078654A (en) | Wireless signal receiving and sending antenna system, coupling amplification device and signal processing method | |
| CN210327552U (en) | Dual-mode wireless communication device and railway vehicle-mounted equipment formed by same | |
| CN103023573B (en) | Digital optical fiber repeater system for frequency modulation broadcast | |
| CN101742528A (en) | System for realizing indoor coverage in CDMA network | |
| CN114286355A (en) | Active remote unit and indoor coverage system based on same | |
| CN212588328U (en) | Self-feeding wireless communication system | |
| CN111147119B (en) | DAS combiner system | |
| CN114302416A (en) | Feed access unit and indoor coverage system based on same | |
| EP0894372B1 (en) | Channel-selective repeater for mobile telephony | |
| CN201590911U (en) | Wireless communication far-end apparatus | |
| CN111866899A (en) | Indoor microdistribution system and method for 5G mobile communication | |
| CN110365369A (en) | A kind of power carrier communication system for supporting long distance transmission | |
| CN201369606Y (en) | Power supply switching device for optical fiber repeater far-end machine | |
| CN216290929U (en) | Emergency frequency modulation broadcasting system | |
| CN216122385U (en) | Combined circuit for TDD and FDD working simultaneously | |
| CN108260129B (en) | Subway communication device and subway communication system | |
| CN212969930U (en) | Novel extension coverage end and system of 5G indoor sub-base station | |
| CN211769564U (en) | Novel access unit of distributed elevator signal amplification system | |
| CN203014800U (en) | Wireless signal receiving and transmitting antenna system and signal coupling amplifying device | |
| CN103165967B (en) | A kind of coupler and the common transport system based on repeater room subsystem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |