CN106559110B - Active antenna, carrier aggregation method and system - Google Patents
Active antenna, carrier aggregation method and system Download PDFInfo
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- CN106559110B CN106559110B CN201510638906.0A CN201510638906A CN106559110B CN 106559110 B CN106559110 B CN 106559110B CN 201510638906 A CN201510638906 A CN 201510638906A CN 106559110 B CN106559110 B CN 106559110B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
Abstract
The invention discloses an active antenna, a carrier aggregation method and a carrier aggregation system. The method comprises the following steps: including passive antenna array and active antenna array, wherein: the passive antenna array is used for receiving the first frequency band transmitting data transmitted by the remote radio unit and transmitting the data outwards; receiving first frequency band receiving data and transmitting the first frequency band receiving data to a radio remote unit, wherein the radio remote unit is connected with a baseband processing unit so as to realize the transmission of the first frequency band data between an active antenna and the baseband processing unit; the active antenna array is used for receiving the second frequency band transmitting data sent by the baseband processing unit and transmitting the second frequency band transmitting data outwards; and receiving the received data of the first frequency band and the second frequency band, and transmitting the received data to the baseband processing unit. By adopting the active antenna of the invention to directly replace the passive antenna of the existing network, the step of upgrading the existing network to the carrier aggregation network is simplified, thereby reducing the construction difficulty and the network construction cost and effectively improving the capacity and the peak rate of the LTE system.
Description
Technical Field
The invention relates to the technical field of LTE (Long Term Evolution), in particular to an active antenna, a carrier aggregation method and a carrier aggregation system.
Background
At present, LTE networks are widely deployed around the world, and the rate and capacity of 4G networks are greatly improved compared to 3G networks. However, with the development of mobile internet, the demand of data service is increasing explosively, and new and higher requirements are put on network capacity, bandwidth, peak rate and the like. Carrier aggregation, which is one of the most effective means for dealing with explosive growth of data services, is increasing network capacity by means of spectrum spreading, and is receiving wide attention.
Carrier aggregation is a core technology of LTE-a (LTE-Advanced, evolution of LTE), and can combine two or more carriers in the same or different frequency bands into one channel, thereby increasing the peak rate of an LTE cell by multiple times. Meanwhile, the technology can also effectively avoid the same frequency interference of adjacent cells, improve the performance of the LTE network, more flexibly realize the load balance between the main cell and the auxiliary cell and improve the network capacity. The application of the carrier aggregation technology can enable operators to provide higher-speed and richer service experience for mobile users, better cope with explosive growth of data service flow, and improve competition of an LTE network.
The deployment of the carrier aggregation network is generally based on the upgrade and modification of the existing LTE network, and a new frequency band is added by adding an antenna and a radio remote unit, so as to implement carrier aggregation with the deployed frequency band. There are two common network upgrade methods, as shown in fig. 1 and 2.
The upgrade method in fig. 1 is implemented by adding an antenna, a radio remote unit RRU in another frequency band, and a baseband processing unit BBU, and the upgrade method has the following disadvantages and problems:
(1) an antenna holding pole needs to be additionally arranged, and the space of the ceiling is increased. Due to the factors of co-construction and sharing of multiple operators, coexistence of multiple 2G/3G/4G networks and the like, the space of the sky of most sites is very limited at present, and a pole cannot be newly added, so that the upgrading mode is greatly limited.
(2) Due to the factors of resident frustration and the like, the newly added antenna holding pole brings great difficulty to construction. In addition, the project of newly adding the pole, installing the antenna, the RRU and other equipment greatly improves the network construction cost and the later maintenance cost.
In the upgrade method of fig. 2, an existing network antenna is utilized, and an external combiner, a radio frequency unit RRU of another frequency band, and a baseband processing unit are added, so that the upgrade method has the following disadvantages and problems:
(1) the newly-added external combiner is customized due to the requirement, the structure is complex, the requirement on environmental adaptability is high, the design and production cost is high, the price is high, and the networking cost is greatly improved.
(2) The number of ports of the newly-added external combiner is large, so that connection is easy to make mistakes during construction, system fault points are greatly increased, and construction time and construction cost are greatly improved.
(3) The newly-added external combiner is a passive device, cannot be monitored in real time through a system, and becomes a monitoring blind spot of the system, and once a fault occurs, the fault is difficult to find, so that great difficulty is brought to later-stage network maintenance.
(4) The existing network frequency band and the newly added frequency band can not realize independent electric regulation control and can not realize independent optimization of the two frequency bands.
Disclosure of Invention
In view of the above technical problems, the present invention provides an active antenna, a carrier aggregation method and a system, which can simplify the step of upgrading the existing network to a carrier aggregation network, reduce the construction difficulty and the network construction cost, and effectively improve the capacity and the peak rate of the LTE system.
According to an aspect of the invention, there is provided an active antenna comprising a passive antenna array and an active antenna array, wherein: the passive antenna array is used for receiving the first frequency band transmitting data transmitted by the remote radio unit and transmitting the data outwards; receiving first frequency band receiving data and transmitting the first frequency band receiving data to a radio remote unit, wherein the radio remote unit is connected with a baseband processing unit so as to realize the transmission of the first frequency band data between an active antenna and the baseband processing unit; the active antenna array is used for receiving the second frequency band transmitting data sent by the baseband processing unit and transmitting the second frequency band transmitting data outwards; and receiving the received data of the first frequency band and the second frequency band, and transmitting the received data to the baseband processing unit.
In one embodiment of the present invention, an active antenna array includes element modules supporting a first frequency band and a second frequency band; the vibrator module is a cross polarization vibrator; the cross-polarized dipole includes a first polarized dipole and a second polarized dipole.
In one embodiment of the present invention, each of the cross-polarized oscillators is connected to three rf links, respectively, where the three rf links include a first receiving link, a second receiving link, and a transmitting link, where: the first receiving link comprises a digital processing control module, a first low-noise amplifier, a first filter and a duplexer which are connected in sequence; the second receiving link comprises a digital processing control module, a second low-noise amplifier, a second filter and a duplexer which are connected in sequence; the polarized oscillator is connected with the duplexer; after being isolated by a duplexer, a receiving signal of a first receiving link and a receiving signal of a second receiving link are respectively subjected to filtering, low-noise amplification and analog-to-digital conversion and then are sent to a baseband processing unit; the transmitting link comprises a digital processing control module, a power amplifier and a third filter which are connected in sequence and is used for directly transmitting a transmitting signal out by a polarization oscillator after digital-to-analog conversion, frequency conversion processing, power amplification and filtering; the polarization vibrator is also connected with a third filter.
In one embodiment of the present invention, each frequency band is configured with four receiving channels and two transmitting channels; in the four paths of received data of the first frequency band, two paths are received through the passive antenna array, and the other two paths are received through the active antenna array; two paths of transmitting data of a first frequency band are transmitted through the passive antenna array; the four paths of received data of the second frequency band realize multi-beam receiving processing through the beam forming function of the active antenna array; and the two paths of transmission data of the second frequency band are transmitted through the active antenna array.
In one embodiment of the invention, the passive antenna array comprises an electrical tuning control interface; for a first frequency band, adjusting a downward inclination angle through the electric regulation control interface; and for the second frequency band, adjusting the downward inclination angle through the beam forming function of the active antenna array.
According to another aspect of the present invention, there is provided a carrier aggregation system, including an active antenna, a radio remote unit, and a baseband processing unit, wherein: an active antenna as described in any of the above embodiments; the radio remote unit is used for realizing the transmission of the first frequency band data between the active antenna and the baseband processing unit; and the baseband processing unit is used for carrying out carrier aggregation on the first frequency band signal and the second frequency band signal.
In one embodiment of the present invention, the baseband processing unit includes a first baseband, a second baseband, and a carrier aggregation module, wherein: the first baseband is used for sending first frequency band transmitting data to the radio remote unit; receiving first frequency band receiving data transmitted by the radio remote unit and first frequency band receiving data forwarded by the second baseband, and merging the first frequency band receiving data and the second frequency band receiving data; the second baseband is used for sending second frequency band transmission data to the active antenna; receiving first frequency band receiving data and second frequency band receiving data transmitted by an active antenna, and forwarding the first frequency band receiving data transmitted by the active antenna to a first baseband; and the carrier aggregation module is used for carrying out carrier aggregation on the signals of the first frequency band and the second frequency band.
According to another aspect of the present invention, there is provided a carrier aggregation method, including: a passive antenna array of the active antenna receives the first frequency band receiving data and transmits the data to the baseband processing unit through the radio frequency remote unit; an active antenna array of the active antenna receives the first frequency band receiving data and the second frequency band receiving data and transmits the first frequency band receiving data and the second frequency band receiving data to the baseband processing unit; and the baseband processing unit carries out carrier aggregation on the first frequency band signal and the second frequency band signal.
In one embodiment of the invention, the method further comprises: the baseband processing unit sends the first frequency band transmitting data to a passive antenna array of an active antenna through the radio frequency remote unit for transmitting; and the baseband processing unit sends the second frequency band transmission data to an active antenna array of the active antenna for transmission.
In one embodiment of the invention, the method further comprises: the active antenna array of the active antenna realizes the receiving processing of the multi-path second frequency band receiving data through the beam forming function; the baseband processing unit combines the first frequency band received data received by the passive antenna array and the first frequency band received data received by the active antenna array.
In one embodiment of the invention, the method further comprises: for a first frequency band, adjusting a downward inclination angle through an electric tuning control interface arranged on a passive antenna array of an active antenna; and for the second frequency band, adjusting the downward inclination angle through the beam forming function of the active antenna array.
The active antenna of the invention is adopted to directly replace the passive antenna of the existing network, the existing network can be directly upgraded into the carrier aggregation system without increasing the antenna holding pole, the number of the connecting ports is small, the construction interface is simple, and the step of upgrading the existing network into the carrier aggregation network can be simplified, thereby reducing the construction difficulty and the network construction cost and effectively improving the capacity and the peak rate of the LTE system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of an existing LTE network upgrade method.
Fig. 2 is a schematic diagram of another embodiment of an existing LTE network upgrade method.
Fig. 3 is a schematic diagram of a carrier aggregation system according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an active antenna array in an embodiment of the invention.
Fig. 5 is a schematic diagram of a baseband processing unit according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a carrier aggregation method according to an embodiment of the present invention.
Fig. 7 is a diagram illustrating a carrier aggregation method according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 3 is a schematic diagram of a carrier aggregation system according to an embodiment of the present invention. As shown in fig. 3, the carrier aggregation system includes an active antenna 70, a radio remote unit 80, and a baseband processing unit 30, where:
an active antenna 70, configured to receive first frequency band transmission data (first frequency band downlink data) transmitted by the remote radio unit 80, and transmit the first frequency band transmission data to the outside; receiving first frequency band reception data (first frequency band uplink data), and transmitting the first frequency band reception data to the remote radio unit 80; receiving second frequency band transmission data (second frequency band downlink data) sent by the baseband processing unit 30, and transmitting the second frequency band transmission data to the outside; the received data (second frequency band uplink data) of the first frequency band and the second frequency band are received and transmitted to the baseband processing unit 30.
In one embodiment of the present invention, the first frequency band may be 1.8G; the second frequency band may be 2.1G.
And the remote radio unit 80 is used for realizing the transmission of the data of the first frequency band between the active antenna 70 and the baseband processing unit 30.
In one embodiment of the present invention, the remote radio unit 80 may be the existing network remote radio unit 20 in fig. 1 or fig. 2.
The baseband processing unit 30 is configured to perform carrier aggregation on the first frequency band signal and the second frequency band signal.
Based on the carrier aggregation system provided by the embodiment of the invention, the passive antenna of the existing network is directly replaced by the active antenna, the existing network can be directly upgraded into the carrier aggregation system without increasing an antenna holding pole, the number of the connecting ports is small, the construction interface is simple, and the step of upgrading the existing network into the carrier aggregation network can be simplified, so that the construction difficulty and the network construction cost are reduced, and the capacity and the peak rate of the LTE system can be effectively improved.
In one embodiment of the present invention, as shown in fig. 3, the active antenna 70 may include a passive antenna array 71 and an active antenna array 72, wherein:
the passive antenna array 71 is configured to receive the first frequency band transmission data transmitted by the remote radio unit 80 and transmit the first frequency band transmission data to the outside; the first frequency band received data is received and transmitted to the remote radio unit 80.
In an embodiment of the present invention, as shown in fig. 3, the passive antenna array may provide two rf interfaces in the first frequency band, and the two rf interfaces are connected to the remote radio unit 80.
The active antenna array 72 is configured to receive the second frequency band transmission data sent by the baseband processing unit 30 and transmit the second frequency band transmission data to the outside; the received data of the first frequency band and the second frequency band are received and transferred to the baseband processing unit 30.
In an embodiment of the present invention, as shown in fig. 3, the active antenna array includes a Common Public Radio Interface (CPRI) optical fiber Interface, and the active antenna array is connected to the baseband processing unit through the CPRI optical fiber.
Based on the active antenna provided by the embodiment of the invention, the passive antenna of the existing network can be directly replaced, the existing network can be directly upgraded into a carrier aggregation system without adding an antenna holding pole, the number of the connecting ports is small, the construction interface is simple, and the step of upgrading the existing network into the carrier aggregation network can be simplified, so that the construction difficulty and the network construction cost are reduced; the embodiment of the invention adopts the active broadband receiver processing and the signal combination processing of the baseband unit, and tightly integrates the active array and the passive array, thereby realizing the active antenna system of carrier aggregation, and effectively improving the capacity and peak rate of the LTE system.
In an embodiment of the present invention, the passive antenna array 71 uses an element module supporting the first frequency band for connecting the remote radio units in the frequency band of the existing network (the first frequency band) to replace the passive antenna of the existing network.
In one embodiment of the present invention, the active antenna array 72 may include element modules supporting a first frequency band and a second frequency band.
In one embodiment of the invention, the element modules of the active antenna array 72 may be cross-polarized elements. The cross-polarized dipole may include a first polarized dipole and a second polarized dipole.
In a preferred embodiment of the invention, the cross-polarized dipole is a broadband ± 45 ° cross-polarized dipole comprising a +45 ° polarized dipole and a-45 ° polarized dipole.
Fig. 4 is a schematic diagram of an active antenna array in an embodiment of the invention. As shown in fig. 4, the active antenna array may include cross-polarized elements 721, where:
each of the cross-polarized oscillators 721 is connected to three rf links, respectively, where the three rf links are a first receiving link, a second receiving link, and a transmitting link, where:
the first receiving chain includes a digital processing control module 726, a first low noise amplifier 7241, a first filter 7231, and a duplexer 722, which are connected in sequence. The second receive chain includes a digital processing control module 726, a second low noise amplifier 7242, a second filter 7232, and a duplexer 722, connected in sequence. The polarization oscillator 721 is connected to the duplexer 722.
After the received signal of the first receive chain and the received signal of the second receive chain are isolated by the duplexer 722, they are respectively filtered by the filter (7231 or 7232), low-noise amplified by the low-noise amplifier (7241 or 7242), and analog-to-digital converted by the digital processing control module 726, and then they are transmitted to the baseband processing unit 30.
The transmitting link comprises a digital processing control module 726, a power amplifier 725 and a third filter 7233 which are connected in sequence; the polarization vibrator 721 is also connected to a third filter 7233.
The transmitting link is used for directly transmitting the transmitting signal out by the polarization oscillator after the transmitting signal is subjected to digital-to-analog conversion and frequency conversion processing by the digital processing control module 726, power amplification by the power amplifier 725 and filtering by the third filter 7233.
In one embodiment of the present invention, the passive antenna array 71 may include an electrically tunable control interface. Therefore, for the first frequency band, the downward inclination angle can be adjusted through the electric regulation control interface. For the second frequency band, the downtilt angle can be adjusted through the beamforming function of the active antenna array. Therefore, the embodiment of the invention can realize the independent electric regulation control of each sub-frequency band of carrier aggregation.
Fig. 5 is a schematic diagram of a baseband processing unit according to an embodiment of the present invention. As shown in fig. 5, the baseband processing unit 30 shown in fig. 3 may include a first baseband 33, a second baseband 34, and a carrier aggregation module 35, where:
a first baseband 33, configured to send first frequency band transmission data to the remote radio unit 80; the first frequency band received data transferred by the remote radio unit 80 and the first frequency band received data forwarded by the second baseband 34 are received and combined.
A second baseband 34 for transmitting second band transmission data to the active antenna 70; receiving the first frequency band receiving data and the second frequency band receiving data transferred by the active antenna 70, and forwarding the first frequency band receiving data transferred by the active antenna 70 to the first baseband 33.
The carrier aggregation module 35 is configured to perform carrier aggregation on the first frequency band signal and the second frequency band signal.
In an embodiment of the present invention, the carrier aggregation module 35 may perform continuous or discontinuous carrier aggregation on the signals of the first frequency band and the second frequency band.
The embodiment of the invention can aggregate 2-5 LTE member carriers together, realize the maximum transmission bandwidth of 100MHz and effectively improve the uplink and downlink transmission rate.
In one embodiment of the present invention, each of the first and second frequency bands may be configured with four receive channels and two transmit channels.
Of the four paths of received data of the first frequency band, two paths are received by the passive antenna array 71, and the other two paths are received by the active antenna array 72; the two transmission data of the first frequency band are transmitted through the passive antenna array 71.
In the above embodiment of the present invention, the active wideband receiver is used for processing, so that the active antenna can be used to realize the joint reception of signals in the first frequency band and the second frequency band, the number of ports of the uplink receiving antenna in the first frequency band is increased, and the baseband processing part combines the multiple paths of uplink data in the first frequency band, thereby realizing the uplink coverage enhancement in the first frequency band.
In an embodiment of the present invention, as shown in fig. 4, the four paths of received data in the second frequency band implement multi-beam receiving processing through the beam forming function of the active antenna array 72; the two-way transmit data in the second frequency band is transmitted via the active antenna array 72.
In the above embodiment of the present invention, the active antenna system can implement receiving processing of the second frequency band multi-path uplink data through the beamforming function, thereby implementing uplink coverage enhancement of the second frequency band and satisfying the same coverage requirement as the first frequency band.
Fig. 6 is a schematic diagram of a carrier aggregation method according to an embodiment of the present invention. Preferably, this embodiment may be performed by the carrier aggregation system of the present invention. The method comprises the following steps:
Based on the carrier aggregation method provided by the embodiment of the invention, the active array and the passive array are tightly integrated through active broadband receiver processing and signal combination processing of the baseband unit, so that carrier aggregation of signals of the first frequency band and the second frequency band is realized, and the capacity and the peak rate of an LTE system can be effectively improved.
In one embodiment of the present invention, the method may further comprise: the baseband processing unit carries out carrier aggregation on the first frequency band signal and the second frequency band signal; the baseband processing unit sends the first frequency band transmitting data to a passive antenna array of an active antenna through the radio frequency remote unit for transmitting; and the baseband processing unit sends the second frequency band transmission data to an active antenna array of the active antenna for transmission.
The embodiment of the invention can also realize the carrier aggregation of the signals of the first frequency band and the second frequency band, thereby effectively improving the uplink and downlink transmission rate.
Fig. 7 is a diagram illustrating a carrier aggregation method according to another embodiment of the present invention. Preferably, this embodiment may be performed by the carrier aggregation system of the present invention. The method comprises the following steps:
In step 702, the active antenna array of the active antenna receives the first frequency band receiving data and transmits the first frequency band receiving data to the baseband processing unit.
And 703, the active antenna array of the active antenna realizes the receiving processing of the multi-path second frequency band receiving data through the beam forming function.
In the above embodiment of the present invention, the active wideband receiver is used for processing, so that the active antenna can be used to realize the joint reception of signals in the first frequency band and the second frequency band, the number of ports of the uplink receiving antenna in the first frequency band is increased, and the baseband processing part combines the multiple paths of uplink data in the first frequency band, thereby realizing the uplink coverage enhancement in the first frequency band. In the above embodiment of the present invention, the active antenna system can implement receiving processing of the second frequency band multi-path uplink data through the beamforming function, thereby implementing uplink coverage enhancement of the second frequency band and satisfying the same coverage requirement as the first frequency band.
In an embodiment of the present invention, the carrier aggregation method further includes: for a first frequency band, adjusting a downward inclination angle through an electric tuning control interface arranged on a passive antenna array of an active antenna; and for the second frequency band, adjusting the downward inclination angle through the beam forming function of the active antenna array. Therefore, the embodiment of the invention can realize the independent electric regulation control of each sub-frequency band of carrier aggregation.
The invention is illustrated below by specific examples:
as shown in fig. 3, if the current network is in the 1.8G frequency band, a pair of 4-port passive antennas is used to connect the 2-transmit 4-receive remote radio units 80, and the RRU is connected to the baseband processing unit 30 through the CPRI optical fiber interface. The objective of the carrier aggregation network modification is to add a 2.1G frequency band to the existing network and implement carrier aggregation between a 1.8G frequency band and a 2.1G frequency band, and both the 1.8G frequency band and the 2.1G frequency band are required to be configured as 2-transmission and 4-reception.
The active antenna in any of the above embodiments of the present invention is used to directly replace a passive antenna of an existing network, wherein two radio frequency ports of a 1.8G frequency band are connected to two ports of an existing network RRU (originally, the other two ports responsible for receiving only are suspended), and a CPRI optical fiber interface of a 2.1G active antenna is connected to an existing network BBU.
In this way, in 4 uplink paths of reception in the 1.8G frequency band, two uplink paths are received through the passive antenna array, the other two uplink paths are received through the active antenna array, and four uplink paths of signals are combined in the baseband unit. The uplink 4-path receiving of the 2.1G frequency band realizes multi-beam receiving processing through the beam forming function of the active antenna array. Therefore, 2-transmission and 4-reception are realized in the 1.8G frequency band and the 2.1G frequency band, the carrier aggregation function is completed, and the capacity and the peak rate of the LTE system are effectively improved on the whole.
The functional units described above, such as baseband processing unit 30, digital processing control module 726, etc., may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the functions described herein.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. An active antenna comprising a passive antenna array and an active antenna array, wherein:
the passive antenna array is used for receiving the first frequency band transmitting data transmitted by the remote radio unit and transmitting the data outwards; receiving first frequency band receiving data and transmitting the first frequency band receiving data to a radio remote unit, wherein the radio remote unit is connected with a baseband processing unit so as to realize the transmission of the first frequency band data between an active antenna and the baseband processing unit;
the active antenna array is used for receiving the second frequency band transmitting data sent by the baseband processing unit and transmitting the second frequency band transmitting data outwards; receiving the received data of the first frequency band and the second frequency band, and transmitting the received data to the baseband processing unit so that the baseband processing unit can carry out carrier aggregation on the signals of the first frequency band and the second frequency band;
each of the first frequency band and the second frequency band is provided with four receiving channels and two transmitting channels;
in the four paths of received data of the first frequency band, two paths are received through the passive antenna array, and the other two paths are received through the active antenna array; two paths of transmitting data of a first frequency band are transmitted through the passive antenna array;
the four paths of received data of the second frequency band realize multi-beam receiving processing through the beam forming function of the active antenna array; the two paths of transmission data of the second frequency band are transmitted through the active antenna array;
the passive antenna array comprises an electric tuning control interface;
for a first frequency band, adjusting a downward inclination angle through the electric regulation control interface;
and for the second frequency band, adjusting the downward inclination angle through the beam forming function of the active antenna array.
2. Active antenna according to claim 1,
the active antenna array comprises an oscillator module supporting a first frequency band and a second frequency band;
the vibrator module is a cross polarization vibrator;
the cross-polarized dipole includes a first polarized dipole and a second polarized dipole.
3. The active antenna of claim 2, wherein each of the cross-polarized elements is connected to three rf chains, wherein the three rf chains comprise a first receive chain, a second receive chain, and a transmit chain, wherein:
the first receiving link comprises a digital processing control module, a first low-noise amplifier, a first filter and a duplexer which are connected in sequence; the second receiving link comprises a digital processing control module, a second low-noise amplifier, a second filter and a duplexer which are connected in sequence; the polarized oscillator is connected with the duplexer; after being isolated by a duplexer, a receiving signal of the first receiving link and a receiving signal of the second receiving link are respectively subjected to filtering, low-noise amplification and analog-to-digital conversion and then transmitted to a baseband processing unit;
the transmitting link comprises a digital processing control module, a power amplifier and a third filter which are connected in sequence and is used for directly transmitting a transmitting signal out by a polarization oscillator after digital-to-analog conversion, frequency conversion processing, power amplification and filtering; the polarization vibrator is also connected with a third filter.
4. A carrier aggregation system, comprising an active antenna, a remote radio unit, and a baseband processing unit, wherein:
an active antenna as claimed in any one of claims 1 to 3;
the radio remote unit is used for realizing the transmission of the first frequency band data between the active antenna and the baseband processing unit;
and the baseband processing unit is used for carrying out carrier aggregation on the first frequency band signal and the second frequency band signal.
5. The carrier aggregation system of claim 4, wherein the baseband processing unit comprises a first baseband, a second baseband, and a carrier aggregation module, wherein:
the first baseband is used for sending first frequency band transmitting data to the radio remote unit; receiving first frequency band receiving data transmitted by the radio remote unit and first frequency band receiving data forwarded by the second baseband, and merging the first frequency band receiving data and the second frequency band receiving data;
the second baseband is used for sending second frequency band transmission data to the active antenna; receiving first frequency band receiving data and second frequency band receiving data transmitted by an active antenna, and forwarding the first frequency band receiving data transmitted by the active antenna to a first baseband;
and the carrier aggregation module is used for carrying out carrier aggregation on the signals of the first frequency band and the second frequency band.
6. A method for carrier aggregation, comprising:
a passive antenna array of the active antenna receives the first frequency band receiving data and transmits the data to the baseband processing unit through the radio frequency remote unit;
an active antenna array of the active antenna receives the first frequency band receiving data and the second frequency band receiving data and transmits the first frequency band receiving data and the second frequency band receiving data to the baseband processing unit;
the baseband processing unit carries out carrier aggregation on the first frequency band signal and the second frequency band signal;
each of the first frequency band and the second frequency band is provided with four receiving channels and two transmitting channels;
in the four paths of received data of the first frequency band, two paths are received through the passive antenna array, and the other two paths are received through the active antenna array; two paths of transmitting data of a first frequency band are transmitted through the passive antenna array;
the four paths of received data of the second frequency band realize multi-beam receiving processing through the beam forming function of the active antenna array; the two paths of transmission data of the second frequency band are transmitted through the active antenna array;
wherein the carrier aggregation method further comprises:
for a first frequency band, adjusting a downward inclination angle through an electric tuning control interface arranged on a passive antenna array of an active antenna;
and for the second frequency band, adjusting the downward inclination angle through the beam forming function of the active antenna array.
7. The carrier aggregation method according to claim 6, further comprising:
the baseband processing unit sends the first frequency band transmitting data to a passive antenna array of an active antenna through the radio frequency remote unit for transmitting;
and the baseband processing unit sends the second frequency band transmission data to an active antenna array of the active antenna for transmission.
8. The carrier aggregation method according to claim 6 or 7, further comprising:
the active antenna array of the active antenna realizes the receiving processing of the multi-path second frequency band receiving data through the beam forming function;
the baseband processing unit combines the first frequency band received data received by the passive antenna array and the first frequency band received data received by the active antenna array.
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| WO2019100325A1 (en) * | 2017-11-24 | 2019-05-31 | 华为技术有限公司 | Uplink signal transmission method, base station, and system |
| CN111447075B (en) * | 2019-01-17 | 2023-04-07 | 中国移动通信有限公司研究院 | Indoor distribution system, deployment method and device |
| CN110601803A (en) * | 2019-08-14 | 2019-12-20 | 洛阳智能农业装备研究院有限公司 | System chip supporting carrier aggregation technology |
| CN110708097B (en) * | 2019-10-17 | 2021-06-01 | 成都锐芯盛通电子科技有限公司 | Multi-beam antenna receiving method |
| CN111818544A (en) * | 2020-06-08 | 2020-10-23 | 中国电信集团工会上海市委员会 | Digital active system for improving coverage |
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