CN102570064A - Active antenna device and signal transmit-receive method thereof - Google Patents

Abstract

The invention provides an active antenna device and a signal transmit-receive method thereof. The active antenna device comprises digital processing modules, transmit-receive radio-frequency modules and an antenna array, and further comprises combiners, a passive antenna feeder phase-shift network and ANT (Antenna) slots, wherein the combiners are positioned between the transmit-receive radio-frequency modules and the antenna array and used for combining active antenna radio-frequency signals and RRU (Radio Remote Unit) radio-frequency signals, sending the combined signals to corresponding antenna oscillators in the antenna array, receiving signals from the antenna oscillators, performing power distribution to the signals to obtain active antenna signals and RRU signals, and respectively sending the acquired signals to both the transmit-receive radio-frequency modules and the passive antenna feeder phase-shift network; and the passive antenna feeder phase-shift network is connected with the plurality of combiners and used for performing power distribution to RRU transmitting signals received by the ANT slots to obtain a plurality of paths, respectively sending the plurality of RRU transmitting signals to the plurality of combiners, combining RRU receiving signals from the plurality of combiners and outputting the combined signals to RRUs. Owing to the multiplexed antenna array, the equipment utilization ratio is improved.

Description

Active antenna device and method for transmitting and receiving signals

technical field

The invention relates to the field of mobile communication, in particular to an active antenna device and a method for sending and receiving signals.

Background technique

In the field of civil mobile communications, the mainstream architecture adopted by the current cell network is the form of baseband processing unit (BBU) + remote radio unit (RRU). As shown in Figure 1, the baseband pool unit (BBU) completes communication with radio The remote unit (RRU) interacts with the baseband signal. The RRU completes the digital intermediate frequency processing and realizes the conversion with the radio frequency signal, and connects with the antenna array through the radio frequency jumper, and the antenna completes the signal transmission and reception work. In actual field engineering erection, this architecture usually requires the RRU and antenna array to be erected at a high place, such as the top of a cell tower. In this architecture, the RRU and the antenna array are independent physical entities, and radio frequency jumpers are used to complete signal transmission between them. The insertion loss of the jumpers consumes a lot of power consumption, which directly affects the working efficiency of the RRU.

Based on reducing operation and maintenance costs and improving the flexibility of installation, operation, and network upgrades, various wireless access network base station architectures have emerged. Active antennas are receiving a lot of attention as a form of next-generation base stations.

Active antenna is a new architecture in the form of next-generation base stations. Its field engineering setup is shown in Figure 2. From a physical perspective, it realizes the integration of RRU and antenna array. Multi-channel signals are usually provided with multiple antenna elements. , each antenna element works in parallel, and each antenna element is usually configured with two processing modules: a transceiver radio frequency module and a baseband processing module. The active antenna divides the transmitting and receiving channels into the antenna oscillator level, and the granularity is more detailed. In addition to reducing the impact of insertion loss caused by jumpers, the active antenna can realize functions such as flexible beam control and multiple-input multiple-output (MIMO) in the actual communication network through different configurations of the active antenna oscillator, making it more flexible Dynamic allocation and sharing of resources to achieve the goal of optimal network performance and lower network-wide networking costs. At the same time, the RRU is integrated into the antenna, which saves the installation area outside the antenna field and reduces the labor cost for installation and maintenance.

Considering the usage of actual commercial network base station models, there will be coexistence of BBU+RRU architecture and active antenna architecture for a long period of time in the future. When a community needs to add new active antenna equipment, the installation position of the iron tower is likely to be occupied by the previous RRU base station and passive antenna, and the antenna array is integrated inside the active antenna, if using their own antennas, it will inevitably lead to waste of resources .

Contents of the invention

Embodiments of the present invention provide an active antenna device and a method for sending and receiving signals thereof, so as to solve the problems of shortage of installation locations and waste of antenna resources during the use of the two architectures in a shared cell.

An embodiment of the present invention provides an active antenna device, including a digital processing module, a transceiver radio frequency module, and an antenna array connected in sequence, and the device also includes a combiner, a passive antenna feeder phase-shifting network, and an antenna (ANT) air interface, in:

The combiner is located between the transceiver radio frequency module and the antenna array, and is used to combine the active antenna radio frequency signal from the transceiver radio frequency module and the radio frequency remote unit ( RRU) radio frequency signals are combined, and the combined signal is provided to the corresponding antenna element in the antenna array; and after receiving the signal from the antenna element, the signal power is divided into the active antenna and the RRU signal. Send to the transceiver radio frequency module and the passive antenna feeder phase-shifting network respectively;

The passive antenna feeder phase-shifting network is connected to a plurality of the combiners, and is used to divide the RRU transmission signal received through the ANT air interface into multiple paths and send them to the multiple combiners respectively; and The signals received by the RRUs from the multiple combiners are combined and then output to the RRUs through the ANT air interface.

Preferably, the passive antenna feed phase-shifting network is also used to implement beamforming on the RRU side.

Preferably, the device further includes an electrical adjustment port (AISG); the passive antenna feeder phase-shifting network is specifically used to adjust the downtilt angle of the beam on the RRU side through the AISG.

Preferably, the passive antenna feeder phase-shifting network includes a passive antenna feeder network and a phase-shifting network, and the passive antenna feeder network adopts Wilkinson (Wilkinson) and 1/4 wavelength conversion principle, through a microstrip line A passive antenna feeder network implemented with a stripline; the passive antenna feeder network is used to control amplitude and phase weighting by changing the line width and line length respectively, so as to realize beamforming on the RRU side; the phase shifting network, Used to achieve phase changes by changing the physical length or dielectric constant of a line.

Preferably, the combiner is a combiner implemented in the form of a microstrip printed circuit board or a cavity; and/or, the antenna element is in the form of a bandwidth, at least supporting the active antenna signal frequency band and the RRU signal frequency band antenna array.

Preferably, the device further includes a power division network; the power division network is located between the combiner and the antenna element, and the power division network is connected to a plurality of antenna elements for changing the line width The sum line length provides amplitude and phase weighting for multiple antenna elements corresponding to the power division network.

Preferably, the device also includes a plurality of optical fiber converter (OPT) ports;

The digital processing module is configured to receive an active antenna signal sent by a baseband processing unit (BBU) through the OPT port, and send an active antenna signal after digital down-conversion processing to the BBU through the OPT port.

Preferably, the BBU is located outside the active antenna device or inside the active antenna device.

Preferably, the BBU is simultaneously connected to the active antenna device and the RRU through a plurality of OPT ports to form a chain network, a ring network or a star network; or, the BBU is connected to each other through a plurality of OPT ports. It is connected with the active antenna device and the RRU.

The embodiment of the present invention also provides a method for transmitting and receiving signals of an active antenna device, the method comprising:

The active antenna device receives the active antenna signal through the optical fiber converter (OPT) port, and simultaneously receives the radio frequency remote unit (RRU) radio frequency signal through the ANT air interface; the active antenna signal is processed into an active antenna radio frequency signal, and the The RRU radio frequency signal power is divided into multiple channels;

The active antenna device respectively combines the radio frequency signal of the active antenna and each RRU radio frequency signal after power division, and then outputs it.

Preferably, the method also includes:

The active antenna device receives a signal, and divides the signal into an active antenna signal and an RRU signal;

The active antenna device transmits the active antenna signal through the OPT port, and transmits the RRU signal to the RRU through the ANT air interface.

The above-mentioned active antenna device provides an external interface to connect with the RRU to realize the multiplexing of the antenna array inside the device, thereby facilitating the actual network deployment, improving the utilization rate of the equipment, and reducing the cost.

Description of drawings

Figure 1 is the erection diagram of the existing BBU+RRU architecture field engineering;

Fig. 2 is the erection diagram of the existing active antenna field engineering;

Fig. 3 is a common erection diagram of the active antenna device of the present invention and the BBU+RRU architecture field engineering;

4 is a schematic diagram of an external interface provided by the active antenna device of the present invention;

5 is a schematic structural diagram of Embodiment 1 of the active antenna device of the present invention;

6 is a schematic structural diagram of Embodiment 2 of the active antenna device of the present invention;

7 is a schematic structural diagram of Embodiment 3 of the active antenna device of the present invention;

Fig. 8a is the first application scenario of the joint networking of the active antenna device and the BBU and RRU of the present invention;

Fig. 8b is the second application scenario of the joint networking of the active antenna device and the BBU and RRU of the present invention;

Fig. 8c is the third application scenario of joint networking between the active antenna device and the BBU and RRU of the present invention;

Fig. 8d is the fourth application scenario of joint networking of the active antenna device, BBU and RRU of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

The embodiment of the present invention provides an active antenna device. Compared with the existing active antenna device, the device provides multiple external interfaces to connect with the radio frequency output port of the RRU, so as to achieve the purpose of sharing the antenna array between the device and the RRU. In addition, the device provides M optical fiber converter (OPT) ports to realize the joint networking application with the current BBU and RRU.

The erection diagram of the field engineering of the active antenna device provided by the embodiment of the present invention is shown in Figure 3. The active part of the device realizes the function of the active antenna itself (connecting with the BBU to realize the uplink and downlink digital signal processing function, and the wireless transceiver function of the radio frequency signal , beamforming function of uplink and downlink signals, independent adjustment of downtilt angle of uplink and downlink antennas, etc.) to meet the function of community network business expansion; in addition, this device provides an external radio frequency interface to connect with RRU to ensure the normal operation of the original network.

Specifically, the active antenna device includes a sequentially connected digital processing module, a transceiver radio frequency module, and an antenna array, and also includes a combiner, a passive antenna feed phase-shifting network, and an ANT air interface, wherein:

The combiner is located between the transceiver radio frequency module and the antenna array, and is used to combine the active antenna radio frequency signal from the transceiver radio frequency module and the radio frequency remote unit ( RRU) radio frequency signals are combined, and the combined signal is provided to the corresponding antenna element in the antenna array; and after receiving the signal from the antenna element, the signal power is divided into the active antenna and the RRU signal. Send to the transceiver radio frequency module and the passive antenna feeder phase-shifting network respectively;

The passive antenna feeder phase-shifting network is connected to a plurality of combiners, and is used to divide the RRU transmission signal received through the antenna (ANT) air interface into multiple channels and send them to the multiple combiners respectively and combining the RRU received signals from the plurality of combiners and then outputting them to the RRU through the ANT air interface.

As shown in Figure 4, it is a schematic diagram of the external interface provided by the active antenna device of the present invention, wherein ANT1-ANT N is connected to the RRU air interface (N depends on the number of built-in antenna arrays) to realize the interaction of radio frequency signals; in addition, the The device can also include AISG, which is the electrical adjustment port of the RRU passive antenna array, and controls functions such as downtilt angle adjustment of the RRU antenna array; further, the optical fiber converter (OPT) 1-OPTM port is the optical fiber connection of the device itself Interface, complete baseband signal interaction with BBU, RRU or other active antennas, and realize hybrid networking function.

As shown in FIG. 5 , it is a schematic structural diagram of Embodiment 1 of the active antenna device of the present invention. The device includes a digital processing module 11, a transceiver radio frequency module 12, an antenna array 13, a combiner 14, and a passive antenna feeder phase-shifting network 15. . One antenna element of an active antenna corresponds to a set of sending and receiving links, and the corresponding relationship between the number of antenna elements and the channels determines the number of sending and receiving links.

The above-mentioned digital processing module 11, when downlinking, converts the signal sent by the baseband processing unit into parallel/serial conversion into an IQ digital transmission signal, and provides it to the transceiver radio frequency module; The digital received signal is digitally processed. The digital processing module can be subdivided into M digital processing modules corresponding to each antenna element, and each module completes the digital processing task of its own sending and receiving link. In addition, the digital processing module also completes amplitude and phase calibration, beamforming, downtilt adjustment, sub-carrier or sub-mode downtilt and other functions through related algorithms.

The above-mentioned transceiver radio frequency modules 12 are respectively corresponding to each antenna element. Each module can be subdivided into transmit, receive, and feedback channels. The transmission channel up-converts the intermediate frequency signal provided by the digital processing module to a radio frequency signal through an up-conversion modulator, and further amplifies the transmission signal through a multi-stage amplifier. The receiving channel receives the small radio frequency signal received from the antenna array, amplifies it through devices such as a low noise amplifier (LNA), and converts it into an intermediate frequency signal through a down-conversion mixer and provides it to the digital processing module. The feedback channel completes two functions: (1) Coupling relevant signals from the output of the transmitting power amplifier (PA) and providing them to the digital processing module for digital predistortion processing (DPD) to optimize the adjacent channel leakage suppression ratio of the transmitting link; (2) ) as a calibration channel to realize the amplitude and phase calibration of the transmitting and receiving channels.

The above-mentioned antenna array 13 is composed of antenna elements to realize the conversion of electromagnetic wave signals and radio frequency signals, and complete the space radiation and reception functions of transmitting and receiving signals.

There are M total of the above-mentioned combiners 14 . In the downlink, it completes the combination of the active antenna radio frequency signal and the RRU radio frequency signal, and provides it to each antenna oscillator; in the uplink, it receives the small signal received by the antenna oscillator, and divides the power into two channels: the active antenna and the RRU Signal.

The passive antenna feeder phase-shifting network 15 is composed of two parts: a passive antenna feeder network and a phase-shifting network. The passive antenna feeder network completes the power division of the RRU transmit signal and the combination function of the RRU receive signal, and assigns a certain amplitude and phase difference to each channel to realize the antenna beamforming on the RRU side. The phase shifting network is controlled by the AISG, and the phase of each channel is changed through the motor drive to adjust the downtilt angle of the RRU side beam.

If the device shown in Figure 5 is used as a subsystem, the whole machine can also realize the integration of N subsystems, so that the external interfaces of the whole machine and the RRU air interface are ANT1-ANTN, a total of N.

The device shown in FIG. 5 realizes the power division and combination of the active antenna signal and the RRU signal through the combiner, and achieves the purpose of multiplexing the antenna array. The following is a further description of the specific functions of this device from the perspective of signal direction:

When downlinking, the device receives the active antenna IQ digital signal at the OPT port, and at the same time receives the RF analog downlink signal of the external RRU at the ANT1 port. The active antenna IQ digital signal is converted into an IQ analog signal by the digital processing module 11, and is up-converted by the transceiver radio frequency module 12 into an active antenna radio frequency signal; the RRU radio frequency signal is divided into M signals by the passive antenna phase-shifting network 15. The combiner combines the two signals and provides them to the antenna element to realize energy radiation.

When uplinking, the antenna oscillator of this device receives small spatial signals, and divides the active antenna radio frequency signal and the RRU radio frequency signal into two channels through a combiner. The active antenna radio frequency signal is converted from the radio frequency signal to IQ analog signal and IQ digital signal through the transceiver radio frequency module 12 and the digital processing module 11, and is provided to the BBU for processing; each radio frequency signal of the RRU is realized by the passive antenna feeder phase-shifting network 15 Combined, and send the combined radio frequency analog signal to the RRU to complete the uplink signal processing function.

It should be explained that the spatial radiation and reception of each signal requires beamforming and downtilt angle adjustment, and the beamforming of active antenna signals and RRU signals is realized by different methods. For the active antenna part, the whole machine uses a feedback link or a dedicated calibration channel to collect the amplitude and phase information of each channel for transmission and reception, and the digital processing unit performs related processing to obtain the amplitude, phase difference and delay information of each channel, and finally the digital processing The unit gives the correction factor of each channel to realize beamforming and downtilt adjustment. In the RRU part, the passive antenna feeder network assigns different amplitudes and phase differences to each channel through physical wiring to achieve beamforming, and the AISG ESC adjusts the phase of each channel mechanically through the phase-shifting network to complete the downtilt adjustment.

The passive antenna feeder network can adopt Wilkinson (Wilkinson), 1/4 wavelength conversion and other principles, and realize it in the form of microstrip line and stripline, and further change the line width and line length to control the amplitude and phase performance respectively.

The phase shifting network mainly realizes the phase change by changing the physical length or the dielectric constant of the line.

The combiner can be implemented in the form of a microstrip printed circuit board or a cavity, and the two combined signals are separated from each other in frequency. In order to improve the efficiency, the insertion loss of the combiner is required to be as small as possible, and a certain suppression and isolation index should be maintained between the ports to prevent mutual interference between the two signals.

The antenna element is in the form of broadband, and at least needs to support the working frequency bands of the active and passive parts.

As shown in Figure 6, it is a schematic structural diagram of Embodiment 2 of the active antenna device of the present invention. Compared with the device shown in Figure 5, Figure 6 additionally adds a power dividing network 16 to realize the communication between a transceiver radio frequency module and K antenna elements Connection (K usually takes 2 or 3). The power dividing network 16 can be realized physically by using Wilkinson or other types of microstrip printed circuit board power dividers, by changing the line width and line length to provide fixed amplitude and phase weighting for each dipole, so that the active antenna side and the Beamforming at the RRU side provides another approach to physical compensation.

The introduction of the power dividing network 16 reduces the number of transceiver channels on the active antenna side to some extent, thus effectively reducing the cost and power consumption.

On the basis of Figure 5 and Figure 6, the active antenna can also realize the integration of BBU, and its internal structure is shown in Figure 7. Removing the power dividing network 16 realizes the integration of FIG. 5 and the BBU.

The above-mentioned active antenna device can also provide M OPT external interfaces (M≥2), through which the joint networking with the existing BBU and RRU can be realized. The specific scenarios are described as follows:

Hybrid chain type: a chain type network in which one BBU is simultaneously cascaded with K active antenna devices (hereinafter referred to as AAS) of the present invention and L RRUs can be realized. Where K+L=Y, and the positions and numbers of the AAS and RRU in the chain network can be changed flexibly, as shown in Figure 8a.

Hybrid ring type: It can realize a ring type network in which a BBU is cascaded with K AASs and L RRUs at the same time, and the Yth base station is connected with the BBU to realize a loop. Where K+L=Y, and the positions and numbers of the AAS and RRU in the chain network can be changed flexibly, as shown in Figure 8b.

Hybrid star: The same BBU can be connected to K AAS and L RRU at the same time. Where K+L=Y, and the configuration ratio of AAS and RRU in the star network can also be flexibly configured, as shown in FIG. 8c.

Independent type: It can realize independent networking in which K AASs and L RRUs are respectively connected to their respective BBUs, as shown in Figure 8d.

In the above application scenarios, while realizing the joint networking of the RRU and the device of the present invention, the air interface of the RRU can be connected with the adjacent active antenna device of the present invention to realize the multiplexing of the built-in antenna array.

The active antenna device of the present invention can also be applied in the cooperative radio access (CRAN) framework of the cloud computing framework.

The above-mentioned active antenna device is connected to the RRU through an external interface to realize the multiplexing of the antenna array inside the device, so as to facilitate the actual network deployment, improve the utilization rate of the equipment, and reduce the cost.

The embodiment of the present invention also provides a method for transmitting and receiving signals of an active antenna device, the method is applicable to the devices shown in Figures 5-7, and is also applicable to the architecture shown in Figures 8a-8d, the method includes:

Step 11, the active antenna device receives the active antenna signal through the optical fiber converter (OPT) port, and simultaneously receives the radio frequency remote unit (RRU) radio frequency signal through the ANT air interface; the active antenna signal is processed into an active antenna radio frequency signal , dividing the RRU radio frequency signal into multiple paths;

Step 12: The active antenna device combines the radio frequency signal of the active antenna with the power-divided radio frequency signal of each RRU, and then outputs it.

The above-mentioned process is the process of sending signals by the active antenna device of the present invention. In addition, the process of receiving signals by the active antenna device is as follows:

Step 21, the active antenna device receives a signal, and divides the signal into an active antenna signal and an RRU signal;

Step 22. The active antenna device transmits the active antenna signal through the OPT port, and transmits the RRU signal to the RRU through the ANT air interface.

The active antenna device provided by the invention can multiplex the antenna array to send and receive signals, thereby improving the equipment utilization rate and reducing the cost.

Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing related hardware through a program, and the above program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk, and the like. Optionally, all or part of the steps in the foregoing embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any specific combination of hardware and software.

The above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them, and the present invention is described in detail with reference to preferred embodiments. Those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all should be covered by the claims of the present invention.

Claims (11)

1. active antenna device comprises the digital signal processing module, transmitting-receiving radio-frequency module and the aerial array that connect successively, it is characterized in that, this device comprises that also mixer, passive antenna feeder phase-shift network and antenna (ANT) eat dishes without rice or wine, wherein:

Said mixer; Between said transmitting-receiving radio-frequency module and aerial array; Be used for closing the road, the signal that closes behind the road is offered corresponding antenna oscillator in the said aerial array from the active antenna radiofrequency signal of said transmitting-receiving radio-frequency module with from Remote Radio Unit (RRU) radiofrequency signal of said passive antenna feeder phase-shift network; And receive signal from said antenna oscillator, after being divided into active antenna and RRU signal, said signal merit is sent to said transmitting-receiving radio-frequency module and said passive antenna feeder phase-shift network respectively;

Said passive antenna feeder phase-shift network links to each other with a plurality of said mixers, is used for the RRU that eats dishes without rice or wine to receive through said ANT transmitted being sent to said a plurality of mixer respectively after merit is divided into multichannel; And eat dishes without rice or wine to export to RRU through said ANT after will closing the road from the RRU reception signal of said a plurality of mixers.

2. device according to claim 1 is characterized in that:

Said passive antenna feeder phase-shift network also is used to realize the wave beam forming of RRU side.

3. device according to claim 2 is characterized in that, said device also comprises electricity accent mouthful (AISG);

Said passive antenna feeder phase-shift network specifically is used for realizing through this AISG the angle of declination adjustment of the wave beam of RRU side.

4. device according to claim 2 is characterized in that:

Said passive antenna feeder phase-shift network comprises passive antenna feeder network and phase-shift network, and said passive antenna feeder network is for adopting Wilkinson (Wilkinson) and 1/4 wavelength conversion principle, through the passive antenna feeder network of microstrip line and strip line realization;

Said passive antenna feeder network is used for realizing the wave beam forming of RRU side through changing live width and line length span of control limit of control and phase weighting respectively;

Said phase-shift network is used for realizing phase change through the physical length or the dielectric constant that change circuit.

5. device according to claim 1 is characterized in that:

The mixer of said mixer for adopting little band printed circuit board or cavity form to realize; And/or

Said antenna a period of time is supported antenna a period of time of active antenna signal frequency range and RRU signal frequency range at least for adopting bandwidth-version.

6. according to the described device of the arbitrary claim of claim 1-5, it is characterized in that this device also comprises power division network;

Said power division network, between said mixer and said antenna oscillator, and said power division network links to each other with a plurality of antenna a period of time, and being used for provides amplitude and phase weighting through changing live width and line length for a plurality of antenna oscillators corresponding with this power division network.

7. device according to claim 6 is characterized in that, this device also comprises a plurality of optic fiber converters (OPT) mouth;

Said digital signal processing module is used for receiving the active antenna signal that baseband processing unit (BBU) sends through said OPT mouth, and sends the active antenna signal that carries out after Digital Down Convert is handled to said BBU through said OPT mouth.

8. device according to claim 7 is characterized in that:

It is inner that said BBU is positioned at the outside or said active antenna device of said active antenna device.

9. device according to claim 8 is characterized in that:

Said BBU links to each other with RRU with said active antenna device through a plurality of OPT mouths simultaneously, forms chain networking, ring-shaped network or star-like networking; Perhaps

Said BBU links to each other with RRU with said active antenna device respectively through a plurality of OPT mouths.

10. the method for an active antenna device receiving and transmitting signal is characterized in that, this method comprises:

The active antenna device is through optic fiber converter (OPT) mouthful reception active antenna signal, simultaneously through antenna (ANT) received RF extension unit (RRU) radiofrequency signal of eating dishes without rice or wine; With said active antenna signal processing is the active antenna radiofrequency signal, and said RRU radiofrequency signal merit is divided into multichannel;

Said active antenna device is exported after respectively the every road RRU radiofrequency signal behind said active antenna radiofrequency signal and the merit branch being closed the road.

11. method according to claim 10 is characterized in that, this method also comprises:

Said active antenna device receives signal, and said signal merit is divided into active antenna signal and RRU signal;

Said active antenna device is defeated through said OPT oral instructions with said active antenna signal, and said RRU signal is eated dishes without rice or wine to be transferred to said RRU through said ANT.

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