CN103916877A - Signal processing method and radio remote unit (RRU) - Google Patents

Abstract

The embodiment of the present invention relates to the field of communication technology, and in particular to a signal processing method and a radio remote unit, which are used to solve the problem in the prior art that it is difficult to establish mobile communications corresponding to multiple standards. Centralized management and unified planning of the network. The signal processing method provided by the embodiment of the present invention includes: the remote radio unit RRU connected to each baseband processing unit BBU of multiple standards converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value ; The RRU determines the radio frequency signal according to the converted baseband signal, and transmits the radio frequency signal through at least one antenna. The embodiment of the present invention realizes the adoption of multi-standard BBUs and one RRU to form a network, which reduces the difficulty of centralized management and unified planning of the established network.

Description

A signal processing method and remote radio unit

technical field

The invention relates to the technical field of communication, in particular to a signal processing method and a remote radio unit.

Background technique

The networking of BBU (Baseband Processing Unit) and RRU (Remote Radio Unit) is also called distributed base station. Among them, the networking principle of BBU and RRU is to separate the baseband part and radio frequency part of the traditional macro base station into two devices, BBU and RRU respectively. The BBU is responsible for the processing and transmission of the baseband signal, and the RRU is responsible for converting the baseband signal from the BBU into The radio frequency signal is transmitted from the antenna, and the radio frequency signal received from the antenna is converted into a baseband signal, and sent to the BBU, and the BBU and the RRU are connected through an optical fiber. The networking mode of BBU and RRU has the characteristics of fast, economical, and higher resource utilization than macro base stations, and has been widely used in the construction of mobile communication networks.

In the construction of the current mobile communication network, a network mode of one standard BBU and one RRU is adopted, as shown in Figure 1 and Figure 2. In Figure 1, a single-standard computer room (that is, a computer room equipped with a standard BBU) through One fiber is connected to one RRU; as shown in Figure 2, for each standard BBU in a multi-standard computer room (that is, a computer room equipped with multiple standard BBUs), it is connected to one RRU through one fiber.

Since the current mobile communication network construction adopts the networking mode of one standard BBU and one RRU, it needs to be networked separately for each standard. Corresponding BBU builds a network, it is difficult to perform centralized management and unified planning on the established network, and the cost of operating and maintaining the network is very high, which hinders the development of mobile communication networks to a certain extent.

To sum up, since the current mobile communication network construction adopts the networking method of one standard BBU and one RRU, it is difficult to perform centralized management and unified planning on the established network for multiple standards.

Contents of the invention

The embodiment of the present invention provides a signal processing method and remote radio unit, which are used to solve the problem in the prior art that it is difficult to centrally manage and manage mobile communication networks corresponding to multiple standards in the prior art. The problem of unified planning.

A signal processing method provided by an embodiment of the present invention includes:

The remote radio unit RRU connected to each baseband processing unit BBU of multiple standards converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value;

The RRU determines the radio frequency signal according to the converted baseband signal, and transmits the radio frequency signal through at least one antenna.

A signal processing method provided by an embodiment of the present invention includes:

The radio remote unit RRU connected to each baseband processing unit BBU of multiple standards converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value;

For each type of BBU connected to the RRU, the RRU converts the converted baseband signal sampling rate value into the corresponding baseband signal sampling rate value of the BBU, and sends the converted baseband signal to the BBU.

A remote radio unit RRU provided by the present invention includes:

The first conversion module is used to convert the received sampling rate value of the baseband signal from each baseband processing unit BBU into a set sampling rate value;

The first processing module is configured to determine a radio frequency signal according to the converted baseband signal, and transmit the radio frequency signal through at least one antenna.

A remote radio unit RRU provided by the present invention includes:

The second conversion module is used to convert the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value;

The second processing module is used for converting the sampling rate value of the converted baseband signal into the sampling rate value of the baseband signal corresponding to the BBU for each standard BBU connected to the RRU, and sending the converted baseband signal to the BBU.

In the embodiment of the present invention, the RRU connected to the BBU of multiple formats converts the received sampling rate value of the baseband signal from the BBU into a set sampling rate value; the RRU determines the radio frequency signal according to the converted baseband signal, and Transmitting a radio frequency signal through at least one antenna; and the remote radio unit RRU connected to each baseband processing unit BBU of multiple formats converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value; For each standard BBU connected to the RRU, the RRU converts the sample rate value of the converted baseband signal into the sample rate value of the baseband signal corresponding to the BBU, and sends the converted baseband signal to the BBU. Due to different standard BBUs The sampling rate value of the corresponding baseband signal is different. For the downlink process, the RRU converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value, and determines the radio frequency signal corresponding to the converted baseband signal. Through at least An antenna is sent out. For the uplink process, the RRU converts the radio frequency signal received from the antenna into a baseband signal whose sampling rate is the set sampling rate value. For each standard BBU connected to the RRU, the converted The sampling rate value of the baseband signal is converted into the sampling rate value of the baseband signal corresponding to the BBU, and sent to the BBU, so that the RRU can process the baseband signal corresponding to the BBU of various standards connected to itself, and then can adopt multiple BBUs of different standards and one RRU are used to form a network, which reduces the difficulty of centralized management and unified planning of the established network.

Description of drawings

FIG. 1 is a schematic diagram of a network of a single-mode computer room and a single-mode RRU in the background technology;

FIG. 2 is a schematic diagram of networking between a multi-mode computer room and a single-mode RRU in the background technology;

3 is a schematic flowchart of a method for processing a downlink signal by an RRU according to an embodiment of the present invention;

4 is a schematic diagram of a multi-standard BBU and RRU networking mode according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an RRU principle according to an embodiment of the present invention;

6 is a schematic flowchart of a method for processing an uplink signal by an RRU according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an RRU according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an RRU according to an embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the RRU connected to the BBU of multiple formats converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value; the RRU determines the radio frequency signal according to the converted baseband signal, and passes at least An antenna transmits a radio frequency signal; and the radio remote unit RRU connected to each baseband processing unit BBU of various standards converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value; for connecting with the RRU For the BBU of each standard, the RRU converts the sampling rate value of the converted baseband signal into the sampling rate value of the baseband signal corresponding to the BBU, and sends the converted baseband signal to the BBU. The sampling rate value of the baseband signal is different. For the downlink process, the RRU converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value, determines the radio frequency signal corresponding to the converted baseband signal, and passes through at least one antenna For the uplink process, the RRU converts the radio frequency signal received from the antenna into a baseband signal whose sampling rate is the set sampling rate value, and converts the converted baseband signal to each standard BBU connected to the RRU. The sampling rate value of the signal is converted into the sampling rate value of the baseband signal corresponding to the BBU, and sent to the BBU, so that the RRU can process the baseband signals corresponding to the BBU of various formats connected to itself, and then can adopt multiple formats The networking of the BBU and one RRU reduces the difficulty of centralized management and unified planning of the established network.

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 3 , the method for RRU to process downlink signals in the embodiment of the present invention includes the following steps:

Step 301, the RRU connected to each BBU of multiple formats converts the received sampling rate value of the baseband signal from the BBU into a set sampling rate value;

Step 302, the RRU determines a radio frequency signal according to the converted baseband signal, and transmits the radio frequency signal through at least one antenna.

Preferably, in step 301, the RRU receives the baseband signal from the BBU, including:

For a BBU, the RRU receives the baseband signal from the BBU through the optical port corresponding to the BBU;

One standard of one BBU corresponds to one optical port, and one optical port corresponds to one BBU.

During implementation, the BBU may be a single-standard BBU or a multi-standard BBU, which will be introduced separately below.

Case 1: The BBU is a single-mode BBU.

For a single-standard BBU, connect a cpri (common public radio interface) of the BBU and an optical port of the RRU through an optical fiber to transmit the baseband signal output by the BBU to the RRU. At this time, the optical port connected by the optical fiber is the optical port corresponding to the BBU;

Wherein, one BBU corresponds to one optical port, and one optical port corresponds to one BBU.

When the RRU is connected to N single-standard BBUs through N (N is a positive integer) optical fibers, the RRU receives the baseband signals corresponding to the N single-standard BBUs through the optical ports corresponding to the N single-standard BBUs.

Case 2: The BBU is a multi-mode BBU.

For a multi-standard BBU, if there are M kinds of standards for the BBU, for one standard of the BBU, connect a cpri (common public radio interface) corresponding to the standard and an optical port of the RRU through an optical fiber to realize the The baseband signal corresponding to the standard output by the BBU is transmitted to the RRU. At this time, the optical port connected to the optical fiber is the optical port corresponding to the standard of the BBU; that is, a BBU of M standards transmits the BBU through M optical fibers For the baseband signals corresponding to the M standards, the RRU receives the baseband signals from the BBU through the M optical ports corresponding to the M standards.

As shown in Figure 4, the BBU is a dual-standard BBU that supports GSM (Global System for Mobile Communications) and WCDMA (Wideband Code Division Multiple Access) standards. Optical fiber 1 transmits the baseband signal corresponding to the GSM standard output by cpri0 to the RRU. The RRU receives the baseband signal corresponding to the GSM standard through optical port 1; the optical fiber 2 transmits the baseband signal corresponding to the WCDMA standard output by cpri1 to the RRU, and the RRU receives the baseband signal corresponding to the WCDMA standard through optical port 2.

Preferably, for a multi-standard BBU, one standard of the BBU corresponds to one optical port, then the baseband signal corresponding to one standard of the BBU can be received from one optical port, or can be received from one optical port in different time periods Receive the baseband signals corresponding to the multiple standards of the BBU.

For example, similarly, the BBU is a dual-standard BBU, which can transmit the baseband signal corresponding to the GSM standard through optical fiber 1 in the first time period, and the RRU receives the baseband signal corresponding to the GSM standard through optical port 1; During the time period, the baseband signal corresponding to the WCDMA standard is transmitted through the optical fiber 1, and the RRU receives the baseband signal corresponding to the WCDMA standard through the optical port 1; that is, the baseband signal corresponding to the GSM standard of the BBU is received from the optical port 1 in different time periods The baseband signal corresponding to the WCDMA standard.

One standard of one BBU corresponds to one optical port, and one optical port corresponds to one BBU.

It should be noted that the above is only an introduction to the implementation of one BBU, and the RRU receives the baseband signal from the BBU. For the situation where there are multiple BBUs, the implementation of each BBU in the multiple BBUs is the same as the above for a BBU. , the implementation of the RRU receiving the baseband signal from the BBU is similar and will not be repeated here.

During implementation, the sampling rate values of the baseband signals transmitted by the BBUs of different standards are different.

In implementation, in step 301, the RRU may receive one baseband signal or multiple baseband signals.

Among them, the implementation of the single-standard computer room and the multi-standard computer room (the computer room supports multiple standards) is similar to the implementation of the single-standard and multi-standard BBU, and will not be repeated here.

Preferably, in step 301, before the RRU converts the received sampling rate value of the baseband signal from the BBU into a set sampling rate value, it also includes:

The RRU determines the set sampling rate value according to the clock frequency value determined by the clock distributor.

Wherein, the numerical magnitude of the set sampling rate value is equal to the numerical magnitude of the clock frequency value determined by the clock distributor.

Preferably, in step 301, the RRU converts the received sampling rate value of the baseband signal from the BBU into a set sampling rate value by way of interpolation. When the signal is downlink, the RRU increases the sampling rate of the baseband signal through interpolation, so that the sampling rate value of the baseband signal received from the BBU increases to the set sampling rate value.

During implementation, other methods capable of converting the sampling rate values of the baseband signals corresponding to different standard BBUs into the set sampling rate values are equally applicable to the present invention.

Preferably, in step 301, when the RRU receives a plurality of baseband signals with different sampling rate values in the same time period, the baseband signals with different sampling rate values can be sequentially converted into a set sampling rate value, or simultaneously Converting the sampling rate values of at least two baseband signals into a set sampling rate value.

In the following, the RRU will receive the first baseband signal corresponding to the BBU of the first standard connected to itself and the second baseband signal corresponding to the BBU of the second standard in the same time period as an example. The implementation manners of the example are similar, and will not be repeated here.

As shown in Figure 5, the first processing unit includes a digital intermediate frequency module, a frequency conversion module, a power amplifier module, and a filter module. One branch of the first processing unit, FPGA2 and DAC2 connected in series constitutes the second first processing unit, wherein the structure of the first first processing unit and the second first processing unit are the same.

RRU receives the first baseband signal through optical port 1, and receives the second baseband signal through optical port 2; RRU can use the up-conversion DUC corresponding to FPGA1 to convert the sampling rate value of the first baseband signal into the set sampling rate value, using FPGA2 The corresponding DUC converts the sampling rate value of the second baseband signal into the set sampling rate value, so as to simultaneously convert the sampling rate values of the two baseband signals into the set sampling rate value; the DUC corresponding to FPGA1 can also sequentially convert the The sampling rate values of the first baseband signal and the second baseband signal are converted into a set sampling rate value.

In the implementation, for the case of sequentially converting baseband signals with different sampling rate values into the set sampling rate value, and for the case where there are multiple baseband signals with the set sampling rate value, whether to synthesize the multiple The baseband signal can be set as required. For example, the RRU can separately determine the radio frequency signal corresponding to each baseband signal after conversion; after at least two baseband signals of all converted baseband signals can be synthesized into one baseband signal, determine the The radio frequency signal corresponding to one baseband signal, and the radio frequency signal corresponding to each baseband signal except the one baseband signal; it is also possible to combine all converted baseband signals into one baseband signal in pairs, and determine the corresponding baseband signal of each synthesized baseband signal RF signals, etc.

Wherein, if at least two baseband signals among multiple baseband signals synthesize one baseband signal, the at least two baseband signals simultaneously occupy a certain first processing unit in the same period of time (in FIG. 5, the at least two baseband signals Occupy the first processing unit of the first channel or the first processing unit of the second channel at the same time); if multiple baseband signals do not undergo synthesis processing, each baseband signal in the multiple baseband signals will be in different time periods Occupies the first processing unit of a certain channel.

Preferably, the RRU synthesizes all converted baseband signals into one baseband signal; then step 302, the RRU determines the radio frequency signal according to the converted baseband signal, including:

According to the synthesized baseband signal, a radio frequency signal corresponding to the synthesized baseband signal is determined.

Preferably, the RRU synthesizes at least two baseband signals of all converted baseband signals into one baseband signal, then in step 302, the RRU determines the radio frequency signal according to the converted baseband signal, including:

Determine a radio frequency signal corresponding to the synthesized baseband signal according to the synthesized baseband signal; and determine a radio frequency signal corresponding to the uncombined baseband signal according to the uncombined baseband signal.

During implementation, the implementation of other manners for determining the synthesized and/or uncombined multiple baseband signals for the RRU is similar to the implementation of the embodiment of the present invention, and will not be repeated here.

Next, the RRU will receive the first baseband signal corresponding to the first standard BBU connected to itself and the second baseband signal corresponding to the second standard BBU within the same time period, and use the DUC corresponding to FPGA1 to obtain the converted first baseband signal The second baseband signal and the conversion of the converted first baseband signal and the second baseband signal are not combined into one signal as an example. The implementation of other cases is similar to the implementation of the embodiment of the present invention, and will not be repeated here.

As shown in Figure 5, the RRU receives the first baseband signal through optical port 1 and the second baseband signal through optical port 2; the DUC corresponding to FPGA1 is used to sequentially convert the sampling rate values of the first and second baseband signals into the set sampling rate rate value.

Preferably, the system module of FPGA1 can receive the first baseband signal through the optical port 1 and receive the second baseband signal through the optical port 2 .

Preferably, the system module of FPGA1 can determine the set sampling rate value according to the clock frequency value determined by the clock distributor.

The DUC of FPGA1 realizes the conversion of the converted first baseband signal from "complex" baseband signal to "real" bandpass signal, and filters the first baseband signal to convert it into a higher sampling rate, so as to modulate it to NCO (Numerical Control Oscillator) intermediate frequency carrier frequency (that is, convert the sampling rate value of the first baseband signal into the first sampling rate value); FPGA1's CFR (crest factor attenuation) realizes reducing the intermediate frequency signal before PA (power amplification) (that is, modulated to The PAR (peak-to-average ratio) of the first baseband signal at the intermediate frequency carrier frequency) ensures the linearity of the PA output, reduces out-of-band radiation, and improves PA efficiency; the digital predistortion DPD of FPGA1 implements predistortion processing on the intermediate frequency signal and corrects the PA Non-linear characteristics, improve the output efficiency of PA; input the pre-distorted intermediate frequency signal to DAC1;

Among them, the digital intermediate frequency module includes FPGA1 and DAC1;

A frequency conversion module, which is used to convert the intermediate frequency signal output by DAC1 into a radio frequency signal through frequency mixing;

Preferably, as shown in Figure 5, the frequency conversion module may include an IQ Modulator (IQ modulator, intelligent regulator), which is used to filter the intermediate frequency signal output by the DAC1 (i.e. the intermediate frequency signal output by the intermediate frequency filter IF Filter1 to the DAC1 After performing intermediate frequency filtering), it is mixed with the signal output by the first radio frequency phase-locked source; ATT (attenuator, attenuator) is used to control the gain of the signal output by the mixing.

The power amplifier module is used to amplify the radio frequency signal;

A filtering module, which performs filtering processing on the amplified radio frequency signal;

The filtered radio frequency signal is output from the antenna.

Wherein, the processing process of the converted second baseband signal is similar to the embodiment of the processing process of the converted first baseband signal, except that the converted first baseband signal and the converted second baseband signal are processed in different time periods. Signal.

Preferably, the radio frequency signal corresponding to the first baseband signal and the radio frequency signal corresponding to the second baseband signal may be transmitted from the same antenna, or may be transmitted from different antennas.

Preferably, for the case of synthesizing the converted first baseband signal and the second baseband signal into one signal, the DUC of FPGA1 needs to convert the sampling rate values of the first baseband signal and the second baseband signal into the first sampling rate respectively After the value, the converted first baseband signal and the second baseband signal are synthesized into one signal, and the combined signal is input to the CFR of FPGA1.

Preferably, as shown in FIG. 6, the embodiment of the present invention provides a method for processing an uplink signal, including:

Step 601, the RRU connected to each BBU of multiple standards converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value;

Step 602, for each type of BBU connected to the RRU, the RRU converts the sample rate value of the converted baseband signal into the sample rate value of the baseband signal corresponding to the BBU, and sends the converted baseband signal to the BBU .

In implementation, the signal processing method in FIG. 6 is an uplink signal processing method, corresponding to the signal processing method (downlink signal processing method) in FIG. 6 .

Preferably, the set sampling rate value in step 301 is the same as the set sampling rate value in step 601 .

Preferably, before step 601, the RRU converts the received radio frequency signal into a baseband signal whose sampling rate value is the set sampling rate value, it also includes:

The RRU determines the set sampling rate value according to the clock frequency value determined by the clock distributor.

The implementation of determining the set sampling rate value by the RRU according to the clock frequency value determined by the clock distributor is similar to the implementation of determining the set sampling rate value in FIG. 3 , which will not be repeated here.

Wherein, the RRU receives radio frequency signals from at least one antenna.

The following will introduce the radio frequency signal received from one antenna as an example. The implementation mode of receiving radio frequency signal from multiple antennas is similar to the implementation mode of the embodiment of the present invention, except that for the case of receiving radio frequency signal from multiple antennas, At least one second processing unit may be used. When the number of second processing units is the same as the number of antennas, each second processing unit processes the radio frequency signal received by an antenna corresponding to the second processing unit, wherein, The structure of each second processing unit is the same, including a low noise amplifier module, a frequency conversion module and a digital intermediate frequency module.

As shown in Figure 5, after the RF signal received from the antenna port (TX1/RX1) is filtered, it is input to the low noise amplifier module, the filtered RF signal is amplified, and the amplified RF signal is input to the frequency conversion Module, to convert the amplified RF signal into an intermediate frequency signal, input the intermediate frequency signal to the ADC (analog-to-digital converter) of the digital intermediate frequency module, and move the intermediate frequency signal processed by the ADC through the down-conversion DDC of the FPGA3 of the digital intermediate frequency module to the baseband signal, the sampling rate value of the signal is the set sampling rate value.

During implementation, the system module of FPGA3 can be set to determine the set sampling rate value according to the clock frequency value determined by the clock distributor as required.

Wherein, the low noise amplifier module includes LNA, which is used to amplify the filtered radio frequency signal and control the uplink noise).

Among them, the frequency conversion module includes Mixer (mixer) and AMP (amplifier, amplifier), and Mixer is used to mix the RF signal filtered by the filter Filter with the signal output by the second RF phase-locking source to obtain the RF The corresponding intermediate frequency signal of the signal.

Preferably, as shown in Figure 5, the power supply module of the RRU can adopt digital board integration technology, and the monitoring module of the RRU is based on OMAP (Open Multimedia Application Platform, open multimedia application platform).

In implementation, the DDC can be used to convert the received radio frequency signal into a baseband signal whose sampling rate value is the set sampling rate value, and convert the sampling rate value of the baseband signal with the set sampling rate value separately into the corresponding sampling rate value of the BBU of each standard.

Preferably, FPGA3 can send the baseband signal corresponding to the BBU of the standard to the BBU.

Wherein, in step 602, the RRU sends the baseband signal corresponding to the BBU of the standard to the BBU, including:

The RRU transmits the baseband signals of the sampling rate values corresponding to the BBUs of the N standards to the BBUs of the corresponding standards from the N optical ports and through the N optical fibers.

Wherein, when the radio frequency signals received by multiple antennas are processed by one second processing unit, the radio frequency signals received by each antenna are processed in different time periods.

Based on the same inventive concept, an RRU is also provided in the embodiment of the present invention. Since the principle of solving the problem of this device is similar to the method of the embodiment of the present invention, the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated. .

FIG. 7 is a schematic structural diagram of an RRU according to an embodiment of the present invention. As shown in the figure, the RRU according to this embodiment of the present invention includes:

The first conversion module 701 is configured to convert the received sampling rate value of the baseband signal from each BBU into a set sampling rate value;

The first processing module 702 is configured to determine a radio frequency signal according to the converted baseband signal, and transmit the radio frequency signal through at least one antenna.

Preferably, the first conversion module 701 is also used to receive the baseband signal from the BBU through the corresponding optical port of the BBU for a BBU; one standard of a BBU corresponds to one optical port, and one optical port corresponds to one BBU.

Preferably, the first conversion module 701 is further configured to determine a set sampling rate value according to the clock frequency value determined by the clock distributor.

Preferably, after receiving baseband signals corresponding to multiple BBUs; the first conversion module 701 is also used to synthesize at least two baseband signals of all converted baseband signals into one baseband signal;

Correspondingly, the first processing module 702 is specifically configured to determine the radio frequency signal corresponding to the synthesized baseband signal according to the synthesized baseband signal.

In implementation, the first conversion module 701 and the first processing module 702 are equivalent to a first processing unit.

FIG. 8 is a schematic diagram of the structure of the RRU according to the embodiment of the present invention. As shown in the figure, the RRU according to the embodiment of the present invention includes:

The second conversion module 801 is configured to convert the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value;

The second processing module 802 is configured to convert the sampling rate value of the converted baseband signal into the sampling rate value of the baseband signal corresponding to the BBU for each standard BBU connected to the RRU, and convert the converted baseband signal sent to the BBU.

Preferably, the second conversion module 801 is further configured to determine a set sampling rate value according to the clock frequency value determined by the clock distributor.

In implementation, the second converting module 801 and the second processing module 802 are equivalent to the second processing unit.

During implementation, the modules corresponding to the RRU in FIG. 7 and the modules corresponding to the RRU in FIG. 8 in the embodiment of the present invention may be integrated into the same RRU.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (12)

1. A method for signal processing, characterized in that the method comprises: The remote radio unit RRU connected to each baseband processing unit BBU of multiple standards converts the sampling rate value of the baseband signal received from the BBU into a set sampling rate value; The RRU determines a radio frequency signal according to the converted baseband signal, and transmits the radio frequency signal through at least one antenna. 2. The method according to claim 1, wherein the RRU receives a plurality of baseband signals; After the RRU converts the received sampling rate value of the baseband signal from the BBU into a set sampling rate value, before determining the radio frequency signal, it also includes: The RRU synthesizes at least two baseband signals among all converted baseband signals into one baseband signal; The RRU determines the radio frequency signal according to the converted baseband signal, including: The RRU determines the radio frequency signal corresponding to the synthesized baseband signal according to the synthesized baseband signal. 3. The method according to claim 1, wherein the RRU further comprises: The RRU determines the set sampling rate value according to the clock frequency value determined by the clock distributor. 4. The method according to claim 1, wherein the RRU receives the baseband signal from the BBU, comprising: For a BBU, the RRU receives a baseband signal from the BBU through an optical port corresponding to the BBU; One standard of one BBU corresponds to one optical port, and one optical port corresponds to one BBU. 5. A method for signal processing, characterized in that the method comprises: The radio remote unit RRU connected to each baseband processing unit BBU of multiple standards converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value; For each type of BBU connected to the RRU, the RRU converts the sample rate value of the converted baseband signal into the sample rate value of the baseband signal corresponding to the BBU, and sends the converted baseband signal to the BBU. 6. The method according to claim 5, wherein, before the RRU converts the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value, it also includes: The RRU determines the set sampling rate value according to the clock frequency value determined by the clock distributor. 7. A remote radio unit RRU, characterized in that the RRU includes: The first conversion module is used to convert the received sampling rate value of the baseband signal from each baseband processing unit BBU into a set sampling rate value; The first processing module is configured to determine a radio frequency signal according to the converted baseband signal, and transmit the radio frequency signal through at least one antenna. 8. The RRU according to claim 7, wherein the baseband signals corresponding to a plurality of BBUs are received; The first converting module is further configured to synthesize at least two baseband signals among all converted baseband signals into one baseband signal; The first processing module is specifically configured to determine a radio frequency signal corresponding to the synthesized baseband signal according to the synthesized baseband signal. 9. The RRU according to claim 7, wherein the first conversion module is further configured to determine the set sampling rate value according to the clock frequency value determined by the clock distributor. 10. The RRU according to claim 7, wherein the first conversion module is further configured to receive a baseband signal from the BBU through an optical port corresponding to the BBU for a BBU; one of the BBUs The standard corresponds to one optical port, and one optical port corresponds to one BBU. 11. A remote radio unit RRU, characterized in that the RRU includes: The second conversion module is used to convert the received radio frequency signal into a baseband signal whose sampling rate value is a set sampling rate value; The second processing module is used to convert the sampling rate value of the converted baseband signal into the sampling rate value of the baseband signal corresponding to the BBU for each standard BBU connected to the RRU, and convert the converted baseband signal The signal is sent to the BBU. 12. The RRU according to claim 11, wherein the second conversion module is further configured to determine the set sampling rate value according to the clock frequency value determined by the clock distributor.