A data transmission method, base station, device and storage medium

Abstract

The embodiments of the present invention provide a data transmission method, a base station, a device and a storage medium, which relate to the technical field of data transmission, wherein, when applied to a BBU, the method comprises: obtaining data to be transmitted and a carrier number configuration. Baseband processing is performed on the data to be transmitted, and frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing is obtained. The frequency domain data and the carrier number configuration are sent to the AAU via the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration. The solution provided by the embodiment of the present invention can reduce the amount of data transmitted between the BBU and the AAU via the CPRI interface, thereby realizing ultra-bandwidth data transmission between the BBU and the AAU, and improving the performance of the base station.

Description

Technical Field

[0001] The present invention relates to the technical field of data transmission, and in particular to a data transmission method, base station, device and storage medium. Background Art

[0002] The 5G base station includes a BBU (BaseBand Unit) and an AAU (Active Antenna Unit). The BBU performs baseband processing on the data from the core network to obtain baseband time domain data, and sends the baseband time domain data to the AAU. The AAU performs digital intermediate frequency and radio frequency processing on the baseband time domain data and sends the processed data to the outside.

[0003] For distributed base stations, data transmission between BBU and AAU is generally based on CPRI interface (Common Public Radio Interface). However, in the process of 5G millimeter wave communication, the data transmission speed is fast, and BBU needs to process a large amount of data in a short time, which leads to a large amount of data that needs to be transmitted between BBU and AAU through CPRI interface, and the transmission bandwidth requirement of CPRI interface is high. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a data transmission method, a base station, a device and a storage medium to reduce the amount of data transmitted between the BBU and the AAU via the CPRI interface. The specific technical solution is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to a BBU. The method includes:

[0006] Obtain data to be transmitted and configuration of the number of carriers;

[0007] Performing baseband processing on the data to be transmitted to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing;

[0008] The frequency domain data and the carrier number configuration are sent to the AAU through the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

[0009] In one embodiment of the present invention, performing baseband processing on the data to be transmitted to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing includes:

[0010] Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process;

[0011] Performing bit-level data processing on the first data to obtain second data;

[0012] The second data is subjected to symbol-level data processing to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration.

[0013] In one embodiment of the present invention, after baseband processing is performed on the data to be transmitted, and frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing is obtained, the method further includes:

[0014] Using a preset compression algorithm to perform data compression processing on the frequency domain data to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data;

[0015] The sending the frequency domain data and the carrier number configuration to the AAU through the CPRI interface includes:

[0016] The compressed frequency domain data and the carrier number configuration are sent to the AAU via the CPRI interface.

[0017] In one embodiment of the present invention, performing baseband processing on the data to be transmitted to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing includes:

[0018] Baseband processing is performed on the data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between data amounts meets the preset ratio.

[0019] In one embodiment of the present invention, the preset ratio is obtained by:

[0020] Obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell;

[0021] According to the cell information of each cell, the ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio.

[0022] In one embodiment of the present invention, determining the ratio between the data amounts of the frequency domain data corresponding to each cell according to the cell information of each cell as the preset ratio includes:

[0023] The ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio by at least one of the following methods:

[0024] The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0025] The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0026] According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

[0027] In a second aspect, an embodiment of the present invention provides a data transmission method, which is applied to AAU, and the method includes:

[0028] Receive frequency domain data and carrier number configuration sent by BBU through CPRI interface;

[0029] Converting the frequency domain data into time domain data according to the carrier number configuration;

[0030] The time domain data is subjected to digital intermediate frequency and radio frequency processing.

[0031] In one embodiment of the present invention, the receiving of frequency domain data and carrier number configuration sent by the BBU through the CPRI interface includes:

[0032] receiving compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface, wherein the compressed frequency domain data is data obtained by the BBU performing data compression processing on the frequency domain data using a preset compression algorithm, and the compression algorithm is an algorithm for reducing the number of bits used to represent each data;

[0033] Before converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes:

[0034] A preset decompression algorithm corresponding to the compression algorithm is used to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

[0035] In one embodiment of the present invention, before converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes:

[0036] Performing AC processing on the frequency domain data;

[0037] and / or

[0038] After converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes:

[0039] A cyclic prefix is ​​added to the time domain data.

[0040] In a third aspect, an embodiment of the present invention provides a base station, wherein the base station includes a BBU and an AAU:

[0041] The BBU is used to obtain data to be transmitted and a carrier number configuration; perform baseband processing on the data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing; and send the frequency domain data and the carrier number configuration to the AAU through the CPRI interface;

[0042] The AAU is used to receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface; convert the frequency domain data into time domain data according to the carrier number configuration; and perform digital intermediate frequency and radio frequency processing on the time domain data.

[0043] In one embodiment of the present invention, the BBU is specifically used for:

[0044] Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process;

[0045] Performing bit-level data processing on the first data to obtain second data;

[0046] The second data is subjected to symbol-level data processing to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration.

[0047] In one embodiment of the present invention, the BBU is further used to perform data compression processing on the frequency domain data using a preset compression algorithm to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data;

[0048] The BBU is specifically used to send the compressed frequency domain data and the carrier number configuration to the AAU through the CPRI interface;

[0049] The AAU is specifically used to receive the compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface;

[0050] The AAU is further used to adopt a preset decompression algorithm corresponding to the compression algorithm to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

[0051] In one embodiment of the present invention, the BBU is specifically used to perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, in which the ratio between data amounts meets a preset ratio.

[0052] In one embodiment of the present invention, the BBU is specifically configured to obtain the preset ratio in the following manner:

[0053] Obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell;

[0054] According to the cell information of each cell, the ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio.

[0055] In one embodiment of the present invention, the BBU is specifically used to determine the ratio between the data amounts of the frequency domain data corresponding to each cell as the preset ratio by at least one of the following methods:

[0056] The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0057] The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0058] According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

[0059] In one embodiment of the present invention, the AAU is further used for:

[0060] Performing AC processing on the frequency domain data;

[0061] and / or

[0062] A cyclic prefix is ​​added to the time domain data.

[0063] In a fourth aspect, an embodiment of the present invention provides a data transmission device, applied to a BBU, the device comprising:

[0064] A configuration acquisition module is used to obtain the data to be transmitted and the number of carrier configurations;

[0065] A baseband processing module, used to perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing;

[0066] The data sending module is used to send the frequency domain data and the carrier number configuration to the AAU through the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

[0067] In a fifth aspect, an embodiment of the present invention provides a data transmission device, applied to AAU, the device comprising:

[0068] A data receiving module is used to receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface;

[0069] A time domain conversion module, configured to convert the frequency domain data into time domain data according to the carrier number configuration;

[0070] The digital processing module is used to perform digital intermediate frequency and radio frequency processing on the time domain data.

[0071] In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method steps described in any one of the first aspect or the second aspect are implemented.

[0072] In a seventh aspect, an embodiment of the present invention further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method steps described in any one of the first aspect or the second aspect.

[0073] Beneficial effects of the embodiments of the present invention:

[0074] When the BBU transmits data using the method provided in the embodiment of the present invention, after obtaining the data to be transmitted and the carrier number configuration, the BBU performs baseband processing on the data to be transmitted, obtains frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and sends the frequency domain data and the carrier number configuration to the AAU through the CPRI interface.

[0075] As can be seen from the above, after the BBU performs baseband processing on the data to be transmitted, the frequency domain data generated by carrier aggregation can be obtained, and the data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-bandwidth data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and a person skilled in the art can also obtain other drawings based on these drawings.

[0077] Figure 1 A schematic diagram of a flow chart of a first data transmission method provided by an embodiment of the present invention;

[0078] Figure 2 A schematic diagram of a L2 layer processing flow provided by an embodiment of the present invention;

[0079] Figure 3A A schematic diagram of a first carrier aggregation result provided in an embodiment of the present invention;

[0080] Figure 3B A schematic diagram of a second carrier aggregation result provided by an embodiment of the present invention;

[0081] Figure 3C A schematic diagram of a third carrier aggregation result provided by an embodiment of the present invention;

[0082] Figure 4 A schematic diagram of a data processing flow of a first BBU provided in an embodiment of the present invention;

[0083] Figure 5A A schematic diagram of a flow chart of a second data transmission method provided by an embodiment of the present invention;

[0084] Figure 5B A schematic diagram of a data processing flow of a second BBU provided in an embodiment of the present invention;

[0085] Figure 6 A schematic diagram of a flow chart of a third data transmission method provided by an embodiment of the present invention;

[0086] Figure 7 A schematic diagram of a flow chart of a fourth data transmission method provided by an embodiment of the present invention;

[0087] Figure 8 A schematic diagram of a data processing flow of a first AAU provided in an embodiment of the present invention;

[0088] Fig.9A A schematic diagram of a fifth data transmission method according to an embodiment of the present invention;

[0089] Fig. 9B A schematic diagram of a data processing flow of a second AAU provided in an embodiment of the present invention;

[0090] Fig.10A schematic diagram of the structure of a base station provided in an embodiment of the present invention;

[0091] Fig.11 A schematic diagram of the structure of a first data transmission device provided by an embodiment of the present invention;

[0092] Fig.12 A schematic diagram of the structure of a second data transmission device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0093] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0094] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0095] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0096] In the prior art, a large amount of data needs to be transmitted between the BBU and the AAU through the CPRI interface, and a high transmission bandwidth requirement is placed on the CPRI interface. To solve this problem, an embodiment of the present invention provides a data transmission method, a base station, an apparatus, and a storage medium.

[0097] An embodiment of the present invention provides a data transmission method, which is applied to a BBU. The method includes:

[0098] Get the data to be transmitted and the number of carriers configured.

[0099] Baseband processing is performed on the above-mentioned data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the above-mentioned carrier number configuration during the baseband processing.

[0100] The frequency domain data and carrier number configuration are sent to the AAU via the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

[0101] As can be seen from the above, after the BBU performs baseband processing on the data to be transmitted, the frequency domain data generated by carrier aggregation can be obtained, and the data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-bandwidth data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station.

[0102] Another data transmission method provided by an embodiment of the present invention is applied to AAU, and the method includes:

[0103] Receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface.

[0104] According to the above carrier number configuration, the above frequency domain data is converted into time domain data.

[0105] The above time domain data is processed by digital intermediate frequency and radio frequency.

[0106] As can be seen from the above, the data received by the AAU and transmitted by the BBU through the CPRI interface is frequency domain data. Since the amount of frequency domain data is usually lower than that of time domain data, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided by the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing of the AAU.

[0107] The technical solution provided by the embodiment of the present invention can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new radio (NR) system, etc. These various systems include terminals and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0108] The terminal involved in the embodiment of the present invention may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal may also be different. For example, in a 5G system, the terminal may be called a user equipment (UE). A wireless terminal can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal may be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. A wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, and a user device, but is not limited thereto in the embodiments of the present application.

[0109] In addition, in an embodiment of the present invention, the base station and the terminal may each use one or more antennas for multiple input multiple output (MIMO) transmission, and the MIMO transmission may be single user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or may be diversity transmission, precoded transmission or beamforming transmission, etc.

[0110] See also Figure 1, is a flow chart of a first data transmission method provided in an embodiment of the present invention, which is applied to BBU. The method includes the following steps S101-S103.

[0111] S101: Obtain data to be transmitted and configuration of the number of carriers.

[0112] The data to be transmitted may be data from a core network.

[0113] Specifically, the BBU can divide the data to be transmitted into multiple carriers for parallel processing according to the carrier number configuration. The carrier number configuration defines the number of carriers and the bandwidth of each carrier. For example, the multiple carriers can be 3 400M carriers, 6 200M carriers, mixed bandwidth carriers of 2 400M carriers and 2 200M carriers, 12 100M carriers, 2 400M carriers, 4 200M carriers, 10 100M carriers, 5 200M carriers, etc.

[0114] S102: Perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by performing carrier aggregation according to the above carrier number configuration during the baseband processing.

[0115] In one embodiment of the present invention, the process of performing baseband processing on the data to be processed includes sequentially performing high-layer protocol processing, L2 layer processing, and physical layer processing on the data to be processed.

[0116] In the process of physical layer processing, it is necessary to sequentially perform multiple data processing on the data obtained through L2 layer processing. No matter which data processing is performed, as long as the result obtained after the data processing is frequency domain data, it can be used as the output result of BBU, and the above data processing is the last step of data processing performed by BBU. Then, the data processing performed after the above last step of data processing in the above physical layer processing can be moved to AAU, and after receiving the frequency domain data sent by BBU, AAU continues to complete the above physical layer processing process, and then performs the digital intermediate frequency and radio frequency processing that AAU needs to perform.

[0117] For the convenience of description, the physical layer processing performed in the BBU may be referred to as physical layer high-layer processing, and the physical layer processing performed in the AAU may be referred to as physical layer low-layer processing.

[0118] In the example of the present invention, the high-level physical layer processing performed by the BBU may include bit-level data processing and symbol-level data processing. The L2 layer processing includes the process of performing carrier aggregation according to the carrier number configuration. The high-level protocol processing is the same as the data processing process performed by the BBU in the prior art, and the embodiment of the present invention will not be repeated.

[0119] Specifically, the above step S102 can be implemented through the following steps A-C.

[0120] Step A: baseband processing is performed on the above-mentioned data to be transmitted to obtain first data after L2 layer processing, which is generated by carrier aggregation according to the above-mentioned carrier number configuration during L2 layer processing.

[0121] See also Figure 2 , a schematic diagram of the L2 layer processing flow is provided.

[0122] As can be seen from the figure, in the process of L2 layer processing, the data obtained after the high-level protocol processing is first processed by CA-PDCP (CA Packet Data Convergence Protocol, packet data convergence protocol under carrier aggregation) and then processed by CA-RLC (CA Radio Link Control, radio link control under carrier aggregation) to obtain 12 carriers, and then CC MAC (Component Carrier MAC Control Element, member carrier media access control) is processed in parallel on the obtained 12 carriers.

[0123] Among them, the overall bandwidth of the above 12 carriers is relatively large, which can realize high-speed ultra-bandwidth transmission between BBU and AAU. The bandwidth of each carrier can be 100M, and each carrier can be called a CC (Component Carrier) in the process of carrier aggregation. If two of the component carriers are carrier aggregated, a carrier with a bandwidth of 200M can be aggregated. If four of the component carriers are carrier aggregated, a carrier with a bandwidth of 400M can be aggregated, and so on.

[0124] in addition, Figure 2The CA-SCH (Carrier Aggregation Scheduler) shown is used to control the aggregation of each component carrier according to the carrier number configuration, and reasonably distribute the data traffic to the carrier corresponding to each cell for transmission during scheduling. For example, the above-mentioned cells can be 3 400M cells, each cell corresponding to a carrier with a bandwidth of 400M, or 6 200M cells, each cell corresponding to a carrier with a bandwidth of 200M, or 12 100M cells, each cell corresponding to a carrier with a bandwidth of 100M, etc. Each CC SCH (Component Carrier Scheduler) included in the CA-SCH is used to process one component carrier. Each carrier obtained by carrier aggregation of the component carriers is used to transmit data for a cell of the base station where the above-mentioned BBU is installed.

[0125] In addition, after CA-RLC processing, other numbers of carriers such as 8 or 10 can be obtained.

[0126] See also Figure 3A , is a schematic diagram of the first carrier aggregation result provided in an embodiment of the present invention.

[0127] Among them, it can be seen from the figure that the above carrier aggregation result is 6 carriers with bandwidths of 200M CC respectively, and the total bandwidth is 1200M.

[0128] Specifically, when the number of carriers is configured as 6*200M, CA-SCH can control carrier 1 and carrier 2, carrier 3 and carrier 4, carrier 5 and carrier 6, and so on to perform carrier aggregation, and obtain 6 carriers with bandwidths of 200M each, including 1 main carrier and 5 auxiliary carriers.

[0129] See also Figure 3B , is a schematic diagram of the second carrier aggregation result provided in an embodiment of the present invention.

[0130] Among them, it can be seen from the figure that the above carrier aggregation result is 3 carriers with bandwidths of 400M CC respectively, and the total bandwidth is 1200M.

[0131] Specifically, when the number of carriers is configured as 3*400M, CA-SCH can control carriers 1-4, carriers 5-8, and carriers 9-12 to perform carrier aggregation to obtain three carriers with bandwidths of 400M, including one main carrier and two auxiliary carriers.

[0132] See also Figure 3C , is a schematic diagram of the third carrier aggregation result provided in an embodiment of the present invention.

[0133] Among them, it can be seen from the figure that the above carrier aggregation results are 2 carriers with bandwidths of 200M CC respectively, and 2 carriers with bandwidths of 400M CC respectively, and the total bandwidth is 1200M.

[0134] Specifically, when the number of carriers is configured as 2*400M+2*200M, CA-SCH can control the carrier aggregation of carriers 1-4, carriers 5-8, carriers 9-10, and carriers 11-12 respectively to obtain mixed bandwidth carriers with 2 bandwidths of 400M and 2 bandwidths of 200M respectively.

[0135] It can be seen from the above description that the first data obtained after L2 layer processing can be multi-channel data matching the carrier number configuration.

[0136] Step B: Perform bit-level data processing on the first data to obtain second data.

[0137] Specifically, the above-mentioned data processing at the bit level can be called downlink bit-level processing, and the above-mentioned data processing process at the bit level can include: bit-level encoding, rate matching, scrambling, and resource mapping of PDSCH (Physical Downlink Shared Channel) and PDCCH (Physical Downlink Control Channel) at the bit level for the first data. The above-mentioned data processing at the bit level is similar to the prior art, and the embodiments of the present invention will not be repeated here.

[0138] When multiple channels of first data are obtained after L2 layer processing, bit-level data processing can be performed on the multiple channels of first data in parallel to obtain multiple channels of second data.

[0139] Step C: Perform symbol-level data processing on the second data to obtain frequency domain data generated by carrier aggregation according to the above carrier number configuration.

[0140] Specifically, the data processing at the symbol level may be referred to as downlink symbol level processing, and the data processing at the symbol level may include: signal modulation, layer mapping, and digital domain beamforming. The data processing at the symbol level is similar to the prior art, and the embodiments of the present invention will not be described in detail.

[0141] The symbol-level data processing includes converting the second data from time domain data to frequency domain data, thereby obtaining the frequency domain data. The second data can be converted from time domain data to frequency domain data by a Fourier transform algorithm, for example, the Fourier transform algorithm can be an FFT (Fast Fourier Transform) algorithm.

[0142] S103: Send the frequency domain data and carrier number configuration to the AAU through the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

[0143] Specifically, the AAU and BBU form a base station, and the BBU and AAU can be connected via optical fiber. The number of the CPRI interfaces is related to the number of interfaces actually installed between the BBU and the AAU, wherein data can be transmitted between the BBU and the AAU via three 25G CPRI interfaces. If the number of the CPRI interfaces is less than the number of the frequency domain data, it is necessary to merge the frequency domain data of each channel to obtain the merged frequency domain data whose number is less than or equal to the number of CPRI interfaces, and then send it to the AAU via the CPRI interface.

[0144] In order to ensure the data transmission rate between the BBU and the AAU, the frequency domain data may be transmitted between the BBU and the AAU via optical fiber.

[0145] In addition, the process of the AAU processing the frequency domain data based on the carrier number configuration can be seen below. Figure 7 The embodiment shown is not described in detail in the embodiment of the present invention.

[0146] See also Figure 4 , is a schematic diagram of the data processing flow of the first BBU provided in an embodiment of the present invention.

[0147] As can be seen from the figure, the BBU first performs high-level protocol processing and L2 layer processing on the data to be transmitted to obtain m-channel first data, and then performs bit-level data processing and symbol-level data processing on the m-channel first data in turn to obtain m-channel frequency domain data. After the number of carriers is configured, the frequency domain data is sent to the AAU through three CPRI interfaces.

[0148] As can be seen from the above, after the BBU performs baseband processing on the data to be transmitted, the frequency domain data generated by carrier aggregation can be obtained, and the data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-bandwidth data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station.

[0149] See also Figure 5A, is a flow chart of a second data transmission method provided by an embodiment of the present invention, which is similar to the above Figure 1 Compared with the embodiment shown, after the above step S102, the following step S104 is also included.

[0150] S104: Using a preset compression algorithm to perform data compression processing on the frequency domain data to obtain compressed frequency domain data.

[0151] The compression algorithm is an algorithm for reducing the number of bits used to represent each data.

[0152] Specifically, each data in the above frequency domain data can be represented by 16 bits, and the above compression algorithm can be used to compress the number of bits used to represent each data to a preset number of bits less than 16 bits. For example, the above preset number of bits can be 8.

[0153] In one embodiment of the present invention, a compression algorithm commonly used in the prior art may be used to perform data compression processing on the frequency domain data, which will not be described in detail in this embodiment of the present invention.

[0154] With the aforementioned Figure 1 Compared with the embodiment shown, the above step S103 can be implemented by the following step S103A.

[0155] S103A: Send the compressed frequency domain data and carrier number configuration to the AAU via the CPRI interface.

[0156] Specifically, the above step S103A is similar to the above step S103, and will not be described in detail in this embodiment of the present invention.

[0157] See also Figure 5B , is a schematic diagram of the data processing flow of the second BBU provided in an embodiment of the present invention.

[0158] With the aforementioned Figure 4 In comparison, the above Figure 5B After the data processing at the symbol level, the frequency domain data is also compressed to obtain compressed frequency domain data, thereby reducing the data volume of the frequency domain data.

[0159] As can be seen from the above, before sending the frequency domain data to the AAU, the BBU also performs data compression on the frequency domain data, thereby reducing the data volume of the frequency domain data and obtaining compressed frequency domain data with a smaller data volume. Then, the compressed frequency domain data is sent to the AAU through the data baseband interface, which can further reduce the data volume transmitted between the BBU and the AAU through the CPRI interface and further reduce the transmission bandwidth requirements of the CPRI interface.

[0160] See also Figure 6, is a flow chart of a third data transmission method provided by an embodiment of the present invention, which is similar to the above Figure 1 Compared with the embodiment shown, the above step S102 can be implemented by the following step S102A.

[0161] S102A: Perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by carrier aggregation according to the carrier number configuration in the baseband processing process, in which the ratio between data amounts meets the preset ratio.

[0162] Specifically, during L2 layer processing in the baseband processing process, the amount of time domain data carried in each carrier generated can be allocated according to a preset ratio through CA-RLC processing. After each channel of time domain data is converted into frequency domain data, the ratio of the amount of data between each channel of frequency domain data meets the above preset ratio.

[0163] In addition, since each carrier obtained by carrier aggregation corresponds to a cell of the base station, and each carrier carries one channel of frequency domain data, each channel of frequency domain data corresponds to data transmitted in one cell.

[0164] In one embodiment of the present invention, the product of the total amount of data obtained after CA-RLC processing and the preset ratio corresponding to each frequency domain data can be calculated to obtain the amount of time domain data carried in the carrier corresponding to the frequency domain data of the path.

[0165] From the above, it can be seen that in the embodiment of the present invention, the BBU can control the data volume of each frequency domain data generated according to a preset ratio. Since the data volume of each frequency domain data generated is different, the data volume of data transmitted in each cell of the base station can be different, and the base station can control the data volume of data transmitted in different cells.

[0166] In another embodiment of the present invention, the above-mentioned preset ratio can be obtained through the following steps D-E.

[0167] Step D: Obtain the cell information of each cell of the base station of the BBU and AAU.

[0168] The cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell.

[0169] Specifically, the spectrum efficiency of each cell can be obtained according to the communication quality of the terminal in each cell. The higher the communication quality of the terminal, the higher the spectrum efficiency. The communication quality of the cell can be represented by the data transmission rate of the cell, and the spectrum efficiency can be obtained by dividing the data transmission rate by the current bandwidth of the cell.

[0170] In addition, for each cell, the average value, maximum value, minimum value, etc. of the transmission rate of the terminals performing data transmission in the cell may be statistically obtained as the transmission rate of the cell.

[0171] Furthermore, for each cell, the number of terminals included in the cell or the amount of data requested by the terminals may be used as the load information of the cell.

[0172] Step E: According to the cell information of each cell, the ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio.

[0173] In one embodiment of the present invention, the ratio between the data amounts of the frequency domain data corresponding to each cell may be determined by at least one of the following steps E1-E3.

[0174] Step E1: Determine the ratio between the spectrum efficiencies of the cells as the ratio between the data volumes of the frequency domain data corresponding to the cells.

[0175] That is, the higher the spectrum efficiency of a cell, the better the communication quality of the cell, and the larger the amount of frequency domain data corresponding to the cell.

[0176] Step E2: Determine the ratio between the transmission rates of the cells as the ratio between the data volumes of the frequency domain data corresponding to the cells.

[0177] That is, the greater the transmission rate of a cell, the stronger the data transmission capability of the cell, and the greater the amount of frequency domain data corresponding to the cell.

[0178] Step E3: According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

[0179] That is, the higher the load of a cell, the more difficult it is for the cell to transmit a large amount of data. Therefore, the amount of frequency domain data corresponding to the cell can be reduced, and the amount of data that the cell needs to transmit can be reduced, thereby reducing the load of the cell.

[0180] Specifically, if the load of the cell is higher than the first preset load, the first preset ratio difference can be reduced based on the preset ratio currently corresponding to the cell. If the load of the cell is lower than the second preset load, the second preset ratio difference can be increased based on the preset ratio currently corresponding to the cell.

[0181] Among them, the above-mentioned first preset load is greater than or equal to the second preset load, and the above-mentioned first preset proportional difference and the second preset proportional difference are both positive values, and the values ​​of the two can be the same or different.

[0182] As can be seen from the above, the preset ratio between the data volume of the frequency domain data corresponding to each cell is determined by the current data transmission situation of each cell. As the data transmission situation of the above cell changes, the value of the above preset ratio will also change dynamically. Therefore, the above BBU can dynamically allocate the data volume of the frequency domain data corresponding to each cell based on the data transmission situation of the cell. When the data transmission of the cell is high, the data volume of the frequency domain data corresponding to the cell can be increased accordingly to make full use of the data transmission resources of the cell. Conversely, when the data transmission of the cell is low, the data volume of the frequency domain data corresponding to the cell can be reduced accordingly to reduce the data transmission pressure of the cell. Thereby, normal data transmission of each cell can be maintained.

[0183] Corresponding to the aforementioned data transmission method applied to the BBU, an embodiment of the present invention further provides a data transmission method applied to the AAU.

[0184] See also Figure 7 , is a flow chart of a fourth data transmission method provided in an embodiment of the present invention, which is applied to AAU. The method includes the following steps S701-S703.

[0185] S701: Receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface.

[0186] S702: Convert the frequency domain data into time domain data according to the carrier number configuration.

[0187] In one embodiment of the present invention, since the number of the above-mentioned CPRI interfaces may be less than the number of paths of the frequency domain data generated by the above-mentioned BBU, the BBU may merge the generated frequency domain data before sending the frequency domain data to the above-mentioned AAU through the above-mentioned CPRI interface, and obtain the merged frequency domain data with a number of paths less than or equal to the number of CPRI interfaces, and then send it to the AAU through the CPRI interface.

[0188] Therefore, the frequency domain data received by the AAU may be frequency domain data after merging. Therefore, the AAU can first convert the received frequency domain data into frequency domain data matching the carrier number configuration according to the carrier number configuration, that is, obtain data similar to the frequency domain data generated by the BBU after baseband processing of the transmitted data.

[0189] In addition, the manner in which the AAU converts frequency domain data into time domain data corresponds to the manner in which the BBU converts time domain data into frequency domain data. Specifically, when the BBU converts time domain data into frequency domain data by using an FFT algorithm, the AAU may convert frequency domain data into time domain data by using an IFFT (Invert Fast Fourier Transformation) algorithm.

[0190] Furthermore, in the case where the frequency domain data is multi-channel frequency domain data, the multi-channel frequency domain data may be subjected to parallel time domain transformation.

[0191] In another embodiment of the present invention, before converting the frequency domain data into time domain data, AC (Antenna Calibration) processing may be performed on the frequency domain data, so as to achieve antenna calibration and compensate for the amplitude and phase errors between antennas.

[0192] Specifically, the method in the prior art may be used to perform AC processing on the frequency domain data, which is not limited in the embodiment of the present invention.

[0193] In yet another embodiment of the present invention, after the frequency domain data is converted into time domain data, a CP (Cyclic Prefix) process may be performed on the time domain data.

[0194] Specifically, the method in the prior art may be used to perform CP processing on the time domain data, which is not limited in the embodiment of the present invention.

[0195] In addition, the above-mentioned AC processing, IFFT processing, and CP adding processing can be referred to as low-level physical layer processing performed by AAU.

[0196] S703: Perform digital intermediate frequency and radio frequency processing on the time domain data.

[0197] The performing of digital intermediate frequency and radio frequency processing on the time domain data includes: performing digital intermediate frequency processing and radio frequency processing on the time domain data in sequence.

[0198] Specifically, the above-mentioned digital intermediate frequency and radio frequency processing specifically includes DUC (Digital UpConversion) processing of time domain data, analog domain beamforming, beamforming chip array, antenna array, radio frequency processing, etc. After the digital intermediate frequency and radio frequency processing of the time domain data, the processing results can be sent to the wireless air interface.

[0199] With the aforementioned Figure 4 Correspondingly, see Figure 8, which is a schematic diagram of the data processing flow of the first AAU provided in an embodiment of the present invention.

[0200] As can be seen from the figure, after the AAU receives the frequency domain data through the CPRI interface, it first configures the number of carriers to obtain m channels of frequency domain data. The value of m is the same as the above Figure 4 In the illustrated embodiment, the value of m is the same. AC processing and IFFT processing are performed on the m frequency domain data respectively to obtain m time domain data, and then CP processing is performed on the time domain data, and then digital intermediate frequency and radio frequency processing are performed.

[0201] As can be seen from the above, the data received by the AAU and transmitted by the BBU through the CPRI interface is frequency domain data. Since the amount of frequency domain data is usually lower than that of time domain data, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided by the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing of the AAU.

[0202] See also Fig.9A , is a flow chart of a fifth data sending method provided in an embodiment of the present invention, which is similar to the above Figure 7 Compared with the embodiment shown, the above step S701 can be implemented by the following step S701A.

[0203] S701A: Receives compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface.

[0204] The compressed frequency domain data is data obtained by the BBU using a preset compression algorithm to perform data compression processing on the frequency domain data. The compression algorithm is an algorithm for reducing the number of bits used to represent each data.

[0205] Specifically, the process of the BBU compressing the frequency domain data can be referred to in the above Figure 5A The step S104 shown is not described in detail in this embodiment of the present invention.

[0206] With the aforementioned Figure 7 Compared with the embodiment shown in the figure, the following step S704 is also included before the above step S702.

[0207] S704: Using a preset decompression algorithm corresponding to the compression algorithm, perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

[0208] Specifically, only by using a decompression algorithm corresponding to the above compression algorithm can it be ensured that the frequency domain data obtained after decompression processing of the compressed frequency domain data is the same as the frequency domain data before the data compression processing.

[0209] If each datum in the frequency domain data is 16 bits before the BBU performs data compression processing on the frequency domain data, each datum in the frequency domain data obtained after the AAU performs data decompression processing on the compressed frequency domain data is also 16 bits.

[0210] With the aforementioned Figure 5B Correspondingly, see Fig. 9B , which is a schematic diagram of the data processing flow of the second AAU provided in an embodiment of the present invention.

[0211] With the aforementioned Figure 8 In comparison, the above Fig. 9B Before AC processing, the received compressed frequency domain data is also decompressed, so that the frequency domain data generated by the BBU can be obtained.

[0212] As can be seen from the above, the data received by the AAU and transmitted by the BBU through the CPRI interface is the compressed frequency domain data obtained by compressing the frequency domain data. Compared with the original frequency domain data, the data volume of the compressed frequency domain data is further reduced, so the data volume transmitted between the BBU and the AAU through the CPRI interface is also further reduced. In addition, before converting the frequency domain data into time domain data, the AAU first decompresses the compressed frequency domain data, so the data compression processing of the frequency domain data by the BBU does not affect the data processing process of the AAU.

[0213] Corresponding to the aforementioned data transmission method applied to the BBU and the data transmission method applied to the AAU, the embodiment of the present invention further provides a base station, see Fig.10 , is a schematic diagram of the structure of a base station provided in an embodiment of the present invention, wherein the BBU 1001 and the AAU 1002:

[0214] The BBU 1001 is used to obtain data to be transmitted and a carrier number configuration; perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing; and send the frequency domain data and the carrier number configuration to the AAU 1002 through the CPRI interface;

[0215] The AAU1002 is used to receive the frequency domain data and carrier number configuration sent by the BBU1001 through the CPRI interface; convert the frequency domain data into time domain data according to the carrier number configuration; and perform digital intermediate frequency and radio frequency processing on the time domain data.

[0216] As can be seen from the above, after the BBU performs baseband processing on the data to be transmitted, the frequency domain data generated by carrier aggregation can be obtained, and the data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing process and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided by the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing process of the AAU.

[0217] In one embodiment of the present invention, the BBU 1001 is specifically used for:

[0218] Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process;

[0219] Performing bit-level data processing on the first data to obtain second data;

[0220] The second data is subjected to symbol-level data processing to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration.

[0221] In one embodiment of the present invention, the BBU 1001 is further used to perform data compression processing on the frequency domain data using a preset compression algorithm to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data;

[0222] The BBU 1001 is specifically used to send the compressed frequency domain data and the carrier number configuration to the AAU 1002 through the CPRI interface;

[0223] The AAU 1002 is specifically used to receive the compressed frequency domain data and carrier number configuration sent by the BBU 1001 through the CPRI interface;

[0224] The AAU 1002 is further used to adopt a preset decompression algorithm corresponding to the compression algorithm to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

[0225] As can be seen from the above, before sending the frequency domain data to the AAU, the BBU also performs data compression on the frequency domain data, thereby reducing the data volume of the frequency domain data and obtaining compressed frequency domain data with a smaller data volume. Then, by sending the compressed frequency domain data to the AAU through the data baseband interface, the data volume transmitted between the BBU and the AAU through the CPRI interface can be further reduced, and the transmission bandwidth requirements of the CPRI interface can be further reduced. In addition, before converting the frequency domain data into time domain data, the AAU first performs data decompression on the compressed frequency domain data, so the data compression of the frequency domain data by the BBU does not affect the data processing process of the AAU.

[0226] In one embodiment of the present invention, the BBU1001 is specifically used to perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between the data amounts meets the preset ratio.

[0227] From the above, it can be seen that in the embodiment of the present invention, the BBU can control the data volume of each frequency domain data generated according to a preset ratio. Since the data volume of each frequency domain data generated is different, the data volume of data transmitted in each cell of the base station can be different, and the base station can control the data volume of data transmitted in different cells.

[0228] In one embodiment of the present invention, the BBU 1001 is specifically configured to obtain the preset ratio in the following manner:

[0229] Obtaining cell information of each cell of the base station of the BBU 1001 and the AAU 1002, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell;

[0230] According to the cell information of each cell, the ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio.

[0231] As can be seen from the above, the preset ratio between the data volume of the frequency domain data corresponding to each cell is determined by the current data transmission situation of each cell. As the data transmission situation of the above cells changes, the value of the above preset ratio will also change dynamically. Therefore, the above BBU can dynamically allocate the data volume of the frequency domain data corresponding to each cell based on the data transmission situation of the cell. When the data transmission situation of the cell is good, the data volume of the frequency domain data corresponding to the cell can be increased accordingly to make full use of the data transmission resources of the cell. On the contrary, when the data transmission situation of the cell is poor, the data volume of the frequency domain data corresponding to the cell can be reduced accordingly to reduce the data transmission pressure of the cell. Thereby, normal data transmission of each cell can be maintained.

[0232] In one embodiment of the present invention, the BBU 1001 is specifically configured to determine the ratio between the data amounts of the frequency domain data corresponding to each cell as the preset ratio by at least one of the following methods:

[0233] The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0234] The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0235] According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

[0236] In one embodiment of the present invention, the AAU 1002 is further used for:

[0237] Performing AC processing on the frequency domain data;

[0238] and / or

[0239] A cyclic prefix is ​​added to the time domain data.

[0240] Corresponding to the aforementioned data transmission method applied to the BBU, an embodiment of the present invention further provides a data transmission device applied to the BBU.

[0241] It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0242] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0243] See also Fig.11 , is a structural diagram of a first data transmission device provided by an embodiment of the present invention, which is applied to a BBU, and the device includes:

[0244] Configuration acquisition module 1101, used to obtain data to be transmitted and carrier number configuration;

[0245] The baseband processing module 1102 is used to perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing;

[0246] The data sending module 1103 is used to send the frequency domain data and the carrier number configuration to the AAU through the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

[0247] As can be seen from the above, after the BBU performs baseband processing on the data to be transmitted, the frequency domain data generated by carrier aggregation can be obtained, and the data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-bandwidth data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station.

[0248] In one embodiment of the present invention, the baseband processing module 1102 is specifically used for:

[0249] Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process;

[0250] Performing bit-level data processing on the first data to obtain second data;

[0251] The second data is subjected to symbol-level data processing to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration.

[0252] In one embodiment of the present invention, the above device further includes:

[0253] A data compression module, used to perform data compression processing on the frequency domain data using a preset compression algorithm to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data;

[0254] The data sending module 1103 is specifically used for:

[0255] The compressed frequency domain data and the carrier number configuration are sent to the AAU via the CPRI interface.

[0256] As can be seen from the above, before sending the frequency domain data to the AAU, the BBU also performs data compression on the frequency domain data, thereby reducing the data volume of the frequency domain data and obtaining compressed frequency domain data with a smaller data volume. Then, the compressed frequency domain data is sent to the AAU through the data baseband interface, which can further reduce the data volume transmitted between the BBU and the AAU through the CPRI interface and further reduce the transmission bandwidth requirements of the CPRI interface.

[0257] In one embodiment of the present invention, the baseband processing module 1102 is specifically configured to:

[0258] Baseband processing is performed on the data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between data amounts meets the preset ratio.

[0259] From the above, it can be seen that in the embodiment of the present invention, the BBU can control the data volume of each frequency domain data generated according to a preset ratio. Since the data volume of each frequency domain data generated is different, the data volume of data transmitted in each cell of the base station can be different, and the base station can control the data volume of data transmitted in different cells.

[0260] In one embodiment of the present invention, the preset ratio is obtained by the following ratio obtaining module, and the ratio obtaining module includes:

[0261] An information acquisition submodule, used to obtain cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission of the terminal in the cell, and load information of the cell;

[0262] The ratio determination submodule is used to determine the ratio between the data amounts of the frequency domain data corresponding to each cell according to the cell information of each cell, as a preset ratio.

[0263] As can be seen from the above, the preset ratio between the data volume of the frequency domain data corresponding to each cell is determined by the current data transmission situation of each cell. As the data transmission situation of the above cells changes, the value of the above preset ratio will also change dynamically. Therefore, the above BBU can dynamically allocate the data volume of the frequency domain data corresponding to each cell based on the data transmission situation of the cell. When the data transmission situation of the cell is good, the data volume of the frequency domain data corresponding to the cell can be increased accordingly to make full use of the data transmission resources of the cell. On the contrary, when the data transmission situation of the cell is poor, the data volume of the frequency domain data corresponding to the cell can be reduced accordingly to reduce the data transmission pressure of the cell. Thereby, normal data transmission of each cell can be maintained.

[0264] In one embodiment of the present invention, the ratio determination submodule is specifically used for:

[0265] The ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio by at least one of the following methods:

[0266] The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0267] The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells;

[0268] According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

[0269] Corresponding to the aforementioned data transmission method applied to the BBU, an embodiment of the present invention further provides a data transmission device applied to the AAU.

[0270] See also Fig.12 , is a schematic diagram of the structure of a second data transmission device provided in an embodiment of the present invention, which is applied to AAU, and the device includes:

[0271] The data receiving module 1201 is used to receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface;

[0272] A time domain conversion module 1202, configured to convert the frequency domain data into time domain data according to the carrier number configuration;

[0273] The digital processing module 1203 is used to perform digital intermediate frequency and radio frequency processing on the time domain data.

[0274] As can be seen from the above, the data received by the AAU and transmitted by the BBU through the CPRI interface is frequency domain data. Since the amount of frequency domain data is usually lower than that of time domain data, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided by the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing of the AAU.

[0275] In one embodiment of the present invention, the data receiving module 1201 is specifically used for:

[0276] receiving compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface, wherein the compressed frequency domain data is data obtained by the BBU performing data compression processing on the frequency domain data using a preset compression algorithm, and the compression algorithm is an algorithm for reducing the number of bits used to represent each data;

[0277] The above device also includes:

[0278] The data decompression module is used to adopt a preset decompression algorithm corresponding to the compression algorithm to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

[0279] As can be seen from the above, the data received by the AAU and transmitted by the BBU through the CPRI interface is the compressed frequency domain data obtained by compressing the frequency domain data. Compared with the original frequency domain data, the data volume of the compressed frequency domain data is further reduced, so the data volume transmitted between the BBU and the AAU through the CPRI interface is also further reduced. In addition, before converting the frequency domain data into time domain data, the AAU first decompresses the compressed frequency domain data, so the data compression processing of the frequency domain data by the BBU does not affect the data processing process of the AAU.

[0280] In one embodiment of the present invention, the above device further includes:

[0281] The AC processing module performs AC processing on the frequency domain data.

[0282] and / or

[0283] The prefix processing module is used to add a cyclic prefix to the time domain data.

[0284] In another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned data transmission methods applied to a BBU are implemented.

[0285] When executing the computer program stored in the computer-readable storage medium provided by the embodiment of the present invention to implement the data transmission process applied to the BBU, the above-mentioned BBU will perform baseband processing on the data to be transmitted, and can obtain the frequency domain data generated by carrier aggregation. The data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-bandwidth data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station.

[0286] In another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned data transmission methods applied to AAU are implemented.

[0287] When executing the computer program stored in the computer-readable storage medium provided by the embodiment of the present invention to implement the data transmission process applied to the AAU, the data received by the above-mentioned AAU and transmitted by the BBU through the CPRI interface is frequency domain data. Since the amount of frequency domain data is usually lower than the amount of time domain data, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing process and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided by the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing process of the AAU.

[0288] In another embodiment of the present invention, a computer program product including instructions is provided. When the computer program product is executed on a computer, the computer executes any one of the data transmission methods applied to the BBU in the above embodiments.

[0289] When executing the computer program provided in the embodiment of the present invention to implement the data transmission process applied to the BBU, the above-mentioned BBU will perform baseband processing on the data to be transmitted, and can obtain frequency domain data generated by carrier aggregation. The data sent by the BBU to the AAU through the CPRI interface is frequency domain data. Under normal circumstances, the amount of frequency domain data is lower than the amount of time domain data. Therefore, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station.

[0290] In another embodiment of the present invention, a computer program product including instructions is provided, which, when executed on a computer, enables the computer to execute any of the data transmission methods applied to AAU in the above embodiments.

[0291] When executing the computer program provided in the embodiment of the present invention to implement the data transmission process applied to AAU, the data received by the above-mentioned AAU and transmitted by the BBU through the CPRI interface is frequency domain data. Since the amount of frequency domain data is usually lower than the amount of time domain data, compared with the prior art in which the BBU sends baseband time domain data to the AAU, the BBU converts the data to be transmitted into frequency domain data before sending it, which can reduce the amount of data transmitted between the BBU and the AAU through the CPRI interface, thereby reducing the transmission bandwidth requirements of the CPRI interface. In this way, ultra-wideband data transmission between the BBU and the AAU can be achieved, which can improve the performance of the base station. In addition, the AAU converts the received frequency domain data into time domain data in the subsequent processing process and then continues to perform digital intermediate frequency and radio frequency processing. Therefore, the solution provided in the embodiment of the present invention does not affect the subsequent digital intermediate frequency and radio frequency processing process of the AAU.

[0292] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0293] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0294] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the base station, device, storage medium and computer program embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0295] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A data transmission method, characterized in that: Applied to a baseband processing unit BBU, the method comprises: Obtain data to be transmitted and configuration of the number of carriers; Performing baseband processing on the data to be transmitted, obtaining frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between the data amounts meets the preset ratio; obtaining the preset ratio by the following method: obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: the spectrum efficiency of the cell, the transmission rate of the terminal for data transmission in the cell, and the load information of the cell; determining the ratio between the data amounts of the frequency domain data corresponding to each cell according to the cell information of each cell as the preset ratio; The frequency domain data and the carrier number configuration are sent to the active antenna processing unit AAU through the common public radio interface CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

2. The method according to claim 1, characterized in that The performing baseband processing on the data to be transmitted to obtain frequency domain data generated by performing carrier aggregation according to the carrier number configuration during the baseband processing, wherein the ratio between data amounts meets a preset ratio, includes: Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process; Performing bit-level data processing on the first data to obtain second data; The second data is subjected to symbol-level data processing to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration and in which a ratio between data amounts meets a preset ratio.

3. The method according to claim 1, characterized in that: After baseband processing is performed on the data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between data amounts meets the preset ratio, the method further includes: Using a preset compression algorithm to perform data compression processing on the frequency domain data to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data; The sending the frequency domain data and the carrier number configuration to the AAU through the CPRI interface includes: The compressed frequency domain data and the carrier number configuration are sent to the AAU via the CPRI interface.

4. The method according to claim 1, characterized in that: The determining, according to the cell information of each cell, a ratio between the data amounts of the frequency domain data corresponding to each cell as a preset ratio includes: The ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio by at least one of the following methods: The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells; The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells; According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

5. A data transmission method, characterized in that: Applied to AAU, the method comprises: The frequency domain data and the carrier number configuration sent by the BBU are received through the CPRI interface, wherein the frequency domain data is generated by the BBU in the following manner: baseband processing is performed on the data to be transmitted, and frequency domain data generated by carrier aggregation according to the carrier number configuration in the baseband processing process, and the ratio between the data amounts meets the preset ratio; the BBU obtains the preset ratio in the following manner: cell information of each cell of the base station of the BBU and the AAU is obtained, wherein the cell information includes at least one of the following information: the spectrum efficiency of the cell, the transmission rate of the terminal for data transmission in the cell, and the load information of the cell; according to the cell information of each cell, the ratio between the data amounts of the frequency domain data corresponding to each cell is determined as the preset ratio; Converting the frequency domain data into time domain data according to the carrier number configuration; The time domain data is subjected to digital intermediate frequency and radio frequency processing.

6. The method according to claim 5, characterized in that The receiving of frequency domain data and carrier number configuration sent by the BBU through the CPRI interface includes: receiving compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface, wherein the compressed frequency domain data is data obtained by the BBU performing data compression processing on the frequency domain data using a preset compression algorithm, and the compression algorithm is an algorithm for reducing the number of bits used to represent each data; Before converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes: A preset decompression algorithm corresponding to the compression algorithm is used to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

7. The method according to claim 5 or 6, characterized in that: Before converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes: Performing antenna calibration AC processing on the frequency domain data; and / or After converting the frequency domain data into time domain data according to the carrier number configuration, the method further includes: A cyclic prefix is ​​added to the time domain data.

8. A base station, characterized in that: The base station includes a BBU and an AAU: The BBU is used to obtain data to be transmitted and the configuration of the number of carriers; Performing baseband processing on the data to be transmitted to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, in which the ratio between data amounts meets a preset ratio; and sending the frequency domain data and the carrier number configuration to the AAU through the CPRI interface; The preset ratio is obtained by: obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell; determining, according to the cell information of each cell, a ratio between data volumes of frequency domain data corresponding to each cell as the preset ratio; The AAU is used to receive frequency domain data and carrier number configuration sent by the BBU through the CPRI interface; convert the frequency domain data into time domain data according to the carrier number configuration; and perform digital intermediate frequency and radio frequency processing on the time domain data.

9. The base station according to claim 8, characterized in that The BBU is specifically used for: Performing baseband processing on the data to be transmitted to obtain first data after L2 layer processing, which is generated by performing carrier aggregation according to the carrier number configuration in the L2 layer processing process; Performing bit-level data processing on the first data to obtain second data; The second data is subjected to symbol-level data processing to obtain frequency domain data generated by carrier aggregation according to the carrier number configuration and in which a ratio between data amounts meets a preset ratio.

10. The base station according to claim 8, characterized in that The BBU is further used to perform data compression processing on the frequency domain data using a preset compression algorithm to obtain compressed frequency domain data, wherein the compression algorithm is: an algorithm for reducing the number of bits used to represent each data; The BBU is specifically used to send the compressed frequency domain data and the carrier number configuration to the AAU through the CPRI interface; The AAU is specifically used to receive the compressed frequency domain data and carrier number configuration sent by the BBU through the CPRI interface; The AAU is further used to adopt a preset decompression algorithm corresponding to the compression algorithm to perform data decompression processing on the compressed frequency domain data to obtain frequency domain data.

11. The base station according to claim 8, characterized in that The BBU is specifically used to determine the ratio between the data amounts of the frequency domain data corresponding to each cell as the preset ratio by at least one of the following methods: The ratio between the spectrum efficiencies of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells; The ratio between the transmission rates of the cells is determined as the ratio between the data volumes of the frequency domain data corresponding to the cells; According to the rule that the higher the load of a cell, the lower the data volume of the frequency domain data corresponding to the cell, the ratio between the data volumes of the frequency domain data corresponding to each cell is determined.

12. The base station according to any one of claims 8 to 10, characterized in that: The AAU is also used to: Performing AC processing on the frequency domain data; and / or A cyclic prefix is ​​added to the time domain data.

13. A data transmission device, characterized in that: Applied to BBU, the device comprises: A configuration acquisition module is used to obtain the data to be transmitted and the number of carrier configurations; A baseband processing module, configured to perform baseband processing on the data to be transmitted, and obtain frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, wherein the ratio between data volumes meets a preset ratio; the preset ratio is obtained by: obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: spectrum efficiency of the cell, transmission rate of data transmission performed by the terminal in the cell, and load information of the cell; and determining, according to the cell information of each cell, a ratio between data volumes of the frequency domain data corresponding to each cell as the preset ratio; The data sending module is used to send the frequency domain data and the carrier number configuration to the AAU through the CPRI interface, so that the AAU processes the frequency domain data based on the carrier number configuration.

14. A data transmission device, characterized in that: Applied to AAU, the device comprises: A data receiving module, configured to receive frequency domain data and carrier number configuration sent by a BBU through a CPRI interface, wherein the frequency domain data is generated by the BBU in the following manner: performing baseband processing on the data to be transmitted, and obtaining frequency domain data generated by carrier aggregation according to the carrier number configuration during the baseband processing, and the ratio between data amounts meets a preset ratio; the BBU obtains the preset ratio in the following manner: obtaining cell information of each cell of the base station of the BBU and the AAU, wherein the cell information includes at least one of the following information: the spectrum efficiency of the cell, the transmission rate of data transmission by the terminal in the cell, and the load information of the cell; according to the cell information of each cell, determining the ratio between the data amounts of the frequency domain data corresponding to each cell as the preset ratio; A time domain conversion module, configured to convert the frequency domain data into time domain data according to the carrier number configuration; The digital processing module is used to perform digital intermediate frequency and radio frequency processing on the time domain data.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method steps described in any one of claims 1-4 or 5-7 are implemented.

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