A method, device, system, equipment and medium for transmitting front-end data

Abstract

The present invention discloses a forward transmission data transmission method, device, system, equipment and medium, the method comprising: determining whether CSI-RS data compression is required according to the forward transmission data to be transmitted and the number of channels of the forward transmission interface, wherein the distributed unit is connected to the wireless unit through the forward transmission interface, and the forward transmission data to be transmitted includes at least the first CSI-RS data of K initial CSI-RS ports; when it is determined that CSI-RS data compression is required, compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of M target CSI-RS ports, wherein M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data; transmitting the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the forward transmission interface. The method provided by the present invention can solve the problem that data transmission cannot be completed at the same time because the number of ports of the distributed unit DU exceeds the number of ports of the wireless unit RU.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular to a method, device, system, equipment and medium for transmitting fronthaul data. Background Art

[0002] In the central radio access network (C-RAN: Centralized-RAN), the distributed unit (DU, Distributed Unit) and the radio unit (RU: Radio Unit) are connected through the fronthaul interface.

[0003] Among them, the number of channels of the fronthaul interface usually matches the number of channels of the RU, and the number of channels of the DU refers to the number of logical antenna ports that it can handle. According to the 3GPP protocol, the number of CSI-RS (Channel State Information Reference Signal) ports supported by the DU can be 16, 24, or 32, and the number of channels of the RU is set according to the manufacturer, and some manufacturers need to receive data with port granularity on the DU side. Therefore, when the number of CSI-RS ports on the DU side is 16 and the number of channels supported on the RU side is 8, the DU cannot simultaneously send data of more than 8 CSI-RS ports to the RU through the fronthaul interface. In summary, there is an urgent need for a method that can support fronthaul data transmission when the number of CSI-RS ports on the DU side is greater than the number of channels on the RU side. Summary of the invention

[0004] The present invention provides a forward data transmission method, device, system, equipment and medium, aiming to effectively solve the above technical problems.

[0005] According to a first aspect of the present invention, the present invention provides a fronthaul data transmission method performed by a distributed unit in a wireless communication system, comprising:

[0006] Determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the distributed unit and the wireless unit are connected through the forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports;

[0007] When it is determined that CSI-RS data compression is required, compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports, where M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data;

[0008] The second CSI-RS data of the M target CSI-RS ports are transmitted to the wireless unit through the fronthaul interface.

[0009] According to a second aspect of the present invention, the present invention further provides a fronthaul data transmission method performed by a wireless unit in a wireless communication system, comprising:

[0010] Receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data;

[0011] The distributed unit is connected to the wireless unit via a fronthaul interface, M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data.

[0012] According to a third aspect of the present invention, the present invention further provides a fronthaul data transmission device, the device comprising a distributed unit in a wireless communication system, the distributed unit comprising:

[0013] A compression determination module, used to determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the distributed unit and the wireless unit are connected through the forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports;

[0014] A data compression module, configured to compress the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports when it is determined that data compression is required, wherein M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data;

[0015] The data sending module is used to transmit the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface.

[0016] According to a fourth aspect of the present invention, the present invention further provides a forward transmission data transmission device, the device comprising a wireless unit in a wireless communication system, the wireless unit comprising:

[0017] A receiving and decompression module, configured to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data;

[0018] The distributed unit is connected to the wireless unit via a fronthaul interface, M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data.

[0019] According to a fifth aspect of the present invention, the present invention further provides a wireless communication system, comprising a distributed unit, a wireless unit and a fronthaul interface, wherein the fronthaul interface is used to connect the distributed unit and the wireless unit;

[0020] The distributed units include:

[0021] A compression determination module, used to determine whether CSI-RS data compression is required according to the forward transmission data to be transmitted and the number of channels of the forward transmission interface, wherein the forward transmission data to be transmitted includes at least the first CSI-RS data of K initial CSI-RS ports;

[0022] A data compression module, configured to compress the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports when it is determined that CSI-RS data compression is required, wherein M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data;

[0023] A data sending module, used for transmitting the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface;

[0024] The wireless unit includes:

[0025] The receiving and decompression module is used to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data.

[0026] According to a sixth aspect of the present invention, the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the steps of any one of the above methods.

[0027] According to a seventh aspect of the present invention, the present invention further provides a storage medium, in which a plurality of instructions are stored, and the instructions are suitable for being loaded by a processor to execute the steps of any of the above methods.

[0028] Through one or more of the above embodiments of the present invention, at least the following technical effects can be achieved: when it is determined that CSI-RS data compression is required, the first CSI-RS data of the K initial CSI-RS ports are compressed into the second CSI-RS data of the M target CSI-RS ports, so that the distributed unit DU can transmit the first CSI-RS data of the K initial CSI-RS ports to the wireless unit RU through the forward interface at the same time, and there will be no problem that the data transmission cannot be completed at the same time because the number of ports of the distributed unit DU exceeds the number of ports of the wireless unit RU. At the same time, there is no need to replace the hardware of the wireless unit RU, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0030] Figure 1 One of the flow charts of the forward transmission data transmission method provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of section field information provided by an embodiment of the present invention;

[0032] Figure 3 The second flowchart of the forward transmission data transmission method provided by the embodiment of the present invention;

[0033] Figure 4 A schematic diagram of resource element mask information provided by an embodiment of the present invention;

[0034] Figure 5 Flow chart 3 of the forward data transmission method provided by an embodiment of the present invention;

[0035] Figure 6 One of the initial CSI-RS port schematic diagrams provided in an embodiment of the present invention;

[0036] Figure 7 One of the target CSI-RS port schematic diagrams provided in an embodiment of the present invention;

[0037] Figure 8 The second schematic diagram of the initial CSI-RS port provided by the embodiment of the present invention;

[0038] Fig. 9 This is the second schematic diagram of the target CSI-RS port provided by the embodiment of the present invention. DETAILED DESCRIPTION

[0039] The technical scheme in the embodiment of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0041] The following describes a method, device, system, equipment and medium for transmitting fronthaul data provided by the present invention in conjunction with the accompanying drawings.

[0042] Figure 1 One of the flowcharts of the forward transmission data transmission method provided by an embodiment of the present invention is as follows Figure 1 As shown, a method for fronthaul data transmission performed by a distributed unit in a wireless communication system comprises the following steps:

[0043] S101, determining whether CSI-RS data compression is required according to the forward transmission data to be transmitted and the number of channels of the forward transmission interface.

[0044] Among them, the distributed unit DU and the wireless unit RU are connected through a forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS (i.e., channel state information-reference signal) ports, and there are a total of K first CSI-RS data.

[0045] The number of ports of the distributed unit DU is the initial CSI-RS port number K, which can be 1, 2, 3, 8, 16, 24, 32, etc., and each initial CSI-RS port corresponds to a first CSI-RS data. The forward transmission interface can be CPRI, eCPRI, etc. The number of channels of the forward transmission interface is the number of ports that can be used normally in the wireless unit RU. When the number of ports of the wireless unit RU is 8 and they can all be used normally, the number of channels of the forward transmission interface is 8. At this time, if the initial CSI-RS port number K on the distributed unit DU side is 16, 24 or 32, etc., which is greater than 8, the distributed unit DU side cannot transmit the first CSI-RS data of 16, 24 or 32 ports to the wireless unit RU side through the forward transmission interface at the same time. Replacing the wireless unit RU so that the number of data channels it can support matches the distributed unit DU will increase costs. In order not to increase costs, the embodiment of the present invention can enable the compressed data to be transmitted to the wireless unit RU side at the same time by performing CSI-RS data compression on the distributed unit DU side.

[0046] In addition, when it is necessary to save the transmission channel of the fronthaul interface, the first CSI-RS data of the K initial CSI-RS ports on the distributed unit DU side may also be compressed to the CSI-RS data of the target number of ports.

[0047] In addition, in addition to the first CSI-RS data, the forward data to be sent also includes other channel data, such as physical downlink control channel data (PDCCH: Physical Downlink Control Channel), synchronization signal block channel data (SSB: Synchronization Signal Block), physical downlink shared channel data (PDSCH: Physical Downlink Shared Channel), physical uplink shared channel data (PUSCH: Physical Uplink Shared Channel), physical uplink control channel data (PUCCH: Physical Uplink Control Channel), etc.

[0048] S102: When it is determined that CSI-RS data compression is required, compress the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports.

[0049] Among them, K is the initial number of CSI-RS ports, M is the target number of CSI-RS ports, M is less than or equal to the number of channels and M is less than K. When M is equal to the number of channels, all channels in the fronthaul interface are used for data transmission; when M is less than the number of channels, only some of all channels in the fronthaul interface are used for data transmission, and the rest are idle.

[0050] Each target CSI-RS port corresponds to a second CSI-RS data, and the second CSI-RS data includes at least one first CSI-RS data. After the K first CSI-RS data need to be compressed into M second CSI-RS data, each target CSI-RS port corresponds to at least one first CSI-RS data.

[0051] In addition, when it is determined that CSI-RS data compression is not required, the first CSI-RS data of the K initial CSI-RS ports are directly transmitted to the wireless unit through the fronthaul interface.

[0052] S103, transmitting the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface. That is, the second CSI-RS data of one CSI-RS port is transmitted through one channel in the fronthaul interface, and the M second CSI-RS data are transmitted through M channels.

[0053] The forward transmission data transmission method provided by the embodiment of the present invention compresses the first CSI-RS data of K initial CSI-RS ports into the second CSI-RS data of M target CSI-RS ports when it is determined that CSI-RS data compression is required, so that the distributed unit DU can transmit the first CSI-RS data of the K initial CSI-RS ports to the wireless unit RU through the forward transmission interface at the same time, and the problem of not being able to complete data transmission at the same time because the number of ports of the distributed unit DU exceeds the number of ports of the wireless unit RU will not occur. At the same time, there is no need to replace the hardware of the wireless unit RU, saving costs.

[0054] In some embodiments of the present invention, when the initial number of CSI-RS ports K is greater than the number of channels, it is determined that CSI-RS data compression is required, and the target number of CSI-RS ports M is determined according to the number of channels. That is, when the initial number of CSI-RS ports K is greater than the number of channels of the fronthaul interface, the distributed unit DU cannot directly transmit the K first CSI-RS data to the wireless unit RU through the fronthaul interface. In this case, the K first CSI-RS data need to be compressed to meet the channel number limit of the fronthaul interface.

[0055] Furthermore, the forward data to be sent includes code division multiplexing group CDM group information, and the code division multiplexing group information includes the number of multiplexed CSI-RS ports and multiplexed time-frequency domain resource information, etc. The multiplexed CSI-RS ports specifically refer to which CSI-RS ports among the K initial CSI-RS ports use the same time-frequency domain resources and different orthogonal codes. Schematically, if there are 12 initial CSI-RS ports and every 4 CSI-RS ports use the same time-frequency domain resources and different orthogonal codes, then there are a total of 3 groups of code division multiplexing groups CDM groups, and the number of initial CSI-RS ports in each CDM group is the number of multiplexed CSI-RS ports. The multiplexed time-frequency domain resource information includes the time-frequency domain resource information, orthogonal codes, and port identification information used by different initial CSI-RS ports, etc.

[0056] When the number of multiplexed CSI-RS ports is obtained, the target number of CSI-RS ports M is greater than or equal to the number of multiplexed CSI-RS ports. Target CSI-RS port number M The number of channels of the forward transmission interface. After determining the value range of the target CSI-RS port number M, any value can be selected as M. If the value of M is smaller, each second CSI-RS data contains more first CSI-RS data, and the transmission pressure during the transmission process is greater, but the number of channels actually used to transmit data in the forward transmission interface is more economical; conversely, if the value of M is larger, each second CSI-RS data contains less first CSI-RS data, the data transmission pressure is smaller, and the number of channels actually used is greater.

[0057] It should be noted that when each of the K initial CSI-RS ports uses different time-frequency domain resources, the number of target CSI-RS ports M Number of channels on the fronthaul interface.

[0058] In some embodiments of the present invention, after obtaining the value range of the above-mentioned target CSI-RS port number M, it is also necessary to consider the number of channels required by other channel data in the forward data, and select the optimal value from the value range of M according to the number of channels required by the channel data.

[0059] Specifically, if the forward data to be sent also includes third data, and the third data is data corresponding to other downlink physical channels and / or physical signals other than the first CSI-RS data, then the target CSI-RS port number M is determined according to the maximum number of channels required for the third data.

[0060] Indicatively, the third data may be one or more combinations of PDCCH, PUCCH, PDSCH, PUSCH, etc. The data corresponding to different channels or physical signals usually have different data channel number requirements during transmission. For example, the data sent on PDCCH and synchronization signal block (SSB: Synchronization Signal Block) usually only needs to use one channel in the fronthaul interface, while the data sent on PDSCH needs to use up to 8 channels in the fronthaul interface. Therefore, in order to ensure that the data corresponding to other channels or physical signals can be transmitted normally, it is necessary to consider the maximum number of data channels required for other channels.

[0061] Based on this, the target CSI-RS port number M is determined according to the maximum number of channels required by the third data.

[0062] In an illustrative manner, if the forward data to be transmitted includes SSB data in addition to the first CSI-RS data, and the SSB data only needs to be transmitted using one channel, then in order to save the number of transmission channels, the number of multiplexed CSI-RS ports can be reduced. Target CSI-RS port number M The value closest to 1 in the range of the number of channels of the fronthaul interface is selected as M. If the number of multiplexed CSI-RS ports is 2 and the number of channels of the fronthaul interface is 8, the value range of M is 2. Target CSI-RS port number M 8, in order to be closer to the number of channels required for SSB data, 2 is selected as M. If the number of multiplexed CSI-RS ports is 3, the value range of M is 3 Target CSI-RS port number M 8. To approach 1, choose 3 as M.

[0063] For another example, if the forward data to be sent includes PDCCH data and PDSCH data in addition to the first CSI-RS data, assuming that PDCCH data only needs to use 1 channel for transmission and PDSCH data needs 5 channels for transmission, then the maximum number of channels required for PDCCH data and PDSCH data is 5, and the number of multiplexed CSI-RS ports is 5. Target CSI-RS port number M The value closest to 5 in the range of the number of channels of the fronthaul interface is selected as M. For example, when the number of multiplexed CSI-RS ports is 2 and the number of channels of the fronthaul interface is 8, the value range of M is 2. Target CSI-RS port number M 8. According to the number of channels required by PDSCH (5), M is finally taken as 5.

[0064] It should be noted that when the forward data to be sent only includes the first CSI-RS data, the multiplexed CSI-RS port number can be Target CSI-RS port number M An arbitrary value is taken as M from the number of channels of the fronthaul interface.

[0065] The forward transmission data transmission method provided by the embodiment of the present invention comprises: Target CSI-RS port number M M is determined within the range of the number of channels of the fronthaul interface, which not only saves the data transmission channel of the fronthaul interface, but also ensures that data of other channels can be transmitted normally without too much data transmission pressure.

[0066] In some embodiments of the present invention, the code division multiplexing group information also includes multiplexing time-frequency domain resource information, and the multiplexing time-frequency domain resource information is used to indicate the time-frequency domain resource information, orthogonal code information, etc. of the multiplexing CSI-RS port.

[0067] Compressing the first CSI-RS data of K initial CSI-RS ports into the second CSI-RS data of M target CSI-RS ports includes:

[0068] The first CSI-RS data of the K initial CSI-RS ports are compressed into the second CSI-RS data of the M target CSI-RS ports according to the multiplexed time-frequency domain resource information.

[0069] In this embodiment, when the first CSI-RS data of K initial CSI-RS ports are compressed into the second CSI-RS data of M target CSI-RS ports, the second CSI-RS data in the same target CSI-RS port includes multiple first CSI-RS data. In order to avoid the problem that time-frequency domain resource conflicts occur among these multiple first CSI-RS data, which results in the inability of the wireless unit RU side to recover the original first CSI-RS data, it is also necessary to determine which of the K initial CSI-RS ports' first CSI-RS data can be compressed on the same target CSI-RS port based on the multiplexed time-frequency domain resource information, so as to avoid the problem that time-frequency domain resource conflicts occur among the multiple first CSI-RS data on the same target CSI-RS port after compression.

[0070] Schematically, if there are first CSI-RS data of 8 initial CSI-RS ports, the identifiers of the 8 initial CSI-RS ports are a, b, c, d, e, f, g, and h, respectively, and it is assumed that there are four code division multiplexing groups CDM groups of a and b, c and d, e and f, and g and h, then different initial CSI-RS ports in the same CDM group use the same time-frequency domain resources, and the time-frequency domain resources between different CDM groups are different. For example, the time-frequency domain resources of a and b are the same, but the time-frequency domain resources of a and c are different. On this basis, it is necessary to select the first CSI-RS data of the initial CSI-RS ports with different time-frequency domain resources for compression. In order to avoid time-frequency domain resource conflicts, the two first CSI-RS data of the initial CSI-RS port a and the initial CSI-RS port b cannot be compressed to the same CSI-RS port, but the first CSI-RS data on the initial CSI-RS port a can be compressed to the same CSI-RS port with one or more first CSI-RS data of the initial CSI-RS ports c, e and g to form the second CSI-RS data.

[0071] It should be noted that the target CSI-RS port is one of multiple initial CSI-RS ports. For example, when the first CSI-RS data on the initial CSI-RS port a and the first CSI-RS data on the initial CSI-RS ports c, e and g are compressed to the same CSI-RS port, the target CSI-RS port can be any one of the initial CSI-RS ports a, c, e and g.

[0072] In some embodiments of the present invention, the method for fronthaul data transmission performed by a distributed unit in a wireless communication system further includes:

[0073] The control plane information of each target CSI-RS port is generated according to the second CSI-RS data of the M target CSI-RS ports and sent to the wireless unit together with the second CSI-RS data. That is, the control plane information is generated according to the first CSI-RS data included in the second CSI-RS data, and there are a total of M control plane information, and each control plane information is transmitted to the wireless unit RU together with the second CSI-RS data through a data channel of the fronthaul interface.

[0074] Among them, the control plane information includes multiple section field information, the section field information includes section field identification information and resource element mask information, the section field identification information is used to calculate the number of first CSI-RS data included in the second CSI-RS data, and the resource element mask information is used to indicate the resource elements used by the first CSI-RS data.

[0075] Specifically, when the first CSI-RS data of multiple initial CSI-RS ports are compressed to one target CSI-RS port to form the second CSI-RS data of the target CSI-RS port, the section field information is generated according to the time-frequency domain resources used by each of the first CSI-RS data in the target CSI-RS port. Figure 2 As shown, a control plane information includes n section field information, and each section field information includes a section field identifier sectionID, a resource block identifier Rb, a symbol number increment symInc, a starting resource block startPrbc, a resource block number numPrbc, a resource element mask reMask, a symbol number numSymbol, an extension identifier ef, a beam identifier beamId, etc.

[0076] The multiple section field information of the same target CSI-RS port has the same information except for the resource element mask information, and the resource element mask information can indicate the different resource elements used by different initial CSI-RS ports in the same resource block. In schematic form, if there are only two section fields with section field identifier sectionID 1 in the section field information of a target CSI-RS port, it indicates that the first CSI-RS data before compression will be sent respectively in the two initial CSI-RS ports. Assuming that the resource element mask reMask of one section field in the section field information of the target CSI-RS port is (0 01 1 1 1 1 1 1 1 1 1), it indicates that from the 3rd resource element RE (Resource Element) to the 12th resource element RE are used by one of the two initial CSI-RS ports mentioned above; and the resource element mask reMask of another section field in the section field information of the target CSI-RS port is (1 1 0 0 0 0 0 0 0 0 0 0), it indicates that from the 1st resource element RE to the 2nd resource element RE are used by the other initial CSI-RS port of the two initial CSI-RS ports mentioned above.

[0077] In summary, the section field identification information in the section field information can calculate the number of first CSI-RS data of the current target CSI-RS port, and the resource element mask information can indicate the resource element RE used by different first CSI-RS data under the current target CSI-RS port. The wireless unit RU can determine how many first CSI-RS data the second CSI-RS data contains and the resource element RE used by each first CSI-RS data based on the section field identification information, and decompress the second CSI-RS data based on this to restore multiple first CSI-RS data.

[0078] It should be noted that, when the first CSI-RS data does not need to be compressed, K control plane information is generated according to the first CSI-RS data, and is directly transmitted to the wireless unit RU together with the first CSI-RS data.

[0079] In some embodiments of the present invention, when the target CSI-RS port number M is an even number, each second CSI-RS data includes The first CSI-RS data. Since the value of the initial CSI-RS port number K is 1, 2, 3, 8, 16, 24, 32, etc., and no data compression is required when K is 1, therefore, when M is an even number, is an integer, and each target CSI-RS port corresponds to The first CSI-RS data.

[0080] When the number of target CSI-RS ports M is an odd number, M-1 second CSI-RS data in the M second CSI-RS data include The first CSI-RS data and the remaining second CSI-RS data include the remaining first CSI-RS data; or, the M-1 second CSI-RS data include The first CSI-RS data.

[0081] That is to say, when M is an odd number, is a non-integer. In one case, M-1 of the M second CSI-RS data include The first CSI-RS data, the remaining second CSI-RS data includes the remaining first CSI-RS data, that is, 1st CSI-RS data. Schematically, if K is 8 and M is 3, then 2 of the second CSI-RS data include 3 first CSI-RS data, and the remaining 1 second CSI-RS data includes 2 first CSI-RS data. In another case, only M-1 of the M target CSI-RS ports are used, and the remaining 1 is not used, so that the second CSI-RS data of the M-1 target CSI-RS ports includes Illustratively, if K is 8 and M is 3, only two target CSI-RS ports are used, and the second CSI-RS data of each target CSI-RS port includes four first CSI-RS data.

[0082] In some embodiments of the present invention, determining whether CSI-RS data compression is required according to the forward transmission data to be transmitted and the number of channels of the forward transmission interface includes:

[0083] When the initial CSI-RS port number K is less than or equal to the number of channels and the forward data to be sent also includes third data, it is determined that CSI-RS data compression is required, and the target CSI-RS port number M is determined based on the maximum number of channels required for the third data.

[0084] In this embodiment, in addition to the need for data compression in the case where K first CSI-RS data cannot be transmitted to the wireless unit RU at the same time because the initial CSI-RS port number K is greater than the number of channels, CSI-RS data compression can also be performed to save the number of channels.

[0085] Specifically, when the initial CSI-RS port number K is less than or equal to the number of channels, if the forward data to be sent also includes the third data, the K first CSI-RS data can be compressed to save the number of channels. Among them, the target CSI-RS port number M is less than the initial CSI-RS port number K. Similarly, if the forward data to be sent also includes code division multiplexing group information, the target CSI-RS port number M also needs to be greater than or equal to the number of multiplexed CSI-RS ports. Within the above range, based on the maximum number of channels required by the third data, it can not only meet the data transmission requirements of other channels but also maximize data compression.

[0086] Indicatively, if the initial CSI-RS port number K is 4, the number of channels is 4, and the forward data to be sent includes PDCCH data in addition to the first CSI-RS data, the number of channels required for the PDCCH data is 1, and there is no code division multiplexing group information, then the value range of M is M 4. According to the number of channels 1 required for PDCCH data, M is taken as 1, that is, 4 first CSI-RS data need to be compressed into one second CSI-RS data.

[0087] For another example, the forward data to be sent includes PDCCH data and PDSCH data in addition to the first CSI-RS data. The number of channels required for the PDCCH data is 1, the number of channels required for the PDSCH data is 2, and there is no code division multiplexing group information. The value range of M is M 4. According to the number of channels 2 required for PDSCH data, M is taken as 2. It is necessary to compress 4 first CSI-RS data into 2 second CSI-RS data, and each second CSI-RS data includes 2 first CSI-RS data.

[0088] For another example, the forward data to be sent includes PDCCH data and PDSCH data in addition to the first CSI-RS data. The number of channels required for the PDCCH data is 1, and the number of channels required for the PDSCH data is 3. There are 2 code division multiplexing groups in total. The number of multiplexed CSI-RS ports in each code division multiplexing group is 2. At this time, the value range of M is 2. M 4. According to the number of channels 3 required for PDSCH data, M is taken as 3. It is necessary to compress 4 first CSI-RS data into 3 second CSI-RS data. Among the 3 second CSI-RS data, 2 second CSI-RS data only contain one first CSI-RS data, and the remaining second CSI-RS data contains 2 first CSI-RS data. Or only 2 of the 3 target CSI-RS ports are used. In this case, it is necessary to compress 4 first CSI-RS data into 2 second CSI-RS data, and each second CSI-RS data includes 2 first CSI-RS data.

[0089] Figure 3 The second flowchart of the method for fronthaul data transmission provided by the embodiment of the present invention is as follows Figure 3 As shown, a forward transmission data transmission method performed by a wireless unit in a wireless communication system comprises the following steps:

[0090] S301, receiving, through a fronthaul interface, second CSI-RS data of M target CSI-RS ports sent by a distributed unit and decompressing the data to obtain K first CSI-RS data.

[0091] Among them, the distributed unit and the wireless unit are connected through a fronthaul interface, M is the target CSI-RS port, K ​​is the initial CSI-RS port number, M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data is compressed data of multiple first CSI-RS data.

[0092] Specifically, the wireless unit also receives control plane information sent by the distributed unit, the control plane information includes multiple section field information, the section field information includes section field identification information and resource element mask information, the section field identification information is used to calculate the number of first CSI-RS data included in the second CSI-RS data, and the resource element mask information is used to indicate the resource elements used by the first CSI-RS data.

[0093] Decompressing the second CSI-RS data of each target CSI-RS port specifically includes:

[0094] In the case where at least two section field identification information are identical, the second CSI-RS data is decompressed according to the resource element mask information corresponding to the identical section field identification information.

[0095] Specifically, the control plane information of each target CSI-RS port is detected to determine whether there are section fields with the same section field identification information among the multiple section field information contained in the control plane information, and if there are section fields with the same section field identification information, the second CSI-RS data is decompressed using the resource element mask information in the section field to obtain multiple first CSI-RS data. The number of the same section field identification information is the number of the first CSI-RS data.

[0096] like Figure 4 As shown, when M is an even number, the M target CSI-RS ports all have The resource element mask information in each section field is different. Specifically, the resource element mask information in the first target CSI-RS port is different. The mask information of each resource element is reMask_1_1, reMask_1_2, … reMask_1_ , the second target CSI-RS port The mask information of each resource element is reMask_2_1, reMask_2_2, … reMask_2_ , ..., under the Mth target CSI-RS port The mask information of each resource element is reMask_M_1, reMask_M_2, … reMask_M_ .

[0097] In addition, if there is no section field with the same section field identification information, there is no need to decompress the second CSI-RS data to determine that the second CSI-RS data only includes one first CSI-RS data.

[0098] Figure 5 The third flowchart of the method for fronthaul data transmission provided by the embodiment of the present invention is as follows: Figure 5 As shown, the forward transmission data transmission method includes the following steps:

[0099] S501, the distributed unit DU determines whether the K first CSI-RS data in the forward data to be sent need to be compressed. If the judgment is no, the first CSI-RS data is used as the data plane information and the process goes to step S503; if the judgment is yes, the process goes to step S502.

[0100] S502, the distributed unit DU compresses K first CSI-RS data into M second CSI-RS data, uses the second CSI-RS data as data plane information, and proceeds to step S503.

[0101] S503, the distributed unit DU generates control plane information according to the first CSI-RS data or the first CSI-RS data in the second CSI-RS data, sends the control plane information together with the data plane information to the radio unit RU, and then proceeds to S504.

[0102] S504, if the wireless unit RU determines that the control plane information contains at least two section fields with the same section field identification information, it determines that the second CSI-RS data needs to be decompressed, and enters step S505; if it is determined that all section field identification information in the control plane information is different, no decompression is required, and enters step S506.

[0103] S505: The radio unit RU decompresses the second CSI-RS data according to the resource element mask information reMask in the section field where the same section field identifier is located, to obtain multiple first CSI-RS data.

[0104] S506, the radio unit RU extracts the control plane information and the first CSI-RS data in the data plane information, and then enters the end state.

[0105] In another embodiment of the present invention, Figure 6 As shown, assuming that the forward data to be sent only includes the first CSI-RS data, the number of initial CSI-RS ports K is 12, the number of channels of the forward interface is 8, there are a total of 3 code division multiplexing groups CDM group, each CDM group includes 4 initial CSI-RS ports using the same time-frequency domain resources and different orthogonal codes, based on this, the value range of the target CSI-RS port number M is [4,8], and in this embodiment, M is 4. Among them, the orthogonal code of the initial CSI-RS port 3000 is [+1, +1], [+1, +1], the orthogonal code of the initial CSI-RS port 3001 is [+1, -1], [+1, -1], the orthogonal code of the initial CSI-RS port 3002 is [+1, +1], [-1, -1], and the orthogonal code of the initial CSI-RS port 3003 is [+1, -1], [-1, +1].

[0106] According to the multiplexed time-frequency domain resource information, appropriate multiple first CSI-RS data are compressed together to form the second CSI-RS data. Specifically, since the time-frequency domain resources occupied by the CSI-RS on the initial CSI-RS ports 3000, 3001, 3002, and 3003 are the same, the four ports cannot be compressed into one port. Similarly, the initial CSI-RS ports 3004, 3005, 3006, and 3007 cannot be compressed on one port, and the initial CSI-RS ports 3008, 3009, 3010, and 3011 cannot be compressed on one port. The initial CSI-RS ports 3000, 3004, and 3008 use three groups of different time-frequency domain resources, so they can be compressed to the same port, specifically to any one of 3000, 3004, and 3008. Schematically, the first CSI-RS data of the initial CSI-RS ports 3000, 3004, and 3008 are compressed to 3000. At this time, the initial CSI-RS port 3000 is the target CSI-RS port. Similarly, the initial CSI-RS ports 3001, 3005, and 3009 are compressed to 3001, and 3001 is the target CSI-RS port; the initial CSI-RS ports 3002, 3006, and 3010 are compressed to 3002, and 3002 is the target CSI-RS port; ports 3003, 3007, and 3011 are compressed to 3003, and 3003 is the target CSI-RS port. The four second CSI-RS data are as follows: Figure 7 In other embodiments of the present invention, the initial CSI-RS ports 3000, 3005, and 3009 may be compressed to the same port, or the initial CSI-RS ports 3000, 3006, and 3010 may be compressed to the same port, which is not limited.

[0107] The corresponding control plane information C-plane is generated according to the second CSI-RS data of the target CSI-RS ports 3000, 3002, 3002 and 3003, and the four second CSI-RS data and the corresponding control plane information are sent on four data channels respectively. When the distributed unit DU sends the control plane information of the four channels to the radio unit RU, the section field information on each channel will be repeated three times. For example, the control plane information of the target CSI-RS port 3000 is sent on the first channel, which includes three section fields with the same section field identifier sectionId, and the resource element masks reMask in the three section fields are (0 0 1 1 0 0 00 0 0 0 0), (0 0 0 0 0 0 1 1 0 0 0 0), and (0 0 0 0 0 0 0 0 0 0 1 1), which indicates that the three first CSI-RS data in the second CSI-RS data use the 3rd and 4th resource elements RE, the 7th and 8th resource elements RE, and the 11th and 12th resource elements RE, respectively.

[0108] After the wireless unit RU receives the control plane information of each target CSI-RS port, it detects the section field in the control plane information and detects that three section fields with the same sectionId are obtained. Therefore, it is determined that the distributed unit has compressed the first CSI-RS data. Then, according to the reMask of the three section fields, the following is restored: Figure 6 The resource position of the first CSI-RS data is shown, and the corresponding first CSI-RS data is extracted according to the resource position.

[0109] In another embodiment of the present invention, Figure 8 As shown, it is assumed that the forward data to be transmitted includes the first CSI-RS data and PDCCH data, and the PDCCH data requires 1 channel for data transmission. The initial CSI-RS port number K is 8, and the channel number of the forward interface is 8. There are a total of 4 code division multiplexing groups CDM group, and each CDM group includes 2 initial CSI-RS ports using the same time-frequency domain resources and different orthogonal codes. Based on this, the value range of the target CSI-RS port number M is [2,8). In order to be closer to the channel number 1 required for PDCCH data, M is 2. Among them, the orthogonal code of the initial CSI-RS port 3000' is [+1, +1], and the orthogonal code of the initial CSI-RS port 3001' is [-1, +1].

[0110] Since the initial CSI-RS ports 3000' and 3001' occupy the same resources, these two initial CSI-RS ports cannot be compressed into one target CSI-RS. Similarly, initial CSI-RS ports 3002' and 3003' cannot be compressed, initial CSI-RS ports 3004' and 3005' cannot be compressed, and initial CSI-RS ports 3006' and 3007' cannot be compressed. However, the initial CSI-RS ports 3000', 3002', 3004', and 3006' use 4 sets of different time-frequency domain resources, so they can be compressed to the same port, for example, to port 3000'. At this time, the initial CSI-RS port 3000' is the target CSI-RS port. Similarly, ports 3001', 3003', 3005', and 3007' are compressed to port 3001', and the two second CSI-RS data are as follows. Fig. 9 In other embodiments of the present invention, the initial CSI-RS ports 3000', 3003', 3005', 3007' may be compressed to the same port, or the initial CSI-RS ports 3001', 3002', 3004', 3006' may be compressed to the same port, which is not limited.

[0111] The corresponding control plane information C-plane is generated according to the second CSI-RS data of the target CSI-RS ports 3000' and 3001', and the two second CSI-RS data and the corresponding control plane information are sent on two data channels respectively. When the distributed unit DU sends the control plane information of the two channels to the radio unit RU, the section field information on each channel will be repeated 4 times. For example, the control plane information of the target CSI-RS port 3000' is sent on the first channel, which includes 4 section fields with the same section field identifier sectionId, and the resource element masks reMask in the 4 section fields are (1 1 0 0 0 0 0 0 0 00 0), (0 0 0 1 1 0 0 0 0 0 0), (0 0 0 0 0 0 1 1 0 0 0 0), (0 0 0 0 0 0 0 01 1 0), which indicates that the 4 first CSI-RS data in the second CSI-RS data use the 1st and 2nd resource elements RE, the 4th and 5th resource elements RE, the 7th and 8th resource elements RE, and the 10th and 11th resource elements RE, respectively.

[0112] After the wireless unit RU receives the control plane information of each target CSI-RS port, it detects the section field in the control plane information and detects that four section fields with the same sectionId are obtained. Therefore, it is determined that the distributed unit has compressed the first CSI-RS data. Then, according to the reMask of the four section fields, the following is restored: Figure 8 The resource position of the first CSI-RS data is shown, and the corresponding first CSI-RS data is extracted according to the resource position.

[0113] In another embodiment of the present invention, a fronthaul data transmission device is further provided, the device comprising a distributed unit in a wireless communication system, the distributed unit comprising:

[0114] A compression determination module is used to determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the distributed unit and the wireless unit are connected through the forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports.

[0115] A data compression module is used to compress the first CSI-RS data of K initial CSI-RS ports into second CSI-RS data of M target CSI-RS ports when it is determined that CSI-RS data compression is required, wherein M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data.

[0116] The data sending module is used to transmit the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface.

[0117] The fronthaul data transmission device including the distributed unit in this embodiment corresponds to the fronthaul data transmission method performed by the distributed unit in the wireless communication system, and will not be described in detail here.

[0118] In another embodiment of the present invention, a forward transmission data transmission device is further provided, the device comprising a wireless unit in a wireless communication system, the wireless unit comprising:

[0119] The receiving and decompression module is used to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data.

[0120] The distributed unit is connected to the wireless unit via a fronthaul interface, M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data.

[0121] The fronthaul data transmission device including the wireless unit in this embodiment corresponds to the fronthaul data transmission method performed by the wireless unit in the wireless communication system, and will not be described in detail here.

[0122] In another embodiment of the present invention, a wireless communication system is further provided, the wireless communication system comprising a distributed unit, a wireless unit and a fronthaul interface, the fronthaul interface being used to connect the distributed unit and the wireless unit;

[0123] The distributed units include:

[0124] The compression determination module is used to determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports.

[0125] A data compression module is used to compress the first CSI-RS data of K initial CSI-RS ports into second CSI-RS data of M target CSI-RS ports when it is determined that CSI-RS data compression is required, wherein M is less than or equal to the number of channels and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data.

[0126] The data sending module is used to transmit the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface.

[0127] The wireless unit includes:

[0128] The receiving and decompression module is used to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data.

[0129] The distributed unit in this embodiment corresponds to the fronthaul data transmission method performed by the distributed unit in the wireless communication system, and the wireless unit corresponds to the fronthaul data transmission method performed by the wireless unit in the wireless communication system, which will not be repeated here.

[0130] Based on any of the above embodiments, another embodiment of the present invention further provides an electronic device, which may include: a processor, a communications interface, a memory, and a communication bus, wherein the processor, the communications interface, and the memory communicate with each other via the communication bus. The processor may call the logic instructions in the memory to execute the above-mentioned forward transmission data transmission method.

[0131] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the 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 several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0132] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the 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 several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0133] On the other hand, an embodiment of the present invention further provides a storage medium on which a plurality of instructions are stored, and the instructions are suitable for being loaded by a processor to execute the forward transmission data transmission method provided in the above embodiments.

[0134] In addition, the logic instructions in the above-mentioned storage medium can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0135] On the other hand, an embodiment of the present invention further provides a computer program product. When the program code contained in the computer program product is executed by a processor in an electronic device, the fronthaul data transmission method provided in the above embodiments is implemented.

[0136] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0137] Through the description of the above implementation modes, those skilled in the art can clearly understand that each implementation mode can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on such an understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0138] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A method for fronthaul data transmission performed by a distributed unit in a wireless communication system, characterized in that: include: Determining whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the distributed unit is connected to the wireless unit through the forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports and code division multiplexing group information, and the code division multiplexing group information includes multiplexing time-frequency domain resource information; In a case where it is determined that CSI-RS data compression is required, compressing first CSI-RS data of K initial CSI-RS ports into second CSI-RS data of M target CSI-RS ports, wherein M is less than or equal to the number of channels and M is less than K, the second CSI-RS data includes at least one first CSI-RS data, and the case where it is determined that CSI-RS data compression is required includes that the number of initial CSI-RS ports K is greater than the number of channels; Transmitting the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the fronthaul interface; The method of compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports includes: Determine an initial CSI-RS port of the same code division multiplexing group according to the multiplexed time-frequency domain resource information, wherein the initial CSI-RS port of the same code division multiplexing group uses the same time-frequency domain resource; The first CSI-RS data corresponding to the initial CSI-RS ports of multiple different code division multiplexing groups are compressed to a target CSI-RS port to form second CSI-RS data, and the target CSI-RS port is any one of the initial CSI-RS ports of the multiple different code division multiplexing groups.

2. The method according to claim 1, characterized in that Before compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports, the method further includes: The target CSI-RS port number M is determined according to the number of channels.

3. The method according to claim 2, characterized in that The code division multiplexing group information also includes the number of multiplexed CSI-RS ports, and the target CSI-RS port number M is greater than or equal to the number of multiplexed CSI-RS ports.

4. The method according to claim 3, characterized in that The forward data to be sent includes third data, and the third data is data corresponding to other downlink physical channels and / or physical signals except the first CSI-RS data; the target CSI-RS port number M is determined according to the maximum number of channels required by the third data.

5. The method according to claim 1, characterized in that The method also includes: Generate control plane information according to the second CSI-RS data and send the control plane information together with the second CSI-RS data to the wireless unit; Among them, the control plane information includes multiple section field information, the section field information includes section field identification information and resource element mask information, the section field identification information is used to calculate the number of first CSI-RS data included in the second CSI-RS data, and the resource element mask information is used to indicate the resource elements used by the first CSI-RS data.

6. The method according to claim 1, characterized in that When the target CSI-RS port number M is an even number, each of the second CSI-RS data includes First CSI-RS data; When the number of target CSI-RS ports M is an odd number, M-1 second CSI-RS data among the M second CSI-RS data include The first CSI-RS data and the remaining second CSI-RS data include the remaining first CSI-RS data; or, M-1 of the second CSI-RS data include The first CSI-RS data.

7. The method according to claim 1, characterized in that The case where it is determined that CSI-RS data compression is required also includes that the initial CSI-RS port number K is less than or equal to the number of channels and the forward data to be sent also includes third data; Before compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports, the method further includes: The target CSI-RS port number M is determined according to the maximum number of channels required by the third data; the third data is data corresponding to other downlink physical channels and / or physical signals excluding the first CSI-RS data.

8. A method for transmitting fronthaul data performed by a wireless unit in a wireless communication system, characterized in that: include: Receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data; The distributed unit is connected to the wireless unit through the fronthaul interface, the second CSI-RS data of the M target CSI-RS ports is obtained by compressing the first CSI-RS data of K initial CSI-RS ports by the distributed unit when determining that CSI-RS data compression is required, M is less than or equal to the number of channels of the fronthaul interface and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data; The situation where it is determined that CSI-RS data compression is required includes that the initial CSI-RS port number K is greater than the number of channels; The compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports includes: Determine an initial CSI-RS port of the same code division multiplexing group according to the multiplexed time-frequency domain resource information, wherein the initial CSI-RS port of the same code division multiplexing group uses the same time-frequency domain resource; The first CSI-RS data corresponding to the initial CSI-RS ports of multiple different code division multiplexing groups are compressed to a target CSI-RS port to form second CSI-RS data, and the target CSI-RS port is any one of the initial CSI-RS ports of the multiple different code division multiplexing groups.

9. The method according to claim 8, characterized in that The method also includes: receiving control plane information sent by the distributed unit, the control plane information including a plurality of section field information, the section field information including section field identification information and resource element mask information, the section field identification information being used to calculate the number of first CSI-RS data included in the second CSI-RS data, and the resource element mask information being used to indicate resource elements used by the first CSI-RS data; The receiving, through the fronthaul interface, second CSI-RS data of M target CSI-RS ports sent by the distributed unit and decompressing the data to obtain K first CSI-RS data includes: In the case that at least two of the section field identification information are the same, the second CSI-RS data is decompressed according to the resource element mask information corresponding to the same section field identification information to obtain multiple first CSI-RS data.

10. A forward data transmission device, characterized in that: The apparatus comprises a distributed unit in a wireless communication system, the distributed unit comprising: A compression determination module, used to determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the distributed unit is connected to the wireless unit through the forward transmission interface, and the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports and code division multiplexing group information, and the code division multiplexing group information includes multiplexing time-frequency domain resource information; A data compression module, configured to compress the first CSI-RS data of K initial CSI-RS ports into second CSI-RS data of M target CSI-RS ports when it is determined that CSI-RS data compression is required, wherein M is less than or equal to the number of channels and M is less than K, the second CSI-RS data includes at least one first CSI-RS data, and the situation where it is determined that CSI-RS data compression is required includes that the number of initial CSI-RS ports K is greater than the number of channels; A data sending module, configured to transmit the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the forward transmission interface; Wherein, the data compression module is specifically used for: Determine an initial CSI-RS port of the same code division multiplexing group according to the multiplexed time-frequency domain resource information, wherein the initial CSI-RS port of the same code division multiplexing group uses the same time-frequency domain resource; The first CSI-RS data corresponding to the initial CSI-RS ports of multiple different code division multiplexing groups are compressed to a target CSI-RS port to form second CSI-RS data, and the target CSI-RS port is any one of the initial CSI-RS ports of the multiple different code division multiplexing groups.

11. A forward data transmission device, characterized in that: The device comprises a wireless unit in a wireless communication system, the wireless unit comprising: A receiving and decompression module, configured to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data; The distributed unit is connected to the wireless unit through the fronthaul interface, the second CSI-RS data of the M target CSI-RS ports is obtained by compressing the first CSI-RS data of K initial CSI-RS ports by the distributed unit when determining that CSI-RS data compression is required, M is less than or equal to the number of channels of the fronthaul interface and M is less than K, and the second CSI-RS data includes at least one first CSI-RS data; The situation where it is determined that CSI-RS data compression is required includes that the initial CSI-RS port number K is greater than the number of channels; The compressing the first CSI-RS data of the K initial CSI-RS ports into the second CSI-RS data of the M target CSI-RS ports includes: Determine an initial CSI-RS port of the same code division multiplexing group according to the multiplexed time-frequency domain resource information, wherein the initial CSI-RS port of the same code division multiplexing group uses the same time-frequency domain resource; The first CSI-RS data corresponding to the initial CSI-RS ports of multiple different code division multiplexing groups are compressed to a target CSI-RS port to form second CSI-RS data, and the target CSI-RS port is any one of the initial CSI-RS ports of the multiple different code division multiplexing groups.

12. A wireless communication system, characterized in that: It includes a distributed unit, a wireless unit and a fronthaul interface, wherein the fronthaul interface is used to connect the distributed unit and the wireless unit; Wherein, the distributed unit includes: A compression determination module, used to determine whether CSI-RS data compression is required according to the forward transmission data to be sent and the number of channels of the forward transmission interface, wherein the forward transmission data to be sent includes at least the first CSI-RS data of K initial CSI-RS ports and code division multiplexing group information, and the code division multiplexing group information includes multiplexing time-frequency domain resource information; A data compression module, configured to compress the first CSI-RS data of K initial CSI-RS ports into second CSI-RS data of M target CSI-RS ports when it is determined that CSI-RS data compression is required, wherein M is less than or equal to the number of channels and M is less than K, the second CSI-RS data includes at least one first CSI-RS data, and the situation where it is determined that CSI-RS data compression is required includes that the number of initial CSI-RS ports K is greater than the number of channels; A data sending module, configured to transmit the second CSI-RS data of the M target CSI-RS ports to the wireless unit through the forward transmission interface; The wireless unit comprises: A receiving and decompression module, configured to receive and decompress the second CSI-RS data of M target CSI-RS ports sent by the distributed unit through the fronthaul interface to obtain K first CSI-RS data; The data compression module is specifically used for: Determine an initial CSI-RS port of the same code division multiplexing group according to the multiplexed time-frequency domain resource information, wherein the initial CSI-RS port of the same code division multiplexing group uses the same time-frequency domain resource; The first CSI-RS data corresponding to the initial CSI-RS ports of multiple different code division multiplexing groups are compressed to a target CSI-RS port to form second CSI-RS data, and the target CSI-RS port is any one of the initial CSI-RS ports of the multiple different code division multiplexing groups.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method according to any one of claims 1 to 9 are implemented.

14. A storage medium, characterized in that: The storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute the steps of the method according to any one of claims 1 to 9.

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