WO2021056848A1 - Data transmission method and system, computer device, and storage medium - Google Patents

Abstract

The present application relates to a data transmission method and system, a computer device, and a storage medium. A host unit uses signal transmission quality data and the current cell load of a plurality of service remote unit groups corresponding to the UE to complete the intelligent selection of a remote unit group to be transmitted of the UE; and after a target extension unit processes an uplink data signal of the selected remote unit group, the target extension unit returns same back to the host unit. In the described method, since the host unit implements the intelligent selection of an uplink service remote unit group of the UE, different remote unit groups to be-transmitted are determined in different cases of cell load, so as to ensure that an edge user uploads maximum data according to an actual resource capacity, thereby greatly improving the uplink performance of the edge user under the overlapping coverage of remote unit groups.

Description

Data transmission method, system, computer equipment and storage medium Technical field

This application relates to the field of communication technology, and in particular to a data transmission method, system, computer equipment and storage medium.

Background technique

The distributed pico base station is a new type of indoor wireless distribution system that performs optical fiber or Category 5 wiring indoors. It uses a base band unit (BBU) + radio unit (RRU) structure.

Among them, the system architecture of the distributed pico base station is composed of a host unit + an extension unit + a remote unit. Based on the Third Generation Partnership Project (3GPP) protocol, a number of ways to split the function between the BBU and RRU have been proposed. This option is used as a reference, that is, in the prior art, the host unit, extension unit and remote unit are divided into functions based on option8, and then the host unit completes the modulation and demodulation of the baseband signal, and the extension unit is responsible for the forwarding and downlink signal transmission. And converge, and then receive/send uplink/downlink radio frequency signals through the remote unit, so as to achieve continuous coverage of the indoor environment.

However, when the host unit processes the uplink data of the remote unit, it merges the data of all the remote units, resulting in a multiple increase of the noise floor, and the performance of edge users under the coverage of multiple remote unit groups is poor.

Summary of the invention

Based on this, it is necessary to provide a data transmission method, system, and computer equipment for the technical problem of poor performance of edge users under the coverage of multiple remote unit groups when the host unit processes the uplink data of the remote unit. And storage media.

In the first aspect, an embodiment of the present application provides a data transmission method, including the following steps:

According to the signal transmission quality data of multiple serving remote unit groups and the UE, determine whether the UE is an edge user; the edge user is a user located between multiple remote unit groups;

If the UE is an edge user, determine the current serving remote unit group of the UE according to the current load of the cell where the UE is located and various signal transmission quality data;

The uplink scheduling information of the UE is transmitted to the target extension unit; the target extension unit indicates the extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit to upload the currently serving remote unit group according to the uplink scheduling information The uplink data of the UE is processed, and the processed uplink data is uploaded to the host unit.

In the second aspect, an embodiment of the present application provides a data transmission method, including the following steps:

Receive the uplink scheduling information of the edge user sent by the host unit; the edge user is the user located between multiple remote unit groups;

According to the uplink scheduling information, process the uplink data of the UE uploaded by the current serving remote unit group of the edge user, and upload the processed uplink data to the host unit; the current serving remote unit group is based on the current load of the cell where the edge user is located The service remote unit group of the edge user is determined by the signal transmission quality data of the multiple service remote unit groups of the edge user.

In a third aspect, an embodiment of the present application provides a base station system, including: a host unit, an extension unit, and a remote unit; the host unit is connected to at least one extension unit, and each extension unit is connected to multiple remote unit groups; The remote unit group includes at least one remote unit;

The host unit is used to determine whether the UE is an edge user according to the signal transmission quality data of multiple serving remote unit groups and the UE, and when the UE is an edge user, determine according to the current load of the cell where the UE is located and the signal transmission quality data The UE currently serves the remote unit group, and then transmits the UE's uplink scheduling information to the target extension unit; the edge user is the user located between multiple remote unit groups; the target extension unit indicates the one connected to the current serving remote unit group Extension unit; the uplink scheduling information is used to instruct the target extension unit to process the UE uplink data uploaded by the currently serving remote unit group according to the uplink scheduling information, and upload the processed uplink data to the host unit;

The extension unit is used to receive the uplink scheduling information of the edge user sent by the host unit; and process the uplink data of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information, and then upload the processed uplink data to the host unit; The current serving remote unit group is determined according to the current load of the cell where the edge user is located and the signal transmission quality data of each serving remote unit group of the edge user;

The remote unit is used to implement radio frequency signal transceiving functions.

In a fourth aspect, an embodiment of the present application provides a computer device, including a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, any one of the methods provided in the embodiments of the first aspect and the second aspect is implemented. step.

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the methods provided in the embodiments of the first aspect and the second aspect are implemented .

According to a data transmission method, system, computer equipment, and storage medium provided by the embodiments of the present application, the host unit completes the transmission of the UE through the signal transmission quality data of the multiple serving remote unit groups corresponding to the UE and the current load of the cell. The intelligent selection of the remote unit group to be transmitted, and after the uplink data signal target expansion unit of the selected remote unit group to be transmitted is processed, it is transmitted back to the host unit. In this method, since the host unit realizes the intelligent selection of the UE's uplink service remote unit group, different remote unit groups to be transmitted are determined under different cell load conditions to ensure that edge users upload the maximum data according to the actual resource capacity. Greatly improve the uplink performance of users at the lower edge of the overlapping coverage of the remote unit group.

Description of the drawings

FIG. 1 is an application environment diagram of a data transmission method provided by an embodiment;

FIG. 2 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 3 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 4 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 6 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 7 is an interaction diagram of a data transmission method provided by an embodiment;

Figure 8 is a schematic diagram of BBU-RRU function segmentation provided by the 3GPP protocol;

FIG. 9 is a schematic diagram of a base station subsystem according to an embodiment;

FIG. 10 is a schematic diagram of functional division of a host unit provided by an embodiment;

FIG. 11 is a schematic diagram of a UE location scenario provided by an embodiment;

Fig. 12 is a diagram of the internal structure of a computer device in an embodiment.

detailed description

In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

The data transmission method provided by this application can be applied to the base station system as shown in FIG. 1. The system includes a host unit, an extension unit, and a remote unit. The host unit is in communication connection with multiple extension units, and each extension The units are all communicatively connected with at least one remote unit. Among them, multiple expansion units can have a parallel relationship, such as expansion unit 1 and expansion unit 2, or a cascade relationship, such as expansion unit 1 and expansion unit 3; all remote units connected to the same expansion unit can form A remote unit group, the remote units connected to the same expansion unit can also be combined to form multiple remote unit groups. Each expansion unit can be connected to at least one remote unit group (not limited to one remote unit group shown in Figure 1), such as the remote unit group 1 to which the expansion unit 1 is connected; each remote unit group can include At least one remote unit. The host unit mainly completes the modulation and demodulation of baseband signals, the expansion unit mainly completes the forwarding and aggregation of uplink/downlink signals, and the remote unit mainly completes the RF reception/radio transmission of uplink/downlink signals; generally, the host unit communicates with the core network Connected, the remote unit communicates with the UE. Therefore, the above-mentioned base station system can realize the communication between the host unit and the UE, the communication between the core network and the UE, the communication between the UE and the UE, and so on. Among them, the UE may be, but is not limited to, devices with radio frequency receiving/sending functions such as smart phones, computer equipment, portable wearable devices, Internet of Things equipment, vehicles, drones, and industrial equipment.

The embodiments of the present application provide a data transmission method, system, computer equipment, and storage medium, which are designed to solve the poor performance of edge users under the coverage of multiple remote unit groups when the host unit processes the uplink data of the remote unit. Technical issues. Hereinafter, the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems will be described in detail through the embodiments and the accompanying drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, in the data transmission method provided by the present application, the execution body in FIGS. 2 to 4 is a host unit, and the execution body in FIGS. 5 to 6 is an expansion unit. Wherein, the execution subject of FIGS. 2 to 6 may also be a data transmission device, which may be implemented as part or all of data transmission through software, hardware, or a combination of software and hardware.

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments.

The side where the execution subject is the host unit will be described in detail below.

In one embodiment, FIG. 2 provides a data transmission method. This embodiment relates to a host unit determining whether a user terminal (User Equipment, UE) is an edge user, and then determining the current serving remote unit of the UE The specific process of uplink transmission of data currently serving the remote unit group is shown in Figure 2. The method includes:

S101: Determine whether the UE is an edge user according to the signal transmission quality data of multiple serving remote unit groups and the UE; the edge user is a user located between the multiple remote unit groups.

In this embodiment, the serving remote unit group refers to the remote unit group serving the UE, and each serving remote unit group includes multiple remote units. It should be noted that each of the remote unit groups includes The remote units may have a correlation in their spatial positions, for example, the distance between each other is less than a preset distance threshold, or they are all in an area of a preset size. Among them, the signal transmission quality data represents the signal data of the signal quality status between the remote unit and the UE. For example, the signal transmission quality data may be obtained in advance, or may be reported by the UE in real time, which is not limited in this embodiment. Wherein, the edge user refers to the location where the UE is located between multiple serving remote user groups, and the edge location is relative to the central user. The central user means that the UE is at the center of a serving remote unit group.

For example, in practical applications, the host unit determines whether the UE is an edge user based on the signal transmission quality data of multiple serving remote unit groups and the UE. The determination method may be that the host unit determines the signal of each signal transmission quality data. Strength, according to the signal strength of the UE transmitted by the multiple serving remote unit groups, it is determined whether the UE is an edge user. For example, the host unit determines whether the UE is located between multiple serving remote unit groups or in the center of a serving remote unit group according to the signal quality strength of UEs transmitted by multiple serving remote unit groups. Between multiple serving remote unit groups, the UE is determined to be an edge user, otherwise it is a central user.

S102: If the UE is an edge user, determine the current serving remote unit group of the UE according to the current load of the cell where the UE is located and various signal transmission quality data.

If the UE determined in step S101 is an edge user, the host unit determines the group of serving remote units to be transmitted according to the current load of the cell where the UE is located and various signal transmission quality data. Among them, the current serving remote unit group represents the target serving remote unit group that the host unit needs to receive and process data, which is equivalent to if the UE is an edge user, the signal data sent by it can be transmitted through multiple serving remote unit groups To the host unit, but the host unit is under environmental constraints, such as the impact of cell load, which prevents the host unit from receiving and processing all the data transmitted by the UE serving remote unit group. Therefore, in practical applications, the host unit needs to be based on the cell where the UE is located. The current load of the UE and the signal transmission quality data of each serving remote unit group determine the current serving remote unit group of the UE.

It should be noted that when the UE is an edge user, the host unit determines the currently serving remote unit group. If the UE determined in step S101 is not an edge user but a central user, the host unit directly obtains From the signal transmission quality data, the one with the highest signal strength can be determined as the current serving remote unit group of the UE. In one embodiment, if the UE is an edge user, the number of remote unit groups currently served by the UE is at least two; if the aforementioned UE is a central user, the number of remote unit groups currently served by the UE is one.

S103. The uplink scheduling information of the UE is transmitted to the target extension unit; the target extension unit indicates the extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit to perform the current serving remote unit based on the uplink scheduling information. Group the uploaded UE uplink data for processing, and upload the processed uplink data to the host unit.

Based on the determination of the currently serving remote unit group in step S102, the host unit transmits the uplink scheduling information of the currently serving remote unit group to the target extension unit. Wherein, the uplink scheduling information includes time-frequency resource information (such as time-frequency resource location) allocated to the currently serving remote unit group by the host unit and identification information of the currently serving remote unit group, which is used to instruct the target extension unit according to the time The frequency resource information transmits data to the currently serving remote unit group and the host unit, that is, the target expansion unit processes the uplink data uploaded by the currently serving remote unit group, and uploads the processed uplink data to the host unit. Wherein, the uplink data may be voice data, video data, web page data, etc., uplink control data, etc. Wherein, the target expansion unit represents the expansion unit connected to the currently serving remote unit group. It should be noted that since a remote unit group can be connected to multiple expansion units, that is, the target expansion unit in this embodiment is connected to the current service remote unit group. One of the expansion units connected to the serving remote unit group, and the signal transmission link between the host unit connected to the target expansion unit and the current serving remote unit group has the best signal quality, where the signal transmission link represents It is the link between the host unit-expansion unit-remote unit-UE. It is understandable that the communication between the host unit and the currently serving remote unit group is carried out through the target extension unit, avoiding communication with the UE through other non-target extension units, so as to improve the current serving remote unit group and the host unit. High-quality, high-efficiency signal data transmission between.

In the data transmission method provided in this embodiment, the host unit completes the intelligent selection of the UE’s remote unit group to be transmitted through the signal transmission quality data of the multiple serving remote unit groups corresponding to the UE and the current load of the cell, and After the uplink data signal destination expansion unit of the selected remote unit group to be transmitted is processed, it is transmitted back to the host unit. In this method, since the host unit realizes the intelligent selection of the UE's uplink service remote unit group, different remote unit groups to be transmitted are determined under different cell load conditions to ensure that edge users upload the maximum data according to the actual resource capacity. Greatly improve the uplink performance of users at the lower edge of the overlapping coverage of the remote unit group.

On the basis of the above embodiments, the embodiments of the present application also provide a data transmission method, which involves a specific process for the host unit to determine whether the UE is an edge user. As shown in FIG. 3, the above S101 step includes:

S201: Acquire signal transmission quality data of multiple serving remote unit groups corresponding to the UE.

In this embodiment, the host unit obtains signal transmission quality data of multiple serving remote unit groups corresponding to the UE, where the signal transmission quality data represents a signal of the signal quality status between the remote unit and the UE. Optionally, the signal transmission quality data is sounding reference signal data, or preamble data acquired through a physical random access channel, that is, sounding reference signal (SRS, Sounding Reference Signal), or physical random access channel The preamble signal uploaded by the (Physical Random Access Channel, PRACH), of course, is not limited to these two types, and may also be other signals that can characterize the signal quality between the remote unit and the UE.

For example, in practical applications, the host unit may obtain the signal transmission quality data of the serving remote unit group of the UE by first determining the serving remote unit group corresponding to the UE, and then obtaining the signal transmission quality data of the serving remote unit group . The manner in which the host unit determines the serving remote unit group corresponding to the UE may be determined according to the location information of the UE, may also be determined according to the signal of the UE, or may be in other manners, which is not limited in this embodiment.

S202: Obtain a difference between each signal transmission quality data.

Based on the multiple signal transmission quality data acquired in step S201, the host unit acquires the difference between the signal transmission quality data.

S203: If the increase range of each difference meets the preset amplitude rule, determine that the UE is an edge user; the preset amplitude rule is used to indicate the amplitude change rule of each signal transmission quality data.

According to the difference between each signal transmission quality data obtained in S202, the host unit determines whether the increase range of each difference meets the preset amplitude rule, where the preset amplitude rule is used to indicate the amplitude change of each signal transmission quality data Rule, if the increase range of each difference meets the preset range rule, the UE is determined to be an edge user.

Optionally, in one embodiment, if the aforementioned UE is an edge user, the location of the UE is located between multiple remote unit groups; if the location of the UE is located at the center of a remote unit group, the UE is a central user.

For example, if the increment of each difference is a gentle increase, it means that the signal data strengths of the UEs received by the multiple serving remote unit groups are not much different. In this case, it means that the UE is at multiple serving remotes. Between the unit groups, the UE is an edge user. If the increment of each difference value is one of which is much larger than the other value, it means that the signal strength of one serving unit group is much greater than the signal strength of other serving remote unit groups, which means that the UE is at the highest signal strength. The strong service remote unit group center, then the UE is the center user.

In the data transmission method provided in this embodiment, the host unit determines the change rule of the increase range of each difference according to the difference between the signal transmission quality data of multiple remote unit groups, and if the change rule of the increase range meets the expected value If the amplitude rule is set, the UE is determined to be an edge user. In this way, the change rule of the user's position is located according to the strength of the signal, and then the edge user is determined according to the change rule, which greatly improves the accuracy of the judgment of the edge user.

In addition, the data uplink process is described in the embodiment of FIG. 2. In practical applications, the data also involves the downlink transmission process. The downlink process represents the data transmission process from the host unit to the UE. For the downlink data transmission process , The present application provides an embodiment, and the method further includes: transmitting the downlink scheduling information and downlink data of the UE to a target extension unit; the target extension unit is used to process the downlink data according to the downlink scheduling information, and the processed downlink The data is transmitted to the UE through the currently serving remote unit group.

Among them, the host unit sends the downlink scheduling information and downlink service data of the UE to the target extension unit. After receiving the downlink scheduling information and downlink service data, the target extension unit allocates the downlink scheduling information and downlink service data to the UE according to the host unit carried in the downlink scheduling information. Time-frequency resources, the downlink service data is processed, and then the processed downlink service data is transmitted to the UE through the currently serving remote unit group. Among them, the downlink service data is data to be sent by the host unit to the UE, such as voice data, video data, webpage data, etc., delivered by the core network. Among them, the data processing of the target extension unit includes, but is not limited to, Fourier transform, channel estimation, equalization, descrambling, decoding, and RE demapping.

Optionally, in an embodiment, the target extension unit is used to perform low-layer physical layer processing on uplink data and downlink data. Regardless of the uplink process or the downlink process, the target extension unit performs low-level physical layer processing on the data before transmitting it to the host unit or the remote unit to be transmitted. The lower physical layer includes but is not limited to FFT and RE demapping processing, and the processed data may be SRS symbol data.

Optionally, in one embodiment, both the uplink scheduling information and the downlink scheduling information include the identity of the currently serving remote unit group. Among them, the identifier of the currently serving remote unit group is used to instruct the target expansion unit to determine which remote unit group is currently serving, where the identifier can be in any form, such as numbers, letters, or a combination thereof. This application is implemented The example does not limit this. This can ensure that the target expansion unit quickly and efficiently locates the accurate current serving remote unit group.

Optionally, in one embodiment, the target expansion unit transmits data to the host unit through the enhanced public wireless interface; the target expansion unit transmits data to the currently serving remote unit group through the public wireless interface. Among them, the target expansion unit and the remote unit group communicate through a public radio interface, that is, the target expansion unit transmits the processed downlink service data to the remote unit group to be served through the Common Public Radio Interface (CPRI) . The target extension unit and the host unit communicate through an enhanced public radio interface, that is, the target extension unit transmits the processed uplink service data back to the host unit through the Enhanced Common Public Radio Interface (eCPRI). This can greatly reduce the transmission bandwidth requirements. During the uplink process, the amount of uplink service data received by the host unit is only the specified amount to the remote unit group to be transmitted, thereby reducing the amount of uplink service data transmission data, thereby reducing the requirements for uplink fronthaul bandwidth .

In the data transmission method provided in this embodiment, the universal public radio interface is used for transmission between the expansion unit and the remote unit, which effectively reduces the design complexity and cost of the remote unit, and the enhanced public radio interface is used for transmission between the host unit and the expansion unit. , Which greatly reduces the transmission bandwidth requirements. In the uplink and downlink data scheduling process, the host unit and the extension unit cooperate to complete the convergence and distribution of the uplink and downlink signals, avoiding further radio frequency merging, and limiting the rise of the receiving noise floor. In addition, the embodiment of the application lowers the function of the lower physical layer When implemented in the expansion unit, the expansion unit has independent demodulation and decoding capabilities, which greatly reduces the design cost of the host unit.

It should be noted that the UE, remote unit, serving remote unit group, extension unit, etc., will be assigned a unique identifier during the above-mentioned downlink or uplink data transmission process, so as to ensure the correctness of the data transmission during the uplink and downlink data transmission. And efficiency. For example, the remote unit group has a group identity, the UE has a unique identity in the cell, etc. In practical applications, the identity can be assigned according to the situation, which is not limited in this embodiment. It should also be noted that the data of the serving remote unit group and the extension unit mentioned in this application all represent the UE's upper and lower service data, and the UE's uplink data is uploaded to the extension unit through the serving remote unit group, and then uploaded To the host unit, or, the host unit downloads the UE's downlink data through the extension unit to the serving remote unit group, and then transmits it to the UE.

Regarding the process in which the host unit in the foregoing embodiment determines the currently serving remote unit group according to the current load of the cell where the UE is located, an embodiment of the present application also provides a data transmission method. As shown in FIG. 4, the foregoing step S102 includes:

S301: Acquire the current load of the cell where the UE is located; the current load includes the base station load and the real-time bandwidth load of the fronthaul link.

In this embodiment, the host unit obtains the current load of the cell where the UE is located, where the current load includes base station load and fronthaul link real-time bandwidth load. For example, when the current load is determined according to the base station load and the fronthaul link real-time bandwidth load, the current load can be determined separately. Set the corresponding weight, and then calculate the weighted sum to get the current load. Wherein, the method of the base station load and the real-time bandwidth load of the fronthaul link obtained by the host unit may be by detecting and monitoring the current service load condition of the base station and the fronthaul link, and then converting it into a load value. It may also be in other ways. Not limited.

S302: If the load is greater than or equal to the preset load threshold, determine the serving remote unit group corresponding to the largest signal transmission quality data as the current serving remote unit group.

Based on the load value obtained in S301, the host unit determines the load value and the preset load threshold. If the load is greater than or equal to the preset load threshold, the signal transmission quality of each service remote unit group obtained in step S101 is The data is sorted from largest to smallest, and the serving remote unit group corresponding to the largest signal transmission quality data is determined as the current serving remote unit group. Because the larger the signal transmission quality data, the better the signal, so the largest signal The serving remote unit group corresponding to the transmission quality data is determined to be the current serving remote unit group, which is equivalent to overloading and insufficient remaining resources, only the current serving remote unit group with better signal transmission quality data is transmitted to ensure data integrity Normal transmission improves the UE’s service data upload performance.

S303: If the load is less than the preset load threshold, determine the serving remote unit group corresponding to the signal transmission quality data greater than the preset signal value as the current serving remote unit group.

In this step, if the load is less than the preset load threshold, the serving remote unit group corresponding to the signal transmission quality data greater than the preset signal value is determined as the current serving remote unit group, where the preset signal value is preset A critical value used to select data with better signal transmission quality, which is equivalent to selecting multiple sets of service remote unit groups with better signal quality under the condition that the load is small and the remaining resources are sufficient. The end unit group, the multiple groups are determined according to the preset signal value, and the service remote unit group corresponding to the signal transmission quality data greater than the preset signal value can be transmitted.

The data transmission method provided in this embodiment determines the current serving remote unit group according to the current load of the cell. When the load is high, only one uplink signal of the UE needs to be uploaded to ensure that the fronthaul bandwidth of the entire cell does not overflow. The UE's multi-route signal transmission can improve the uplink performance of serving remote unit groups under the overlapping coverage of edge users.

In addition, in one embodiment, the host unit described in all the foregoing embodiments performs high-level physical layer processing on the processed uplink data uploaded by the target extension unit, that is, the high-level physical layer is implemented in the host unit, where High-level physical layer (PHY-H) processing, including but not limited to channel estimation, equalization, descrambling, decoding, etc. The data processed by the high-level physical layer is bit data.

The following is a detailed description of the embodiments involved on the side of the target expansion unit as the execution subject. It should be noted that due to the overlapping terms, steps or beneficial effects between the embodiment on the target expansion unit side and the embodiment on the host unit side, These repetitive parts have been described in the embodiment on the host unit side, and will not be repeated in the embodiment on the target expansion unit side.

In one embodiment, FIG. 5 provides a data transmission method. This embodiment relates to the transmission of uplink data to the host unit by the target extension unit according to the uplink scheduling information of the service remote unit group to be transmitted sent by the host unit. The specific process, as shown in Figure 5, the method includes:

S401: Receive uplink scheduling information of an edge user sent by a host unit; the edge user is a user located between multiple remote unit groups.

In this embodiment, the target extension unit receives the uplink scheduling signal of the edge user sent by the host unit, and the edge user is a user located between multiple remote unit groups. Wherein, the uplink scheduling information carries uplink time-frequency resource information and the identifier of the currently serving remote unit group.

S402: Process the uplink data of the UE uploaded by the remote unit group currently serving by the edge user according to the uplink scheduling information, and upload the processed uplink data to the host unit; The load and signal transmission quality data of multiple service remote unit groups of edge users are determined.

Based on the uplink scheduling information of the edge user received in step S401, the target extension unit processes the uplink data of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information, and uploads the processed uplink data to the host unit. Wherein, the currently serving remote unit group is determined based on the current load of the cell where the edge user is located and the signal transmission quality data of the multiple serving remote unit groups of the edge user. Optionally, in an embodiment, the above-mentioned signal transmission quality data is preamble data obtained through a physical random access channel, or sounding reference signal data.

This embodiment provides a data transmission method. After receiving the uplink scheduling information sent by the host unit, the target extension unit processes the uplink data of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information, and uploads the processed uplink data to the host unit. Because the current serving remote unit group is intelligently selected by the host unit based on the signal transmission quality data of the multiple serving remote unit groups of the edge user and the current load situation of the cell, different cell load conditions are determined to be transmitted. Remote unit group to ensure that edge users upload the maximum data according to the actual resource capacity, which greatly improves the uplink performance of the edge users under the overlapping coverage of the remote unit group.

For the downlink process, in one embodiment, as shown in FIG. 6, the method further includes:

S501: Receive downlink scheduling information and downlink data of edge users transmitted by a host unit.

The target extension unit receives the downlink scheduling information and downlink data of the edge user transmitted by the host unit. Wherein, the downlink scheduling information carries including but not limited to the downlink time-frequency resource information and the identifier of the currently serving remote unit group.

S502: Process the downlink data according to the downlink scheduling information, and transmit the processed downlink data to the edge user through the currently serving remote unit group.

According to the downlink scheduling information, the target extension unit processes the downlink data, and transmits the processed downlink data to the edge user through the currently serving remote unit group. Among them, the downlink service data is data to be sent by the host unit to the edge users, such as voice data, video data, webpage data, etc., delivered by the core network. Among them, the data processing of the target extension unit includes, but is not limited to, Fourier transform, channel estimation, equalization, descrambling, decoding, and RE demapping.

Optionally, in one embodiment, it is used to perform low-layer physical layer processing on uplink data and downlink data. Regardless of the uplink process or the downlink process, the target extension unit performs low-level physical layer processing on the data before transmitting it to the host unit or the remote unit to be transmitted. The lower physical layer includes but is not limited to FFT and RE demapping processing, and the processed data may be SRS symbol data.

Optionally, in one embodiment, both the uplink scheduling information and the downlink scheduling information include the identity of the currently serving remote unit group. Among them, the identifier of the currently serving remote unit group is used to instruct the target expansion unit to determine which remote unit group is currently serving, where the identifier can be in any form, such as numbers, letters, or a combination thereof. This application is implemented The example does not limit this. This can ensure that the target expansion unit quickly and efficiently locates the accurate current serving remote unit group.

Optionally, in one embodiment, data transmission is performed with the host unit through an enhanced public wireless interface; data transmission is performed with the currently serving remote unit group through the public wireless interface. Wherein, the target expansion unit and the remote unit group are communicatively connected through a public wireless interface, that is, the target expansion unit transmits the processed downlink service data to the to-be-served remote unit group through CPRI. The target extension unit and the host unit are in communication connection through an enhanced public wireless interface, that is, the target extension unit transmits the processed uplink service data back to the host unit through eCPRI. This can greatly reduce the transmission bandwidth requirements. During the uplink process, the amount of uplink service data received by the host unit is only the specified amount to the remote unit group to be transmitted, thereby reducing the amount of uplink service data transmission data, thereby reducing the requirements for uplink fronthaul bandwidth .

In addition, in one embodiment, if the UE is an edge user, the number of currently serving remote unit groups is one; if the UE is a central user, the number of currently serving remote unit groups is at least two. In addition, in one embodiment, if the UE is an edge user, the location of the UE is located among multiple remote unit groups; if the location of the UE is located at the center of a remote unit group, the UE is a central user.

Among them, according to the location relationship between the UE and the serving remote unit group, the UE can be divided into edge users and central users. If the UE is an edge user, the location of the UE is located between multiple remote unit groups; If the location is in the center of a remote unit group, the UE is the center user. In addition, the number of remote unit groups to be transmitted corresponding to edge users and central users is different. If the UE is an edge user, the number of currently serving remote unit groups is one; if the UE is a central user, the number of currently serving remote unit groups is at least two. Specifically, the content involved in the above data transmission method can be understood in conjunction with the base station system provided below, and the two complement each other and can be referred to each other.

It should be understood that although the various steps in the flowcharts of FIGS. 2-6 are displayed in sequence as indicated by the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order for the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figures 2-6 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. These sub-steps or stages The execution order of is not necessarily performed sequentially, but may be performed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

An embodiment of the present application provides a base station system, which includes: a host unit, an extension unit, and a remote unit; the host unit is connected to at least one extension unit, and each extension unit is connected to multiple remote unit groups; wherein, each remote The unit group includes at least one remote unit;

Among them, the host unit is used to determine whether the UE is an edge user according to the signal transmission quality data of multiple serving remote unit groups corresponding to the UE, and when the UE is an edge user, according to the current load of the cell where the UE is located and each signal transmission The quality data determines the current serving remote unit group of the UE, and then transmits the UE's uplink scheduling information to the target extension unit; the edge users are users located among multiple remote unit groups; the target extension unit indicates the current serving remote unit The expansion unit of the group connection; the uplink scheduling information is used to instruct the target expansion unit to process the uplink data of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information, and upload the processed uplink data to the host unit; the expansion unit, Used to receive the uplink scheduling information of the edge user sent by the host unit; and process the uplink data of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information, and then upload the processed uplink data to the host unit; The end unit group is determined according to the current load of the cell where the edge user is located and the signal transmission quality data of the multiple serving remote unit groups of the edge user; the remote unit is used to implement the radio frequency signal transceiver function. Optionally, the aforementioned extension unit is also used to receive the downlink scheduling information and downlink data of the edge user transmitted by the host unit, and process the downlink data according to the downlink scheduling information and the downlink data, and pass the processed downlink data through the current service remote The unit group is transmitted to the edge user. Optionally, the above-mentioned extension unit performs low-layer physical layer processing on both the uplink data and the downlink data. Optionally, an enhanced public wireless interface is used for data transmission between the host unit and the expansion unit; and a public wireless interface is used for data transmission between the expansion unit and the remote unit.

In this embodiment, please refer to the base station system shown in Figure 1 above. If M remote units are connected to the expansion unit connected to the host unit, and N remote units form a remote unit group, the base station system There are a total of K=[M/N] remote unit groups. If the host unit communicates with the UE through L extension units, based on the base station system, an embodiment of the data transmission process is provided in the embodiment of the present application, as shown in the figure As shown in 7, the data transmission process includes:

S01: The UE periodically sends an SRS (Souding Reference Signal, sounding reference signal) signal.

Specifically, the remote unit receives the RF signal of the SRS and sends it to the extension unit, and the extension unit performs radio frequency combination on the received SRS radio frequency signal. The number of radio frequency combinations passes through the operation and maintenance management subsystem (Operation Administration and Maintenance, OAM) sub-system. The system is configured. The expansion unit performs PHY-L (lower physical layer) processing on the combined SRS radio frequency signal, including FFT and RE demapping, to obtain SRS symbol data.

S02, the extension unit radio frequency merges the remote units to obtain multiple service remote unit groups.

S03: The extension unit sends the SRS symbol data to the host unit, and carries the identifier of the service remote unit group after radio frequency combination.

S04: After receiving the SRS symbol data, the host unit performs PHY-H processing, such as channel estimation, equalization, descrambling, and decoding, to obtain SRS bit data.

S05: The host unit demodulates the SRS symbols of multiple serving remote unit groups to identify edge UEs.

S06: The UE sends a scheduling request (SR) on the PUCCH channel to request the network to allocate uplink resources.

Specifically, this step is the same as S01. The extension unit receives the SR. The scheduling request signal is carried by the PUCCH (Physical Uplink Control Channel) channel. After the radio frequency signal, the radio frequency combination is performed, and the number of radio frequency combinations passes OAM. The subsystem is configured. The expansion unit performs PHY-L processing on the combined SR radio frequency signal to obtain SR PUCCH Bit data.

S07. The extension unit sends the SR PUCCH Bit data to the host unit, and at the same time carries the service remote unit group identifier after radio frequency merge.

S08: After receiving the SR PUCCH Bit data, the host unit notifies the Media Access Control Address (MAC) subsystem to allocate uplink resources.

S09: The host unit determines in real time whether the load of the base station and the effective bandwidth of the fronthaul link with the extension unit meet the uplink performance conditions of the edge UE.

S10. The host unit issues the UE's intra-cell temporary identity, N groups of serving remote unit group identities, and time-frequency resource information to the corresponding extension unit, where the time-frequency resource information includes the UE's uplink resource allocation result, such as physical uplink sharing Time-frequency resource location information of the channel (Physical Uplink Shared Channel, PUSCH) channel.

S11: The extension unit directly transparently transmits the time-frequency resource information to the UE.

S12. The UE sends uplink data on the PUSCH resource specified by the time-frequency resource information.

S13: The expansion unit performs radio frequency combination after receiving the PUSCH radio frequency signal, and the number of radio frequency combinations is configured through the OAM subsystem. The expansion unit performs PHY-L processing on the combined PUSCH radio frequency signal to obtain PUSCH Bit-level data. The PUSCH Bit level data is sent to the host unit, and the remote unit group identifier after radio frequency merge is also carried.

Specifically, according to the UE serving remote unit group issued by the host unit and the PUSCH time-frequency location information specified by the time-frequency resource information, the extension unit only needs to send the corresponding serving remote unit group and the uplink received at the corresponding PUSCH time-frequency location. The data is given to the host unit. In this step, the host unit may locate the UE at the overlap of the two remote unit groups. At this time, the host unit issues two remote unit group identifiers to the extension unit, and the extension unit receives the two remote unit groups. The uplink data is received in diversity, processed by PHY-L, and then uploaded to the host unit. Among them, the expansion unit receives the N service remote unit group data requirements of the edge UE from the host unit, and performs PHY-L processing on the N service remote unit group data separately, and independently returns to the host unit. If the host unit receives multiple data from the same UE, it selects a group of data with a correct CRC check and submits it to the MAC.

S14: After receiving the PUSCH symbol data, the host unit performs PHY-H processing, such as channel estimation, equalization, descrambling, decoding, etc., and finally obtains PUSCH bit data and sends it to the MAC. For the N channels of symbol data of the same PUSCH time-frequency resource, the host unit adopts a diversity combining method in the channel equalization process to improve the SNR of uplink reception.

In the above process, the host unit realizes real-time positioning of the serving remote unit group to which the UE belongs by demodulating the uplink SRS signal of the UE, and sends the current serving remote unit group identifier of the UE to the corresponding extension unit. After receiving the uplink symbol data of the corresponding UE, the extension unit only needs to upload the current serving remote unit group signal of the UE to the host unit, thereby reducing the upstream bandwidth requirement for the fronthaul. In addition, in this application, the PHY-L function is submerged into the extension unit. The extension unit has independent demodulation and decoding capabilities. When the host unit determines that the UE is an edge user, combined with the current cell load, only the remote transmission is to be transmitted. The data of the end unit group greatly improves the uplink performance of edge users.

Based on the above-mentioned embodiment, the embodiment of the present application also provides a base station system. The above-mentioned host unit includes a UE location management subsystem, an enhanced public radio interface subsystem, a scheduling subsystem, a user uplink intelligent selection subsystem, and a high-level physical layer sub-system. System; Among them, the UE location management subsystem is used to locate the UE's service remote unit group and process the data transmitted by the physical layer subsystem in the expansion unit; the enhanced public radio interface subsystem is used to pass the enhanced public The analysis and encapsulation of the data of the wireless interface specification protocol, and the expansion unit perform data transmission through the enhanced public wireless interface specification; the scheduling subsystem is used to manage and schedule the air interface resources; the user uplink intelligent selection subsystem is used to monitor the UE The current load of the cell and the signal transmission quality data of the multiple serving remote unit groups corresponding to the UE, to determine whether the UE is an edge user, so as to determine the remote unit group to be transmitted; the high-level physical layer subsystem is used to service the UE The data undergoes high-level physical layer processing. Optionally, in one embodiment, the aforementioned expansion unit includes a remote unit group management subsystem, an enhanced public wireless interface subsystem, and a low-level physical layer subsystem; wherein, the remote unit group management subsystem is used to communicate with the host The scheduling information on the unit side is used for remote unit group management of uplink service data and downlink service data; the enhanced public radio interface subsystem is used for data transmission between the host unit and the extension unit; the low-level physical layer subsystem is used for the UE The upstream and downstream data is processed at the low-level physical layer.

In this embodiment, please refer to the schematic diagram of the BBU-RRU function segmentation provided by the 3GPP protocol shown in Figure 8. The host unit is responsible for implementing all layer functions before option 6, and the extension unit is responsible for all the physical functions between option 6 and option 8. The realization of layer functions, and the remote unit is responsible for the radio frequency (RF) signal transceiver function after option8, and the layers are divided into functions. Among them, the UE position management subsystem realizes the UE positioning function and the edge position UE identification function , Based on the data processing of the PHY-H (High-PHY, high-level physical layer) subsystem, the UE is located at the remote unit group group level to determine the edge UE identification; the subordinate user uplink intelligent selection subsystem monitors the base station load and fronthaul in real time Real-time bandwidth load of the link, based on the specified threshold, intelligently distinguishes the unique selection or independent backhaul of the uplink remote unit group of the edge UE, and controls the PHY-H to uplink demodulation/decoding of a group of DPG or more of the edge UE. Group uplink DPG demodulation and decoding.

As shown in Figure 9, the host unit includes UE location management subsystem, Enhanced Common Public Radio Interface (eCPRI), scheduling subsystem, user uplink intelligent selection subsystem, and high-level physical layer sub-systems. In addition to the system, it also includes the operation and maintenance management subsystem (Operation Administration and Maintenance, OAM), the media access control layer subsystem (Media Access Control, MAC), the radio link control protocol layer subsystem, and the packet data convergence protocol layer subsystem (Packet Data Convergence Protocol, PDCP), Service Data Adaptation Protocol (SDAP), Layer 3 (Layer 3) and S1/NG interface subsystems. Among them, scheduling subsystem, media intervention The control layer subsystem, the radio link control protocol layer (Radio Link Control, RLC) subsystem, the packet data convergence protocol layer subsystem, the service data adaptive protocol layer subsystem, the layer 3 subsystem and the interface subsystem all belong to the wireless interface. Network access protocol stack subsystem. Among them, the operation and maintenance management subsystem is used to manage all software, configuration management, fault management, and performance management; the media intervention control layer subsystem and the wireless link control protocol subsystem are used to control the wireless access network protocol stack. The system and the data transmission time interval time sequence perform related data processing; specifically, the packet data convergence protocol layer subsystem is used to protect data integrity during transmission, air interface encryption, and compression of Internet Protocol address headers; services The data adaptive protocol layer subsystem is used to manage the mapping between the address flow of each networking protocol and the radio bearer; the scheduling subsystem is used to manage and schedule air interface resources; the layer 3 subsystem is used to handle wireless resource control Protocol signaling, management of the radio resources of the long-term evolution system; interface subsystem, used to process the control signaling of the core network, and process the tunnel data.

Among them, the expansion unit includes a public wireless interface specification interface subsystem and an operation and maintenance management subsystem in addition to the above-mentioned remote unit group management subsystem, enhanced public wireless interface subsystem, and low-level physical layer (PHY-L) subsystem. Among them, the low-level physical layer (PHY-L) subsystem is used to perform low-level physical layer processing on the uplink and downlink data of the UE; the remote unit group management subsystem is used to perform uplink services on the scheduling information on the host unit side Remote unit group management of data and downlink service data; enhanced public radio interface specification interface subsystem for data transmission between the host unit and expansion unit; common radio interface specification interface (CPRI) subsystem for remote unit and The expansion unit transmits data. Among them, PHY-H functions include channel estimation/equalization, layer mapping, modulation and demodulation, scrambling/descrambling, rate matching, codec functions, and PHY-L functions include IFFT/FFT, CP addition/removal, RE mapping/ Demapping and precoding functions.

Among them, the remote unit includes a CPRI interface subsystem, an RF subsystem, and an OAM subsystem. The RF subsystem provides radio frequency signal processing (such as analog-to-digital conversion), and transmits and receives signals through an antenna; the CPRI interface subsystem implements CPRI-based communication with CP IQ data streaming.

In addition, as shown in Figure 10, the host unit can also be divided into a centralized unit (CU) and a distributed unit (DU). The CU is responsible for implementing PDCP, SDAP, and radio resource control (Radio Resource Control, RRC) layers. Protocol function: DU is responsible for implementing RLC and MAC protocol functions. Among them, CU and DU can be deployed together or separately.

The embodiment of the present application also provides a base station system. In the system, if the aforementioned UE is an edge user, the location of the UE is located between multiple remote unit groups; if the location of the UE is located at the center of a remote unit group, then The UE is the central user.

In this embodiment, the UE and the serving remote unit group are in a different positional relationship, and the UE is divided into different users, that is, edge users or central users. For example, as shown in FIG. 11, four scenarios of different UE positions are provided:

(1) UE0 is located at the center of a remote unit group (DPG1), and it is determined that it does not belong to the edge UE;

(2) UE1 is located between two remote unit groups (DPG1 and DPG2), and the two remote unit groups (DPG1 and DPG2) are connected to the same extension unit (CP) and belong to edge UEs;

(3) UE2 is located between the two remote unit groups (DPG2 and DPG3). The two remote unit groups (DPG2 and DPG3) are connected to different extension units (CP), and the extension units (CP) are at a level The connection relationship belongs to the edge UE;

(4) UE3 is located between the two remote unit groups (DPG3 and DPG4). The two remote unit groups (DPG3 and DPG4) are connected to different extension units (CP). The extension units (CP) are non-level The association relationship belongs to the edge UE.

In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. 12. The computer equipment includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer program is executed by the processor to realize a data transmission method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, or it can be a button, a trackball or a touchpad set on the housing of the computer equipment , It can also be an external keyboard, touchpad, or mouse.

Those skilled in the art can understand that the structure shown in FIG. 12 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may Including more or fewer parts than shown in the figure, or combining some parts, or having a different arrangement of parts.

In one embodiment, a computer device is provided, including a memory and a processor, and a computer program is stored in the memory, and the processor implements the following steps when the processor executes the computer program:

According to the signal transmission quality data of multiple serving remote unit groups and the UE, determine whether the UE is an edge user; the edge user is a user located between multiple remote unit groups;

If the UE is an edge user, determine the current serving remote unit group of the UE according to the current load of the cell where the UE is located and various signal transmission quality data;

The uplink scheduling information of the UE is transmitted to the target extension unit; the target extension unit indicates the extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit to upload the currently serving remote unit group according to the uplink scheduling information The uplink data of the UE is processed, and the processed uplink data is uploaded to the host unit.

Or, when the processor executes the computer program, the following steps are implemented:

Receive the uplink scheduling information of the edge user sent by the host unit; the edge user is the user located between multiple remote unit groups;

According to the uplink scheduling information, process the uplink data of the UE uploaded by the current serving remote unit group of the edge user, and upload the processed uplink data to the host unit; the current serving remote unit group is based on the current load of the cell where the edge user is located The service remote unit group of the edge user is determined by the signal transmission quality data of the multiple service remote unit groups of the edge user.

The implementation principle and technical effect of a computer device provided by the foregoing embodiment are similar to those of the foregoing method embodiment, and will not be repeated here.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

According to the signal transmission quality data of multiple serving remote unit groups and the UE, determine whether the UE is an edge user; the edge user is a user located between multiple remote unit groups;

If the UE is an edge user, determine the current serving remote unit group of the UE according to the current load of the cell where the UE is located and various signal transmission quality data;

The uplink scheduling information of the UE is transmitted to the target extension unit; the target extension unit indicates the extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit to upload the currently serving remote unit group according to the uplink scheduling information The uplink data of the UE is processed, and the processed uplink data is uploaded to the host unit.

Or, the following steps are implemented when the computer program is executed by the processor:

Receive the uplink scheduling information of the edge user sent by the host unit; the edge user is the user located between multiple remote unit groups;

According to the uplink scheduling information, process the uplink data of the UE uploaded by the current serving remote unit group of the edge user, and upload the processed uplink data to the host unit; the current serving remote unit group is based on the current load of the cell where the edge user is located The service remote unit group of the edge user is determined by the signal transmission quality data of the multiple service remote unit groups of the edge user.

The foregoing embodiment provides a computer-readable storage medium, and its implementation principle and technical effect are similar to those of the foregoing method embodiment, and details are not described herein again.

A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage. In the medium, when the computer program is executed, it may include the procedures of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and/or volatile memory. Non-volatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not a limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Channel (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered as the range described in this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims (20)

1. A data transmission method includes the following steps:

   Determine whether the UE is an edge user according to the signal transmission quality data of the multiple serving remote unit groups and the user terminal UE; the edge user is a user located between the multiple remote unit groups;

   If the UE is an edge user, determine the currently serving remote unit group of the UE according to the current load of the cell where the UE is located and each of the signal transmission quality data;

   The uplink scheduling information of the UE is transmitted to the target extension unit; the target extension unit represents the extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit according to the The uplink scheduling information processes the uplink data of the UE uploaded by the currently serving remote unit group, and uploads the processed uplink data to the host unit.
2. The data transmission method according to claim 1, wherein the determining whether the UE is an edge user according to the signal transmission quality data of multiple serving remote unit groups and the UE comprises:

   Acquiring signal transmission quality data of multiple serving remote unit groups corresponding to the UE;

   Acquiring the difference between each of the signal transmission quality data;

   If the increasing magnitude of each difference meets a preset magnitude rule, it is determined that the UE is an edge user; the preset magnitude rule is used to indicate the magnitude change rule of each of the signal transmission quality data.
3. The data transmission method according to claim 1 or 2, wherein the determining the current serving remote unit group of the UE according to the current load of the cell where the UE is located and each of the signal transmission quality data includes:

   Acquiring the current load of the cell where the UE is located; the current load includes base station load and fronthaul link real-time bandwidth load;

   If the load is greater than or equal to the preset load threshold, determining the serving remote unit group corresponding to the largest signal transmission quality data as the current serving remote unit group;

   If the load is less than the preset load threshold, the serving remote unit group corresponding to the signal transmission quality data greater than the preset signal transmission quality threshold is determined as the currently serving remote unit group.
4. The data transmission method according to claim 3, wherein the signal transmission quality data is determined based on sounding reference signal data, or determined based on preamble data obtained by a physical random access channel.
5. The data transmission method according to claim 1, wherein the method further comprises:

   The downlink scheduling information and downlink data of the UE are transmitted to the target extension unit; the downlink scheduling information is used to instruct the target extension unit to process the downlink data according to the downlink scheduling information, and perform the processing The downlink data of is transmitted to the UE through the currently serving remote unit group.
6. The data transmission method according to claim 5, wherein the uplink scheduling information is used to instruct the target extension unit to perform data transmission of the UE uploaded by the currently serving remote unit group according to the uplink scheduling information. Uplink data is processed at the low-level physical layer, and the processed uplink data is uploaded to the host unit;

   The downlink scheduling information is used to instruct the target extension unit to perform low-layer physical layer processing on the downlink data according to the downlink scheduling information, and transmit the processed downlink data to the currently serving remote unit group. UE.
7. The data transmission method according to claim 1, wherein the method further comprises:

   Receive the processed uplink data uploaded by the target extension unit, and perform high-level physical layer processing on the processed uplink data uploaded by the target extension unit.
8. A data transmission method includes the following steps:

   Receiving uplink scheduling information of an edge user sent by the host unit; the edge user is a user located between multiple remote unit groups;

   Process the uplink data uploaded by the currently serving remote unit group of the edge user according to the uplink scheduling information, and upload the processed uplink data to the host unit; the currently serving remote unit group is based on the The current load of the cell where the edge user is located and the signal transmission quality data of the multiple serving remote unit groups of the edge user are determined.
9. The data transmission method according to claim 8, wherein the method further comprises:

   Receiving the downlink scheduling information and downlink data of the edge user transmitted by the host unit;

   The downlink data is processed according to the downlink scheduling information, and the processed downlink data is transmitted to the edge user through the currently serving remote unit group.
10. The data transmission method according to claim 9, wherein both the uplink data and the downlink data are processed by a low-level physical layer.
11. The data transmission method according to any one of claims 8-10, wherein the signal transmission quality data is determined based on preamble data obtained by a physical random access channel, or determined based on sounding reference signal data. .
12. The data transmission method according to any one of claims 8-10, wherein the number of remote unit groups currently serving by the edge user is at least two.
13. A base station system includes: a host unit, an extension unit, and a remote unit; the host unit is connected to at least one of the extension units, and each extension unit is connected to a plurality of remote unit groups; wherein, each remote unit The end unit group includes at least one remote unit;

    The host unit is configured to determine whether the UE is an edge user according to the signal transmission quality data of multiple serving remote unit groups and the UE, and when the UE is an edge user, according to the current status of the cell where the UE is located The load and each of the signal transmission quality data determines the currently serving remote unit group of the UE, and then transmits the uplink scheduling information of the currently serving remote unit group of the UE to the target extension unit; the edge user is located in the multiple Users between two remote unit groups; the target extension unit indicates an extension unit connected to the currently serving remote unit group; the uplink scheduling information is used to instruct the target extension unit to pair according to the uplink scheduling information Processing the UE uplink data uploaded by the currently serving remote unit group, and uploading the processed uplink data to the host unit;

    The extension unit is configured to receive the uplink scheduling information of the currently serving remote unit group of the edge user sent by the host unit; and process the uplink data of the currently serving remote unit group according to the uplink scheduling information, Then upload the processed uplink data to the host unit; the currently serving remote unit group is based on the current load of the cell where the edge user is located and the signal transmission quality data of each serving remote unit group of the edge user definite;

    The remote unit is used to implement radio frequency signal transceiving functions.
14. The base station system according to claim 13, wherein the extension unit is further configured to receive the edge user downlink scheduling information and downlink data transmitted by the host unit, and to perform data processing on the downlink according to the downlink scheduling information. The data is processed at a low-level physical layer, and the processed downlink data is transmitted to the edge user through the currently serving remote unit group.
15. The base station system according to claim 14, wherein the extension unit performs low-level physical layer processing on both the uplink data and the downlink data.
16. The base station system according to any one of claims 13-15, wherein an enhanced public wireless interface is used for data transmission between the host unit and the extension unit; the extension unit and the remote unit Use a public wireless interface for data transmission between.
17. The base station system according to any one of claims 13-15, wherein the host unit includes a UE location management subsystem, an enhanced public radio interface subsystem, a scheduling subsystem, a user uplink intelligent selection subsystem, and a high-level Physical layer subsystem;

    The UE location management subsystem is used to locate the service remote unit group of the UE and process data transmitted by the physical layer subsystem in the extension unit;

    The enhanced public wireless interface subsystem is used to analyze and encapsulate data through the enhanced public wireless interface specification protocol, and perform data transmission with the expansion unit through the enhanced public wireless interface specification;

    The scheduling subsystem is used to manage and schedule air interface resources;

    The user uplink intelligent selection subsystem is used to monitor the current load of the cell where the UE is located and the signal transmission quality data of the multiple serving remote unit groups corresponding to the UE, and determine whether the UE is an edge user or not, so as to determine The remote unit group to be transmitted;

    The high-level physical layer subsystem is used to perform high-level physical layer processing on the service data of the UE.
18. The base station system according to any one of claims 13-15, wherein the expansion unit includes a remote unit group management subsystem, an enhanced public wireless interface subsystem, and a low-level physical layer subsystem;

    The remote unit group management subsystem is used to perform uplink service data and downlink service data remote unit group management on the scheduling information on the host unit side;

    The enhanced public wireless interface subsystem is used for data transmission between the host unit and the extension unit;

    The low-layer physical layer subsystem is used to perform low-layer physical layer processing on the uplink and downlink data of the UE.
19. A computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method according to any one of claims 1 to 12 when the computer program is executed.
20. A computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are realized.

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