CN110572847B

CN110572847B - Data transmission method, system, computer device and storage medium

Info

Publication number: CN110572847B
Application number: CN201910936129.6A
Authority: CN
Inventors: 黄鹏飞; 区洋; 丁宝国
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-05-28
Anticipated expiration: 2039-09-29
Also published as: WO2021056848A1; CN110572847A

Abstract

The host unit completes intelligent selection of the remote unit group to be transmitted of the UE through signal transmission quality data of a plurality of service remote unit groups corresponding to the UE and the current load condition of a cell, and transmits the data back to the host unit after processing an uplink data signal target extension unit of the selected remote unit group to be transmitted. In the method, the host unit realizes intelligent selection of the uplink service remote unit group of the UE, and different remote unit groups to be transmitted are determined under different conditions of cell loads, so that the edge users can be ensured to upload maximum data according to actual resource capacity, and the uplink performance of the edge users covered by the remote unit groups in an overlapping manner is greatly improved.

Description

Data transmission method, system, computer device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission method, a data transmission system, a computer device, and a storage medium.

Background

The distributed pico-Base station is a novel indoor wireless distribution system for indoor optical fiber or five-line wiring, and adopts a Base Band Unit (BBU) + Radio Unit (RRU) structure.

The system architecture of the distributed pico-base station is composed of a host unit, an extension unit and a remote unit, and various options are provided for a function segmentation mode between the BBU and the RRU based on a Third Generation Partnership Project (3 GPP) protocol as a reference, namely in the prior art, the host unit, the extension unit and the remote unit are functionally divided based on the option8, then the host unit completes modulation and demodulation of baseband signals, the extension unit is responsible for forwarding and aggregation of uplink and downlink signals, and then the remote unit receives/transmits uplink and downlink radio frequency signals, so that continuous coverage of an indoor environment is realized.

However, when the host unit processes the uplink data of the remote units, the host unit merges the data of all the remote units, which results in a multiple rise in the background noise, and the performance of the edge user under the coverage of a plurality of remote unit groups is poor.

Disclosure of Invention

Therefore, it is necessary to provide a data transmission method, a system, a computer device, and a storage medium for solving the technical problem that when the host unit processes uplink data of a remote unit, the performance of an edge user under coverage of a plurality of remote unit groups is poor.

In a first aspect, an embodiment of the present application provides a data transmission method, where the method includes:

determining whether the UE is an edge user or not according to the signal transmission quality data of the plurality of serving remote end unit groups and the UE; the edge users are users located among a plurality of remote end unit groups;

if the UE is an edge user, determining a current service remote end unit group of the UE according to the current load of a cell where the UE is located and the transmission quality data of each signal;

transmitting uplink scheduling information of the UE to a target extension unit; the target expansion unit represents an expansion unit connected with the current service remote unit group; and the uplink scheduling information is used for indicating the target extension unit to process the uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information and upload the processed uplink data to the host unit.

In one embodiment, the determining whether the UE is an edge user according to the signal transmission quality data of the multiple remote service unit groups and the UE includes:

acquiring signal transmission quality data of a plurality of serving remote unit groups corresponding to the UE;

acquiring a difference value between signal transmission quality data;

if the increasing amplitude of each difference value meets a preset amplitude rule, determining the UE as an edge user; the preset amplitude rule is used for indicating the amplitude change rule of each signal transmission quality data.

In one embodiment, the determining, according to the current load of the cell in which the UE is located and the transmission quality data of each signal, a current serving remote unit group of the UE includes:

acquiring the current load of a cell in which the UE is positioned; the current load comprises a base station load and a forward link real-time bandwidth load;

if the load is greater than or equal to the preset load threshold, determining the service remote unit group corresponding to the maximum signal transmission quality data as the current service remote unit group;

and if the load is smaller than the preset load threshold value, determining the service remote end unit group corresponding to the signal transmission quality data larger than the preset signal value as the current service remote end unit group.

In one embodiment, the signal transmission quality data is determined according to sounding reference signal data or preamble data acquired according to a physical random access channel.

In one embodiment, the method further comprises:

transmitting downlink scheduling information and downlink data of the UE to a target extension unit; the downlink scheduling information is used for indicating the target extension unit to process downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the UE through the current serving remote unit group.

In one embodiment, the uplink scheduling information and the downlink scheduling information each include an identifier of a current serving remote unit group.

In one embodiment, the uplink scheduling information is used to instruct the target extension unit to perform low-level physical layer processing on uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information, and upload the processed uplink data to the host unit;

the downlink scheduling information is used for indicating the target extension unit to perform low-level physical layer processing on the downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the UE through the current serving remote unit group.

In one embodiment, the target extension unit performs data transmission with the host unit through an enhanced public wireless interface; the target extension unit transmits with the current serving remote unit group via a common wireless interface.

In one embodiment, the method further comprises:

and receiving the processed uplink data uploaded by the target expansion unit, and performing high-level physical layer processing on the processed uplink data uploaded by the target expansion unit.

In one embodiment, if the UE is an edge user, the UE is located between a plurality of remote unit groups; and if the position of the UE is located in the center of a remote unit group, the UE is a central user.

In one embodiment, if the UE is an edge user, the number of current serving remote unit groups is one; if the UE is a central user, the number of the current serving remote unit groups is at least two.

In a second aspect, an embodiment of the present application provides a data transmission method, where the method includes:

receiving uplink scheduling information of the edge user sent by a host unit; the edge users are users located among a plurality of remote end unit groups;

processing uplink data of the UE uploaded by a current service remote unit group of an edge user according to the uplink scheduling information, and uploading the processed uplink data to a host unit; the current service remote unit group is the service remote unit group of the edge user determined according to the current load of the cell where the edge user is located and the signal transmission quality data of the plurality of service remote unit groups of the edge user.

In one embodiment, the method further comprises:

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

and processing the downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the edge user through the current service remote unit group.

In one embodiment, the processed uplink data is transmitted to the host unit over an enhanced public wireless interface; and transmitting the processed downlink data to the current serving remote unit group through a public wireless interface.

In one embodiment, the lower physical layer processing is performed for both the upstream data and the downstream data.

In one embodiment, the signal transmission quality data is determined according to preamble data acquired by a physical random access channel or is determined according to sounding reference signal data.

In a third aspect, an embodiment of the present application provides a base station system, including: a host unit, an expansion unit and a remote unit; the host unit is connected with at least one expansion unit, and each expansion unit is connected with a plurality of remote unit groups; wherein each remote unit group comprises at least one remote unit;

the host unit is used for determining whether the UE is an edge user according to the signal transmission quality data of the plurality of service remote end unit groups and the UE, determining the current service remote end unit group of the UE according to the current load of the cell where the UE is located and the signal transmission quality data when the UE is the edge user, and then transmitting the uplink scheduling information of the UE to the target expansion unit; the edge users are users located among a plurality of remote end unit groups; the target expansion unit represents an expansion unit connected with the current service remote unit group; the uplink scheduling information is used for indicating the target extension unit to process the UE uplink data uploaded by the current serving remote unit group according to the uplink scheduling information and uploading the processed uplink data to the host unit;

the extension unit is used for receiving the uplink scheduling information of the edge user sent by the host unit; processing uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information, and then uploading the processed uplink data to the host unit; the current service remote 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 each service remote end unit group of the edge user;

and the remote unit is used for realizing the function of receiving and transmitting the radio frequency signal.

In one embodiment, the extension unit is further configured to receive downlink scheduling information and downlink data of the edge user transmitted by the host unit, perform low-level physical layer processing on the downlink data according to the downlink scheduling information, and transmit the processed downlink data to the edge user through the current serving remote unit group.

In one embodiment, the expansion unit performs lower physical layer processing on both the uplink data and the downlink data.

In one embodiment, an enhanced public wireless interface is used for data transmission between the host unit and the extension unit; and a public wireless interface is adopted between the expansion unit and the remote unit for data transmission.

In one embodiment, 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 higher physical layer subsystem;

the UE position management subsystem is used for positioning the service remote end unit group of the UE and processing data transmitted by a physical layer subsystem in the extension unit;

the enhanced public wireless interface subsystem is used for analyzing and packaging data through an enhanced public wireless interface specification protocol and transmitting the data through an enhanced public wireless interface specification with the extension unit;

the scheduling subsystem is used for managing and scheduling the air interface resources;

the system comprises a user uplink intelligent selection subsystem, a remote end unit group selection subsystem and a control subsystem, wherein the user uplink intelligent selection subsystem is used for monitoring the current load of a cell where the UE is located and the signal transmission quality data of a plurality of service remote end unit groups corresponding to the UE, judging whether the UE is an edge user or not, and determining the remote end unit group to be transmitted;

and the high-level physical layer subsystem is used for performing high-level physical layer processing on the service data of the UE.

In one embodiment, the extension unit comprises a remote unit group management subsystem, an enhanced public wireless interface subsystem and a lower physical layer subsystem;

the remote unit group management subsystem is used for performing remote unit group management on uplink service data and downlink service data for the scheduling information of the host unit side;

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

and the low-layer physical layer subsystem is used for carrying out low-layer physical layer processing on the uplink and downlink data of the UE.

In a fourth aspect, an embodiment of the present application provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of any one of the methods provided in the embodiments of the first aspect and the second aspect when executing the computer program.

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

In the data transmission method, the system, the computer device, and the storage medium provided in the embodiments of the present application, the host unit completes intelligent selection of the remote unit group to be transmitted of the UE by performing signal transmission quality data of a plurality of serving remote unit groups corresponding to the UE and current load conditions of a cell, and transmits the uplink data signal to the host unit after processing the uplink data signal target extension unit of the selected remote unit group to be transmitted. In the method, the host unit realizes intelligent selection of the uplink service remote unit group of the UE, and different remote unit groups to be transmitted are determined under different conditions of cell loads, so that the edge users can be ensured to upload maximum data according to actual resource capacity, and the uplink performance of the edge users covered by the remote unit groups in an overlapping manner is greatly improved.

Drawings

FIG. 1 is a diagram of an application environment of a data transmission method according to an embodiment;

fig. 2 is a flowchart illustrating a data transmission method according to an embodiment;

fig. 3 is a flowchart illustrating a data transmission method according to an embodiment;

fig. 4 is a flowchart illustrating a data transmission method according to an embodiment;

fig. 5 is a flowchart illustrating a data transmission method according to an embodiment;

fig. 6 is a flowchart illustrating a data transmission method according to an embodiment;

FIG. 7 is an interaction diagram of a data transmission method, according to an embodiment;

fig. 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 functional partitioning diagram of a host unit, according to an embodiment;

fig. 11 is a schematic diagram of a UE location scenario according to an embodiment;

FIG. 12 is a diagram illustrating an internal structure of a computer device according to an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The data transmission method provided by the present application can be applied to a base station system as shown in fig. 1, where the system includes a host unit, an extension unit, and a remote unit, where the host unit is communicatively connected to a plurality of extension units, and each extension unit is communicatively connected to at least one remote unit. The plurality of extension units may be in a parallel relationship, such as extension unit 1 and extension unit 2, or in a cascade relationship, such as extension unit 1 and extension unit 3; all remote units connected to the same expansion unit may form one remote unit group, and remote units connected to the same expansion unit may also be combined to form a plurality of remote unit groups. Each expansion unit may be connected to at least one remote unit group (not limited to the one shown in fig. 1), such as remote unit group 1 to which expansion unit 1 is connected; each remote unit group may include at least one remote unit therein. The host unit mainly completes the modulation and demodulation of baseband signals, the expansion unit mainly completes the forwarding and convergence of uplink/downlink signals, and the remote unit mainly completes the radio frequency receiving/radio frequency sending of the uplink/downlink signals; generally, the host unit is communicatively connected to the core network, and the remote unit is communicatively connected to the UE, so that the base station system can implement communication between the host unit and the UE, communication between the core network and the UE, communication between the UE and the UE, and the like. The UE may be, but not limited to, a smart phone, a computer device, a portable wearable device, an internet of things device, a vehicle, an unmanned aerial vehicle, an industrial device, and other devices having a radio frequency transceiving function.

Embodiments of the present application provide a data transmission method, a system, a computer device, and a storage medium, which aim to solve the technical problem that when a host unit processes uplink data of a remote unit, performance of an edge user under coverage of a plurality of remote unit groups is poor. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of 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 in the present application, the execution main bodies in fig. 2 to fig. 4 are host units, and the execution main bodies in fig. 5 to fig. 6 are extension units. The execution main bodies in fig. 2 to fig. 6 may also be data transmission devices, and the devices may be implemented by software, hardware, or a combination of software and hardware to become part or all of data transmission.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

The side of the execution body that is the host unit is explained in detail below.

In an embodiment, fig. 2 provides a data transmission method, where this embodiment relates to a specific process in which a host unit determines whether a User Equipment (UE) is an edge User, then determines a current serving remote unit group of the UE, and performs uplink transmission on data of the current serving remote unit group, and as shown in fig. 2, the method includes:

s101, determining whether the UE is an edge user or not according to signal transmission quality data of a plurality of service remote end unit groups and the UE; an edge user is a user located between a plurality of remote cell groups.

In this embodiment, the serving remote unit group represents a remote unit group serving the UE, where each serving remote unit group includes a plurality of remote units, and it should be noted that each remote unit included in the remote unit group may have correlation in spatial position, for example, a distance between each remote unit and each remote unit is smaller than a preset distance threshold, or both remote units are in an area of a certain preset size. Wherein the signal transmission quality data characterizes signal data of a signal quality condition 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. The edge user indicates that the UE is located between multiple remote service user groups, the edge position is relative to the center user, and the center user indicates that the UE is located in the center of a remote service unit group.

For example, in practical application, the host unit determines whether the UE is an edge user according to the signal transmission quality data of the multiple remote serving cell groups and the UE, where the determination may be that the host unit determines the signal strength of each signal transmission quality data, and determines whether the UE is an edge user according to the signal strength of the UE transmitted by the multiple remote serving cell groups. For example, the host unit determines whether the UE is located between multiple remote service unit groups or in the center of a remote service unit group according to the signal quality strength of the UE transmitted by the multiple remote service unit groups, and if the UE is located between the multiple remote service unit groups, the host unit determines that the UE is an edge user, otherwise, the host unit determines that the UE is a center user.

And S102, if the UE is an edge user, determining a current service remote end unit group of the UE according to the current load of the cell where the UE is located and the transmission quality data of each signal.

In the step S101, if the determined UE is an edge user, the host unit determines a remote service unit group to be transmitted according to the current load of the cell in which the UE is located and the transmission quality data of each signal. The current serving remote unit group indicates a target serving remote unit group for which the host unit needs to receive and process data, and this is equivalent to that, if the UE is an edge user, signal data sent by the UE may be transmitted to the host unit through a plurality of serving remote unit groups, but the host unit is under environmental restrictions, for example, the influence of cell load, so that the host unit cannot receive and process data transmitted by all serving remote unit groups of the UE.

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

S103, transmitting the uplink scheduling information of the UE to a target expansion unit; the target expansion unit represents an expansion unit connected with the current service remote unit group; and the uplink scheduling information is used for indicating the target extension unit to process the UE uplink data uploaded by the current serving remote unit group according to the uplink scheduling information and upload the processed uplink data to the host unit.

Based on the determination of the current serving remote unit group in step S102, the host unit transmits the uplink scheduling information of the current serving remote unit group to the target extension unit. The uplink scheduling information includes time-frequency resource information (e.g., time-frequency resource location) allocated by the host unit to the current serving remote unit group and identification information of the current serving remote unit group, and is used to instruct the target extension unit to perform data transmission on the current serving remote unit group and the host unit according to the time-frequency resource information, that is, the target extension unit processes uplink data uploaded by the current serving remote unit group, and uploads the processed uplink data to the host unit. The uplink data may be voice data, video data, web page data, etc., uplink control data, etc. It should be noted that, because one remote unit group may connect a plurality of extension units, that is, the target extension unit in this embodiment is one of the extension units connected to the current serving remote unit group, and a signal transmission link between a host unit connected to the target extension unit and the current serving remote unit group has the best signal quality, where the signal transmission link represents a link between the host unit, the extension unit, the remote unit, and the UE. It can be appreciated that the communication between the host unit and the current serving remote unit group is performed by the target extension unit, and communication with the UE by other non-target extension units is avoided, so as to improve high-quality, high-efficiency signal data transmission between the current serving remote unit group and the host unit.

In the data transmission method provided in this embodiment, the host unit completes intelligent selection of the remote unit group to be transmitted of the UE by performing signal transmission quality data of the multiple serving remote unit groups corresponding to the UE and current load conditions of the cell, and transmits the uplink data signal target extension unit of the selected remote unit group to be transmitted back to the host unit after processing the uplink data signal target extension unit. In the method, the host unit realizes intelligent selection of the uplink service remote unit group of the UE, and different remote unit groups to be transmitted are determined under different conditions of cell loads, so that the edge users can be ensured to upload maximum data according to actual resource capacity, and the uplink performance of the edge users covered by the remote unit groups in an overlapping manner is greatly improved.

On the basis of the foregoing embodiment, an embodiment of the present application further provides a data transmission method, which relates to a specific process in which a host unit determines whether a UE is an edge user, as shown in fig. 3, where the step S101 includes:

s201, acquiring signal transmission quality data of a plurality of remote service unit groups corresponding to the UE.

In this embodiment, the host unit obtains signal transmission quality data of a plurality of serving remote unit groups corresponding to the UE, where the signal transmission quality data represents a signal of a 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, a Sounding Reference Signal (SRS), or a preamble Signal uploaded through a Physical Random Access Channel (PRACH), and certainly, the Signal transmission quality data is not limited to the Sounding Reference Signal (SRS) and the preamble Signal, and may also be other signals that can represent a Signal quality condition between the remote unit and the UE.

For example, in practical applications, the step of acquiring, by the host unit, the signal transmission quality data of the serving remote unit group of the UE may be to determine the serving remote unit group corresponding to the UE, and then acquire the signal transmission quality data of the serving remote unit group. The mode of determining, by the host unit, the serving remote unit group corresponding to the UE may be determined according to location information of the UE, or may be determined according to a signal of the UE, or may be other modes, which is not limited in this embodiment.

S202, obtaining a difference between the signal transmission quality data.

Based on the plurality of signal transmission quality data acquired in the above step S201, the host unit acquires a difference between the plurality of signal transmission quality data.

S203, if the increasing amplitude of each difference value meets a preset amplitude rule, determining the UE as an edge user; the preset amplitude rule is used for indicating the amplitude change rule of each signal transmission quality data.

According to the difference between the signal transmission quality data obtained in S202, the host unit determines whether the increase amplitude of each difference satisfies a preset amplitude rule, where the preset amplitude rule is used to indicate an amplitude variation rule of each signal transmission quality data, and if the increase amplitude of each difference satisfies the preset amplitude rule, determines that the UE is an edge user.

Optionally, in an embodiment, if the UE is an edge user, the location of the UE is located between a plurality of remote unit groups; and if the position of the UE is located in the center of a remote unit group, the UE is a central user.

For example, if the increase of each difference is a gradual increase, it indicates that the signal data strengths of the UEs received by the multiple serving remote unit groups do not differ greatly, in this case, that indicates that the UE is located between the multiple serving remote unit groups, the UE is an edge user. If the increase of each difference is one of the differences is much larger than the other, it indicates that the signal strength of one serving cell unit group is much larger than the signal strengths of the other serving remote unit groups, i.e. it indicates that the UE is located in the center of the serving remote unit group with the strongest signal strength, and the UE is the central user.

In the data transmission method provided in this embodiment, the host unit determines, according to the difference between the signal transmission quality data of the plurality of remote unit groups, a change rule of an increase range of each difference, and determines that the UE is an edge user if the change rule of the increase range satisfies a preset range rule. Therefore, the change rule of the user position is positioned according to the strength of the signal, and then the edge user is determined according to the change rule, so that the judgment accuracy of the edge user is greatly improved.

In addition, in the embodiment of fig. 2, an uplink procedure of data is described, in practical applications, the data further relates to a downlink transmission procedure, where the downlink procedure represents a data transmission procedure from a host unit to a UE, and for the downlink data transmission procedure, the present application provides an embodiment, where the method further includes: transmitting downlink scheduling information and downlink data of the UE to a target extension unit; and the target extension unit is used for processing the downlink data according to the downlink scheduling information and transmitting the processed downlink data to the UE through the current serving remote unit group.

The host unit sends downlink scheduling information and downlink service data of the UE to the target expansion unit, the target expansion unit processes the downlink service data according to downlink time-frequency resources distributed to the UE by the host unit carried in the downlink scheduling information after receiving the downlink scheduling information and the downlink service data, and then the processed downlink service data is transmitted to the UE through the current serving remote unit group. The downlink service data is data to be sent to the UE by the host unit, such as voice data, video data, and web page data sent by the core network. The data processing of the target expansion unit includes, but is not limited to, fourier transform, channel estimation, equalization, descrambling, decoding, RE demapping, and the like.

Optionally, in an embodiment, the target extension unit is configured to perform lower physical layer processing on the uplink data and the downlink data. In both the uplink process and the downlink process, the target expansion unit performs low-level physical layer processing on the data and then transmits the data to the host unit or the remote unit to be transmitted. Wherein the lower physical layer includes but is not limited to FFT, RE demapping processing, and the processed data may be SRS symbol data.

Optionally, in an embodiment, the uplink scheduling information and the downlink scheduling information each include an identifier of a current serving remote unit group. The identifier of the current serving remote unit group is used to instruct the target extension unit to determine which of the current serving remote unit group is, where the identifier may be in any form, such as numbers, letters, or a combination thereof, and this is not limited in this embodiment of the application. Therefore, the target extension unit can be quickly and efficiently positioned to the accurate current service remote unit group.

Optionally, in one embodiment, the target extension unit performs data transmission with the host unit through an enhanced public wireless interface; the target extension unit transmits with the current serving remote unit group via a common wireless interface. The target extension unit is in communication connection with the remote unit group through a Public wireless Interface, that is, the target extension unit transmits the processed downlink service data to the remote unit group to be served through a Common Public Radio Interface (CPRI). The target extension unit and the host unit are communicatively connected through an Enhanced Common Radio Interface, that is, the target extension unit transmits the processed uplink service data back to the host unit through an Enhanced Common Radio Interface specification (eCPRI). This can greatly reduce the transmission bandwidth requirements. In the uplink process, the data volume of the uplink service data received by the host unit is only the number of the designated remote unit groups to be transmitted, so that the transmission data volume of the uplink service data is reduced, and the requirement on uplink forward transmission bandwidth is further reduced.

In the data transmission method provided by this embodiment, the extension unit and the remote unit use a common public radio interface for transmission, which effectively reduces the design complexity and cost of the remote unit, and the host unit and the extension unit use an enhanced public radio interface for transmission, which greatly reduces the requirement for transmission bandwidth. In addition, the embodiment of the application sinks the low-layer physical layer function into the extension unit for realization, and the extension unit has independent demodulation and decoding capability, thereby greatly reducing the design cost of the host unit.

It should be noted that, in the downlink or uplink data transmission process, the UE, the remote unit, the serving remote unit group, the extension unit, and the like are all assigned with unique identifiers, so as to facilitate the correctness and efficiency of data transmission in the uplink and downlink data transmission process. For example: the remote unit group has a group identifier, and the UE has an intra-cell unique identifier, and in practical application, the identifier may be allocated according to circumstances, which is not limited in this embodiment. It should be additionally noted that, in the present application, the data of the serving remote unit group and the data of the extension unit both represent uplink and downlink service data of the UE, and uplink data of the UE is uploaded to the extension unit through the serving remote unit group and then uploaded to the host unit, or the host unit downloads downlink data of the UE to the serving remote unit group through the extension unit and then transmits the downlink data to the UE.

As to the process in which the host unit determines the current serving remote unit group according to the current load of the cell in which the UE is located in the foregoing embodiment, this embodiment further provides a data transmission method, as shown in fig. 4, where the step S102 includes:

s301, acquiring the current load of a cell in which the UE is located; the current load comprises a base station load and a forward link real-time bandwidth load.

In this embodiment, the host unit obtains a current load of a cell where the UE is located, where the current load includes a base station load and a current link real-time bandwidth load, for example, when determining the current load according to the base station load and the current link real-time bandwidth load, corresponding weights may be set respectively, and then the current load is obtained by calculating a weighted sum. The method for acquiring the base station load and the real-time bandwidth load of the forward link by the host unit may be to monitor the service carrying conditions of the current base station and the forward link by detection and then convert the service carrying conditions into a load value, or may be other methods, which is not limited in this embodiment.

S302, if the load is greater than or equal to the preset load threshold, determining the serving remote unit group corresponding to the maximum 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 a preset load threshold, and if the load is greater than or equal to the preset load threshold, ranks the signal transmission quality data of each serving remote unit group obtained in S101 from large to small, and determines the serving remote unit group corresponding to the largest signal transmission quality data as the current serving remote unit group.

S303, if the load is smaller than the preset load threshold, determining the serving remote unit group corresponding to the signal transmission quality data larger 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 a preset critical value for selecting better signal transmission quality data, which is equivalent to that, under the condition of smaller load and more sufficient remaining resources, a plurality of groups of serving remote unit groups with better signal quality are selected to be determined as the current serving remote unit group, and the plurality of groups are determined according to the preset signal value, and all the serving remote unit groups corresponding to the signal transmission quality data greater than the preset signal value can be transmitted.

In the data transmission method provided in this embodiment, the current serving remote unit group is determined according to the current load of the cell, and when the load is high, only one uplink signal of the UE needs to be uploaded, so that it is ensured that the forward bandwidth of the whole cell does not overflow, and multiple uplink signals of the UE are selected for transmission at a low load, so that the uplink performance of the user at the lower edge covered by the serving remote unit group in an overlapping manner can be improved.

In addition, in an embodiment, the host unit in all the above embodiments performs a high-layer physical layer process on the processed uplink data uploaded by the target extension unit, that is, the high-layer physical layer is implemented in the host unit, where the high-layer physical layer (PHY-H) process includes, but is not limited to, channel estimation, equalization, descrambling, decoding, and the like, and the data processed by the high-layer physical layer is bit data.

In the following, a detailed description is given of an embodiment in which the execution main body is the target extension unit side, where it is to be noted that, since there are repeated terms, steps or beneficial effects between the target extension unit side embodiment and the host unit side embodiment, for these repeated parts, the description is already given in the host unit side embodiment, and details will not be repeated in the target extension unit side embodiment.

In an embodiment, fig. 5 provides a data transmission method, where this embodiment relates to a specific process in which a target extension unit transmits uplink data to a host unit according to uplink scheduling information of a serving remote unit group to be transmitted, which is sent by the host unit, as shown in fig. 5, the method includes:

s401, receiving the uplink scheduling information of the edge user sent by the host unit; an edge user is a user located between a plurality of remote cell groups.

In this embodiment, the target extension unit receives the uplink scheduling information of the edge user sent by the host unit, where the edge user is a user located among a plurality of remote unit groups. The uplink scheduling information carries uplink time-frequency resource information and an identifier of a current serving remote unit group.

S402, processing the uplink data of the UE uploaded by the edge user current service remote unit group according to the uplink scheduling information, and uploading 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 the plurality of serving remote unit groups of the edge user.

Based on the uplink scheduling information of the edge user received in the step S401, the target extension unit processes the uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information, and uploads 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 the plurality of serving remote unit groups of the edge user. Optionally, in an embodiment, the signal transmission quality data is preamble data acquired through a physical random access channel, or sounding reference signal data.

The embodiment provides a data transmission method. And 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 current 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 according to the signal transmission quality data of the plurality of serving remote unit groups of the edge user and the current cell load condition, different remote unit groups to be transmitted are determined under different cell load conditions, so that the edge user can be ensured to transmit maximum data according to the actual resource capacity, and the uplink performance of the edge user covered by the remote unit groups in an overlapping manner is greatly improved.

For the downlink procedure, in an embodiment, as shown in fig. 6, the method further includes:

s501, receiving downlink scheduling information and downlink data of the edge user transmitted by the host unit.

And the target extension unit receives the downlink scheduling information and the downlink data of the edge user transmitted by the host unit. The downlink scheduling information includes, but is not limited to, downlink time-frequency resource information and an identifier of a current serving remote unit group.

And S502, processing the downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the edge user through the current service far-end unit group.

And according to the downlink scheduling information, the target expansion unit processes the downlink data and transmits the processed downlink data to the edge user through the current service remote unit group. The downlink service data is data to be sent by the host unit to the edge user, such as voice data, video data, and web page data sent by the core network. The data processing of the target expansion unit includes, but is not limited to, fourier transform, channel estimation, equalization, descrambling, decoding, RE demapping, and the like.

Optionally, in an embodiment, the method is used for performing low-level physical layer processing on the uplink data and the downlink data. In both the uplink process and the downlink process, the target expansion unit performs low-level physical layer processing on the data and then transmits the data to the host unit or the remote unit to be transmitted. Wherein the lower physical layer includes but is not limited to FFT, RE demapping processing, and the processed data may be SRS symbol data.

Optionally, in one embodiment, data transmission is performed with the host unit through an enhanced public wireless interface; and transmitting with the current serving remote unit group through a public wireless interface. The target extension unit and the remote unit group are in communication connection through a public wireless interface, that is, the target extension unit transmits the processed downlink service data to the remote unit group to be served through the CPRI. The target expansion unit is in communication connection with the host unit through an enhanced public wireless interface, that is, the target expansion unit transmits the processed uplink service data back to the host unit through the eCPRI. This can greatly reduce the transmission bandwidth requirements. In the uplink process, the data volume of the uplink service data received by the host unit is only the number of the designated remote unit groups to be transmitted, so that the transmission data volume of the uplink service data is reduced, and the requirement on uplink forward transmission bandwidth is further reduced.

In addition, in an embodiment, if the UE is an edge user, the number of the current serving remote unit group is one; if the UE is a central user, the number of the current 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 between the plurality of remote unit groups; and if the position of the UE is located in the center of a remote unit group, the UE is a central user.

The UE can be divided into an edge user and a central user according to the position relation between the UE and the serving remote unit group, and if the UE is the edge user, the position of the UE is located among the plurality of remote unit groups; and if the position of the UE is located in the center of a remote unit group, the UE is a central user. And the number of the remote unit groups to be transmitted corresponding to the edge users and the central users is different. If the UE is an edge user, the number of the current serving remote unit groups is one; if the UE is a central user, the number of the current serving remote unit groups is at least two. In particular, the contents of the above data transmission method can be understood in conjunction with the base station system provided below, and the two can supplement each other and be referred to each other.

It should be understood that although the various steps in the flow charts of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.

An embodiment of the present application provides a base station system, including: a host unit, an expansion unit and a remote unit; the host unit is connected with at least one expansion unit, and each expansion unit is connected with a plurality of remote unit groups; wherein each remote unit group comprises at least one remote unit;

the host unit is used for determining whether the UE is an edge user according to the signal transmission quality data of a plurality of serving remote unit groups corresponding to the UE, determining the current serving remote unit group of the UE according to the current load of a cell where the UE is located and the signal transmission quality data when the UE is the edge user, and then transmitting the uplink scheduling information of the UE to the target expansion unit; the edge users are users located among a plurality of remote end unit groups; the target expansion unit represents an expansion unit connected with the current service remote unit group; the uplink scheduling information is used for indicating the target extension unit to process the uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information and uploading the processed uplink data to the host unit; the extension unit is used for receiving the uplink scheduling information of the edge user sent by the host unit; processing uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information, and then uploading the processed uplink data to the host unit; the current service remote 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 a plurality of service remote end unit groups of the edge user; and the remote unit is used for realizing the function of receiving and transmitting the radio frequency signal. Optionally, the extension unit is further configured to receive downlink scheduling information and downlink data of the edge user transmitted by the host unit, process the downlink data according to the downlink scheduling information and the downlink data, and transmit the processed downlink data to the edge user through the current remote service unit group. Optionally, the extension unit performs lower physical layer processing on both uplink data and downlink data. Optionally, an enhanced public wireless interface is used between the host unit and the extension unit for data transmission; and a public wireless interface is adopted between the expansion unit and the remote unit for data transmission.

In this embodiment, please refer to the base station system shown in fig. 1, where M remote units are connected to an extension unit connected to a host unit, where N remote units form a remote unit group, the base station system has K ═ M/N ] remote unit groups in total, and if the host unit communicates with a UE through L extension units, based on the base station system, the embodiment of the present application provides an embodiment of a data transmission process, and as shown in fig. 7, the data transmission process includes:

s01, the UE periodically transmits an SRS (sounding Reference Signal) Signal.

Specifically, the remote unit receives an RF signal of an SRS and then transmits the received RF signal to the extension unit, the extension unit performs radio frequency combining on the received SRS radio frequency signal, and the number of radio frequency combining is configured by an operation Administration and Maintenance subsystem (OAM) subsystem. The expansion unit performs PHY-L (low physical layer) processing, including FFT and RE demapping, on the radio frequency-combined SRS radio frequency signal to obtain SRS symbol data.

And S02, the extension unit combines the remote units by radio frequency to obtain a plurality of service remote unit groups.

And S03, the extension unit sends the SRS sign data to the host unit and carries the identification of the remote service 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, decoding, etc., to obtain SRS bit data.

S05, the host unit demodulates SRS symbols of the plurality of remote service unit groups to identify the edge UE.

S06, the UE sends a Scheduling Request (SR) on the PUCCH channel to request the network to allocate uplink resources.

Specifically, in this step, the same as S01, the extension unit receives the SR, the scheduling request signal is carried by a PUCCH (Physical Uplink Control CHannel), the radio frequency signals are then radio frequency combined, and the number of radio frequency combinations is configured by the OAM subsystem. And the expansion unit performs PHY-L processing on the SR radio frequency signal after the radio frequency combination to obtain SR PUCCH Bit data.

And S07, the expansion unit sends the SR PUCCH Bit data to the host unit and simultaneously carries the service remote unit group identification after radio frequency combination.

S08, the host unit receives the SR PUCCH Bit data, and notifies a Media Access Control (MAC) subsystem to perform uplink resource allocation.

S09, the host unit judges the base station load and the effective bandwidth of the forward link of the expansion unit in real time, and whether the uplink performance condition of the edge UE is satisfied.

S10, the host unit issues the temporary identifier in the cell, the identifier of the group of N serving remote units, and the time-frequency resource information of the UE to the corresponding extension unit, where the time-frequency resource information includes an Uplink resource allocation result of the UE, such as time-frequency resource location information of a Physical Uplink Shared Channel (PUSCH) Channel.

And S11, the extension unit directly and transparently transmits the time-frequency resource information to the UE.

And S12, the UE sends the uplink data on the PUSCH resource designated by the time-frequency resource information.

And S13, the expansion unit receives the PUSCH radio frequency signal and then performs radio frequency combination, and the number of the radio frequency combination is configured through the OAM subsystem. And the expansion unit performs PHY-L processing on the radio-frequency combined PUSCH radio-frequency signal to obtain PUSCH Bit-level data. And sending the PUSCH Bit level data to the host unit, and simultaneously carrying the remote unit group identification after radio frequency combination.

Specifically, the extension unit only needs to send the uplink data received at the time-frequency position corresponding to the PUSCH and corresponding to the serving remote unit group according to the UE serving remote unit group issued by the host unit and the PUSCH time-frequency position information specified by the time-frequency resource information to the host unit. In this step, the host unit may position the UE at the overlapping position 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 performs diversity reception on the uplink data received by the two remote unit groups, and uploads the uplink data to the host unit after PHY-L processing. The expansion unit receives the data requirements of the host unit for the N service remote unit groups of the edge UE, respectively performs PHY-L processing on the N service remote unit groups, and independently transmits the data back to the host unit. If the host unit receives multiple paths of data of the same UE, a group of data with correct CRC check is selected and submitted 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., finally obtains the PUSCH bit data and sends the PUSCH bit data to the MAC. And the host unit adopts a diversity combination mode in the channel equalization process for the N paths of symbol data of the same PUSCH time-frequency resource, so that the SNR of uplink reception is improved.

In the above process, the host unit demodulates the uplink SRS signal of the UE to realize real-time positioning of the serving remote unit group to which the UE belongs, and issues the current serving remote unit group identifier of the UE to the corresponding extension unit. After receiving uplink symbol data of corresponding UE, the extension unit only needs to upload the current service remote unit group signal of the UE to the host unit, thereby reducing the requirement of forward transmission on uplink bandwidth. In addition, the PHY-L function is sunk into the extension unit to be realized, the extension unit has independent demodulation and decoding capabilities, and when the host unit judges that the UE is the edge user, the host unit only transmits the data of the remote unit group to be transmitted by combining the load of the current cell, so that the uplink performance of the edge user is greatly improved.

Based on the above embodiment, the embodiment of the present application further provides a base station system, where the host unit includes a UE location management subsystem, an enhanced public wireless interface subsystem, a scheduling subsystem, a user uplink intelligent selection subsystem, and a high-level physical layer subsystem; the UE position management subsystem is used for positioning a service remote end unit group of the UE and processing data transmitted by a physical layer subsystem in the extension unit; the enhanced public wireless interface subsystem is used for analyzing and packaging data through an enhanced public wireless interface specification protocol and transmitting the data through an enhanced public wireless interface specification with the extension unit; the scheduling subsystem is used for managing and scheduling the air interface resources; the system comprises a user uplink intelligent selection subsystem, a remote end unit group selection subsystem and a control subsystem, wherein the user uplink intelligent selection subsystem is used for monitoring the current load of a cell where the UE is located and the signal transmission quality data of a plurality of service remote end unit groups corresponding to the UE, judging whether the UE is an edge user or not, and determining the remote end unit group to be transmitted; and the high-level physical layer subsystem is used for performing high-level physical layer processing on the service data of the UE. Optionally, in an embodiment, the extension unit includes a remote unit group management subsystem, an enhanced public radio interface subsystem, and a lower physical layer subsystem; the remote unit group management subsystem is used for performing remote unit group management on uplink service data and downlink service data for scheduling information of the host unit side; the enhanced public wireless interface subsystem is used for data transmission between the host unit and the expansion unit; and the low-layer physical layer subsystem is used for carrying out low-layer physical layer processing on the uplink and downlink data of the UE.

In this embodiment, please refer to a BBU-RRU function segmentation schematic diagram provided by a 3GPP protocol shown in fig. 8, where a host unit is responsible for implementing all layer functions before option6, an extension unit is responsible for implementing all physical layer functions between options 6 and between options 8, and a remote unit is responsible for receiving and transmitting Radio Frequency (RF) signals after option8, and functionally divides layers, where a UE location management subsystem implements a location function of a UE and an identification function of an edge location UE, and performs location of a remote unit group level to the UE to determine identification of the edge UE based on data processing of a PHY-H (High-PHY, High-level physical layer) subsystem; the uplink intelligent selection subsystem of the user monitors base station load and real-time bandwidth load of a forward link in real time, based on a specified threshold, the uplink remote unit group of the edge position UE is intelligently judged to uniquely select or independently pass back, and PHY-H is controlled to demodulate/decode uplink of a group of DPGs or demodulate and decode multiple groups of uplink DPGs of the edge UE.

As shown in fig. 9, the host unit includes, in addition to a UE location management subsystem, an Enhanced Common Radio Interface subsystem (eCPRI), a scheduling subsystem, a user uplink intelligent selection subsystem and a higher physical Layer subsystem, an Operation and Maintenance management subsystem (OAM), a Media Access Control subsystem (MAC), a Radio Link Control Protocol subsystem (RLC), a Packet Data Convergence Protocol subsystem (PDCP), a Service Data Adaptation Protocol Subsystem (SDAP), a Layer 3 subsystem (Layer 3, L3) and a S1/RLC Interface subsystem, wherein the scheduling subsystem, the Media Access Control subsystem, the Radio Link Control Protocol subsystem (Radio Link Control, RLC), the Convergence Protocol subsystem (RLC), the tcp/RLC) subsystem, the tcp/RLC subsystem, the MAC/RLC subsystem, and the MAC/RLC subsystem are connected in parallel The service data self-adaptive protocol layer subsystem, the layer 3 subsystem and the interface subsystem all belong to a wireless access network protocol stack subsystem. The operation maintenance management subsystem is used for managing all software, configuring and managing, managing faults and managing performance; the media access control layer subsystem and the wireless link control protocol subsystem are used for carrying out related data processing on the wireless access network protocol stack subsystem and the data transmission time interval time sequence; specifically, the packet data convergence protocol layer subsystem is configured to protect data integrity during transmission, encrypt an air interface, and compress an internet protocol address packet header; a service data adaptive protocol layer subsystem for managing the mapping of each networking protocol address stream to a radio bearer; the scheduling subsystem is used for managing and scheduling the air interface resources; layer 3 subsystem, which is used to process wireless resource control protocol signaling and manage wireless resource of long term evolution system; and the interface subsystem is used for processing the control signaling of the core network and processing the tunnel data.

The expansion unit comprises a public wireless interface specification interface subsystem and an operation maintenance management subsystem besides the remote unit group management subsystem, the enhanced public wireless interface subsystem and the low-level physical layer (PHY-L) subsystem. The system comprises a low-layer physical layer (PHY-L) subsystem and a base station, wherein the PHY-L subsystem is used for carrying out low-layer physical layer processing on uplink and downlink data of the UE; the remote unit group management subsystem is used for performing remote unit group management on uplink service data and downlink service data for the scheduling information of the host unit side; the enhanced public wireless interface standard interface subsystem is used for data transmission between the host unit and the extension unit; and a common radio interface specification interface (CPRI) subsystem for the remote unit and the extension unit to transmit data. The PHY-H function comprises channel estimation/equalization, layer mapping, modulation and demodulation, scrambling/descrambling, rate matching and coding/decoding functions, and the PHY-L function comprises IFFT/FFT, CP addition/removal, RE mapping/de-mapping and precoding functions.

The remote unit comprises a CPRI interface subsystem, an RF subsystem and an OAM subsystem, wherein the RF subsystem provides radio frequency signal processing (such as analog-to-digital conversion) and completes signal receiving and sending through an antenna; the CPRI interface subsystem realizes the transmission of IQ data flow based on CPRI with CP.

In addition, as shown in fig. 10, the host Unit may also be divided into a Central Unit (CU) and a Distributed Unit (DU), where the CU is responsible for implementing PDCP, SDAP, and Radio Resource Control (RRC) layer protocol functions, and the DU is responsible for implementing RLC and MAC protocol functions, where the CU and the DU may be deployed in a combined manner or separately.

The embodiment of the application also provides a base station system, wherein if the UE is an edge user, the position of the UE is located among a plurality of remote end unit groups; and if the position of the UE is located in the center of a remote unit group, the UE is a central user.

In this embodiment, the UE and the serving remote unit group are in different location relationships, and the UE is divided into different users, that is, an edge user or a center user, for example, as shown in fig. 11, four scenarios of different UE locations are provided:

(1) UE0 is located at the center of a remote cell group (DPG1), determined not to belong to an edge UE;

(2) the UE1 is located between two remote cell groups (DPG1 and DPG2), which are linked to the same extension Cell (CP) in the DPG1 and DPG2, and belong to an edge UE;

(3) the UE2 is located between two remote unit groups (DPG2 and DPG3), the two remote unit groups (DPG2 and DPG3) are connected with different extension units (CP), and the extension units (CP) are in cascade relation and belong to edge UE;

(4) the UE3 is located between two remote cell groups (DPG3 and DPG4), which are linked to different extension Cells (CPs) in the DPG3 and DPG4, and the extension Cells (CPs) are in non-cascaded relationship and belong to edge UEs.

In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile 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 an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement 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, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the architecture shown in fig. 12 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:

Alternatively, the processor implements the following steps when executing the computer program:

The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

Alternatively, the computer program when executed by the processor implements the steps of:

The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of data transmission, the method comprising:

determining whether a User Equipment (UE) is an edge user or not according to signal transmission quality data of a plurality of serving remote unit groups and the UE; the edge users are users located among a plurality of remote end unit groups;

if the UE is an edge user, determining a current service remote end unit group of the UE according to the current load of the cell where the UE is located and the signal transmission quality data;

transmitting the uplink scheduling information of the UE to a target extension unit; the target expansion unit represents an expansion unit connected with the current serving remote unit group; the uplink scheduling information is used for instructing the target extension unit to process the uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information and upload the processed uplink data to a host unit;

wherein, the determining the current serving remote unit group of the UE according to the current load of the cell in which the UE is located and the signal transmission quality data includes:

acquiring the current load of a cell in which the UE is located; the current load comprises a base station load and a forward link real-time bandwidth load, and the current load is obtained by weighting and summing the base station load and the forward link real-time bandwidth load;

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

and if the load is smaller than the preset load threshold, determining a plurality of service remote unit groups corresponding to the signal transmission quality data larger than the preset signal transmission quality threshold as the current service remote unit group.

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 the multiple remote serving cell groups and the UE comprises:

obtaining a difference value between the signal transmission quality data;

3. The data transmission method according to claim 1 or 2, wherein the signal transmission quality data is determined from sounding reference signal data or from preamble data acquired from a physical random access channel.

4. The data transmission method of claim 1, further comprising:

transmitting downlink scheduling information and downlink data of the UE to the target extension unit; and the downlink scheduling information is used for indicating the target extension unit to process the downlink data according to the downlink scheduling information and transmitting the processed downlink data to the UE through the current serving remote unit group.

5. The data transmission method according to claim 4, wherein the uplink scheduling information is used to instruct the target extension unit to perform low-level physical layer processing on the uplink data of the UE uploaded by the current serving remote unit group according to the uplink scheduling information, and to upload the processed uplink data to a host unit;

and the downlink scheduling information is used for indicating the target extension unit to perform low-level physical layer processing on the downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the UE through the current serving remote unit group.

6. The data transmission method of claim 1, further comprising:

7. A method of data transmission, the method comprising:

processing the uplink data uploaded by the current service remote unit group of the edge user according to the uplink scheduling information, and uploading 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 the plurality of serving remote unit groups of the edge user, wherein the host unit acquires the current load of the cell where the edge user is located; the current load comprises a base station load and a forward link real-time bandwidth load, and the current load is obtained by weighting and summing the base station load and the forward link real-time bandwidth load; if the load is greater than or equal to a preset load threshold, the host unit determines a serving remote unit group corresponding to the maximum signal transmission quality data as the current serving remote unit group; if the load is smaller than the preset load threshold, the host unit determines a plurality of serving remote unit groups corresponding to the signal transmission quality data larger than the preset signal transmission quality threshold as the current serving remote unit group.

8. The data transmission method of claim 7, further comprising:

and processing the downlink data according to the downlink scheduling information, and transmitting the processed downlink data to the edge user through the current serving remote unit group.

9. The data transmission method according to claim 8, wherein the uplink data and the downlink data are both processed by a lower physical layer.

10. The data transmission method according to any one of claims 7 to 9, wherein the signal transmission quality data is determined from preamble data acquired from a physical random access channel or is determined from sounding reference signal data.

11. The data transmission method according to any one of claims 7 to 9, wherein the number of current serving remote unit groups of the edge user is at least two.

12. A base station system, the system comprising: a host unit, an expansion unit and a remote unit; the host unit is connected with at least one expansion unit, and each expansion unit is connected with a plurality of remote unit groups; wherein each of said remote unit sets comprises at least one remote unit;

the host unit is configured to determine whether the UE is an edge user according to a plurality of serving remote unit groups and signal transmission quality data of the UE, determine a current serving remote unit group of the UE according to a current load of a cell in which the UE is located and the signal transmission quality data when the UE is an edge user, and transmit uplink scheduling information of the current serving remote unit group of the UE to a target extension unit; the edge users are users located among a plurality of remote end unit groups; the target expansion unit represents an expansion unit connected with the current serving remote unit group; the uplink scheduling information is used for instructing the target extension unit to process the UE uplink data uploaded by the current serving remote unit group according to the uplink scheduling information and upload the processed uplink data to the host unit; wherein determining the current serving remote unit group of the UE according to the current load of the cell in which the UE is located and the signal transmission quality data includes: acquiring the current load of a cell in which the UE is located; the current load comprises a base station load and a forward link real-time bandwidth load, and the current load is obtained by weighting and summing the base station load and the forward link real-time bandwidth load; if the load is greater than or equal to a preset load threshold, determining a serving remote unit group corresponding to the maximum signal transmission quality data as the current serving remote unit group; if the load is smaller than the preset load threshold, determining a plurality of service remote unit groups corresponding to the signal transmission quality data larger than a preset signal transmission quality threshold as the current service remote unit group;

the extension unit is used for receiving the uplink scheduling information of the current service remote unit group of the edge user, which is sent by the host unit; processing the uplink data of the current service remote unit group according to the uplink scheduling information, and then uploading the processed uplink data to the host unit; the current service 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 service remote unit group of the edge user;

and the remote unit is used for realizing the function of receiving and transmitting radio frequency signals.

13. The base station system according to claim 12, wherein the extension unit is further configured to receive the downlink scheduling information and the downlink data of the edge user transmitted by the host unit, perform lower physical layer processing on the downlink data according to the downlink scheduling information, and transmit the processed downlink data to the edge user through the current serving remote unit group.

14. The base station system of claim 13, wherein the extension unit performs lower physical layer processing on both the uplink data and the downlink data.

15. A base station system according to any of claims 12 to 14, wherein an enhanced common radio interface is used for data transmission between the host unit and the extension unit; and a public wireless interface is adopted between the expansion unit and the remote unit for data transmission.

16. The base station system of any of claims 12-14, wherein the host unit comprises a UE location management subsystem, an enhanced common radio interface subsystem, a scheduling subsystem, a user uplink intelligent selection subsystem, and a higher layer physical layer subsystem;

the UE position management subsystem is used for positioning a service remote end unit group of the UE and processing data transmitted by a physical layer subsystem in the extension unit;

the enhanced public wireless interface subsystem is used for analyzing and packaging data through an enhanced public wireless interface specification protocol and transmitting the data with the extension unit through an enhanced public wireless interface specification;

the scheduling subsystem is used for managing and scheduling air interface resources;

the user uplink intelligent selection subsystem is used for monitoring the current load of the cell where the UE is located and the signal transmission quality data of a plurality of service remote end unit groups corresponding to the UE, judging whether the UE is an edge user or not, and determining a remote end unit group to be transmitted;

and the high-layer physical layer subsystem is used for performing high-layer physical layer processing on the service data of the UE.

17. The base station system according to any of claims 12-14, wherein said extension unit comprises a remote unit group management subsystem, an enhanced public radio interface subsystem, a lower physical layer subsystem;

the remote unit group management subsystem is used for performing remote unit group management of uplink service data and downlink service data on the scheduling information of the host unit side;

and the low-level physical layer subsystem is used for performing low-level physical layer processing on the uplink and downlink data of the UE.

18. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 11 when executing the computer program.

19. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 11.