CN114125934A

CN114125934A - Time delay compensation method and device and electronic equipment

Info

Publication number: CN114125934A
Application number: CN202111326610.7A
Authority: CN
Inventors: 邵奇
Original assignee: New H3C Technologies Co Ltd Chengdu Branch
Current assignee: New H3C Technologies Co Ltd Chengdu Branch
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-01

Abstract

The application provides a time delay compensation method and device and electronic equipment. In the application, a timer is set for a physical cell corresponding to the RRU according to a link delay between the BBU and the RRU, so that a base station can individually schedule and transmit service data to be transmitted for the RRU corresponding to the cell when the timer is overtime. Because the timer is independently set for the cell, the starting time of the timer is determined according to the link delay, so that the time difference between the overtime time of the timer and the starting time of the air interface time slot can be ensured to be the link delay between the RRU and the BBU, the time delay compensation is carried out, the RRU can be immediately sent after receiving data, extra cache is not needed to wait for the arrival of the air interface time, the problem that extra cache capacity needs to be added in the RRU is solved, and the equipment cost is reduced.

Description

Time delay compensation method and device and electronic equipment

Technical Field

The present disclosure relates to the field of network communications, and in particular, to a method and an apparatus for time delay compensation and an electronic device.

Background

In a multi-cell Base station networking, due to the reasons of coverage and address selection of Radio Remote Units (RRUs), etc., it is inevitable that RRUs and baseband processing units (BBUs) are respectively deployed at different positions, and distances between the BBUs and the RRUs are different, so that the BBUs need to be connected with the RRUs through optical fibers with different lengths, and further, link delays of data transmission from the BBUs to the RRUs are different.

In the prior art, in order to ensure that a time point when an RRU sends data is aligned with an air interface time, a BBU generally performs uniform compensation according to a link delay between the BBU and a farthest RRU in a network, sends data to each RRU in advance, caches the data by each RRU, and sends the data when the air interface time arrives.

However, the problem caused by this is that the buffer capacity needs to be additionally increased in each RRU according to the above maximum link delay, and as the number of RRUs hung under the BBU increases and the distance between the farthest RRU in the network and the BBU increases, the buffer amount required by the whole system increases, which leads to an increase in the RRU cost.

Disclosure of Invention

The application provides a time delay compensation method, a time delay compensation device and electronic equipment, which are used for solving the problem that extra cache capacity needs to be added in an RRU (remote radio unit) and reducing equipment cost.

According to a first aspect of embodiments of the present application, there is provided a delay compensation method, including:

when the starting time is reached, starting a target timer, and scheduling service data to be sent at the starting time of an air interface time slot to a target Remote Radio Unit (RRU) when the target timer is overtime, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot;

the starting time is determined according to a target link delay between a target RRU and a baseband processing unit (BBU), the target timer is set for a target cell and is overtime after preset time, and the target cell is a physical cell corresponding to the target RRU.

In a possible implementation manner, the determining the start time according to the target link delay between the target RRU and the baseband processing unit BBU includes:

acquiring the target link time delay between the target RRU and the BBU;

and determining a target time slot from an air interface, and using the starting time of the target time slot to forward the time length corresponding to the target link time delay as the starting time of the target timer.

In a possible implementation manner, the determining the target timeslot from the air interface includes:

determining a current time slot corresponding to the current absolute time in the air interface;

and at least one time slot is carried forward by the current time slot to be used as the target time slot.

In a possible implementation manner, the preset time is a duration of a timeslot of an air interface in the air interface, or a duration of a symbol of the air interface.

In a possible implementation manner, if there are other different RRUs in the base station besides the target RRU and corresponding to the target cell, where a difference between link delays between all RRUs corresponding to the target cell and the BBU is within a preset error range, the starting time is determined according to a target link delay between the target RRU and the BBU, including:

and acquiring the link delay between any RRU corresponding to the target cell and the BBU as the target link delay.

Further, in a possible implementation manner, the scheduling, to the target RRU, service data that needs to be sent at the starting time of the air interface time slot, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot further includes:

scheduling service data to be sent at the starting time of the air interface time slot to all the RRUs corresponding to the target cell so that all the RRUs corresponding to the target cell send the service data to the air interface at the starting time of the air interface time slot; and all the RRUs corresponding to the target cell send the same service data to the air interface.

According to a second aspect of the embodiments of the present application, there is provided a delay compensation apparatus, including:

a delay compensation unit, configured to start a target timer when a start time is reached, and schedule, to a target RRU, service data that needs to be sent at an air interface time slot start time when the target timer times out, so that the target RRU sends the service data to an air interface at the air interface time slot start time;

the starting time is determined according to a target link delay between a target RRU and a BBU, the target timer is set for a target cell and is overtime after preset time, and the target cell is a physical cell corresponding to the target RRU.

In a possible implementation manner, in the delay compensation unit, the determining the start time according to a target link delay between a target RRU and a BBU includes:

acquiring the target link time delay between the target RRU and the BBU;

In a possible implementation manner, the determining, by the delay compensation unit, a target timeslot from an air interface includes:

In a possible implementation manner, if there are other different RRUs in the base station besides the target RRU and corresponding to the target cell, where a difference between link delays between all RRUs corresponding to the target cell and the BBU is within a preset error range, in the delay compensation unit, the starting time is determined according to a target link delay between the target RRU and the BBU, and the method includes:

Further, in a possible implementation manner, in the delay compensation unit, the scheduling, to the target RRU, service data that needs to be sent at the starting time of the air interface time slot, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot further includes:

According to a third aspect of embodiments of the present application, there is provided an electronic apparatus including: a processor and a machine-readable storage medium;

the machine-readable storage medium stores machine-executable instructions executable by the processor;

the processor is configured to execute the machine-executable instructions to perform the steps of any of the methods disclosed above.

As can be seen from the above technical solutions, in this embodiment, a timer is set for a physical cell corresponding to an RRU according to a link delay between a BBU and the RRU, so that a base station can individually schedule and transmit service data to be transmitted for the RRU corresponding to the cell when the timer is overtime. Because the timer is independently set for the cell, the starting time of the timer is determined according to the link delay, so that the time difference between the overtime time of the timer and the starting time of the air interface time slot can be ensured to be the link delay between the RRU and the BBU, the time delay compensation is carried out, the RRU can be immediately sent after receiving data, extra cache is not needed to wait for the arrival of the air interface time, the problem that extra cache capacity needs to be added in the RRU is solved, and the equipment cost is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a flowchart of a delay compensation method according to an embodiment of the present application;

fig. 2 is a schematic diagram of a networking structure provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a timeline provided by an embodiment of the present application;

fig. 4 is a structural diagram of a delay compensation apparatus according to an embodiment of the present application;

fig. 5 is a structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

In order to make the technical solutions provided in the embodiments of the present application better understood and make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a flowchart of a method provided in the embodiment of the present application, and as an embodiment, the flowchart may be applied to a base station, and optionally, the base station may be a 4G base station or a 5G base station, and is applicable to any multi-cell networking scenario, such as independent multi-cells, cell merging, Coordinated multi-point transmission (CoMP) cells, and the like, which is not limited in this embodiment.

As shown in fig. 1, the process may include the following steps:

step 101, when the starting time is reached, starting a target timer, and when the target timer times out, scheduling service data to be sent at the starting time of an air interface time slot to a target Remote Radio Unit (RRU) so that the target RRU sends the service data to an air interface at the starting time of the air interface time slot;

the starting time is determined according to a target link delay between a target RRU and a baseband processing unit (BBU), the target timer is set for a target cell and is overtime after preset time, and the target cell is a physical cell corresponding to the target RRU. In this embodiment, the base station may correspond to one or more logical cells, each logical cell may correspond to one or more physical cells, and each physical cell may correspond to one or more RRUs, which is not limited in this embodiment. For convenience of understanding and explanation, a case where each physical cell corresponds to one RRU is described as an example, where one RRU in the base station is determined as a target RRU, and a physical cell corresponding to the target RRU is determined as a target cell; based on the same principle, the method flow may be applied to a case where one physical cell corresponds to multiple RRUs, which will be described later by embodiments, and will not be described again here.

In addition, in some types of base stations, the RRU component may adopt other names or be a part of other components, for example, in a part of 5G base stations, a BBU-AAU (Active Antenna Unit) structure is adopted, where the AAU includes substantially all functions that the RRU needs to have in this embodiment although the name is different from that of the BBU, so the technical solution disclosed in this embodiment may also be applied, and this embodiment does not limit this.

In this embodiment, clock synchronization and frequency synchronization are completed between the default base station and the air interface, and between the BBU inside the base station and each RRU. For example, a Global Navigation Satellite System (GNSS) can be used as a reference source, and synchronization can be performed between the BBU and a Satellite in a Global Positioning System (GPS) or a beidou System; synchronization between the BBU and each RRU may be completed using a 1588 clock synchronization protocol, and the like, which is not limited in this embodiment, and a specific synchronization manner may be implemented by referring to a conventional technical means in the art, and is not described herein again.

In this embodiment, there are various ways for the base station to obtain the target link delay between the BBU and the target RRU, for example, the target link delay may be obtained by calculating a timestamp in a protocol message during the synchronization process between the BBU and the target RRU by a 1588 clock synchronization protocol; after clock synchronization is completed, the BBU sends a message containing a timestamp to the target RRU, and after the target RRU receives the message, the target RRU calculates and obtains target link delay according to the timestamp and reports the delay value to the BBU through an IR interface; or after clock synchronization is completed, directly sending a message including a timestamp to the BBU by the target RRU, and calculating to obtain the target link delay after the BBU receives the message. The target link delay herein mainly refers to the actual delay time required for data to reach the target RRU through optical fiber transmission from the BBU, rather than a theoretical value obtained by calculation according to a linear distance or an optical fiber length.

It should be noted that, besides the time of data transmission in the optical fiber, in an actual scenario, the time required for BBU scheduling data, the time required for the RRU to send the received data to the air interface, and the like may also be included, and since these times can be obtained and compensated correspondingly in the current base station data scheduling process, in this embodiment of the present application, compensation is mainly performed for the delay caused by the data transmission in the optical fiber, and the time required for the data transmission in the above-mentioned other than the optical fiber may be considered to have been compensated in other manners, may also be considered to be included in the target link delay, and the like, which is not limited in this embodiment.

Optionally, the base station may obtain the link delay between the BBU and each of the RRUs that are hung down after starting or receiving an external command, may automatically obtain and store a corresponding link delay when a new RRU is accessed, may obtain a link delay of a corresponding RRU when a new cell is established, and the like, which is not limited in this embodiment.

In this embodiment, the target timer is set for a target cell, and the target cell is a physical cell corresponding to the target RRU. The starting time of the target timer is the time for starting the target timer; after the target timer is started, the target timer will be overtime after a preset time, trigger subsequent operations related to the target cell in the base station, and wait for next time of overtime and reset according to the preset time again.

The method may be configured to ensure that a time difference between the timeout time of the target timer and the start time of the air interface timeslot is the target link delay by determining the start time of the target timer.

Optionally, as an embodiment, the start time of the target timer may be determined as the start time of the target timer by determining a target time slot from an air interface and advancing the start time of the target time slot by the time length of the target link delay, so that the start time of the target timer is aligned with the start time of a certain time slot in the air interface after the start time of the target timer passes through the time corresponding to the target link delay.

Further, the preset time may be set as a duration of a timeslot of an air interface in the air interface, so as to ensure that a time difference between a time when the target timer times out each time and a starting time of a certain timeslot in the air interface is the same as a time delay of the target link, thereby implementing delay compensation; however, the preset time may also be set to other lengths according to actual requirements, for example, for a base station having functions of high reliability and Low Latency Communications (URLLC), data scheduling and sending may be performed with symbol-level accuracy, so that the preset time may be set to a duration of one symbol in an air interface, which is not limited in this embodiment.

It should be noted that, for all physical cells in the same base station, the technical solution disclosed in the embodiment of the present application may be applied to perform delay compensation, that is, any physical cell may be used as each target cell, and the method is executed in parallel; however, the starting time of the target timer for each target cell is set independently, and it is necessary to ensure that the preset time of all target timers in the same base station is equal.

Optionally, as an embodiment, the target timeslot may be determined by: determining a current time slot corresponding to the current absolute time in the air interface; and at least one time slot is carried forward by the current time slot to be used as the target time slot.

There are various ways to determine the current absolute time and the current time slot, which is not limited in this embodiment. For example, the current absolute time may be obtained from the GNSS or other clock sources, and after obtaining the current absolute time, the base station may determine, according to a time prerecorded in the protocol and a time slot number corresponding to the time, for example, a time slot 0 of a 0 th subframe of a 0 th frame, which is a time in which 1980-01-1600: 00:19 is prerecorded in the protocol 38.401, and by combining a time length of a single time slot in the air interface, a time slot number of a time slot corresponding to the current absolute time in the air interface is determined, and the time slot is used as the current time slot.

After the current time slot is determined, one or more time slot numbers may be carried forward from the current time slot, and the time slot corresponding to the time slot number obtained after the forward carrying is used as a target time slot, so as to determine the target time slot.

The purpose of the foregoing delaying one or more slot numbers is to prevent the situation that the time length of the target link delay is advanced by the starting time of the target slot before the current absolute time, that is, the situation that the target timer needs to be started at a certain past time. Therefore, the starting time of the target timeslot is selected to be later than the time point when the target link delay elapses from the current absolute time. For example, note the current absolute time as T_nowRecording the starting time of the target time slot as T₀Recording the target link delay as T_{1_delay}Then, the starting time of the selected target timeslot should satisfy the condition in the following formula 1:

T₀>T_now+T_{1_delay}(formula 1)

In this embodiment, any time slot of the air interfaces that meets the condition in formula 1 may be selected as the target time slot, and there is no other limitation on the selection of the target time slot in this embodiment.

Alternatively, as an embodiment, after the target timeslot is determined, the following equation 2 may be used to determine the starting time T of the target timer_xtimer1：

T_xtimer1＝T₀-T_{1_delay}(formula 2)

The starting time of the target timer is ensured to be later than the current absolute time by combining the formula 1 and the formula 2, and the contradiction that the target timer needs to be started at a certain past moment is avoided.

In this embodiment, the target timer starts timing from the time when the start time is reached, and instructs the base station to schedule service data to be sent by the target RRU when the time is out each time; optionally, the target timer may also instruct the base station to schedule service data to be sent by the target RRU when being started.

Optionally, the service data to be sent by the target RRU may be service data that is determined by the base station in advance to be sent by the target RRU from all service data to be sent by a logical cell corresponding to the target cell, and the target RRU is scheduled and instructed to send the received data to an air interface after the target timer expires; or after the base station receives service data to be sent through a logical cell corresponding to the target cell, the base station may wait until a target timer set for a certain target cell in one or more target cells corresponding to the logical cell times out, and then schedule the service data by the base station, determine data to be sent through a target RRU corresponding to the target cell, and instruct the target RRU to send the received data to an air interface, and so on, which is not limited in this embodiment.

In this embodiment, the specific data scheduling and transmission method in step 101 may be executed according to a protocol specification, for example: the target timer may send a scheduling request including a frame number, a subframe number, and a time slot number to a data processing module in the base station when the target timer times out, and inform the data processing module to start processing service data corresponding to the target cell at the current time, so as to ensure that the service data can be sent to an air interface through the RRU when the time slot number arrives; specifically, after receiving the scheduling request, the data processing module starts a data processing procedure, including data processing of a downlink control channel and a data channel, such as scheduling processing of an MAC layer, packet packing, encoding, modulation, layer mapping precoding, resource mapping, and the like of a physical layer, to convert the service data into In-phase/Quadrature (I/Q) data, and transmits the I/Q data to the target RRU through an optical fiber from an optical port; and after receiving the I/Q data, the target RRU immediately performs medium radio frequency processing on the data and sends the data to an air interface through an antenna. The above data scheduling, processing and sending modes are exemplary descriptions, and may be adjusted according to protocol regulations or actual situations in a specific application scenario, which is not limited in this embodiment.

Preferably, the foregoing describes a case where one physical cell corresponds to one RRU, and based on the same principle, the above technical solution may also be applied to a case where one physical cell corresponds to multiple RRUs.

And taking the physical cell corresponding to the plurality of RRUs as a target cell, and acquiring the link delay between any one of the plurality of RRUs and the BBU as the target link delay, wherein the link delays between the plurality of RRUs and the BBU are required to be approximately equal, namely, the difference is within a preset error range, so that the delay compensation can be carried out on the plurality of RRUs corresponding to the physical cell by using the same target timer set for the physical cell.

Similarly, when the target timer times out, service data to be sent at the starting time of the air interface time slot is scheduled to all the RRUs corresponding to the target cell, so that all the RRUs corresponding to the target cell send the service data to the air interface at the starting time of the air interface time slot. In a radio frequency combination scene that one physical cell corresponds to a plurality of RRUs, the data sent by the plurality of RRUs are the same; the scenario in which the physical cell and the RRUs correspond to each other one to one does not have the limitation, and data that can be sent by each RRU may be different.

Thus, the flow shown in fig. 1 is completed.

As can be seen from the flow shown in fig. 1, in this embodiment, a timer is set for a physical cell corresponding to an RRU according to a link delay between a BBU and the RRU, so that a base station can individually schedule and transmit service data to be transmitted for the RRU corresponding to the cell when the timer is overtime. Because the timer is independently set for the cell, the starting time of the timer is determined according to the link delay, so that the time difference between the overtime time of the timer and the starting time of the air interface time slot can be ensured to be the link delay between the RRU and the BBU, the time delay compensation is carried out, the RRU can be immediately sent after receiving data, extra cache is not needed to wait for the arrival of the air interface time, the problem that extra cache capacity needs to be added in the RRU is solved, and the equipment cost is reduced.

In order to make those skilled in the art better understand the technical solution provided by this embodiment, the following describes the technical solution in fig. 1 in further detail with reference to a specific networking structure diagram, a time axis diagram and an embodiment.

Referring to fig. 2, fig. 2 is a schematic diagram of a networking structure in this embodiment, and the diagram includes a base station 200, a BBU210, an RRU221, an RRU231, an RRU232, an RUU233, a physical cell 220, and a physical cell 230. The RRUs 221, the RRUs 231, the RRUs 232, and the RUUs 233 are a plurality of RRUs hung under the BBU210, and are respectively connected to the BBU210 through optical fibers, and differences in link delays between the RRUs 231, the RRUs 232, the RUUs 233, and the BBU210 are within a preset error range, the RRU221 corresponds to the physical cell 220, the RRUs 231, the RRUs 232, and the RUUs 233 correspond to the physical cell 230, and the physical cell 220 and the physical cell 230 may correspond to the same logical cell or may correspond to different logical cells.

Referring to fig. 3, fig. 3 is a schematic time-axis diagram of the present embodiment, which includes an air interface 300, a target timer 320, and a target timer 330, where the target timer 320 corresponds to the physical cell 220, and the target timer 330 corresponds to the physical cell 230.

As an optional embodiment, in a case that one RRU corresponds to one physical cell, the step 101 may be implemented by referring to the following manner:

the BBU210 selects the RRU221 as the target RRU, performs clock synchronization and frequency synchronization with a satellite through GNSS, performs clock synchronization with the RRU221 through 1588 clock synchronization protocol, and utilizes the RRU221 in the clock synchronization processCalculating and obtaining the target link time delay T between the BBU210 and the RRU221 according to the time stamp information in the clock synchronization message_{1_delay}；

The BBU210 selects a target timeslot Slot 0 from the air interface 300, and the specific selection manner refers to the related embodiment in step 101, which is not described herein again; starting time T of target time Slot Slot 0₀Is an absolute time, and is advanced by the time to the target link delay T_{1_delay}The same duration is used as the starting time T of the target timer 320_xtimer1The target timer times out and resets after each time duration of one air interface time slot in the air interface 300;

at the above starting time T_xtimer1When the service data arrives, the target timer 320 is started, timeout is achieved once after the duration of one air interface time slot, the target timer is reset, information including a frame number, a subframe number and a time slot number is provided for a data scheduling module in the BBU210 during each reset, the data scheduling module is instructed to schedule the service data to be sent through the RRU221, and optionally, the starting time T of the target timer 320 is set_xtimer1When the time is up, the time can be regarded as overtime, and the information is provided for the data scheduling module and the scheduling is indicated;

after receiving the information from the target timer 320, the BBU210 starts a data processing procedure, that is, data processing of a downlink Control channel and a data channel, including scheduling processing of a Media Access Control (MAC) layer, grouping, coding, modulation, layer mapping precoding, resource mapping, and the like of a physical layer, converts the service data into an I/Q format, and transmits the I/Q format to the RRU221 through an optical fiber;

since the time difference between the timeout time of the target timer 320 and the start time of the timeslot in the air interface 300 is fixed to the target link delay T_{1_delay}Therefore, the I/Q data passes through the time delay T of the target link in the optical fiber_{1_delay}The data are transmitted to the RRU after the same duration, the RRU immediately performs medium radio frequency processing after receiving the I/Q data and sends the data to the air interface 300 through the antenna, so that the data sending time can be aligned with the starting time of the time slot in the air interface 300 without extra cache or waiting.

As an optional embodiment, in the case that a plurality of RRUs correspond to one physical cell, the foregoing method may be implemented by using similar steps:

acquiring link delay of any one of the RRUs including the RRU231, the RRU232 and the RUU233 and the BBU210 as target link delay T_{2_delay}Taking the RRU as a target RRU; another target timer 330 is set for the physical cell 230, the target timer 330 is the same as the timeout time of the target timer 320, and the starting time T_xtimer2According to target link delay T_{2_delay}Independently setting to carry out time delay compensation on different link time delays; optionally, the start time T of the target timer 330 is set_xtimer2In the meantime, Slot 0 may still be used as the target timeslot, or another timeslot meeting the condition may be reselected as the target timeslot, which is not limited in this embodiment; after the target timer 330 is overtime, the BBU210 schedules service data to be sent by the RRU231, the RRU232, and the RUU233, and sends the service data received by the RRU231, the RRU232, and the RUU233 to the air interface 300, where the service data received and sent by the RRU231, the RRU232, and the RUU233 have the same content. Other steps can be executed by referring to the situation that one RRU corresponds to one physical cell, which is not described herein again.

Thus, the schematic diagrams shown in fig. 2 and 3 are completed.

The method provided by the embodiment is described above, and the device provided by the embodiment is described below:

referring to fig. 4, fig. 4 is a structural diagram of a delay compensation apparatus according to an embodiment of the present application. The apparatus corresponds to the flow shown in fig. 1. As shown in fig. 4, the apparatus may include:

a delay compensation unit 401, configured to start a target timer when a start time is reached, and schedule, to a target RRU, service data that needs to be sent at an air interface time slot start time when the target timer times out, so that the target RRU sends the service data to an air interface at the air interface time slot start time;

In a possible implementation manner, in the delay compensation unit 401, the determining, by the start time according to the target link delay between the target RRU and the BBU, includes:

acquiring the target link time delay between the target RRU and the BBU;

In a possible implementation manner, in the delay compensation unit 401, determining the target timeslot from the air interface includes:

In a possible implementation manner, if there are other different RRUs in the base station besides the target RRU corresponding to the target cell, where a difference between link delays between all RRUs corresponding to the target cell and the BBU is within a preset error range, in the delay compensation unit 401, the determining the start time according to the target link delay between the target RRU and the BBU includes:

Further, in a possible implementation manner, in the delay compensation unit 401, the scheduling, to the target RRU, service data that needs to be sent at the starting time of the air interface time slot, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot further includes:

Thus, the description of the structure of the device shown in fig. 4 is completed.

The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.

The embodiment of the application also provides a hardware structure. Referring to fig. 5, fig. 5 is a structural diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 5, the hardware structure may include: a processor and a machine-readable storage medium having stored thereon machine-executable instructions executable by the processor; the processor is configured to execute machine-executable instructions to implement the methods disclosed in the above examples of the present application.

Based on the same application concept as the method, embodiments of the present application further provide a machine-readable storage medium, where several computer instructions are stored, and when the computer instructions are executed by a processor, the method disclosed in the above example of the present application can be implemented.

The machine-readable storage medium may be, for example, any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and the like. For example, the machine-readable storage medium may be: a RAM (random Access Memory), a volatile Memory, a non-volatile Memory, a flash Memory, a storage drive (e.g., a hard drive), a solid state drive, any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof.

The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. A typical implementation device is a computer, which may take the form of a personal computer, laptop computer, cellular telephone, camera phone, smart phone, personal digital assistant, media player, navigation device, email messaging device, game console, tablet computer, wearable device, or a combination of any of these devices.

For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Furthermore, these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A time delay compensation method is applied to a base station, and comprises the following steps:

2. The method of claim 1, wherein the starting time is determined according to a target link delay between the target RRU and the BBU, and comprises:

acquiring the target link delay between the target RRU and the BBU;

and determining a target time slot from an air interface, and using the starting time of the target time slot to forward a time length corresponding to the target link time delay as the starting time of the target timer.

3. The method of claim 2, wherein the determining the target timeslot from the air interface comprises:

determining a current time slot corresponding to current absolute time in the air interface;

4. The method of claim 1, wherein the preset time is a duration of a timeslot of an air interface in the air interface, or a duration of a symbol of the air interface.

5. The method according to any of claims 1-4, wherein if there are other different RRUs in the base station besides the target RRU corresponding to the target cell, wherein the difference of the link delay between all RRUs corresponding to the target cell and the BBU is within a preset error range, the starting time is determined according to the target link delay between the target RRU and the BBU, including:

acquiring link delay between any RRU corresponding to the target cell and the BBU as target link delay;

the scheduling, to the target RRU, the service data that needs to be sent at the starting time of the air interface time slot, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot, further includes:

scheduling service data to be sent at the starting time of the air interface time slot to all the RRUs corresponding to the target cell so that all the RRUs corresponding to the target cell send the service data to the air interface at the starting time of the air interface time slot; and all the RRUs corresponding to the target cell send the same service data to an air interface.

6. A delay compensation apparatus, applied to a base station, comprising:

the time delay compensation unit is used for starting a target timer when the starting time is up, and scheduling service data needing to be sent at the starting time of an air interface time slot to a target RRU when the target timer is over time so that the target RRU sends the service data to an air interface at the starting time of the air interface time slot;

the starting time is determined according to a target link delay between a target RRU and a BBU, the target timer is set for a target cell, and the target cell is overtime after preset time, and the target cell is a physical cell corresponding to the target RRU.

7. The apparatus of claim 6, wherein in the delay compensation unit, the determining the start time according to the target link delay between the target RRU and the BBU comprises:

acquiring the target link delay between the target RRU and the BBU;

8. The apparatus of claim 7, wherein the determining, in the delay compensation unit, the target timeslot from the air interface comprises:

9. The apparatus according to any of claims 6-8, wherein if there are other different RRUs in the base station besides the target RRU corresponding to the target cell, and a difference between link delays between all RRUs corresponding to the target cell and the BBU is within a preset error range, the start time in the delay compensation unit is determined according to a target link delay between the target RRU and the BBU, including:

in the delay compensation unit, the scheduling, to the target RRU, the service data that needs to be sent at the starting time of the air interface time slot, so that the target RRU sends the service data to the air interface at the starting time of the air interface time slot further includes:

10. An electronic device, comprising: a processor and a machine-readable storage medium;

the processor is configured to execute the machine-executable instructions to perform the method steps of any of claims 1-5.