Data transmission method, system, base station and storage medium

Abstract

The present disclosure discloses a data transmission method, system, base station and storage medium, and relates to the field of wireless communication. The method comprises the following steps: receiving relevant indication information for the degree of early data forwarding acceptance sent by a candidate target base station, and determining a data forwarding mode. The present disclosure can effectively reduce the problem of user data loss caused by inappropriate data forwarding mechanism triggered by a source base station in the conditional handover process, and can also alleviate the occurrence of base station overload to a certain extent.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication, and more particularly to a data transmission method, system, base station, and storage medium. Background Technology

[0002] In recent years, wireless communication technology has experienced rapid development, and people's demands for mobile communication services have also increased. In addition to traditional voice and internet data services, many services with various QoS (Quality of Service) requirements have emerged. For example, remote control, industrial automation, AR (Augmented Reality), and VR (Virtual Reality) require ultra-high reliability and ultra-low latency. For such services, mobility performance should be guaranteed as much as possible to improve user reliability during handover processes.

[0003] In the 3GPP Release 16 standardization work, the 3GPP RAN2 and RAN3 working groups have studied mobility enhancement in NR (New Radio) networks, designing and supporting CHO (Conditional Handover) to improve the robustness of handover processes based on the Xn interface. Under this handover method, after receiving the CHO configuration, the terminal begins to evaluate the execution conditions. When the terminal evaluates and finds that one or more handover execution conditions are met, it directly triggers the handover execution phase and initiates random access to the target base station. This improves the reliability of the handover process.

[0004] Meanwhile, in order to reduce the interruption latency of data transmission, 3GPP defined the Early Data Forwarding (ECO) mechanism, which is applied to the above-mentioned CHO process.

[0005] To distinguish it from Early data forwarding, the 3GPP protocol names the traditional data forwarding mechanism delayed data forwarding. Under delayed data forwarding, the source base station forwards user data to the target base station only after the terminal has successfully connected. The 3GPP protocol specifies that either Early data forwarding or delayed data forwarding can be used for handover, with the choice of which data forwarding mechanism to use during a single handover process determined by the network implementation. In the current protocol, the source base station decides whether to use Early data forwarding; the target base station cannot participate in the decision-making process.

[0006] For conditional handover, if an early data forwarding mechanism is used, the time between data transmission to the candidate target base station and successful connection establishment and data transmission between the terminal and the target base station is unpredictable. Furthermore, during this period, the target / candidate target base station needs to store user data, increasing base station cache pressure and causing unnecessary resource waste. Additionally, when the network load on the candidate target base station is high, cached data may be discarded, resulting in data loss. Summary of the Invention

[0007] One technical problem this disclosure aims to solve is to provide a data transmission method, system, base station, and storage medium that can effectively reduce the problem of user data loss caused by the source base station triggering an inappropriate data forwarding mechanism during the condition handover process.

[0008] According to one aspect of this disclosure, a data transmission method is proposed, comprising: receiving relevant indication information regarding the acceptance level of advance data forwarding sent by a candidate target base station; and determining the data forwarding mode based on the relevant indication information regarding the acceptance level of advance data forwarding from the candidate target base station.

[0009] In some embodiments, receiving indication information regarding the level of acceptance of advance data forwarding sent by the candidate target base station includes: receiving a handover request confirmation signaling sent by the candidate target base station, wherein the conditional handover information in the handover request confirmation signaling includes indication information regarding the level of acceptance of advance data forwarding sent by the candidate target base station.

[0010] In some embodiments, determining the data forwarding method includes: if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is greater than a threshold, then an advance data forwarding mechanism is executed; and if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is less than or equal to the threshold, then a delayed data forwarding mechanism is executed.

[0011] In some embodiments, the candidate target base station determines the relevant indication information regarding the degree of acceptance of advance data forwarding based on the resource usage of the candidate target base station.

[0012] According to another aspect of this disclosure, a data transmission method is also proposed, comprising: determining relevant indication information regarding the degree of acceptance of advance data forwarding; and sending the relevant indication information regarding the degree of acceptance of advance data forwarding to a source base station so that the source base station can determine the data forwarding method.

[0013] In some embodiments, determining relevant indication information regarding the level of acceptance of advance data forwarding includes: determining relevant indication information regarding the level of acceptance of advance data forwarding based on resource usage.

[0014] In some embodiments, sending relevant indication information regarding the level of acceptance of advance data forwarding to the source base station includes: adding relevant indication information regarding the level of acceptance of advance data forwarding to the conditional handover information in the handover request confirmation signaling; and sending handover request confirmation signaling back to the source base station.

[0015] According to another aspect of this disclosure, a base station is also provided, comprising: a degree receiving unit configured to receive relevant indication information regarding the degree of acceptance of advance data forwarding sent by a candidate target base station; and a forwarding determination unit configured to determine a data forwarding method based on the relevant indication information regarding the degree of acceptance of advance data forwarding sent by the candidate target base station.

[0016] According to another aspect of this disclosure, a base station is also proposed, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the data transmission method as described above based on instructions stored in the memory.

[0017] According to another aspect of this disclosure, a base station is also provided, comprising: a degree determination unit configured to determine relevant indication information for the degree of acceptance of advance data forwarding; and a degree transmission unit configured to transmit the relevant indication information for the degree of acceptance of advance data forwarding to a source base station so that the source base station can determine the data forwarding method.

[0018] According to another aspect of this disclosure, a base station is also proposed, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the data transmission method as described above based on instructions stored in the memory.

[0019] According to another aspect of this disclosure, a data transmission system is also proposed, comprising: the aforementioned base station.

[0020] According to another aspect of this disclosure, a non-transitory computer-readable storage medium is also proposed, on which computer program instructions are stored, which, when executed by a processor, implement the data transmission method as described above.

[0021] In this embodiment, the source base station determines whether to trigger the Early data forwarding mechanism based on the relevant indication information on the acceptance level of early data forwarding sent by the candidate target base station. This can effectively reduce the problem of user data loss caused by the source base station triggering an inappropriate data forwarding mechanism during the condition handover process, and can also alleviate the occurrence of base station overload to a certain extent.

[0022] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0024] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0025] Figure 1 This is a flowchart illustrating some embodiments of the data transmission method disclosed herein.

[0026] Figure 2 The following are schematic flowcharts illustrating other embodiments of the data transmission method disclosed herein.

[0027] Figure 3 The following are schematic flowcharts illustrating other embodiments of the data transmission method disclosed herein.

[0028] Figure 4 This is a schematic diagram of the structure of some embodiments of the base station disclosed herein.

[0029] Figure 5 The diagram shows the structure of some other embodiments of the base station disclosed herein.

[0030] Figure 6 The diagram shows the structure of some other embodiments of the base station disclosed herein. Detailed Implementation

[0031] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0032] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0037] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0038] Figure 1 This is a schematic flowchart illustrating some embodiments of the data transmission method disclosed herein. This embodiment is performed by a source base station.

[0039] In step 110, the candidate target base station sends relevant indication information regarding the degree of acceptance of advance data forwarding.

[0040] In some embodiments, the source base station receives a handover request confirmation signaling sent by the candidate target base station, wherein the handover request confirmation signaling includes conditional handover information in the conditional handover information of the candidate target base station regarding the degree of acceptance of advance data forwarding.

[0041] For example, the target candidate base station adds an Early data forwarding Acceptability sub-element to the Conditional Handover Information element in the Handover Request Acknowledge signaling, defining the value range of this element as 0 to 100. When the Early data forwarding Acceptability value is 0, it indicates that the current candidate target base station cannot accept Early data forwarding; when the value is 100, it indicates that the current candidate target base station can fully receive Early data forwarding.

[0042] In some embodiments, the candidate target base station determines the relevant indication information regarding the degree of acceptance of advance data forwarding based on the resource usage of the candidate target base station.

[0043] In step 120, the data forwarding method is determined based on the indication information related to the acceptance level of the candidate target base station for advance data forwarding.

[0044] In some embodiments, if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is greater than a threshold, then the advance data forwarding mechanism is executed; if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is less than or equal to the threshold, then the delayed data forwarding mechanism is executed.

[0045] For example, after receiving the feedback signaling, the source base station refers to the specific value of the Early data forwarding Acceptability sub-element to decide whether to trigger the Early data forwarding procedure. If the Early data forwarding Acceptability sub-element value is greater than the threshold (i.e., a higher value), the Early data forwarding method can be triggered; if the Early data forwarding Acceptability sub-element value is less than or equal to the threshold (i.e., a lower value), the source base station uses the Late data forwarding method.

[0046] In the above embodiments, the source base station determines whether to trigger the Early data forwarding mechanism based on the relevant indication information on the acceptance level of early data forwarding sent by the candidate target base station. This can effectively reduce the problem of user data loss caused by the source base station triggering an inappropriate data forwarding mechanism during the condition handover process.

[0047] Figure 2 This is a flowchart illustrating some other embodiments of the data transmission method of this disclosure. This embodiment is performed by a candidate target base station.

[0048] In step 210, relevant indication information regarding the level of acceptance of advance data forwarding is determined.

[0049] In some embodiments, the candidate target base station determines relevant indication information regarding the level of acceptance of advance data forwarding based on resource usage.

[0050] In step 220, relevant indication information regarding the degree of acceptance of advance data forwarding is sent to the source base station so that the source base station can determine the data forwarding method.

[0051] In some embodiments, the candidate target base station adds relevant indication information regarding the degree of acceptance of advance data forwarding to the conditional handover information in the handover request confirmation signaling, and feeds back the handover request confirmation signaling to the source base station.

[0052] For example, a new information element can be added to the Handover Request Acknowledge signaling sent back by the candidate target base station to the source base station to indicate the candidate target base station's acceptance level of Early data forwarding. This information element can be named "Early data forwarding Acceptability," with a value ranging from 0 to 100. When the Early data forwarding Acceptability value is 0, it indicates that the candidate target base station cannot accept Early data forwarding; when the Early data forwarding Acceptability value is 100, it indicates that the candidate target base station can fully receive Early data forwarding.

[0053] In this embodiment, the candidate target base station sends its acceptance level of Early data forwarding to the source base station so that the source base station can select the data forwarding method. This optimizes the system configuration, avoids user data packet loss caused by inappropriate Early data forwarding, and reduces the pressure on the candidate target base station, thus reducing unnecessary resource waste.

[0054] Figure 3 The following are schematic flowcharts illustrating other embodiments of the data transmission method disclosed herein.

[0055] In step 310, the source base station sends a measurement control message to the terminal.

[0056] In step 320, the terminal sends a measurement report to the source base station.

[0057] In step 330, the source base station decides to use a conditional handover decision for this handover.

[0058] In step 340, the source base station sends a handover request to candidate target base station 1 and candidate target base station 2. The handover request includes CHO information, indicating that the current handover request is a conditional handover request.

[0059] In step 350, candidate target base station 1 and candidate target base station 2 respectively send a handover request response (Handover Request Ack) to the source base station. The handover request response includes Early data forwardingAcceptability.

[0060] The candidate target base station decides whether to accept the current conditional handover request based on its own resource situation. When it accepts the conditional handover request, it sends a Handover request acknowledge signaling to the source base station. The ConditionalHandover Information element in this signaling adds an Early data forwarding Acceptability sub-element.

[0061] In step 360, the source base station sends Radio Resource Control Reconfiguration (RRCReconfiguration) information to the terminal.

[0062] In step 370, the terminal sends a Radio Resource Control Reconfiguration Complete message (RRCReconfigurationComplete) to the source base station, indicating that the handover configuration has been successfully received.

[0063] In step 380, the source base station determines that it can perform the early data forwarding mechanism to the candidate target base station 2 based on the Early data forwardingAcceptability returned by the candidate target base station. Then, it sends an Early Status Transfer signaling to the candidate target base station 2 and forwards the data.

[0064] In step 390, the terminal measures and evaluates the handover execution conditions. If a candidate target base station meets the handover execution conditions, the handover execution process is triggered.

[0065] In step 3100, the terminal sends synchronization and random access signaling to the candidate target base station 1.

[0066] In step 3110, candidate target base station 1 reports a successful handover to the source base station (HO Success).

[0067] In step 3120, the source base station sends a sequence number status transfer signaling (SN Status Transfer) to the candidate target base station 1 and forwards the data.

[0068] In step 3130, the source base station disconnects from the terminal (release connect).

[0069] In this embodiment, referring to 3GPP protocols TS36.423 and TS38.423, a new sub-element, Early dataforwarding Acceptability, is added to the Conditional Handover Information element in the Handover Request Acknowledge signaling. The acceptance level of the candidate target base station for early data forwarding corresponding to the value of this sub-element is defined. The source base station refers to the specific value of the Early data forwarding Acceptability sub-element to determine whether to trigger the Early data forwarding procedure. This can effectively reduce user data loss issues caused by inappropriate network triggering of Early data forwarding under conditional handover methods, and can also alleviate base station overload to some extent.

[0070] Figure 4 This is a schematic diagram of the structure of some embodiments of the base station disclosed herein. The base station, serving as a source base station, includes: a level receiving unit 410 and a forwarding determination unit 420.

[0071] The degree receiving unit 410 is configured to receive relevant indication information regarding the degree of advance data forwarding acceptance sent by the candidate target base station.

[0072] In some embodiments, the degree receiving unit 410 receives a handover request confirmation signaling sent by a candidate target base station, wherein the condition handover information in the handover request confirmation signaling includes relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding.

[0073] For example, the target candidate base station adds an Early data forwarding Acceptability sub-element within the ConditionalHandover Information element in the Handover Request Acknowledge signaling, defining the value range of this element as 0 to 100. When the Early data forwarding Acceptability value is 0, it indicates that the current candidate target base station cannot accept Early data forwarding; when the value is 100, it indicates that the current candidate target base station can fully receive Early data forwarding.

[0074] The forwarding determination unit 420 is configured to determine the data forwarding method based on the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding.

[0075] In some embodiments, if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is greater than a threshold, then the advance data forwarding mechanism is executed; if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is less than or equal to the threshold, then the delayed data forwarding mechanism is executed.

[0076] In the above embodiments, the source base station determines whether to trigger the Early data forwarding mechanism based on the relevant indication information on the acceptance level of early data forwarding sent by the candidate target base station. This can effectively reduce the problem of user data loss caused by the source base station triggering an inappropriate data forwarding mechanism during the condition handover process.

[0077] Figure 5 This is a schematic diagram of the structure of some other embodiments of the base station disclosed herein. The base station, serving as a candidate target base station, includes: a degree determination unit 510 and a degree transmission unit 520.

[0078] The degree determination unit 510 is configured to determine relevant indication information for the degree of acceptance of advance data forwarding.

[0079] In some embodiments, the degree determination unit 510 determines relevant indication information for the degree of acceptance of advance data forwarding based on resource usage.

[0080] The degree transmission unit 520 is configured to send relevant indication information regarding the degree of acceptance of advance data forwarding to the source base station so that the source base station can determine the data forwarding method.

[0081] In some embodiments, the candidate target base station adds relevant indication information regarding the degree of acceptance of advance data forwarding to the conditional handover information in the handover request confirmation signaling, and feeds back the handover request confirmation signaling to the source base station.

[0082] For example, a new information element can be added to the Handover Request Acknowledge signaling sent back by the candidate target base station to the source base station to indicate the candidate target base station's acceptance level of Early data forwarding. This information element can be named "Early data forwarding Acceptability," with a value ranging from 0 to 100. When the Early data forwarding Acceptability value is 0, it indicates that the candidate target base station cannot accept Early data forwarding; when the Early data forwarding Acceptability value is 100, it indicates that the candidate target base station can fully receive Early data forwarding.

[0083] In this embodiment, the candidate target base station sends its acceptance level of Early data forwarding to the source base station so that the source base station can select the data forwarding method. This optimizes the system configuration, avoids user data packet loss caused by inappropriate Early data forwarding, and reduces the pressure on the candidate target base station, thus reducing unnecessary resource waste.

[0084] Figure 6 This is a schematic diagram of the structure of some other embodiments of the base station disclosed herein. This base station can serve as both a source base station and a candidate target base station. The base station 600 includes a memory 610 and a processor 620. The memory 610 can be a disk, flash memory, or any other non-volatile storage medium. The memory 610 is used to store... Figures 1-3 The instructions in the corresponding embodiment. Processor 620 is coupled to memory 610 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. Processor 620 is used to execute instructions stored in memory.

[0085] In some embodiments, the processor 620 is coupled to the memory 610 via a BUS bus 630. The base station 600 can also be connected to an external storage system 650 via a storage interface 640 to access external data, and can also be connected to a network or another computer system (not shown) via a network interface 660. Further details are omitted here.

[0086] In this embodiment, by storing data instructions in a memory and then processing the instructions by a processor, it is possible to avoid situations where the candidate target base station is overloaded or user data is lost due to an unreasonable forwarding mechanism configuration.

[0087] In other embodiments of this disclosure, a data transmission system is protected, the data transmission system comprising, as Figure 3 The source base station shown and as Figure 4 The candidate target base station is shown.

[0088] In other embodiments, a non-transitory computer-readable storage medium stores computer program instructions that are implemented when executed by a processor. Figures 1-3 The steps of the method in the corresponding embodiments are described. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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 a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0090] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0091] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0092] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0093] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A data transmission method, comprising: Receive relevant indication information from candidate target base stations regarding the degree of acceptance of advance data forwarding; as well as Based on the indication information related to the acceptance level of the candidate target base station for advance data forwarding, if the indication information related to the acceptance level of the candidate target base station for advance data forwarding is greater than a threshold, then the advance data forwarding mechanism is executed; if the indication information related to the acceptance level of the candidate target base station for advance data forwarding is less than or equal to the threshold, then the delayed data forwarding mechanism is executed.

2. The data transmission method according to claim 1, wherein, The information received from the candidate target base station regarding the level of acceptance of advance data forwarding includes: The system receives a handover request confirmation signaling sent by the candidate target base station, wherein the handover request confirmation signaling includes conditional handover information of the candidate target base station regarding the degree of acceptance of advance data forwarding.

3. The data transmission method according to claim 1 or 2, wherein, The candidate target base station is determined based on the resource usage of the candidate target base station, taking into account the relevant indication information regarding the degree of acceptance of advance data forwarding.

4. A data transmission method, comprising: Determine relevant instructions regarding the acceptance level of advance data forwarding; as well as The relevant indication information regarding the acceptance level of advance data forwarding is sent to the source base station so that the source base station can determine the data forwarding method. If the relevant indication information regarding the acceptance level of advance data forwarding by the candidate target base station is greater than a threshold, the advance data forwarding mechanism is executed. If the relevant indication information regarding the acceptance level of advance data forwarding by the candidate target base station is less than or equal to the threshold, the delayed data forwarding mechanism is executed.

5. The data transmission method according to claim 4, wherein, The relevant indications for the acceptance of advance data forwarding include: Based on resource usage, determine relevant instructions regarding the acceptance level of advance data forwarding.

6. The data transmission method according to claim 4 or 5, wherein, Sending the relevant indication information regarding the degree of acceptance of advance data forwarding to the source base station includes: Add relevant indications regarding the level of acceptance of advance data forwarding to the conditional handover information in the handover request confirmation signaling; and The handover request confirmation signal is sent back to the source base station.

7. A base station, comprising: The degree receiving unit is configured to receive relevant indication information regarding the degree of advance data forwarding acceptance sent by the candidate target base station; as well as The forwarding determination unit is configured to, based on the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding, execute an advance data forwarding mechanism if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is greater than a threshold, and execute a delayed data forwarding mechanism if the relevant indication information of the candidate target base station regarding the degree of acceptance of advance data forwarding is less than or equal to the threshold.

8. A base station, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the data transfer method as described in any one of claims 1 to 3 based on instructions stored in the memory.

9. A base station, comprising: The degree determination unit is configured to determine relevant indication information for the degree of acceptance of advance data forwarding; as well as The degree transmission unit is configured to send the relevant indication information for the degree of acceptance of advance data forwarding to the source base station so that the source base station can determine the data forwarding method. If the relevant indication information for the degree of acceptance of advance data forwarding of the candidate target base station is greater than a threshold, the advance data forwarding mechanism is executed. If the relevant indication information for the degree of acceptance of advance data forwarding of the candidate target base station is less than or equal to the threshold, the delayed data forwarding mechanism is executed.

10. A base station, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the data transfer method as described in any one of claims 4 to 6 based on instructions stored in the memory.

11. A data transmission system, comprising: The base station as described in claim 7 or 8; as well as The base station as described in claim 9 or 10.

12. A non-transitory computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the data transmission method as described in any one of claims 1 to 6.

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