Data transmission method and apparatus, device, and storage medium

Abstract

The present disclosure relates to a communication technology field, and provides a data transmission method, an apparatus, a device, and a storage medium. The method includes receiving a first preset signaling sent by a terminal, the first preset signaling including a conditional primary secondary cell addition / change (CPAC) execution indication information, the CPAC execution indication information being used to indicate that the terminal has executed a CPAC process, and sending a second preset signaling to a source secondary node when the CPAC process is a conditional primary secondary cell change (CPC) process, the second preset signaling including a CPC execution indication information, the CPC execution indication information being used to indicate that the terminal has executed a CPC process. According to the method, problems of data interruption or network cache overload that may be caused by an inappropriate data forwarding trigger time during CPAC are avoided.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATION]. This application is based on and claims priority from Chinese Patent Application No. 202110882804.9, filed on August 2, 2021, the entire disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to the technical field of communications, and in particular to a data transmission method and apparatus, a device, and a readable storage medium. [Background technology]

[0003] In the actual deployment scenario of fifth-generation mobile communication technology (5G for short), the application of NSA (Non-Standalone, which refers to a networking architecture in which 4G and 5G base stations coexist on the radio side and the core network adopts a 4G core network) architecture means that 4G and 5G networks will coexist for the foreseeable future. The application of various Multi-RAT (Radio Access Technology)-Dual Connectivity (MR-DC) technologies will effectively improve network coverage and system capacity, ensure user service quality, and improve network spectrum utilization.

[0004] A key research topic in MR-DC enhancement technology is supporting the Conditional Primary Secondary Cell Addition / Change (CPAC) process. The CPAC process supports a late data forwarding mechanism, whereby data transfer is performed after a terminal (also referred to as User Equipment (UE)) connects with a target secondary node (SN). However, in the CPAC process, triggering the UE's connection with the target SN is initiated by the UE. As a result, the time for initiating data transfer by the master node (MN) or source SN that triggers the CPAC process may not be properly synchronized with the time for initiating the UE's connection with the target SN. Inappropriate timing for triggering data transfer may result in UE data interruption or network cache overload. The term "late data forwarding" is used herein to distinguish it from early data forwarding, which may in practice also be named in time data forwarding, on time data forwarding, etc., all of which refer to mechanisms by which the source node performs data forwarding after the UE has successfully selected a target secondary node.

[0005] As mentioned above, how to trigger the data transfer process at the right time has become an urgent problem to be solved.

[0006] The above information disclosed in the Background section is intended solely to enhance understanding of the background of the present disclosure, ie, may include information that does not form part of prior art known to those skilled in the art. Summary of the Invention [Means for solving the problem]

[0007] Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0008] According to one aspect of the present disclosure, there is provided a data transmission method applied to a master node, the method including: receiving first preset signaling transmitted from a terminal, the first preset signaling including conditional primary secondary cell addition / change (CPAC) execution instruction information indicating that the terminal has performed a conditional primary secondary cell addition / change (CPAC) process; and, if the CPAC process is a conditional primary secondary cell change (CPC) process, transmitting second preset signaling to a source secondary node, the second preset signaling including CPC execution instruction information indicating that the terminal has performed the CPC process.

[0009] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0010] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0011] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, which is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0012] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, which is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0013] According to some embodiments of the present disclosure, the first preset signaling further includes information related to CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the method further includes a step of obtaining a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell, and the second preset signaling includes information related to the CPC execution instruction information, and the information related to the CPC execution instruction information in the second preset signaling includes the identification information of the target cell and the data forwarding address corresponding to the target cell.

[0014] According to some embodiments of the present disclosure, the method further includes, in a late data forwarding process, receiving data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted from a source secondary node that triggered the late data forwarding process based on the CPC execution instruction information, and the data forwarding address corresponding to the target cell, which is transmitted from the source secondary node based on information related to the CPC execution instruction information; and transmitting the data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0015] According to some embodiments of the present disclosure, when the CPAC process is a conditional primary secondary cell addition (CPA) process, the first preset signaling further includes information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPA process, and the method further includes: obtaining a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell; triggering a late data forwarding process based on the CPAC execution instruction information in response to receiving the first preset signaling; and in the late data forwarding process, transmitting to the target secondary node data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted according to the data forwarding address corresponding to the target cell.

[0016] According to some embodiments of the present disclosure, the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0017] According to a further aspect of the present disclosure, there is provided a data transmission method applicable to a terminal, the method including: transmitting, to a master node, first preset signaling including CPAC execution instruction information indicating that the terminal has performed a conditional primary secondary cell addition / change (CPAC) process; if the CPAC process is a conditional primary secondary cell change (CPC) process, the first preset signaling transmits, to a source secondary node, second preset signaling including CPC execution instruction information, the CPC execution instruction information being used to indicate that the terminal has performed the CPC process.

[0018] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0019] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0020] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0021] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0022] According to some embodiments of the present disclosure, the first preset signaling further includes information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the method further includes, by transmitting the first preset signaling to the master node, the master node obtaining a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell, and the second preset signaling includes information related to the CPC execution instruction information, and the information related to the CPC execution instruction information in the second preset signaling includes the identification information of the target cell and the data forwarding address corresponding to the target cell.

[0023] According to some embodiments of the present disclosure, the first preset signaling is multi-radio access technology dual connectivity signaling for uplink information transfer.

[0024] According to a further aspect of the present disclosure, there is provided a data transmission method applied to a secondary node, the method including receiving second preset signaling transmitted from a master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information, the second preset signaling including CPC execution instruction information used to indicate that a terminal has performed a CPC process, the second preset signaling being generated by the master node according to the CPAC execution instruction information in first preset signaling transmitted by the terminal when a conditional primary secondary cell addition / change (CPAC) process performed by the terminal is the CPC process, the first preset signaling including the CPAC execution instruction information, and the CPAC execution instruction information being used to indicate that the terminal has performed the CPAC process.

[0025] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0026] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0027] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0028] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0029] According to some embodiments of the present disclosure, the first preset signaling further includes information related to the CPAC execution instruction information, wherein the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the second preset signaling includes information related to the CPC execution instruction information, wherein the information related to the CPC execution instruction information in the second preset signaling includes identification information of the target cell and a data forwarding address corresponding to the target cell, and the data forwarding address corresponding to the target cell is obtained by the master node from the obtained data forwarding address according to the identification information of the target cell.

[0030] According to some embodiments of the present disclosure, the method further includes: triggering a late data forwarding process based on the CPC execution instruction information; in the late data forwarding process, sending to the master node data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted; and sending to the master node a data forwarding address corresponding to the target cell based on information related to the CPC execution instruction information, so that the master node sends to the target secondary node the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted according to the data forwarding address corresponding to the target cell.

[0031] According to some embodiments of the present disclosure, the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0032] According to another aspect of the present disclosure, there is provided a data transmission device applied to a master node, the data transmission device comprising: a first preset signaling receiving module configured to receive first preset signaling transmitted from a terminal, the first preset signaling including conditional primary secondary cell addition / change (CPAC) execution instruction information, the CPAC execution instruction information being used to indicate that the terminal has executed a CPAC process; and a second preset signaling transmitting module configured to transmit second preset signaling to a source secondary node if the CPAC process is a conditional primary secondary cell change (CPC) process, the second preset signaling including CPC execution instruction information being used to indicate that the terminal has executed the CPC process.

[0033] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0034] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0035] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0036] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0037] According to some embodiments of the present disclosure, the first preset signaling further includes information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, and the device further includes a data forwarding address acquisition module configured to acquire a data forwarding address corresponding to the target cell from the acquired data forwarding address according to the identification information of the target cell, and the second preset signaling includes information related to the CPC execution instruction information, and the information related to the CPC execution instruction information in the second preset signaling includes the identification information of the target cell and the data forwarding address corresponding to the target cell.

[0038] According to some embodiments of the present disclosure, the device further includes a data forwarding module configured to receive, in a late data forwarding process, data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, transmitted from the source secondary node that triggers the late data forwarding process based on the CPC execution instruction information, and a data forwarding address corresponding to the target cell transmitted from the source secondary node based on information related to the CPC execution instruction information, and to transmit the data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0039] According to some embodiments of the present disclosure, when the CPAC process is a conditional primary secondary cell addition (CPA) process, the first preset signaling further includes information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPA process, and the device further includes a data forwarding address acquisition module configured to acquire a data forwarding address corresponding to the target cell from the acquired data forwarding address according to the identification information of the target cell, and the device further includes a data transmission module configured to trigger a late data forwarding process based on the CPAC execution instruction information in response to receiving the first preset signaling, and in the late data forwarding process, transmit data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0040] According to some embodiments of the present disclosure, the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0041] According to another aspect of the present disclosure, there is provided a data transmission device applicable to a terminal, the data transmission device comprising: a first preset signaling transmission module configured to transmit first preset signaling to a master node, the first preset signaling including conditional primary secondary cell addition / change (CPAC) execution instruction information, which is used to indicate that the terminal has executed a CPAC process when the CPAC process is a conditional primary secondary cell change (CPC) process, so that the master node sends second preset signaling to a source secondary node, the second preset signaling including CPC execution instruction information, which is used to indicate that the terminal has executed the CPC process.

[0042] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0043] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0044] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0045] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0046] According to some embodiments of the present disclosure, the first preset signaling further includes information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process; the first preset signaling transmitting module is further configured to transmit the first preset signaling to the master node, so that the master node obtains a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell; the second preset signaling includes information related to the CPC execution instruction information, and the information related to the CPC execution instruction information in the second preset signaling includes identification information of the target cell and the data forwarding address corresponding to the target cell.

[0047] According to some embodiments of the present disclosure, the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0048] According to another aspect of the present disclosure, there is provided a data transmission device applied to a secondary node, the data transmission device comprising: a second preset signaling receiving module configured to receive second preset signaling transmitted by a master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information, the second preset signaling including CPC execution instruction information, the CPC execution instruction information being used to indicate that a terminal has executed a CPC process; the second preset signaling being generated by the master node according to the CPAC execution instruction information in first preset signaling transmitted by the terminal when the conditional primary secondary cell addition / change (CPAC) process executed by the terminal is a CPC process; the first preset signaling including the CPAC execution instruction information, the CPAC execution instruction information being used to indicate that the terminal has executed the CPAC process.

[0049] According to some embodiments of the present disclosure, the first preset signaling is radio resource control (RRC) signaling.

[0050] According to some embodiments of the present disclosure, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0051] According to some embodiments of the present disclosure, the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0052] According to some embodiments of the present disclosure, the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0053] According to some embodiments of the present disclosure, the first preset signaling further includes information related to the CPAC execution instruction information, wherein the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the second preset signaling includes information related to the CPC execution instruction information, and the information related to the CPC execution instruction information in the second preset signaling includes identification information of the target cell and a data forwarding address corresponding to the target cell, and the data forwarding address corresponding to the target cell is obtained by the master node from the obtained data forwarding address according to the identification information of the target cell.

[0054] According to some embodiments of the present disclosure, the device further includes a data transmission module configured to trigger a late data forwarding process based on the CPC execution instruction information, transmit to the master node data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted corresponding to the terminal in the late data forwarding process, and transmit the data forwarding address corresponding to the target cell based on information related to the CPC execution instruction information so that the master node transmits the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0055] According to some embodiments of the present disclosure, the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0056] According to a further aspect of the present disclosure, there is provided a device comprising a memory, a processor, and executable instructions stored in the memory and executable on the processor, the processor, when executing the executable instructions, implementing any of the methods described above.

[0057] According to a further aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, perform any of the methods described above.

[0058] It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure.

[0059] The above and other objects, features and advantages of the present disclosure will become more apparent from the detailed description of illustrative embodiments thereof, taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0060] [Figure 1] 1 illustrates a flow diagram of a data transmission method according to an embodiment of the present disclosure. [Figure 2] 10 illustrates a flow diagram of another data transmission method according to an embodiment of the present disclosure. [Figure 3] FIG. 3 is a schematic diagram of the information interactions of the data transfer process in the case of the CPA shown in FIG. 2 . [Figure 4] 10 shows a flow diagram of a further data transmission method according to an embodiment of the present disclosure. [Figure 5]FIG. 5 is a schematic diagram of the information interaction of the data transfer process in the case of the CPC shown in FIG. 4. [Figure 6] 10 shows a flow diagram of yet another data transmission method according to an embodiment of the present disclosure. [Figure 7] 10 shows a flow diagram of yet another data transmission method according to an embodiment of the present disclosure. [Figure 8] 1 shows a block diagram of a data transmission device according to an embodiment of the present disclosure. [Figure 9] FIG. 10 shows a block diagram of another data transmission device according to an embodiment of the present disclosure. [Figure 10] 10 shows a block diagram of a further data transmission device according to an embodiment of the present disclosure. [Figure 11] FIG. 10 shows a block diagram of yet another data transmission device according to an embodiment of the present disclosure. [Figure 12] FIG. 10 shows a block diagram of yet another data transmission device according to an embodiment of the present disclosure. [Figure 13] FIG. 10 shows a block diagram of yet another data transmission device according to an embodiment of the present disclosure. [Figure 14] 1 shows a schematic structural diagram of an electronic device in one embodiment of the present disclosure; [Figure 15] FIG. 1 is a schematic structural diagram of a data transmission device according to an exemplary embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0061] Exemplary embodiments will be more fully described with reference to the accompanying drawings. However, exemplary embodiments may be embodied in multiple forms and should not be construed as limited to the examples set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The drawings are merely schematic diagrams of the present disclosure and are not necessarily drawn to scale. Note that components designated with the same reference numerals in the various drawings are the same or equivalent, and redundant description thereof will be omitted.

[0062] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will recognize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or that other methods, devices, steps, etc. may be employed. In other instances, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring or obscuring various aspects of the present disclosure.

[0063] Furthermore, terms such as "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or the number of technical features depicted. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of the features. In the description of this disclosure, "a plurality" means at least two, e.g., two, three, etc., unless expressly defined otherwise. The symbol " / " generally indicates that the former and latter associated objects are in an "or" relationship.

[0064] In the present disclosure, unless otherwise expressly specified or defined, terms such as "connected" should be interpreted broadly, for example, it may be an electrical connection, or it may be a mutual communication, it may be a direct connection, or it may be an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure depending on the specific case.

[0065] As mentioned above, one important research in MR-DC enhancement technology is to support a primary secondary cell addition / change (CPAC) process aiming to improve the success rate of the CPAC process, using the core concept that the network configures the UE to perform the primary secondary cell addition / change (CPAC) process through radio resource control (RRC) signaling, and according to the received signal quality of surrounding candidate SN cells, if a cell of a specific candidate SN meets a configuration threshold, the UE starts a synchronization process with the SN without needing to report a measurement report to the network, thereby effectively improving the success rate of the primary secondary cell addition / change process.

[0066] (1) a conditional primary secondary cell addition (CPA) process; (2) a conditional inter-SN PScell ​​change process triggered by an MN (an inter-SN primary secondary cell change refers to a change of a primary secondary cell from a cell of one SN to a cell of another SN; the present disclosure will be described using this case as an example, and hereinafter, unless otherwise specified, the conditional primary secondary cell change (CPC) process applies to this case); and (3) when one of the conditional inter-SN PScell ​​change processes triggered by an SN is performed in the network, if the network decides to use a conventional data forwarding mechanism (i.e., a late data forwarding mechanism), data forwarding using this mechanism is performed after the UE is connected to the target SN.

[0067] However, since triggering the UE's connection with the target SN in the CPAC process is initiated by the UE, the time at which the master node (MN) or source SN that triggers the CPAC process starts data transfer cannot be properly matched with the time of the UE's connection with the target SN, and an inappropriate time for triggering data transfer may cause UE data interruption or network cache overload problems.

[0068] An object of the present disclosure is to provide a data transmission method and apparatus, a device, and a readable storage medium that at least partially eliminate the problem of data interruption or network cache overload that may be caused by inappropriate times for triggering data transfer in the CPAC process.

[0069] According to a data transmission method provided in some embodiments of the present disclosure, a late data forwarding process is initiated after an instruction from the terminal to select a target secondary node is received by receiving first preset signaling sent by the terminal, the first preset signaling including CPAC execution instruction information used to indicate that the terminal has performed a CPAC process, and if the CPAC process is a conditional primary secondary cell change (CPC) process, sending to the source secondary node second preset signaling including CPC execution instruction information used to indicate that the terminal has performed the CPC process, which makes the time for triggering the late data forwarding process more appropriate, thereby avoiding technical problems such as UE data interruption or network cache overload that may be caused by an inappropriate time for triggering late data forwarding.

[0070] Therefore, some embodiments of the present disclosure provide a data transmission method that receives first preset signaling sent by a terminal, the first preset signaling including CPAC execution instruction information used to indicate that the terminal has performed a CPAC process, and, if the CPAC process is a conditional primary secondary cell change (CPC) process, sends second preset signaling to a source secondary node, the second preset signaling including CPC execution instruction information used to indicate that the terminal has performed a CPC process, thereby making the time for triggering a data forwarding process more appropriate, and thereby avoiding technical problems of UE data interruption or network cache overload that may be caused by an inappropriate time for triggering data forwarding.

[0071] 1 is a flow diagram of a data transmission method shown in accordance with an exemplary embodiment. The method shown in FIG. 1 may be applied to, for example, a master node in a dual-connectivity network, which may be, for example, a master node in a 5G multi-connectivity (MR-DC: Multi-RAT (Radio Access Technology) Dual Connectivity, or multi-connectivity for short) architecture network.

[0072] Referring to FIG. 1, a method 10 provided in an embodiment of the present disclosure may include the following steps.

[0073] In step S102, a first preset signaling sent by a terminal is received, the first preset signaling including CPAC execution instruction information, the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process, so that a late data forwarding process is executed according to the terminal that has executed the CPAC process indicated by the CPAC execution instruction information.

[0074] In some embodiments, for example, the first preset signaling may be RRC signaling.

[0075] In some embodiments, for example, the first preset signaling is at least one of uplink information transfer multi-RAT (radio access technology) dual connectivity (ULInformationTransferMRDC) signaling, radio resource control reconfiguration complete (RRCReconfigurationComplete) signaling, and radio resource control connection reconfiguration complete (RRCConnectionReconfigurationComplete) signaling.

[0076] In some embodiments, for example, the CPAC execution indication information may be a CPAC execution cell in ULInformationTransferMRDC signaling (or RRCReconfigurationComplete, RRCConnectionReconfigurationComplete), or may be a sub-cell of another cell, or may be only the signaling itself (i.e., reception of the signaling indicates that the terminal has executed the CPAC process). After the network completes the CPAC preparation phase, when the UE is connected with the target SN (i.e., performs synchronization and random access processes with candidate SNs that satisfy the indicator threshold condition), the UE can indicate to the MN through RRC signaling that the UE has executed the CPAC process. As a result, this information may be carried through ULInformationTransferMRDC signaling, and for example, a CPAC execution sub-cell may be newly added to the existing ULInformationTransferMRDC to indicate to the MN that the UE has now selected to connect with the target SN.

[0077] In some embodiments, the first preset signaling further includes information related to CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of the target secondary node selected by the terminal in the CPAC process. When the UE notifies the MN that CPAC has been performed via RRC signaling, the UE can also notify the MN of the identification information of the target cell via RRC signaling, so that the MN or the source SN obtains a corresponding data forwarding address for data forwarding based on the identification information of the target cell. For specific implementation forms, refer to Figures 2 to 5.

[0078] In step S104, if the CPAC process is a conditional primary secondary cell change (CPC) process, a second preset signaling is sent to the source secondary node, where the second preset signaling includes CPC execution indication information, and the CPC execution indication information is used to indicate that the terminal has executed the CPC process.

[0079] In some embodiments, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 (X2AP) signaling, Xn-U Address Indication signaling, and newly added Xn (XnAP) signaling.

[0080] In some embodiments, the second preset signaling is a newly added X2 signaling, and the newly added X2 signaling is at least one of a Conditional Primary Secondary Cell Change Notification signaling, a Conditional Primary Secondary Cell Change Indication signaling, and a Conditional Primary Secondary Cell Change Complete signaling.

[0081] In some embodiments, the second preset signaling is a newly added Xn signaling, and the newly added Xn signaling is at least one of a Conditional Primary Secondary Cell Change Notification signaling, a Conditional Primary Secondary Cell Change Indication signaling, and a Conditional Primary Secondary Cell Change Complete signaling.

[0082] In some embodiments, for example, when the CPAC process is a CPA process, after receiving the UE's RRC signaling including the CPAC execution instruction information, the MN directly initiates a data forwarding process to forward the data to be transmitted, for example, user data, to the target SN. For specific implementation, refer to Figures 2 and 3.

[0083] In some embodiments, for example, when the CPAC process is a CPC process, after receiving the UE's RRC signaling including the CPAC execution instruction information, the MN can forward the CPAC execution instruction information to the source SN via a second preset signaling. After receiving the CPC execution instruction information, the source SN sends user data and corresponding sequence number status transfer (SN Status Transfer) signaling to the MN. The sequence number status transfer signaling is used to transmit uplink / downlink Packet Data Convergence Protocol (PDCP) sequence number (SN) and hyperframe number (HFN) status in a data handover process in a dual connectivity system. After receiving the user data and sequence number status transfer signaling, the MN, as a forwarding node, forwards the user data and sequence number status transfer signaling to the target SN, thereby performing data forwarding. Specific embodiments may be referred to in FIGS. 4 and 5.

[0084] In some embodiments, for example, the MN may obtain a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell obtained from the RRC signaling, and then send the data forwarding address together with the identification information of the target cell to the source SN as information related to the CPC execution instruction information through the second preset signaling, so that the source SN simultaneously sends the data to be transmitted corresponding to the terminal, the sequence number status transfer signaling corresponding to the data to be transmitted, and the data forwarding address to the MN for data forwarding. For specific implementation forms, refer to Figures 4 and 5.

[0085] In other embodiments, for example, the MN can also send only the target cell's identification information to the source SN as information related to the CPC execution instruction information through the second preset signaling, and then the source SN sends the data to be transmitted corresponding to the terminal and the sequence number status transfer signaling corresponding to the data to be transmitted to the MN, and then the MN can obtain the data forwarding address corresponding to the target cell according to the target cell's identification information and perform data forwarding.

[0086] According to the data transmission method provided in the embodiment of the present disclosure, a first preset signaling is received by a terminal, the first preset signaling including CPAC execution instruction information used to indicate that the terminal has performed a CPAC process, and if the CPAC process is a conditional primary secondary cell change (CPC) process, a second preset signaling is sent to a source secondary node, the second preset signaling including CPC execution instruction information used to indicate that the terminal has performed a CPC process, so that a late data forwarding process is initiated after an instruction from the terminal to select a target secondary node is received, which makes the time for triggering the data forwarding process more appropriate, thereby avoiding technical problems such as UE data interruption or network cache overload that may be caused by an inappropriate time for triggering data forwarding.

[0087] 2 is a flow diagram of another data transmission method shown in accordance with an exemplary embodiment. The method shown in FIG. 2 is a CPA process and can be applied to a master node in a dual connectivity network, which may be, for example, a master node in a 5G multi-connectivity architecture network.

[0088] Referring to FIG. 2, a method 20 provided in an embodiment of the present disclosure may include the following steps.

[0089] In step S202, a first preset signaling is received, the first preset signaling including CPAC execution instruction information sent by the terminal and used to indicate that the terminal has executed a CPAC process and information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPA process.

[0090] In step S204, a data forwarding address corresponding to the target cell is obtained from the obtained data forwarding address according to the identification information of the target cell. If the network performs a CPA preparation process, the secondary node addition request confirmation signaling fed back by each candidate target SN received by the MN may include a data forwarding address, which may be, for example, an Internet Protocol (IP) address.

[0091] In step S206, in response to receiving the first preset signaling, a late data forwarding process is triggered based on CPAC execution instruction information, and the data to be transmitted corresponding to the terminal and the sequence number status forwarding signaling corresponding to the data to be transmitted are sent to the target secondary node according to the data forwarding address corresponding to the target cell in the late data forwarding process.

[0092] Figure 3 is a schematic diagram of information interaction in the data forwarding process for CPA shown in Figure 2. As shown in Figure 3, first, the network completes a CPA preparation process (S302). After the master node 3004 receives secondary node addition request confirmation signaling fed back from each candidate target SN, it performs RRC reconfiguration for the terminal 3002. After the terminal 3002 selects indicators such as the signal quality of surrounding cells, it selects a cell of a candidate target SN (e.g., target secondary node 3006) as a primary secondary cell. The terminal 3002 immediately triggers a CAPC execution process to perform a synchronization and random access process for the target secondary node 3006 (S304). The terminal 3002 notifies the master node 3004 that CPAC has been executed via RRC signaling (S306), and also notifies the master node 3004 of the target cell's identifier (ID) via RRC signaling (S306). After receiving the RRC signaling, the master node 3004 directly initiates a data forwarding process to forward the user data (S310) and corresponding sequence number status transfer signaling (S308) to the target secondary node 3006.

[0093] According to the data transmission method provided in the embodiment of the present disclosure, by combining the current CPA process, the UE indicates to the MN that the UE has selected a target SN through the newly added cell in RRC signaling, so that the MN can transfer user data to the target secondary node at an appropriate time, that is, the loss of user data or the increase in base station cache load caused by an inappropriate time for transferring user data can be avoided.

[0094] 4 is a flow diagram of yet another data transmission method shown in accordance with an exemplary embodiment. The method shown in FIG. 4 is for a CPC process and can be applied to a master node in a dual connectivity network, which may be, for example, a master node in a 5G multi-connectivity architecture network.

[0095] Referring to FIG. 4, a method 40 provided in an embodiment of the present disclosure may include the following steps.

[0096] In step S402, a first preset signaling is received, the first preset signaling including CPAC execution instruction information sent by the terminal and used to indicate that the terminal has executed a CPAC process and information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPC process.

[0097] In step S404, a data forwarding address corresponding to the target cell is obtained from the obtained data forwarding address according to the identification information of the target cell. When the network performs a CPC preparation process, the secondary node addition request confirmation signaling fed back by each candidate target SN received by the MN can include a data forwarding address, and the data forwarding address can be, for example, an Internet Protocol (IP) address.

[0098] In step S406, a second preset signaling including CPC execution instruction information used to indicate that the terminal has performed a CPC process and information related to the CPC execution instruction information is sent to the source secondary node, and the information related to the CPC execution instruction information in the second preset signaling includes identification information of a target cell and a data forwarding address corresponding to the target cell.

[0099] In step S408, in the late data forwarding process, data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are sent by the source secondary node that triggers the late data forwarding process based on the CPC execution instruction information, and a data forwarding address corresponding to the target cell sent by the source secondary node based on information related to the CPC execution instruction information, are received. For the CPC process, the late data forwarding process is triggered by the source secondary node, and the source secondary node receives the data forwarding address corresponding to the target cell through second preset signaling, so that in the late data forwarding process, the data forwarding address, the data to be transmitted, and the sequence number status transfer signaling corresponding to the data to be transmitted can be simultaneously sent to the master node.

[0100] In step S410, according to the data forwarding address corresponding to the target cell, the data to be transmitted and a sequence number status transfer signaling corresponding to the data to be transmitted are transmitted to the target secondary node.

[0101] Figure 5 is a schematic diagram of information interaction in the data forwarding process in the case of CPC shown in Figure 4. As shown in Figure 5, the network completes the CPC preparation process (S502), and after the master node 5004 receives secondary node addition request confirmation signaling fed back from each candidate target SN, it performs RRC reconfiguration for the terminal 5002. After the terminal 5002 selects indicators such as the signal quality of surrounding cells, it selects a cell of a certain candidate target SN (e.g., target secondary node 5008) as a primary secondary cell, and the terminal 5002 immediately triggers a CAPC execution process to perform synchronization and random access processes for the target secondary node 5008 (S504). The terminal 5002 notifies the master node 5004 that CPAC has been executed via RRC signaling (S506), and may also notify the master node 5004 of the target cell identifier via RRC signaling (S506). After the master node 5004 receives the RRC information reported from the terminal 5002, the master node 5004 sends information indicating that the CPAC process has been performed to the source secondary node 5006 via the X2 / Xn interface, where the X2 / Xn signaling may be newly added or the existing Xn-U address indication signaling (i.e., the above-mentioned second preset signaling) may be used, and the implementation manner for the X2 / Xn signaling may refer to 3GPP protocols TS38.423 / TS36.423. The master node 5004 simultaneously sends related information to the source secondary node 5006 via the newly added X2 / Xn signaling or Xn-U address indication signaling (S508), where the related information includes the ID and data forwarding address of the target cell, and instructs the source secondary node 5006 to start late data forwarding.After receiving the corresponding instruction information of the master node 5004, the source secondary node 5006 sends the data that needs to be transferred to the target secondary node 5008 (S512) and the corresponding sequence number status transfer signaling (S510) to the master node 5004 (i.e., triggers the data transfer process), and the master node 5004 sends the received user data (S516) and the corresponding sequence number status transfer signaling (S514) to the target secondary node 5008.

[0102] According to the data transmission method provided in the embodiment of the present disclosure, by combining the existing CPC process and using X2 / Xn signaling, the current connection status of the UE on the network side is indicated in a timely manner, helping the source SN trigger the data forwarding process and start forwarding user data and user data status information; meanwhile, the method has good compatibility with existing protocol procedures and can avoid excessive signaling overhead.

[0103] 6 is a flow diagram of yet another data transmission method shown in accordance with an exemplary embodiment. The method shown in FIG. 6 can be applied to a terminal in a dual connectivity network, which may be, for example, a terminal in a CPAC process.

[0104] Referring to FIG. 6, a method 60 provided in an embodiment of the present disclosure may include the following steps.

[0105] In step S602, a first preset signaling is sent to the master node, where the first preset signaling includes conditional primary secondary cell addition / change (CPAC) execution instruction information, and the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process; so that, if the CPAC process is a conditional primary secondary cell change (CPC) process, the master node sends a second preset signaling to the source secondary node, where the second preset signaling includes CPC execution instruction information, and the CPC execution instruction information is used to indicate that the terminal has executed the CPC process.

[0106] In some embodiments, the first preset signaling is RRC signaling.

[0107] In some embodiments, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0108] In some embodiments, the second preset signaling is a newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0109] In some embodiments, the second preset signaling is a newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0110] In some embodiments, the first preset signaling may further include information related to CPAC execution instruction information, where the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process. The second preset signaling may further include information related to CPC execution instruction information, where the information related to the CPC execution instruction information in the second preset signaling includes identification information of the target cell and a data forwarding address corresponding to the target cell. The master node may obtain the data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell.

[0111] In some embodiments, the first preset signaling is multi-radio access technology dual connectivity signaling for uplink information transfer.

[0112] The data transmission method on the terminal side provided in the embodiment of the present disclosure corresponds to the data transmission method on the primary base station side, so specific implementation forms can be referred to Figures 2 to 5, and will not be repeated here.

[0113] 7 is a flow diagram of yet another data transmission method shown in accordance with an exemplary embodiment. The method shown in FIG. 7 may be applied to a secondary node in a dual connectivity network, which may be, for example, a source secondary node in a CPC process.

[0114] Referring to FIG. 7, a method 70 provided in an embodiment of the present disclosure may include the following steps.

[0115] In step S702, second preset signaling sent by the master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information is received, the second preset signaling includes CPC execution instruction information, the CPC execution instruction information is used to indicate that the terminal has executed a CPC process, the second preset signaling is generated by the master node according to the CPAC execution instruction information in the first preset signaling sent by the terminal when the conditional primary secondary cell addition / change (CPAC) process executed by the terminal is a CPC process, and the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process.

[0116] In some embodiments, the first preset signaling is radio resource control (RRC) signaling.

[0117] In some embodiments, the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

[0118] In some embodiments, the second preset signaling is a newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0119] In some embodiments, the second preset signaling is a newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

[0120] In some embodiments, the first preset signaling further includes information related to CPAC execution instruction information, where the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the second preset signaling includes information related to CPC execution instruction information, where the information related to the CPC execution instruction information in the second preset signaling includes identification information of the target cell and a data forwarding address corresponding to the target cell, and the data forwarding address corresponding to the target cell is obtained by the master node from the obtained data forwarding address according to the identification information of the target cell.

[0121] In some embodiments, the late data forwarding process is triggered based on the CPC execution instruction information, and in the late data forwarding process, the source SN can send data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted to the master node, and based on information related to the CPC execution instruction information, send a data forwarding address corresponding to the target cell to the master node, so that the master node sends the data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0122] In some embodiments, the first preset signaling is at least one of multi-radio access technology dual connectivity signaling for uplink information transfer, radio resource control reconfiguration complete signaling, and radio resource control connection reconfiguration complete signaling.

[0123] The data transmission method at the secondary base station side provided in the embodiment of the present disclosure corresponds to the data transmission method at the main base station side, so for specific implementation forms, please refer to Figures 2 to 5, and the description will not be repeated here.

[0124] 8 is a block diagram of a data transmission device shown according to an exemplary embodiment. The device shown in FIG. 8 may be applied to a master node in a dual connectivity network, for example, which may be a master node in a 5G converged architecture network.

[0125] Referring to FIG. 8, the device 80 provided in the embodiment of the present disclosure may include a first preset signaling receiving module 802 and a second preset signaling transmitting module 804.

[0126] The first preset signaling receiving module 802 can be configured to receive first preset signaling transmitted by a terminal, where the first preset signaling includes conditional primary secondary cell addition / change (CPAC) execution instruction information, and the CPAC execution instruction information is used to indicate that the terminal has performed a CPAC process.

[0127] The second preset signaling sending module 804 may be configured to send second preset signaling to the source secondary node when the CPAC process is a conditional primary secondary cell change (CPC) process, where the second preset signaling includes CPC execution instruction information, and the CPC execution instruction information is used to indicate that the terminal has executed the CPC process.

[0128] 9 is a block diagram of another data transmission device shown in accordance with an exemplary embodiment. The device shown in FIG. 9 may be applied to a master node in a dual connectivity network, for example, which may be a master node in a 5G converged architecture network.

[0129] Referring to FIG. 9, the apparatus 90 provided in the embodiment of the present disclosure may include a first preset signaling receiving module 902, a second preset signaling transmitting module 904, a data transfer address obtaining module 906, a data transfer module 908, and a data transmitting module 910.

[0130] The first preset signaling receiving module 902 may be configured to receive first preset signaling transmitted by a terminal, the first preset signaling including conditional primary secondary cell addition / modification (CPAC) execution instruction information, where the CPAC execution instruction information is used to indicate that the terminal has executed a CPAC process. The first preset signaling is radio resource control (RRC) signaling. The first preset signaling may be at least one of multi-radio access technology dual connectivity signaling for uplink information transfer, radio resource control reconfiguration complete signaling, and radio resource control connection reconfiguration complete signaling. The first preset signaling may further include information related to the CPAC execution instruction information, where the information related to the CPAC execution instruction information in the first preset signaling may include identification information of a target cell of a target secondary node selected by the terminal in the CPAC process.

[0131] The data transfer address obtaining module 906 may be configured to obtain a data transfer address corresponding to the target cell from the obtained data transfer address according to the identification information of the target cell.

[0132] The second preset signaling transmitting module 904 may be configured to send second preset signaling to the source secondary node when the CPAC process is a conditional primary secondary cell change (CPC) process, where the second preset signaling may include CPC execution instruction information and information related to the CPC execution instruction information, where the CPC execution instruction information is used to indicate that the terminal has executed the CPC process, and the information related to the CPC execution instruction information in the second preset signaling includes identification information of a target cell and a data forwarding address corresponding to the target cell. The second preset signaling may be at least one of a newly added X2 signaling, an Xn-U address instruction signaling, and a newly added Xn signaling. The second preset signaling may be a newly added X2 signaling, where the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling. The second preset signaling may be a newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change completion signaling.

[0133] The data forwarding module 908 may be configured to receive, in a late data forwarding process, data to be transmitted corresponding to a terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted by a source secondary node that triggers a late data forwarding process based on CPC execution instruction information, as well as a data forwarding address corresponding to the target cell transmitted by the source secondary node based on information related to the CPC execution instruction information, and to transmit the data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node based on the data forwarding address corresponding to the target cell.

[0134] The data transmission module 910 can be configured to trigger a late data forwarding process based on CPAC execution instruction information in response to receiving the first preset signaling, and in the late data forwarding process, send data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to a data forwarding address corresponding to the target cell.

[0135] 10 is a block diagram of another data transmission device shown in accordance with an exemplary embodiment. The device shown in FIG. 10 may be, for example, a terminal in a 5G converged architecture network, for example, may be applied to a terminal in a dual connectivity network.

[0136] Referring to FIG. 10, the apparatus 100 provided in the embodiment of the present disclosure may include a first preset signaling transmission module 1002.

[0137] The first preset signaling transmitting module 1002 may be configured to transmit first preset signaling to the master node, where the first preset signaling includes conditional primary secondary cell addition / change (CPAC) execution instruction information, where the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process, whereby, when the CPAC process is a conditional primary secondary cell change (CPC) process, the master node transmits second preset signaling to the source secondary node, where the second preset signaling includes CPC execution instruction information, where the CPC execution instruction information is used to indicate that the terminal has executed the CPC process.

[0138] The first preset signaling may be radio resource control (RRC) signaling.

[0139] The first preset signaling may be at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0140] The second preset signaling may be at least one of a newly added X2 signaling, an Xn-U address indication signaling, and a newly added Xn signaling.

[0141] The second preset signaling can be a newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change completion signaling.

[0142] The second preset signaling can be a newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change completion signaling.

[0143] The first preset signaling may further include information related to CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling includes identification information of the target cell of the target secondary node selected by the terminal in the CPAC process.

[0144] The first preset signaling transmitting module 1002 may be further configured to send first preset signaling to the master node, so that the master node obtains a data forwarding address corresponding to the target cell from the obtained data forwarding address according to the identification information of the target cell; the second preset signaling may further include information related to CPC execution instruction information, where the information related to the CPC execution instruction information in the second preset signaling includes the identification information of the target cell and the data forwarding address corresponding to the target cell.

[0145] 11 is a block diagram of another data transmission device shown in accordance with an exemplary embodiment. The device shown in FIG. 11 may be applied to a secondary node in a dual connectivity network, for example, which may be a target secondary node in a 5G converged architecture network.

[0146] Referring to FIG. 11, the device 110 provided in the embodiment of the present disclosure may include a data receiving module 1102 .

[0147] The data receiving module 1102 may be configured to receive data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted by the master node to the target secondary node according to a data forwarding address corresponding to the target cell.

[0148] 12 is a block diagram of another data transmission device shown in accordance with an exemplary embodiment. The device shown in FIG. 12 may be applied to a secondary node in a dual connectivity network, for example, which may be a source secondary node in a 5G converged architecture network.

[0149] Referring to FIG. 12, the apparatus 120 provided in the embodiment of the present disclosure may include a second preset signaling receiving module 1202.

[0150] The second preset signaling receiving module 1202 may be configured to receive second preset signaling sent by the master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information, where the second preset signaling includes CPC execution instruction information, where the CPC execution instruction information is used to indicate that the terminal has executed a CPC process, where the second preset signaling is generated by the master node according to the CPAC execution instruction information in the first preset signaling sent by the terminal when the conditional primary secondary cell addition / change (CPAC) process executed by the terminal is a CPC process, where the first preset signaling includes the CPAC execution instruction information, where the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process.

[0151] 13 is a block diagram of another data transmission device shown in accordance with an exemplary embodiment. The device shown in FIG. 13 may be, for example, a secondary node in a 5G converged architecture network, for example, a secondary node in a dual connectivity network.

[0152] Referring to FIG. 13, the apparatus 130 provided in the embodiment of the present disclosure may include a second preset signaling receiving module 1302 and a data transmitting module 1304.

[0153] The second preset signaling receiving module 1302 may be configured to receive second preset signaling sent by the master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information, where the second preset signaling includes CPC execution instruction information, where the CPC execution instruction information is used to indicate that the terminal has executed a CPC process, where the second preset signaling is generated by the master node according to the CPAC execution instruction information in the first preset signaling sent by the terminal when the conditional primary secondary cell addition / change (CPAC) process executed by the terminal is a CPC process, where the first preset signaling includes the CPAC execution instruction information, where the CPAC execution instruction information is used to indicate that the terminal has executed the CPAC process.

[0154] The first preset signaling may be RRC signaling.

[0155] The first preset signaling may be at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

[0156] The second preset signaling may be at least one of a newly added X2 signaling, an Xn-U address indication signaling, and a newly added Xn signaling.

[0157] The second preset signaling can be a newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change completion signaling.

[0158] The second preset signaling is an existing X2 / Xn signaling or a newly added Xn signaling, and the existing X2 / Xn signaling or the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change completion signaling.

[0159] The first preset signaling may further include information related to CPAC execution instruction information, where the information related to the CPAC execution instruction information in the first preset signaling may include identification information of a target cell of a target secondary node selected by the terminal in the CPAC process, the second preset signaling may include information related to CPC execution instruction information, where the information related to the CPC execution instruction information in the second preset signaling may include identification information of the target cell and a data forwarding address corresponding to the target cell, where the data forwarding address corresponding to the target cell is obtained by the master node from the obtained data forwarding address according to the identification information of the target cell.

[0160] The data transmission module 1304 can be configured to trigger a late data forwarding process based on the CPC execution instruction information, send data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted to the master node in the late data forwarding process, and send a data forwarding address corresponding to the target cell to the master node based on information related to the CPC execution instruction information, so that the master node sends the data to be transmitted and sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

[0161] For the specific implementation of each module in the device provided in the embodiment of the present disclosure, reference can be made to the content of the above method, which will not be repeated here.

[0162] 14 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. Note that the device shown in FIG. 14 is merely an example of a computer system and does not limit the functionality and scope of use of the embodiment of the present disclosure.

[0163] 14, the device 140 includes a central processing unit (CPU) 1401 that can perform various appropriate operations and processes in accordance with a program stored in a read-only memory (ROM) 1402 or a program loaded from a storage unit 1408 into a random access memory (RAM) 1403. The RAM 1403 also stores various programs and data necessary for the operation of the device 140. The CPU 1401, the ROM 1402, and the RAM 1403 are interconnected via a bus 1404. An input / output (I / O) interface 1405 is also connected to the bus 1404.

[0164] The I / O interface 1405 is connected to an input unit 1406 including a keyboard, a mouse, etc., an output unit 1407 including a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), etc., and speakers, a storage unit 1408 including a hard disk, etc., and a communication unit 1409 including a network interface card such as a LAN card, a modem, etc. The communication unit 1409 performs communication processing via a network such as the Internet. A drive 1410 is also connected to the input / output interface 1405 as needed. Removable media 1411 such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory is loaded into the drive 1410 as needed, and a computer program read from the removable media 1411 is installed in the storage unit 1408 as needed.

[0165] In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flow diagrams may be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, the computer program product comprising a computer program carried on a computer-readable medium, the computer program including program code for performing the methods illustrated by the flow diagrams. In such an embodiment, the computer program may be downloaded and installed from a network via the communication unit 1409 and / or installed from removable media 1411. The above-described functions defined in the system of the present disclosure are performed when the computer program is executed by the central processing unit (CPU) 1401.

[0166] It should be noted that the computer-readable medium referred to in this disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. The computer-readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program, and the program can be used by or in conjunction with an instruction execution system, apparatus, or device. However, in this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying computer-readable program code. Such a propagated data signal may take various forms, including, but not limited to, an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which is capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device. Program code contained in a computer-readable medium may be transmitted using any suitable medium, including, but not limited to, wireless, wire, optical cable, RF (radio frequency), etc., or any suitable combination of the above.

[0167] The flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flow diagram or block diagram may represent a module, program segment, or portion of code, including one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur in an order different from that noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially simultaneously, or the blocks may sometimes be executed in the reverse order, depending on the functionality involved. It should also be noted that each block of the block diagrams and / or flow diagrams, and combinations of blocks in the block diagrams and / or flow diagrams, may be implemented by a dedicated hardware-based system that performs the specified functions or operations, or a combination of dedicated hardware and computer instructions.

[0168] The related modules described in the embodiments of the present disclosure may be implemented by software or hardware. The described modules may also be provided within a processor, which may be described as a processor including, for example, a first preset signaling receiving module and a second preset signaling transmitting module. The names of these modules may not necessarily be limiting on the modules themselves; for example, the first preset signaling receiving module may also be described as a "module for receiving first preset signaling from a terminal."

[0169] In another aspect, the present disclosure also provides a computer-readable medium, which may be included in the device described in the above embodiments or may exist separately from the device. The computer-readable medium has one or more programs mounted thereon, which, when executed by the device, causes the device to receive first preset signaling transmitted by a terminal, the first preset signaling including conditional primary secondary cell addition / change (CPAC) execution indication information, where the CPAC execution indication information is used to indicate that the terminal has performed the CPAC process, and if the CPAC process is a conditional primary secondary cell change (CPC) process, causes the device to transmit second preset signaling to a source secondary node, the second preset signaling including CPC execution indication information, where the CPC execution indication information is used to indicate that the terminal has performed the CPC process.

[0170] 15, which is a schematic structural diagram of a data transmission device 150 shown according to an exemplary embodiment. The device 150 may be provided as a base station. Referring to FIG. 15, the device 150 includes a processing assembly 1522, a wireless transmit / receive assembly 1524, an antenna assembly 1526, and a signal processing part specific to the wireless interface, and the processing assembly 1522 may further include one or more processors.

[0171] One of the processors in the processing assembly 1522 may be configured to receive first preset signaling transmitted by the terminal, the first preset signaling including conditional primary secondary cell addition / change (CPAC) execution instruction information used to indicate that the terminal has performed a CPAC process, and, if the CPAC process is a conditional primary secondary cell change (CPC) process, to transmit second preset signaling to the source secondary node, the second preset signaling including CPC execution instruction information used to indicate that the terminal has performed the CPC process.

[0172] While exemplary embodiments of the present disclosure have been specifically shown and described above, it is to be understood that the present disclosure is not limited to the precise configuration, arrangement, or implementation described herein, but rather, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. receiving first preset signaling transmitted from a terminal, the first preset signaling including CPAC execution instruction information for indicating that the terminal has performed a conditional primary secondary cell addition / modification (CPAC) process and information related to the CPAC execution instruction information, the information related to the CPAC execution instruction information in the first preset signaling including identification information of a target cell of a target secondary node selected by the terminal in the CPAC process; Obtaining a data transfer address corresponding to the target cell from the obtained data transfer address according to the identification information of the target cell; If the CPAC process is a conditional primary secondary cell change (CPC) process, transmitting second preset signaling to a source secondary node, the second preset signaling including CPC execution indication information for indicating that the terminal has executed the CPC process and information related to the CPC execution indication information, and the information related to the CPC execution indication information in the second preset signaling including identification information of the target cell and the data forwarding address corresponding to the target cell; In a late data forwarding process, receiving data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted from the source secondary node that triggers the late data forwarding process based on the CPC execution instruction information, and the data forwarding address corresponding to the target cell transmitted from the source secondary node based on information related to the CPC execution instruction information; Sending the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell; A data transmission method applied to the master node, including:

2. The data transmission method according to claim 1 , wherein the first preset signaling is a radio resource control (RRC) signaling.

3. 2. The data transmission method of claim 1, wherein the second preset signaling is at least one of existing X2 / Xn signaling, newly added X2 signaling, Xn-U address indication signaling, and newly added Xn signaling.

4. 4. The data transmission method according to claim 3, wherein the second preset signaling is the newly added X2 signaling, and the newly added X2 signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

5. 4. The data transmission method according to claim 3, wherein the second preset signaling is the newly added Xn signaling, and the newly added Xn signaling is at least one of a conditional primary secondary cell change notification signaling, a conditional primary secondary cell change instruction signaling, and a conditional primary secondary cell change complete signaling.

6. When the CPAC process is a conditional primary secondary cell addition (CPA) process, the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPA process; The method comprises:

2. The data transmission method according to claim 1, further comprising: triggering a late data transfer process based on the CPAC execution instruction information in response to receiving the first preset signaling; and in the late data transfer process, transmitting to the target secondary node, data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, according to the data transfer address corresponding to the target cell.

7. 2. The data transmission method according to claim 1, wherein the first preset signaling is at least one of a multi-radio access technology dual connectivity signaling for uplink information transfer, a radio resource control reconfiguration complete signaling, and a radio resource control connection reconfiguration complete signaling.

8. transmitting first preset signaling to a master node, the first preset signaling including: CPAC execution instruction information for indicating that the terminal has performed a conditional primary secondary cell addition / modification (CPAC) process; and information related to the CPAC execution instruction information, the information related to the CPAC execution instruction information in the first preset signaling including identification information of a target cell of a target secondary node selected by the terminal in the CPAC process; As a result, the master node Obtaining a data transfer address corresponding to the target cell from the obtained data transfer address according to the identification information of the target cell; If the CPAC process is a conditional primary secondary cell change (CPC) process, send second preset signaling to a source secondary node, the second preset signaling including CPC execution indication information for indicating that the terminal has executed the CPC process and information related to the CPC execution indication information, and the information related to the CPC execution indication information in the second preset signaling includes identification information of the target cell and the data forwarding address corresponding to the target cell; In a late data forwarding process, receiving data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted from the source secondary node that triggers the late data forwarding process based on the CPC execution instruction information, and the data forwarding address corresponding to the target cell transmitted from the source secondary node based on information related to the CPC execution instruction information; A data transmission method applied to a terminal, which transmits the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell.

9. receiving second preset signaling transmitted from a master node according to conditional primary secondary cell addition / change (CPAC) execution instruction information, the second preset signaling including CPC execution instruction information for indicating that the terminal has performed a conditional primary secondary cell change (CPC) procedure and information related to the CPC execution instruction information, the information related to the CPC execution instruction information in the second preset signaling including identification information of a target cell and a data forwarding address corresponding to the target cell, and receiving second preset signaling, when the second preset signaling is a CPAC process, the second preset signaling is generated by the master node according to the CPAC execution instruction information in first preset signaling transmitted from the terminal, the first preset signaling including the CPAC execution instruction information for indicating that the terminal has executed the CPAC process and information related to the CPAC execution instruction information, and the information related to the CPAC execution instruction information in the first preset signaling including identification information of a target cell of a target secondary node selected by the terminal in the CPAC process; Trigger a late data transfer process based on the CPC execution instruction information, and in the late data transfer process, transmit data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, and transmit the data transfer address corresponding to the target cell based on information related to the CPC execution instruction information; As a result, the master node sends the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell; The data transmission method applied to the secondary node, including:

10. a first preset signaling receiving module configured to receive first preset signaling transmitted by a terminal, the first preset signaling including: CPAC execution instruction information for indicating that the terminal has performed a conditional primary secondary cell addition / modification (CPAC) process; and information related to the CPAC execution instruction information, wherein the information related to the CPAC execution instruction information in the first preset signaling includes identification information of a target cell of a target secondary node selected by the terminal in the CPAC process; a data transfer address obtaining module configured to obtain a data transfer address corresponding to the target cell from the obtained data transfer address according to the identification information of the target cell; a second preset signaling transmission module configured to transmit second preset signaling to a source secondary node when the CPAC process is a conditional primary secondary cell change (CPC) process, the second preset signaling including CPC execution indication information for indicating that the terminal has executed the CPC process and information related to the CPC execution indication information, and the information related to the CPC execution indication information in the second preset signaling including identification information of the target cell and the data forwarding address corresponding to the target cell; a data forwarding module configured to receive, in a late data forwarding process, data to be transmitted corresponding to the terminal and sequence number status transfer signaling corresponding to the data to be transmitted, which are transmitted from the source secondary node that triggers the late data forwarding process based on the CPC execution instruction information, and the data forwarding address corresponding to the target cell transmitted from the source secondary node based on information related to the CPC execution instruction information, and to transmit the data to be transmitted and the sequence number status transfer signaling corresponding to the data to be transmitted to the target secondary node according to the data forwarding address corresponding to the target cell; A data transmission device applied to a master node, comprising:

11. 10. A device comprising a memory, a processor, and executable instructions stored in the memory and executable on the processor, the processor, when executing the executable instructions, performing the method of any one of claims 1 to 9.

12. A computer readable storage medium having stored thereon computer executable instructions which, when executed by a processor, perform the method of any one of claims 1 to 9.

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