Communication method, related apparatus and communication system

Abstract

The present application provides a communication method, a related apparatus and a communication system, which can ensure efficient resource scheduling between terminal devices and primary and secondary network devices, thereby improving the uplink transmission rate. The method comprises: a terminal device receives first information, the first information being used for indicating at least one split ratio of a first RB, and the first RB being a split bearer between a first access network device / a second access network device and the terminal device; and the terminal device determines a first split ratio from the at least one split ratio, and transmits uplink data of the first RB on the basis of the first split ratio.

Description

Communication method, related device and communication system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311871987.X and application name “Communication Method, Related Device and Communication System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method, related devices and a communication system. Background Art

[0003] In wireless communication systems, for example, in dual connectivity (DC) scenarios, there is a split bearer mode, where a bearer uses the air interface resources of both a primary access network device and a secondary access network device for data transmission. This split bearer mode can include split bearers with the data anchor point on the primary access network device and split bearers with the data anchor point on the secondary access network device.

[0004] When using offload bearer mode for uplink transmission, the terminal device needs to distribute the data cached on the packet data convergence protocol (PDCP) to the corresponding radio link control (RLC) of the primary and secondary access network devices according to the scheduling information of the primary and secondary access network devices, and then assemble the data into packets and send them to the primary and secondary access network devices. However, in actual transmission, in order to speed up data processing, the terminal device will distribute the data cached on the PDCP to the corresponding RLC of the primary and secondary access network devices according to its own algorithm before receiving the scheduling information. However, the primary and secondary access network devices cannot achieve efficient resource scheduling, which affects the uplink transmission rate. Summary of the Invention

[0005] The present application provides a communication method, related devices and a communication system to achieve efficient resource scheduling and improve the uplink transmission rate.

[0006] In a first aspect, the present application provides a communication method that can be applied to a communication device. For example, the communication device can be a terminal device, or a component configured in the terminal device (such as a chip, a chip system, etc.), or a logic module or software that can implement all or part of the terminal device functions, which is not limited by the present application. For ease of understanding and explanation, the following describes the method using a terminal device as an example of a communication device.

[0007] Exemplarily, the method includes: receiving first information, the first information being used to indicate at least one diversion ratio of a first radio bearer (RB), the first RB being a diversion bearer between a first access network device and a second access network device, and the terminal device; determining a first diversion ratio, the first diversion ratio belonging to the at least one diversion ratio; and transmitting uplink data of the first RB according to the first diversion ratio.

[0008] Exemplarily, the first RB may be a data radio bearer (DRB), a signaling radio bearer (SRB) or a multicast and broadcast service (MBS) RB (MRB for short).

[0009] Based on the above technical solution, the terminal device determines a first diversion ratio from at least one diversion ratio of the first RB received in advance for transmitting the uplink data of the first RB. Since at least one diversion ratio is indicated to the terminal device through negotiation by the first access network device and the second access network device, and the way in which the terminal device determines the first diversion ratio is consistent with the access network device, the method provided in this application can ensure that the diversion ratio used on the network side is consistent with the diversion ratio used by the terminal device, which is conducive to the first and second access network devices to achieve efficient scheduling of resources and improve the uplink transmission efficiency.

[0010] Optionally, the first diversion ratio of at least one diversion ratio is the ratio of any two of the following data amounts: the amount of uplink data of the first RB diverted to the first access network device, the amount of uplink data of the first RB diverted to the second access network device, or the amount of uplink data of the first RB.

[0011] Optionally, the first diversion ratio may be any diversion ratio among at least one diversion ratio.

[0012] In one possible implementation, the terminal device determines the first diversion ratio based on the first information. In other words, if the terminal device does not receive other information indicating the first diversion ratio, the terminal device and the access network device determine the first diversion ratio among the at least one diversion ratio as the first diversion ratio.

[0013] Exemplarily, the first split ratio is the first split ratio among the at least one split ratio.

[0014] Based on this method, it is not necessary to indicate the first split ratio through other additional information, thereby reducing signaling overhead.

[0015] In another possible implementation, the terminal device determines the first diversion ratio according to second information, where the second information is used to indicate the first diversion ratio.

[0016] The second information may be sent by the first access network device to the terminal device or sent by the second access network device to the terminal device.

[0017] Based on this method, the terminal device can more flexibly determine the first split ratio from at least one split ratio.

[0018] Optionally, the method further includes: receiving second information from the first access network device.

[0019] Exemplarily, the second information includes an indication of the first RB and an indication of the first split ratio.

[0020] Optionally, the first information and the second information are carried in the same radio resource control (RRC) signaling. For example, the RRC reconfiguration message indicates at least one split ratio of the first RB and indicates the first split ratio.

[0021] Optionally, the first information is carried in RRC signaling, and the second information is carried in media access control (MAC) layer signaling, physical layer signaling or PDCP control packet data unit (PDU).

[0022] The MAC layer signaling may be, for example, a MAC control element (CE) (MAC CE for short), and the physical layer signaling may be, for example, downlink control information (DCI).

[0023] In a possible implementation, the at least one diversion ratio corresponds to at least one duration and / or at least one data volume.

[0024] The duration #1 in at least one duration refers to the diversion ratio of the terminal device within the duration #1 using the duration #1 as a unit. In other words, when the terminal device diverts the uplink data of the first RB, it must ensure that the diversion ratio within any duration #1 satisfies the diversion ratio corresponding to the duration #1.

[0025] Data amount #4 in the at least one data amount refers to the diversion ratio corresponding to data amount #4 used by the terminal device in units of data amount #4. In other words, when the terminal device diverts the uplink data of the first RB, it must ensure that the diversion ratio of the data in each data amount #4 satisfies the diversion ratio corresponding to data amount #4. The above-mentioned data amount #4 can be the data size or the number of data packets.

[0026] Based on this, more accurate diversion of the uplink data of the first RB can be achieved.

[0027] In a possible implementation, the method further includes: determining a first time period and / or the first data volume corresponding to the first diversion ratio.

[0028] Exemplarily, the terminal device may determine the first time period and / or the first data volume corresponding to the first diversion ratio based on the first diversion ratio and the correspondence between the first diversion ratio and the first duration and / or the first data volume.

[0029] The corresponding relationship may be indicated by the first access network device or the second access network device.

[0030] Optionally, the method further includes: receiving fourth information, the fourth information indicating a correspondence between at least one diversion ratio and at least one duration and / or at least one data volume, the correspondence including a correspondence between the first diversion ratio and the first duration and / or the first data volume. In this case, the fourth information may be carried in the same RRC signaling as the first information.

[0031] Alternatively, the fourth information indicates a correspondence between the first offload ratio and the first duration and / or the first data volume. In this case, the fourth information may be carried in MAC layer signaling, physical layer signaling, or PDCP PDU.

[0032] In one possible implementation, transmitting the uplink data of the first RB according to the first diversion ratio includes: diverting the uplink data of the first RB according to the first diversion ratio, determining first data and second data, the first data corresponding to the first access network device, and the second data corresponding to the second access network device; transmitting the first data to the first access network device; transmitting the second data to the second access network device.

[0033] Optionally, before transmitting the first data to the first access network device, the method further includes: determining first cache information based on the first data; and sending a first buffer status report (buffer status reporting, BSR) to the first access network device, wherein the first BSR includes the first cache information.

[0034] Optionally, the method further includes: canceling a BSR that is triggered before sending the first BSR but not sent to the first access network device. The BSR is determined by the terminal device based on uplink data of the first RB, rather than based on the first offload ratio.

[0035] Optionally, before transmitting the second data to the second access network device, the method further includes: determining second cache information based on the second data, and sending a second BSR to the second access network device, where the second BSR includes the second cache information.

[0036] Optionally, the method further includes: canceling a BSR that is triggered before sending the second BSR but not sent to the second access network device.

[0037] In a second aspect, the present application provides a communication method that can be applied to a communication device. For example, the communication device can be an access network device, or a component configured in the access network device (such as a chip, chip system, etc.), or a logic module or software that can implement all or part of the functions of the access network device, which is not limited by the present application. For ease of understanding and explanation, the following describes the method using the first access network device as an example of a communication device.

[0038] Exemplarily, the method includes: determining first information, the first information being used to indicate at least one diversion ratio of the first RB, the first RB being a diversion bearer between the first access network device and the second access network device and the terminal device; and sending the first information.

[0039] For the description of the first RB and at least one split ratio, please refer to the first aspect and will not be repeated here.

[0040] Based on the above technical solution, the first access network device indicates at least one diversion ratio of the first RB to the terminal device through the first information, so that the terminal device can determine the first diversion ratio for diverting the uplink data of the first RB from the at least one diversion ratio. Since the at least one diversion ratio is indicated to the terminal device through negotiation on the network side, and the way the terminal device determines the first diversion ratio is consistent with that of the access network device, the method of the present application can ensure that the diversion ratio used by the network side is consistent with the diversion ratio used by the terminal device, which is beneficial for the first and second network access devices to achieve efficient resource scheduling and improve uplink transmission efficiency.

[0041] In a possible implementation manner, the method further includes: sending the second information, where the second information is used to indicate a first split ratio among the at least one split ratio.

[0042] Exemplarily, the second information includes an indication of the first RB and an indication of the first split ratio.

[0043] Optionally, the first information and the second information are carried in the same RRC signaling. Alternatively, the first information is carried in the RRC signaling, and the second information is carried in the MAC layer signaling, the physical layer signaling, or the PDCP PDU.

[0044] That is, the first information and the second information may be sent simultaneously or separately.

[0045] In a possible implementation, the at least one diversion ratio corresponds to at least one time period and / or at least one data volume.

[0046] For the description of time period and data volume, please refer to the description of the first aspect and will not be repeated here.

[0047] Optionally, the method further includes: sending fourth information. The description of the fourth information can refer to the description of the first aspect and will not be repeated here.

[0048] In a possible implementation manner, the method further includes: receiving third information from the second access network device, where the third information is used to update the diversion ratio.

[0049] Optionally, the third information includes an uplink transmission bit rate currently provided by the second access network device for the first RB, and / or an uplink transmission bit rate predicted by the second access network device to be provided for the first RB.

[0050] Optionally, the third information includes a traffic splitting ratio that the second access network device expects to use.

[0051] In a possible implementation manner, the method further includes: receiving a first message from a second access network device, where the first message is used to determine the first information.

[0052] Based on this, the access network device can adjust the diversion ratio on the terminal device side in time when the air interface resources change, so that the terminal device can adjust the diversion ratio in time according to the changes in the air interface resources on the access network device side.

[0053] Optionally, the first message includes an uplink transmission bit rate provided by the second access network device for the first RB.

[0054] Optionally, the sending the first information includes: sending the first information to a terminal device.

[0055] Optionally, the method further includes: sending the first information to a second access network device.

[0056] In a third aspect, the present application provides a communication method that can be applied to a communication device. For example, the communication device can be an access network device, or a component configured in the access network device (such as a chip, chip system, etc.), or a logic module or software that can implement all or part of the functions of the access network device, which is not limited by the present application. For ease of understanding and explanation, the following describes the method using the second access network device as an example of a communication device.

[0057] Exemplarily, the method includes: receiving first information, the first information being used to indicate at least one offload ratio of the first RB, the first RB being an offload bearer between a first access network device and a second access network device, and the terminal device, wherein the second access network device is an access network device for which a first radio bearer RB has not been established.

[0058] Based on the above technical solution, the second access network device can determine the proportion of scheduling uplink resources based on at least one diversion ratio of the first RB received in advance. Therefore, this method is conducive to the first and second access network devices to achieve efficient resource scheduling and improve uplink transmission efficiency.

[0059] In a possible implementation manner, the method further includes: sending a first message to the second access network device, where the first message is used to determine the first information.

[0060] In a possible implementation manner, the first message includes an uplink transmission bit rate provided by the second access network device for the first RB.

[0061] In a possible implementation, third information is sent to the first access network device, where the third information is used to update the traffic diversion ratio.

[0062] In combination with the third aspect, in certain implementations of the third aspect, the third information includes the uplink transmission bit rate currently provided by the second access network device for the first RB, and / or the uplink transmission bit rate predicted by the second access network device to be provided for the first RB.

[0063] In a fourth aspect, the present application provides a communication device, comprising modules or units for implementing the method in any of the above aspects and any possible implementation of any aspect. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0064] In a fifth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the method described in any of the above aspects and any possible implementation of any of the aspects.

[0065] The apparatus may further include a memory for storing a computer program and / or a configuration file of the logic circuit. The memory is coupled to the processor, and when the processor executes instructions stored in the memory, the method described in the above aspects may be implemented.

[0066] The apparatus may further include a communication interface, where the communication interface is used for the apparatus to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.

[0067] In a sixth aspect, the present application provides a chip system comprising at least one processor for supporting the implementation of the functions involved in any of the above aspects and any possible implementation of any aspect, for example, receiving or processing the data and / or information involved in the above method.

[0068] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0069] The chip system can be composed of chips, or can include chips and other discrete devices.

[0070] In a seventh aspect, the present application provides a computer-readable storage medium comprising a computer program, which, when executed on a computer, enables the computer to implement any of the above aspects and any possible implementation of any of the aspects.

[0071] In an eighth aspect, the present application provides a computer program product, comprising: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any of the above aspects and any possible implementation of any aspect.

[0072] In a ninth aspect, the present application provides a communications system comprising the aforementioned terminal device, a first access network device, and a second access network device. The terminal device is configured to execute the method according to the aforementioned first aspect and any possible implementation thereof; the second access network device is configured to execute the method according to the aforementioned second aspect and any possible implementation thereof; and the second access network device is configured to execute the method according to the aforementioned third aspect and any possible implementation thereof.

[0073] It should be understood that the fourth to ninth aspects of the present application correspond to the technical solutions of the first to third aspects of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] FIG1 is a schematic diagram of the architecture of a communication system applicable to the method provided in an embodiment of the present application;

[0075] FIG2 is a schematic diagram of a DRB provided in an embodiment of the present application;

[0076] FIG3 is a schematic flow chart of a communication method provided in an embodiment of the present application;

[0077] FIG4 is another schematic flow chart of a communication method provided in an embodiment of the present application;

[0078] FIG5 is another schematic flow chart of the communication method provided in an embodiment of the present application;

[0079] Figures 6 and 7 are schematic block diagrams of devices provided in embodiments of the present application;

[0080] FIG8 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0081] FIG9 is a schematic structural diagram of a wireless access network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0082] The technical solution in this application will be described below with reference to the accompanying drawings.

[0083] To facilitate understanding of the embodiments of the present application, the following points are first explained:

[0084] First, in the embodiments of this application, prefixes such as "first" and "second" are used solely to distinguish and describe different things belonging to the same category, and do not constrain the order, size, or quantity of the things. For example, "first access network device" and "second access network device" are simply different devices, and do not restrict the number of devices or their priority. For another example, "first information" and "second information" are simply different pieces of information, and do not have a size or priority relationship between them.

[0085] Second, the "sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. For example, "sending first information to a terminal device" can be understood as the destination end of the first information being the terminal device, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving first information from a first access network device" can be understood as the source end of the first information being the first access network device, which can include direct receiving from the first access network device through the air interface, and also includes indirect receiving from the first access network device through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0086] In other words, sending and receiving can be carried out between devices, for example, between a terminal device and a first access network device; or it can be carried out within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0087] It is understood that before information is sent from the source to the destination, it may undergo necessary processing, such as encoding and modulation. After receiving the information from the source, the destination may also perform corresponding processing, such as decoding and demodulation, to interpret the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0088] Third, in the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship, but does not exclude the situation where the previous and next associated objects are in an "and" relationship. The specific meaning can be understood in conjunction with the context. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0089] Fourth, in the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein the other information has an association relationship with the information to be indicated; or only a part of the information to be indicated may be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information may be achieved by means of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication.

[0090] It can be understood that, for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0091] Fifth, in the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device (such as a network device or a terminal device) will make corresponding processing under certain objective circumstances. It does not limit the time, and does not require the device (such as a network device or a terminal device) to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0092] Sixth, the predefined in this application can be understood as: define, predefine, store, pre-store, pre-negotiate, pre-configure, solidify, or pre-burn.

[0093] The technical solutions provided in this application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) mobile communication system or new radio access technology (NR), satellite communication system, etc. Among them, the 5G mobile communication system can include non-standalone (NSA) and / or standalone (SA) networking.

[0094] The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system, etc. This application does not limit this.

[0095] In this application, a radio access network (RAN) device is a device with wireless transceiver capabilities. It can provide wireless communication services and connect terminals to a wireless network. It can be a node in a radio access network, referred to as a RAN node.

[0096] In one possible scenario, a RAN node can be a base station (BS), an evolved NodeB (eNodeB), a transmission reception point (TRP), a home evolved NodeB (HNB), a wireless fidelity (Wi-Fi) access point (AP), a mobile switching center, a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation NodeB in a 6G mobile communication system, or a base station in a future mobile communication system. A RAN node can also be a device that performs base station functions in device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, machine-to-machine (M2M) communication systems, and Internet of Things (IoT) communication systems. A RAN node can also be a RAN node in a non-terrestrial network (NTN), meaning that the RAN node can be deployed on a high-altitude platform or satellite.

[0097] A RAN node can be a macro base station, a micro base station, an indoor base station, a relay node, a donor node, or a radio controller in a cloud radio access network (CRAN) scenario, or a node in an open radio access network (O-RAN or ORAN) scenario. Alternatively, a RAN node can be a server, a wearable device, a vehicle, or an onboard device. For example, a RAN node in V2X technology can be a roadside unit (RSU). Of course, a RAN node can also be a node in the core network.

[0098] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0099] In different systems, CU (or CU-CP and CU-UP), DU or RU may have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called open CU (O-CU), DU may also be called open DU (O-DU), CU-CP may also be called open CU-CP (O-CU-CP), CU-UP may also be called open CU-UP (O-CU-UP), and RU may also be called open RU (O-RU). For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description.

[0100] Among them, any unit among CU (or CU-CP, CU-UP), DU and RU can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. That is, the wireless access network device in this application can be a virtualized device, for example, implemented by general hardware and instantiated virtualization functions, or by dedicated hardware and instantiated virtualization functions. Among them, the general hardware can be a server, such as a cloud server.

[0101] The terminal device in this application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0102] The terminal device may be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. At present, some examples of terminal devices may include: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, drones, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). Mobile network, PLMN) terminal equipment, etc.

[0103] Wearable devices, also known as wearable smart devices, are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include those that are fully functional, large in size, and can achieve full or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0104] Furthermore, terminal devices can also be end devices in IoT systems. IoT is a crucial component of future information technology development. Its primary technical feature is connecting objects to the internet through communication technologies, thereby enabling intelligent networks that interconnect humans and machines, and objects and things. IoT technology, for example, utilizes narrowband (NB) technology to achieve massive connectivity, deep coverage, and power-saving terminals.

[0105] In addition, terminal devices can also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (part of the terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0106] The terminal device in this application may be a virtualized device, for example, implemented by general-purpose hardware and instantiated virtualization functions, or by dedicated hardware and instantiated virtualization functions. The general-purpose hardware may be a server, for example, a cloud server.

[0107] It should be understood that the present application does not limit the specific forms of the wireless access network device and the terminal device.

[0108] Figure 1 is a schematic diagram of the architecture of a communication system 100 applicable to the method provided in an embodiment of the present application. As shown in Figure 1, the communication system 100 includes a terminal device 110, an access network device 120, an access network device 130, and a core network. When the terminal device 110 supports dual connectivity, the terminal device 110 can be connected to both the access network device 120 and the access network device 130 simultaneously, with both access network devices providing services to the terminal device 110, thereby improving the terminal's transmission rate and reliability.

[0109] The dotted arrow in Figure 1 represents the control plane connection between terminal device 110 and the network. In this application, the access network device used to carry the control plane connection is referred to as the primary access network device, i.e., access network device 120 is the primary access network device; the other access network device is referred to as the secondary access network device, i.e., access network device 130 is the secondary access network device.

[0110] It should be understood that the secondary access network device is added to the terminal device by the primary access network device. This process can be referred to in existing technologies and will not be described in detail here. In other words, the access network device that the terminal device first connects to can be called the primary access network device, and the access network device that it connects to later can be called the secondary access network device.

[0111] The solid arrows shown in Figure 1 represent the data link between terminal device 110 and the network. For downlink data, after data is transmitted from the core network to access network device 130, access network device 130 can split the data into two parts: one part is sent to terminal device 110 via the air interface of access network device 130, and the other part is sent to access network device 120 via a communication interface (e.g., Xn or X2 interface), and then sent to terminal device 110 via the air interface of access network device 120. For uplink data, terminal device 110 splits the downlink data into two parts: one part is sent to access network device 130 via the air interface of access network device 130, and the other part is sent to access network device 120 via the air interface of access network device 120, and then sent to access network device 130 via a communication interface. The two parts of data are aggregated at access network device 130, and access network device 130 sends the aggregated data to the core network.

[0112] That is, in the communication system shown in FIG1 , the data anchor point is at the access network device 130 (secondary access network device). Therefore, the access network device 130 can be referred to as a data anchor station. Optionally, the present application also supports the data anchor point being at the primary access network device, for example, the data anchor point being at the access network device 120. When the access network device 120 serves as the data anchor station, for downlink, the access network device 120 distributes the data; for uplink, data aggregation is completed on the access network device 120 side. For details, please refer to the description of the data anchor point at the access network device 130 above, which will not be repeated here.

[0113] It should be understood that whether the data anchor point is at the primary access network device or the secondary access network device is determined by the primary access network device.

[0114] In this application, the primary access network device and the secondary access network device may be access network devices of different standards. For example, the primary access network device is an NR base station and the secondary base station is a 6G base station; or the primary base station is a 6G base station and the secondary base station is an NR base station. Optionally, the primary access network device and the secondary access network device may also be access network devices of the same standard, for example, both are 6G base stations. This application does not limit the standards of the primary access network device and the secondary access network device.

[0115] It should be understood that FIG1 is only a schematic diagram, and the communication system may also include other devices that are not shown in FIG1 .

[0116] The data link shown in Figure 1 above is a diversion bearer, which means that a bearer uses the air interface of both the primary access network device and the air interface of the secondary access network device for data transmission. The diversion bearer includes a diversion bearer with a data anchor point on the primary access network device and a diversion bearer with a data anchor point on the secondary access network device. In the DC scenario, user plane data needs to be transmitted between the access network device and the terminal device through a wireless data bearer (DRB). Among them, the DRB includes a service data adaptation protocol (SDAP) entity, a PDCP entity, an RLC entity, a MAC entity, and a series of resources allocated by the physical (PHY) layer.

[0117] Figure 2 is a schematic diagram of a DRB provided by an embodiment of the present application. As shown in Figure 2, the type of DRB is a diversion bearer. If a diversion bearer of the DRB is established by the primary access network device (or, a diversion bearer with a data anchor point at the primary access network device), then in the downlink direction, the PDCP layer of the primary access network device diverts the downlink data sent by the core network to the secondary access network device; in the uplink direction, if the uplink supports diversion, the primary and secondary access network devices respectively receive uplink data from the terminal device, and the secondary access network device then sends the received uplink data to the primary access network device. If in-order delivery is required, the primary access network device reorders the uplink data received from the primary and secondary access network devices at the PDCP layer, and then sends the received data to the core network in order.

[0118] It can be understood that, for offloaded bearer, data transmitted on the primary access network device and data transmitted on the secondary access network device may belong to different data of the same type of service.

[0119] In this application, the access network device used to establish the DRB offload bearer can be called the DRB data anchor station or the DRB PDCP anchor station.

[0120] As mentioned previously, regardless of whether the data anchor point is at the primary access network device or the secondary access network device, in the uplink direction, the data anchor station must reorder the uplink data received from the primary and secondary access network devices at the PDCP layer before sending it to the core network in sequence. Therefore, when the data received by the primary and secondary access network devices converge at the PDCP layer of the data anchor station, it is desirable that the PDCP sequence number differences between them are minimal. To ensure that the sequence number differences reaching the PDCP layer from the terminal device are minimal, the PDCP anchor station and non-PDCP anchor stations must receive the terminal device's BSR and perform uplink scheduling based on the terminal device's BSR.

[0121] However, the buffer size included in the BSR sent by the terminal device to the primary access network device includes the size of the data buffered on the terminal device's PDCP and the size of the data distributed from the PDCP to the RLC corresponding to the primary access network device; the buffer size included in the BSR sent by the terminal device to the secondary access network device includes the size of the data buffered on the terminal device's PDCP and the size of the data distributed from the PDCP to the RLC corresponding to the secondary access network device. Since the data buffered on the PDCP will eventually be distributed to the primary and secondary access network devices, the buffer size included in the BSR reported by the terminal device to the primary and secondary access network devices should include the size of the data distributed from the PDCP to the RLC corresponding to the primary access network device and the size of the data buffered on the PDCP that was finally distributed to the RLC corresponding to the primary and secondary access network devices. Among them, the RLC corresponding to the primary access network device can be called the logical channel corresponding to the primary access network device, and the RLC corresponding to the secondary access network device can also be called the logical channel corresponding to the secondary access network device.

[0122] To prevent the primary and secondary base stations from misinterpreting the buffer size included in the BSR reported by the terminal, the current protocol recommends that the terminal device, in offload bearer mode, minimize or eliminate packet splitting to the RLC, ensuring that the buffer size included in the BSR reported by the terminal device is the size of the data buffered on the PDCP. This allows the primary and secondary access network devices to assume that the buffer size included in the BSR is the size of the data buffered on the PDCP when performing uplink scheduling. Non-PDCP anchor stations then perform uplink scheduling according to their committed transmission bit rate, while PDCP anchor stations perform uplink scheduling according to the transmission bit rate obtained by subtracting the transmission bit rate of the non-PDCP anchor station from the total transmission bit rate, thereby achieving efficient data transmission.

[0123] However, in actual communication, in order to speed up data processing, the terminal device will sub-packetize the data cached on the PDCP in advance before receiving the uplink scheduling information. The sub-packetization ratio is determined by the terminal device according to its own algorithm. Because the network side may convert the proportion of scheduling resources based on the quality of service (QoS) before performing uplink scheduling. If the proportion of scheduling resources converted by the network side is inconsistent with the sub-packetization ratio of the terminal device, it may cause one of the primary and secondary access network devices to schedule more resources, which are wasted, and the other access network device to schedule fewer resources and not have time to transmit. As a result, the primary and secondary access network devices cannot achieve efficient resource scheduling, which affects the uplink transmission rate.

[0124] In view of this, an embodiment of the present application provides a communication method, related devices and communication system. In this method, the main and auxiliary access network devices send the diversion ratio negotiated by both ends to the terminal device in advance, so that the terminal device diverts the cached data according to the diversion ratio indicated by the network side, effectively avoiding the problem of low uplink transmission rate caused by the inconsistency between the subpacketization ratio determined by the terminal device and the ratio of scheduling resources determined by the network side.

[0125] It should be understood that the method provided in the embodiment of the present application can be applied to the scenario shown in Figure 1 above, and can also be applied to other scenarios with the above problems. The embodiment of the present application does not limit the applicable scenarios.

[0126] The following describes in detail the communication method provided by an embodiment of the present application in conjunction with Figure 3. The method provided by the present application can be applied to the network architecture shown in Figure 1, but the embodiments of the present application are not limited thereto. This application describes the first access network device as a data anchor station. It should be understood that the first access network device can be a primary access network device or a secondary access network device.

[0127] In the flowchart shown in FIG3 , the method is illustrated from the perspective of the interaction between a terminal device and an access network device, but the present application does not limit the execution subject of the method. For example, the first access network device in FIG3 can be replaced by a chip, chip system, or processor that supports the first access network device to implement the method, or a logic module or software that can implement all or part of the functions of the first access network device; the second access network device in FIG3 can be replaced by a chip, chip system, or processor that supports the second access network device to implement the method, or a logic module or software that can implement all or part of the functions of the second access network device; the terminal device in FIG3 can be replaced by a chip, chip system, or processor that supports the terminal device to implement the method, or a logic module or software that can implement all or part of the functions of the terminal device.

[0128] FIG3 is a schematic flow chart of a communication method 300 provided in an embodiment of the present application. As shown in FIG3 , the method 300 may include steps S301 to S304. Each step in the method 300 is described in detail below.

[0129] Optionally, in S301, a first access network device determines first information, where the first information is used to indicate at least one split ratio of a first RB or to indicate at least one transmission bit rate group of the first RB.

[0130] In a possible implementation, the first access network device is an O-CU or a CU. That is, S301 may be replaced by: the O-CU or the CU determines the first information.

[0131] The first RB is a traffic offload bearer between the first access network device and the second access network device, and the terminal. Alternatively, the first RB is a traffic offload bearer established by the first access network device for the QoS flow of the terminal device. Therefore, the first RB and QoS flow in this application can be equivalently replaced.

[0132] It can be understood that the first information can also be used to indicate at least one split ratio of the second RB or to indicate at least one transmission bit rate group of the second RB.

[0133] Exemplarily, the RB in this application may be a DRB, an SRB or an MRB, etc.

[0134] In a possible implementation manner, the first information is used to indicate at least one traffic split ratio of the first RB.

[0135] Optionally, the number of at least one diversion ratio of the first RB indicated by the first information is one. For example, the first information indicates diversion ratio #1 of the first RB, where diversion ratio #1 is the ratio of any two of the following data amounts: the amount of uplink data of the first RB diverted to the first access network device (for convenience of description, hereinafter referred to as data amount #1), the amount of uplink data of the first RB diverted to the second access network device (for convenience of description, hereinafter referred to as data amount #2), or the amount of uplink data of the first RB (for convenience of description, hereinafter referred to as data amount #3).

[0136] Exemplarily, the diversion ratio #1 can be the ratio of data volume #1 to data volume #2, or the ratio of data volume #2 to data volume #3; the diversion ratio #1 can be the ratio of data volume #1 to data volume #3, or the ratio of data volume #3 to data volume #1; the diversion ratio #1 can be the ratio of data volume #2 to data volume #3, or the ratio of data volume #3 to data volume #2.

[0137] Optionally, the first information indicates a plurality of at least one split ratios of the first RB. For example, the first information indicates split ratio #2 and split ratio #3 of the first RB, where split ratio #2 and split ratio #3 can be ratios of any two of the following data amounts: data amount #1, data amount #2, or data amount #3.

[0138] Exemplarily, the diversion ratio #2 is the ratio of data volume #1 to data volume #2, or the ratio of data volume #2 to data volume #3; the diversion ratio #2 is the ratio of data volume #1 to data volume #3, or the ratio of data volume #3 to data volume #1; the diversion ratio #2 is the ratio of data volume #2 to data volume #3, or the ratio of data volume #3 to data volume #2.

[0139] Exemplarily, diversion ratio #3 is the ratio of data volume #1 to data volume #2, or the ratio of data volume #2 to data volume #3; diversion ratio #3 is the ratio of data volume #1 to data volume #3, or the ratio of data volume #3 to data volume #1; diversion ratio #3 is the ratio of data volume #2 to data volume #3, or the ratio of data volume #3 to data volume #2.

[0140] It is understood that the two data volumes corresponding to split ratio #2 and the two data volumes corresponding to split ratio #3 may be the same or different. For example, the two data volumes corresponding to split ratio #2 and the two data volumes corresponding to split ratio #3 are both data volume 1 and data volume 2; for another example, the two data volumes corresponding to split ratio #2 are data volume #1 and data volume #2, respectively, and the two data volumes corresponding to split ratio #3 are data volume #1 and data volume #3.

[0141] Optionally, the first information may indicate multiple diversion ratios in the form of a diversion ratio list, and the multiple diversion ratios may include an initial diversion ratio and at least one candidate diversion ratio.

[0142] In another possible implementation, the first information is used to indicate at least one transmission bit rate group of the first RB.

[0143] Optionally, the number of at least one transmission bit rate group for the first RB indicated by the first information is one. For example, the first information indicates transmission bit rate group #1 for the first RB, where transmission bit rate group #1 includes at least one of the following transmission bit rates: an uplink transmission bit rate provided by the first access network device for the first RB (hereinafter referred to as transmission bit rate #1 for convenience of description), or an uplink transmission bit rate provided by the second access device for the first RB (hereinafter referred to as transmission bit rate #2 for convenience of description).

[0144] Optionally, the first information indicates a plurality of transmission bit rate groups for the first RB. For example, the first information indicates transmission bit rate group #2 and transmission bit rate group #3 for the first RB, where transmission bit rate group #2 and transmission bit rate group #3 each include at least one of the following transmission bit rates: transmission bit rate #1 or transmission bit rate #2.

[0145] It is understood that the transmission bit rates included in transmission bit rate group #2 and the transmission bit rates included in transmission bit rate group #3 may be the same or different. For example, the transmission bit rates included in transmission bit rate group #2 and the transmission bit rates included in transmission bit rate group #3 may both be transmission bit rate #1 and transmission bit rate #2. For another example, the transmission bit rate included in transmission bit rate group #2 may be transmission bit rate #1, and the transmission bit rate included in transmission bit rate group #3 may be transmission bit rate #2.

[0146] Similar to the multiple split ratios, the first information may indicate multiple transmission ratio rate groups in the form of a transmission ratio rate list. The multiple transmission bit rate groups may include an initial transmission bit rate group and at least one candidate transmission bit rate group.

[0147] Optionally, in S302, the first access network device sends first information to the terminal device. Correspondingly, the terminal device receives the first information from the first access network device.

[0148] In conjunction with the example where the first access network device is an O-CU or CU, when the first access network device is the O-CU or CU, the first access network device sending the first information to the terminal may include: the O-CU or CU sending the first information to the O-DU or DU through a first interface; and after receiving the first information, the O-DU or DU sending the first information to the terminal device through the RU. The first interface is the interface between the O-CU (or CU) and the O-DU (or DU).

[0149] In the embodiments of the present application, the first access network device sending information or a message (e.g., the first information) to the terminal device can be understood as the first access network device sending the information or message to the terminal device via one or more network elements. For example, the first access network device is a CU, and the CU sends the first information to the terminal device via a DU and a RU.

[0150] Similarly, when a terminal device receives information or a message (e.g., a first message) from a first access network device, it can be understood that the terminal device receives the information or message from the first access network device via one or more network elements. For example, the first access network device is a CU, and the terminal device receives the first message from the CU via the RU and DU.

[0151] The first information may be carried in RRC signaling.

[0152] Optionally, the first access network device may directly send the first information to the terminal device. Alternatively, the first access network device may send the first information to the terminal device via an air interface of the first access network device.

[0153] Exemplarily, when the first access network device is the primary access network device, the first access network device may directly send the first information to the terminal device.

[0154] Optionally, when the first access network device is the primary access network device, the method 300 further includes: the first access network device sending information indicating at least one split ratio of the first RB to the second access network device.

[0155] Exemplarily, the first access network device is a secondary access network device, and after the terminal device accesses the first access network device, the first access network device can directly send the first information to the terminal device.

[0156] Optionally, the first access network device sends the first information to the terminal device through the second access network device. Alternatively, the first access network device sends the first information to the terminal through the air interface of the second access network device.

[0157] Exemplarily, the first access network device is a secondary access network device, and before the terminal device accesses the first access network device, the first access network device sends the first information to the terminal device through the second access network device.

[0158] S303: The terminal device determines a first split ratio or a first transmission bit rate group.

[0159] The first split ratio belongs to at least one split ratio of the first RB; and the first transmission bit rate group belongs to at least one transmission bit rate group of the first RB.

[0160] In a possible implementation, when the first information indicates at least one transmission bit rate group of the first RB, S303 may be replaced by: the terminal device determines the first transmission bit rate group.

[0161] With reference to the description in S301, when the first information indicates a transmission bit rate group for the first RB, the first transmission bit rate group is transmission bit rate group #1. When the first information indicates multiple transmission bit rate groups for the first RB, the first transmission bit rate group may be any one of the multiple transmission bit rate groups. For example, the first transmission bit rate group may be transmission bit rate group #2 or transmission bit rate group #3.

[0162] Optionally, the first transmission bit rate group is the first transmission bit rate group in at least one transmission bit rate group of the first RB.

[0163] Exemplarily, when the first information indicates at least one transmission bit rate group of the first RB in the form of a transmission bit rate list, the first transmission bit rate group may be a transmission bit rate group located in the first row or first column of the transmission bit rate list.

[0164] Optionally, the terminal device determines the first transmission bit rate group based on the second information.

[0165] The second information is used to indicate a first transmission bit rate group for the first RB. The first transmission bit rate group may be indicated to the terminal device by the first access device or the second access network device.

[0166] In another possible implementation, when the first information indicates at least one split ratio of the first RB, S303 may be replaced by: the terminal device determines the first split ratio.

[0167] In conjunction with the description in S301, when the first information indicates a split ratio for the first RB, the first split ratio may be split ratio #1; when the first information indicates multiple split ratios for the first RB, the first split ratio may be any one of the multiple split ratios. For example, the first split ratio may be split ratio #2 or split ratio #3.

[0168] Optionally, the first split ratio is a first split ratio among at least one split ratio of the first RB.

[0169] Exemplarily, when the first information indicates at least one diversion ratio in the form of a diversion ratio list, the first diversion ratio may be a diversion ratio located in the first row or the first column of the diversion ratio list.

[0170] Optionally, the terminal device determines the first diversion ratio according to the second information.

[0171] The second information is used to indicate a first traffic split ratio, which may be indicated by the first access device or the second access network device to the terminal device.

[0172] S304: The terminal device transmits uplink data of the first RB according to the first split ratio or the first transmission bit rate group.

[0173] S304 is related to S303. If, in S303, the terminal device determines a first split ratio, then in S304, the terminal device transmits the uplink data of the first RB according to the first split ratio. If, in S303, the terminal device determines a first transmission bit rate group, then in S304, the terminal device transmits the uplink data of the first RB according to the first transmission bit rate group.

[0174] In one possible implementation, the terminal device transmitting uplink data of a first RB according to a first split ratio may include: the terminal device splitting the uplink data of the first RB according to the first split ratio to determine first data and second data; and the terminal device transmitting the first data to a first access network device and transmitting the second data to a second access network device. The first data corresponds to the first access network device, and the second data corresponds to the second access network device.

[0175] It can be understood that the traffic splitting in this application is performed by the PDCP entity of the first RB on the terminal device, that is, the PDCP entity of the first RB on the terminal device splits the uplink data of the first RB according to the first traffic splitting ratio.

[0176] It can also be understood that the data volume of the above-mentioned first data is the data volume #1 described above, the data volume of the second data is the data volume #2 described above, and the data volume of the first data and the data volume of the second data are the data volume #3 described above.

[0177] Another possible implementation is that the terminal device transmits the uplink data of the first RB according to the first transmission bit rate group, which may include: the terminal device determines the transmission bit rate #1 and the transmission bit rate #2 according to the transmission bit rates included in the first transmission bit rate group; the terminal device transmits the uplink data of the first RB according to the transmission bit rate #1 and the transmission bit rate #2.

[0178] Exemplarily, the terminal device transmitting uplink data of a first RB according to transmission bit rate #1 and transmission bit rate #2 may include: the terminal device determining a first split ratio according to transmission bit rate #1 and transmission bit rate #2; and transmitting the uplink data of the first RB according to the first split ratio. For example, the terminal device uses the ratio of transmission bit rate #1 to transmission bit rate #2 as the first split ratio.

[0179] It should be noted that if any transmission bit rate group includes only one of transmission bit rate #1 and transmission bit rate #2, the terminal device may determine the other transmission bit rate based on the transmission bit rate included in the transmission bit rate group and the total transmission bit rate of the first RB. The total transmission bit rate of the RB may be determined by the terminal device based on the transmission bit rate of the QoS flow from the core network and the mapping relationship between the QoS flow and the RB from the access network device.

[0180] In an embodiment of the present application, the first access network device indicates at least one diversion ratio of the first RB to the terminal device through the first information, so that the terminal device can determine the first diversion ratio for diverting uplink data of the first RB from the at least one diversion ratio. Since the at least one diversion ratio is indicated to the terminal device through negotiation on the network side, the method of the present application can ensure that the diversion ratio used by the network side is consistent with the diversion ratio used by the terminal device, which is beneficial for the first and second access network devices to achieve efficient resource scheduling and improve uplink transmission efficiency.

[0181] Optionally, the method 300 further includes: the first access network device or the second access network device determining second information from the terminal device; and sending the second information to the terminal device. Correspondingly, the terminal device receives the second information.

[0182] The second information and the first information may be sent together or separately.

[0183] Example 1: The second information and the first information are carried in the same RRC signaling.

[0184] The second information is sent in the same manner as the first information: the first access network device can directly send the second information to the terminal device, or the first access network device can send the second information to the terminal device via the second access network device. For a more detailed description, please refer to the description in S302 above, which will not be repeated here.

[0185] Exemplarily, when the second information is carried in the same RRC signaling, the first access network device or the second access network device is an O-CU or a CU, that is, the O-CU or the CU determines the second information.

[0186] When the first access network device or the second access network device is an O-CU or a CU, the first access network device or the second access network device sending the second information to the terminal may include: the O-CU or the CU sending the second information to the O-DU or the DU through a first interface; after receiving the second information, the O-DU or the DU sending the second information to the terminal device through the RU. The first interface is the interface between the O-CU (or CU) and the O-DU (or DU).

[0187] Example 2: The first information is carried in RRC signaling, and the second information is carried in MAC layer signaling (eg, MAC CE), physical layer signaling (eg, DCI) or PDCP PDU.

[0188] The first information and the second information may be sent to the terminal device by the same or different access network devices.

[0189] Optionally, the second information includes an indication of the first RB and an indication of the first split ratio.

[0190] The first RB may be indicated by an identifier of the first RB, and the first split ratio may be indicated by an index corresponding to the first split ratio, or a position of the first split ratio in at least one split ratio.

[0191] Exemplarily, when the second information is carried in MAC layer signaling (e.g., MAC CE), physical layer signaling (e.g., DCI) or PDCP PDU, the first access network device or the second access network device is an O-DU or DU.

[0192] When the first access network device is an O-DU or a DU, the first access network device or the second access network device sending the second information to the terminal may include: the O-DU or the DU sending the second information to the terminal device through the RU. Optionally, the O-DU or the DU sends the second information to the O-CU or the CU through the first interface, where the first interface is the interface between the O-CU (or CU) and the O-DU (or DU).

[0193] Optionally, in an embodiment of the present application, the access network device may not send the first information to the terminal device, but may directly indicate the first offload ratio or the first transmission bit rate group to the terminal device through second information carried in MAC layer signaling, physical layer signaling, or PDCP PDU. The second information includes an indication of the first RB and the first offload ratio.

[0194] Optionally, at least one split ratio of the first RB (or at least one transmission bit rate group indicated for the first RB) corresponds to at least one duration and / or at least one data amount.

[0195] The following uses the split ratio as an example to describe the relationship between the split ratio and the duration and / or data volume. It should be understood that the split ratio shown below can be replaced by a transmission bit rate group.

[0196] The duration #1 in at least one duration refers to the diversion ratio of the terminal device within the duration #1 using the duration #1 as a unit. In other words, when the terminal device diverts the uplink data of the first RB, it must ensure that the diversion ratio within any duration #1 satisfies the diversion ratio corresponding to the duration #1.

[0197] Data amount #4 in the at least one data amount refers to the diversion ratio corresponding to data amount #4 used by the terminal device in units of data amount #4. In other words, when the terminal device diverts the uplink data of the first RB, it must ensure that the diversion ratio of the data in each data amount #4 satisfies the diversion ratio corresponding to data amount #4. The above-mentioned data amount #4 can be the data size or the number of data packets.

[0198] In one possible implementation, at least one split ratio of the first RB corresponds to at least one duration and at least one data amount. The number of the at least one split ratio and the number of the at least one duration may be the same or different, the number of the at least one split ratio and the number of the at least one data amount may be the same or different, and the number of the at least one duration and the number of the at least one data amount may also be the same or different.

[0199] Exemplarily, each diversion ratio in at least one diversion ratio corresponds to at least one duration and at least one data volume; or, when there are N (N is an integer greater than 1) at least one diversion ratio, and the N diversion ratios can be divided into multiple groups (each group includes multiple diversion ratios), then each group of diversion ratios can correspond to a duration and a data volume; or, some of the N diversion ratios correspond to at least one time period, and the remaining diversion ratios correspond to at least one data volume.

[0200] In one possible implementation, at least one split ratio of the first RB corresponds to at least one duration or at least one data amount. The number of the at least one split ratio and the number of the at least one duration (or at least one data amount) may be the same or different.

[0201] Exemplarily, each diversion ratio in at least one diversion ratio corresponds to at least one duration or at least one data volume; or, when there are N diversion ratios in at least one diversion ratio, and the N diversion ratios can be divided into multiple groups (each group includes multiple diversion ratios), then each group of diversion ratios can correspond to at least one duration or at least one data volume.

[0202] Optionally, the method 300 further includes: the first access network device or the second access network device sending fourth information to the terminal device, where the fourth information is used to indicate a correspondence between at least one split ratio of the first RB and at least one duration and / or at least one data volume. Correspondingly, the terminal device receives the fourth information.

[0203] The fourth information may be sent simultaneously with the first information (for example, carried in the same RRC signaling as the first information) or sent separately.

[0204] Optionally, the method 300 further includes: the terminal device determining a first duration and / or a first data volume corresponding to the first diversion ratio.

[0205] Exemplarily, the terminal device may determine the first duration and / or data volume based on the determined first diversion ratio and the correspondence between the diversion ratio indicated by the fourth information and the duration and / or data volume.

[0206] Alternatively, the terminal device determines the first duration and / or the first data volume based on the fifth information. The fifth information is used to indicate a corresponding relationship between the first offload ratio and the first duration and / or the first data volume. The fifth information may be sent by the access network device to the terminal device.

[0207] Exemplarily, the fifth information may be carried in MAC layer signaling (e.g., MAC CE), physical layer signaling (e.g., DCI), or PDCP PDU. Therefore, if the access network device sends the second information to the terminal device, the fifth information may be sent simultaneously with the second information or separately.

[0208] Optionally, before the terminal device transmits the first data to the first access network device, the method 300 further includes: the terminal device determining first buffer information based on the first data; and sending a first BSR to the first access network device, the first BSR including the first buffer information. Accordingly, the first access network device receives the first BSR and performs uplink scheduling based on the first BSR.

[0209] Optionally, before sending the first BSR to the first access network device, the method 300 also includes: the terminal device cancels the BSR triggered before sending the first BSR but not sent to the first access network device, and the cache information included in the BSR is calculated based on the uplink data of the first RB, and is not determined based on the diversion ratio indicated by the first information.

[0210] Optionally, before the terminal device transmits the second data to the second access network device, the method 300 further includes: the terminal device determining second buffer information based on the second data; and sending a second BSR to the second access network device, the second BSR including the second buffer information. Accordingly, the second access network device receives the second BSR and performs uplink scheduling based on the second BSR.

[0211] Optionally, before sending the second BSR to the second access network device, the method 300 also includes: the terminal device cancels the BSR triggered before sending the second BSR but not sent to the second access network device, and the cache information included in the BSR is calculated based on the uplink data of the first RB, rather than determined based on the diversion ratio indicated by the first information.

[0212] It should be noted that at least one diversion ratio of the first RB or at least one transmission bit rate group of the first RB in this application can be determined by the access network device for the first time and sent to the terminal device, or it can be determined and sent to the terminal device by the access network device when the air interface resources of the access network device change.

[0213] In one possible implementation, the first information is sent by the primary access network device to the terminal device via an RRC reconfiguration message before the terminal device accesses the secondary access network device.

[0214] It can be understood that when the primary access network device is not the first access network device, the first access network device is also required to send the first information to the primary access network device before the primary access network device sends the RRC reconfiguration message to the terminal device.

[0215] In another possible implementation, after the terminal device determines the traffic split ratio, and when the transmission bit rate on the first access network device or the second access network device changes, the first access network device or the second access network device sends the first information to the terminal device via an RRC reconfiguration message. In other words, the first information is used to update the most recently determined traffic split ratio.

[0216] Optionally, the method 300 also includes: the first access network device receives third information from the second access network device, and the third information is used to update the diversion ratio; at this time, the first access network device determines the first information, including: the first access network device determines the first information based on the third information.

[0217] Exemplarily, the third information may include the uplink transmission bit rate currently provided by the second access network device for the first RB, and / or include the uplink transmission bit rate predicted by the second access network device to be provided for the first RB.

[0218] Optionally, when the third information includes the uplink transmission bit rate provided by the second access network device for the first RB, the third information may further include a predicted duration corresponding to the uplink transmission bit rate. The predicted duration corresponding to the uplink transmission bit rate means that the second access network device can use the uplink transmission bit rate to transmit uplink data within the predicted duration.

[0219] Similar to the first information, the second information may be sent by the first access network device or the second access network device to the terminal device before the terminal determines the first diversion ratio. Alternatively, the second information may be sent by the first access network device or the second access network device to the terminal device after the terminal determines the diversion ratio (for example, the determined diversion ratio is diversion ratio #1) to update the most recently determined diversion ratio (for example, updating diversion ratio #1 to diversion ratio #3).

[0220] Optionally, the method 300 also includes: the first access network device receives third information from the second access network device, and the third information is used to update the diversion ratio; at this time, the first access network device determines the second information, including: the first access network device determines the second information based on the third information.

[0221] For a more detailed description of the third information, please refer to the relevant description above and will not be repeated here.

[0222] Optionally, the method 300 further includes: the second access network device sending a first message to the first access network device, the first message being used to determine the first information. Correspondingly, the first access network device receives the first message from the second access network device.

[0223] Exemplarily, the first message includes the uplink transmission bit rate provided by the second access network device for the first RB. In other words, the first message indicates the QoS guarantee that the second access network device can provide for the QoS flow of the terminal device. This QoS guarantee is essentially a QoS parameter that indicates the QoS requirements that the second access network device can guarantee for the QoS flow if it participates in the transmission of the QoS flow of the terminal device. This QoS parameter includes the uplink transmission bit rate.

[0224] Exemplarily, the first message includes the traffic diversion ratio that the second access network device expects to use.

[0225] It can be understood that the uplink transmission bit rate or the number of split ratios expected to be used included in the first message can be one or more.

[0226] Optionally, the method 300 further includes: the second access network device sending the uplink transmission bit rate provided by the second access network device for the first RB to the terminal device to assist the terminal device in making a diversion decision.

[0227] A possible scenario: the first access network device is a secondary access network device, and the second access network device is a primary access network device.

[0228] Optionally, after the first access network device receives the first message from the second access network device, the method 300 further includes: the first access network device sending a second message to the second access network device, where the second message includes an uplink transmission bit rate that the second access network device needs to provide for the first RB. Correspondingly, the second access network device receives the second message from the first access network device.

[0229] The second message is a response message to the first message, and the first message is used to request that the SDAP or PDCP of the QoS flow of the terminal device be established on the first access network device.

[0230] Optionally, before the first access device sends the second message to the second access network device, the method 300 further includes: the first access device establishing a first RB for the QoS flow of the terminal device, and carrying the first RB in the second message. That is, the second message may also include the first RB.

[0231] Another possible scenario: the first access network device is a primary access network device, and the second access network device is a secondary access network device.

[0232] Optionally, before the first access network device receives the first message from the second access network device, the method 300 also includes: the first access network device sends a second message to the second access network device, where the second message is used to request the uplink transmission bit rate provided by the second access network device for the first RB.

[0233] The first message is a response message to the second message.

[0234] Optionally, the second message is also used to instruct the first access network device to establish an RLC bearer for the first RB.

[0235] The following will be based on the embodiment shown in Figure 3, and will introduce the communication method provided in this application in more detail in combination with Figures 4 and 5. In the communication method shown in Figures 4 and 5, the base station is used as an example of an access network device for illustration. More specifically, in Figure 4, the main base station is used as an example of the second access network device, and the auxiliary base station is used as an example of the first access network device; in Figure 5, the main base station is used as an example of the first access network device, and the auxiliary base station is used as an example of the second access network device. And in the communication method shown in Figures 4 and 5, the first DRB is used as an example of the first RB, and the first information indicates at least one diversion ratio of the first DRB for illustration.

[0236] It should be noted that, in the embodiments shown in FIG. 4 and FIG. 5 , the same or similar steps as those in the embodiment shown in FIG. 3 can be found in the above description of the method 300 and will not be described in detail.

[0237] The following takes the offload bearing of the data anchor point in the secondary base station as an example and describes in detail the method provided in the embodiment of the present application in combination with FIG4 .

[0238] FIG4 is another schematic flow chart of a communication method 400 provided in an embodiment of the present application. As shown in FIG4 , the method 400 includes steps S401 to S416. Each step of the method 400 is described in detail below.

[0239] S401, the terminal device is connected to the main base station.

[0240] S402: The primary base station decides to add a secondary base station for the terminal device.

[0241] Exemplarily, when the primary base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S402 may be replaced by: CU#2 (or O-CU#2) decides to add a secondary base station for the terminal.

[0242] S403: The primary base station sends a first request message to the secondary base station, where the first request message is used to request that the SDAP or PDCP of the QoS flow of the terminal device be established in the secondary base station. Correspondingly, the secondary base station receives the first request message.

[0243] Optionally, the first request message is further used to indicate the QoS guarantee that the primary base station can provide for the QoS flow. The QoS guarantee can be a QoS parameter, and the QoS parameter includes an uplink transmission bit rate. Alternatively, the first request message is further used to indicate the uplink transmission bit rate that the primary base station can provide for the QoS flow.

[0244] The first request message can be understood as the first message in the above method 300.

[0245] Similar to the main base station, the secondary base station is split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1). Combined with the example of the main base station being split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S403 can be replaced with: CU#2 (or O-CU#2) sends a first request message to DU#2 (or O-DU#2), DU#2 (or O-DU#2) sends a first request message to DU#1 (or O-DU#1), and DU#1 (or O-DU#1) sends a first request message to CU#1 (or O-CU#1).

[0246] It can be understood that DU#2 (or O-DU#2) can send the first request message to DU#1 (or O-DU#1) through the RU; similarly, DU#1 (or O-DU#1) receives the first request message from DU#2 (or O-DU#2) through the RU. The RUs here include RU#2 corresponding to DU#2 (or O-DU#2) and RU#1 corresponding to DU#1 (or O-DU#1).

[0247] S404: The secondary base station establishes a first DRB for the QoS flow of the terminal device and determines at least one offload ratio of the first DRB. The first DRB is an offload bearer of the data anchor point of the terminal device in the secondary base station.

[0248] In combination with the example of the auxiliary base station being split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1), S404 can be replaced with: CU#1 (or O-CU#1) establishes a first DRB for the QoS flow of the terminal device and determines at least one diversion ratio of the first DRB.

[0249] For the description of at least one diversion ratio of the first DRB, please refer to the relevant description in the previous method 300 and will not be repeated here.

[0250] S405: The secondary base station sends a first response message to the primary base station. Correspondingly, the primary base station receives the first response message.

[0251] In conjunction with the example where the secondary base station is split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1) and the primary base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S405 can be replaced with: CU#1 (or O-CU#1) sends a first response message to DU#1 (or O-DU#1), DU#1 (or O-DU#1) sends a first response message to DU#2 (or O-DU#2), and DU#2 (or O-DU#2) sends a first response message to CU#2 (or O-CU#2).

[0252] The first response message includes the first DRB and the QoS guarantee that the primary base station needs to provide for the first DRB. For the description of QoS guarantee, please refer to the description in S403 above, which will not be repeated here.

[0253] The first response message can be understood as the second message in the above method 300.

[0254] Optionally, the first response message may also include at least one diversion ratio of the first DRB.

[0255] It should be understood that there is a one-to-one correspondence between the at least one traffic splitting ratio and the QoS parameter (ie, the uplink transmission bit rate).

[0256] S406: The primary base station sends an RRC reconfiguration message to the terminal device. Correspondingly, the terminal receives the RRC reconfiguration message.

[0257] The RRC reconfiguration message includes at least one offload ratio of the first DRB determined by the secondary base station, and the configuration of the RLC bearer established by the primary base station on the primary base station for the first DRB.

[0258] In combination with the example where the main base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S406 can be replaced with: CU#2 (or O-CU#2) sends an RRC reconfiguration message to DU#2 (or O-DU#2); DU#2 (or O-DU#2) sends an RRC reconfiguration message to the terminal device.

[0259] It is understood that DU#2 (or O-DU#2) can send an RRC reconfiguration message to the terminal device via RU#2; similarly, the terminal device receives a message from DU#2 (or O-DU#2) via RU#2. RU#2 corresponds to DU#2 (or O-DU#2).

[0260] S407: The terminal device determines a first diversion ratio.

[0261] This process can refer to the description of determining the first diversion ratio in S303 above, which will not be repeated here.

[0262] S408, the terminal device diverts the uplink data of the first DRB according to the first diversion ratio to determine data #1 and data #2.

[0263] The data #1 corresponds to the secondary base station, and the data #2 corresponds to the primary base station. The data #1 can be understood as the first data in the method 300, and the data #2 can be understood as the second data in the method 300.

[0264] S409, the terminal device sends BSR#1 to the main base station, where BSR#1 is related to data #2.

[0265] The fact that BSR#1 is associated with data#2 means that the buffer information included in BSR#1 is determined by the terminal device based on data#2.

[0266] Optionally, the terminal device needs to cancel the triggered but unsent BSR before sending BSR#1.

[0267] Optionally, the method 400 further includes: S410, the terminal device sends a BSR#2 to the secondary base station, where the BSR#2 is related to the data #1.

[0268] The BSR#2 is related to the data#1, which means that the cache information included in the BSR#2 is determined by the terminal device based on the data#1.

[0269] The above BSR#1 can be understood as the second BSR in method 300, and BSR#2 can be understood as the first BSR in method 300. Therefore, for the description of BSR#1 and BSR#2, reference can be made to the above related description, which will not be repeated here.

[0270] Optionally, when the air interface resources of the primary base station change, the following S411 to S416 may continue to be executed.

[0271] S411: The primary base station sends flow control information to the secondary base station. Correspondingly, the secondary base station receives the flow control information.

[0272] The flow control information includes the uplink transmission bit rate currently provided by the primary base station for the first DRB, and / or the uplink transmission bit rate that the primary base station predicts can be provided for the first DRB.

[0273] Optionally, the flow control information also includes the predicted effective duration.

[0274] The flow control information can be understood as the fourth information in method 300. Therefore, for a more detailed description of the flow control information, please refer to the description of the fourth information above, which will not be repeated here.

[0275] In conjunction with the example where the primary base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S411 can be replaced with: DU#2 (or O-DU#2) sends flow control information to the terminal device. Optionally, DU#2 (or O-DU#2) sends flow control information to CU#2 (or O-CU#2).

[0276] It can be understood that DU#2 (or O-DU#2) can send flow control information to the terminal device through RU#2.

[0277] S412: The secondary base station sends the updated traffic split ratio to the primary base station. Correspondingly, the primary base station receives the updated traffic split ratio.

[0278] In conjunction with the example where the secondary base station is split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1) and the primary base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2), S412 can be replaced with: DU#1 (or O-DU#1) sends the split ratio to DU#2 (or O-DU#2); DU#2 (or O-DU#2) sends the split ratio to CU#2 (or O-CU#2). Optionally, DU#1 (or O-DU#1) sends the split ratio to CU#1 (or O-CU#1).

[0279] It is understood that DU#1 (or O-DU#1) can send the split ratio to DU#2 (or O-DU#2) via RU. For the description of RU, please refer to the description in S403 and will not be repeated here.

[0280] Exemplarily, the secondary base station sends the second traffic splitting ratio to the primary base station.

[0281] Optionally, the primary base station sends confirmation information to the secondary base station.

[0282] Optionally, S412 may be replaced by: the primary base station sends the updated split ratio to the secondary base station; correspondingly, the secondary base station receives the updated split ratio and replies a rejection or confirmation to the primary base station.

[0283] S413: The secondary base station sends the updated traffic split ratio to the terminal device. Correspondingly, the terminal device receives the updated traffic split ratio.

[0284] In combination with the example where the secondary base station is split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1), S413 may be replaced by: DU#1 (or O-DU#1) sends the updated split ratio to the terminal device.

[0285] S414, the terminal device diverts the uplink data of the first DRB according to the updated diversion ratio, and determines data #3 and data #4.

[0286] Among them, data #3 corresponds to the secondary base station, and data #4 corresponds to the primary base station. The data #3 can be understood as the first data mentioned above, and the data #4 can be understood as the second data mentioned above.

[0287] S415, the terminal device sends BSR#3 to the main base station, and the BSR#3 is related to data #4.

[0288] The fact that BSR#3 is associated with data #4 means that the buffer information included in BSR#3 is determined by the terminal device based on data #4.

[0289] Optionally, the method 400 further includes: S416, the terminal device sends a BSR#4 to the secondary base station, where the BSR#4 is related to the data #3.

[0290] The fact that BSR#4 is related to data#3 means that the buffer information included in BSR#1 is determined by the terminal device based on data#3.

[0291] The above BSR#3 can be understood as the second BSR in method 300, and BSR#4 can be understood as the first BSR in method 300. Therefore, for the description of BSR#3 and BSR#4, please refer to the relevant description above and will not be repeated here.

[0292] In an embodiment of the present application, the auxiliary base station sends at least one diversion ratio of the first DRB to the terminal device through the main base station, so that the terminal device can determine the first diversion ratio for diverting the first DRB from the at least one diversion ratio of the first DRB. Since the at least one diversion ratio sent by the base station to the terminal device is determined by negotiation on the base station side, and when the air interface resources on the base station side change, the base station side can also promptly indicate the updated diversion ratio to the terminal device. Therefore, the method provided in the embodiment of the present application can achieve efficient resource scheduling between the terminal device and the main and auxiliary access network devices, thereby improving the uplink transmission efficiency.

[0293] The following takes the offload bearing of the data anchor point at the primary base station as an example, and describes in detail the method provided in the embodiment of the present application in combination with Figure 5.

[0294] FIG5 is another schematic flow chart of a communication method 500 provided in an embodiment of the present application. As shown in FIG5 , the method 500 includes steps S501 to S517. Each step of the method 500 is described in detail below.

[0295] S501, the terminal device is connected to the main base station.

[0296] S502: The primary base station decides to add a secondary base station for the terminal device and establishes a first DRB for the QoS flow of the terminal device. The first DRB is the offload bearer of the data anchor point of the terminal device in the primary base station.

[0297] S503: The primary base station sends a second request message to the secondary base station, where the second request message includes the QoS parameters of the first DRB. Correspondingly, the secondary base station receives the second request message.

[0298] The QoS parameter is the QoS guarantee that the primary base station requests the secondary base station to provide for the first DRB. For a description of the QoS guarantee, please refer to the relevant description in S402 above, which will not be repeated here.

[0299] Optionally, the second request message further instructs the secondary base station to establish an RLC bearer for the first DRB.

[0300] The second request message can be understood as the second message in the above method 300.

[0301] S504: The secondary base station sends a second response message to the primary base station, where the second response message includes the QoS guarantee provided by the secondary base station for the first DRB. Correspondingly, the primary base station receives the second response message.

[0302] For the description of QoS guarantee, please refer to the relevant description in S402 above, which will not be repeated here.

[0303] The second response message may be understood as the first message of the above method 300.

[0304] S505: The primary base station determines at least one offload ratio of the first DRB according to the second response message.

[0305] S506: The primary base station sends at least one traffic splitting ratio of the first DRB to the secondary base station. Correspondingly, the secondary base station receives the at least one traffic splitting ratio of the first DRB.

[0306] For the description of at least one diversion ratio, reference may be made to the related description in S301 above, which will not be repeated here.

[0307] S507: The primary base station sends an RRC reconfiguration message to the terminal device. Correspondingly, the terminal device receives the RRC reconfiguration message.

[0308] The RRC reconfiguration message includes at least one split ratio of the first DRB. The RRC reconfiguration message can be understood as the first information in the above method 300.

[0309] S508: The terminal device determines a first diversion ratio.

[0310] S509: The terminal device diverts the uplink data of the first DRB according to the first diversion ratio to determine data #1 and data #2.

[0311] The data #1 corresponds to the primary base station, and the data #2 corresponds to the secondary base station. The data #1 can be understood as the first data in the method 300, and the data #2 can be understood as the second data in the method 300.

[0312] S510, the terminal device sends BSR#1 to the main base station, where the BSR#1 is related to data #1.

[0313] The BSR#1 is associated with data#1, which means that the cache information included in the BSR#1 is determined by the terminal device based on data#1.

[0314] Optionally, the terminal device needs to cancel the triggered but unsent BSR before sending BSR#1.

[0315] Optionally, the method 500 further includes: S511, the terminal device sends a BSR#2 to the secondary base station, where the BSR#2 is related to the data #2.

[0316] The BSR#2 is related to the data#2, which means that the buffer information included in the BSR#2 is determined by the terminal device based on the data#2.

[0317] BSR#1 can be understood as the first BSR in method 300, and BSR#2 can be understood as the second BSR in the above method 300. Therefore, for the description of BSR#1 and BSR#2, please refer to the above related description and will not be repeated here.

[0318] Optionally, when the air interface resources of the secondary base station change, the following S512 to S517 may continue to be executed.

[0319] S512: The secondary base station sends flow control information to the primary base station. Correspondingly, the primary base station receives the flow control information from the secondary base station.

[0320] The flow control information includes the uplink transmission bit rate currently provided by the secondary base station for the first DRB, and / or the uplink transmission bit rate that the secondary base station predicts can be provided for the first DRB.

[0321] S513: The primary base station sends the updated traffic split ratio to the secondary base station. Correspondingly, the secondary base station receives the updated traffic split ratio.

[0322] Optionally, the secondary base station sends confirmation information to the primary base station.

[0323] Optionally, S513 may be replaced by: the secondary base station sends the updated split ratio to the primary base station; correspondingly, the primary base station receives the updated split ratio and replies a rejection or confirmation to the secondary base station.

[0324] S514: The primary base station sends the updated traffic diversion ratio to the terminal device. Correspondingly, the terminal device receives the updated traffic diversion ratio.

[0325] S515, the terminal device diverts the uplink data of the first DRB according to the updated diversion ratio, and determines data #3 and data #4.

[0326] The data #3 corresponds to the primary base station, and the data #4 corresponds to the secondary base station. The data #3 can be understood as the first data in the method 300, and the data #4 can be understood as the second data in the method 300.

[0327] S516, the terminal device sends BSR#3 to the main base station, and the BSR#3 is related to data #3.

[0328] Optionally, the method 500 further includes: S517, the terminal device sends a BSR#4 to the secondary base station, where the BSR#4 is related to data #4.

[0329] The above BSR#3 can be understood as the first BSR in method 300, and BSR#4 can be understood as the second BSR in method 300. Therefore, for the description of BSR#3 and BSR#4, please refer to the relevant description above and will not be repeated here.

[0330] The above S508 to S517 may refer to the description of S407 to S416 in method 400 and will not be repeated here.

[0331] For example, when the main base station is split into CU#2 (or O-CU#2)-DU#2 (or O-DU#2) and the secondary base station is split into CU#1 (or O-CU#1)-DU#1 (or O-DU#1), for a more detailed description of S502 to S517, please refer to the description in the previous method 400 and will not be repeated here.

[0332] In an embodiment of the present application, the auxiliary base station sends at least one diversion ratio of the first DRB to the terminal device through the main base station, so that the terminal device can determine the first diversion ratio for diverting the first DRB from the at least one diversion ratio of the first DRB. Since the at least one diversion ratio sent by the base station to the terminal device is determined by negotiation on the base station side, and when the air interface resources on the base station side change, the base station side can also promptly indicate the updated diversion ratio to the terminal device. Therefore, the method provided in the embodiment of the present application can achieve efficient resource scheduling between the terminal device and the main and auxiliary access network devices, thereby improving the uplink transmission efficiency.

[0333] It is understood that the embodiments shown in Figures 3 to 5 above can be implemented independently. When the embodiments shown in Figures 3 to 5 are implemented independently, more or fewer steps than those shown in Figures 4 and 5 can be performed. In other words, the steps shown in the above embodiments can be performed in full or in part, and this application does not limit this.

[0334] The method provided by the embodiment of the present application is described in detail above in conjunction with Figures 3 to 5 , and the device provided by the embodiment of the present application is described in detail below in conjunction with Figures 6 to 9 .

[0335] Figures 6 and 7 are schematic diagrams of possible devices provided by embodiments of the present application. These devices can be used to implement the functions of the terminal device, the first access network device, or the second access network device in the above method embodiments, thereby also achieving the beneficial effects of the above method embodiments.

[0336] FIG6 is a schematic block diagram of an apparatus according to an embodiment of the present application. As shown in FIG6 , the apparatus 600 includes a transceiver module 610 and a processing module 620 .

[0337] One possible design is that the apparatus 600 is used to implement the functions of the terminal device in the method embodiments shown in FIG. 3 to FIG. 5 .

[0338] Exemplarily, the transceiver module 610 is used to receive first information, which is used to indicate at least one diversion ratio of the first wireless bearer RB; the processing module 620 is used to: determine a first diversion ratio, which belongs to the at least one diversion ratio; the transceiver module 610 is also used to: transmit the uplink data of the first RB according to the first diversion ratio.

[0339] Optionally, the processing module 620 is specifically configured to: determine the first diversion ratio according to second information, where the second information is used to indicate the first diversion ratio.

[0340] Optionally, the processing module 620 is also used to: divert the uplink data of the first RB according to the first diversion ratio, determine the first data and the second data, the first data corresponds to the first access network device, and the second data corresponds to the second access network device; the transceiver module 610 is also used to: transmit the first data to the first access network device; and transmit the second data to the second access network device.

[0341] Optionally, the processing module 620 is further used to: determine first cache information based on the first data; the transceiver module 610 is further used to: send a first cache status report BSR to the first access network device, where the first BSR includes the first cache information.

[0342] Optionally, the processing module 620 is further configured to cancel a BSR that is triggered before sending the first BSR but not sent to the first access network device.

[0343] Optionally, the processing module 620 is further used to: determine second cache information based on the second data; the transceiver module 610 is further used to: send a second BSR to the second access network device, where the second BSR includes the second cache information.

[0344] Optionally, the processing module 620 is further configured to cancel a BSR that is triggered before sending the second BSR but not sent to the second access network device.

[0345] A more detailed description of the transceiver module 610 and the processing module 620 can be directly obtained by referring to the relevant descriptions in the embodiments shown in Figures 3 to 5, and will not be repeated here.

[0346] Another possible design is that the apparatus 600 is used to implement the functions of the first access network device in the method embodiments shown in FIG. 3 to FIG. 5 .

[0347] Exemplarily, the processing module 620 is configured to: determine first information, where the first information is used to indicate at least one split ratio of the first RB; and the transceiver module 610 is configured to: send the first information.

[0348] Optionally, the transceiver module 610 is further configured to: send the second information, where the second information is used to indicate a first diversion ratio among the at least one diversion ratio.

[0349] Optionally, the transceiver module 610 is further configured to: receive third information from the second access network device, where the third information is used to update the diversion ratio.

[0350] Optionally, the transceiver module 610 is further used to: receive a first message from a second access network device, where the first message is used to determine the first information.

[0351] A more detailed description of the transceiver module 610 and the processing module 620 can be directly obtained by referring to the relevant descriptions in the embodiments shown in Figures 3 to 5, and will not be repeated here.

[0352] Another possible design is that the apparatus 600 is used to implement the functions of the second access network device in the method embodiments shown in FIG. 3 to FIG. 5 .

[0353] Exemplarily, the transceiver module 610 is configured to: receive first information, where the first information is used to indicate at least one split ratio of the first RB.

[0354] Optionally, the transceiver module 610 is further used to: send a first message to the second access network device, where the first message is used to determine the first information.

[0355] Optionally, the transceiver module 610 is further configured to: send third information to the first access network device, where the third information is used to update the diversion ratio.

[0356] A more detailed description of the transceiver module 610 and the processing module 620 can be directly obtained by referring to the relevant descriptions in the embodiments shown in Figures 3 to 5, and will not be repeated here.

[0357] It should be noted that device 600 may include a sending module but not a receiving module. Alternatively, device 600 may include a receiving module but not a sending module. This may depend on whether the above-mentioned solution executed by device 600 includes both sending and receiving actions. It is understood that because device 600 has communication functionality, it can also be referred to as a communication device.

[0358] FIG7 is another schematic block diagram of an apparatus provided in an embodiment of the present application. As shown in FIG7 , apparatus 700 includes one or more processors 710. The processor 710 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control an apparatus (e.g., a terminal device, a first access network device, a second access network device, or a chip), execute software programs, and process data from the software programs.

[0359] Optionally, in one design, the processor 710 may include a program (also referred to as code or instruction), which may be executed on the processor 710 to cause the apparatus 700 to perform the method performed by the terminal device, the first access network device, or the second access network device in the above method embodiment. In another possible design, the apparatus 700 includes a circuit (not shown in FIG. 7 ), which is configured to implement the functions of the terminal device, the first access network device, or the second access network device in the above method embodiment.

[0360] Exemplarily, the processor 710 can be used to execute computer programs or instructions in the memory to implement the steps performed by the terminal device, the first access network device or the second access network device in the method embodiment shown in any one of the embodiments shown in Figures 3 to 5.

[0361] Optionally, the device 700 may include one or more memories 720 on which programs (sometimes also referred to as codes or instructions) are stored. The programs can be run on the processor 710, so that the device 700 executes the method executed by the terminal device, the first access network device or the second access network device in the above embodiments.

[0362] Optionally, the processor 710 and / or the memory 720 may include an artificial intelligence (AI) module, which is used to implement AI-related functions. The AI ​​module may be implemented through software, hardware, or a combination of software and hardware. For example, the AI ​​module may include a wireless intelligent controller (RIC) module. For example, the AI ​​module may be a near real-time RIC or a non-real-time RIC.

[0363] Optionally, data may be stored in the processor 710 and / or the memory 720. The processor and memory may be provided separately or integrated together.

[0364] Optionally, the apparatus 700 may further include a communication interface 730. The processor 710 may also be sometimes referred to as a processing unit, which controls the apparatus (e.g., a terminal device, a first access network device, or a second access network device). The communication interface 730 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which is used to implement the transceiver function of the apparatus.

[0365] Optionally, the apparatus 700 further includes a communication interface 730. The processor 710 and the communication interface 730 are coupled to each other. It is understood that the communication interface 730 may be a transceiver or an input / output interface.

[0366] It is understandable that, since the device 700 has a communication function, it can also be called a communication device.

[0367] When apparatus 700 is used to implement the method of FIG3 , processor 710 is used to perform the functions of the processing unit described above, and communication interface 730 is used to perform the functions of the transceiver module described above. Whether communication interface 730 is used for sending or receiving can be determined by whether it is used to perform a sending action or a receiving action in the solution implemented by apparatus 700.

[0368] When the apparatus 700 is a chip implemented in a terminal device, the chip implements the functions of the terminal device in the method embodiment described above. The chip of the terminal device receives a signal from another module (such as a radio frequency module or antenna) in the terminal device, and the signal may be sent to the terminal device by the first access network device or the second access network device; or the chip of the terminal device sends a signal to another module (such as a radio frequency module or antenna) in the terminal device, and the signal may be sent to the first access network device or the second access network device by the terminal device.

[0369] When the above-mentioned device 700 is a chip applied to the first access network device (or the second access network device), the chip implements the functions of the first access network device (or the second access network device) in the above-mentioned method embodiment. The chip of the first access network device (or the second access network device) receives a signal from other modules (such as a radio frequency module or an antenna) in the first access network device (or the second access network device), and the signal may be sent by the terminal device to the first access network device (or the second access network device); or the chip of the network device sends a signal to other modules (such as a radio frequency module or an antenna) in the first access network device (or the second access network device), and the signal may be sent by the first access network device (or the second access network device) to the terminal device.

[0370] It is understood that when the apparatus 700 is a terminal device, a first access network device, or a second access network device, the communication interface 730 may be a transceiver, specifically including a transmitter and a receiver, where the transmitter is used to transmit signals and the receiver is used to receive signals. When the apparatus 700 is a chip applied to a terminal device, a first access network device, or a second access network device, the communication interface 730 may be an input / output circuit, where the input circuit may be used for receiving and the output interface may be used for transmitting.

[0371] Figure 8 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. As shown in Figure 8, the terminal device 800 can be applied to the system shown in Figure 1 to perform the functions of the terminal device in the above method embodiment. As shown in the figure, the terminal device 800 includes a processor 801 and a transceiver 802. Optionally, the terminal device 800 also includes a memory 803. The processor 801, the transceiver 802 and the memory 803 can communicate with each other through an internal connection path to transmit control and / or data signals. The memory 803 is used to store computer programs, and the processor 801 is used to call and run the computer program from the memory 803 to control the transceiver 802 to send and receive signals. Optionally, the terminal device 800 may also include an antenna 804 for sending the uplink data or uplink control signaling output by the transceiver 802 through a wireless signal.

[0372] The processor 801 and the memory 803 may be combined into a processing device, and the processor 801 is configured to execute program code stored in the memory 803 to implement the aforementioned functions. In a specific implementation, the memory 803 may also be integrated into the processor 801 or independent of the processor 801. The processor 801 may correspond to the processing module in FIG6 or the processor in FIG7.

[0373] The transceiver 802 may correspond to the transceiver module in FIG6 or the communication interface in FIG7 , and may also be referred to as a transceiver unit. The transceiver 802 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0374] It should be understood that the terminal device 800 shown in FIG8 is capable of implementing each step related to the terminal device in the method embodiments shown in FIG3 through FIG5 . The operations and / or functions of each module in the terminal device 800 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the description of the above method embodiments; to avoid repetition, detailed descriptions are omitted here.

[0375] The processor 801 can be used to execute the actions implemented within the terminal device described in the previous method embodiments, and the transceiver 802 can be used to execute the actions of the terminal device sending to or receiving from the network device described in the previous method embodiments. For details, please refer to the description of the previous method embodiments, which will not be repeated here.

[0376] Optionally, the terminal device 800 may further include a power supply 805 for providing power to various devices or circuits in the terminal device 800 .

[0377] In addition, in order to make the functions of the terminal device more complete, the terminal device 800 can also include one or more of an input unit 806, a display unit 807, an audio circuit 808, a camera 809 and a sensor 810, and the audio circuit can also include a speaker 808a, a microphone 808b, etc.

[0378] Figure 9 is a schematic diagram of the structure of a wireless access network device provided in an embodiment of the present application, for example, a base station. The base station 900 can be used in the system shown in Figure 1 to perform the functions of the access network device in the above-described method embodiment. As shown in Figure 9, the base station 900 may include one or more of the following: one or more (DU+RU) units 910 and one or more CUs 920. The CU 920 can communicate with the next generation core (NG core). The DU may include at least one antenna 911, at least one radio frequency unit 912, at least one processor 913, and at least one memory 914. The DU portion is primarily used for transmitting and receiving radio frequency signals, converting radio frequency signals into baseband signals, and performing partial baseband processing. The CU 920 may include at least one processor 922 and at least one memory 921. The CU and DU can communicate via interfaces. The control plane (CP) interface may be an Fs-C, such as F1-C, and the user plane (UP) interface may be an Fs-U, such as F1-U. The DU and RU can collaborate to implement physical (PHY) layer functions. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement mid-RF functions. For another example, the DU is configured to implement high-layer functions in the PHY layer, and the RU is configured to implement low-layer functions and RF functions in the PHY layer. The high-layer functions in the PHY layer may include a portion of the functions of the PHY layer that is closer to the MAC layer, and the low-layer functions in the PHY layer may include another portion of the functions of the PHY layer that is closer to the mid-RF side.

[0379] The CU 920 is primarily used for baseband processing and base station control. The DU and CU 920 may be physically located together or separately, i.e., in a distributed base station. The CU 920 is the control center of the base station and may correspond to the processing module in FIG6 or the processor in FIG7 , and may also be referred to as a processing unit. It is primarily used to perform baseband processing functions. For example, the CU 920 may be used to control the base station to execute the operation flow regarding the access network device in the above-described method embodiment.

[0380] Specifically, baseband processing on the CU and DU can be divided according to the protocol layers of the wireless network. For example, the functions of the PDCP layer and above are located in the CU, while the functions of the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are located in the DU. For another example, the CU implements the functions of the RRC layer and the PDCP layer, while the DU implements the functions of the RLC layer, the MAC layer, and the PHY layer.

[0381] In addition, optionally, the base station 900 may include one or more radio frequency units (RUs), one or more DUs, and one or more CUs. The DU may include at least one processor 913 and at least one memory 914, the RU may include at least one antenna 911 and at least one radio frequency unit 912, and the CU may include at least one processor 922 and at least one memory 921.

[0382] In one example, the CU 920 may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network with a single access indication (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 921 and the processor 922 may serve one or more single boards. That is, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be provided on each single board. The DU may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network with a single access indication (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 914 and the processor 913 may serve one or more single boards. That is, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be provided on each single board.

[0383] It should be understood that the base station 900 shown in Figure 9 is capable of implementing the various processes involving the first access network device or the second access network device in the method embodiments shown in Figures 3 to 5. The operations and / or functions of the various modules in base station 900 are respectively for implementing the corresponding processes in the aforementioned method embodiments. For details, please refer to the description of the aforementioned method embodiments; to avoid repetition, detailed descriptions are omitted here.

[0384] It should be understood that the base station 900 shown in FIG9 is only one possible architecture of a radio access network device and does not constitute any limitation on the present application. The method provided in the present application is applicable to network devices of other architectures. For example, radio access network devices including CUs, DUs, and AAUs are not limited in the present application to the specific architecture of the radio access network device.

[0385] It should be understood that FIG9 is merely an example and not a limitation, and the radio access network device may not rely on the structure shown in FIG9. For example, the radio access network device may also include an AAU, a CU, and / or a DU, or the radio access network device may also include a BBU and an adaptive radio unit (ARU). This application is not limited to this.

[0386] The CU and / or DU described above can be used to perform the actions implemented within the radio access network device described in the previous method embodiments, while the AAU can be used to perform the actions described in the previous method embodiments where the radio access network device sends or receives information to or from the terminal device. For details, please refer to the description in the previous method embodiments and will not be repeated here.

[0387] It should be noted that the above method embodiments can be applied to or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by hardware integrated logic circuits in the processor or by software instructions.

[0388] The processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0389] The steps of the method disclosed in the embodiments of this application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0390] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0391] The methods provided in the above embodiments can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic disk), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0392] An embodiment of the present application also provides a computer program product, which includes: a computer program (also referred to as code, or instructions). When the computer program is run, the method executed by the terminal device in the embodiments shown in Figures 3 to 5 is executed, or the method executed by the first access network device is executed, or the method executed by the second access network device is executed.

[0393] The present application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is executed, the method executed by the terminal device in the embodiments shown in Figures 3 to 5 is executed, or the method executed by the first access network device is executed, or the method executed by the second access network device is executed.

[0394] An embodiment of the present application also provides a chip, which includes at least one processor and a communication interface, and the communication interface and at least one processor are interconnected through a line. When the at least one processor runs a computer program or instruction, the method executed by the terminal device in the embodiments shown in Figures 3 to 5 is executed, or the method executed by the first access network device is executed, or the method executed by the second access network device is executed.

[0395] An embodiment of the present application also provides a communication system, which includes the aforementioned terminal device, a first access network device, and a second access network device.

[0396] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0397] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0398] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0399] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0400] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0401] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0402] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that, Applied to a terminal device, the method includes: Receiving first information, where the first information is used to indicate at least one splitting ratio of a first radio bearer (RB), and the first RB is a split bearer between a first access network device and a second access network device and the terminal device; Determining a first splitting ratio, where the first splitting ratio belongs to the at least one splitting ratio; Transmitting uplink data of the first RB according to the first splitting ratio.

2. The method according to claim 1, characterized in that, The first splitting ratio is a ratio of any two of the following data volumes: the data volume of the uplink data of the first RB split to the first access network device, the data volume of the uplink data of the first RB split to the second access network device, or the data volume of the uplink data of the first RB.

3. The method according to claim 1 or 2, characterized in that, The first splitting ratio is the first splitting ratio among the at least one splitting ratio.

4. The method according to claim 1 or 2, characterized in that, The determining the first splitting ratio includes: Determining the first splitting ratio according to second information, where the second information is used to indicate the first splitting ratio.

5. The method according to claim 4, wherein The first information and the second information are carried in the same radio resource control (RRC) signaling; or, The first information is carried in RRC signaling, and the second information is carried in media access control (MAC) layer signaling, physical layer signaling, or packet data convergence protocol (PDCP) control packet data unit (PDU).

6. The method according to claim 4 or 5, characterized in that, The second information includes an indication of the first RB and an indication of the first splitting ratio.

7. The method according to any one of claims 1 to 6, characterized in that, The at least one splitting ratio corresponds to at least one duration and / or at least one data volume.

8. The method according to claim 7, characterized in that, The method further includes: Determining a first time period and / or a first data volume corresponding to the first splitting ratio.

9. The method according to any one of claims 1 to 8, characterized in that, The transmitting the uplink data of the first RB according to the first splitting ratio includes: Splitting the uplink data of the first RB according to the first splitting ratio to determine first data and second data, where the first data corresponds to the first access network device and the second data corresponds to the second access network device; Transmitting the first data to the first access network device; Transmitting the second data to the second access network device.

10. The method according to claim 9, characterized in that, The method further includes: Determining first buffer information based on the first data; Sending a first buffer status report (BSR) to the first access network device, where the first BSR includes the first buffer information.

11. The method according to claim 10, wherein The method further includes: Canceling a BSR that was triggered before sending the first BSR but not sent to the first access network device.

12. The method according to any one of claims 9 to 11, characterized in that, The method further includes: Determining second buffer information based on the second data, and sending a second BSR to the second access network device, where the second BSR includes the second buffer information.

13. The method according to claim 12, wherein The method further includes: Canceling a BSR that was triggered before sending the second BSR but not sent to the second access network device.

14. A communication method, characterized in that, Applied to a first access network device, where the first access network device is an access network device that establishes a first radio bearer (RB), the method includes: Determining first information, where the first information is used to indicate at least one splitting ratio of the first RB, and the first RB is a split bearer between the first access network device and the second access network device and a terminal device; Sending the first information.

15. The method according to claim 14, wherein The first shunt ratio in the at least one shunt ratio is the ratio of any two of the following data volumes: the data volume of the uplink data of the first RB shunted to the first access network device, the data volume of the uplink data of the first RB shunted to the second access network device, and the data volume of the uplink data of the first RB.

16. The method according to claim 14 or 15, characterized in that, The method further includes: Sending second information, where the second information is used to indicate the first shunt ratio in the at least one shunt ratio.

17. The method according to claim 16, wherein The first information and the second information are carried in the same radio resource control (RRC) signaling; or, The first information is carried in RRC signaling, and the second information is carried in media access control (MAC) layer signaling, physical layer signaling, or packet data convergence protocol (PDCP) control packet data unit (PDU).

18. The method according to claim 16 or 17, characterized in that, The second information includes an indication of the first RB and an indication of the first shunt ratio.

19. The method according to any one of claims 14 to 18, characterized in that The at least one shunt ratio corresponds to at least one time period and / or at least one data volume.

20. The method according to any one of claims 14 to 19, characterized in that, The method further includes: Receiving third information from the second access network device, where the third information is used to update the shunt ratio.

21. The method according to claim 20, wherein The third information includes the uplink transmission bit rate currently provided by the second access network device for the first RB, and / or the uplink transmission bit rate predicted by the second access network device for the first RB.

22. The method according to any one of claims 14 to 21, characterized in that, The method further includes: Receiving a first message from the second access network device, where the first message is used to determine the first information.

23. The method according to claim 22, characterized in that, The first message includes the uplink transmission bit rate provided by the second access network device for the first RB.

24. A communication device, characterized in that, Includes a module for implementing the method according to any one of claims 1 to 13; or, includes a module for implementing the method according to any one of claims 14 to 23.

25. A communication device, characterized in that, Includes a processor, which is configured to execute a computer program and / or through logic circuits, such that the communication device implements the method according to any one of claims 1 to 13, or such that the communication device implements the method according to any one of claims 14 to 23.

26. The device according to claim 25, characterized in that, Further includes a memory for storing the computer program and / or the configuration file of the logic circuit.

27. The device according to claim 25 or 26, characterized in that, Further includes a communication interface for inputting and / or outputting signals.

28. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the method according to any one of claims 1 to 13 is executed, or the method according to any one of claims 14 to 23 is executed.

29. A computer program product, characterized in that, Includes a computer program, and when the computer program is run, the method according to any one of claims 1 to 13 is executed, or the method according to any one of claims 14 to 23 is executed.

30. A chip, characterized in that, Includes at least one processor and a communication interface, where the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to run a computer program or instruction to execute the method according to any one of claims 1 to 13, or to execute the method according to any one of claims 14 to 23.

31. A communication system, characterized in that, It includes a terminal device and a first access network device. Among them, the terminal device is used to implement the method described in any one of claims 1 to 13, and the first access network device is used to implement the method described in any one of claims 14 to 23.

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