Data transmission method and device and storage medium

Abstract

The embodiment of the invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for reducing the complexity of data transmission. The method comprises the following steps: receiving one-way link data radio bearer (DRB) configuration information from a second network element, wherein the one-way link DRB configuration information is used for configuring a DRB special for a one-way link; and configuring a DRB special for the one-way link based on the one-way link DRB configuration information.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a data transmission method, apparatus, and storage medium. Background Art

[0002] With the development of the fifth-generation mobile networks (5G), communication services have gradually become rich, and there are significant differences in service requirements between uplink data transmission and downlink data transmission. For example, traditional video services have high requirements for the bandwidth and throughput of downlink data transmission, while having low requirements for uplink data transmission. Another example is that game services and live broadcast services have high requirements for uplink throughput and also have relatively high requirements for latency, while having no high requirements for downlink throughput. As a result, the complexity of data transmission is relatively high. Summary of the Invention

[0003] Embodiments of the present disclosure provide a data transmission method, apparatus, and storage medium for reducing the complexity of data transmission.

[0004] To achieve the above object, the present disclosure adopts the following technical solutions:

[0005] In a first aspect, a data transmission method is provided, which is applied to a first network element. The method includes:

[0006] Receiving unidirectional link data radio bearer (DRB) configuration information from a second network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link;

[0007] Configuring a DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information.

[0008] In a second aspect, a data transmission method is provided, which is applied to a second network element. The method includes:

[0009] Sending unidirectional link DRB configuration information to a first network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link.

[0010] In a third aspect, a communication apparatus is provided, which is applied to a first network element. The apparatus includes:

[0011] A receiving unit, configured to receive unidirectional link DRB configuration information from a second network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link;

[0012] A processing unit, configured to configure a DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information.

[0013] Fourthly, a communication device is provided and applied to a second network element. The device includes:

[0014] A sending unit, configured to send unidirectional link DRB configuration information to a first network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link.

[0015] Fifthly, a communication device is provided, including: a processor and a memory; the memory is coupled to the processor; the memory is used to store instructions executable by the processor, and the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements the method provided in any one of the first aspect or the second aspect as described above.

[0016] Sixthly, a computer-readable storage medium is provided. The computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect.

[0017] Seventhly, a computer program product including computer instructions is provided. When the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect.

[0018] In the embodiments of the present disclosure, the first network element configures a DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information from the second network element, so as to perform data transmission based on the DRB dedicated to the unidirectional link, reducing the complexity of data transmission. Description of the Drawings

[0019] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0020] Figure 1 It is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure;

[0021] Figure 2 It is a schematic flowchart of a data transmission method provided by an embodiment of the present disclosure;

[0022] Figure 3 It is a schematic diagram of an association relationship provided by an embodiment of the present disclosure;

[0023] Figure 4 It is another schematic diagram of an association relationship provided by an embodiment of the present disclosure;

[0024] Figure 5 It is another schematic diagram of an association relationship provided by an embodiment of the present disclosure;

[0025] Figure 6 Another schematic diagram of the association relationship provided by the embodiments of the present disclosure;

[0026] Figure 7 Another schematic diagram of the association relationship provided by the embodiments of the present disclosure;

[0027] Figure 8 Another schematic diagram of the association relationship provided by the embodiments of the present disclosure;

[0028] Figure 9 A schematic diagram of data transmission using uplink and downlink DRBs in a DC scenario provided by the embodiments of the present disclosure;

[0029] Figure 10 A schematic diagram of data transmission using uplink and downlink DRBs in a mobile scenario provided by the embodiments of the present disclosure;

[0030] Figure 11 A schematic flowchart of another data transmission method provided by the embodiments of the present disclosure;

[0031] Figure 12 A schematic diagram of the composition of a communication device provided by the embodiments of the present disclosure;

[0032] Figure 13 Another schematic diagram of the composition of a communication device provided by the embodiments of the present disclosure;

[0033] Figure 14 A schematic diagram of the structure of a communication device provided by the embodiments of the present disclosure. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0035] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", are to be construed in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc. are intended to indicate that the specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0038] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0039] In addition, the use of "based on" means open and inclusive, because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may, in practice, be based on additional conditions or values beyond those stated.

[0040] A radio bearer (RB) is the general term for the base station to allocate different layer protocol entities and configurations for a user equipment (UE), including a series of resources allocated by a service data adaptation protocol (SDAP), a packet data convergence protocol (PDCP) protocol entity, a radio link control layer (RLC) protocol entity, a medium access control (MAC) protocol entity, and a physical layer (PHY). In a 5G new radio (NR) wireless network, a data radio bearer (DRB) is used to carry user data packets, and a signaling radio bearer (SRB) is used to carry user signaling messages. For data transmission, multiple DRBs can be established simultaneously between the UE and the base station node, and each DRB provides the same forwarding processing for data packets. There are multiple quality of service flows (QoS flows) under a protocol data unit session (PDU session), and one or more QoS flows are mapped to a DRB at the SDAP layer. Data of different DRBs are multiplexed at the MAC layer after being processed by the PDCP layer and the RLC layer. At the MAC layer, the MAC entity performs the transmission of transport blocks (TBs) on multiple hybrid automatic repeat request (HARQ) processes through the HARQ entity.

[0041] In 5G, the parameter configuration of the upper-layer and lower-layer protocol entities for uplink data transmission and downlink data transmission is implemented through the configuration of a bearer by the RRC layer. The configuration of an uplink and downlink parameter is included in the configuration of a DRB. Since the data under the same DRB uses the same forwarding process, using the same DRB for both the uplink and downlink also makes the forwarding process of uplink data and downlink data the same. In a dual-connection scenario, whether it is uplink data transmission or downlink data transmission, it corresponds to the same master node (MN), secondary node, master cell group (MCG), and secondary cell group (SCG). Correspondingly, the MCG bearer and SCG bearer cannot distinguish between uplink data transmission and downlink data transmission either. In addition, when multiple carriers are used for data transmission, the uplink and downlink data transmissions use the same primary carrier component (PCC) and each carrier corresponds to one HARQ entity.

[0042] With the gradual enrichment of communication services, there are significant differences in service requirements between uplink data transmission and downlink data transmission. For example, traditional video services have high demands for the bandwidth and throughput of downlink data transmission, but low demands for uplink data transmission. Another example is that game services and live broadcast services have high requirements for uplink throughput and also have relatively high demands for latency. However, in current 5G, the coupling of the DRB, HARQ entity, and resource configuration is very strong, resulting in a high degree of correlation between uplink data transmission and downlink data transmission. That is to say, in the related art, it is a design with tight coupling between the uplink and downlink. Whether it is uplink data transmission or downlink data transmission, the same HARQ entity, DRB, serving cell, and physical resources are configured at the base station and the UE. When the uplink and downlink services have large differences, the same configuration is difficult to adapt to both uplink data transmission and downlink data transmission simultaneously, resulting in a problem of high transmission complexity.

[0043] Based on this, the embodiments of the present disclosure provide a data transmission method, apparatus, and storage medium. The first network element configures a unidirectional-link dedicated DRB based on the unidirectional-link DRB configuration information from the second network element. In this way, each unidirectional link has a dedicated DRB, facilitating data transmission based on each unidirectional-link dedicated DRB and reducing the complexity of data transmission.

[0044] The solutions of the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0045] The technical solutions provided in the embodiments of the present disclosure can be applied to 5G or the sixth-generation (6G) mobile communication network, etc., and the embodiments of the present disclosure do not limit this. The technical solutions provided in the embodiments of the present disclosure can be applied to various mobile communication network scenarios, including traditional cellular scenarios, sidelink (SL) communication scenarios, integrated access backhaul (IAB) scenarios, etc., and the embodiments of the present disclosure do not limit this.

[0046] In the embodiments of the present disclosure, the first network element includes but is not limited to at least one of the following: RAN, UE, CU, DU, relay node, IAB node, on board unit (OBU), Road Side Unit (RSU). The second network element includes but is not limited to at least one of the following: RAN, UE, CU, DU, relay node, IAB node, OBU, RSU.

[0047] In the embodiments of the present disclosure, a network element may include one or more network nodes, one or more network functions, one or more network layers, one or more network devices, and / or one or more network entities. For example, a network element may be a RAN node (RANNode), the Radio Resource Control (RRC) layer of the RAN, the MAC layer of the RAN, the MAC entity of the RAN, a Central Unit (CU), a Distributed Unit (DU), a UE, or an Integrated access and backhaul (abbreviated as IAB) Node. The RAN node may be a base station device, such as a 4G base station eNodeB, a 5G base station gNodeB, or a next-generation new base station. In the embodiments of the present invention, the DRB may be at least one of the following: a radio bearer related to communication, a radio bearer related to sensing, a radio bearer related to Artificial Intelligence (AI), a radio bearer related to data services, a radio bearer related to computing, and a radio bearer related to security / trust.

[0048] Figure 1 It is a schematic structural diagram of a communication system provided for the embodiments of the present disclosure. As Figure 1As shown, the communication system 10 includes a plurality of base stations (such as base station 21 and base station 22) and a plurality of terminals (such as terminal 31, terminal 32, terminal 33, and terminal 34). Among them, the plurality of base stations and the plurality of terminals can be connected through a wired network or a wireless network. Among them, the wired network or the wireless network can include routers, switches, or other devices that facilitate communication between the plurality of base stations and the plurality of terminals, and the embodiments of the present disclosure do not limit this.

[0049] In some embodiments, the base station is used to provide wireless access services for a plurality of terminals. Specifically, one base station provides one service coverage area (also known as a cell). Terminals entering this area can communicate with the base station through wireless signals to receive the wireless access services provided by the base station. There may be an overlap between the service coverage areas of the base stations, and terminals in the overlapping area can receive wireless signals from multiple base stations.

[0050] In some embodiments, each of the plurality of base stations can be connected to a plurality of terminals. For example, base station 21 is connected to terminal 31 and terminal 32. Among them, terminal 31 and terminal 32 can be located in the same cell, or terminal 31 and terminal 32 can be located in different cells. That is, one base station can provide network services to terminals in one cell or can also provide network services to terminals in multiple cells at the same time.

[0051] In some embodiments, each of the plurality of base stations (such as base station 21) can be any one of an evolved Node B (eNB), a next-generation Node B (gNB), a transmission-receive point (TRP), a transmission point (TP), an access point (AP), and some other access node. According to the size of the provided service coverage area, the base station can be further divided into a macro base station for providing a macro cell, a micro base station for providing a pico cell, and a femto base station for providing a femto cell. With the continuous evolution of wireless communication technology, future base stations may also adopt other names.

[0052] In some embodiments, each of the multiple terminals (e.g., terminal 31) can be a device with wireless transceiver capabilities, such as a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The specific types of terminals are not limited in the embodiments of the present invention.

[0053] In some embodiments, communication can occur between terminals. For example, Figure 1 terminal 31 and terminal 32 in [the figure] perform SL communication, and terminal 33 and terminal 34 perform SL communication. Communication between terminals refers to direct communication between two terminals. Taking device-to-device (D2D) communication as an example, the terminals performing D2D communication can be called D2D terminals, the link between two terminals performing D2D communication can be called a pair of D2D links, and the two terminals in a pair of D2D links can be a receiving end and a transmitting end for each other. In one transmission, one of the terminals can be the transmitting end and the other can be the receiving end. If both terminals support simultaneous transceiver functions, then each D2D terminal can be both a transmitting end and a receiving end simultaneously.

[0054] It should be understood that Figure 1 is an exemplary structural diagram, Figure 1 the number of devices included in the shown communication system is not limited. For example, the number of base stations is not limited and the number of terminals is not limited. And, in addition to Figure 1 the shown devices, Figure 1 the shown communication system can also include other devices, which are not defined herein.

[0055] Next, as Figure 2 shown, an embodiment of the present disclosure provides a data transmission method, which is applied to a first network element. The first network element can be any one of the terminals shown above Figure 1 such as terminal 31. The method can include the following steps:

[0056] S101. Receive unidirectional link DRB configuration information from a second network element.

[0057] In some embodiments, to reduce the complexity of data transmission, after configuring the unidirectional link DRB configuration information, the second network element may send the unidirectional link DRB configuration information to the first network element. Correspondingly, the first network element receives the unidirectional link DRB configuration information from the second network element. The unidirectional link DRB configuration information is used to configure the DRB dedicated to the unidirectional link. Among them, in the case of distinguishing between uplink and downlink scenarios, the second network element may be the base station 21 shown above Figure 1 In scenarios such as D2D, vehicle-to-X communication (V2X), IAB, SL, and intelligent interaction that do not distinguish between uplink and downlink, taking the first network element as the terminal 31 shown above Figure 1 as an example, the second network element may be the terminal 32 connected to the terminal 31 shown above Figure 1 or the base station 21 shown above Figure 1 The embodiments of the present disclosure do not limit the specific implementation of the second network element. Moreover, in the above scenarios that do not distinguish between uplink and downlink, the first network element may also be other devices to perform data transmission as a transmitter or a receiver. For example, the first network element may be an IAB node to perform data transmission as a transmitter or a receiver. Another example is that the first network element may be an intelligent robot to perform data transmission as a transmitter or a receiver.

[0058] In some embodiments, the unidirectional link includes any one of the following: uplink, downlink, transmit link, and receive link. Taking the first network element as the terminal and the second network element as the base station as an example, the uplink refers to the data transmission path for the terminal to send data to the base station, and the downlink refers to the data transmission path for the base station to send data to the terminal. Taking the first network element as the first terminal and the second network element as the second terminal as an example, the transmit link refers to the data transmission path for the first terminal to send data to the second terminal, and the receive link refers to the data transmission path for the first terminal to receive the data sent by the second terminal.

[0059] In some embodiments, the DRB dedicated to the unidirectional link includes any one of the following: uplink-dedicated DRB, downlink-dedicated DRB, transmit-link-dedicated DRB, and receive-link-dedicated DRB. Among them, the transmit link may also have other names, such as the send link. The embodiments of the present disclosure do not limit this.

[0060] In some embodiments, the unidirectional link DRB configuration information only includes information related to the unidirectional link. Taking the unidirectional link as the uplink as an example, the uplink DRB configuration information may only include information related to the uplink and does not include information related to the downlink. Taking the unidirectional link as the downlink as an example, the downlink DRB configuration information may only include information related to the downlink and does not include information related to the uplink. In this way, the DRB configuration of the uplink is decoupled from the DRB configuration of the downlink, so that the first network element can perform independent uplink and downlink data transmissions respectively according to the differences between the uplink service and the downlink service, thereby reducing the complexity of data transmission.

[0061] In some embodiments, the unidirectional link DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the unidirectional link, the identifier of the HARQ entity dedicated to the unidirectional link, the set of physical resources corresponding to the unidirectional link, the SDAP configuration information of the unidirectional link, the PDCP configuration information of the unidirectional link, the RLC configuration information of the unidirectional link, the MAC configuration information of the unidirectional link, the cell identifier of the unidirectional link, the primary cell identifier of the unidirectional link, and the cell group identifier of the unidirectional link.

[0062] For example, taking the unidirectional link as the uplink (UL) as an example, the uplink DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the uplink, the identifier of the HARQ entity dedicated to the uplink, the set of physical resources corresponding to the uplink, the SDAP configuration information of the uplink, the PDCP configuration information of the uplink, the RLC configuration information of the uplink, the MAC configuration information of the uplink, the cell identifier of the uplink, the primary cell identifier of the uplink, and the cell group identifier of the uplink. In some embodiments, only the DRB dedicated to the uplink is established, modified, or released in the uplink DRB configuration information.

[0063] Again, for example, taking the unidirectional link as the downlink (DL) as an example, the downlink DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the downlink, the identifier of the HARQ entity dedicated to the downlink, the set of physical resources corresponding to the downlink, the SDAP configuration information of the downlink, the PDCP configuration information of the downlink, the RLC configuration information of the downlink, the MAC configuration information of the downlink, the cell identifier of the downlink, the primary cell identifier of the downlink, and the cell group identifier of the downlink. In some embodiments, only the DRB dedicated to the downlink is established, modified, or released in the downlink DRB configuration information.

[0064] For another example, taking the unidirectional link as the transmission link, the DRB configuration information of the transmission link (e.g., txdrb-ToAddModList) includes at least one of the following: the identifier of the DRB dedicated to the transmission link (e.g., txdrb-Identity), the identifier of the HARQ entity dedicated to the transmission link, the physical resource set corresponding to the transmission link, the SDAP configuration information of the transmission link (e.g., sdap-Config), the PDCP configuration information of the transmission link (e.g., pdcp-Config), the RLC configuration information of the transmission link, the MAC configuration information of the transmission link, the cell identifier of the transmission link, the primary cell identifier of the transmission link, and the cell group identifier of the transmission link. In some embodiments, only the DRB dedicated to the transmission link is established, modified, or released in the DRB configuration information of the transmission link.

[0065] For another example, taking the unidirectional link as the receiving link, the DRB configuration information of the receiving link (e.g., rxdrb-ToAddModList) includes at least one of the following: the identifier of the DRB dedicated to the receiving link (e.g., dldrb-Identity), the identifier of the HARQ entity dedicated to the receiving link, the physical resource set corresponding to the receiving link, the SDAP configuration information of the receiving link (e.g., dlsdap-Config), the PDCP configuration information of the receiving link (e.g., dlpdcp-Config), the RLC configuration information of the receiving link, the MAC configuration information of the receiving link, the cell identifier of the receiving link, the primary cell identifier of the receiving link, and the cell group identifier of the receiving link. In some embodiments, only the DRB dedicated to the receiving link is established, modified, or released in the DRB configuration information of the receiving link.

[0066] In some embodiments, the uplink configures the uplink DRB independently so that data transmission has a dedicated uplink primary cell or cell group, and the downlink configures the downlink DRB independently so that data transmission has a dedicated downlink primary cell or cell group. Through the independent configuration of the uplink and downlink DRBs, the uplink and downlink have different primary cells or cell groups.

[0067] In some embodiments, the above physical resource set includes at least one of the following: partial bandwidth (bandwidthpart, BWP) identifier, carrier identifier, and cell identifier.

[0068] In some embodiments, the above BWP is the active BWP. The cell includes at least one of the following: base station, distribute unit (DU), and transmission receive point (TRP).

[0069] In some embodiments, the physical resources included in the above-mentioned physical resource set include at least one of the following: BWP resources, carrier resources, frequency band resources, and cell resources. The frequency band resources are spectrum bandwidth resources related to absolute frequency. For example, the 4.9 GHz frequency band corresponds to a 100 MHz bandwidth of 4800 MHz-4900 MHz. A physical resource set may include multiple different BWP resources, multiple different carrier resources, multiple different frequency band resources, and multiple different cell resources.

[0070] In some embodiments, a DRB dedicated to a unidirectional link is associated with a HARQ entity dedicated to the unidirectional link. For example, taking the unidirectional link as an uplink as an example, when the uplink DRB configuration information includes an identifier of an uplink-dedicated DRB (such as an uplink DRB identifier) and an identifier of an uplink-dedicated HARQ entity (such as an uplink HARQ entity identifier), the uplink-dedicated DRB is associated with the uplink-dedicated HARQ entity through the identifier of the uplink-dedicated DRB and the identifier of the uplink-dedicated HARQ entity. For another example, taking the unidirectional link as a downlink as an example, when the downlink DRB configuration information includes an identifier of a downlink-dedicated DRB (such as a downlink DRB identifier) and an identifier of a downlink-dedicated HARQ entity, the downlink-dedicated DRB is associated with the downlink-dedicated HARQ entity through the identifier of the downlink-dedicated DRB and the identifier of the downlink-dedicated HARQ entity (such as a downlink HARQ entity identifier).

[0071] In some embodiments, the HARQ entity dedicated to the unidirectional link is associated with a physical resource set corresponding to the unidirectional link. The physical resource set corresponding to the unidirectional link may be a physical resource set dedicated to the unidirectional link, or may be the same physical resource set as other unidirectional links. For example, the uplink physical resources and the downlink physical resources may be completely different, or may be partially the same or completely the same.

[0072] In some embodiments, there is an association relationship between the unidirectional link-specific DRB, the unidirectional link-specific HARQ entity, and the physical resource set corresponding to the unidirectional link. For example, taking the unidirectional link as an uplink as an example, when the uplink DRB configuration information includes an identifier of the uplink-specific DRB, an identifier of the uplink-specific HARQ entity, and a physical resource set corresponding to the uplink, exemplarily, Figure 3 As shown, it is a schematic diagram of an association relationship provided by an embodiment of the present disclosure, see Figure 3, the data of the uplink-dedicated DRB can use the uplink-dedicated HARQ entity and the physical resources in the physical resource set corresponding to the uplink for uplink data transmission. For another example, taking the unidirectional link as the downlink as an example, when the downlink DRB configuration information includes the identifier of the downlink-dedicated DRB, the identifier of the downlink-dedicated HARQ entity and the physical resource set corresponding to the downlink, for example, Figure 4 FIG. 1 is another schematic diagram of an association relationship provided by an embodiment of the present disclosure, see Figure 4 , the data of the downlink-dedicated DRB can be transmitted downlink using the downlink-dedicated HARQ entity and the physical resources in the physical resource set corresponding to the downlink.

[0073] In some embodiments, when the unidirectional link DRB configuration information includes an identifier of a HARQ entity dedicated to the unidirectional link and a physical resource set corresponding to the unidirectional link, and the physical resource set includes a carrier identifier, it means that the HARQ entity dedicated to the unidirectional link can use the carrier resources corresponding to the carrier identifier for data transmission.

[0074] For example, taking the unidirectional link as the uplink, when the uplink DRB configuration information includes the identifier of the uplink-specific HARQ entity and two uplink carrier identifiers (for example, one uplink carrier identifier at 800MHz and one uplink carrier identifier at 3.5GHz), it means that the uplink-specific HARQ entity uses the two uplink carrier resources corresponding to the two uplink carrier identifiers for uplink data transmission. In this way, the uplink-specific HARQ entity uses low-frequency uplink carrier resources for uplink data transmission to improve the reliability of uplink data transmission, and uses high-frequency uplink carrier resources for uplink data transmission to improve the throughput of uplink data transmission. In addition, uplink transmission data that is erroneously transmitted on high-frequency uplink carrier resources can be retransmitted on low-frequency uplink transmission resources. For example, Figure 5 FIG. 1 is another schematic diagram of an association relationship provided by an embodiment of the present disclosure, see Figure 5 , assuming that the uplink DRB configuration information includes the identifier of the uplink dedicated HARQ entity as the uplink HARQ entity, and the two uplink carrier identifiers are uplink carrier 1 and uplink carrier 2 respectively, then the uplink HARQ entity can perform uplink data transmission on uplink carrier 1 and uplink carrier 2.

[0075] For another example, taking the unidirectional link as the downlink as an example, when the downlink DRB configuration information includes the identifier of the HARQ entity dedicated to the downlink and two downlink carrier identifiers (for example, one downlink carrier identifier at 3.5 GHz and one downlink carrier identifier at 6 GHz), it means that the HARQ entity dedicated to the downlink uses two downlink carrier resources corresponding to the two downlink carrier identifiers for downlink data transmission. Exemplarily, as Figure 6 shown, it is another schematic diagram of the association relationship provided by the embodiments of the present disclosure. Refer to Figure 6 , assuming that the downlink DRB configuration information includes that the identifier of the HARQ entity dedicated to the downlink is the downlink HARQ entity, and the two downlink carrier identifiers are downlink carrier 1 and downlink carrier 2 respectively, then the downlink HARQ entity can perform downlink data transmission on downlink carrier 1 and downlink carrier 2.

[0076] In some embodiments, the uplink and the downlink are decoupled on the carrier through their respective DRB configurations. Optionally, the uplink and downlink data can be transmitted using carriers in different frequency bands.

[0077] It should be understood that the transmission power of the terminal is usually less than that of the base station. The terminal uses low-frequency carrier resources and the base station uses high-frequency carrier resources to ensure the performance of uplink and downlink data transmission. In this way, by respectively configuring different dedicated HARQ entities and carrier resources for the uplink and the downlink, uplink-downlink decoupling is achieved, and the effect of ensuring uplink-downlink differences is realized.

[0078] In some embodiments, the DRB dedicated to the unidirectional link is associated with the physical resource set corresponding to the unidirectional link. When the unidirectional link DRB configuration information includes the identifier of the DRB dedicated to the unidirectional link and the physical resource set corresponding to the unidirectional link, it means that the data of the DRB dedicated to the unidirectional link can use the physical resource set corresponding to the unidirectional link for data transmission.

[0079] For example, taking the unidirectional link as the uplink as an example, when the uplink DRB configuration information includes the identifier of the DRB dedicated to the uplink and the physical resource set corresponding to the uplink, it means that the DRB dedicated to the uplink can use the physical resource set corresponding to the uplink for data transmission. Exemplarily, as Figure 7 shown, it is another schematic diagram of the association relationship provided by the embodiments of the present disclosure. Refer to Figure 7 , the DRB dedicated to the uplink corresponds to the physical resource set corresponding to the uplink.

[0080] For another example, taking the unidirectional link as the downlink as an example, when the downlink DRB configuration information includes the identifier of the downlink-specific DRB and the physical resource set corresponding to the downlink, it means that the downlink-specific DRB can use the physical resource set corresponding to the downlink for data transmission. Taking the above physical resource set including the carrier identifier as an example, the uplink-specific DRB can use the uplink carrier resources dedicated to the uplink for data transmission, and the downlink-specific DRB can use the downlink carrier resources dedicated to the downlink for data transmission. Exemplarily, as Figure 8 shown, it is another schematic diagram of the association relationship provided by the embodiment of the present disclosure. Refer to Figure 8 , the downlink-specific DRB corresponds to the physical resource set corresponding to the downlink.

[0081] As a possible example, taking the unidirectional link as the downlink as an example, when the downlink DRB configuration information includes the identifier of the downlink-specific DRB and two BWP identifiers, it means that the data of the downlink-specific DRB can use the two BWPs corresponding to the two BWP identifiers for downlink data transmission. Among them, these two BWPs can be from different frequency bands (bands). Among them, the two BWPs can be active BWPs, that is, the data of the downlink-specific DRB can use the two active BWPs for downlink data transmission. In some embodiments, receiving the unidirectional link DRB configuration information from the second network element can be receiving the unidirectional link DRB configuration information from the second network element through the first control message. That is to say, receiving the first control message sent by the second network element, and the first control message includes the unidirectional link DRB configuration information. In some embodiments, the first control message includes at least one of the following: radio resource control (RRC) message, DRB configuration message. Among them, the RRC message is a control message sent by the base station to the UE, and multiple information elements (IEs) related to the bearer are included in the RRC message. The first control information can also have other names, for example, the first control signaling.

[0082] In some embodiments, the first control message may include one piece of unidirectional link DRB configuration information or multiple pieces of unidirectional link DRB configuration information. Taking the example where the first control message includes uplink DRB configuration information and downlink DRB configuration information, when the uplink DRB configuration information includes the identifier of the uplink dedicated DRB and the uplink cell identifier (such as base station 1), and the downlink DRB configuration information includes the identifier of the downlink dedicated DRB and the downlink cell identifier (such as base station 2), it means that the uplink of the first network element is connected to base station 1 and uplink data transmission is performed with base station 1 through the uplink dedicated DRB, and the downlink of the first network element is connected to base station 2 and downlink data transmission is performed with base station 2 through the downlink dedicated DRB.

[0083] As an example, a data transmission method provided by an embodiment of the present disclosure is applicable to a dual connectivity (DC) scenario. In some embodiments, in the DC scenario, the uplink and the downlink may be connected to the same cell or different cells. For example, the first control message may also be used to indicate the uplink primary cell corresponding to the uplink dedicated DRB and the downlink primary cell corresponding to the downlink dedicated DRB. The uplink primary cell and the downlink primary cell may be the same or different. For example, the first control message includes the identifier of the uplink dedicated DRB, the uplink primary cell identifier, the identifier of the downlink dedicated DRB, and the downlink primary cell identifier. For another example, the first control message further includes uplink master cell group (MCG) bearer information and downlink MCG bearer information, and the uplink MCG bearer information and the downlink MCG bearer information may be the same or different. In the DC scenario, assume that the UE is connected to base station 1 and base station 2 simultaneously and data transmission is performed with both base stations simultaneously. If the same DRB is used for uplink and downlink transmission of each base station in the dual connection, if the connection between the UE and base station 1 is interrupted uplink, it will affect the downlink transmission between the UE and base station 1. Through the technical solution of the present disclosure, as Figure 9 shown, it is a schematic diagram of data transmission using uplink and downlink DRBs in a DC scenario provided by an embodiment of the present disclosure. Refer to Figure 9, the UE and base station 1 use an uplink DRB (the uplink data of the UE can be transmitted using low frequency), and the UE and base station 1 use a downlink DRB (the downlink data of the UE can be transmitted using high frequency). Through the separation / decoupling of the uplink and downlink DRBs, the data transmission between the UE and base station 1 can support using low frequency for the uplink to improve data transmission reliability and using high frequency for the downlink to improve throughput. The two-way link between the UE and base station 2 can also use the uplink DRB and downlink DRB methods. In this way, the downlink data transmission of the UE can use the downlink DRB of base station 1 and the downlink DRB of base station 2, and the uplink data transmission of the UE can use the uplink DRB of base station 1 and the uplink DRB of base station 2. Among them, uplink DRB1, downlink DRB1, uplink DRB2, and downlink DRB2 can be DRBs independently configured through different unidirectional link DRB configuration information.

[0084] As another example, a data transmission method provided by an embodiment of the present disclosure is also applicable to a mobility scenario. For example, as Figure 10 shown, it is a schematic diagram of data transmission using uplink and downlink DRBs in a mobile scenario provided by an embodiment of the present disclosure. Refer to Figure 10 , during the movement of the UE, the downlink DRB data transmission between the UE and the source base station can be migrated to the target base station. At the same time, the uplink DRB between the UE and the source base station remains unchanged. For another example, under a centralized unit (CU), there are two distribute units (DUs). The uplink uses DU1 to connect to the UE and uses the uplink DRB for uplink transmission, and the downlink data is migrated to DU2 and the downlink DRB is used between DU2 and the UE for downlink transmission. In some embodiments, the migration of the downlink DRB can be performed through the first control message.

[0085] As another example, a data transmission method provided by an embodiment of the present disclosure is also applicable to scenarios where the uplink and downlink are not distinguished, such as D2D, V2X, IAB, etc. For the above scenarios where the uplink and downlink are not distinguished, a data transmission method provided by an embodiment of the present disclosure configures a unidirectional link dedicated DRB for the unidirectional link. For example, a transmit-link dedicated DRB is configured for the transmit link, and a receive-link dedicated DRB is configured for the receive link. Furthermore, the first network element can perform independent transmission of service data in different link directions.

[0086] Exemplarily, taking the first network element as both the transmitter and receiver as an example, the first control message can include two types of information: the transmit-link DRB configuration information used by the first network element as the transmitter and the receive-link DRB configuration information used by the first network element as the receiver.

[0087] S102. Configure a unidirectional link dedicated DRB based on the unidirectional link DRB configuration information.

[0088] As an example, configuring a DRB dedicated to a unidirectional link includes at least one of the following:

[0089] Establishing a DRB dedicated to a unidirectional link;

[0090] Modifying a DRB dedicated to a unidirectional link;

[0091] Releasing a DRB dedicated to a unidirectional link. Here, the release of the DRB can also be characterized by other names, such as deletion, demolition, etc., and the embodiments of the present disclosure do not limit this.

[0092] It should be noted that in the related prior art, the same DRB configuration is used for the two-way links of the uplink and the downlink, or the transmit link and the receive link, without distinguishing between the uplink and the downlink or the transmit end and the receive end. The coupling of the DRB configuration is relatively strong, and the uplink and the downlink or the transmit end and the receive end cannot configure the DRB independently. For example, it is impossible to independently establish, modify, or release the DRB. For example, in the RRC protocol of 5G TS38.331, the information element Radio Bearer Configuration (IE RadioBearerConfig) contains information on DRB establishment, modification, and release. Specifically as follows:

[0093]

[0094]

[0095] It can be seen from the above that in the related technology, the same DRB configuration is used for the two-way links of the uplink and the downlink without distinguishing between the uplink and the downlink. The technical solution of the embodiments of the present disclosure is to configure a DRB dedicated to each unidirectional link. For example, a DRB dedicated to the uplink is configured for uplink data transmission, and a DRB dedicated to the downlink is configured for downlink data transmission. Taking IE RadioBearerConfig as an example, in the embodiments of the present disclosure, dedicated messages for establishing, modifying, and deleting the DRB dedicated to the uplink and the DRB dedicated to the downlink are respectively configured in the IE RadioBearerConfig. Exemplarily, the relevant content is as follows:

[0096]

[0097]

[0098] In some embodiments, only the DRB dedicated to the uplink is established, modified, or released in the uplink DRB configuration information.

[0099] In some embodiments, only the downlink dedicated DRB is established, modified, or released in the downlink DRB configuration information.

[0100] As an example, the control signaling IE for uplink DRB addition / modification is uldrb-ToAddModList. As an example, the control signaling IE for uplink DRB release is uldrb-ToReleaseList).

[0101] As an example, the control signaling IE for downlink DRB addition / modification is dldrb-ToAddModList. As an example, the control signaling IE for downlink DRB release is dldrb-ToReleaseList).

[0102] As another example, the relevant signaling for configuring the uplink dedicated DRB and the downlink dedicated DRB can also be: ULRadioBearerConfig, DLRadioBearerConfig. All uplink bearer information is configured in ULRadioBearerConfig, and all downlink bearer information is configured in DLRadioBearerConfig.

[0103] As another example, the relevant signaling for configuring the uplink dedicated DRB and the downlink dedicated DRB can also be: ULDataRadioBearerConfig, DLDataRadioBearerConfig. All uplink data bearer information is configured in ULDataRadioBearerConfig, and all downlink data bearer information is configured in DLDataRadioBearerConfig.

[0104] As a possible example, the control signaling IE for uplink DRB configuration includes at least one of the following: the identifier of the uplink dedicated DRB (e.g., uldrb-Identity), the identifier of the uplink dedicated HARQ entity (such as UL HARQ entity ID), the corresponding physical resource set for the uplink, the SDAP configuration information for the uplink (e.g., ulsdap-Config), the PDCP configuration information for the uplink (e.g., ulpdcp-Config), the RLC configuration information for the uplink, the MAC configuration information for the uplink, the cell identifier for the uplink, the primary cell identifier for the uplink, the cell group identifier for the uplink.

[0105] As a possible example, the control signaling for downlink DRB configuration includes at least one of the following: the identifier of the downlink dedicated DRB (e.g., dldrb-Identity), the identifier of the downlink dedicated HARQ entity (such as DL HARQ entityID), the corresponding physical resource set for the downlink, the SDAP configuration information for the downlink (e.g., dlsdap-Config), the PDCP configuration information for the downlink (e.g., dlpdcp-Config), the RLC configuration information for the downlink, the MAC configuration information for the downlink, the cell identifier for the downlink, the primary cell identifier for the downlink, the cell group identifier for the downlink.

[0106] As an example, taking the configuration of a transmit-link dedicated DRB and a receive-link dedicated DRB as an example, the configuration of a unidirectional-link dedicated DRB based on the unidirectional-link DRB configuration information is illustrated. Exemplarily, the relevant signaling content is as follows:

[0107]

[0108] Among them, in the above content, txdrb is the transmit-link dedicated DRB, and rxdrb is the receive-link dedicated DRB.

[0109] As another example, the relevant signaling for taking the configuration of a transmit-link dedicated DRB and a receive-link dedicated DRB as an example can also be: TXRadioBearerConfig, RXRadioBearerConfig. All transmit-link bearer information is configured in TXRadioBearerConfig, and all receive-link bearer information is configured in RXRadioBearerConfig.

[0110] As another example, the relevant signaling for taking the configuration of a transmit-link dedicated DRB and a receive-link dedicated DRB as an example can also be: TXDataRadioBearerConfig, RXDataRadioBearerConfig. All transmit-link data bearer information is configured in TXDataRadioBearerConfig, and all receive-link data bearer information is configured in RXDataRadioBearerConfig.

[0111] As a possible example, the control signaling IE for the transmit link DRB configuration includes at least one of the following: the identifier of the DRB dedicated to the transmit link (e.g., txdrb-Identity), the identifier of the HARQ entity dedicated to the transmit link (such as TX HARQ entity ID), the set of physical resources corresponding to the transmit link, the SDAP configuration information of the transmit link (e.g., txsdap-Config), the PDCP configuration information of the transmit link (e.g., txpdcp-Config), the RLC configuration information of the transmit link, the MAC configuration information of the transmit link, the cell identifier of the transmit link, the primary cell identifier of the transmit link, and the cell group identifier of the transmit link.

[0112] As a possible example, the control signaling for the receive link DRB configuration includes at least one of the following: the identifier of the DRB dedicated to the receive link (e.g., rxdrb-Identity), the identifier of the HARQ entity dedicated to the receive link (such as RX HARQ entity ID), the set of physical resources corresponding to the receive link, the SDAP configuration information of the receive link (e.g., rxsdap-Config), the PDCP configuration information of the receive link (e.g., rxpdcp-Config), the RLC configuration information of the receive link, the MAC configuration information of the receive link, the cell identifier of the receive link, the primary cell identifier of the receive link, and the cell group identifier of the receive link.

[0113] In some embodiments, after the first network element configures the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information, the first network element may perform data transmission based on the DRB dedicated to the unidirectional link. For example, perform uplink data transmission based on the DRB dedicated to the uplink, and perform downlink data transmission based on the DRB dedicated to the downlink, etc.

[0114] Based on Figure 2 In the illustrated embodiment, the first network element configures the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information from the second network element, so as to perform data transmission based on the DRB dedicated to the unidirectional link. In this way, each unidirectional link is configured with its corresponding dedicated DRB for data transmission, so that the DRB configuration of the uplink is decoupled from the DRB configuration of the downlink, or the DRB configuration of the transmit link is decoupled from the DRB configuration of the receive link, thereby reducing the complexity of data transmission.

[0115] In some embodiments, as Figure 11 illustrated, the embodiments of the present disclosure also provide a data transmission method, which is applied to the second network element. The second network element may be the base station 21 as shown above Figure 1 illustrated, and the method may include the following steps:

[0116] S201. Send the unidirectional link DRB configuration information to the first network element.

[0117] In some embodiments, in order to reduce the complexity of data transmission, after configuring the unidirectional link DRB configuration information, the second network element may send the unidirectional link DRB configuration information to the first network element. The unidirectional link DRB configuration information is used to configure the DRB dedicated to the unidirectional link.

[0118] For the description of the unidirectional link DRB configuration information, reference may be made to the relevant description in the embodiments shown above. Figure 2 Details are not described herein again.

[0119] In some embodiments, sending the unidirectional link DRB configuration information to the first network element may be that the second network element sends the unidirectional link DRB configuration information to the first network element through a first control message. That is, sending the unidirectional link DRB configuration information to the first network element may be that the second network element sends a first control message to the first network element, and the first control message includes the unidirectional link DRB configuration information. The first control message includes at least one of the following: RRC message, DRB configuration message.

[0120] In some embodiments, after configuring the unidirectional link DRB configuration information, the second network element may configure the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information. In this way, it is convenient for the second network element and the first network element to have consistent configuration (cognition) of the DRB dedicated to the unidirectional link, which helps to reduce the complexity of data transmission and improve the data transmission effect. For the description of configuring the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information, reference may be made to the relevant description in the embodiments shown above. Figure 2 Details are not described herein again.

[0121] The above mainly introduces the solution provided by the present disclosure from the perspective of interaction between network elements. It can be understood that each network element, such as the first network element or the second network element, includes the corresponding hardware structure and / or software module for performing each function in order to achieve the above functions. Those skilled in the art should easily realize that, combined with the algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0122] Figure 12 The following shows a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure. As Figure 12As shown, the communication device 30 includes a receiving unit 301 and a processing unit 302.

[0123] The communication device 30 may be the above-mentioned first network element or a chip in the first network element. When the communication device 30 is used to implement the functions of the first network element in the above embodiments, each unit is specifically used to implement the following functions.

[0124] The receiving unit 301 is configured to receive the unidirectional link data radio bearer (DRB) configuration information from the second network element, and the unidirectional link DRB configuration information is used to configure the DRB dedicated to the unidirectional link;

[0125] The processing unit 302 is configured to configure the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information.

[0126] In some embodiments, the unidirectional link includes any one of the following: uplink, downlink, transmit link, receive link.

[0127] In some embodiments, the DRB dedicated to the unidirectional link includes any one of the following: uplink-dedicated DRB, downlink-dedicated DRB, transmit-link-dedicated DRB, receive-link-dedicated DRB.

[0128] In some embodiments, the unidirectional link DRB configuration information only contains information related to the unidirectional link.

[0129] In some embodiments, the DRB dedicated to the unidirectional link is associated with the unidirectional link-dedicated hybrid automatic repeat request (HARQ) entity.

[0130] In some embodiments, the unidirectional link-dedicated HARQ entity is associated with the physical resource set corresponding to the unidirectional link.

[0131] In some embodiments, the unidirectional link DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the unidirectional link, the identifier of the unidirectional link-dedicated HARQ entity, the physical resource set corresponding to the unidirectional link, the SDAP configuration information of the unidirectional link, the PDCP configuration information of the unidirectional link, the RLC configuration information of the unidirectional link, the MAC configuration information of the unidirectional link, the cell identifier of the unidirectional link, the primary cell identifier of the unidirectional link, the cell group identifier of the unidirectional link.

[0132] In some embodiments, the physical resource set includes at least one of the following: partial bandwidth (BWP) identifier, carrier identifier, cell identifier.

[0133] In some embodiments, the BWP is an active BWP.

[0134] In some embodiments, the processing unit 302 is specifically configured to perform at least one of the following: establish a DRB dedicated to a unidirectional link; modify a DRB dedicated to a unidirectional link; release a DRB dedicated to a unidirectional link.

[0135] In some embodiments, the receiving unit 301 is specifically configured to receive unidirectional link DRB configuration information from a second network element through a first control message, where the first control message includes at least one of the following: a radio resource control (RRC) message, a DRB configuration message.

[0136] Figure 13 The following shows a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure. As Figure 13 shown, the communication device 40 includes a sending unit 401. In some embodiments, the communication device 40 further includes a processing unit 402.

[0137] The communication device 40 may be the above-mentioned second network element or a chip in the second network element. When the communication device 40 is used to implement the functions of the second network element in the above embodiments, each unit is specifically configured to implement the following functions.

[0138] The sending unit 401 is configured to send unidirectional link DRB configuration information to a first network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to a unidirectional link.

[0139] In some embodiments, the processing unit 402 is configured to configure a DRB dedicated to a unidirectional link based on the unidirectional link DRB configuration information.

[0140] In some embodiments, the unidirectional link includes any one of the following: an uplink, a downlink, a transmission link, a reception link.

[0141] In some embodiments, the DRB dedicated to a unidirectional link includes any one of the following: an uplink-dedicated DRB, a downlink-dedicated DRB, a transmission-link-dedicated DRB, a reception-link-dedicated DRB.

[0142] In some embodiments, the unidirectional link DRB configuration information only includes information related to the unidirectional link.

[0143] In some embodiments, the DRB dedicated to a unidirectional link is associated with a hybrid automatic repeat request (HARQ) entity dedicated to the unidirectional link.

[0144] In some embodiments, the HARQ entity dedicated to a unidirectional link is associated with a set of physical resources corresponding to the unidirectional link.

[0145] In some embodiments, the unidirectional link DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the unidirectional link, the identifier of the HARQ entity dedicated to the unidirectional link, the physical resource set corresponding to the unidirectional link, the SDAP configuration information of the unidirectional link, the PDCP configuration information of the unidirectional link, the RLC configuration information of the unidirectional link, the MAC configuration information of the unidirectional link, the cell identifier of the unidirectional link, the primary cell identifier of the unidirectional link, and the cell group identifier of the unidirectional link.

[0146] In some embodiments, the physical resource set includes at least one of the following: the partial bandwidth BWP identifier, the carrier identifier, and the cell identifier.

[0147] In some embodiments, the BWP is an active BWP.

[0148] In some embodiments, the processing unit 402 is specifically configured to perform at least one of the following: establish a DRB dedicated to the unidirectional link; modify a DRB dedicated to the unidirectional link; release a DRB dedicated to the unidirectional link.

[0149] In some embodiments, the sending unit 401 is specifically configured to send the unidirectional link DRB configuration information through a first control message, where the first control message includes at least one of the following: an RRC message and a DRB configuration message.

[0150] It should be noted that Figure 12 and Figure 13 the units in Figure 12 and Figure 13 can also be referred to as modules. For example, the sending unit can be referred to as a sending module. Additionally, in the embodiments shown in

[0151] Figure 12 and Figure 13When each unit in [the above] is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present disclosure, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present disclosure. The storage media storing the computer software product include: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0152] In the case where the above communication device 30 or communication device 40 implements the functions of the above integrated module in the form of hardware, the embodiments of the present disclosure provide a structural schematic diagram of a communication device. As Figure 14 shown, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. Optionally, the communication device 50 may further include a memory 501.

[0153] The processor 502 can be used to implement or execute various exemplary logical blocks, modules, and circuits described in connection with the content disclosed in the present disclosure. The processor 502 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the content disclosed in the present disclosure. The processor 502 can also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0154] The communication interface 503 is used to connect to other devices through a communication network. The communication network can be an Ethernet, a wireless access network, a wireless local area network (WLAN), etc.

[0155] The memory 501 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or can also be an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0156] As a possible implementation, the memory 501 can exist independently of the processor 502. The memory 501 can be connected to the processor 502 through the bus 504 for storing instructions or program code. When the processor 502 calls and executes the instructions or program code stored in the memory 501, the data transmission method provided by the embodiments of the present disclosure can be implemented.

[0157] In another possible implementation, the memory 501 can also be integrated with the processor 502.

[0158] The bus 504 can be an extended industry standard architecture (EISA) bus, etc. The bus 504 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 14 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0159] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the base station or terminal is divided into different functional modules to complete all or part of the functions described above.

[0160] Embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions instructing relevant hardware. This program can be stored in the above computer-readable storage medium. When this program is executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be the memory in any of the foregoing embodiments. The above computer-readable storage medium can also be an external storage device of the above first network element or second network element, such as a plug-in hard disk equipped on the above first network element or second network element, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first network element or second network element and the external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above first network element or second network element. The above computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0161] Embodiments of the present disclosure also provide a computer program product. This computer product includes a computer program. When this computer program product runs on a computer, it causes the computer to execute any one of the data transmission methods provided in the above embodiments.

[0162] Although the present disclosure has been described in conjunction with various embodiments herein, however, in the process of implementing the claimed present disclosure, those skilled in the art can understand and implement other changes of the disclosed embodiments by viewing the drawings, the disclosure content, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality of cases. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0163] Although the present disclosure has been described in conjunction with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present disclosure. Accordingly, this specification and the drawings are merely exemplary descriptions of the present disclosure defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present disclosure. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these changes and modifications.

[0164] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A data transmission method, characterized in that, Applied to a first network element, the method includes: Receiving unidirectional link data radio bearer (DRB) configuration information from a second network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link; Configuring the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information.

2. The method according to claim 1, characterized in that, The unidirectional link includes any one of the following: uplink, downlink, transmit link, receive link.

3. The method according to claim 1 or 2, characterized in that, The DRB dedicated to the unidirectional link includes any one of the following: uplink-dedicated DRB, downlink-dedicated DRB, transmit-link-dedicated DRB, receive-link-dedicated DRB.

4. The method according to claim 1, characterized in that, The unidirectional link DRB configuration information only contains information related to the unidirectional link.

5. The method according to claim 1, characterized in that, The DRB dedicated to the unidirectional link is associated with a hybrid automatic repeat request (HARQ) entity dedicated to the unidirectional link.

6. The method according to claim 5, wherein The HARQ entity dedicated to the unidirectional link is associated with a set of physical resources corresponding to the unidirectional link.

7. The method according to claim 1, wherein The unidirectional link DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the unidirectional link, the identifier of the HARQ entity dedicated to the unidirectional link, the set of physical resources corresponding to the unidirectional link, the service data adaptation protocol (SDAP) configuration information of the unidirectional link, the packet data convergence protocol (PDCP) configuration information of the unidirectional link, the radio link control (RLC) configuration information of the unidirectional link, the media access control (MAC) configuration information of the unidirectional link, the cell identifier of the unidirectional link, the primary cell identifier of the unidirectional link, the cell group identifier of the unidirectional link.

8. The method according to claim 6 or 7, characterized in that, The set of physical resources includes at least one of the following: partial bandwidth (BWP) identifier, carrier identifier, cell identifier.

9. The method according to claim 8, characterized in that, The BWP is an active BWP.

10. The method according to claim 1, characterized in that, Configuring the DRB dedicated to the unidirectional link includes at least one of the following: Establishing the DRB dedicated to the unidirectional link; Modifying the DRB dedicated to the unidirectional link; Releasing the DRB dedicated to the unidirectional link.

11. The method according to claim 1, characterized in that Receiving the unidirectional link data radio bearer DRB configuration information from the second network element includes: Receiving the unidirectional link DRB configuration information from the second network element through a first control message, where the first control message includes at least one of the following: radio resource control (RRC) message, DRB configuration message.

12. A data transmission method, characterized in that, Applied to a second network element, the method includes: Sending unidirectional link DRB configuration information to a first network element, where the unidirectional link DRB configuration information is used to configure a DRB dedicated to the unidirectional link.

13. The method according to claim 12, characterized in that, The method further includes: Configuring the DRB dedicated to the unidirectional link based on the unidirectional link DRB configuration information.

14. The method according to claim 12 or 13, characterized in that, The unidirectional link includes any one of the following: uplink, downlink, transmit link, receive link.

15. The method according to claim 12 or 13, characterized in that, The DRB dedicated to the unidirectional link includes any one of the following: uplink-dedicated DRB, downlink-dedicated DRB, transmit-link-dedicated DRB, receive-link-dedicated DRB.

16. The method according to claim 12, wherein The unidirectional link DRB configuration information only contains information related to the unidirectional link.

17. The method according to claim 12, wherein The DRB dedicated to the unidirectional link is associated with a hybrid automatic repeat request (HARQ) entity dedicated to the unidirectional link.

18. The method according to claim 17, wherein The HARQ entity dedicated to the unidirectional link is associated with the set of physical resources corresponding to the unidirectional link.

19. The method according to claim 12, wherein The unidirectional link DRB configuration information includes at least one of the following: the identifier of the DRB dedicated to the unidirectional link, the identifier of the HARQ entity dedicated to the unidirectional link, the set of physical resources corresponding to the unidirectional link, the service data adaptation protocol (SDAP) configuration information of the unidirectional link, the packet data convergence protocol (PDCP) configuration information of the unidirectional link, the radio link control (RLC) configuration information of the unidirectional link, the media access control (MAC) configuration information of the unidirectional link, the cell identifier of the unidirectional link, the primary cell identifier of the unidirectional link, and the cell group identifier of the unidirectional link.

20. The method according to claim 18 or 19, characterized in that, The set of physical resources includes at least one of the following: partial bandwidth (BWP) identifier, carrier identifier, and cell identifier.

21. The method according to claim 20, wherein, The BWP is an active BWP.

22. The method according to claim 13, characterized in that, Configuring the DRB dedicated to the unidirectional link includes at least one of the following: Establishing the DRB dedicated to the unidirectional link; Modifying the DRB dedicated to the unidirectional link; Releasing the DRB dedicated to the unidirectional link.

23. The method according to claim 12, wherein Sending the unidirectional link DRB configuration information to the first network element includes: Sending the unidirectional link DRB configuration information to the first network element through a first control message, where the first control message includes at least one of the following: RRC message and DRB configuration message.

24. A communication device, characterized in that, Includes: A memory and a processor; The memory and the processor are coupled; The memory is used to store instructions executable by the processor; When the processor executes the instructions, it executes the method according to any one of claims 1-11, or the method according to any one of claims 12-23.

25. A computer-readable storage medium, characterized in that, Computer instructions are stored on the computer-readable storage medium. When the computer instructions run on the computer, the computer is caused to execute the method according to any one of claims 1-11, or the method according to any one of claims 12-23.

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