WO2023221984A1 - Data transmission method and apparatus, and storage medium - Google Patents

Abstract

A data transmission method and apparatus, and a storage medium. The method comprises: a first function of an SDAP layer maps, according to a QoS guarantee requirement corresponding to an RB and a QoS requirement of a first QoS flow, a first data packet received from the first QoS flow to a first public RB and transmits same to a second function of an MAC layer; and/or the first function of the SDAP layer receives, from a second public RB, a second data packet transmitted by the second function of the MAC layer, and according to a terminal identifier of a first terminal and a QoS flow identifier of a second QoS flow carried by the second data packet, maps the second data packet to the second QoS flow of the first terminal for transmission, wherein at least one public RB is established between the SDAP layer and the MAC layer, the public RB is an RB shared by at least one terminal, and each public RB corresponds to a QoS guarantee requirement of data transmission.

Description

Data transmission method, device and storage medium

Cross-references to related applications

This application claims priority from Chinese Patent Application No. 202210528202.8 filed in China on May 16, 2022, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of mobile communication technology, and specifically to a data transmission method, device and storage medium.

Background technique

The design goals of Lite Network and Soft Resilient Network for the next generation of mobile communications require the design of protocol stack functions for Service Oriented (SO).

The functions of the Service Data Adaptation Protocol (SDAP) protocol of related technologies are shown in Figure 1. SDAP is responsible for the quality of service (Quality of Service, QoS) flow (QoS flow) and data radio bearer (Data Radio Bearer, DRB ) mapping and demapping, as well as optional reflective mapping function (Reflective QoS flow to DRB mapping).

In related technologies, each protocol layer transmits data strictly in accordance with the upper and lower layer constraint relationships of L3/L2/L1, and is configured in units of user equipment (User Equipment, UE). Each radio bearer (Radio Bearer, RB) belongs to and only one UE. RB is the bearer between the two protocol layers of SDAP and Packet Data Convergence Protocol (PDCP). SDAP and Media Access Control (Media Access Control, MAC) layer cannot be directly connected, as shown in Figure 2 and Figure 3 The fifth generation mobile communication (the ^5th Generation, 5G) protocol stack solution shown.

In the sixth generation of mobile communications (the ^6th Generation, 6G), as the types of information that need to be transmitted increase (the 6G network is an intelligent endogenous network and needs to generate measurement information according to its own operation), wireless-oriented QoS requirements are established. RB to meet transmission needs. At the same time, in order to eliminate the RB switching process when the UE moves, the RB needs to be redefined, which requires the protocol stack in 6G to be specific. It has the flexibility to select functions on demand, have a unified protocol data unit (PDU) format with low redundancy overhead, and has no or light connections between protocol layers.

At present, the function of the SDAP protocol sublayer in the 5G protocol stack is still connection-oriented. That is, after the UE accesses the base station, it establishes the user's SDAP protocol function (RRC signaling) through Radio Resource Control (RRC) signaling. The corresponding SDAP function is configured through the establishment of RB), and the RB belonging to the UE. Each RB belongs to and only belongs to one UE. When the UE moves and switches, this connection-oriented (RRC Connection) approach cannot meet the flexibility needs of multiple scenarios and multiple services.

Contents of the invention

At least one embodiment of the present disclosure provides a data transmission method, device and storage medium, which can realize service-purpose data transmission between the SDAP layer and the MAC layer through the RB between the SDAP layer and the MAC layer.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In a first aspect, an embodiment of the present disclosure provides a data transmission method, including:

The first function of the service data adaptation protocol SDAP layer maps the first data packet received from the first QoS flow to the first common The second function sent to the media access control MAC layer on the RB;

and / or,

The first function of the SDAP layer receives the second data packet sent by the second function of the MAC layer from the second public RB, and based on the terminal identification of the first terminal and the QoS flow identification of the second QoS flow carried in the second data packet, Map the second data packet to the second QoS flow of the first terminal for sending;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

Optionally, based on the quality of service QoS guarantee requirements corresponding to the radio bearer RB and the QoS requirements of the first QoS flow, the first data packet received from the first QoS flow is mapped to the first public RB and sent to The second function of the media access control MAC layer includes:

The first function of the SDAP layer is based on the QoS guarantee requirements corresponding to each public RB and the first QoS requirements of the QoS flow, determining the first public RB that matches the QoS requirements of the first QoS flow;

The first data packet received on the first QoS flow is sent to the second function of the MAC layer through the first common RB.

Optionally, based on the quality of service QoS guarantee requirements corresponding to the radio bearer RB and the QoS requirements of the first QoS flow, the first data packet received from the first QoS flow is mapped to the first public RB and sent to The second function of the media access control MAC layer includes:

The first function of the SDAP layer receives a first data packet from the first QoS flow and obtains the QoS requirement of the first data packet;

According to the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the first data packet, determine the first public RB that matches the QoS requirement of the first data packet;

The first data packet is sent to the second function of the MAC layer through the first common RB.

Optionally, the identifier (ID) of the public RB is: an index of the QoS guarantee requirement corresponding to the public RB.

Optionally, the first function of the SDAP layer and the second function of the MAC layer are directly connected through the common RB.

Optionally, the terminal-side public RB is established between the first function of the SDAP layer of the terminal and the second function of the MAC layer, and is established between the first function of the SDAP layer and the second function of the MAC layer of the network device. The terminal-side public RB is consistent with the network-side public RB required for QoS guarantee.

Optionally, any common RB established between the first function of the SDAP layer and the second function of the MAC layer of the network device is used to transmit data packets of at least one QoS flow, and the at least one QoS flow is one or more The QoS flow of a terminal, and the QoS requirement of the at least one QoS flow matches the QoS guarantee requirement of any public RB.

Optionally, the common RB established between the first function of the SDAP layer and the second function of the MAC layer is a connection-oriented bearer or a connectionless bearer, where the connectionless RB refers to the SDAP layer. There is no connecting entity between the first function of the MAC layer and the second function of the MAC layer.

Optionally, the transmission direction of the common RB established between the first function of the SDAP layer and the second function of the MAC layer includes unidirectional transmission or bidirectional transmission.

Optionally, the data packet sent by the first function of the SDAP layer to the second function of the MAC layer carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS to which the data packet belongs. The QoS flow identifier of the flow, the terminal identifier corresponding to the data packet, and SDAP PDU;

The data packet received by the first function of the SDAP layer from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the QoS flow identification of the QoS flow to which the data packet belongs. The terminal identification and SDAP PDU corresponding to the data packet.

In a second aspect, embodiments of the present disclosure provide a data transmission method, including:

The second function of the MAC layer receives the first data packet sent by the first function of the SDAP layer from the first public RB, and determines the first data packet or the QoS guarantee requirement corresponding to the first public RB and the public RB. QoS requirements of the first QoS flow, scheduling of data packets or QoS flow according to the QoS requirements of the first data packet, where the first QoS flow is the QoS flow to which the first data packet belongs;

and / or,

The second function of the MAC layer determines the second public RB that matches the QoS requirement of the second data packet based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the second data packet. The packet is mapped to the second public RB and sent to the first function of the SDAP layer;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

Optionally, before determining the second public RB that matches the QoS requirement of the second data packet, the method further includes:

The second function of the MAC layer determines the QoS requirement of the second data packet according to the QoS rule.

Optionally, the identification ID of the public RB is: an index of the QoS guarantee requirement corresponding to the public RB.

Optionally, the second function of the MAC layer and the first function of the SDAP layer are directly connected through the common RB.

Optionally, the terminal-side public RB established between the first function of the SDAP layer of the terminal and the second function of the MAC layer is between the first function of the SDAP layer and the second function of the MAC layer of the network device. A network-side public RB with QoS guarantee requirements consistent with the terminal-side public RB is established.

Optionally, any common RB established between the second function of the MAC layer of the network device and the first function of the SDAP layer is used to transmit data packets of at least one QoS flow, and the at least one QoS flow is one or more The QoS flow of a terminal, and the QoS requirement of the at least one QoS flow matches the QoS guarantee requirement of any public RB.

Optionally, the common RB established between the second function of the MAC layer and the first function of the SDAP layer is a connection-oriented bearer or a connectionless bearer, where the connectionless RB refers to the SDAP layer. There is no connecting entity between the first function of the MAC layer and the second function of the MAC layer.

Optionally, the transmission direction of the common RB established between the second function of the MAC layer and the first function of the SDAP layer includes unidirectional transmission or bidirectional transmission.

Optionally, the data packet received by the second function of the MAC layer from the RB carries at least one of the following information: the RB identification of the public RB to which the data packet is mapped, and the QoS of the QoS flow to which the data packet belongs. Flow identification, terminal identification corresponding to the data packet, SDAP PDU;

The data packet sent by the second function of the MAC layer to the first function of the SDAP layer carries at least one of the following information: the RB identifier of the public RB mapped by the data packet, the QoS flow of the QoS flow to which the data packet belongs. Identity, terminal identification corresponding to the data packet, SDAP PDU.

In the third aspect, embodiments of the present disclosure provide a data transmission device applied to the first function of the SDAP layer, including: a transceiver and a processor:

The transceiver is used to send and receive data under the control of the processor;

The processor is configured to map the first data packet received from the first QoS flow to the first data packet sent to the MAC layer on the first common RB according to the QoS guarantee requirements corresponding to the RB and the QoS requirements of the first QoS flow. The second function; and/or, receiving the second data packet sent by the second function of the MAC layer from the second public RB, based on the terminal identification of the first terminal carried in the second data packet and the QoS flow of the second QoS flow. identification, mapping the second data packet to the second QoS flow of the first terminal for sending;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

In the fourth aspect, embodiments of the present disclosure provide a data transmission device, applied to the first function of the SDAP layer, including: a processor, a memory and data stored on the memory and available on the processor. A program running on the processor, which when executed by the processor, implements the steps of the method described in the first aspect.

In the fifth aspect, embodiments of the present disclosure provide a data transmission device applied to the second function of the MAC layer, including: a transceiver and a processor:

The transceiver is used to send and receive data under the control of the processor;

The processor is configured to receive the first data packet sent by the first function of the SDAP layer from the first public RB, and determine the first data packet according to the first public RB and the QoS guarantee requirements corresponding to the public RB. Or the QoS requirement of the first QoS flow, the scheduling of the data packet or the scheduling of the QoS flow is performed according to the QoS requirement of the first data packet, and the first QoS flow is the QoS flow to which the first data packet belongs; and/or, According to the QoS guarantee requirements corresponding to each public RB and the QoS requirements of the second data packet, determine the second public RB that matches the QoS requirements of the second data packet and map the second data packet to the second public RB. The first function sent to the SDAP layer on the RB;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

In the sixth aspect, embodiments of the present disclosure provide a data transmission device applied to the second function of the MAC layer, including: a processor, a memory, and a program stored on the memory and executable on the processor, the The steps of the method described in the second aspect are implemented when the program is executed by the processor.

In a seventh aspect, embodiments of the present disclosure provide a computer-readable storage medium. A program is stored on the computer-readable storage medium. When the program is executed by a processor, the steps of the above method are implemented.

Compared with related technologies, the data transmission method, device and storage medium provided by the embodiments of the present disclosure realize service-purpose data transmission between the SDAP layer and the MAC layer through the common RB between the SDAP layer and the MAC layer. This enables flexible functions under a simple network. In addition, embodiments of the present disclosure can also realize flexible selection of on-demand protocol functions, reduce RRC signaling overhead, and implement a service-oriented radio access network (Radio Access Network, RAN) protocol stack solution. In addition, since the public RB is no longer dedicated to the UE, embodiments of the present disclosure can also avoid the RB switching process when the UE moves.

Description of the drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the disclosure. Also throughout the drawings, the same reference characters are used to designate the same components. In the attached picture:

Figures 1 to 3 are schematic diagrams of the 5G protocol architecture of related technologies;

Figure 4 is a schematic diagram of an application scenario according to an embodiment of the present disclosure;

Figure 5 is a schematic flow chart of a data transmission method according to an embodiment of the present disclosure;

Figure 6 is a schematic flow chart of a data transmission method according to an embodiment of the present disclosure;

Figure 7 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure;

Figure 8 is a schematic structural diagram of a data transmission device according to another embodiment of the present disclosure;

Figure 9 is a schematic structural diagram of a data transmission device according to another embodiment of the present disclosure;

Figure 10 is a schematic structural diagram of a data transmission device according to another embodiment of the present disclosure;

Figure 11 is a schematic structural diagram of a data transmission device according to another embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a data transmission device according to another embodiment of the present disclosure.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to fully convey the scope of the disclosure to those skilled in the art.

The terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that data so used are interchangeable under appropriate circumstances so that the embodiments of the disclosure described herein, for example, can be practiced in sequences other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus. In the description and claims, “and/or” indicates the connected objects. At least one of them.

The following description provides examples and does not limit the scope, applicability, or configurations set forth in the claims. Changes may be made in the function and arrangement of the elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

As shown in Figures 2 to 3, a traditional RB is bound to a UE and carries one or more QoS flows of the UE. The embodiment of the present disclosure introduces a new RB type in addition to the traditional RB type. The RB according to the embodiment of the present disclosure will be described below.

The embodiment of the present disclosure provides a multi-user DRB solution for wireless QoS. As shown in Figure 4, the SDAP and MAC layers are connected through this new RB (DRB with QoS). After using this new RB, SDAP can support the mapping and demapping functions of multiple QoS flows of multiple users to different RBs. In Figure 4, QoS flows are managed on a UE basis and then mapped to different RBs.

The novel RB type provided by the embodiments of the present disclosure has one or more of the following features:

1) At least one common RB is established between the SDAP layer and the MAC layer of the network device or terminal. This RB is shared by at least one terminal, rather than a dedicated RB for a certain terminal. Therefore, the RB in the embodiment of the present disclosure can also be called Be a public RB. Each public RB corresponds to a QoS guarantee requirement for data transmission, and the public RB is used to transmit data whose QoS requirements match the QoS guarantee requirement corresponding to the public RB.

The public RB can transmit data of any terminal and is not exclusive to any terminal. That is to say, any common RB established between the SDAP layer and the MAC layer of the network device is used to transmit data packets of at least one QoS flow. The at least one QoS flow is the QoS flow of one or more terminals, and the at least one QoS flow is the QoS flow of one or more terminals. The QoS requirement of at least one QoS flow matches the QoS guarantee requirement of any public RB. For the terminal, any public RB established between the terminal's SDAP layer and MAC layer is not specially established for the terminal, but is established separately for various QoS guarantee requirements. Even if a public RB on a terminal side Is used to transmit data from this terminal.

The QoS guarantee requirements in the embodiments of the present disclosure may specifically refer to wireless QoS guarantee requirements, that is, QoS requirements that must be met during transmission at the wireless transport network layer (Transport Network Layer, TNL) layer. Embodiments of the present disclosure can define the public RB for wireless QoS guarantee requirements, that is, the public RB is established based on wireless QoS guarantee requirements as a unit. In this way, the indexes of different types of QoS guarantee requirements can be used as the identification ID of the public RB. That is to say, the ID of the public RB is: the index of the QoS guarantee requirement corresponding to the public RB.

In this disclosed embodiment, different types of QoS guarantee requirements can also be defined as different QoS levels (wireless QoS levels). In this way, the index of the QoS level can be used as the ID of the public RB, and each public RB represents the relationship between SDAP and MAC. A type of QoS guarantee requirement (or a wireless QoS level) during data transmission between devices.

In the embodiment of the present disclosure, the QoS guarantee requirement for data transmission corresponding to each public RB refers to the QoS index of wireless transmission that the public RB can satisfy. Specifically, the QoS guarantee requirements corresponding to each public RB may be different, that is, different public RBs correspond to different QoS guarantee requirements. Of course, in this embodiment of the present disclosure, the QoS guarantees corresponding to different public RBs may also be the same, and this embodiment of the present disclosure does not specifically limit this.

2) The first function of the SDAP layer and the second function of the MAC layer are directly connected through a common RB.

3) The uplink or downlink of the terminal and network sides define public RBs according to consistent QoS guarantee requirements. That is to say, for any terminal-side public RB established between the first function of the SDAP layer and the second function of the MAC layer on the terminal side, the first function of the SDAP layer and the second function of the MAC layer of the network device A network-side public RB with QoS guarantee requirements consistent with any terminal-side public RB is established therebetween. The consistent QoS guarantee requirements refer to that the QoS guarantee requirements of the public RB on the network side and the public RB on the terminal side are consistent and can meet the same QoS requirements.

5) The common RB established between the first function of the SDAP layer and the second function of the MAC layer may be a connection-oriented bearer or a connectionless bearer. Connection-oriented means that an RB entity is established between SDAP and MAC. Connectionless means that there is no connection entity between SDAP and MAC. The public RB only represents the QoS guarantee requirements that need to be met when data is transmitted between SDAP and MAC. The QoS guarantee requirements represented by the public RB are determined through the platform or between SDAP and MAC. The transmission entity realizes the transmission network connected between them. The platform refers to a function or entity installed between SDAP and MAC to support the operation of SDAP and MAC. The above-mentioned transmission network may refer to the connection between SDAP and MAC through a deterministic wired network, and the wired network is responsible for realizing the public RB representation. QoS guarantee requirements.

6) The transmission direction of the common RB established between the first function of the SDAP layer and the second function of the MAC layer includes unidirectional transmission or bidirectional transmission. That is to say, the public RB can correspond to a single direction, such as only transmitting data from SDAP to MAC, or only transmitting data from MAC to SDAP. In this case, it means representing the QoS guarantee requirements of one direction. In the embodiment of the present disclosure, each public RB can be bidirectional, that is, it can transmit data exchanged between the SDAP and MAC layers at the same time. At this time, it means that the public RB represents the QoS guarantee requirements in both directions.

In addition, it should be noted that the first function described in the embodiment of the present disclosure is a function of the SDAP layer, and the second function is a function of the MAC layer. The first function and the second function exist on the network device or terminal side. , can also be called the first functional entity and the second functional entity, or the first functional unit and the second functional unit.

Based on the above-mentioned common RB, the embodiment of the present disclosure also provides a data transmission method, which will be described separately below.

Please refer to Figure 5. A data transmission method provided by an embodiment of the present disclosure is applied to the first function of the SDAP layer. The first function of the SDAP layer is a function of the SDAP sublayer of a communication device. The communication device It can be a network device or terminal, as shown in Figure 5. The method includes:

Step 51: The first function of the SDAP layer maps the first data packet received from the first QoS flow to the first public RB according to the QoS guarantee requirements corresponding to the public RB and the QoS requirements of the first QoS flow. The second function of the media access control MAC layer; and/or the first function of the SDAP layer receives the second data packet sent by the second function of the MAC layer from the second public RB, and according to the second data packet carried by the second data packet The terminal identifier of the first terminal and the QoS flow identifier of the second QoS flow map the second data packet to the second QoS flow of the first terminal for transmission.

Here, at least one common RB is established between the SDAP layer and the MAC layer. The common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

Through the above steps, the embodiment of the present disclosure implements service-purpose data transmission between the SDAP layer and the MAC layer through the common RB between the SDAP layer and the MAC layer, thereby realizing flexible functions under a simplified network.

Specifically, in step 51, the QoS guarantee requirements corresponding to the public RB and the first QoS flow QoS requirements, mapping the first data packet received from the first QoS flow to the second function sent to the MAC layer on the first public RB, which can be executed by the F1 module in Figure 4; from step 51 The second public RB receives the second data packet sent by the second function of the MAC layer, and maps the second data packet to Sending on the second QoS flow of the first terminal can be performed by the F2 module in Figure 4. That is, the first function can be implemented by the F1 module and the F2 module.

In the embodiment of the present disclosure, when the first function of the SDAP layer sends the data of each QoS flow of each UE to the MAC layer, the data packets on each QoS flow (in QoS flow units) can be sent to the MAC layer according to the QoS QoS requirements of the flow and QoS mapping rules (i.e., QoS guarantee requirements corresponding to the RB), and select the RB that can carry each QoS flow. At this time, in the above-mentioned step 51, the first function of the SDAP layer can determine the QoS requirements that match the QoS requirements of the first QoS flow based on the QoS guarantee requirements corresponding to each public RB and the QoS requirements of the first QoS flow. First common RB; sending the first data packet received on the first QoS flow to the second function of the MAC layer through the first common RB.

In the embodiment of the present disclosure, the above mapping processing can also be performed in units of data packets. At this time, when the first function of the SDAP layer sends the data of each QoS flow of each UE to the MAC layer, it can also For data packets on the QoS flow (i.e., Service Data Unit (SDU)), the RB that can carry each data packet is selected according to the QoS requirements of the data packet and the QoS mapping rules (i.e., the QoS guarantee requirements corresponding to the RB). At this time, in the above step 51, the first function of the SDAP layer can receive the first data packet from the first QoS flow and obtain the QoS requirements of the first data packet; then, according to the QoS corresponding to each public RB guarantee requirements and the QoS requirement of the first data packet, determine the first public RB that matches the QoS requirement of the first data packet; send the first data packet to the MAC through the first public RB The second function of the layer.

In the above step 51, the embodiment of the present disclosure also implements the function of parsing and routing SDAP PDU to QoS flows of different users (Disassembling PDU to route to UEs' QoS flows). As shown in Figure 4, after receiving the data packet from each public RB, the first function of the SDAP layer parses the data packet according to the UE identification ID and QoS flow identification carried in the data packet and passes the corresponding (with QoS flow ID indicates) QoS flow is sent to the upper layer. The upper layer refers to the upper layer function of the SDAP layer, specifically the user plane function of layer 3 and/or the user plane function of the non-access layer (User Plane Function, UPF), etc.

In addition, in the embodiment of the present disclosure, the data packet sent by the first function of the SDAP layer to the second function of the MAC layer carries at least one of the following information: the RB identifier of the public RB mapped by the data packet, the data The QoS flow ID of the QoS flow to which the packet belongs, the terminal ID corresponding to the data packet, and the SDAP PDU. Among them, SDAP PDU is the PDU formed by SDAP, that is, the SDU of MAC. In this disclosed embodiment, the MAC PDU may carry an RB identifier or a QoS flow identifier.

In the embodiment of the present disclosure, the data packet received by the first function of the SDAP layer from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow to which the data packet belongs The QoS flow identifier, the terminal identifier corresponding to the data packet, and the SDAP PDU (that is, the SDU of the MAC). Specifically, when the QoS flow identifier is carried in the MAC PDU, the data packet received by the first function of the SDAP layer from the RB can carry the QoS flow identifier.

Based on the above method, embodiments of the present disclosure can realize flexible selection of on-demand protocol functions, reduce RRC signaling overhead, and implement a Service Oriented (SO) RAN protocol stack solution. In addition, since the RB is no longer dedicated to the UE, embodiments of the present disclosure can also avoid the RB switching process when the UE moves.

Optionally, in this embodiment of the present disclosure, the identification ID of the public RB is: the index of the QoS guarantee requirement corresponding to the public RB. In addition, the first function of the SDAP layer and the second function of the MAC layer may be directly connected through the common RB.

In addition, in the embodiment of the present disclosure, the terminal-side public RB established between the first function of the SDAP layer of the terminal and the second function of the MAC layer is between the first function of the SDAP layer and the second function of the MAC layer of the network device. A network-side public RB with QoS guarantee requirements consistent with the terminal-side public RB is established.

Optionally, any common RB established between the first function of the SDAP layer and the second function of the MAC layer of the network device in this embodiment of the present disclosure can be used to transmit data packets of at least one QoS flow, and the at least one The QoS flow is a QoS flow of one or more terminals, and the QoS requirement of the at least one QoS flow matches the QoS guarantee requirement of any public RB. In other words, the RB is no longer dedicated to a certain UE.

Please refer to Figure 6. A data transmission method provided by an embodiment of the present disclosure is applied to the second function of the MAC layer. The second function of the MAC layer is a function of the MAC sublayer of a certain communication device. The communication device may be a network device or a terminal, as shown in Figure 6. The method includes:

Step 61: The second function of the MAC layer receives the first data packet sent by the first function of the SDAP layer from the first public RB, and determines the first data packet according to the first public RB and the QoS guarantee requirements corresponding to the public RB. and/ Or, the second function of the MAC layer determines the second public RB that matches the QoS requirement of the second data packet based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the second data packet. The second data packet is mapped to the second public RB and sent to the first function of the SDAP layer.

Here, at least one common RB is established between the second function of the MAC layer and the first function of the SDAP layer, and each common RB corresponds to data between the second function of the MAC layer and the first function of the SDAP layer. A QoS guarantee requirement for transmission.

Through the above steps, the embodiment of the present disclosure implements the QoS-based RB scheduling (Scheduling DRBs based on their QoS for different UEs) function in the transmission direction of the MAC layer. As shown in Figure 4, the MAC can obtain the QoS guarantee requirements required by the data packet or QoS flow based on the RB identification of the data packet, and schedule the data packet or QoS flow based on the QoS guarantee requirements, and then the MAC establishes the corresponding terminal in The MAC PDU sent this time.

Specifically, step 61 receives the first data packet sent by the first function of the SDAP layer from the first public RB, and determines the first data packet according to the first public RB and the QoS guarantee requirements corresponding to the public RB. Or the QoS requirement of the first QoS flow, the scheduling of the data packet or the scheduling of the QoS flow is performed according to the QoS requirement of the first data packet. The first QoS flow is the QoS flow to which the first data packet belongs, as shown in Figure 4 The F3 module in step 61 is executed; in step 61, according to the QoS guarantee requirements corresponding to each public RB and the QoS requirements of the second data packet, determine the second public RB that matches the QoS requirements of the second data packet. The first function of mapping the second data packet to the second public RB and sending it to the SDAP layer can be executed by the F4 module in Figure 4 . That is, the second function can be implemented by the F3 module and the F4 module.

Based on the above steps, the embodiment of the present disclosure implements the function of sending MAC SDU based on QoS Rules with UEs'ID to the SDAP based on QoS rules in the receiving direction of the MAC layer. After MAC receives the MAC PDU, it parses to get the MAC SDU, and then presses According to the QoS rules of MAC sending data to SDAP, the appropriate QoS corresponding RB is selected for each MAC SDU, and then sent to SDAP, thereby adding the MAC's transmission capability between MAC and SDAP according to the QoS requirements of each SDU.

Based on the above method, the embodiment of the present disclosure implements data transmission for service purposes between the MAC layer and the SDAP layer, thereby realizing flexible functions under a simplified network.

Optionally, before determining the second public RB that matches the QoS requirement of the second data packet, the second function of the MAC layer may also determine the QoS rule according to the QoS rule (for example, the QoS rule for the MAC to send data to the SDAP). , determine the QoS requirements of the second data packet.

Optionally, in this embodiment of the disclosure, the data packet received by the second function of the MAC layer from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the The QoS flow ID of the QoS flow to which it belongs, the terminal ID corresponding to the data packet, and the SDAP PDU (the PDU formed by SDAP, that is, the SDU of the MAC). Among them, SDAP PDU is the PDU formed by SDAP, that is, the SDU of MAC. In this disclosed embodiment, the MAC PDU may carry an RB identifier or a QoS flow identifier.

In this embodiment of the present disclosure, the data packet sent by the second function of the MAC layer to the first function of the SDAP layer carries at least one of the following information: the RB identifier of the public RB to which the data packet is mapped, the RB identifier to which the data packet belongs. The QoS flow ID of the QoS flow, the terminal ID corresponding to the data packet, and the SDAP PDU (that is, the SDU of the MAC). Specifically, when the QoS flow identifier is carried in the MAC PDU, the data packet sent by the second function of the MAC layer to the first function of the SDAP layer can carry the QoS flow identifier.

Various methods of embodiments of the present disclosure have been introduced above. The apparatus for implementing the above method will be further provided below.

Please refer to Figure 7. The embodiment of the present disclosure also provides a data transmission device 700, which is applied to the first function of the SDAP layer. As shown in Figure 7, the device includes:

The first processing module 701 is configured to map the first data packet received from the first QoS flow to the first common RB and send it to the media interface according to the QoS guarantee requirements corresponding to the RB and the QoS requirements of the first QoS flow. Enter the second function of controlling the MAC layer;

and / or,

The second processing module 702 is configured to receive the second data packet sent by the second function of the MAC layer from the second public RB, according to the terminal identification of the first terminal and the second QoS flow carried by the second data packet. The QoS flow identifier maps the second data packet to the second QoS flow of the first terminal for sending;

Wherein, at least one common RB is established between the first function of the SDAP layer and the second function of the MAC layer, and each common RB corresponds to data between the first function of the SDAP layer and the second function of the MAC layer. A QoS guarantee requirement for transmission.

Based on the above first function of the SDAP layer, the embodiment of the present disclosure implements service-purpose data transmission between the SDAP layer and the MAC layer through the common RB between the SDAP layer and the MAC layer, thereby realizing a simple network. Flexible functions.

Optionally, the first processing module 701 is also configured to determine the first public QoS requirement that matches the QoS requirement of the first QoS flow based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the first QoS flow. RB; sending the first data packet received on the first QoS flow to the second function of the MAC layer through the first public RB.

Optionally, the first processing module 701 is also configured to receive a first data packet from the first QoS flow and obtain the QoS requirements of the first data packet; according to the QoS guarantee requirements corresponding to each public RB and According to the QoS requirement of the first data packet, determine the first public RB that matches the QoS requirement of the first data packet; send the first data packet to the third MAC layer of the MAC layer through the first public RB. Second function.

Optionally, the data packet sent by the first function of the SDAP layer to the second function of the MAC layer carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS to which the data packet belongs. The QoS flow identifier of the flow, the terminal identifier corresponding to the data packet, and SDAP PDU;

The data packet received by the first function of the SDAP layer from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the QoS flow identification of the QoS flow to which the data packet belongs. The terminal identification and SDAP PDU corresponding to the data packet.

For a more detailed description of the common RB established between the first function of the SDAP layer and the second function of the MAC layer, please refer to the above description, which will not be described again here.

It should be noted that the equipment in this embodiment is a device corresponding to the method applied to the first function of the SDAP layer. The implementation methods in each of the above embodiments are applicable to the embodiment of the device, and the same can be achieved. technical effects. The above-mentioned devices provided by the embodiments of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects in this embodiment that are the same as those in the method embodiments will not be detailed here. Repeat.

Please refer to Figure 8. The embodiment of the present disclosure also provides a data transmission device 800, which is applied to the first function of the SDAP layer. The device includes: a transceiver 801 and a processor 802;

The transceiver 801 is used to send and receive data under the control of the processor 802;

The processor 802 is configured to map the first data packet received from the first QoS flow to the first common RB and send it to the MAC layer according to the QoS guarantee requirements corresponding to the RB and the QoS requirements of the first QoS flow. The second function of The flow identifier maps the second data packet to the second QoS flow of the first terminal for sending;

Wherein, at least one common RB is established between the first function of the SDAP layer and the second function of the MAC layer, and each common RB corresponds to data between the first function of the SDAP layer and the second function of the MAC layer. A QoS guarantee requirement for transmission.

Optionally, the processor 802 is also configured to determine the first public RB that matches the QoS requirement of the first QoS flow based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the first QoS flow; The first data packet received on the first QoS flow is sent to the second function of the MAC layer through the first common RB.

Optionally, the processor 802 is also configured to use the first function of the SDAP layer to receive the first data packet from the first QoS flow and obtain the QoS requirements of the first data packet; according to each public RB Corresponding QoS guarantee requirements and QoS requirements of the first data packet, determine the first public RB that matches the QoS requirement of the first data packet; send the first data packet to The second function of the MAC layer.

Optionally, the data packet sent by the first function of the SDAP layer to the second function of the MAC layer carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS to which the data packet belongs. The QoS flow identifier of the flow, the terminal identifier corresponding to the data packet, and SDAP PDU;

The data packet received by the first function of the SDAP layer from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the QoS flow identification of the QoS flow to which the data packet belongs. The terminal identification and SDAP PDU corresponding to the data packet.

For a more detailed description of the common RB established between the first function of the SDAP layer and the second function of the MAC layer, please refer to the above description, which will not be described again here.

It should be noted that the device in this embodiment is the same as the above first function applied to the SDAP layer. For the device corresponding to the method on the side, the implementation methods in each of the above embodiments are applicable to the embodiment of the first function of the SDAP layer, and the same technical effect can be achieved. The above-mentioned first function of the SDAP layer provided by the embodiment of the present disclosure can realize all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts in this embodiment that are the same as those in the method embodiment will no longer be discussed here. and beneficial effects are described in detail.

Referring to Figure 9, an embodiment of the present disclosure also provides a data transmission device 900, which is applied to the second function of the MAC layer. The device includes:

The first processing module 901 is configured to receive the first data packet sent by the first function of the SDAP layer from the first public RB, and determine the first data according to the first public RB and the QoS guarantee requirements corresponding to the public RB. QoS requirements of the packet or first QoS flow, scheduling of data packets or QoS flow according to the QoS requirements of the first data packet, where the first QoS flow is the QoS flow to which the first data packet belongs;

and / or,

The second processing module 902 is configured to determine the second public RB that matches the QoS requirement of the second data packet based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the second data packet. The second data packet is mapped to the second public RB and sent to the first function of the SDAP layer;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

Based on the above second function of the MAC layer, the embodiment of the present disclosure realizes data transmission for service purposes between the SDAP layer and the MAC layer through the common RB between the SDAP layer and the MAC layer, thereby realizing the simplest network. Flexible functions.

Optionally, the second function of the MAC layer also includes:

The first determination module is configured to determine the QoS requirement of the second data packet according to the QoS rule before determining the second public RB that matches the QoS requirement of the second data packet.

Optionally, the data packet received by the second function of the MAC layer from the RB carries at least one of the following information: the RB identification of the public RB to which the data packet is mapped, and the QoS of the QoS flow to which the data packet belongs. Flow identification, terminal identification corresponding to the data packet, SDAP PDU;

The data packet sent by the second function of the MAC layer to the first function of the SDAP layer carries the At least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the terminal identification corresponding to the data packet, and the SDAP PDU.

For a more detailed description of the common RB established between the first function of the SDAP layer and the second function of the MAC layer, please refer to the above description, which will not be described again here.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the second functional side of the MAC layer. The implementation methods in each of the above embodiments are applicable to the embodiment of the second function of the MAC layer. , the same technical effect can be achieved. The above-mentioned second function of the MAC layer provided by the embodiment of the present disclosure can realize all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts in this embodiment that are the same as those in the method embodiment will no longer be discussed here. and beneficial effects are described in detail.

Please refer to Figure 10. The embodiment of the present disclosure also provides a data transmission device 1000, which is applied to the second function of the MAC layer. The device includes: a transceiver 1001 and a processor 1002;

The transceiver 1001 is used to send and receive data under the control of the processor;

The processor 1002 is configured to receive the first data packet sent by the first function of the SDAP layer from the first public RB, and determine the first data packet according to the first public RB and the QoS guarantee requirements corresponding to the public RB. QoS requirements of the packet or first QoS flow, scheduling of data packets or QoS flow is performed according to the QoS requirements of the first data packet, and the first QoS flow is the QoS flow to which the first data packet belongs; and/or , according to the QoS guarantee requirements corresponding to each public RB and the QoS requirements of the second data packet, determine the second public RB that matches the QoS requirements of the second data packet, and map the second data packet to the second The first function sent to the SDAP layer on the public RB;

Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission.

Optionally, the processor 1002 is further configured to determine the QoS requirement of the second data packet according to the QoS rule before determining the second public RB that matches the QoS requirement of the second data packet.

Optionally, the data packet received by the second function of the MAC layer from the RB carries at least one of the following information: the RB identification of the public RB to which the data packet is mapped, and the QoS of the QoS flow to which the data packet belongs. Flow ID, terminal ID corresponding to the data packet, SDAP PDU;

The data packet sent by the second function of the MAC layer to the first function of the SDAP layer carries at least one of the following information: the RB identifier of the public RB mapped by the data packet, the QoS flow of the QoS flow to which the data packet belongs. Identity, terminal identification corresponding to the data packet, SDAP PDU.

For a more detailed description of the common RB established between the first function of the SDAP layer and the second function of the MAC layer, please refer to the above description, which will not be described again here.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the second functional side of the MAC layer. The implementation methods in each of the above embodiments are applicable to the embodiment of the second function of the MAC layer. , the same technical effect can be achieved. The above-mentioned second function of the MAC layer provided by the embodiment of the present disclosure can realize all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts in this embodiment that are the same as those in the method embodiment will no longer be discussed here. and beneficial effects are described in detail.

Please refer to Figure 11. The embodiment of the present disclosure also provides a first function 1100 of the SDAP layer, including a processor 1101, a memory 1102, and a computer program stored on the memory 1102 and executable on the processor 1101. The computer When the program is executed by the processor 1101, each process of the above-mentioned data transmission method embodiment executed by the first function of the SDAP layer is implemented, and the same technical effect can be achieved. To avoid duplication, the details will not be described here.

Please refer to Figure 12. The embodiment of the present disclosure also provides a second function 1200 of the MAC layer, including a processor 1201, a memory 1202, and a computer program stored on the memory 1202 and executable on the processor 1201. The computer When the program is executed by the processor 1201, each process of the above-mentioned data transmission method embodiment executed by the second function of the MAC layer is implemented, and the same technical effect can be achieved. To avoid repetition, the details will not be described here.

Embodiments of the present disclosure also provide a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the above-mentioned data transmission method embodiment is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition. Among them, the computer-readable storage medium is such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

It should be noted that, in this article, the terms “comprising”, “comprising” or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, but also other elements not expressly listed, or Also included are elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present disclosure can be embodied in the form of a software product in essence or that contributes to related technologies. The computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ), includes several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present disclosure.

The embodiments of the present disclosure have been described above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this disclosure, many forms can be made without departing from the purpose of this disclosure and the scope protected by the claims, all of which fall within the protection of this disclosure.

Claims (24)

A data transmission method including: The first function of the service data adaptation protocol SDAP layer maps the first data packet received from the first QoS flow to the first QoS flow according to the quality of service QoS guarantee requirements corresponding to the public radio bearer RB and the QoS requirements of the first QoS flow. The second function sent to the media access control MAC layer on the public RB; and / or, The first function of the SDAP layer receives the second data packet sent by the second function of the MAC layer from the second public RB, and based on the terminal identification of the first terminal and the QoS flow identification of the second QoS flow carried in the second data packet, Map the second data packet to the second QoS flow of the first terminal for sending; Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission. The method according to claim 1, wherein the first data packet received from the first QoS flow is mapped according to the quality of service QoS guarantee requirements corresponding to the public radio bearer RB and the QoS requirements of the first QoS flow. Send to the first public RB to the second function of media access control, including: The first function determines the first public RB that matches the QoS requirement of the first QoS flow based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the first QoS flow; A first data packet received on the first QoS flow is sent to the second function through the first common RB. The method according to claim 1, wherein the first data packet received from the first QoS flow is mapped according to the quality of service QoS guarantee requirements corresponding to the public radio bearer RB and the QoS requirements of the first QoS flow. Send to the first public RB to the second function of media access control, including: The first function receives a first data packet from the first QoS flow and obtains the QoS requirement of the first data packet; According to the QoS guarantee requirements corresponding to each public RB and the QoS requirements of the first data packet, determine The first public RB matching the QoS requirement of the first data packet; The first data packet is sent to the second function through the first common RB. The method according to claim 1, wherein the identification ID of the public RB is: an index of the QoS guarantee requirement corresponding to the public RB. The method according to claim 1, wherein the first function and the second function are directly connected through the common RB. The method of claim 1, wherein, The terminal-side public RB is established between the first function and the second function of the terminal. The network-side public RB is established between the first function and the second function of the network device and has QoS guarantee requirements consistent with the terminal-side public RB. . The method according to claim 1, wherein any common RB established between the first function and the second function of the network device is used to transmit data packets of at least one QoS flow, and the at least one QoS flow is one or QoS flows of multiple terminals, and the QoS requirement of the at least one QoS flow matches the QoS guarantee requirement of any public RB. The method according to claim 1, wherein the common RB established between the first function and the second function is a connection-oriented bearer or a connectionless bearer, and the connectionless RB refers to the first function. There is no connecting entity to the second function. The method according to claim 1, wherein the transmission direction of the common RB established between the first function and the second function includes unidirectional transmission or bidirectional transmission. The method of claim 1, wherein, The data packet sent by the first function to the second function carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the corresponding Terminal identification, SDAP protocol data unit PDU; The data packet received by the first function from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the corresponding Terminal identification, SDAP PDU. A data transmission method including: The second function of the MAC layer receives the first data packet sent by the first function of the SDAP layer from the first public RB, and determines the first data packet based on the first public RB and the QoS guarantee requirements corresponding to the public RB. According to the QoS requirement of the first data packet or the first QoS flow, the data packet or the QoS flow is scheduled according to the QoS requirement of the first data packet, and the first QoS flow is the QoS flow to which the first data packet belongs. ; and / or, The second function of the MAC layer determines the second public RB that matches the QoS requirement of the second data packet based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the second data packet. The packet is mapped to the second public RB and sent to the first function of the SDAP layer; Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission. The method according to claim 11, wherein before determining the second public RB matching the QoS requirement of the second data packet, further comprising: The second function determines the QoS requirement of the second data packet according to the QoS rule. The method according to claim 11, wherein the identification ID of the public RB is: an index of the QoS guarantee requirement corresponding to the public RB. The method of claim 11, wherein the second function and the first function are directly connected through the common RB. The method according to claim 11, wherein the terminal-side common RB established between the first function and the second function of the terminal is established between the first function and the second function of the network device and the terminal-side common RB. Network-side public RB consistent with QoS guarantee requirements. The method according to claim 11, wherein any common RB established between the second function and the first function of the network device is used to transmit data packets of at least one QoS flow, and the at least one QoS flow is one or QoS flows of multiple terminals, and the QoS requirement of the at least one QoS flow matches the QoS guarantee requirement of any public RB. The method according to claim 11, wherein the common RB established between the second function and the first function is a connection-oriented bearer or a connectionless bearer, wherein the connectionless RB refers to the first function. There is no connecting entity between the first function and the second function. The method according to claim 11, wherein the transmission direction of the common RB established between the second function and the first function includes unidirectional transmission or bidirectional transmission. The method of claim 11, wherein The data packet received by the second function from the RB carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the corresponding Terminal identification, SDAP PDU; The data packet sent by the second function to the first function carries at least one of the following information: the RB identification of the public RB mapped by the data packet, the QoS flow identification of the QoS flow to which the data packet belongs, the corresponding Terminal identification, SDAP PDU. A data transmission device, applied to the first function of the SDAP layer, the data transmission device includes: a transceiver and a processor: The transceiver is used to send and receive data under the control of the processor; The processor is configured to map the first data packet received from the first QoS flow to the first data packet sent to the MAC layer on the first common RB according to the QoS guarantee requirements corresponding to the RB and the QoS requirements of the first QoS flow. The second function; and/or, receiving the second data packet sent by the second function of the MAC layer from the second public RB, based on the terminal identification of the first terminal carried by the second data packet and the QoS flow of the second QoS flow. identification, mapping the second data packet to the second QoS stream of the first terminal for sending; Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission. A data transmission device, applied to the first function of the SDAP layer, the data transmission device includes: a processor, a memory and a program stored on the memory and executable on the processor, the program is When executed by the processor, the steps of the method according to any one of claims 1 to 10 are implemented. A data transmission device, applied to the second function of the MAC layer, the data transmission device includes: a transceiver and a processor: The transceiver is used to send and receive data under the control of the processor; The processor is configured to receive the first data packet sent by the first function of the SDAP layer from the first public RB, and determine the first data packet according to the first public RB and the QoS guarantee requirements corresponding to the public RB. Or the QoS requirement of the first QoS flow, the scheduling of the data packet or the scheduling of the QoS flow is performed according to the QoS requirement of the first data packet, and the first QoS flow is the first QoS flow to which the first data packet belongs. QoS flow; and/or, based on the QoS guarantee requirements corresponding to each public RB and the QoS requirement of the second data packet, determine the second public RB that matches the QoS requirement of the second data packet, and determine the second public RB from the second data packet. The data packet is mapped to the first function sent to the SDAP layer on the second public RB; Wherein, at least one common RB is established between the SDAP layer and the MAC layer, the common RB is an RB shared by at least one terminal, and each common RB corresponds to a QoS guarantee requirement for data transmission. A data transmission device applied to the second function of the MAC layer. The data transmission device includes: a processor, a memory, and a program stored on the memory and operable on the processor. The program is When executed by the processor, the steps of the method according to any one of claims 11 to 19 are implemented. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 19 are implemented.