WO2023115301A1

WO2023115301A1 - Data transmission method and apparatus, and computer device and storage medium

Info

Publication number: WO2023115301A1
Application number: PCT/CN2021/139914
Authority: WO
Inventors: 林雪; 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2023-06-29

Abstract

A data transmission method and apparatus, and a computer device and a storage medium, which belong to the technical field of wireless communications. The method comprises: when a terminal device is in a dual-connectivity scenario, transmitting data on a split bearer by means of a target link among two radio links, wherein the target link is determined on the basis of the radio link quality of each of the two radio links, and the two radio links correspond to different network nodes. By means of the solution, the transmission efficiency of data on a split bearer is improved, thereby improving the uplink transmission efficiency and the uplink transmission throughput in a dual-connectivity scenario.

Description

Data transmission method, device, computer equipment and storage medium

technical field

The present application relates to the technical field of wireless communication, and in particular to a data transmission method, device, computer equipment and storage medium.

Background technique

The Multi-RAT Dual Connectivity (MR-DC) scenario of Radio Access Technology (RAT) is a scenario in which two radio access technologies are used for data communication at the same time.

In the dual connectivity scenario, there may be three radio bearers in the terminal, which are the radio bearer of the primary cell group, the radio bearer of the secondary cell group, and the split bearer. Wherein, the terminal may select one of the two radio links to send the data on the split bearer according to the amount of data to be sent.

Contents of the invention

Embodiments of the present application provide a data transmission method, device, computer equipment, and storage medium. Described technical scheme is as follows:

On the one hand, an embodiment of the present application provides a data transmission method, the method is executed by a terminal device, and the method includes:

When the terminal device is in a dual connectivity scenario, transmit the data on the split bearer through the target link in the two wireless links;

Wherein, the target link is determined based on respective radio link qualities of the two radio links; the two radio links correspond to different network nodes.

In a possible implementation manner, the two wireless links include a wireless link for communicating with the primary node and a wireless link for communicating with the secondary node;

The target link is based on the high-low relationship between the first wireless link quality corresponding to the wireless link communicating with the primary node and the second wireless link quality corresponding to the wireless link communicating with the secondary node definite.

In a possible implementation manner, the transmission of the data on the split bearer through the target link in the two wireless links includes:

Through the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, the PDCP protocol data unit (Protocol Data Unit, PDU) of the data on the split bearer is submitted to the (Radio Link Control, RLC) corresponding to the target link ) entity; the target link is a wireless link with high wireless link quality among the wireless link communicating with the primary node and the wireless link communicating with the secondary node.

In a possible implementation manner, before transmitting the data on the split bearer through the target link in the two wireless links, the method further includes:

Obtain a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is to be The amount of new data transferred;

The transmission of the data on the split bearer through the target link in the two wireless links includes:

When the first data amount is greater than or equal to the data amount threshold, the data on the split bearer is transmitted through the target link of the two wireless links.

When the first data amount is less than the data amount threshold, the data on the split bearer is transmitted through the target link of the two wireless links.

Based on the high-low relationship between the radio link qualities of the two radio links, determine the primary RLC entity and the split secondary RLC entity.

Deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.

In a possible implementation manner, before determining the primary RLC entity and splitting the secondary RLC entity based on the high-low relationship between the radio link qualities of the two radio links, the method includes:

The determination of the primary RLC entity and the split secondary RLC entity based on the high-low relationship between the respective wireless link qualities of the two wireless links includes:

When the first data amount is not greater than the data amount threshold, based on the high-low relationship between the radio link qualities of the two radio links, determine the primary RLC entity and the split secondary RLC entity.

The target link is based on a difference between a first radio link quality corresponding to the radio link communicating with the primary node and a second radio link quality corresponding to the radio link communicating with the secondary node definite.

When the absolute value of the difference between the first radio link quality and the second radio link quality is greater than the difference threshold, deliver the PDCP PDU of the data on the split bearer to the target link the RLC entity; the target link is a wireless link with high quality among the wireless link communicating with the primary node and the wireless link communicating with the secondary node.

In a possible implementation manner, the data on the split bearer is transmitted through the target link in the two wireless links, including:

When the absolute value of the difference between the first radio link quality and the second radio link quality is not greater than the difference threshold, acquire a first data volume; the first data volume includes PDCP layer, master The sum of the amount of data in the RLC entity and the split auxiliary RLC entity; the amount of data in the main RLC entity and the split auxiliary RLC entity is the amount of newly transmitted data to be transmitted;

When the first data amount is not greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the main RLC entity through the PDCP layer;

When the first data amount is greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the primary RLC entity or the split secondary RLC entity through the PDCP layer.

In a possible implementation manner, the radio link quality includes a measurement indicator obtained by measuring a downlink reference signal.

In a possible implementation manner, the measurement index includes at least one of a reference signal received power RSRP, a reference signal received quality RSRQ, and a signal-to-interference-noise ratio SINR.

In a possible implementation manner, the radio link quality is obtained through a radio resource management (RRM) process.

In yet another aspect, an embodiment of the present application provides a data transmission device, the device comprising:

A transmission module, configured to transmit the data on the split bearer through the target link of the two wireless links when the terminal device is in a dual connection scenario;

In a possible implementation manner, the transmission module is configured to deliver the PDCP protocol data unit PDU of the data on the split bearer to the RLC entity corresponding to the target link through the packet data convergence protocol PDCP layer; The target link is a wireless link with high wireless link quality among the wireless link communicating with the primary node and the wireless link communicating with the secondary node.

In a possible implementation manner, the device further includes:

A data amount acquisition module, configured to acquire a first data amount before the transmission module transmits the data on the split bearer through the target link in the two wireless links, and the first data amount includes the PDCP layer and the main RLC entity , and the sum of the amount of data in the split secondary RLC entity; the amount of data in the primary RLC entity and the split secondary RLC entity is the amount of newly transmitted data to be transmitted;

The transmission module is configured to, when the first data amount is greater than or equal to a data amount threshold, transmit the data on the split bearer through the target link of the two wireless links.

In a possible implementation manner, the device further includes:

The transmission module is configured to transmit the data on the split bearer through the target link of the two wireless links when the first data volume is less than the data volume threshold.

In a possible implementation manner, the device further includes:

The entity determination module is configured to, before the transmission module transmits the data on the split bearer through the target link of the two wireless links, based on the high-low relationship between the respective wireless link qualities of the two wireless links, Determine the primary RLC entity and the split secondary RLC entity.

In a possible implementation manner, the transmission module is configured to deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.

In a possible implementation manner, the device further includes:

A data volume acquisition module, configured to acquire a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the primary RLC entity and the split secondary RLC The amount of data in the entity is the amount of newly transmitted data to be transmitted;

The entity determination module is configured to determine the primary RLC entity and the split secondary RLC entity based on the high-low relationship between the respective wireless link qualities of the two wireless links when the first data volume is not greater than the data volume threshold entity.

In a possible implementation manner, the transmission module is configured to, when the absolute value of the difference between the first radio link quality and the second radio link quality is greater than a difference threshold, transmit the The PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity of the target link; the target link is a wireless link communicating with the primary node and a wireless link communicating with the secondary node Medium, the radio link with high radio link quality.

In a possible implementation manner, the transmission module is configured to:

On the other hand, an embodiment of the present application provides a computer device, the computer device is implemented as a terminal device, and the computer device includes a processor, a memory, and a transceiver;

The transceiver is configured to, when the terminal device is in a dual connectivity scenario, transmit the data on the split bearer through the target link of the two wireless links;

In yet another aspect, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement the above data transmission method.

In another aspect, a computer program product or computer program is provided, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the above data transmission method.

The technical solutions provided in the embodiments of the present application can bring the following beneficial effects:

For a terminal device that is in a dual connectivity scenario and has two wireless links corresponding to different network nodes, it can choose to transmit through the target link of the two wireless links based on the respective wireless link quality of the wireless links. Split the data on the bearer. That is to say, in the above solution, in the dual connectivity scenario, the terminal device can select the transmission link of the data on the split bearer based on the wireless link quality of the wireless link, thereby improving the transmission efficiency of the data on the split bearer , thereby improving uplink transmission efficiency in a dual-connection scenario, and improving uplink transmission throughput in a dual-connection scenario.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a network architecture of a communication system provided by an embodiment of the present application;

FIG. 2 and FIG. 3 are structural diagrams of the user plane protocol stack in the MR-DC scenario involved in the present application;

FIG. 4 is a flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a data transmission process provided by an embodiment of the present application;

FIG. 6 is a flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 7 is a flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 8 is a flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 9 is a block diagram of a data transmission device provided by an embodiment of the present application;

Fig. 10 is a schematic structural diagram of a computer device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

Please refer to FIG. 1 , which shows a schematic diagram of a network architecture of a communication system provided by an embodiment of the present application. The network architecture may include: a terminal 10 and a base station 20 .

The number of terminals 10 is generally multiple, and one or more terminals 10 may be distributed in a cell managed by each base station 20 . The terminal 10 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (User Equipment, UE), mobile station ( Mobile Station, MS), terminal device (terminal device) and so on. For convenience of description, in the embodiment of the present application, the above-mentioned devices are collectively referred to as terminals.

The base station 20 is a device deployed in an access network to provide a wireless communication function for the terminal 10 . The base station 20 may include various forms of satellite base stations, macro base stations, micro base stations, relay stations, access points, and so on. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in the 5th-Generation (5G) New Radio (New Radio, NR) system, It is called gNodeB or gNB. The name "base station" may change as communication technology evolves. For the convenience of description, in the embodiment of the present application, the above-mentioned devices that provide the wireless communication function for the terminal 20 are collectively referred to as base stations.

Optionally, what is not shown in FIG. 1 is that the above-mentioned network architecture also includes other network devices, such as: a central control node (Central Network Control, CNC), an access and mobility management function (Access and Mobility Management Function, AMF ) device, session management function (Session Management Function, SMF) or user plane function (User Plane Function, UPF) device, etc.

The "5G NR system" in the embodiments of the present disclosure may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning. The technical solution described in the embodiments of the present disclosure can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.

Before introducing the schemes shown in the subsequent embodiments of the present application, several terms and concepts involved in the present application are firstly introduced.

Dual-Connectivity (DC) is an important technology introduced by the 3rd Generation Partnership Project (3GPP) organization. Through dual connectivity technology, Long Term Evolution (LTE) macro stations and small stations can use the non-ideal backhaul (non-ideal backhaul) X2 interface to achieve carrier aggregation, thereby providing users with higher rates and utilizing macro /Micro-networking improves spectrum efficiency and load balancing. A terminal device that supports dual connections can connect to two base stations at the same time, increasing the throughput of a single user.

During the deployment of the 5G network, the 5G cell can be used as a macro coverage independent network, or as a small cell to enhance the coverage and capacity of the existing LTE network. No matter which networking method is adopted, dual connectivity technology can be used to realize the interconnection of LTE-5G systems, thereby improving the utilization rate of wireless resources of the entire mobile network system, reducing the delay of system switching, and improving user and system performance. 3GPP defines the dual connectivity technology of LTE and 5G on the basis of LTE dual connectivity technology. LTE-5G dual connectivity is a key technology for operators to realize LTE and 5G converged networking and flexible deployment scenarios. In the early stage of 5G, it can be quickly deployed based on the existing LTE core network. In the later stage, the joint networking of LTE and 5G can be used to achieve comprehensive network coverage, improve the utilization of wireless resources in the entire network system, reduce system switching delays, and improve user experience. and system performance.

At present, with people's pursuit of speed, delay, high-speed mobility, and energy efficiency, as well as the diversity and complexity of services in future life, the 3GPP international standards organization has begun to develop 5G. The main application scenarios of 5G are: Enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communication (URLLC), and Massive Machine Type Communication (mMTC).

eMBB still aims at users' access to multimedia content, services and data, and its demand is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoors, urban areas, and rural areas, the capabilities and requirements are quite different, so it cannot be generalized, and detailed analysis must be combined with specific deployment scenarios. Typical applications of URLLC include: industrial automation, electric power automation, telemedicine operations (surgery), traffic safety guarantee, etc. The typical characteristics of mMTC include: high connection density, small data volume, delay-insensitive services, low cost and long service life of modules, etc.

In the early deployment of NR, it is difficult to obtain complete NR coverage, so the typical network coverage is wide-area LTE coverage and NR island coverage mode. Moreover, a large number of LTE deployments are below 6GHz, and there is very little spectrum below 6GHz that can be used for 5G. Therefore, NR must study the spectrum application above 6GHz, while the coverage of high frequency bands is limited and the signal fades quickly. At the same time, in order to protect mobile operators' early investment in LTE, a tight interworking working mode between LTE and NR is proposed.

In order to realize 5G network deployment and commercial application as soon as possible, 3GPP first completed the first 5G version, namely EN-DC (LTE-NR Dual Connectivity, LTE-NR Dual Connectivity), before the end of December 2017. Here LTE serves as MN (Master Node), and NR serves as SN (Secondary Node).

Among them, the main radio resource control (Radio Resource Control, RRC) control function of the MN node and the control plane leading to the core network (Core Network, CN), and the SN node can configure auxiliary signaling, such as Signaling Radio Bearer (Signaling Radio Bearer) , SRB) 3, which mainly provides data transmission function.

In the later stage of R15, other DC modes will be supported, namely NR and Evolved Universal Terrestrial Radio Access (E-UTRA) dual connectivity (NR-E-UTRA Dual Connectivity, NE-DC), 5G core network ( 5G Core Network, 5GC) E-UTRA and NR dual connectivity (5GC-EN-DC), and NR DC. For EN-DC, the core network connected to the access network is EPC, while the core network connected to other DC modes is 5GC.

From the perspective of the terminal, the structure of the user plane protocol stack in the MR-DC scenario is shown in Figure 2 and Figure 3. Among them, Figure 2 shows the terminal-side protocol stack architecture in the EN-DC scenario, and the core network is an evolved packet core network (Evolved Packet Core network, EPC); Figure 3 shows the next-generation E-UTRA and NR dual connectivity ( NG-RAN E-UTRA-NR Dual Connectivity, NGEN-DC), NE-DC or NR-DC scenario, the terminal side protocol stack architecture, the core network is 5GC.

There are three types of radio bearers (Radio Bearer) for terminals under MR-DC, namely the Master Cell Group (MCG) bearer (MCG bearer), the secondary cell group (Secondary Cell Group, SCG) bearer (SCG bearer) and split bearer (split bearer). When a radio bearer's RLC, Media Access Control (MAC), and physical layer (Physical, PHY) protocol stacks are located in the MN, such a radio bearer is called an MCG bearer, otherwise it is called an SCG bearer. Split bearer has wireless links on both MN and SN, but there is only one PDCP protocol stack, which may be on the MN side or on the SN side. The purpose of the Split bearer is to increase the traffic of the wireless interface. When the PDCP layer allows retransmission of PDCP packets between different links, the split bearer can also improve the reliability of the radio bearer.

Please refer to FIG. 4 , which shows a flow chart of a data transmission method provided by an embodiment of the present application. The method can be executed by a terminal device, wherein the above-mentioned terminal device can be a terminal in the network architecture shown in FIG. 1 . The method may include the following steps:

Step 401, when the terminal device is in a dual connectivity scenario, transmit the data on the split bearer through the target link of the two wireless links; the target link is determined based on the respective wireless link qualities of the two wireless links; The two wireless links correspond to different network nodes.

To sum up, in the solution shown in the embodiment of the present application, for a terminal device that is in a dual connectivity scenario and has two wireless links corresponding to different network nodes, it can be based on the wireless link quality of each wireless link , choose to transmit the data on the split bearer through the target link in the two wireless links. That is to say, in the above solution, in the dual connectivity scenario, the terminal device can select the transmission link of the data on the split bearer based on the wireless link quality of the wireless link, thereby improving the transmission efficiency of the data on the split bearer , thereby improving uplink transmission efficiency in a dual-connection scenario, and improving uplink transmission throughput in a dual-connection scenario.

Please refer to FIG. 5 , which shows a schematic diagram of a data transmission process provided by an embodiment of the present application. As shown in FIG. 5 , the terminal device 501 is in a dual connectivity scenario, and establishes wireless links with the primary node 502 and the secondary node 503 at the same time.

In FIG. 5, the terminal device 501 measures the wireless link corresponding to the primary node 502 to obtain the first wireless link quality (step S1); and the terminal device 501 measures the wireless link corresponding to the secondary node 503 to obtain The second radio link quality (step S2); then, the terminal device 501 selects the target radio link through which to transmit the data on the split bearer according to the first radio link quality and the second radio link quality (step S3).

Please refer to FIG. 6 , which shows a flow chart of a data transmission method provided by an embodiment of the present application. The method can be executed by a terminal device; wherein, the above-mentioned terminal device can be a terminal in the network architecture shown in FIG. 1 . As shown in Figure 6, the method may include the following steps:

Step 601, when the terminal device is in the dual connectivity scenario, acquire the first wireless link quality corresponding to the wireless link communicating with the primary node, and the second wireless link quality corresponding to the wireless link communicating with the secondary node.

Wherein, the above two wireless links correspond to different network nodes.

Optionally, the above two wireless links are wireless links established based on different wireless connection technologies.

The above two wireless links include a wireless link for communicating with the primary node and a wireless link for communicating with the secondary node.

Step 602, the terminal device determines a target link based on the high-low relationship between the quality of the first wireless link and the quality of the second wireless link.

That is to say, in this embodiment of the application, the target link is based on the first radio link quality corresponding to the radio link communicating with the master node and the second radio link quality corresponding to the radio link communicating with the slave node The high-low relationship between them is determined.

In a possible implementation manner, the foregoing target link is a wireless link with high quality of the wireless link among the wireless link for communicating with the primary node and the wireless link for communicating with the secondary node.

That is to say, the terminal device may determine, among the wireless links for communicating with the primary node and the wireless links for communicating with the secondary node, a wireless link with high wireless link quality as the target link.

Step 603, the terminal device transmits the data on the split bearer through the target link of the two wireless links.

In a possible implementation manner, the terminal device may deliver the PDCP protocol data unit PDU of the data on the split bearer to the RLC entity corresponding to the target link through the packet data convergence protocol PDCP layer.

In a possible implementation manner, before the data on the split bearer is transmitted through the target link of the two radio links, the terminal device may obtain the first data amount, where the first data amount includes the PDCP layer, the main RLC entity, and The sum of data volumes in the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is the newly transmitted data volume to be transmitted.

When the first data amount is greater than or equal to the data amount threshold, the terminal device may transmit the data on the split bearer through the target link of the two wireless links.

In this embodiment of the present application, the terminal device may first obtain the sum of the newly transmitted data volumes to be transmitted in the PDCP layer, the primary RLC entity, and the split secondary RLC entity as the first data volume, and when the first data volume is too large ( greater than the data volume threshold), the PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity corresponding to the target link through the PDCP layer of the packet data convergence protocol.

In another possible implementation manner, before the terminal device transmits the data on the split bearer through the target link of the two wireless links, acquire the above-mentioned first data amount; when the first data amount is less than the data amount threshold, The terminal device transmits the data on the split bearer through the target link in the two wireless links.

In this embodiment of the present application, the terminal device may first obtain the sum of the data amounts in the PDCP layer, the primary RLC entity, and the split secondary RLC entity as the first data amount, and when the first data amount is too small (not greater than the data When the packet data convergence protocol PDCP layer is used, the PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity corresponding to the target link.

In this embodiment of the present application, the data in the above RLC may include initial transmission data to be transmitted.

In another possible implementation manner, the radio link quality includes a measurement index obtained by measuring a downlink reference signal.

In another possible implementation manner, the measurement index includes at least one of a reference signal received power RSRP, a reference signal received quality RSRQ, and a signal-to-interference-noise ratio SINR.

In another possible implementation manner, the radio link quality is obtained through a radio resource management (RRM) procedure.

In this embodiment of the present application, for a UE configured with MR-DC, a method for PDCP layer transmission of newly uploaded data on a split bearer is provided, and the method may include:

S1. The terminal device determines the size of the first data volume, where the first data volume includes PDCP layer data volume + primary RLC data volume + split secondary RLC data volume. Wherein, the data volume of the primary RLC layer and the split secondary RLC layer is the data volume of newly transmitted data to be transmitted.

S2, if the first data amount is greater than or equal to the first data amount threshold, the terminal further judges the quality of the wireless link between the MN and the SN side; for example, the primary RLC entity corresponds to the wireless link on the MN side, and the quality of the wireless link on the MN side is A; split secondary The RLC entity corresponds to the wireless link on the SN side, and the quality of the wireless link on the SN side is B.

S3, if A is greater than or equal to B, then PDCP submits the PDCP PDU to the primary RLC entity.

S4, if A is less than or equal to B, the PDCP splits the secondary RLC entity submitted by the PDCP PDU.

In the embodiment of the present application, for the UE configured with MR-DC, another method for PDCP layer transmission of newly uploaded data on the split bearer is provided, and the method may include:

S2, if the first data amount is not greater than the first data amount threshold, the terminal further judges the quality of the wireless link between the MN and the SN side; for example, the primary RLC entity corresponds to the wireless link on the MN side, and the quality of the wireless link on the MN side is A; split secondary The RLC entity corresponds to the wireless link on the SN side, and the quality of the wireless link on the SN side is B.

Wherein, the wireless link quality of the MN and SN side can be a downlink reference (including a synchronization signal block (Synchronization Signal Block, SSB) and/or a channel status indicator reference signal (Channel Status Indicator Reference Signal, CSI-RS)) measurement results, The measurement index is one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal to Interference plus Noise Ratio (SINR) or more; wherein, the above measurement results can be obtained based on a radio resource management (Radio Resource Management, RRM) process.

Please refer to FIG. 7 , which shows a flow chart of a data transmission method provided by an embodiment of the present application. The method can be executed by a terminal device; wherein, the above-mentioned terminal device can be a terminal in the network architecture shown in FIG. 1 . As shown in Figure 7, the method may include the following steps:

Step 701, when the terminal device is in the dual connectivity scenario, acquire the first wireless link quality corresponding to the wireless link communicating with the primary node, and the second wireless link quality corresponding to the wireless link communicating with the secondary node.

Wherein, the above two wireless links correspond to different network nodes.

Step 702: Determine the primary RLC entity and the split secondary RLC entity based on the high-low relationship between the radio link qualities of the two radio links.

In a possible implementation, if the radio link quality of the radio link communicating with the master node is lower than the radio link quality of the radio link communicating with the slave node, the terminal device switches the master RLC entity and splits the slave RLC entity, that is, switch the primary RLC entity to the split secondary RLC entity, and switch the split secondary RLC entity to the primary RLC entity. Otherwise, the terminal device maintains the primary RLC entity and the split secondary RLC entity.

In another possible implementation, if the wireless link quality of the wireless link communicating with the master node is lower than the wireless link quality of the wireless link communicating with the slave node, and the wireless link quality of the wireless link communicating with the master node If the difference between the radio link quality and the radio link quality of the radio link communicating with the secondary node is greater than the difference threshold, the terminal device may switch the primary RLC entity and split the secondary RLC entity. Otherwise, the terminal device maintains the primary RLC entity and the split secondary RLC entity.

In a possible implementation manner, the terminal device may obtain the first data amount, and the first data amount includes the sum of the data amounts in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the primary RLC entity and the split secondary RLC entity The amount of data in is the amount of newly transmitted data to be transmitted; when the first amount of data is not greater than the data amount threshold, based on the high-low relationship between the respective wireless link qualities of the two wireless links, determine the primary RLC entity and the split secondary RLC entity.

Step 703, deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.

In a possible implementation manner, the radio link quality is acquired through a radio resource management (RRM) process.

S1. The terminal device adjusts the primary RLC entity according to the quality of the wireless link between the MN and the SN side, and the PDCP delivers the PDCP PDU to the primary RLC entity.

For example, if A is less than or equal to B, the terminal converts the split secondary RLC entity into the primary split RLC entity.

S2, the terminal device submits the PDCP PDU of the newly transmitted data on the split bearer to the primary RLC entity through PDCP.

Wherein, the radio link quality of MN and SN side can be downlink reference (SSB and/or CSI-RS) measurement result, and measurement indicator is one or more in RSRP/RSRQ/SINR; Wherein, above-mentioned measurement result can be based on RRM process acquisition.

Please refer to FIG. 8 , which shows a flow chart of a data transmission method provided by an embodiment of the present application, and the method may be executed by a terminal device; wherein, the above-mentioned terminal device may be a terminal in the network architecture shown in FIG. 1 . As shown in Figure 8, the method may include the following steps:

Step 801, when the terminal device is in the dual connectivity scenario, acquire the first wireless link quality corresponding to the wireless link communicating with the primary node, and the second wireless link quality corresponding to the wireless link communicating with the secondary node.

Wherein, the above two wireless links correspond to different network nodes.

Step 802, acquiring a difference between a first radio link quality corresponding to the radio link communicating with the master node and a second radio link quality corresponding to the radio link communicating with the slave node.

That is to say, in the embodiment of the present application, the target link is determined based on respective wireless link qualities of the two wireless links.

Step 803, when the absolute value of the difference between the first radio link quality and the second radio link quality is greater than the difference threshold, submit the PDCP protocol data unit PDU of the data on the split bearer to the RLC of the target link Entity; the target link is a wireless link with high wireless link quality among the wireless links communicating with the primary node and the wireless links communicating with the secondary node.

In another possible implementation manner, when the absolute value of the difference between the first radio link quality and the second radio link quality is not greater than the difference threshold, the first data amount is acquired; the first data amount includes The sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is the newly transmitted data volume to be transmitted. When the first data amount is not greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the main RLC entity through the PDCP layer. When the first data amount is greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the primary RLC entity or the secondary RLC entity through the PDCP layer.

In a possible implementation manner, the radio link quality includes a measurement index obtained by measuring a downlink reference signal.

S1. The terminal device judges whether the difference in wireless link quality between the MN and the SN is greater than a first quality threshold; for example, the quality of the wireless link on the MN side is A, and the quality of the wireless link on the SN side is B.

S2. If |A-B| is greater than or equal to the first quality threshold, the PDCP delivers the PDCP PDU of the newly transmitted data on the PDCP layer split bearer to the RLC entity with better radio link quality.

S3, if |A-B| is less than or equal to the first quality threshold, the UE further judges the size of the first data volume, and if the total data volume of the current PDCP layer and its associated RLC layer is equal to or greater than ul-DataSplitThreshold (split threshold), then The PDCP PDU of the newly transmitted data on the PDCP layer split bearer is submitted to the primary RLC entity or the secondary RLC entity (entity); otherwise (that is, the amount of data is less than ul-DataSplitThreshold), the PDCP PDU of the newly transmitted data on the PDCP layer split bearer Submitted to the primary RLC entity.

Please refer to FIG. 9 , which shows a block diagram of a data transmission device provided by an embodiment of the present application. The device can be used in terminal equipment. As shown in Figure 9, the device may include:

The transmission module 901 is configured to transmit the data on the split bearer through the target link of the two wireless links when the terminal device is in a dual connectivity scenario;

In a possible implementation manner, the transmission module 901 is configured to deliver the PDCP protocol data unit PDU of the data on the split bearer to the RLC entity corresponding to the target link through the packet data convergence protocol PDCP layer ; The target link is a wireless link with high wireless link quality among the wireless link communicating with the primary node and the wireless link communicating with the secondary node.

In a possible implementation manner, the device further includes:

A data amount acquisition module, configured to acquire a first data amount before the transmission module 901 transmits the data on the split bearer through the target link of the two wireless links, and the first data amount includes PDCP layer, primary RLC The sum of the amount of data in the entity and the split auxiliary RLC entity; the amount of data in the main RLC entity and the split auxiliary RLC entity is the amount of newly transmitted data to be transmitted;

The transmission module 901 is configured to, when the first data volume is greater than or equal to a data volume threshold, transmit the data on the split bearer through the target link in the two wireless links.

In a possible implementation manner, the device further includes:

The transmission module 901 is configured to transmit the data on the split bearer through the target link of the two wireless links when the first data volume is less than a data volume threshold.

In a possible implementation manner, the device further includes:

The entity determination module is configured to, before the transmission module 901 transmits the data on the split bearer through the target link of the two wireless links, based on the high-low relationship between the respective wireless link qualities of the two wireless links , determine the primary RLC entity and the split secondary RLC entity.

In a possible implementation manner, the transmission module 901 is configured to deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.

In a possible implementation manner, the device further includes:

In a possible implementation manner, the transmission module 901 is configured to, when the absolute value of the difference between the first radio link quality and the second radio link quality is greater than a difference threshold, send The PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity of the target link; the target link is a wireless link communicating with the primary node and a wireless link communicating with the secondary node In the middle of the road, the wireless link with high wireless link quality.

In a possible implementation manner, the transmission module 901 is configured to:

It should be noted that when the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to FIG. 10 , which shows a schematic structural diagram of a computer device 1010 provided by an embodiment of the present application. The computer device 1000 may include: a processor 1001 , a receiver 1002 , a transmitter 1003 , a memory 1004 and a bus 1005 .

The processor 1001 includes one or more processing cores, and the processor 1001 executes various functional applications and information processing by running software programs and modules.

The receiver 1002 and the transmitter 1003 can be realized as a communication component, and the communication component can be a communication chip. The communication chip can also be called a transceiver.

The memory 1004 is connected to the processor 1001 through a bus 1005 .

The memory 1004 may be used to store a computer program, and the processor 1001 is used to execute the computer program, so as to implement various steps performed by the terminal device in the foregoing method embodiments.

In addition, the memory 1004 can be realized by any type of volatile or non-volatile storage device or their combination, volatile or non-volatile storage devices include but not limited to: magnetic disk or optical disk, electrically erasable and programmable Read Only Memory, Erasable Programmable Read Only Memory, Static Anytime Access Memory, Read Only Memory, Magnetic Memory, Flash Memory, Programmable Read Only Memory.

The foregoing computer device may be implemented as the terminal device in each of the foregoing method embodiments.

In an exemplary embodiment, the computer device includes a processor, a memory, and a transceiver (the transceiver may include a receiver and a transmitter, the receiver is used to receive information, and the transmitter is used to send information);

When the above computer device is implemented as the terminal device in each of the above method embodiments,

Through the packet data convergence protocol PDCP layer, the PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity corresponding to the target link; the target link is a wireless link communicating with the master node And among the wireless links for communicating with the secondary node, the wireless link has a high quality wireless link.

The embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement the above-mentioned information in FIG. 4 , FIG. 6 , FIG. 7 or FIG. 8 . In the data transmission method shown, each step is performed by the terminal device.

The present application also provides a computer program product or computer program, the computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device performs the data transmission method shown in FIG. 4, FIG. 6, FIG. 7 or FIG. 8 above, by The various steps performed by the end device.

The present application also provides a computer program, the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device performs the data transmission method shown in FIG. 4, FIG. 6, FIG. 7 or FIG. 8 above, by The various steps performed by the end device.

The present application also provides a chip, which is used in a terminal device. The chip can execute various steps performed by the terminal device in the data transmission method shown in FIG. 4 , FIG. 6 , FIG. 7 or FIG. 8 .

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only exemplary embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims

A data transmission method, characterized in that the method is executed by a terminal device, and the method includes:

When the terminal device is in a dual connectivity scenario, transmit the data on the split bearer through the target link in the two wireless links;

Wherein, the target link is determined based on respective radio link qualities of the two radio links; the two radio links correspond to different network nodes.
The method according to claim 1, wherein the two kinds of wireless links include a wireless link for communicating with the primary node, and a wireless link for communicating with the secondary node;

The target link is based on the high-low relationship between the first wireless link quality corresponding to the wireless link communicating with the primary node and the second wireless link quality corresponding to the wireless link communicating with the secondary node definite.
The method according to claim 2, wherein the transmitting the data on the split bearer through the target link in the two wireless links comprises:

Through the packet data convergence protocol PDCP layer, the PDCP protocol data unit PDU of the data on the split bearer is delivered to the RLC entity corresponding to the target link; the target link is a wireless link communicating with the master node And among the wireless links for communicating with the secondary node, the wireless link has a high quality wireless link.
The method according to claim 3, wherein before transmitting the data on the split bearer through the target link in the two wireless links, further comprising:

Obtain a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is to be The amount of new data transferred;

The transmission of the data on the split bearer through the target link in the two wireless links includes:

When the first data amount is greater than or equal to the data amount threshold, the data on the split bearer is transmitted through the target link of the two wireless links.
The method according to claim 3, wherein before transmitting the data on the split bearer through the target link in the two wireless links, further comprising:

Obtain a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is to be The amount of new data transferred;

The transmission of the data on the split bearer through the target link in the two wireless links includes:

When the first data amount is less than the data amount threshold, the data on the split bearer is transmitted through the target link of the two wireless links.
The method according to claim 1, wherein before transmitting the data on the split bearer through the target link in the two wireless links, further comprising:

Based on the high-low relationship between the radio link qualities of the two radio links, determine the primary RLC entity and the split secondary RLC entity.
The method according to claim 6, wherein the transmitting the data on the split bearer through the target link in the two wireless links comprises:

Deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.
The method according to claim 7, wherein, before determining the primary RLC entity and splitting the secondary RLC entity based on the high-low relationship between the respective wireless link qualities of the two wireless links, the steps include:

Obtain a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the data volume in the primary RLC entity and the split secondary RLC entity is to be The amount of new data transferred;

The determination of the primary RLC entity and the split secondary RLC entity based on the high-low relationship between the respective radio link qualities of the two radio links includes:

When the first data amount is not greater than the data amount threshold, based on the high-low relationship between the radio link qualities of the two radio links, determine the primary RLC entity and the split secondary RLC entity.
The method according to claim 1, wherein the two kinds of wireless links include a wireless link for communicating with the primary node, and a wireless link for communicating with the secondary node;

The target link is based on a difference between a first radio link quality corresponding to the radio link communicating with the primary node and a second radio link quality corresponding to the radio link communicating with the secondary node definite.
The method according to claim 9, wherein the transmitting the data on the split bearer through the target link in the two wireless links comprises:

When the absolute value of the difference between the first radio link quality and the second radio link quality is greater than the difference threshold, deliver the PDCP PDU of the data on the split bearer to the target link the RLC entity; the target link is a wireless link with high quality among the wireless link communicating with the primary node and the wireless link communicating with the secondary node.
The method according to claim 9, wherein transmitting the data on the split bearer through the target link in the two wireless links comprises:

When the absolute value of the difference between the first radio link quality and the second radio link quality is not greater than the difference threshold, acquire a first data volume; the first data volume includes PDCP layer, master The sum of the amount of data in the RLC entity and the split auxiliary RLC entity; the amount of data in the main RLC entity and the split auxiliary RLC entity is the amount of newly transmitted data to be transmitted;

When the first data amount is not greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the main RLC entity through the PDCP layer;

When the first data amount is greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the primary RLC entity or the split secondary RLC entity through the PDCP layer.
The method according to any one of claims 1 to 11, wherein the radio link quality includes a measurement index obtained by measuring a downlink reference signal.
The method according to claim 12, wherein the measurement index includes at least one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal to Interference and Noise Ratio (SINR).
The method according to any one of claims 1 to 11, wherein the radio link quality is obtained through a radio resource management (RRM) procedure.
A data transmission device, characterized in that the device comprises:

A transmission module, configured to transmit the data on the split bearer through the target link of the two wireless links when the terminal device is in a dual connection scenario;

Wherein, the target link is determined based on respective radio link qualities of the two radio links; the two radio links correspond to different network nodes.
The device according to claim 15, wherein the two types of wireless links include a wireless link for communicating with the primary node and a wireless link for communicating with the secondary node;

The target link is based on the high-low relationship between the first wireless link quality corresponding to the wireless link communicating with the primary node and the second wireless link quality corresponding to the wireless link communicating with the secondary node definite.
The device according to claim 16, characterized in that,

The transmission module is configured to deliver the PDCP protocol data unit PDU of the data on the split bearer to the RLC entity corresponding to the target link through the packet data convergence protocol PDCP layer; the target link is connected to the target link Among the wireless link for communication between the primary node and the wireless link for communication with the secondary node, the wireless link has a high quality wireless link.
The device according to claim 17, further comprising:

A data amount acquisition module, configured to acquire a first data amount before the transmission module transmits the data on the split bearer through the target link in the two wireless links, and the first data amount includes the PDCP layer and the main RLC entity , and the sum of the amount of data in the split secondary RLC entity; the amount of data in the primary RLC entity and the split secondary RLC entity is the amount of newly transmitted data to be transmitted;

The transmission module is configured to, when the first data amount is greater than or equal to a data amount threshold, transmit the data on the split bearer through the target link of the two wireless links.
The device according to claim 17, further comprising:

A data amount acquisition module, configured to acquire a first data amount before the transmission module transmits the data on the split bearer through the target link in the two wireless links, and the first data amount includes the PDCP layer and the main RLC entity , and the sum of the amount of data in the split secondary RLC entity; the amount of data in the primary RLC entity and the split secondary RLC entity is the amount of newly transmitted data to be transmitted;

The transmission module is configured to transmit the data on the split bearer through the target link of the two wireless links when the first data volume is less than the data volume threshold.
The device according to claim 15, further comprising:

The entity determination module is configured to, before the transmission module transmits the data on the split bearer through the target link of the two wireless links, based on the high-low relationship between the respective wireless link qualities of the two wireless links, Determine the primary RLC entity and the split secondary RLC entity.
The device according to claim 20, characterized in that,

The transmission module is configured to deliver the PDCP PDU of the data on the split bearer to the main RLC entity through the PDCP layer.
The device according to claim 21, further comprising:

A data volume acquisition module, configured to acquire a first data volume, where the first data volume includes the sum of the data volumes in the PDCP layer, the primary RLC entity, and the split secondary RLC entity; the primary RLC entity and the split secondary RLC The amount of data in the entity is the amount of newly transmitted data to be transmitted;

The entity determination module is configured to determine the primary RLC entity and the split secondary RLC entity based on the high-low relationship between the respective wireless link qualities of the two wireless links when the first data volume is not greater than the data volume threshold entity.
The device according to claim 15, wherein the two types of wireless links include a wireless link for communicating with the primary node and a wireless link for communicating with the secondary node;

The target link is based on a difference between a first radio link quality corresponding to the radio link communicating with the primary node and a second radio link quality corresponding to the radio link communicating with the secondary node definite.
The device according to claim 23, characterized in that,

The transmission module is configured to, when the absolute value of the difference between the quality of the first radio link and the quality of the second radio link is greater than a difference threshold, transmit the PDCP protocol of the data on the split bearer to The data unit PDU is delivered to the RLC entity of the target link; the target link is a radio link with high radio link quality among the radio link communicating with the primary node and the radio link communicating with the secondary node. link.
The device according to claim 23, wherein the transmission module is used for:

When the absolute value of the difference between the first radio link quality and the second radio link quality is not greater than the difference threshold, acquire a first data volume; the first data volume includes PDCP layer, master The sum of the amount of data in the RLC entity and the split auxiliary RLC entity; the amount of data in the main RLC entity and the split auxiliary RLC entity is the amount of newly transmitted data to be transmitted;

When the first data amount is not greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the main RLC entity through the PDCP layer;

When the first data amount is greater than the data amount threshold, the PDCP PDU of the data on the split bearer is delivered to the primary RLC entity or the split secondary RLC entity through the PDCP layer.
The device according to any one of claims 15 to 25, wherein the radio link quality includes a measurement index obtained by measuring a downlink reference signal.
The device according to claim 26, wherein the measurement index includes at least one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal-to-Interference-Noise Ratio (SINR).
The device according to any one of claims 15 to 25, wherein the radio link quality is obtained through a radio resource management (RRM) procedure.
A computer device, characterized in that the computer device is implemented as a terminal device, and the computer device includes a processor, a memory, and a transceiver;

The transceiver is configured to, when the terminal device is in a dual connectivity scenario, transmit the data on the split bearer through the target link of the two wireless links;

Wherein, the target link is determined based on respective radio link qualities of the two radio links; the two radio links correspond to different network nodes.
A computer-readable storage medium, wherein a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the data transmission method according to any one of claims 1 to 14 .
A computer program product, characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium; a processor of a computer device executes the computer instructions, so that the computer device performs the following steps: The data transmission method according to any one of claims 1 to 14.
A computer program, characterized in that the computer program includes computer instructions, and a processor of a computer device executes the computer instructions, so that the computer device executes the data transmission method according to any one of claims 1 to 14.
A chip, characterized in that the chip is used to execute the data transmission method according to any one of claims 1 to 14.