CN111866906B

CN111866906B - Data transmission method and device

Info

Publication number: CN111866906B
Application number: CN201910353924.2A
Authority: CN
Inventors: 倪春林
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2021-07-23
Anticipated expiration: 2039-04-29
Also published as: CN111866906A; WO2020220731A1

Abstract

The application provides a data transmission method and device, which are used for improving the success rate of data transmission to core network equipment. The data transmission method comprises the following steps: the main base station determines a first node where a default Data Radio Bearer (DRB) is located; the master base station sends indication information to core network equipment, wherein the indication information is used for indicating a first node where the default DRB is located, so that the core network equipment receives uplink data sent by the first node; the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from a first node, where the first node is the primary base station or the secondary base station.

Description

Data transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

In the process of Data transmission, the core network may establish one or more Protocol Data Unit (PDU) sessions for each terminal device. One PDU session may include multiple Quality of Service (QoS) flows, and for one PDU session, the network device may establish one or more Data Radio Bearers (DRBs) for the terminal device for transmitting Data packets of the terminal device. If the downlink data packet is sent to the terminal device, the network device may establish a DRB and be used to transmit the received downlink data packet when receiving the data packet to be sent to the terminal device. For example, referring to fig. 1, Q1 and Q2 correspond to DRB1, Q3 corresponds to DRB2 on the primary base station (Master Node, MN), Q4 and Q5 correspond to DRB1, Q6 and Q7 correspond to DRB2 on the Secondary base station (Secondary Node, SN), where Q is an abbreviation for QoS flow. If there is an uplink data packet sent from the terminal device to the core network through the network device, and the terminal device does not obtain the mapping relationship between the uplink QoS flow configured by the network device and the DRB, the terminal device performs uplink data transmission through the default DRB configured by the network device for each PDU session.

In case of Dual Connectivity (DC), the default DRB may be established on the primary base station as well as on the secondary base station. Referring to fig. 1, a default DRB is established on a secondary base station, when there is uplink data that needs to be uploaded to a core network through a primary base station in a terminal device, it is assumed that the uplink data corresponds to Q1, and an uplink mapping relationship between Q1 and the DRB is not established yet, in this case, the uplink data needs to be carried on the default DRB, but a general packet radio service tunneling Protocol (GTP) channel corresponding to Q1 is established on the primary base station, so that the uplink data cannot be transmitted to the core network device.

Disclosure of Invention

The embodiment of the application provides a data transmission method, which is used for improving the success rate of data transmission to core network equipment.

In a first aspect, the present application provides a data transmission method, including:

the main base station determines a first node where a default Data Radio Bearer (DRB) is located;

the master base station sends indication information to core network equipment, wherein the indication information is used for indicating a first node where the default DRB is located, so that the core network equipment receives uplink data sent by the first node;

wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from the first node, where the first node is the primary base station or the secondary base station.

In the embodiment of the present application, the primary base station may determine the node established by the default DRB by itself, or may determine which node the default DRB is established on according to the indication of the secondary base station. The first node may be a primary base station or a secondary base station. The second node may be a secondary base station when the first node is a primary base station, and the second node may be a primary base station when the second node is a secondary base station.

When the default DRB is established on the main base station, the main base station sends indication information to the core network equipment to indicate the core network equipment to receive uplink data which needs the default DRB bearer and is established on the auxiliary base station by a GTP channel corresponding to the corresponding QoS flow; when the default DRB is established on the auxiliary base station, the main base station sends indication information to the core network equipment to indicate the core network to receive uplink data which needs the default DRB bearer and the GTP channel corresponding to the corresponding QoS flow is established on the main base station. Therefore, the technical problem that uplink data which needs to be borne by the default DRB and is corresponding to the GPT channel established at the node where the non-default DRB is located cannot be transmitted to the core network in the prior art is solved, and the success rate of transmitting the data to the core network equipment is improved.

In one possible design, the method further includes:

the master base station receives a Protocol Data Unit (PDU) session resource establishment request message sent by the core network equipment;

the main base station sends indication information to the core network equipment, and the indication information comprises the following steps:

and the master base station sends a PDU session resource establishment response message to the core network equipment, wherein the PDU session resource establishment response message carries the indication information.

The data transmission method provided by the application can be applied to a PDU session establishment stage and a dual-connection establishment stage. When receiving a PDU session resource establishment request message sent by core network equipment, the main base station determines to establish dual connectivity according to the management rule and determines whether to establish the default DRB on the main base station or the auxiliary base station. And then sending an auxiliary base station adding request message to the auxiliary base station, receiving an auxiliary base station adding request confirmation message sent by the auxiliary base station, and then sending a PDU session resource establishment response message to the core network equipment, wherein the PDU session resource establishment response message carries indication information.

In one possible design, the sending, by the master base station, the indication information to the core network device includes:

the master base station sends a PDU session resource modification indication message to the core network equipment, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the method further comprises the following steps:

and the master base station receives a PDU session resource modification confirmation message sent by the core network equipment.

The data transmission method provided by the application can also be applied to the scenes that the PDU session resources are established and the dual connection is established. In this scenario, the indication information may be carried in a PDU session resource modification indication message sent by the primary base station to the core network device.

and the master base station sends a PDU session resource notification message to the core network equipment, wherein the PDU session resource notification message carries the indication information.

When the data transmission method provided by the application is applied to a scene that the PDU session resource is established and the dual connection is established, the indication information can be carried in a PDU session resource modification notification message sent by the main base station to the core network equipment.

In one possible design, the method further includes:

the main base station sends a secondary base station modification request message to the secondary base station, wherein the secondary base station modification request message carries the indication information;

and the main base station receives a secondary base station modification request confirmation message sent by the secondary base station.

In the embodiment of the present application, the primary base station sends a PDU session resource modification indication message or a PDU session resource modification notification message to the core network device, where the PDU session resource modification indication message or the PDU session resource modification notification message may be sent after receiving a secondary base station modification request acknowledgement message sent by a secondary base station after a secondary base station modification process is initiated by the primary base station.

In one possible design, the method further includes:

the main base station receives an auxiliary base station modification request message sent by the auxiliary base station, wherein the auxiliary base station modifier request message carries the indication information;

and the main base station sends a secondary base station modification request confirmation message to the secondary base station.

In the embodiment of the present application, the primary base station sends a PDU session resource modification indication message or a PDU session resource modification notification message to the core network device, where the PDU session resource modification indication message or the PDU session resource modification notification message may be sent after the secondary base station initiates a secondary base station modification process and sends a secondary base station modification request acknowledgement message to the secondary base station.

In a second aspect, the present application provides a data transmission method, including:

the core network equipment receives indication information sent by a main base station, wherein the indication information is used for indicating a first node where a default Data Radio Bearer (DRB) is located;

the core network equipment receives uplink data sent by the first node; wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from the first node, where the first node is the primary base station or the secondary base station.

In one possible design, the method further includes: the method for receiving the indication information sent by the main base station by the core network equipment comprises the following steps:

and the core network equipment receives a PDU session resource establishment response message sent by the main base station, wherein the PDU session resource establishment response message carries the indication information.

In one possible design, the receiving, by the core network device, the indication information sent by the main base station includes:

the core network equipment receives a PDU session resource modification indication message sent by the main base station, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the method further comprises the following steps:

and the core network equipment sends a PDU session resource modification confirmation message to the main base station.

and the core network equipment receives a PDU session resource notification message sent by the main base station, wherein the PDU session resource notification message carries the indication information.

In a third aspect, an embodiment of the present application further provides a device for a data transmission method, where the device includes:

a memory to store instructions;

a processor for reading the instructions stored in the memory and performing the following processes:

determining a first node where a default Data Radio Bearer (DRB) is located;

a control transmitter transmits indication information to core network equipment, wherein the indication information is used for indicating a first node where the default DRB is located, so that the core network equipment receives uplink data transmitted by the first node;

wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established at a second node different from the first node, where the first node is the apparatus or the secondary base station.

In one possible design, the apparatus further includes:

a receiver, configured to receive a protocol data unit PDU session resource establishment request message sent by the core network device;

when the processor controls the transmitter to transmit the indication information to the core network device, the method is specifically configured to:

and controlling the sender to send a PDU session resource establishment response message to the core network equipment, wherein the PDU session resource establishment response message carries the indication information.

In one possible design, when the processor controls the transmitter to transmit the indication information to the core network device, the processor is specifically configured to:

controlling the sender to send a PDU session resource modification indication message to the core network equipment, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the receiver is further configured to:

and receiving a PDU session resource modification confirmation message sent by the core network equipment.

and controlling the sender to send a PDU session resource notification message to the core network equipment, wherein the PDU session resource notification message carries the indication information.

In one possible design, the transmitter is further to:

sending an auxiliary base station modification request message to the auxiliary base station, wherein the auxiliary base station modification request message carries the indication information;

the receiver is further configured to:

and receiving a secondary base station modification request confirmation message sent by the secondary base station.

In one possible design, the receiver is further to:

receiving an auxiliary base station modification request message sent by the auxiliary base station, wherein the auxiliary base station modifier request message carries the indication information;

the transmitter is further configured to:

and sending a secondary base station modification request confirmation message to the secondary base station.

In a fourth aspect, the present application further provides a device of a data transmission method, including:

a memory to store instructions;

the control receiver receives indication information sent by a main base station, wherein the indication information is used for indicating a first node where a default Data Radio Bearer (DRB) is located; and

receiving uplink data sent by the first node; wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from the first node, where the first node is the primary base station or the secondary base station.

In one possible design, when the processor controls the receiver to receive the indication information sent by the master base station, the processor is specifically configured to:

and controlling the receiver to receive a PDU session resource establishment response message sent by the master base station, wherein the PDU session resource establishment response message carries the indication information.

receiving a PDU session resource modification indication message sent by the master base station, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the device further comprises:

a transmitter for transmitting a PDU session resource modification acknowledgement message to the primary base station.

and controlling the receiver to receive a PDU session resource notification message sent by the main base station, wherein the PDU session resource notification message carries the indication information.

In a fifth aspect, the present application further provides a device of a data transmission method, including:

a determining unit, configured to determine a first node where a default data radio bearer DRB is located;

a sending unit, configured to send indication information to a core network device, where the indication information is used to indicate a first node where the default DRB is located, so that the core network device receives uplink data sent by the first node;

In one possible design, the apparatus further includes:

a receiving unit, configured to receive a protocol data unit PDU session resource establishment request message sent by the core network device;

when the sending unit sends the indication information to the core network device, the sending unit is specifically configured to:

and sending a PDU session resource establishment response message to the core network equipment, wherein the PDU session resource establishment response message carries the indication information.

In a possible design, when the sending unit sends the indication information to the core network device, the sending unit is specifically configured to:

sending a PDU session resource modification indication message to the core network equipment, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the receiving unit is further configured to:

and sending a PDU session resource notification message to the core network equipment, wherein the PDU session resource notification message carries the indication information.

In one possible design, the sending unit is further configured to:

the receiving unit is further configured to:

In one possible design, the receiving unit is further configured to:

the sending unit is further configured to:

In a sixth aspect, the present application further provides a device of a data transmission method, including:

a first receiving unit, configured to receive indication information sent by a master base station, where the indication information is used to indicate a first node where a default DRB is located;

a second receiving unit, configured to receive uplink data sent by the first node; wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from the first node, where the first node is the primary base station or the secondary base station.

In a possible design, when the first receiving unit receives the indication information sent by the master base station, the first receiving unit is specifically configured to:

receiving a PDU session resource establishment response message sent by the master base station, wherein the PDU session resource establishment response message carries the indication information.

correspondingly, the device further comprises:

a sending unit, configured to send a PDU session resource modification acknowledgement message to the master base station.

receiving a PDU session resource notification message sent by the master base station, wherein the PDU session resource notification message carries the indication information.

In a seventh aspect, the present application further provides a computer storage medium storing computer software instructions for executing the functions of any one of the first aspect, the second aspect, and the second aspect, or a program related to a method for executing any one of the first aspect, the second aspect, and the second aspect.

In an eighth aspect, the present application further provides a computer program product, which when invoked by a computer, can cause the computer to perform the method of any of the first aspect, the first design method, the second aspect, and the second design method.

Drawings

FIG. 1 is a diagram illustrating PDU session separation under dual connectivity in the prior art;

fig. 2 is a schematic diagram of an application scenario provided in the present application;

fig. 3 is a schematic flowchart of a data transmission method provided in the present application;

fig. 4A and fig. 4B are schematic flow charts of a data transmission method provided in the present application;

fig. 5A and 5B are schematic flow charts of a data transmission method provided in the present application;

fig. 6A and fig. 6B are schematic flow charts of a data transmission method provided in the present application;

fig. 7A and fig. 7B are schematic flow charts of a data transmission method provided in the present application;

fig. 8A and fig. 8B are schematic flow charts of a data transmission method provided in the present application;

fig. 9 is a schematic structural diagram of an apparatus of a data transmission method provided in the present application;

fig. 10 is a schematic diagram of a structure of an apparatus of a data transmission method provided in the present application;

fig. 11 is a schematic diagram illustrating a structure of an apparatus of a data transmission method provided in the present application;

fig. 12 is a schematic diagram of a structure of an apparatus of a data transmission method provided in the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The technical solution described herein can be applied to a fifth generation mobile communication technology (5G) system, and can also be applied to a next generation mobile communication system.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) The primary and secondary base stations may be, for example, devices including base stations (e.g., access points), which may refer to devices in the access network that communicate over the air interface with wireless terminal devices through one or more cells. The base station may be configured to interconvert received air frames and IP packets as a router between the terminal device and the rest of the access network, which may include an IP network. The base station may also coordinate management of attributes for the air interface. For example, the base station may include an evolved Node B (NodeB or eNB or e-NodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-a), or may also include a next generation Node B (gNB) in a 5G system, which is not limited in the embodiments of the present application.

(2) Terminal equipment, including devices that provide voice and/or data connectivity to a user, may include, for example, handheld devices with wireless connection capability or processing devices connected to wireless modems. The terminal device may communicate with a core Network via a Radio Access Network (RAN), and exchange voice and/or data with the RAN. The Terminal Device may include a User Equipment (UE), a wireless Terminal Device, a Mobile Terminal Device, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (AP), a Remote Terminal Device (Remote Terminal), an Access Terminal Device (Access Terminal), a User Terminal Device (User Terminal), a User Agent (User Agent), or a User Equipment (User Device), etc. For example, mobile phones (or so-called "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included or vehicle-mounted mobile devices, smart wearable devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), smart watches, smart helmets, smart glasses, smart bracelets, and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Including, for example, bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and other information sensing devices.

(3) The Core Network device may be a Next Generation Core Network (NGC) Network element, or a 5G Core Network (5G-CN) device, or other Core Network devices, where the NGC Network element may include, for example, a Control Panel (CP) Network element and a User Plane (UP) Network element. In the present application, the "core network device" may be simply referred to as a "core network".

(4) A PDU session, one PDU session may comprise one or more QoS flows. The QoS flow included in one PDU session may be mapped to a plurality of DRBs, and the uplink mapping relationship and the downlink mapping relationship between the QoS flow and the DRBs may be consistent or inconsistent. In case of inconsistency, the uplink mapping relationship between the QoS flow and the DRB may be configured to the terminal device by a Radio Access Network (RAN) through a Radio Resource Control (RRC) display signaling of a Control plane. Under the condition of consistency, the terminal device may obtain the uplink mapping relationship according to the downlink mapping relationship when transmitting the downlink data according to a reflection mirror mapping qos (reflective qos) mechanism.

The uplink mapping relationship between the QoS flow and the DRB may be represented by a QoS ID and a DRB Identification (ID), where the DRB ID is used to identify the DRB. In the specific implementation process, after the base station establishes the uplink mapping relationship between the QoS flow and the DRB, the base station stores the uplink mapping relationship between the QoS flow and the DRB, and notifies the terminal device of the established DRB and the uplink mapping relationship between the QoS flow and the DRB.

(5) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Please refer to fig. 2, which is an application scenario of the embodiment of the present application. Fig. 2 includes a terminal device, a primary base station, a secondary base station, and a core network. The core network communicates with the primary base station and the secondary base station respectively through PDU sessions, and one PDU session can comprise a plurality of QoS flows.

The technical solution provided by the embodiment of the present application is described below with reference to the accompanying drawings, and in the following description, the technical solution provided by the present application is applied to the application scenario shown in fig. 2 as an example.

Referring to fig. 3, an embodiment of the present application provides a method for data transmission, where the flow of the method is described as follows:

s301: the main base station determines a first node where a default Data Radio Bearer (DRB) is located;

in this embodiment, the first node may be a primary base station or a secondary base station, that is, the primary base station may determine to establish the default DRB on the primary base station or may establish the default DRB on the secondary base station. The main base station may determine to establish the default DRB on the main base station or the secondary base station by itself, or may determine to establish the default DRB on the main base station or the secondary base station under the instruction of the secondary base station. For example, the primary base station receives a secondary base station modification request message sent by the secondary base station, and the secondary base station modification request message carries a first node for indicating where the default DRB is located, which will be described in detail below.

S302: the master base station sends indication information to core network equipment, wherein the indication information is used for indicating a first node where the default DRB is located, so that the core network equipment receives uplink data sent by the first node; the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from a first node, where the first node is the primary base station or the secondary base station.

In the embodiment of the application, when the main base station determines to establish the default DRB on the main base station, the indication information is sent to the core network device, and is used for indicating that the default DRB is located on the main base station, so that the core network device receives uplink data which needs the default DRB bearer and is established on the auxiliary base station by a GTP channel of a corresponding QoS flow;

and if the main base station determines to establish the default DRB on the auxiliary base station, sending indication information to the core network equipment for indicating that the default DRB is positioned on the auxiliary base station, so that the core network equipment receives uplink data which needs the default DRB to bear, and the GTP channel of the corresponding QoS flow is established on the main base station.

By the technical scheme provided by the application, the technical problem that uplink data which needs to be borne by the default DRB and corresponds to the GPT channel established at the node where the non-default DRB is located cannot be transmitted to the core network in the prior art can be solved, and therefore the success rate of transmitting the data to the core network equipment is improved.

The data transmission method provided by the application can be applied to various application scenes, for example, a PDU session resource establishment scene, or a scene in which PDU session resources are established and dual connection is established. In the scenario where the PDU session resource is already established and the dual connectivity is already established, the primary base station may initiate the secondary base station modification process, or the secondary base station may initiate the secondary base station modification request process, which is described below.

PDU conversation resource establishment

Referring to fig. 4A and 4B, the flow of the method is described generally as follows:

s401: the core network equipment sends a PDU session resource establishment request message to the main base station to request the main base station to establish PDU session resources;

s402: the main base station sends an auxiliary base station adding request message to the auxiliary base station, wherein the auxiliary base station adding request message carries a node for indicating the default DRB;

after receiving a PDU session resource establishment request message sent by core network equipment, the main base station determines to establish dual connectivity according to a management rule and determines whether to establish the default DRB on the main base station or the auxiliary base station. And then sending a secondary base station adding request message to the secondary base station, wherein the secondary base station adding request message carries information for indicating whether the default DRB is positioned on the main base station or the secondary base station.

S403: the auxiliary base station sends an auxiliary base station addition request confirmation message to the main base station;

in this embodiment of the present application, when the default DRB is located on the secondary base station, the secondary base station establishes the default DRB while sending the secondary base station addition request acknowledgement message to the primary base station.

S404: the main base station sends a PDU session resource establishment response message to the core network equipment, wherein the PDU session resource establishment response message carries indication information and is used for indicating a first node where the default DRB is located so that the core network equipment receives uplink data which needs the default DRB to bear and is established on a second node different from the first node by a GTP channel corresponding to the QoS flow;

in this embodiment, when the primary base station receives the secondary base station addition request acknowledgement message sent by the secondary base station, if the default DRB is located on the primary base station, the primary base station establishes the default DRB.

In this embodiment, the first node may be a primary base station or a secondary base station. When the first node is a primary base station, the second node may be a secondary base station; when the first node is a secondary base station, the second node may be a primary base station.

In the method, the following is divided into two cases, and when the first node is a master base station and the second node is a secondary base station, the method further includes steps of step S405a and step S406 a:

s405 a: the terminal equipment sends uplink data to the main base station, the uplink data needs to be carried by a default DRB, and a GTP channel of a QoS flow of the uplink data is established on the auxiliary base station;

s406 a: and the main base station transmits uplink data to the core network equipment.

When the first node is the secondary base station and the second node is the primary base station, the method further includes steps that may be S405b and S406 b:

s405 b: the terminal equipment sends uplink data to the secondary base station, the uplink data needs to be carried by a default DRB, and a GTP channel of the QoS flow of the uplink data is established on the primary base station;

s406 b: and the auxiliary base station sends uplink data to the core network equipment.

Initiating a secondary base station modification process by a main base station under the scene of establishing PDU session resources and double connections

1. Referring to fig. 5A and 5B, the flow of the method is described generally as follows:

s501: the main base station sends a secondary base station modification request message to a secondary base station, wherein the secondary base station modification request message carries indication information and is used for indicating a first node where the default DRB is located;

under the condition that PDU session resources and dual connectivity are established, the main base station can initiate a secondary base station modification process to modify the establishment position of the default DRB, and can be established on the main base station or the secondary base station. In a specific implementation process, the primary base station sends a secondary base station modification request message to the secondary base station, and the secondary base station modification request message carries indication information to indicate a first node where the default DRB is located.

S502: the auxiliary base station sends an auxiliary base station modification request confirmation message to the main base station;

in the embodiment of the present application, when the default DRB is established on the secondary base station, the secondary base station sends the secondary base station modification request acknowledgement message to the primary base station and establishes the default DRB at the same time.

S503: the main base station sends a PDU session resource modification indication message to the core network equipment, and the PDU session resource modification indication message carries indication information. The indication information carried in the PDU session resource modification indication message is used for indicating a first node where the default DRB is located, so that the core network equipment receives the bearer which needs the default DRB, and a GTP channel corresponding to the QoS flow of the uplink data is established on a second node different from the first node;

in the embodiment of the present application, if the default DRB is established on the primary base station, the default DRB is established when the primary base station receives a PDU session resource modification indication message sent by the secondary base station.

S504: a PDU session resource modification confirmation message sent by the core network equipment to the main base station;

In the method, the following is divided into two cases, and when the first node is a master base station and the second node is a secondary base station, the method further includes steps of step S505a and step S506 a:

s505 a: the terminal equipment sends uplink data to the main base station, the uplink data needs to be carried by a default DRB, and a GTP channel of a QoS flow of the uplink data is established on the auxiliary base station;

s506 a: and the main base station transmits uplink data to the core network equipment.

When the first node is the secondary base station and the second node is the primary base station, the method further includes steps of S505b and S506 b:

s505 b: the terminal equipment sends uplink data to the secondary base station, the uplink data needs to be carried by a default DRB, and a GTP channel of the QoS flow of the uplink data is established on the primary base station;

s506 b: and the auxiliary base station sends uplink data to the core network equipment.

2. Referring to fig. 6A and 6B, the flow of the method is described generally as follows:

s601: the main base station sends a secondary base station modification request message to a secondary base station, wherein the secondary base station modification request message carries indication information and is used for indicating a first node where the default DRB is located;

S602: the auxiliary base station sends an auxiliary base station modification request confirmation message to the main base station;

S603: the main base station sends a PDU conversation resource modification notification message to the core network equipment, and the PDU conversation resource modification indication message carries indication information. The indication information carried in the PDU session resource modification indication message is used for indicating a first node where the default DRB is located, so that the core network equipment receives the bearer which needs the default DRB, and a GTP channel corresponding to the QoS flow of the uplink data is established on a second node different from the first node;

In the method, the following is divided into two cases, and when the first node is a master base station and the second node is a secondary base station, the method further includes steps of S604a and S605 a:

s604 a: the terminal equipment sends uplink data to the main base station, the uplink data needs to be carried by a default DRB, and a GTP channel of a QoS flow of the uplink data is established on the auxiliary base station;

s605 a: and the main base station transmits uplink data to the core network equipment.

When the first node is the secondary base station and the second node is the primary base station, the method further includes steps of S604b and S605 b:

s604 b: the terminal equipment sends uplink data to the secondary base station, the uplink data needs to be carried by a default DRB, and a GTP channel of the QoS flow of the uplink data is established on the primary base station;

s605 b: and the auxiliary base station sends uplink data to the core network equipment.

Initiating a secondary base station modification process by the secondary base station under the scene of establishing PDU session resources and double connections

1. Referring to fig. 7A and 7B, the flow of the method is described generally as follows:

s701: the auxiliary base station sends an auxiliary base station modification request message to the main base station, wherein the auxiliary base station modification request message carries indication information and is used for indicating a first node where the default DRB is located;

in the case that PDU session resources and dual connectivity have been established, the secondary base station may initiate a secondary base station modification procedure to modify the establishment location of the default DRB to be established on the primary base station or on the secondary base station. And then transmits a secondary base station modification request message to the primary base station. In a specific implementation process, the secondary base station sends a secondary base station modification request message to the primary base station, and the secondary base station modification request message carries indication information to indicate a first node where the default DRB is located.

S702: the main base station sends a secondary base station modification request confirmation message to the secondary base station;

in the embodiment of the present application, if the default DRB is established on the primary base station, the primary base station sends the secondary base station modification request acknowledgement message to the secondary base station, and at the same time, the default DRB is established. Correspondingly, if the default DRB is established on the secondary base station, the default DRB is established when the secondary base station receives the secondary base station modification request acknowledgement message sent by the primary base station.

S703: the main base station sends a PDU session resource modification indication message to the core network equipment, and the PDU session resource modification indication message carries indication information. The indication information carried in the PDU session resource modification indication message is used for indicating a first node where the default DRB is located, so that the core network equipment receives the bearer which needs the default DRB, and a GTP channel corresponding to the QoS flow of the uplink data is established on a second node different from the first node;

s704: the main base station receives a PDU session resource modification confirmation message sent by core network equipment;

in the embodiment of the present application, the first node may be a primary base station and may be a secondary base station. The second node may be a secondary base station when the first node is a primary base station, and the second node may be a primary base station when the first node is a secondary base station.

In the method, the following is divided into two cases, and when the first node is a master base station and the second node is a secondary base station, the method further includes steps of S705a and S706 a:

s705 a: the terminal equipment sends uplink data to the main base station, the uplink data needs to be carried by a default DRB, and a GTP channel of a QoS flow of the uplink data is established on the auxiliary base station;

s706 a: and the main base station transmits uplink data to the core network equipment.

When the first node is the secondary base station and the second node is the primary base station, the method further includes steps of S705b and S706 b:

s705 b: the terminal equipment sends uplink data to the secondary base station, the uplink data needs to be carried by a default DRB, and a GTP channel of the QoS flow of the uplink data is established on the primary base station;

s706 b: and the auxiliary base station sends uplink data to the core network equipment.

2. Referring to fig. 8A and 8B, the flow of the method is described generally as follows:

s801: the auxiliary base station sends an auxiliary base station modification request message to the main base station, wherein the auxiliary base station modification request message carries indication information and is used for indicating a first node where the default DRB is located;

S802: the main base station sends a secondary base station modification request confirmation message to the secondary base station;

S803: the main base station sends a PDU conversation resource modification notification message to the core network equipment, and the PDU conversation resource modification indication message carries indication information. The indication information carried in the PDU session resource modification indication message is used for indicating a first node where the default DRB is located, so that the core network equipment receives the bearer which needs the default DRB, and a GTP channel corresponding to the QoS flow of the uplink data is established on a second node different from the first node;

In the method, the following is divided into two cases, and when the first node is a master base station and the second node is a secondary base station, the method further includes steps of S804a and S805 a:

s804 a: the terminal equipment sends uplink data to the main base station, the uplink data needs to be carried by a default DRB, and a GTP channel of a QoS flow of the uplink data is established on the auxiliary base station;

s805 a: and the main base station transmits uplink data to the core network equipment.

When the first node is the secondary base station and the second node is the primary base station, the method further includes steps of S804b and S805 b:

s804 b: the terminal equipment sends uplink data to the secondary base station, the uplink data needs to be carried by a default DRB, and a GTP channel of the QoS flow of the uplink data is established on the primary base station;

s805 b: and the auxiliary base station sends uplink data to the core network equipment.

The device provided by the embodiment of the application is described in the following with the accompanying drawings of the specification.

Referring to fig. 9, based on the same inventive concept, an embodiment of the present application provides an apparatus 900 for a data transmission method, where in one implementation of the apparatus 900, the apparatus includes a processor 901, a transmitter 902, a receiver 903, and a memory 904. A transmitter 902, a receiver 903 and a memory 904 are coupled to the processor 901. The processor 901 may be a Central Processing Unit (CPU), an application-specific integrated circuit (ASIC), one or more integrated circuits for controlling program execution, a baseband chip, or the like. The number of memories may be one or more, and the memories may be read-only memories (ROMs), Random Access Memories (RAMs), or disk memories, etc.

By programming the processor 901, the code corresponding to the aforementioned information sending method can be solidified into the chip, so that the chip can execute the following steps when running:

determining a first node where a default Data Radio Bearer (DRB) is located;

the control transmitter 902 transmits indication information to a core network device, where the indication information is used to indicate a first node where the default DRB is located, so that the core network device receives uplink data transmitted by the first node;

In one possible design, the apparatus further includes:

a receiver 903, configured to receive a protocol data unit PDU session resource establishment request message sent by the core network device, so as to instruct the core network device to establish a PDU session;

when the processor 901 controls the transmitter to transmit the indication information to the core network device, the following steps are specifically performed:

and controlling the sender 902 to send a PDU session resource establishment response message to the core network device, where the PDU session resource establishment response message carries the indication information.

In one possible design, when the processor 901 controls the transmitter 902 to transmit the indication information to the core network device, the method is specifically configured to:

controlling the sender 902 to send a PDU session resource modification indication message to the core network device, where the PDU session resource modification indication message carries the indication information;

correspondingly, the receiver 903 is further configured to:

and controlling the sender 902 to send a PDU session resource notification message to the core network device, where the PDU session resource notification message carries the indication information.

In one possible design, the transmitter 902 is further configured to:

the receiver 903 is further configured to:

In one possible design, the receiver 903 is further configured to:

the transmitter 902 is further configured to:

Referring to fig. 10, the present application further provides an apparatus 1000 for a data transmission method, where in one embodiment of the apparatus 1000, the apparatus includes a processor 1001, a receiver 1002, a transmitter 1003, and a memory 1004. The receiver 1002, the transmitter 1003 and the memory 1004 are coupled to the processor 1001. The processor 1001 may be a Central Processing Unit (CPU), an application-specific integrated circuit (ASIC), one or more integrated circuits for controlling program execution, a baseband chip, or the like. The number of memories may be one or more, and the memories may be read-only memories (ROMs), Random Access Memories (RAMs), or disk memories, etc.

By programming the processor 1001, the code corresponding to the aforementioned information transmission method may be solidified into the chip, so that the chip can execute the following steps during operation:

the control receiver 1002 receives indication information sent by the master base station, where the indication information is used to indicate a first node where the default DRB is located; and

In one possible design, when the processor 1001 controls the receiver 1002 to receive the indication information sent by the master base station, specifically, the processor is configured to:

and controlling the receiver 1002 to receive a PDU session resource establishment response message sent by the master base station, where the PDU session resource establishment response message carries the indication information.

correspondingly, the device further comprises:

a transmitter 1003 configured to transmit a PDU session resource modification acknowledgement message to the primary base station.

and controlling the receiver 1002 to receive a PDU session resource notification message sent by the master base station, where the PDU session resource notification message carries the indication information.

Referring to fig. 11, the present application further provides an apparatus 1100 of a data transmission method, including:

a determining unit 1101, configured to determine a first node where a default data radio bearer DRB is located;

a sending unit 1102, configured to send indication information to a core network device, where the indication information is used to indicate a first node where the default DRB is located, so that the core network device receives uplink data sent by the first node;

In one possible design, the apparatus further includes:

a receiving unit 1103, configured to receive a protocol data unit PDU session resource establishment request message sent by the core network device, so as to instruct the core network device to establish a PDU session;

when the sending unit 1102 sends the indication information to the core network device, the sending unit is specifically configured to:

In a possible design, when the sending unit 1102 sends the indication information to the core network device, the sending unit is specifically configured to:

correspondingly, the receiving unit 1103 is further configured to:

In one possible design, the sending unit 1102 is further configured to:

the receiving unit 1103 is further configured to:

In one possible design, the receiving unit 1103 is further configured to:

the sending unit 1102 is further configured to:

Referring to fig. 12, the present application further provides a device 1200 of a data transmission method, including:

a first receiving unit 1201, configured to receive indication information sent by a master base station, where the indication information is used to indicate a first node where a default DRB is located;

a second receiving unit 1202, configured to receive uplink data sent by the first node; wherein the uplink data needs to be carried by the default DRB, and a gprs GTP tunnel corresponding to a QoS flow of the uplink data is established in a second node different from the first node, where the first node is the primary base station or the secondary base station.

In one possible design, when the first receiving unit 1201 receives the indication information sent by the master base station, it is specifically configured to:

correspondingly, the device further comprises:

a sending unit 1203, configured to send a PDU session resource modification acknowledgement message to the primary base station.

The present application also provides a computer storage medium, which may include a memory, where the memory may store a program, and the program includes all the steps executed by the master base station and the core network device as described in the method embodiment shown in fig. 2.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of data transmission, comprising:

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein the sending, by the master base station, the indication information to the core network device comprises:

correspondingly, the method further comprises the following steps:

4. The method of claim 1, wherein the sending, by the master base station, the indication information to the core network device comprises:

5. The method according to claim 3 or 4, characterized in that the method further comprises:

6. The method according to claim 3 or 4, characterized in that the method further comprises:

7. A method of data transmission, comprising:

8. The method of claim 7, wherein the receiving, by the core network device, the indication information sent by the master base station includes:

9. The method of claim 7, wherein the receiving, by the core network device, the indication information sent by the master base station includes:

correspondingly, the method further comprises the following steps:

10. The method of claim 7, wherein the receiving, by the core network device, the indication information sent by the master base station includes:

11. An apparatus of a data transmission method, comprising:

a memory to store instructions;

determining a first node where a default Data Radio Bearer (DRB) is located;

12. The apparatus of claim 11, further comprising:

13. The apparatus according to claim 11, wherein when the processor controls the transmitter to transmit the indication information to the core network device, the apparatus is specifically configured to:

correspondingly, the device further comprises:

a receiver: and the device is used for receiving the PDU session resource modification confirmation message sent by the core network equipment.

14. The apparatus according to claim 11, wherein when the processor controls the transmitter to transmit the indication information to the core network device, the apparatus is specifically configured to:

15. The apparatus of claim 13 or 14, wherein the transmitter is further configured to:

the device further comprises:

a receiver: and the secondary base station modification request confirmation message is used for receiving the secondary base station modification request confirmation message sent by the secondary base station.

16. The apparatus of claim 13 or 14, further comprising:

a receiver: the secondary base station modifying request message is used for receiving a secondary base station modifying request message sent by the secondary base station, and the secondary base station modifier request message carries the indication information;

the transmitter is further configured to:

17. An apparatus of a data transmission method, comprising:

a memory to store instructions;

18. The apparatus according to claim 17, wherein when the processor controls the receiver to receive the indication information transmitted by the master base station, the processor is specifically configured to:

19. The apparatus according to claim 17, wherein when the processor controls the receiver to receive the indication information transmitted by the master base station, the processor is specifically configured to:

controlling the receiver to receive a PDU session resource modification indication message sent by the master base station, wherein the PDU session resource modification indication message carries the indication information;

correspondingly, the device further comprises:

20. The apparatus according to claim 17, wherein when the processor controls the receiver to receive the indication information transmitted by the master base station, the processor is specifically configured to:

21. An apparatus of a data transmission method, comprising:

22. An apparatus of a data transmission method, comprising:

a first receiving unit, configured to receive indication information sent by a master base station, where the indication information is used to indicate a first node where a default data radio bearer DRB is located;

23. A computer storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-6 or 7-10.