WO2020097850A1

WO2020097850A1 - Method and apparatus for transmitting data

Info

Publication number: WO2020097850A1
Application number: PCT/CN2018/115628
Authority: WO
Inventors: 尤心; 卢前溪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2020-05-22
Also published as: CN111989949B; CN111989949A

Abstract

A method and apparatus for transmitting data. In a switching process, a terminal is switched from a first transmission mode to a second transmission mode upon performing data transmission. In one of the two transmission modes, the terminal is simultaneously connected to a first access network device and a second access network device (101), such that uplink data or downlink data can be transmitted among the terminal, the first access network device and the second access network device, thereby supporting simultaneous connectivity for data transmission in a switching process.

Description

Data transmission method and device

Technical field

The invention relates to wireless communication technology, in particular to a data transmission method and device.

Background technique

In the existing handover process, the terminal and the access network device maintain a set of protocol stacks at the same time, and also correspond to only one Packet Data Convergence Protocol (PDCP) entity. The terminal is either connected to the source access network device and only maintains the protocol stack with the source access network device for data transmission with the source access network device, or is connected to the target access network device and maintains only the target access network device Protocol stack, data transmission with target access network equipment.

In New Radio (NR) systems such as 5G applications, in order to reduce the switching delay, a new switching method, Simultaneous Connectivity switching method is proposed. In this switching method, the terminal can simultaneously communicate with The source access network device and the target access network device are connected to maintain a protocol stack with the source access network device and a protocol stack with the target access network device, respectively.

Therefore, there is an urgent need to provide a data transmission method to realize data transmission in the simultaneous connection switching mode.

Summary of the invention

Various aspects of the present invention provide a data transmission method and device for implementing data transmission in a simultaneous connection switching mode.

An aspect of the present invention provides a data transmission method, including:

During the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode.

Another aspect of the present invention provides a data transmission device, including:

The switching unit is configured to switch the transmission data of the terminal from the first transmission mode to the second transmission mode during the switching process.

It can be seen from the above technical solution that in the embodiment of the present invention, by switching the transmission data of the terminal from the first transmission mode to the second transmission mode during the handover process, one of the transmission modes is to simultaneously connect two access network devices, namely the first For the access network device and the second access network device, uplink data or downlink data is transmitted between the terminal, the first access network device, and the second access network device, thereby realizing data in the simultaneous connection switching mode transmission.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are of the present invention. In some embodiments, for those of ordinary skill in the art, without paying creative labor, other drawings may be obtained based on these drawings.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

2 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention

detailed description

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In addition, the term "and / or" in this article is just an association relationship that describes the related objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects before and after are in an "or" relationship.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention, as shown in FIG. 1.

101. During the switching process, switch the transmission data of the terminal from the first transmission mode to the second transmission mode.

Wherein, the first transmission mode may be a transmission mode used for data transmission when the terminal is connected to the first access network device, and the second transmission mode may be the terminal and the first access network at the same time When the device is connected to the second access network device, the transmission mode used for data transmission.

The second access network device may be one access network device, or may also be multiple access network devices, which is not particularly limited in this embodiment.

For example, if the HO command contains multiple second access network devices, then the access signal with the strongest signal among the multiple second access network devices may be selected for data transmission, or it may be directly selected All the access network devices in the plurality of second access network devices perform data transmission.

It should be noted that the access network equipment involved in the present invention may be an evolved base station (Evolved) in the Evolved Universal Mobile Communication System Terrestrial Radio Access Network (Evolved Universal Mobile Telecommunication System Territorial Access Network, E-UTRAN) NodeB, eNB), or may also be a 5G base station in the next generation radio access network (Next-Generation-Radio Access Network, NG-RAN), that is, gNB, etc. This embodiment is not particularly limited.

Optionally, in a possible implementation manner of this embodiment, the first access network device may be a source access network device, and the second access network device may be a target access network device, this implementation This example is not particularly limited.

The core idea of the present invention is that in the simultaneous connection (Simultaneous Connectivity) switching mode, the terminal can simultaneously maintain the protocol stacks with the source access network device and the target access network device, respectively. The transmission data is switched from the first transmission mode to the second transmission mode. One of the transmission modes is to simultaneously connect two access network devices, namely the first access network device and the second access network device. Uplink data or downlink data is transmitted between the network access device and the second access network device, thereby achieving data transmission in the simultaneous connection switching mode.

Optionally, in a possible implementation manner of this embodiment, the data transmission entity of the first transmission mode may include but is not limited to at least one of the following entities: the terminal, the protocol entity in the terminal , The first access network device, the protocol entity in the first access network device, the second access network device and the protocol entity in the second access network device; accordingly, the data transmission entity of the second transmission mode It may include but is not limited to at least one of the following entities: the terminal, the protocol entity in the terminal, the first access network device, the protocol entity in the first access network device, the second access network device and The protocol entity in the second access network device is not particularly limited in this embodiment.

Optionally, in a possible implementation manner of this embodiment, the data receiving entity of the first transmission mode may include but is not limited to at least one of the following entities: the terminal, a protocol entity in the terminal , The first access network device, the protocol entity in the first access network device, the second access network device and the protocol entity in the second access network device; accordingly, the data receiving entity of the second transmission mode May include but not limited to at least one of the following entities: terminal, protocol entity in terminal, first access network device, protocol entity in first access network device, second access network device and second access The protocol entity in the network device is not particularly limited in this embodiment.

Optionally, in a possible implementation manner of this embodiment, if the data receiving entity changes from the first access network device to the first access network device and / or the second access Network device, then the terminal may perform uplink data transmission with the first access network device, or may also perform uplink data transmission with the second access network device, which is not particularly limited in this embodiment.

In a specific implementation process, the terminal may specifically send the first uplink data to the first access network device. At this time, the first access network device may send the first uplink data to the second access network device through the X2 interface or the first receiving protocol entity of the first access network device.

The first receiving protocol entity of the first access network device may include, but is not limited to, a physical (PHY) layer protocol entity, a media access control (Media Access Control, MAC) layer protocol entity, and a wireless link control ( Ratio Link Control (RLC) layer protocol entity and Packet Data Convergence Protocol (PDCP) layer protocol entity, at least one of which is not specifically limited in this embodiment.

For example, the first receiving protocol entities are a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in this order from bottom to top.

For example, the terminal may specifically send the first uplink data to the first access network device. At this time, after successfully receiving the first uplink data, the first access network device may send the first uplink data to the second access network device through the X2 interface.

Or, for another example, taking the first receiving protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The terminal may specifically send the first uplink data to the first access network device. At this time, the first access network device may send the first uplink data to the second access network device through the RLC layer protocol entity of the first access network device.

In another specific implementation process, the terminal may specifically send the first uplink data to the second access network device. At this time, the second access network device may send the first uplink data to the first access network device through the X2 interface or the first receiving protocol entity of the second access network device.

The second receiving protocol entity of the second access network device may include, but is not limited to, a physical (PHY) layer protocol entity, a media access control (Media Access Control, MAC) layer protocol entity, and a wireless link control ( Ratio Link Control (RLC) layer protocol entity and Packet Data Convergence Protocol (PDCP) layer protocol entity, at least one of which is not specifically limited in this embodiment.

For example, the second receiving protocol entities are, in order from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity.

For example, the terminal may specifically send second uplink data to the second access network device. At this time, after successfully receiving the second uplink data, the second access network device may send the second uplink data to the first access network device through the X2 interface.

Or, for another example, taking the second receiving protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The terminal may specifically send the first uplink data to the second access network device. At this time, the second access network device may send the second uplink data to the first access network device through the RLC layer protocol entity of the second access network device.

In another specific implementation process, the terminal may specifically send the first uplink data to the first access network device. At this time, the first receiving protocol entity of the first access network device copies the first uplink data after successfully receiving the first uplink data, and then, the first access network device may The receiving protocol entity sends the first uplink data to the upper layer receiving protocol entity of the first receiving protocol entity of the first access network device and the second access network device, respectively.

For example, taking the first receiving protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The terminal may specifically send the first uplink data to the first access network device. At this time, the RLC layer protocol entity of the first access network device copies the first uplink data after successfully receiving the first uplink data, and then, the RLC layer protocol of the first access network device The entity sends the first uplink data to the PDCP layer protocol entity of the first access network device and the second access network device, respectively.

In another specific implementation process, the terminal may specifically send the first uplink data to the second access network device. At this time, after the second receiving protocol entity of the second access network device successfully receives the first uplink data, the first uplink data is copied, and then, the second access network device may be copied by the second The receiving protocol entity sends the first uplink data to the upper layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first access network device, respectively.

For example, taking the second receiving protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The terminal may specifically send the first uplink data to the second access network device. At this time, after the RLC layer protocol entity of the second access network device successfully receives the first uplink data, the first uplink data is copied, and then, the RLC layer protocol of the second access network device The entity sends the first uplink data to the PDCP layer protocol entity of the second access network device and the first access network device, respectively.

In another specific implementation process, the terminal may specifically send first uplink data to the first access network device and the second access network device, or may also send the first uplink data to the first access network The device sends first uplink data, and sends second uplink data to the second access network device.

For example, the sending protocol entity of the terminal copies the first uplink data, and then, the sending protocol entity of the terminal sends the first uplink data to an upper layer receiving protocol entity of the sending protocol entity of the terminal, by The upper layer receiving protocol entity of the sending protocol entity of the terminal sends the first uplink data to the first access network device and the second access network device, respectively.

It can be understood that the above specific implementation process can be further combined to realize the uplink data transmission.

In this implementation manner, the uplink data, that is, the first uplink data and the second uplink data, may be at least one of data that is not correctly sent by the terminal and data to be sent by the terminal. This embodiment compares There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, if the data sending entity changes from the first access network device to the first access network device and / or the second access Network device, then the terminal may transmit downlink data with the first access network device, or may also transmit downlink data with the second access network device, which is not particularly limited in this embodiment.

In a specific implementation process, the terminal may specifically receive the first downlink data sent by the first access network device and the second access network device, or sent by the second access network device .

The first downlink data may be sent by the first access network device to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, or The second access network device may send to the first access network device through the X2 interface or the second transmission protocol entity of the second access network device, which is not particularly limited in this embodiment.

The first sending protocol entity of the first access network device may include, but is not limited to, a physical (PHY) layer protocol entity, a media access control (Media Access Control, MAC) layer protocol entity, and a wireless link control ( Ratio Link Control (RLC) layer protocol entity and Packet Data Convergence Protocol (PDCP) layer protocol entity, at least one of which is not specifically limited in this embodiment.

For example, the first sending protocol entities are, in order from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity.

The second transmission protocol entity of the second access network device may include, but is not limited to, a physical (PHY) layer protocol entity, a media access control (Media Access Control, MAC) layer protocol entity, and a wireless link control ( Ratio Link Control (RLC) layer protocol entity and Packet Data Convergence Protocol (PDCP) layer protocol entity, at least one of which is not specifically limited in this embodiment.

For example, the second sending protocol entities are, in order from bottom to top, PHY layer protocol entities, MAC layer protocol entities, RLC layer protocol entities, and PDCP layer protocol entities.

In another specific implementation process, the terminal may specifically receive the first downlink data sent by the first access device and the second access network device, and the first downlink data may be The first access network device copies the first downlink data to the first sending protocol entity of the first access network device through the first sending protocol entity of the first access network device The lower layer sending protocol entity and the second access network device, or may be the second access network device copying the first downlink data through the second sending protocol entity of the second access network device The lower layer transmission protocol entity and the first access network device that are sent to the second transmission protocol entity of the second access network device later are not particularly limited in this embodiment.

For example, taking the first sending protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The first access network device may specifically copy the first downlink data to the MAC layer protocol entity and the first access network device of the first access network device through the RLC layer protocol entity of the first access network device. Two access network devices, the first access device and the second access network device sending the first downlink data to the terminal.

Or, for another example, taking the second sending protocol entity as the RLC layer protocol entity as an example, the implementation solution of the implementation process will be described below. The second access network device may specifically copy the first downlink data to the MAC layer protocol entity and the second access network device after copying the first downlink data through the RLC layer protocol entity of the second access network device In the first access network device, the first access device and the second access network device send the first downlink data to the terminal.

In another specific implementation process, the terminal may specifically receive first downlink data sent by the first access network device and receive second downlink data sent by the second access network device.

It can be understood that the above specific implementation process can be further combined to realize the transmission of downlink data.

In this implementation, the downlink data, that is, the first downlink data and the second downlink data, may be at least one of data that the terminal does not receive correctly and data that the terminal is to receive. In this embodiment The comparison is not particularly limited.

In the above two implementation manners, the first uplink data and / or the second uplink data and / or the first downlink data and / or the second downlink data may be specifically transmitted through a designated bearer.

Wherein, the designated bearer may include but not limited to a Master Cell Group (MCG) bearer, a Secondary Cell Group (SCG) bearer, an MCG split bearer and The at least one path in the SCG split bearer is not specifically limited in this embodiment.

Optionally, in a possible implementation manner of this embodiment, the trigger condition of the handover may include but is not limited to a time trigger condition and / or an event trigger condition, which is not particularly limited in this embodiment.

In a specific implementation process, the time trigger condition may include but is not limited to a timer, which is not particularly limited in this embodiment.

For example, after receiving the handover request response (handover request ack), the first access network device may start a timer, and after the timer expires, it may start transmission of uplink data or downlink data.

In another specific implementation process, the event trigger condition may include but is not limited to indication information, which is not particularly limited in this embodiment.

Specifically, the indication information may include but is not limited to signaling indication information and / or user plane indication information, which is not particularly limited in this embodiment.

For example, the sending end of the signaling instruction information may include at least one of a terminal, a first access network device, a second access network device, and a core network device, which is not particularly limited in this embodiment; The receiving end of the instruction information may include at least one of a terminal, a first access network device, a second access network device, and a core network device, which is not particularly limited in this embodiment.

The core network equipment involved may be mobility management equipment, specifically the access and mobility management functions (Access and Mobility Management Function) in the 5G core network, the Next Generation Core (NGCN) (AMF), or it can also be a 4G core network (evolved packet core (Evolved Packet Core, EPC) mobility management entity (MobilityManagementEntity, MME), etc., this embodiment is not particularly limited.

Or, for another example, the signaling instruction information may be radio resource control (Radio Resource Control, RRC) signaling, such as HO command, RRC reconfiguration, or other new signaling, or may be X2 -AP signaling, such as handover request response (handover request), sequence number (SN) status transfer (STATUS transfer), or other new signaling, or S1-AP signaling, in this embodiment This is not particularly limited.

Or, for another example, the user plane indication information may be indication information carried in the header of the data packet, such as an RRC header, a PDCP header, an RLC header, or a MAC header.

Further, in this implementation process, the indication information may further be used to indicate the first uplink data and / or the second uplink data and / or the first downlink data and / or the first The transmission path of the second downlink data, which implementation process in the previous implementation mode is adopted.

In this embodiment, by switching the transmission data of the terminal from the first transmission mode to the second transmission mode during a handover process, one of the transmission modes is to simultaneously connect two access network devices, namely the first access network device and The second access network device transmits uplink data or downlink data between the terminal, the first access network device, and the second access network device, thereby realizing data transmission in the simultaneous connection switching mode.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the sequence of actions described. Because according to the invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the description of each embodiment has its own emphasis. For a part that is not detailed in an embodiment, you can refer to related descriptions in other embodiments.

FIG. 2 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention, as shown in FIG. 2. The data transmission device of this embodiment may include a switching unit 21, which may be used to switch the transmission data of the terminal from the first transmission mode to the second transmission mode during the switching process.

It should be noted that the access network equipment involved in the present invention may be an evolved base station (Evolved) in the Evolved Universal Mobile Communication System Terrestrial Radio Access Network (Evolved Universal Mobile Telecommunication System Territorial Access Network, E-UTRAN) NodeB, eNB), or may also be a 5G base station in the next generation radio access network (Next-Generation-Radio Access Network, NG-RAN), that is, gNB, etc., which is not particularly limited in this embodiment.

The core idea of the present invention is that in the simultaneous connection (Simultaneous Connectivity) switching mode, the terminal can simultaneously maintain the protocol stacks with the source access network device and the target access network device, respectively, by switching the terminal during the switching process. The transmission data is switched from the first transmission mode to the second transmission mode. One of the transmission modes is to simultaneously connect two access network devices, namely the first access network device and the second access network device. Uplink data or downlink data is transmitted between the network access device and the second access network device, thereby achieving data transmission in the simultaneous connection switching mode.

Optionally, in a possible implementation manner of this embodiment, if the data receiving entity changes from the first access network device to the first access network device and / or the second access Network equipment, then the data transmission device can perform uplink data transmission.

In a specific implementation process, if the data transmission device is the terminal, then the switching unit 21 may be further used for

Sending the first uplink data to the first access network device, so that the first access network device can transmit the first uplink data through the X2 interface or the first receiving protocol entity of the first access network device Sending data to the second access network device; and / or

Sending the first uplink data to the second access network device, so that the second access network device can transmit the first uplink data through the X2 interface or the first receiving protocol entity of the second access network device Send data to the first access network device; and / or

Sending the first uplink data to the first access network device for the first receiving protocol entity of the first access network device to successfully copy the first uplink data after receiving the first uplink data, by the The first receiving protocol entity of the first access network device sends the first uplink data to an upper-layer receiving protocol entity of the first receiving protocol entity of the first access network device and the second access network, respectively Equipment; and / or

Sending the first uplink data to the second access network device for the second receiving protocol entity of the second access network device to successfully copy the first uplink data after receiving the first uplink data, by the The second receiving protocol entity of the second access network device sends the first uplink data to an upper layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first access network, respectively Equipment; and / or

Send first uplink data to the first access network device and the second access network device, respectively, or send the first uplink data to the first access network device, to the second access network device Send the second uplink data.

In another specific implementation process, if the data transmission device is the first access network device, then the switching unit 21 may be further used

Receiving the first uplink data sent by the terminal, and sending the first uplink data to the second access network device through the X2 interface or the first sending protocol entity of the first access network device; and / or

After receiving the first uplink data sent by the terminal, the first receiving protocol entity of the first access network device successfully copies the first uplink data after receiving the first uplink data, and the first access network The first receiving protocol entity of the device sends the first uplink data to the upper layer receiving protocol entity of the first receiving protocol entity of the first access network device and the second access network device respectively; and / or

And the second access network device respectively receive the first uplink data sent by the terminal, or receive the first uplink data sent by the terminal, and the second uplink data sent by the terminal is sent by the second access network The device receives.

In another specific implementation process, if the data transmission device is the second access network device, then the switching unit 21 may be further used

Receiving the first uplink data sent by the terminal, and sending the first uplink data to the first access network device through the X2 interface or the second sending protocol entity of the second access network device; and / or

After receiving the first uplink data sent by the terminal, the second receiving protocol entity of the second access network device successfully receives the first uplink data and then copies the first uplink data, and the second access network The second receiving protocol entity of the device sends the first uplink data to the upper layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first access network device, respectively; and / or

And the first access network device respectively receive first uplink data sent by the terminal or receive second uplink data sent by the terminal, and the first uplink data sent by the terminal is sent by the first access network The device receives.

Optionally, in a possible implementation manner of this embodiment, if the data sending entity changes from the first access network device to the first access network device and / or the second access Network equipment, then the data transmission device can perform downlink data transmission.

Receiving first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is the first The access network device sends to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, or through the X2 interface or the first The second sending protocol entity of the second access network device sends to the first access network device; and / or

Receiving the first downlink data sent by the first access device and the second access network device, where the first downlink data is the first access network device through the first access The first sending protocol entity of the network device copies the first downlink data to the lower layer sending protocol entity and the second access network device of the first sending protocol entity of the first access network device, or is The second access network device copies the first downlink data to the second transmission protocol entity of the second access network device through the second transmission protocol entity of the second access network device The lower layer sending protocol entity and the first access network device; and / or

Receiving first downlink data sent by the first access network device, and receiving second downlink data sent by the second access network device.

Sending the first downlink data to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, the first access network device and the second Access network equipment, or the second access network equipment sends the first downlink data to the terminal; and / or

Using the first sending protocol entity of the first access network device to copy and send the first downlink data to the lower layer sending protocol entity and the second of the first sending protocol entity of the first access network device An access network device, the first access device and the second access network device send the first downlink data to the terminal; and / or

Send first downlink data to the terminal, and send the second downlink data to the terminal by the second access network device.

Sending the first downlink data to the first access network device through the X2 interface or the second sending protocol entity of the second access network device, the first access network device and the second An access network device, or the first access network device sends the first downlink data to the terminal; and / or

Using the second sending protocol entity of the second access network device to copy and send the first downlink data to the lower sending protocol entity of the second sending protocol entity of the second access network device and the A first access network device, the first access device and the second access network device send the first downlink data to the terminal; and / or

Sending second downlink data to the terminal, and the first downlink data is sent by the first access network device to the terminal.

In this implementation, the downlink data, that is, the first downlink data and the second downlink data, may be at least one of data that the terminal does not receive correctly and data that the terminal is to receive. In this embodiment The comparison is not performed. In the above two implementations, the first uplink data and / or the second uplink data and / or the first downlink data and / or the second downlink data may be specified by Bearer transmission.

It should be noted that the method in the embodiment corresponding to FIG. 1 may be implemented by the data transmission device provided in this embodiment. For a detailed description, please refer to the relevant content in the embodiment corresponding to FIG. 1, which will not be repeated here.

In this embodiment, during the switching process, the switching unit switches the transmission data of the terminal from the first transmission mode to the second transmission mode. One of the transmission modes is to connect two access network devices simultaneously, namely the first access network. The device and the second access network device perform uplink data or downlink data transmission between the terminal, the first access network device, and the second access network device, thereby realizing data transmission in the simultaneous connection switching mode.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined Or it can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data transmission method, which includes:

During the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode.
The method according to claim 1, wherein the first transmission mode is a transmission mode used for data transmission when the terminal is connected to the first access network device; the second transmission mode is the When the terminal is connected to the first access network device and the second access network device at the same time, the transmission mode used for transmitting data.
The method of claim 1, wherein:

The data transmission entity in the first transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device;

The data transmission entity of the second transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device.
The method of claim 1, wherein:

The data receiving entity of the first transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device;

The data receiving entity of the second transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device.
The method according to any one of claims 2 to 4, further comprising:

If the data receiving entity changes from the first access network device to the first access network device and / or the second access network device,

The terminal sends first uplink data to the first access network device for the first access network device to use the X2 interface or the first receiving protocol entity of the first access network device to transfer the Sending the first uplink data to the second access network device; and / or

The terminal sends first uplink data to the second access network device for the second access network device to use the X2 interface or the first receiving protocol entity of the second access network device to transfer the Sending the first uplink data to the first access network device; and / or

The terminal sends first uplink data to the first access network device for the first receiving protocol entity of the first access network device to successfully copy the first uplink data after receiving the first uplink data , The first uplink data is sent by the first receiving protocol entity of the first access network device to the upper layer receiving protocol entity and the second of the first receiving protocol entity of the first access network device, respectively Access network equipment; and / or

The terminal sends first uplink data to the second access network device for the second reception protocol entity of the second access network device to successfully copy the first uplink data after receiving the first uplink data , The second receiving protocol entity of the second access network device sends the first uplink data to an upper-layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first Access network equipment; and / or

The terminal sends first uplink data to the first access network device and the second access network device respectively, or sends the first uplink data to the first access network device and sends the second uplink data to the second The incoming network device sends the second uplink data.
The method according to any one of claims 2 to 4, further comprising:

If the data sending entity changes from the first access network device to the first access network device and / or the second access network device,

The terminal receives first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is The first access network device sends to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, or the second access network device uses the X2 interface or The second sending protocol entity of the second access network device sends to the first access network device; and / or

The terminal receives the first downlink data sent by the first access device and the second access network device. The first downlink data is that the first access network device passes the first A first sending protocol entity of an access network device, copying the first downlink data and sending it to the lower layer sending protocol entity and the second access network device of the first sending protocol entity of the first access network device Or the second access network device copies the first downlink data to the second of the second access network device after copying the first downlink data through the second sending protocol entity of the second access network device A lower layer sending protocol entity of the sending protocol entity and the first access network device; and / or

The terminal receives first downlink data sent by the first access network device, and receives second downlink data sent by the second access network device.
The method according to claim 5 or 6, wherein the first receiving protocol entity of the first access network device and / or the first sending protocol entity and / or all of the first access network device The second receiving protocol entity of the second access network device or the second sending protocol entity of the second access network device includes a PHY layer protocol entity and / or a MAC layer protocol entity and / or an RLC layer protocol entity and a PDCP layer At least one of the agreement entities.
The method according to claim 5 or 6, wherein the first uplink data and / or the second uplink data and / or the first downlink data and / or the second downlink data pass Specifies bearer transmission.
The method according to claim 8, wherein the designated bearer comprises at least one path among MCG bearer, SCG bearer, MCG split bearer and SCG split bearer.
The method according to any one of claims 1-9, wherein the trigger condition of the handover includes a time trigger condition and / or an event trigger condition.
The method according to claim 10, wherein the time trigger condition comprises a timer.
The method according to claim 10, wherein the event triggering condition includes indication information.
The method according to claim 12, wherein the indication information includes signaling indication information and / or user plane indication information.
The method according to claim 13, wherein the indication information is further used to indicate the first uplink data and / or the second uplink data and / or the first downlink data and / or all The second downlink data transmission path is described.
A data transmission device, characterized in that it includes:

The switching unit is configured to switch the transmission data of the terminal from the first transmission mode to the second transmission mode during the switching process.
The apparatus according to claim 15, wherein the first transmission mode is a transmission mode used by the terminal to transmit data when it is connected to the first access network device; the second transmission mode is the When the terminal is connected to the first access network device and the second access network device at the same time, the transmission mode used for transmitting data.
The device according to claim 15, characterized in that

The data transmission entity in the first transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device;

The data transmission entity of the second transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device.
The device according to claim 15, characterized in that

The data receiving entity of the first transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device;

The data receiving entity of the second transmission mode includes at least one of the following entities: a terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, and a second access network Protocol entities in the device and the second access network device.
The device according to any one of claims 16 to 18, wherein the device is the terminal,

If the data receiving entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Sending the first uplink data to the first access network device, so that the first access network device can transmit the first uplink data through the X2 interface or the first receiving protocol entity of the first access network device Sending data to the second access network device; and / or

Sending the first uplink data to the second access network device, so that the second access network device can transmit the first uplink data through the X2 interface or the first receiving protocol entity of the second access network device Send data to the first access network device; and / or

Sending the first uplink data to the first access network device for the first receiving protocol entity of the first access network device to successfully copy the first uplink data after receiving the first uplink data, by the The first receiving protocol entity of the first access network device sends the first uplink data to an upper-layer receiving protocol entity of the first receiving protocol entity of the first access network device and the second access network, respectively Equipment; and / or

Sending the first uplink data to the second access network device for the second receiving protocol entity of the second access network device to successfully copy the first uplink data after receiving the first uplink data, by the The second receiving protocol entity of the second access network device sends the first uplink data to an upper layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first access network, respectively Equipment; and / or

Send first uplink data to the first access network device and the second access network device, respectively, or send the first uplink data to the first access network device, to the second access network device Send the second uplink data.
The apparatus according to any one of claims 16 to 18, wherein the apparatus is the first access network device,

If the data receiving entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Receiving the first uplink data sent by the terminal, and sending the first uplink data to the second access network device through the X2 interface or the first sending protocol entity of the first access network device; and / or

After receiving the first uplink data sent by the terminal, the first receiving protocol entity of the first access network device successfully copies the first uplink data after receiving the first uplink data, and the first access network The first receiving protocol entity of the device sends the first uplink data to the upper layer receiving protocol entity of the first receiving protocol entity of the first access network device and the second access network device respectively; and / or

And the second access network device respectively receive the first uplink data sent by the terminal, or receive the first uplink data sent by the terminal, and the second uplink data sent by the terminal is sent by the second access network The device receives.
The apparatus according to any one of claims 16 to 18, wherein the apparatus is the second access network device,

If the data receiving entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Receiving the first uplink data sent by the terminal, and sending the first uplink data to the first access network device through the X2 interface or the second sending protocol entity of the second access network device; and / or

After receiving the first uplink data sent by the terminal, the second receiving protocol entity of the second access network device successfully receives the first uplink data and then copies the first uplink data, and the second access network The second receiving protocol entity of the device sends the first uplink data to the upper layer receiving protocol entity of the second receiving protocol entity of the second access network device and the first access network device, respectively; and / or

And the first access network device respectively receive first uplink data sent by the terminal or receive second uplink data sent by the terminal, and the first uplink data sent by the terminal is sent by the first access network The device receives.
The device according to any one of claims 16 to 18, wherein the device is the terminal,

If the data sending entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Receiving first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is the first The access network device sends to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, or through the X2 interface or the first The second sending protocol entity of the second access network device sends to the first access network device; and / or

Receiving the first downlink data sent by the first access device and the second access network device, where the first downlink data is the first access network device through the first access The first sending protocol entity of the network device copies the first downlink data to the lower layer sending protocol entity and the second access network device of the first sending protocol entity of the first access network device, or is The second access network device copies the first downlink data to the second transmission protocol entity of the second access network device through the second transmission protocol entity of the second access network device The lower layer sending protocol entity and the first access network device; and / or

Receiving first downlink data sent by the first access network device, and receiving second downlink data sent by the second access network device.
The apparatus according to any one of claims 16 to 18, wherein the apparatus is the first access network device,

If the data sending entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Sending the first downlink data to the second access network device through the X2 interface or the first sending protocol entity of the first access network device, the first access network device and the second Access network equipment, or the second access network equipment sends the first downlink data to the terminal; and / or

Using the first sending protocol entity of the first access network device to copy and send the first downlink data to the lower layer sending protocol entity and the second of the first sending protocol entity of the first access network device An access network device, the first access device and the second access network device send the first downlink data to the terminal; and / or

Send first downlink data to the terminal, and send the second downlink data to the terminal by the second access network device.
The apparatus according to any one of claims 16 to 18, wherein the apparatus is the second access network device,

If the data sending entity changes from the first access network device to the first access network device and / or the second access network device,

The switching unit is also used for

Sending the first downlink data to the first access network device through the X2 interface or the second sending protocol entity of the second access network device, the first access network device and the second An access network device, or the first access network device sends the first downlink data to the terminal; and / or

Using the second sending protocol entity of the second access network device to copy and send the first downlink data to the lower sending protocol entity of the second sending protocol entity of the second access network device and the A first access network device, the first access device and the second access network device send the first downlink data to the terminal; and / or

Sending second downlink data to the terminal, and the first downlink data is sent by the first access network device to the terminal.
The apparatus according to any one of claims 19 to 24, wherein the first receiving protocol entity of the first access network device and / or the first sending protocol entity of the first access network device And / or the second receiving protocol entity of the second access network device and / or the second sending protocol entity of the second access network device includes a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity and At least one of PDCP layer protocol entities.
The apparatus according to any one of claims 19 to 24, wherein the first uplink data and / or the second uplink data and / or the first downlink data and / or the first The second downlink data is transmitted through the designated bearer.
The apparatus according to claim 26, wherein the designated bearer comprises at least one path of MCG bearer, SCG bearer, MCG split bearer and SCG split bearer.
The device according to any one of claims 15 to 27, wherein the trigger condition of the handover includes a time trigger condition and / or an event trigger condition.
The apparatus according to claim 28, wherein the time trigger condition comprises a timer.
The apparatus according to claim 28, wherein the event triggering condition includes indication information.
The apparatus according to claim 30, wherein the indication information includes signaling indication information and / or user plane indication information.
The apparatus according to claim 31, wherein the indication information is further used to indicate the first uplink data and / or the second uplink data and / or the first downlink data and / or all The second downlink data transmission path is described.