CN117835355A

CN117835355A - Data transmission method and communication device

Info

Publication number: CN117835355A
Application number: CN202211214189.5A
Authority: CN
Inventors: 酉春华; 范强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2024-04-05
Also published as: WO2024067475A1

Abstract

The application provides a data transmission method and a communication device, wherein the method comprises the following steps: the first access network device sends a first subset of data to the second access network device, the first subset of data being a subset of data in the first set of data, wherein the first set of data is one of at least one set of data of a first radio bearer of the terminal device. The first access network device sends a second subset of data to the terminal device, the second subset of data being a subset of data in the first subset of data other than the first subset of data. The transmission efficiency of the data set can be improved, and the continuity and the integrity of the data set transmission are further improved.

Description

Data transmission method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a data transmission method and a communication apparatus.

Background

Augmented reality (XR) refers to a human-machine interactive virtual environment in which reality and virtualization are combined by a computer. XR includes various forms of Virtual Reality (VR), augmented reality (augmented reality, AR), mixed Reality (MR), and the like.

At present, the integration of mobile communication technology and XR is being studied, so that the XR is not limited to local implementation any more, and the cloud XR combined with the mobile communication technology can greatly change the future living, entertainment and working modes of people. Video in XR services consists of consecutive images, an XR application server usually generates video frames periodically at a certain frame rate, and a receiving end can only completely display an image corresponding to a video frame after receiving the complete video frame. How to guarantee the continuity and the integrity of XR service for a mobile communication system is a problem to be solved when the current mobile communication technology and XR are combined.

Disclosure of Invention

The embodiment of the application provides a data transmission method and a communication device, which can improve the transmission efficiency of a data set and further improve the continuity and the integrity of the data set transmission.

In a first aspect, a method is provided that may be performed by an access network device or a module (e.g., a chip) configured with (or for) the access network device. The method performed by the first access network device will be described below as an example.

The method comprises the following steps: the first access network device sends a first subset of data to the second access network device, the first subset of data being a subset of data in the first set of data, wherein the first set of data is one of at least one set of data of a first radio bearer of the terminal device. The first access network device sends a second subset of data to the terminal device, the second subset of data being a subset of data in the first subset of data other than the first subset of data.

According to the scheme, the access network devices send different data subsets in one data set to the terminal device, the terminal device receives the data subsets in one data set from the access network devices, so that the transmission efficiency of the data set can be improved, the continuity and the integrity of video frames can be improved when the terminal device is applied to video service data (such as video frames of XR service) transmission, and the situations of video blocking and incomplete image display are reduced.

With reference to the first aspect, in certain implementations of the first aspect, the sequence numbers of the data packets in the first subset of data are consecutive, the sequence numbers of the data packets in the second subset of data are consecutive, and the sequence numbers of the data packets in the first subset of data are different from the sequence numbers of the data packets in the second subset of data.

According to the scheme, the sequence numbers of the data packets in each data subset in the first data set are continuous, and the sequence numbers of the data packets in different subsets are different, so that the terminal equipment can determine the integrity of the data subsets from different access network equipment according to the sequence numbers, and further judge whether the first data set is completely received.

With reference to the first aspect, in certain implementations of the first aspect, the first data set is one or more video frames.

The scheme can be applied to video service data (such as video frames of XR service) transmission, can improve the continuity and the integrity of the video frames, and reduces the situations of video clamping and incomplete image display.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first access network device sends a first message to the second access network device requesting cooperative transmission of the at least one data set.

According to the scheme, the first access network device can request the second access network device to cooperatively transmit the data set through the first message, so that the first access network device and the second access network device can cooperatively transmit the data set after consensus is achieved.

With reference to the first aspect, in certain implementation manners of the first aspect, the sending, by the first access network device, a first message to the second access network device includes: the first access network device determines that the link quality with the terminal device does not meet the transmission requirements of the at least one data set. The first access network device sends the first message to the second access network device.

According to the scheme, the first access network device can cooperatively transmit the data set by requesting the second access network device under the condition that the link quality between the first access network device and the terminal device does not meet the transmission requirement of the data set, so that the transmission of the data set can meet the transmission requirement.

With reference to the first aspect, in certain implementation manners of the first aspect, the first message includes first indication information and/or second indication information, where the first indication information is used to indicate a transmission requirement of the at least one data set, and the second indication information is used to indicate a first data volume, and the first data volume is a data volume of a data subset that requests transmission by the second access network device.

According to the scheme, the first access network device can inform the second access network device of the transmission requirement of the data set and/or the data quantity of the data subset needing cooperative transmission through the first message, so that the second access network device can judge whether to accept the cooperative transmission request of the first access network device or not by referring to the first message.

With reference to the first aspect, in certain implementations of the first aspect, the first message includes the second indication information, and the method further includes: the first access network device receives a second message from the second access network device, the second message being used for indicating that the cooperative transmission fails, the second message including third indication information, the third indication information being used for indicating a second data amount, the second data amount being a data amount of a subset of data that the second access network device is capable of cooperatively transmitting.

In one embodiment, the first data amount indicated by the second indication information is a maximum data amount of a subset of data that the first access network device requests the second access network device to cooperatively transmit, and the second data amount is smaller than the first data amount, i.e. the second data amount is the maximum data amount of the subset of data that the second access network device is capable of cooperatively transmitting.

In another embodiment, the first data amount indicated by the second indication information is a minimum data amount of a data subset that the first access network device requests the second access network device to cooperatively transmit, and the second data amount is greater than the first data amount, that is, the second data amount is a minimum data amount of a data subset that the second access network device is capable of cooperatively transmitting.

According to the scheme, under the condition that the second access network equipment does not accept the cooperative transmission request, the first access network equipment can be informed of the failure of the cooperative transmission through the second message. And the second access network device may also notify the first access network device of the data amount of the subset of data that can be cooperatively transmitted through third indication information in the second message. So that the first access network device can refer to whether to adjust the data amount of the subset of data requested for transmission.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first access network device sends a third message to the second access network device, where the third message is used to request to cooperatively transmit the at least one data set, the third message includes fourth indication information, where the fourth indication information is used to indicate a third data volume, where the third data volume is a data volume of a subset of data that requests to be cooperatively transmitted by the second access network device, and where the third data volume is a data volume of a subset of data that the second access network device is capable of cooperatively transmitting.

Optionally, if the second data amount is the maximum data amount of the subset of data that the second access network device can cooperatively transmit, the third data amount is smaller than the second data amount; or if the second data amount is the minimum data amount of the subset of data that the second access network device can cooperatively transmit, the third data amount is greater than the second data amount.

According to the above scheme, the first access network device may adjust the data amount of the data subset that requests the cooperative transmission according to the third indication information, so that the adjusted data amount (i.e., the third data amount) is the data amount of the data subset that the second access network device can cooperatively transmit.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first access network device receives a fourth message from the second access network device, the fourth message being for acknowledging the cooperative transmission of the at least one data set.

According to the scheme, under the condition that the second access network equipment accepts the cooperative transmission request of the first access network equipment, the second access network equipment can send a fourth message to inform the first access network equipment, so that the first access network equipment and the second access network equipment agree.

With reference to the first aspect, in certain implementation manners of the first aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device.

In an exemplary process of switching from the first access network device to the second access network device, the terminal device can implement the scheme provided by the application through DAPS switching, so as to improve the transmission efficiency of the data set and improve the continuity and integrity of the data set transmission.

With reference to the first aspect, in some implementations of the first aspect, the first access network device and the second access network device are two access network devices to which the terminal device is connected in a dual connection manner.

The scheme provided by the application can be realized through a plurality of access network devices connected by the terminal device in a double-link mode, so that the transmission efficiency of the data set is improved, and the continuity and the integrity of the data set transmission are improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first access network device receives the at least one data set from the core network device.

In a second aspect, a data transmission method is provided, which may be performed by an access network device or a module (e.g. a chip) configured in (or for) the access network device. The second access network device is described below as an example.

The method comprises the following steps: the second access network device receives a first subset of data from the first access network device, the second subset of data being a subset of data in the first set of data, wherein the first set of data is one of at least one set of data of a first radio bearer of the terminal device. The second access network device sends the first subset of data to the terminal device.

With reference to the second aspect, in certain implementations of the second aspect, sequence numbers of data packets in the first subset of data are consecutive.

With reference to the second aspect, in certain implementations of the second aspect, the first data set is one or more video frames.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the second access network device receives a first message from the first access network device requesting cooperative transmission of the at least one data set.

With reference to the second aspect, in certain implementations of the second aspect, the first message includes first indication information and/or second indication information, where the first indication information is used to indicate a transmission requirement of the at least one data set, and/or the second indication information is used to indicate a first data volume, where the first data volume is a data volume of a subset of data that requests transmission by the second access network device.

With reference to the second aspect, in certain implementations of the second aspect, the first message includes the second indication information, and the method further includes: the second access network device sends a second message to the first access network device, where the second message is used to indicate that the cooperative transmission fails, and the second message includes third indication information, where the third indication information is used to indicate a second data volume, where the second data volume is a data volume of a subset of data that the second access network device can cooperatively transmit.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the second access network device receives a third message from the first access network device, the third message being for requesting cooperative transmission of the at least one data set, the third message comprising fourth indication information for indicating a third amount of data, the third amount of data being an amount of data of a subset of data for which the second access network device is requested to cooperatively transmit, and the third amount of data being an amount of data of a subset of data for which the second access network device is capable of cooperatively transmitting.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the second access network device sends a fourth message to the first access network device, the fourth message being used to acknowledge the cooperative transmission of the at least one data set.

With reference to the second aspect, in some implementations of the second aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device; or the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

In a third aspect, a data transmission method is provided, which may be performed by a terminal device or a module (e.g. a chip) configured in (or for) the terminal device. The following description will take a terminal device as an example.

The method comprises the following steps: the terminal device receives a first subset of data from the second access network device, the first subset of data being a subset of data in the first set of data, wherein the first set of data is one of at least one set of data of a first radio bearer of the terminal device. The terminal device receives a second subset of data from the first access network device, the second subset of data being a subset of data in the first subset of data other than the first subset of data.

With reference to the third aspect, in certain implementations of the third aspect, the sequence numbers of the data packets in the first subset of data are consecutive, the sequence numbers of the data packets in the second subset of data are consecutive, and the sequence numbers of the data packets in the first subset of data are different from the sequence numbers of the data packets in the second subset of data.

With reference to the third aspect, in certain implementations of the third aspect, the first set of data is one or more video frames.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device determines that the first data set was successfully received.

With reference to the third aspect, in some implementations of the third aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device. Or the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

In a fourth aspect, a data transmission method is provided, which may be performed by an access network device or a module (e.g. a chip) configured in (or for) the access network device. The first access network device is described below as an example.

The method comprises the following steps: the first access network device receives a third subset of data from the terminal device, the third subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device. The first access network device receives a fourth subset of data from the second access network device, the fourth subset of data being a subset of data in the second set of data other than the third subset of data.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the sequence numbers of the data packets in the third subset of data are consecutive, the sequence numbers of the data packets in the fourth subset of data are consecutive, and the sequence numbers of the data packets in the third subset of data are different from the sequence numbers of the data packets in the fourth subset of data.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the second data set is one or more video frames.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device sends a fifth message to the terminal device, the fifth message being for indicating that the sub-set streaming of the at least one data set is enabled.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device sends a sixth message to the second access network device requesting cooperative reception of the at least one data set.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first access network device sending a sixth message to the second access network device includes: the first access network device determines that the link quality with the terminal device does not meet the transmission requirements of the at least one data set. The first access network device sends the sixth message to the second access network device.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the sixth message includes fifth indication information and/or sixth indication information, where the fifth indication information is used to indicate a transmission requirement of the at least one data set, and/or the sixth indication information is used to indicate a fourth data volume, where the fourth data volume is a data volume of a subset of data received by the second access network device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sixth message includes the sixth indication information, and the method further includes: the first access network device receives a seventh message from the second access network device, the seventh message for refusing to cooperatively receive the at least one data set, the seventh message including seventh indication information for indicating a fifth data amount, the fifth data amount being a data amount of a subset of data supported by the second access network device.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device sends an eighth message to the second access network device, the eighth message being for requesting cooperative transmission of the at least one data set, the eighth message including eighth indication information for indicating a sixth data amount, the sixth data amount satisfying a data amount of a data subset supported by the second access network device.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device receives a ninth message from the second access network device, the ninth message being for acknowledging the cooperative reception of the at least one data set.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device sends ninth indication information and/or tenth indication information to the terminal device, wherein the ninth indication information is used for indicating first resources carrying the third data subset, and the tenth indication information is used for indicating second resources carrying the fourth data subset.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device. Or the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the first access network device sends the at least one data set to a core network device.

In a fifth aspect, a data transmission method is provided, which may be performed by an access network device or a module (e.g. a chip) configured in (or for) the access network device. The second access network device is described below as an example.

The method comprises the following steps: the second access network device receives a fourth subset of data from the terminal device, the fourth subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device. The second access network device sends a fourth subset of data to the first access network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, sequence numbers of data packets in the fourth subset of data are consecutive.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the second data set is one or more video frames.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the second access network device receives a sixth message from the first access network device, the sixth message requesting cooperative reception of the at least one data set.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the sixth message includes fifth indication information and/or sixth indication information, where the fifth indication information is used to indicate a transmission requirement of the at least one data set, and/or the sixth indication information is used to indicate a fourth data volume, where the fourth data volume is a data volume of the subset of data requested to be received by the second access network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the sixth message includes the sixth indication information, and the method further includes: the second access network device sends a seventh message to the first access network device, the seventh message being for refusing to cooperatively receive the at least one data set, the seventh message including seventh indication information for indicating a fifth data amount, the fifth data amount being a data amount of a subset of data supported by the second access network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the second access network device receives an eighth message from the first access network device requesting cooperative transmission of the at least one data set, the eighth message including eighth indication information indicating a sixth data amount, the sixth data amount satisfying a data amount of a subset of data supported by the second access network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the second access network device sends a ninth message to the first access network device, the ninth message being for acknowledging the cooperative reception of the at least one data set.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device. Or the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

In a sixth aspect, a data transmission method is provided, which may be performed by a terminal device or a module (e.g. a chip) configured in (or for) the terminal device. The following description will take a terminal device as an example.

The method comprises the following steps: the terminal device sends a third subset of data to the first access network device, wherein the third subset of data is a subset of data in a second set of data, the second set of data being one of at least one set of data of a second radio bearer of the terminal device. The terminal device sends a fourth subset of data to the second access network device, the fourth subset of data being a subset of data in the second subset of data other than the third subset of data.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the sequence numbers of the data packets in the third subset of data are consecutive, the sequence numbers of the data packets in the fourth subset of data are consecutive, and the sequence numbers of the data packets in the third subset of data are different from the sequence numbers of the data packets in the fourth subset of data.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the second data set is one or more video frames.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the method further includes: the terminal device receives a fifth message from the first access network device, the fifth message indicating that a subset of the set of data of the second radio bearer is enabled for split transmission.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the method further includes: the terminal device receives ninth indication information and/or tenth indication information from the first access network device, wherein the ninth information is used for indicating first resources carrying the third data subset, and the tenth information is used for indicating second resources carrying the fourth data subset.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first access network device is a source access network device for performing handover by the terminal device, and the second access network device is a target access network device for performing handover by the terminal device. Or the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

In a seventh aspect, a communications apparatus is provided, where the apparatus may include modules, which may be hardware circuitry, software, or a combination of hardware circuitry and software, that perform the methods/operations/steps/actions described in the first aspect or any implementation manner of the first aspect. In one design, the apparatus includes: and a transceiver unit, configured to send a first data subset to the second access network device, where the first data subset is a subset of data in the first data set, and the first data set is one set of at least one data set of a first radio bearer of the terminal device. The transceiver unit is further configured to send a second subset of data to the terminal device, where the second subset of data is a subset of data in the first subset of data other than the first subset of data. Optionally, the apparatus further comprises a processing unit, where the processing unit is configured to control the transceiver unit to send the subset of data in the first data set to the terminal device and the second access network device, respectively.

In an eighth aspect, a communications apparatus is provided, where in a design the apparatus may include modules, which may be hardware circuits, software, or a combination of hardware circuits and software, that perform the methods/operations/steps/actions described in the second aspect or any implementation manner of the second aspect. In one design, the apparatus includes: a transceiver unit configured to receive a first subset of data from a first access network device, where the second subset of data is a subset of data in the first subset of data, and where the first subset of data is one of at least one subset of data of a first radio bearer of a terminal device. The transceiver unit is further configured to send the first data subset to the terminal device. Optionally, the apparatus further comprises a processing unit for determining to send the first subset of data to the terminal device.

In a ninth aspect, a communications apparatus is provided, where the apparatus may include modules, which may be hardware circuitry, software, or a combination of hardware circuitry and software, for performing the method/operations/steps/actions described in any implementation manner in the third aspect. In one design, the apparatus includes: a transceiver unit, configured to receive a first subset of data from a second access network device, where the first subset of data is a subset of data in a first set of data, and the first set of data is one of at least one set of data carried by a first radio of a terminal device. The transceiver unit is further configured to receive a second subset of data from the first access network device, the second subset of data being a subset of data in the first subset of data other than the first subset of data. Optionally, the apparatus further comprises a processing unit for controlling the transceiving unit to receive subsets of data from the first access network device and the second access network device, respectively.

In a tenth aspect, a communications apparatus is provided, where the apparatus may include modules, which may be hardware circuitry, software, or a combination of hardware circuitry and software implementation, that perform the methods/operations/steps/actions described in any of the embodiments of the fourth aspect. In one design, the apparatus includes: the transceiver unit is configured to receive a third subset of data from the terminal device, the third subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device. The transceiver unit is further configured to receive a fourth subset of data from the second access network device, where the fourth subset of data is a subset of data in the second subset of data other than the third subset of data. Optionally, the apparatus further comprises a processing unit for controlling the transceiving unit to receive a subset of data in the second set of data from the terminal device and the second access network device, respectively.

In an eleventh aspect, a communications apparatus is provided, where the apparatus may include modules that perform the method/operation/step/action described in any one of the fifth or fifth embodiments, where the modules may be implemented in hardware circuitry, software, or a combination of hardware circuitry and software. In one design, the apparatus includes: the transceiver unit is configured to receive a fourth subset of data from the terminal device, the fourth subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device. The transceiver unit is further configured to send a fourth subset of data to the first access network device. Optionally, the apparatus further comprises a processing unit for determining to receive the subset of data from the terminal device.

In a twelfth aspect, a communications apparatus is provided, where the apparatus may include modules that perform the methods/operations/steps/actions described in any implementation manner in the third aspect or in any implementation manner, where the modules may be hardware circuits, software, or a combination of hardware circuits and software implementation. In one design, the apparatus includes: the transceiver unit is configured to send a third subset of data to the first access network device, where the third subset of data is a subset of data in a second set of data, and the second set of data is one of at least one set of data of a second radio bearer of the terminal device. The transceiver unit is further configured to send a fourth subset of data to the second access network device, where the fourth subset of data is a subset of data in the second subset of data other than the third subset of data. Optionally, the apparatus further comprises a processing unit, where the processing unit is configured to control the transceiver unit to send a subset of the second data set to the first access network device and the second access network device, respectively.

In a thirteenth aspect, a communications apparatus is provided that includes a processor. The processor may implement the method of the first to sixth aspects and any one of the possible implementation manners of the first to sixth aspects. Optionally, the communications apparatus further comprises a memory, the processor being coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect to the sixth aspect and any one of the possible implementations of the first aspect to the sixth aspect. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface. In the embodiments of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module, or other types of communication interfaces, without limitation.

In one implementation, the communication device is a communication device (e.g., a terminal device or an access network device). When the communication apparatus is a communication device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication apparatus is a chip configured in a communication device. When the communication device is a chip configured in a communication apparatus, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a fourteenth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of the first aspect to the sixth aspect and any one of the possible implementation manners of the first aspect to the sixth aspect.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In a fifteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of the first to sixth aspects and any one of the possible implementations of the first to sixth aspects.

In a sixteenth aspect, there is provided a computer readable storage medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the methods of the first to sixth aspects and any one of the possible implementations of the first to sixth aspects.

In a seventeenth aspect, a communication system is provided, comprising at least one first network device as described above and at least one second access network device as described above. Optionally, the communication system further comprises at least one terminal device as described above.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application;

fig. 2 to 5 are schematic flowcharts of a data transmission method according to an embodiment of the present application;

FIG. 6 is a schematic block diagram of an example of a communication device provided by an embodiment of the present application;

Fig. 7 is a schematic configuration diagram of another example of a communication apparatus provided in an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

In the embodiment of the present application, "/" may indicate that the associated object is an "or" relationship, for example, a/B may indicate a or B; "and/or" may be used to describe that there are three relationships associated with an object, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In order to facilitate description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like may be used for distinction. The terms "first," "second," and the like do not necessarily denote any order of quantity or order of execution, nor do the terms "first," "second," and the like. In this application embodiment, the terms "exemplary" or "such as" and the like are used to denote examples, illustrations, or descriptions, and any embodiment or design described as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. The use of the word "exemplary" or "such as" is intended to present the relevant concepts in a concrete fashion to facilitate understanding. In the embodiments of the present application, at least one (seed) may also be described as one (seed) or a plurality of (seed), and the plurality of (seed) may be two (seed), three (seed), four (seed) or more (seed), which is not limited in this application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: the long term evolution (long term evolution, LTE) system, the LTE frequency division duplex (frequency division duplex, FDD) system, the LTE time division duplex (time division duplex, TDD), the universal mobile telecommunications system (universal mobile telecommunication system, UMTS), the fifth generation (5th generation,5G) telecommunications system, and the communication method provided in the present application can also be applied to a communication system in a future evolved public land mobile network (public land mobile network, PLMN) or other communication systems, and the like. The present application is not limited in this regard.

Fig. 1 is a schematic diagram of a communication system architecture 100 suitable for use in embodiments of the present application. The system architecture 100 includes a User Equipment (UE), an access network, and a core network, where the access network includes one or more access network devices, such as the radio access network (radio access network, RAN) device shown in fig. 1. The network elements in the core network include authentication server function (authentication server function, AUSF) network elements, policy control function (policy control function, PCF) network elements, unified data management (unified data management, UDM), unified database (unified data repository, UDR), network storage function (network repository function, NRF) network elements, application function (application function, AF) network elements, access and mobility management function (access and mobility management function, AMF) network elements, session management function module (session management function, SMF) network elements, RAN, UPF network elements, and the like as shown in fig. 1.

The functions of the core network elements are described below. The AUSF network element is mainly responsible for authenticating a user to determine whether to allow the user or the device to access the network. The PCF network element is mainly responsible for policy management of charging policies and QoS policies. The UDM network element is mainly responsible for managing subscription data, user access authorization, etc. The UDR network element is mainly responsible for access functions of subscription data, policy data, application data and other types of data. The NRF network element may be configured to provide a network element discovery function, and provide network element information corresponding to a network element type based on a request of another network element. NRF network elements also provide network element management services such as network element registration, updating, deregistration, and network element state subscription and push. The AF network element mainly transmits the requirement of the application side to the network side. The AMF network element mainly performs mobility management, access authentication/authorization and other functions. In addition, the AMF network element is responsible for transferring user policies between the UE and PCF network elements. The SMF network element is mainly responsible for completing session management functions such as network protocol (internet protocol, IP) address allocation, UPF network element selection, charging and quality of service (quality of service, qoS) policy control, and the like of the UE. The UPF network element is used as an interface UPF with a Data Network (DN), and is mainly responsible for completing functions of user plane data forwarding, session/flow-level based charging statistics, bandwidth limitation and the like.

As shown in fig. 1, the functional units may communicate through a next generation Network (NG) interface, such as: the UE can transmit control plane information with AMF node through NG interface 1 (N1), the RAN node can establish user plane data transmission channel with UPF through NG interface 3 (N3), the RAN node can establish control plane signaling connection with AMF node through NG interface 2 (N2), UPF can interact with SMF node through NG interface 4 (N4), UPF can interact user plane data with data network DN through NG interface 6 (N6), AMF node can interact with SMF node through NG interface 11 (N11), SMF node can interact with PCF node through NG interface 7 (N7), AMF node can interact with AUSF through NG interface 12 (N12). It should be noted that fig. 1 is only an exemplary architecture diagram, and the network architecture may include other functional units besides the functional units shown in fig. 1.

The system architecture may also include a server (cloud) that may provide computing or application services for devices requiring integrity transmission services, including various devices such as control servers and application servers.

The access network device in the embodiment of the present application may be a device with a wireless transceiver function, and may also be referred to as an access network node or a network device. The apparatus includes, but is not limited to: devices with some or all base station functions, such as evolved NodeB (eNodeB/eNB), next generation base station (gNB) in the fifth generation (5th generation,5G) mobile communication system, next generation base station in the sixth generation (6th generation,6G) mobile communication system, base station in the future mobile communication system, transmission reception point (transmission reception point, TRP), access Point (AP) in the wireless fidelity (wireless fidelity, WIFI) system, wireless relay node, wireless backhaul node, and the like.

In some deployments, the access network device may include a Centralized Unit (CU) and/or a Distributed Unit (DU). The CUs and DUs may each implement part of the functionality of the base station, e.g. the CUs is responsible for handling non-real time protocols and services, implementing the functions of radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (media access control, MAC) and Physical (PHY) layers. The access network device may also include an active antenna unit (active antenna unit, AAU) that may implement part of the physical layer processing functions, radio frequency processing, and active antenna related functions.

It should be understood that embodiments of the present application are not limited to a specific form of access network device.

The terminal device in the embodiments of the present application may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may also be an XR terminal device, such as a VR terminal device, an AR terminal device, an MR terminal device, or the like. The terminal device in the embodiment of the present application may also be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a vehicle-mounted device, a wearable device, or a terminal device that evolves in the future, etc.

It should be understood that embodiments of the present application are not limited to specific forms of terminal devices.

Related art and terms designed for embodiments of the present application are described below.

1. Dual active protocol stack (dual active protocol stack, DAPS) handoff

The DAPS switching means that the terminal equipment still keeps the connection with the source access network equipment after receiving the switching command, and meanwhile, the terminal equipment tries to establish connection with the target access network equipment. It can be considered that in the DAPS handoff scenario, the terminal device establishes a connection with the source access network device and the target access network device, respectively.

The source access network device may activate a DAPS handoff for one or more data radio bearers (data radio bearer, DRBs) of the terminal device for which the terminal device continues to transmit data packets concurrently with the source access network device and the target access network device until the terminal device receives a resource release request indicated by the target radio access network (radio access network, RAN) node.

2. Double link (dual connectivity DC)

In the DC scenario, the terminal device establishes communication connection with multiple access network devices at the same time, and can utilize radio resources of the multiple access network devices to perform communication. The plurality of access network devices comprise a main access network device and an auxiliary access network device, and the main access network device is in control connection with core network devices in the core network. The primary access network device may provide air interface resources for the terminal device through a plurality of cells managed by the primary access network device, where the plurality of cells managed by the primary access network device may be referred to as a primary cell group (master cell group, MCG), and the secondary access network device may provide air interface resources for the terminal device through a plurality of cells managed by the secondary access network device, where the plurality of cells managed by the secondary access network device may be referred to as a secondary cell group (secondary cell group, SCG).

3. Radio bearer (radio bearer, RB)

The radio bearer is a generic term for the network device to allocate different layer protocol entities and configurations for the terminal device, and includes a PDCP protocol entity, an RLC protocol entity, a series of resources allocated by a MAC protocol entity and a PHY, and so on. The radio bearer is a path (including PHY layer, MAC layer, RLC layer, and PDCP layer) connecting the network device and the terminal device through the Uu interface, and any data transmitted over the Uu interface is passed through the radio bearer. The radio bearers include Signaling Radio Bearers (SRBs), which are channels for actually transmitting signaling messages of the system, and data radio bearers (data RBs, DRBs), which are channels for actually transmitting user data.

The video in XR services is made up of consecutive pictures, with a video frame containing the data of one picture. The XR application server typically generates video frames periodically at a frame rate, for example, 60 frames per second (fps), meaning that the XR application server generates 60 video frames per second, about one video frame per 16.67 ms. In a mobile communication system, a network side can divide a video frame into a plurality of data packets for transmission, and for a terminal device receiving the video frame, only after all the data packets of the video frame are correctly received, an image corresponding to the video frame can be completely displayed. How to ensure the continuity and the integrity of XR service in a mobile communication system is a problem to be solved when the current mobile communication technology and XR are combined.

The embodiment of the application proposes that a plurality of access network devices send different data subsets in one data set to the terminal device, the terminal device receives the data subsets in one data set from the plurality of access network devices, so that the transmission efficiency of the data set can be improved, and the application of the method can improve the continuity and the integrity of video frames in the transmission of video service data (such as video frames of XR service) and reduce the situations of video clamping and incomplete image display.

Fig. 2 is a schematic flowchart of a data transmission method 200 provided in an embodiment of the present application. The method 200 includes, but is not limited to, the steps of:

s201, the first access network device sends a first data subset to the second access network device, where the first data subset is a subset of data in the first data set, and the first data set is one set of at least one data set of a first radio bearer of the terminal device.

Accordingly, the second access network device receives the first subset of data from the first access network device.

The core network device may send at least one data set of the first radio bearer to the first access network device. Accordingly, the first access network device receives the at least one data set from the core network device. The at least one data set includes a first data set. The core network device may be a UPF network element with user plane functionality, for example.

The first access network device sends the first data subset to the second access network device, so that the second access network device forwards the first data subset to the terminal device, and the second access network device and the first access network device cooperate to complete transmission of the first data subset of the terminal device. The transmission efficiency of the data set can be improved.

The first access network device may divide a first set of data received from the core network device into a plurality of subsets of data, each subset of data comprising at least one data. The plurality of data subsets comprise the first data subset and a second data subset, and the second data subset is a subset of data sent by the first access network device to the terminal device.

In one embodiment, sequence Numbers (SNs) of data packets in each of a plurality of data subsets into which the first data set is divided are consecutive, with SNs of data packets in different data subsets being different. Wherein the SN of the data packets in a first subset of the first data set is consecutive, the SN of the data packets in a second subset of the data sets is consecutive, and the sequence number of the data packets in the first subset of the data sets is different from the sequence number of the data packets in the second subset of the data sets.

For example, the first data set includes N data packets having SN of 0 to N. The first access network device divides the first data set into two data subsets, namely a first data subset and a second data subset, wherein the first data subset comprises N ₁ A second subset of data including N ₂ Individual packets, i.e. N ₁ +N ₂ =n, the N in the first subset of data ₁ The SN of each data packet is 0 to N ₁ -1, N in the second subset of data ₂ SN of individual data packet N ₁ To N.

Illustratively, the data packet may be a protocol data unit (protocol data unit, PDU), then the data set may be referred to as a PDU set.

One data set may be one or more video frames. For example, the first data set may be one video frame, or the first data set may be a plurality of video frames, and the plurality of access network devices cooperatively send a data subset of the video frames to the terminal device, so that the terminal device can timely receive each complete video frame, and the transmission efficiency of the video frames can be improved, thereby improving the continuity and integrity of the video frames.

In one embodiment, a first access network device sends a first message to a second access network device, the first message requesting cooperative transmission of at least one data set. Accordingly, the second access network device receives the first message from the first access network device.

The first access network device may request, by the first access network device, the second access network device to cooperatively transmit the at least one data set of the first radio bearer of the terminal device via the first message before sending the first data subset to the second access network device.

The first access network device determines, for example, that the link quality with the terminal device does not meet the transmission requirements of the at least one data set, thereby sending the first message to the second access network device.

The transmission requirements may include, but are not limited to, latency requirements and/or reliability requirements of the at least one data set.

For example, the first access network device measures the communication quality (i.e. link quality) of the radio link between the first access network device and the terminal device, or the terminal device reports the communication quality of the radio link between the first access network device and the terminal device to the first access network device. The first access network device determines, according to the communication quality of the wireless link, that the link quality of the wireless link does not meet the transmission requirement of the at least one data set of the first wireless bearer, and the first access network device may request the other access network devices to cooperatively transmit the at least one data set, so that the transmission of the at least one data set meets the transmission requirement. If the first access network device sends the first message to the second access network device, the second access network device is requested to cooperatively transmit the at least one data set through the first message.

As an example and not by way of limitation, the communication quality of the wireless link may be one or more of a reference signal received power (reference signal receiving power, RSRP), a signal to interference plus noise ratio (signal to interference plus noise ratio, SINR), or a reference signal received quality (reference signal receiving quality, RSRQ).

Optionally, the first message includes first indication information and/or second indication information, where the first indication information is used to indicate a transmission requirement of the at least one data set of the first radio bearer. The second indication information is used for indicating a first data volume, wherein the first data volume is the data volume of a data subset which is cooperatively transmitted by the first access network device and request the second access network device.

For example, the first message may include first indication information by which the first access network device informs the second access network device of the transmission requirements of the at least one data set of the first radio bearer. After the second access network device receives the first message from the first access network device, it can be determined whether the second access network device can meet the transmission requirement indicated by the first indication information, so as to determine whether to accept the cooperative transmission requested by the first access network device. If the second access network equipment can accept the request of the first access network equipment under the condition of meeting the transmission requirement; the request of the first access network device is denied if the transmission requirement is not fulfilled.

For another example, the first message may include second indication information, and the first access network device notifies the second access network device through the second indication information, where the first access network device requests the second access network device to cooperatively transmit the data amount of the subset of data, that is, the first data amount. After the second access network device receives the first message, whether the transmission requirement of the data subset of the first data volume can be met or not can be judged according to the second indication information, so that whether the cooperative transmission requested by the first access network device is accepted or not is judged. For example, the second access network device receives a collaboration request of the first access network device under the condition that the second access network device can meet the transmission requirement of the data subset of the first data volume; and under the condition that the transmission requirement of the data subset of the first data volume cannot be met, not accepting the cooperation request of the first access network equipment.

The first data amount may be, for example, the data amount of the largest subset of data in the at least one data set in the first radio bearer of the terminal device, or the first data amount may be the data amount of the smallest subset of data in the at least one data set in the first radio bearer of the terminal device. The first data amount may be a data amount of a subset of data that is estimated by the first access network device according to the service type and needs to be cooperatively transmitted by the second access network device, or may be a first data amount determined after the first access network device receives the at least one data set from the core network device.

In one embodiment, the first data amount indicated by the second indication information may be the number of data packets or may be the number of bytes.

If the second access network device accepts the cooperative transmission requested by the first access network device, the second access network device may send a fourth message to the first access network device, where the fourth message is used to confirm the at least one data set of the first radio bearer of the cooperative transmission terminal device. After the first access network device receives the fourth message, S201 may be performed.

If the second access network device does not accept the cooperative transmission requested by the first access network device, the second access network device may send a second message to the first access network device, where the second message is used to indicate that the cooperative transmission fails.

In an embodiment, the first message includes the second indication information for indicating the first data amount, and the second message sent by the second access network device to the first access network device may include third indication information, where the third indication information is used to indicate the second data amount, and the second data amount is a data amount of a data subset that can be cooperatively transmitted by the second access network device.

And the second access network equipment determines that the cooperative transmission requirement of the data subset of the first data quantity cannot be met according to the first data quantity indicated by the second indication information, and sends a second message to the first access network equipment, wherein the second message is specifically used for indicating that the cooperative transmission of the data subset of the first data quantity requested by the first access network equipment fails. And the second access network device may notify the first access network device of the data amount of the subset of data that the second access network device can cooperatively transmit, that is, the second data amount, through the third indication information in the second message.

If the first data volume indicated by the second indication information is the maximum data volume of the data subset which the first access network device requests the second access network device to cooperatively transmit, the second data volume is smaller than the first data volume, namely the second data volume is the maximum data volume of the data subset which the second access network device can cooperatively transmit.

If the first data volume indicated by the second indication information is the minimum data volume of the data subset which the first access network device requests the second access network device to cooperatively transmit, the second data volume is larger than the first data volume, namely the second data volume is the minimum data volume of the data subset which the second access network device can cooperatively transmit.

The second access network device may determine, according to the resource allocation capability of the second access network device, a maximum data amount and a minimum data amount of the subset of data that the second access network device is capable of cooperatively transmitting. But the application is not limited thereto.

In one embodiment, the first access network device sends a third message to the second access network device, the third message being for requesting the cooperative transmission of at least one data set, and the third message comprising fourth indication information for indicating a third amount of data, the third amount of data being an amount of data of a subset of data that the first access network device requests the second access network device to cooperatively transmit, and the third amount of data being an amount of data of a subset of data that the second access network device is capable of cooperatively transmitting. That is, if the second data amount is the maximum data amount of the subset of data that the second access network device can cooperatively transmit, the third data amount is smaller than the second data amount; or if the second data amount is the minimum data amount of the subset of data that the second access network device can cooperatively transmit, the third data amount is greater than the second data amount.

After the first access network device receives the second message containing the third indication information from the second access network device, the second access network device can determine the second data volume of the data subset which can be cooperatively transmitted by the second access network device according to the third indication information. The first access network device may adjust the amount of data of the subset of data that the second access network device is requested to cooperatively transmit such that the adjusted amount of data is the amount of data of the subset of data that the second access network device is able to cooperatively transmit. The first access network device may send a third message to the second access network device to request cooperative transmission to the second access network device again, and notify, through fourth indication information in the third message, the second access network device of a third data amount of the data subset that is requested to be cooperatively transmitted by the second access network device. The second access network device receives the third message, determines the data amount of the data subset capable of cooperatively transmitting the third message request, and sends a fourth message to the first access network device to inform the first access network device that the second access network device accepts the cooperative transmission request of the data subset of the third data amount.

If the second data amount of the data subset that can be cooperatively transmitted by the second access network device does not meet the transmission requirement of the first radio bearer, the first access network device may not send the third message to the second access network device. Alternatively, the first access network device may not send the third message to the second access network device for other reasons. The first access network device may request the other access network device to cooperatively transmit the at least one data set of the first radio bearer of the terminal device.

S202, the second access network equipment sends a first data subset to the terminal equipment.

Accordingly, the terminal device receives the first subset of data from the second access network device.

S203, the first access network device sends a second data subset to the terminal device, where the second data subset is a subset of data in the first data set except the first data subset.

It should be noted that, the order of execution of the steps in the embodiment shown in fig. 2 is not limited in this application, and the order of execution of the steps may be determined by a logical relationship between the steps. For example, the second access network device may send the second subset of data to the terminal device after receiving the first set of data from the first access network device, which may send the second set of data to the terminal device before, after, or simultaneously with sending the first set of data to the second access network device. The present application is not limited in this regard.

The terminal device receives the first subset of data from the second access network device and receives the second subset of data from the first access network device. The terminal equipment judges whether the data in the first data set is complete in integrity transmission. If the terminal device can judge whether the integrity transmission is completed or not by judging the data subset in the first data set from each access network device, thereby determining whether the integrity transmission of the first data set is completed or not.

For example, the last data packet in the data set sent by the access network device to the terminal device includes an indication information, where the indication information is used to indicate that the data packet is the last data packet in the data set sent by the access network device.

If the first access network equipment sends the second data subset to the terminal equipment, N is included ₂ Data packets, the N sent by the first access network device ₂ And data packets. The first data subset sent by the second access network device to the terminal device comprises N ₁ Data packet, N ₁ The data packet is the last N in the first data set ₁ Data packet, then N ₁ The last packet of the data packets, the N-th packet ₁ The data packet comprises an indication information, and the indication information is used for indicating that the data packet is the last data packet in the first data set. The terminal device may send the nth packet according to the second access network device ₁ The indication information in the data packets determines that the data packet is the last data packet in the first subset of data, and determines whether the first subset of data is received completely based on whether sequence numbers of the data packets from the second access network device are consecutive. If the terminal device receives each data packet in the first data set completely by receiving the second data subset from the first access network device and the first data subset from the second access network device, the terminal device may determine that the integrity transmission of the first data set is completed.

The data set may include one or more video frames, and the terminal device may display the data frames in the first data set after determining that the first data set is transmitted integrity.

According to the scheme, the access network devices send different data subsets in the data set to the terminal device, and the terminal device receives the data subsets in the data set from the access network devices, so that the transmission efficiency of the data set can be improved, the continuity and the integrity of video service data (such as video frames of XR service) transmission are improved, and the situations of video clamping and incomplete image display are reduced.

In one implementation, the first access network device and the second access network device in the embodiment shown in fig. 2 are two access network devices that are connected by a terminal device in a Dual Connection (DC) manner.

In another implementation manner, the first access network device in the embodiment shown in fig. 2 is a source access network device for performing handover by a terminal device, and the second access network device is a target access network device for performing handover by the terminal device.

Fig. 3 is a schematic flow chart of this embodiment, as shown in fig. 3, which may include, but is not limited to, the following steps:

S301, the core network device sends at least one data set of a first radio bearer of the terminal device to the first access network device.

Accordingly, the first access network device receives the at least one data set from the core network device. The core network device may be a UPF network element with user plane functionality, for example.

S302, the first access network device sends a data set 1 to the terminal device.

The data set 1 is one of at least one data set received by the first access network device from the core network device.

S303, the first access network device sends a switching command request message to the second access network device.

Accordingly, the second access network device receives the handover command request message from the first access network device.

And under the condition that the first access network equipment determines that the terminal equipment meets the switching condition of switching to the second access network equipment, the first access network equipment sends a switching command request message to the second access network equipment so as to request the second access network equipment to switch the terminal equipment to the second access network equipment. The handover command request message may include indication information of a first radio bearer of the terminal device to use DAPS handover.

For example, the first access network device sending the handover command request message to the second access network device may include indication information for indicating that the DAPS handover for the first radio bearer is activated, since the channel quality between the terminal device and the first access network device decreases such that the handover condition is met, and the first access network device determines that the communication quality of the radio link between the first access network device and the terminal device cannot meet the transmission requirement of the at least one data set of the first radio bearer. So that the first access network device and the second access network device cooperatively transmit at least one data set of the first radio bearer by utilizing the DAPS handoff mechanism.

S304, the second access network equipment sends a switching command to the first access network equipment.

Accordingly, the first access network device receives the handover command from the second access network device. And under the condition that the second access network equipment receives a switching request of the first access network equipment for switching the terminal equipment to the second access network equipment, the second access network equipment sends a switching command to the first access network equipment and informs the first access network equipment to switch the terminal equipment to the second access network equipment. And the first access network equipment determines that the second access network equipment accepts switching the terminal equipment to the second access network equipment according to the switching command, and accepts DAPS switching of the first wireless bearer of the terminal equipment.

After receiving the switching command, the first access network device may notify the terminal device to switch to the second access network device, where the first radio bearer is DAPS switching.

S305, the first access network device sends a subset a of data to the terminal device, where the subset a of data is a subset of the data in the data set 2.

Wherein the data set 2 is one of at least one data set of the first radio bearer of the terminal device. It should be noted that, the order of execution of the steps in the embodiment shown in fig. 3 is not limited in this application, and may be determined by a logical relationship between the steps. The first access network device may receive the at least one data set from the core network device over a period of time, for example. The data set 2 may be received before S303 and/or S304, or the data set 2 may be received after S303 and/or S304. The present application is not limited in this regard.

The first access network device determines that the data set 2 is transmitted in cooperation with the second access network device, and then the first access network device divides the data set into a plurality of data subsets, and SN of data packets contained in each data subset in the plurality of data subsets is continuous. The plurality of data subsets comprise a data subset A and a data subset B, wherein the data subset A is sent to the terminal equipment by the first access network equipment, and the data subset B is cooperatively sent to the terminal equipment by the second access network equipment.

S306, the first access network device sends a subset B of data to the second access network device, where the subset B of data is a subset of data in the data set 2 except the data set a.

Accordingly, the second access network device receives the subset B of data from the first access network device.

S307, the terminal equipment and the second access network equipment execute a random access process.

After the first access network equipment informs the terminal equipment to switch to the second access network equipment, the terminal equipment initiates a random access process to the second access network equipment, and performs the random access process with the second access network equipment so as to establish communication connection with the second access network equipment.

It should be appreciated that the first access network device may send the subset of data B to the second access network device before or after the terminal device performs the random access procedure with the second access network device, or may receive the subset of data B from the first access network device through a communication interface with the first access network device during the random access procedure performed by the terminal device with the second access network device. The present application is not limited in this regard.

And S308, the second access network equipment sends the data subset B to the terminal equipment.

After the second access network device establishes communication connection with the terminal device through a random access process, the second access network device sends a data subset B to the terminal device.

According to the scheme, in the process of executing the switching, the terminal equipment can utilize the DAPS mechanism, the source access network equipment and the target access network equipment cooperate to complete the transmission of the data set, different access network equipment respectively send different data subsets in the data set to the terminal equipment, and the terminal equipment receives the data subsets in one data set from a plurality of access network equipment, so that the transmission efficiency of the data set can be improved, the continuity and the integrity of video service data transmission are improved, and the situations of video jamming and incomplete image display are reduced.

For example, each of the at least one data set of the first radio bearer includes at least one video frame, such as a video frame of an XR service. The first access network device indicates the terminal device to switch to the second access network device under the condition that the link communication quality between the first access network device and the terminal device is reduced, the first access network device is transmitting video frames of XR service of the terminal device, the first access network device can activate DAPS switching of the first wireless bearer with the second access network device when the link communication quality between the first access network device and the terminal device can not meet the transmission requirement of the XR service, and the first access network device and the second access network device cooperatively transmit the video frames of the XR service. The video frame transmission efficiency can be improved, so that the continuity and the integrity of video service data transmission are improved, and the situations of video jamming and incomplete image display are reduced.

The above describes that when the network side transmits the downlink data set to the terminal device, the transmission of the data set can be completed through cooperation of a plurality of access network devices. Aiming at an uplink data set sent by a terminal device to a network side, the embodiment of the application provides that the terminal device can respectively send different data subsets of the same data set to a plurality of access network devices. To improve the transmission efficiency of the data set.

Fig. 4 is a schematic flow chart of a data transmission method 400 provided in an embodiment of the present application. The data transmission method 400 includes, but is not limited to, the steps of:

s401, the terminal device sends a third subset of data to the first access network device, the third subset of data being a subset of data in the second set of data, wherein the third set of data is one of at least one set of data of the second radio bearer of the terminal device.

Accordingly, the first access network device receives the third subset of data from the terminal device.

S402, the terminal equipment sends a fourth data subset to the second access network equipment, wherein the fourth data subset is a subset of data except the third data subset in the second data set.

Accordingly, the second access network device receives the fourth subset of data from the terminal device.

In one embodiment, the terminal device divides the second data set into a plurality of data subsets and sends the data subsets to the plurality of access network devices respectively. The SNs of the data packets in each of the plurality of data subsets are consecutive and the SNs of the data packets in different data subsets are different. Wherein the plurality of subsets of data includes a third subset of data sent to the first access network device and a fourth subset of data sent to the second access network device, the SNs of the data packets in the third subset of data are consecutive, the SNs of the data packets in the fourth subset of data are consecutive, and the third subset of data is different from the SNs of the data packets in the fourth subset of data.

For example, the second data set includes M data packets having SN of 0 to M. The first access network device divides the second data set into two data subsets, namely a third data subset and a fourth data subset, wherein the third data subset comprises M ₁ A fourth subset of data including M ₂ Individual data packets, i.e. M ₁ +M ₂ =m, the M in the third subset of data ₁ The SN of each data packet is 0 to M ₁ -1, M in the fourth subset of data ₂ The SN of each data packet is M ₁ To M.

Illustratively, as described above, the data packet may be a PDU, and the data set may be referred to as a PDU set, and the data subset may be referred to as a PDU subset.

In an embodiment, the first access network device sends ninth indication information and/or tenth indication information to the terminal device, where the ninth indication information is used to indicate a first resource carrying the third data subset, and the tenth indication information is used to indicate a second resource carrying the fourth data subset.

Illustratively, the ninth indication information and the tenth indication information may be referred to as resource allocation information.

For example, the first access network device may send ninth indication information to the terminal device, where the ninth indication information is used to indicate the first resource carrying the third data subset, and after the terminal device receives the ninth indication information, send, according to the ninth indication information, a data packet in the third data subset to the first access network device on the first resource. Accordingly, the first access network device receives data packets in the third subset of data from the terminal device on the first resource.

For another example, the first access network device may send tenth indication information to the terminal device, where the tenth indication information is used to indicate the second resource carrying the fourth data subset, and after the terminal device receives the tenth indication information, send, according to the tenth indication information, the data packet in the fourth data subset to the second access network device on the second resource. Accordingly, the second access network device receives data packets from the fourth subset of data from the terminal device on the second resource. Alternatively, the second access network device may notify the first access network device to carry the second resource of the fourth subset of data, so that the first access network device notifies the terminal device through the tenth indication information. However, the present application is not limited thereto, and the first access network device may not send tenth indication information to the terminal device, and the second access network device sends the indication information to the terminal device to notify the terminal device to send the fourth data subset on the second resource.

The first access network device may send both the ninth indication information and the tenth indication information to the terminal device, which may be carried in different information, such as may be contained in different downlink control information (downlink control information, DCI), respectively. Or the ninth indication information and the tenth indication information may be carried in the same information, such as may be contained in the same DCI. The present application is limited thereto.

In one embodiment, prior to S401, the first access network device sends a fifth message to the terminal device, the fifth message being for enabling a subset streaming of the data set of the second radio bearer. Accordingly, the terminal device receives the fifth message from the first access network device.

For example, the data set is a PDU set, the first access network device sends a fifth message to the terminal device, where the fifth message is used to enable the PDU set of the second radio bearer to be distributed (PDU set splitting), and after the terminal device receives the fifth message, the terminal device sends the PDU set of the second radio bearer to the network device in a mode of subset distribution. If the terminal device establishes a communication connection with the first access network device and the second access network device, the terminal device divides one PDU set of the second radio bearer (i.e. one example of the second data set) into two PDU subsets, namely PDU subset 1 and PDU subset 2, and the terminal device sends PDU subset 1 (i.e. one example of the third data subset) to the first access network device and PDU subset 2 (i.e. one example of the fourth data subset) to the second access network device in order to forward the PDU subset 2 to the first access network device through the second access network device.

The first access network device may send the fifth message to the terminal device if it is determined that the link quality with the terminal device does not meet the transmission requirement of the at least one data set of the second radio bearer.

For example, when the first access network device determines that the link quality between the first access network device and the terminal device does not meet the transmission requirement of the at least one data set, the terminal device may be notified by a fifth message to enable the sub-set split transmission of the data set of the second radio bearer, and the terminal device sends different data sub-sets of the same data set to the first access network device and the second access network device, and transmits different data sub-sets of the same data set by wireless links between the terminal device and the plurality of access network devices, so as to meet the transmission requirement of the at least one data of the second radio bearer.

The first access network device interacts with the second access network device before enabling, via the fifth message, the sub-aggregate split transmission of the at least one data set of the second radio bearer, requesting the second access network device to cooperatively receive the first data set from the terminal device.

The first access network device sends a sixth message to the second access network device requesting cooperative reception of the at least one data set. Accordingly, the second access network device receives a sixth message from the first access network device.

The first access network device may request, via the sixth message, the second access network device to cooperatively receive the at least one data set of the second radio bearer from the terminal device.

For example, the first access network device measures the communication quality of the radio link between the first access network device and the terminal device, or the terminal device reports the communication quality of the radio link between the first access network device and the terminal device to the first access network device. The first access network device determines, according to the communication quality of the radio link, that the link quality of the radio link does not meet the transmission requirement of the at least one data set of the second radio bearer of the terminal device, and the first access network device may request the other access network devices to cooperatively receive the at least one data set. If the first access network device sends the sixth message to the second access network device, the second access network device is requested to cooperatively receive the at least one data set through the sixth message.

Optionally, the first message includes fifth indication information and/or sixth indication information, wherein the fifth indication information is used to indicate a transmission requirement of the at least one data set of the second radio bearer. The sixth indication information is used for indicating a fourth data amount, and the fourth data amount is the data amount of the data subset which the first access network device requests the second access network device to cooperatively receive.

For example, the sixth message may include fifth indication information by which the first access network device informs the second access network device of the transmission requirements of the at least one data set of the second radio bearer. After receiving the sixth message from the first access network device, the second access network device determines whether the second access network device can meet the transmission requirement indicated by the sixth indication information, thereby determining whether to accept the cooperation request of the first access network device. If the transmission requirement can be met, the second access network equipment can accept the request of the first access network equipment; if the transmission requirement cannot be met, the second access network device may reject the request of the first access network device.

For another example, the sixth message may include sixth indication information, through which the first access network device informs the second access network device that the first access network device requests the second access network device to cooperatively receive the data amount of the subset of data, that is, the fourth data amount. After the second access network device receives the sixth message, whether the cooperative receiving requirement of the data subset of the fourth data volume can be met or not can be judged according to the sixth indication information, so that whether the cooperative request of the first access network device is accepted or not is judged. If the second access network device can meet the cooperative receiving requirement of the data subset for receiving the fourth data volume, the second access network device can accept the cooperative request of the first access network device; if the second access network device is unable to cooperatively receive the fourth subset of data amounts, the second access network device may not accept the cooperation request of the first access network device.

The fourth data amount may be, for example, the data amount of the largest subset of data in the at least one data set in the second radio bearer of the terminal device, or the fourth data amount may be the data amount of the smallest subset of data in the at least one data set in the second radio bearer of the terminal device. The fourth data amount may be a data amount of a subset of data that the first access network device needs to cooperatively receive by the second access network device, which is estimated by the first access network device according to the service type.

In one embodiment, the fourth data amount indicated by the sixth indication information may be the number of data or may be the number of bytes.

If the second access network device accepts the cooperative transmission requested by the first access network device, the second access network device may send a ninth message to the first access network device, where the ninth message is used to confirm that the at least one data set of the second radio bearer from the terminal device is cooperatively received. After the first access network device receives the fourth message, the first access network device may send the fifth message to the terminal device, so as to notify the terminal device to enable the sub-set of at least one data set of the second radio bearer to perform split-stream transmission.

If the second access network device does not accept the cooperation request requested by the first access network device, the second access network device may send a seventh message to the first access network device, where the seventh message is used to indicate that the cooperation reception fails.

In an embodiment, the sixth message includes the sixth indication information for indicating the fourth data amount, and the seventh message sent by the second access network device to the first access network device includes seventh indication information, where the seventh indication information is used to indicate a fifth data amount, and the fifth data amount is a data amount of a subset of data that can be cooperatively received by the second access network device.

And the second access network equipment determines that the receiving of the data subset of the fourth data quantity is not supported according to the fourth data quantity indicated by the sixth indication information, and then the second access network equipment sends a seventh message to the first access network equipment, wherein the seventh message is specifically used for indicating that the cooperative receiving of the data subset of the fourth data quantity requested by the first access network equipment fails. And the second access network device may notify the first access network device of the data amount of the subset of data that the second access network device can cooperatively transmit, i.e. the fifth data amount, through the seventh indication information in the seventh message.

If the fourth data amount indicated by the sixth indication information is the maximum data amount of the data subset which the first access network device requests the second access network device to cooperatively receive, the fifth data amount is smaller than the fourth data amount, that is, the fifth data amount is the maximum data amount of the data subset which the second access network device supports to receive.

If the fourth data amount indicated by the sixth indication information is the minimum data amount of the data subset which the first access network device requests the second access network device to cooperatively receive, the fifth data amount is larger than the fourth data amount, that is, the fifth data amount is the minimum data amount of the data subset which the second access network device supports to receive.

The second access network device may determine a maximum data amount and a minimum data amount of the subset of data supported by the second access network device according to a resource allocation capability of the second access network device. But the application is not limited thereto.

In one embodiment, the first access network device sends an eighth message to the second access network device requesting cooperative reception of the at least one data set of the second radio bearer, and the eighth message includes eighth indication information for indicating a sixth data amount, the sixth data amount being a data amount of a subset of data that the second access network device is capable of cooperatively receiving. If the fifth data amount is the maximum data amount of the subset of data that the second access network device can cooperatively receive, the sixth data amount is smaller than the fifth data amount. Alternatively, if the fifth data amount is the smallest data amount of the subset of data that the second access network device is able to cooperatively receive, the sixth data amount is greater than the fifth data amount.

After the first access network device receives the seventh message containing the seventh indication information from the second access network device, the fifth data volume of the data subset that the second access network device can cooperatively receive can be determined according to the seventh indication information. The first access network device may adjust the amount of data requesting the second access network device to cooperatively receive the subset of data such that the adjusted amount of data is the amount of data of the subset of data that the second access network device is capable of supporting. The first access network device may send an eighth message to the second access network device to request cooperative reception again, and notify the second access network device of the sixth data amount of the data subset that the second access network device is requested to cooperatively receive this time through eighth indication information in the eighth message. The second access network device receives the eighth message, determines a data amount of the subset of data supporting the cooperative transmission requested by the eighth message, and may send a ninth message to the first access network device to inform the first access network device that the second access network device accepts the cooperative reception of the subset of data of the sixth data amount.

If the fifth data amount of the data subset supported by the second access network device does not meet the transmission requirement of the second radio bearer, the first access network device may not send the eighth message to the second access network device. Alternatively, the first access network device may not send the eighth message to the second access network device for other reasons. The first access network device may request the other access network device to cooperatively receive the at least one data set of the first radio bearer of the terminal device.

S403, the second access network device sends the fourth subset of data to the first access network device.

And after receiving the fourth data subset from the terminal equipment, the second access network equipment sends the fourth data subset to the first access network equipment. The first access network device receives the fourth subset of data from the second access network device.

The first access network device may determine whether the data in the second data set completes integrity reception. If the first access network device can determine whether the third subset of data from the terminal device completes the integrity reception, and determine whether the fourth subset of data from the second access network device completes the integrity reception, thereby determining whether to complete the integrity reception of the second set of data.

For example, the last data in the data set sent by the terminal device to each access network device includes an indication information, where the indication information is used to indicate that the data packet is the last data packet in the data set where the data packet is located. If the third data subset sent by the terminal equipment to the first access network equipment comprises M ₁ The fourth data subset sent by the terminal device to the second access network device comprises M ₂ The data packets, such as the second data set, include only the third data subset and the fourth data subset, and M in the fourth data subset ₂ The data packet is the last M in the second data set ₂ And data packets. Then M is ₂ The last packet of the individual packets, i.e. the Mth ₂ The data packet includes an indication information, which indicates that the data packet is the last data packet in the second data set. The first access network equipment receives the Mth forwarded from the second access network equipment ₂ After the data packets, determining the indication information in the data packets, determining that the data packets are the last data packets in the second data set, and judging whether the second data set is completely received according to whether the data packets in the third data subset from the terminal equipment are continuous with the SNs of the data packets in the fourth data subset forwarded by the second access network equipment. If the first access network device receives the data packets from the second data set intact, the first access network device may determine that the integrity transmission of the second data set is complete.

After the first access network device receives the data packet in the second data set completely, the first access network device may send the second data set to the core network device.

According to the scheme, the terminal equipment respectively sends different data subsets comprising one data set to the access network equipment, and the different data subsets of the same data set are transmitted through a plurality of communication links between the terminal equipment and the access network equipment, so that the transmission efficiency of the data set can be improved, the continuity and the integrity of video service data (such as video frames of XR service) transmission are improved, and the situations of video blocking and incomplete image display are reduced.

In one implementation, the first access network device and the second access network device in the embodiment shown in fig. 4 are two access network devices that are connected by a terminal device in a Dual Connection (DC) manner.

In another implementation manner, the first access network device in the embodiment shown in fig. 4 is a source access network device for performing handover by a terminal device, and the second access network device is a target access network device for performing handover by the terminal device.

Fig. 5 is a schematic flow chart of this embodiment, as shown in fig. 5, which may include, but is not limited to, the steps of:

s501, the first access network device sends a switching command request message to the second access network device.

And under the condition that the first access network equipment determines that the terminal equipment meets the switching condition of switching to the second access network equipment, the first access network equipment sends the switching command request message to the second access network equipment so as to request the second access network equipment to switch the terminal equipment to the second access network equipment. The handover command message may include the sixth message described above to request the second access network device to cooperatively receive the second set of data from the second radio bearer of the terminal device while requesting the terminal device to be handed over to the second access network device. Optionally, the sixth message further includes the fifth indication information and/or the sixth indication information.

After receiving the switching command request message from the first access network device, the second access network device determines whether to accept switching the terminal device to the second access network device and accept the cooperative reception of the data subset from the terminal device. If accepted, the second access network device performs S502.

In an embodiment, the handover command request message includes sixth indication information, and if the second access network device determines that the fourth data size cannot meet the cooperative receiving requirement according to the sixth indication information, the second access network device may send the seventh message to the first access network device, where the seventh message includes the seventh indication information. After the first access network device receives the seventh message and sends the eighth message to the second access network device, the second access network device may execute S502.

S502, the second access network equipment sends a switching command to the first access network equipment.

Accordingly, the first access network device receives a handover command from the second access network device. The first access network device determines that the second access network device accepts switching of the terminal device to the second access network device and accepts collaborative reception of the subset of data from the terminal device.

S503, the first access network device sends a handover message to the terminal device, where the handover message includes a handover command.

Accordingly, the terminal device receives the handover message from the first access network device. The handover message further includes the fifth message, and the first access network device notifies the terminal device to switch to the second access network device through a handover command in the handover message, and notifies the terminal device to enable the sub-set of the data set of the second radio bearer to perform streaming transmission through the fifth message in the handover message.

S504, the terminal equipment and the second access network equipment execute a random access process.

After receiving the switching message from the first access network device, the terminal device executes a random access process with the second access network device.

S505, the terminal device sends a subset of data C to the first access network device, where the subset of data C is a subset of data in the data set 3.

Accordingly, the first access network device receives the subset of data C from the terminal device.

The terminal device performs sub-set split transmission of the data set of the second radio bearer according to the fifth message in the handover message, and divides the data set 3 of the second radio bearer into a plurality of data subsets including a data subset C and a data subset D. The SN numbers of the data packets in each of the data subsets 3 are consecutive and the SN numbers of the data packets in the different data subsets are different. The terminal device sends a subset of data C to the first access network device and a subset of data D to the second access network device in S506.

S506, the terminal equipment sends a data subset D to the second access network equipment, wherein the data subset D is a subset of data except the data subset C in the data set 3.

Accordingly, the second access network device receives the subset D of data from the terminal device.

S507, the second access network device sends the data subset C to the first access network device.

Accordingly, the first access network device receives the subset of data C from the second access network device. The second access network device forwards the data subset C to the first access network device after receiving the data subset C from the terminal device.

S508, the first access network device sends the data set 3 to the core network device.

Accordingly, the core network device receives the data set 3 from the second access network device.

The first access network device determines that each data packet in the data set 3 is completely received by receiving the data subset C from the second access network device and the data subset D from the terminal device according to whether the SN numbers in the last data packet in the data set 3 are continuous or not, and the first access network device can determine that the complete reception of the data set 3 is completed. The first access network device sends the data combination 3 to the core network device.

According to the above scheme, the terminal device can execute data subset aggregate shunt transmission of the data set of the second radio bearer in the process of executing handover. The source access network equipment and the target access network equipment cooperate to finish the cooperative reception of the data set, and different access network equipment respectively receives different data subsets in the data set from the terminal equipment, so that the transmission efficiency of the data set can be improved, the continuity and the integrity of video service data transmission are improved, and the situations of video jamming and incomplete image display are reduced.

Fig. 6 and fig. 7 are schematic structural diagrams of possible communication devices according to embodiments of the present application. These communication devices may be used to implement the functions of the terminal or the network device in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented. In the embodiment of the present application, the communication device may be a UE as shown in fig. 1, or a RAN node as shown in fig. 1, or a module (such as a chip) applied to a terminal or a network device.

As shown in fig. 6, the communication apparatus 600 includes a processing unit 610 and a transceiving unit 620.

The communication apparatus 600 may be used to implement the functionality of the terminal device or the access network device in the method embodiments shown in fig. 2 and 3 described above.

When the communication apparatus 600 is used to implement the functionality of the first access network device in the method embodiment shown in fig. 2 or fig. 3: and the receiving and transmitting unit is used for transmitting a first data subset to the second access network equipment, wherein the first data subset is a subset of data in the first data set, and the first data set is one set of at least one data set of a first wireless bearer of the terminal equipment. The transceiver unit is further configured to send a second subset of data to the terminal device, where the second subset of data is a subset of data in the first subset of data other than the first subset of data. Optionally, the apparatus further comprises a processing unit, where the processing unit is configured to control the transceiver unit to send the subset of data in the first data set to the terminal device and the second access network device, respectively.

When the communication apparatus 600 is used to implement the functionality of the second access network device in the method embodiment shown in fig. 2 or fig. 3: a transceiver unit, configured to receive a first subset of data from a first access network device, where the second subset of data is a subset of data in the first subset of data, and the first subset of data is one of at least one data set of a first radio bearer of a terminal device. The transceiver unit is further configured to send the first data subset to the terminal device. Optionally, the apparatus further comprises a processing unit for determining to send the first subset of data to the terminal device.

When the communication apparatus 600 is used to implement the functions of the terminal device in the method embodiment shown in fig. 2 or fig. 3: a transceiver unit, configured to receive a first subset of data from a first access network device, where the first subset of data is a subset of data in a first data set, and the first data set is one set of at least one data set of a first radio bearer of a terminal device. The transceiver unit is further configured to receive a second subset of data from a second access network device, where the second subset of data is a subset of data in the first subset of data other than the first subset of data. Optionally, the apparatus further comprises a processing unit for controlling the transceiving unit to receive subsets of data from the first access network device and the second access network device, respectively.

The communication apparatus 600 may be used to implement the functionality of the terminal device or the access network device in the method embodiments shown in fig. 4 and 5 described above.

When the communication apparatus 600 is used to implement the functions of the first access network device in the method embodiments shown in fig. 4 and 5: the transceiver unit 620 is configured to receive a third subset of data from the terminal device, where the third subset of data is a subset of data in a second set of data, and the second set of data is one of at least one data set of a second radio bearer of the terminal device. The transceiver unit 620 is further configured to receive a fourth subset of data from the second access network device, where the fourth subset of data is a subset of data in the second subset of data other than the third subset of data. Optionally, the apparatus further comprises a processing unit 610 for controlling the transceiving unit 620 to receive a subset of data in the second set of data from the terminal device and the second access network device, respectively. The processing unit 610 is used for

When the communication apparatus 600 is used to implement the functions of the second access network device in the method embodiments shown in fig. 4 and 5: the transceiver unit 620 is configured to receive a fourth subset of data from the terminal device, where the fourth subset of data is a subset of data in a second set of data, and the second set of data is one of at least one data set of a second radio bearer of the terminal device. The transceiver unit 620 is further configured to send a fourth subset of data to the first access network device, where the fourth subset of data is a subset of data in the second subset of data other than the third subset of data. Optionally, the apparatus further comprises a processing unit 610, the processing unit 610 being configured to determine to receive the subset of data from the terminal device.

When the communication apparatus 600 is used to implement the functions of the terminal device in the method embodiments shown in fig. 4 and 5: the transceiver unit 620 is configured to send a third subset of data to the first access network device, where the third subset of data is a subset of data in a second set of data, and the second set of data is one of at least one data set of the second radio bearer of the terminal device. The transceiver unit 620 is further configured to send a fourth subset of data to the second access network device, where the fourth subset of data is a subset of data in the second subset of data except for the third subset of data. Optionally, the apparatus further comprises a processing unit 610, where the processing unit 610 is configured to control the transceiver unit 620 to send the subset of data in the second data set to the first access network device and the second access network device, respectively.

For more details on the processing unit 610 and the transceiver unit 620, reference is made to the relevant description in the method embodiment shown in fig. 4.

As shown in fig. 7, the communication device 700 includes a processor 710 and an interface circuit 720. Processor 710 and interface circuit 720 are coupled to each other. It is understood that the interface circuit 720 may be a transceiver or an input-output interface. Optionally, the communication device 700 may further comprise a memory 730 for storing instructions to be executed by the processor 710 or for storing input data required by the processor 710 to execute instructions or for storing data generated after the processor 710 executes instructions.

When the communication device 700 is used to implement the method shown in fig. 4, the processor 710 is configured to implement the functions of the processing unit 610, and the interface circuit 720 is configured to implement the functions of the transceiver unit 620.

When the communication device is a chip applied to the terminal equipment, the terminal equipment chip realizes the functions of the terminal equipment in the embodiment of the method. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent to the terminal device by the access network device; alternatively, the terminal device chip sends information to other modules (e.g., radio frequency modules or antennas) in the terminal device, which is sent by the terminal device to the access network device.

When the communication device is a module applied to the access network equipment, the access network equipment module realizes the function of the access network equipment in the embodiment of the method. The access network equipment module receives information from other modules (such as a radio frequency module or an antenna) in the access network equipment, and the information is sent to the access network equipment by the terminal equipment; alternatively, the access network device module sends information to other modules (such as radio frequency modules or antennas) in the access network device, where the information is sent by the access network device to the terminal device. The access network device module may be a baseband chip of the access network device, or may be a DU or other module, where the DU may be a DU under an open radio access network (open radio access network, O-RAN) architecture.

It is to be appreciated that the processor in embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The method steps in the embodiments of the present application may be implemented in hardware, or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in an access network device or a terminal device. The processor and the storage medium may reside as discrete components in an access network device or terminal device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; but also optical media such as digital video discs; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method, comprising:

the method comprises the steps that first access network equipment sends a first data subset to second access network equipment, wherein the first data subset is a subset of data in the first data set, and the first data set is one set of at least one data set of a first wireless bearer of terminal equipment;

the first access network device sends a second data subset to the terminal device, wherein the second data subset is a subset of data except the first data subset in the first data set.

2. The method of claim 1, wherein sequence numbers of data packets in the first subset of data are consecutive, sequence numbers of data packets in the second subset of data are consecutive, and wherein sequence numbers of data packets in the first subset of data are different from sequence numbers of data packets in the second subset of data.

3. The method of claim 1 or 2, wherein the first set of data is one or more video frames.

4. A method according to any one of claims 1 to 3, further comprising:

the first access network device sends a first message to the second access network device, the first message being for requesting a cooperative transmission of the at least one data set.

5. The method of claim 4, wherein the first access network device sending the first message to the second access network device comprises:

the first access network device determines that the link quality between the first access network device and the terminal device does not meet the transmission requirement of the at least one data set;

the first access network device sends the first message to the second access network device.

6. The method according to claim 4 or 5, wherein the first message comprises first indication information and/or second indication information,

the first indication information is used for indicating the transmission requirement of the at least one data set, and the second indication information is used for indicating a first data volume, wherein the first data volume is the data volume of the data subset which is requested to be transmitted by the second access network device.

7. The method of claim 6, wherein the first message includes the second indication information, and wherein the method further comprises:

the first access network device receives a second message from the second access network device, where the second message is used to indicate that the cooperative transmission fails, and the second message includes third indication information, where the third indication information is used to indicate a second data volume, where the second data volume is a data volume of a subset of data that the second access network device can cooperatively transmit.

8. The method of claim 7, wherein the method further comprises:

the first access network device sends a third message to the second access network device, where the third message is used to request cooperative transmission of the at least one data set, the third message includes fourth indication information, where the fourth indication information is used to indicate a third data volume, the third data volume is a data volume of a data subset that the first access network device requests the second access network device to transmit, and the third data volume is a data volume of a data subset that the second access network device can cooperatively transmit.

9. The method according to any one of claims 4 to 8, further comprising:

the first access network device receives a fourth message from the second access network device, the fourth message being used to acknowledge the cooperative transmission of the at least one data set.

10. The method according to any one of claims 1 to 7, wherein,

the first access network device is a source access network device for the terminal device to perform handover, and the second access network device is a target access network device for the terminal device to perform handover; or,

the first access network device and the second access network device are two access network devices connected by the terminal device in a double-connection mode.

11. The method according to any one of claims 1 to 10, further comprising:

the first access network device receives the at least one data set from a core network device.

12. A data transmission method, comprising:

the second access network device receives a first data subset from the first access network device, the first data subset being a subset of data in the first data set, wherein the first data set is one of at least one data set of a first radio bearer of the terminal device;

The second access network device sends the first data subset to the terminal device.

13. The method of claim 12, wherein sequence numbers of data packets in the first subset of data are consecutive.

14. The method of claim 12 or 13, wherein the first set of data is one or more video frames.

15. The method according to any one of claims 12 to 14, further comprising:

the second access network device receives a first message from the first access network device requesting a cooperative transmission of the at least one data set.

16. The method according to claim 15, wherein the first message comprises first indication information and/or second indication information,

wherein the first indication information is used for indicating the transmission requirement of the at least one data set, and/or,

the second indication information is used for indicating a first data volume, wherein the first data volume is a data volume of a data subset which is requested to be transmitted by the second access network device.

17. The method of claim 16, wherein the first message includes the second indication information, and wherein the method further comprises:

The second access network device sends a second message to the first access network device, where the second message is used to indicate that the cooperative transmission fails, and the second message includes third indication information, where the third indication information is used to indicate a second data volume, where the second data volume is a data volume of a subset of data that the second access network device can cooperatively transmit.

18. The method of claim 17, wherein the method further comprises:

the second access network device receives a third message from the first access network device, where the third message is used to request cooperative transmission of the at least one data set, the third message includes fourth indication information, where the fourth indication information is used to indicate a third data volume, where the third data volume is a data volume of a data subset that the first access network device requests the second access network device to transmit, and where the third data volume is a data volume of a data subset that the second access network device can cooperatively transmit.

19. The method according to any one of claims 15 to 18, further comprising:

the second access network device sends a fourth message to the first access network device, the fourth message being used to acknowledge the cooperative transmission of the at least one data set.

20. The method according to any one of claims 12 to 17, wherein,

21. A data transmission method, comprising:

the method comprises the steps that a terminal device receives a first data subset from a second access network device, wherein the first data subset is a subset of data in the first data set, and the first data set is one set of at least one data set of a first wireless bearer of the terminal device;

the terminal device receives a second subset of data from the first access network device, the second subset of data being a subset of data in the first subset of data other than the first subset of data.

22. The method of claim 21, wherein the sequence numbers of the data packets in the first subset of data are consecutive, the sequence numbers of the data packets in the second subset of data are consecutive, and the sequence numbers of the data packets in the first subset of data are different from the sequence numbers of the data packets in the second subset of data.

23. The method of claim 21 or 22, wherein the first set of data is one or more video frames.

24. The method according to any one of claims 21 to 23, further comprising:

the terminal device determines that the first data set was successfully received.

25. The method according to any one of claims 21 to 23, wherein,

26. A data transmission method, comprising:

the first access network device receives a third subset of data from the terminal device, the third subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device;

the first access network device receives a fourth subset of data from the second access network device, the fourth subset of data being a subset of data in the second subset of data other than the third subset of data.

27. A data transmission method, comprising:

the second access network device receives a fourth subset of data from the terminal device, the fourth subset of data being a subset of data in a second set of data, wherein the second set of data is one of at least one set of data of a second radio bearer of the terminal device;

the second access network device sends the fourth subset of data to the first access network device.

28. A data transmission method, comprising:

the terminal equipment sends a third data subset to the first access network equipment, wherein the third data subset is a subset of data in a second data set, and the second data set is one set of at least one data set of a second radio bearer of the terminal equipment;

the terminal equipment sends a fourth data subset to the second access network equipment, wherein the fourth data subset is a subset of data except the third data subset in the second data set.

29. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices and transmitting signals to the processor or for sending signals from the processor to other communication devices, the processor being configured to implement the method of any one of claims 1 to 28 by logic circuitry or execution of code instructions.

30. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by a communication device, implement the method of any of claims 1 to 28.