Data transmission method and device

Abstract

The invention provides a data transmission method and device, and the method comprises the steps: a terminal transmits a first message, the first message comprises first capability information, and the first capability information is used for indicating the multipath transmission capability of the PDU Set granularity of the terminal; obtaining a second message, the second message being sent by the SMF according to the first message, the second message comprising ATSSS rule information, the ATSSS rule information comprising PDU Set indication information and a first transmission parameter, the PDU Set indication information being used for indicating whether to perform data multipath transmission with PDU Set as granularity, and the first transmission parameter being used for indicating a transmission parameter corresponding to the data multipath transmission of the PDU Set granularity; and under the condition that the PDU Set indication information indicates that the data multi-path transmission is carried out by taking the PDU Set as the granularity, carrying out the data multi-path transmission of the PDU Set granularity according to the first transmission parameter.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a data transmission method and device. Background Art

[0002] It is an industry consensus that Extended Reality (XR) services will become an important application scenario for future 6G. In view of the service characteristics of XR media, the transmission efficiency of XR media services can be optimized by introducing Protocol Data Unit (PDU) Set.

[0003] Multipath transmission technology is an effective method to improve data transmission speed and network throughput by using multiple transmission paths under multi-access conditions. However, the existing PDU-granularity traffic steering, switching, and splitting (ATSSS) multipath transmission technology may distribute the PDUs in the same PDU Set to different transmission paths in XR business scenarios, which is likely to introduce the problem of out-of-order transmission of multiple PDUs in the PDU Set. Summary of the invention

[0004] The purpose of the present application is to provide a data transmission method and device to solve the problem that the multi-path transmission technology with PDU granularity may cause the transmission disorder of multiple PDUs in a PDU Set.

[0005] In order to achieve the above object, the present application provides a data transmission method, comprising:

[0006] The terminal sends a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MAPDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity;

[0007] The terminal obtains a second message, where the second message is sent by a session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission with PDU Set granularity;

[0008] When the PDU Set indication information indicates that data multipath transmission is performed with PDU Set as the granularity, the terminal performs data multipath transmission with PDU Set as the granularity according to the first transmission parameter.

[0009] Optionally, the terminal sends a first message, including:

[0010] Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type;

[0011] The first message is sent according to the connection capability information.

[0012] Optionally, the obtaining the connection capability information sent by the policy control function PCF includes:

[0013] The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

[0014] Optionally, the first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

[0015] Optionally, the terminal performs data multipath transmission at a PDU Set granularity according to the first transmission parameter, including:

[0016] The terminal transmits multiple PDUs of the same PDU Set on the same transmission path according to the first transmission parameter, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0017] The present application also provides a data transmission method, including:

[0018] The session management function SMF sends a second message to the terminal according to the first message, and sends a third message to the target user plane function UPF;

[0019] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0020] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0021] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0022] Optionally, before sending the second message to the terminal and sending the third message to the UPF, the method further includes:

[0023] Acquire policy and charging control PCC rule information sent by the PCF, the PCC rule information includes MA PDU session control information, the MAPDU session control information includes the PDU Set indication information and a third transmission parameter, the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity;

[0024] The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

[0025] Optionally, before sending the third message to the target UPF, the method further includes:

[0026] According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

[0027] The present application also provides a data transmission method, including:

[0028] The target user plane function UPF obtains the N4 rule information sent by the session management function SMF, where the N4 rule information includes multipath PDU Set control information and a second transmission parameter, where the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity;

[0029] The target UPF performs multipath transmission of data at the PDU Set granularity according to the N4 rule information.

[0030] Optionally, the target UPF performs data multipath transmission at a PDU Set granularity according to N4 rule information, including:

[0031] According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0032] Optionally, the method of the embodiment of the present application further includes:

[0033] A registration request message is sent to the network storage function NRF, wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

[0034] The embodiment of the present application also provides a data transmission device, including a memory, a transceiver, and a processor;

[0035] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0036] Sending a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity;

[0037] Obtain a second message, where the second message is sent by the session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0038] When the PDU Set indication information indicates that data multipath transmission is performed with PDU Set as the granularity, data multipath transmission is performed with PDU Set as the granularity according to the first transmission parameter.

[0039] Optionally, the processor further implements the following steps:

[0040] Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type;

[0041] The first message is sent according to the connection capability information.

[0042] Optionally, the processor further implements the following steps:

[0043] The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

[0044] Optionally, the first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

[0045] Optionally, the processor further implements the following steps:

[0046] According to the first transmission parameter, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0047] The embodiment of the present application also provides a data transmission device, including a memory, a transceiver, and a processor;

[0048] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0049] According to the first message, send a second message to the terminal, and send a third message to the target user plane function UPF;

[0050] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0051] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0052] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0053] Optionally, the processor further implements the following steps:

[0054] Obtaining policy and charging control PCC rule information sent by the PCF, where the PCC rule information includes MA PDU session control information, where the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, where the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity;

[0055] The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

[0056] Optionally, the processor further implements the following steps:

[0057] According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

[0058] The embodiment of the present application also provides a data transmission device, including a memory, a transceiver, and a processor;

[0059] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0060] Obtain N4 rule information sent by the session management function SMF, the N4 rule information including multipath PDU Set control information and a second transmission parameter, the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity;

[0061] According to the N4 rule information, multi-path data transmission is performed at the PDU Set granularity.

[0062] Optionally, the processor further implements the following steps:

[0063] According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0064] Optionally, the processor further implements the following steps:

[0065] A registration request message is sent to the network storage function NRF, wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

[0066] The present application also provides a data transmission device, including:

[0067] A first sending unit, configured to send a first message, wherein the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, wherein the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity;

[0068] a first acquiring unit, configured to acquire a second message, where the second message is sent by a session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as a granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission with PDU Set granularity;

[0069] The first transmission unit is used to perform data multipath transmission with a PDU Set granularity according to the first transmission parameter when the PDU Set indication information indicates that data multipath transmission is performed with a PDU Set as a granularity.

[0070] The present application also provides a data transmission device, including:

[0071] A second sending unit, configured to send a second message to the terminal according to the first message, and send a third message to a target user plane function UPF;

[0072] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0073] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0074] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0075] The present application also provides a data transmission device, including:

[0076] A second acquisition unit is used to acquire N4 rule information sent by the session management function SMF, where the N4 rule information includes multipath PDU Set control information and a second transmission parameter, where the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at the PDU Set granularity;

[0077] The second transmission unit is used to perform multi-path transmission of data at a PDU Set granularity according to the N4 rule information.

[0078] An embodiment of the present application further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the steps of the data transmission method as described above.

[0079] The above technical solution of the present application has at least the following beneficial effects:

[0080] In an embodiment of the present application, a terminal sends a first message, the first message is used to request to establish or update a PDU session of the MA PDU type, and the first message includes first capability information, the first capability information is used to indicate that the terminal supports the multi-path transmission capability of the PDU Set granularity; the terminal obtains a second message, the second message is sent by the SMF according to the first message, the second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multi-path transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate the transmission parameter corresponding to the data multi-path transmission with PDU Set granularity; when the PDU Set indication information indicates that data multi-path transmission is performed with PDU Set as the granularity, the terminal performs data multi-path transmission with PDU Set granularity according to the first transmission parameter. Through the above scheme, the terminal can perform data multi-path transmission with PDU Set granularity based on the transmission parameters corresponding to the data multi-path transmission with PDU Set granularity, so that the PDUs in the same PDU Set will not be distributed to different transmission paths, thereby effectively ensuring the transmission order of multiple PDUs in the PDU Set and improving the transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 A structural diagram showing a network system to which the embodiments of the present application can be applied;

[0082] Figure 2 A schematic diagram showing a flow chart of a data transmission method according to an embodiment of the present application;

[0083] Figure 3 An interactive schematic diagram showing a data transmission method according to an embodiment of the present application;

[0084] Figure 4 A second flowchart of the data transmission method according to an embodiment of the present application is shown;

[0085] Figure 5 A third flowchart of the data transmission method according to an embodiment of the present application is shown;

[0086] Figure 6 One of the schematic diagrams showing multipath data transmission in an embodiment of the present application;

[0087] Figure 7 A second schematic diagram showing multipath data transmission in an embodiment of the present application;

[0088] Figure 8 One of the structural block diagrams showing the data transmission device according to an embodiment of the present application;

[0089] Fig. 9A second structural block diagram showing the data transmission device according to an embodiment of the present application;

[0090] Fig.10 One of the module schematic diagrams showing the data transmission device according to an embodiment of the present application;

[0091] Fig.11 A second schematic diagram showing a module of a data transmission device according to an embodiment of the present application;

[0092] Fig.12 A third schematic diagram of a module showing the data transmission device according to an embodiment of the present application. DETAILED DESCRIPTION

[0093] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0094] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, are implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0095] In the embodiments of the present application, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0096] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0097] Figure 1 A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal device 11 and a network side device (or network device) 12. Among them, the terminal device 11 may also be referred to as a terminal or a user terminal (User Equipment, UE). It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0098] In order to enable those skilled in the art to better understand the embodiments of the present application, the following description is first made.

[0099] The Access Traffic Steering, Switching, Splitting (ATSSS) function can exchange PDUs between UE and data network by using a 3rd Generation Partnership Project (3GPP) access network and a non-3GPP access network at the same time, as well as two independent N3 / N9 tunnels between the PDU Session Anchor (PSA) and the Radio Access Network (RAN) / Access Network (AN), to achieve multi-path transmission of service data, dynamically divert user data flows, and adjust the transmission path to achieve optimal performance.

[0100] The ATSSS connection service is implemented by establishing a Multi-Access PDU (MA PDU) session. The UE can request a MAPDU session when it is registered via both 3GPP and non-3GPP accesses, or when the UE is registered via only one access. The ATSSS function can be supported on any type of access network, including untrusted and trusted non-3GPP access networks, as long as a MA PDU session can be established on this type of access network.

[0101] A UE with ATSSS capability may decide to request an MA PDU session based on the UE Route Selection Policy (URSP) rules provided by the core network.

[0102] The Policy Control and Charging (PCC) rules provided by the Policy Control Function (PCF) include the MA PDU session control information. The Session Management Function (SMF) uses them to derive the ASSSS rules for the UE and the N4 rules for the User Plane Function (UPF). When dynamic PCC is not used for an MA PDU session, the SMF can provide ASSSS rules and N4 rules based on local configuration.

[0103] The UE receives ATSSS rules from the SMF, which indicate how uplink traffic should be routed between 3GPP access and non-3GPP access. Similarly, the UPF receives N4 rules from the SMF, which indicate how downlink traffic should be routed between 3GPP access and non-3GPP access.

[0104] The related solutions support multi-path transmission in the Transmission Control Protocol (TCP) and Quick UDP Internet Connections (QUICK) protocol dimensions, and support the protocol-independent ATSSS Low-Layer (ATSSS-LL) data exchange function. The related solutions do not support routing of uplink services between 3GPP access and non-3GPP access, or routing of downlink services at the PDU Set granularity.

[0105] like Figure 2 As shown, an embodiment of the present application provides a data transmission method, including:

[0106] Step 201: The terminal sends a first message, where the first message is used to request to establish or update a PDU session of a multi-access protocol data unit MA PDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports multipath transmission capability at the granularity of a protocol data unit set PDU Set.

[0107] In an embodiment of the present application, the above-mentioned first message may be a PDU session creation message or a PDU session update message.

[0108] It should be noted that, in the embodiment of the present application, the terminal may expand the above-mentioned first capability based on the existing functions, for example, expand the above-mentioned first capability based on the ATSSS-LL function, or independently expand the above-mentioned first capability.

[0109] The first capability information may be added to existing parameters in the first message, for example, by adding the first capability information in , or by directly adding the first capability information in the first message.

[0110] Step 202: The terminal obtains a second message, where the second message is sent by the session management function SMF according to the first message, and the second message includes access traffic guidance, switching and segmentation ATSSS rule information, and the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether data multipath transmission is performed with PDU Set as the granularity, and the first transmission parameter is used to indicate the transmission parameter corresponding to the data multipath transmission with the PDU Set granularity.

[0111] As an example, Figure 3 As shown, in the PDU session creation process, the terminal sends a PDU session creation message to the Access and Mobility Management Function (AMF), and the PDU session creation message includes the above-mentioned first capability information. After AMF interacts with SMF to create a user session, SMF returns ASSSS rule information to the terminal, and the ASSS rule information includes PDU Set indication information and the first transmission parameter.

[0112] Step 203: When the PDU Set indication information indicates that data multipath transmission is performed at a granularity of PDU Set, the terminal performs data multipath transmission at a granularity of PDU Set according to the first transmission parameter.

[0113] In an embodiment of the present application, a terminal sends a first message, the first message is used to request to establish or update a PDU session of the MA PDU type, and the first message includes first capability information, the first capability information is used to indicate that the terminal supports the multi-path transmission capability of the PDU Set granularity; the terminal obtains a second message, the second message is sent by the SMF according to the first message, the second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multi-path transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate the transmission parameter corresponding to the data multi-path transmission with PDU Set granularity; when the PDU Set indication information indicates that data multi-path transmission is performed with PDU Set as the granularity, the terminal performs data multi-path transmission with PDU Set granularity according to the first transmission parameter. Through the above scheme, the terminal can perform data multi-path transmission with PDU Set granularity based on the transmission parameters corresponding to the data multi-path transmission with PDU Set granularity, so that the PDUs in the same PDU Set will not be distributed to different transmission paths, thereby effectively ensuring the transmission order of multiple PDUs in the PDU Set and improving the transmission performance.

[0114] Optionally, the terminal sends a first message, including:

[0115] Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type;

[0116] The first message is sent according to the connection capability information.

[0117] Optionally, the obtaining the connection capability information sent by the policy control function PCF includes:

[0118] The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

[0119] In an embodiment of the present application, a terminal with ATSSS (PDU Set granularity) capability matches the connection capability (Connection Capabilities) as XR and indicates the preferred multiple access type based on the URSP information (or URSP rule) provided by the PCF, thereby deciding whether to request an MA PDU session.

[0120] The connection capability in the embodiments of the present application adds the above-mentioned XR on the basis of the existing IP Multimedia Subsystem (IMS), Member Management System (MMS), Secure User Plane Location (SUPL), and Internet.

[0121] As an example, Figure 3 As shown, the terminal routing policy URSP information sent by the PCF can be obtained in the user registration process. Of course, the above URSP information can also be obtained in other processes, which is not specifically limited here.

[0122] Optionally, the first message includes session management (SM) capability information, the SM capability information includes ASSSS parameters, and the ATSSS parameters include the first capability information.

[0123] In an embodiment of the present application, the above-mentioned first capability information may be added to the existing ATSSS parameters so that the network can provide an MA PDU session that meets the terminal capabilities according to the terminal requirements.

[0124] Exemplarily, the above-mentioned SM capability information is 5G SM capability, and the above-mentioned first capability information can be added to the ASSS-ST parameter in the ASSS parameter of the 5G SM capability.

[0125] It should be noted that the first capability information or the second capability information in the embodiment of the present application can also be described as multipath PDU Set functionality (MP PDU Set functionality).

[0126] Optionally, the terminal performs data multipath transmission at a PDU Set granularity according to the first transmission parameter, including:

[0127] The terminal transmits multiple PDUs of the same PDU Set on the same transmission path according to the first transmission parameter, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0128] In the embodiment of the present application, the SMF adapts the ATSSS rule information of the PDU Set granularity according to the first message and sends it to the terminal. Figure 3 As shown, for XR service uplink data, the terminal performs multi-path transmission forwarding at the PDU Set granularity according to the ATSSS rule information, wherein the same PDU Set selects the same path.

[0129] In an embodiment of the present application, a terminal sends a first message, the first message is used to request to establish or update a PDU session of the MA PDU type, and the first message includes first capability information, the first capability information is used to indicate that the terminal supports the multi-path transmission capability of the PDU Set granularity; the terminal obtains a second message, the second message is sent by the SMF according to the first message, the second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multi-path transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate the transmission parameter corresponding to the data multi-path transmission with PDU Set granularity; when the PDU Set indication information indicates that data multi-path transmission is performed with PDU Set as the granularity, the terminal performs data multi-path transmission with PDU Set granularity according to the first transmission parameter. Through the above scheme, the terminal can perform data multi-path transmission with PDU Set granularity based on the transmission parameters corresponding to the data multi-path transmission with PDU Set granularity, so that the PDUs in the same PDU Set will not be distributed to different transmission paths, thereby effectively ensuring the transmission order of multiple PDUs in the PDU Set and improving the transmission performance.

[0130] like Figure 4 As shown, the embodiment of the present application also provides a data transmission method, including:

[0131] Step 401: The session management function SMF sends a second message to the terminal according to the first message, and sends a third message to the target user plane function UPF.

[0132] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0133] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0134] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0135] As an example, the SMF adds PDU Set indication information in the service descriptor of the ATSSS rule information, and adds the above-mentioned first transmission parameter in the access selection parameter.

[0136] In an embodiment of the present application, the SMF sends a second message to the terminal based on the first message, and sends a third message to the target user plane function UPF, so that the terminal and UPF can perform multi-path data transmission at the PDU Set granularity, thereby not distributing the PDUs in the same PDU Set to different transmission paths, thereby effectively ensuring the transmission order of multiple PDUs in the PDU Set and improving transmission performance.

[0137] In an embodiment of the present application, after receiving the first message, the SMF can create ATSSS rule information and N4 rule information based on the locally configured MA PDU session control information, or it can create ATSSS rule information and N4 rule information based on the PCC rule information.

[0138] Optionally, before sending the second message to the terminal and sending the third message to the UPF, the method further includes:

[0139] Obtaining policy and charging control PCC rule information sent by the PCF, where the PCC rule information includes MA PDU session control information, where the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, where the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity;

[0140] The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

[0141] In an embodiment of the present application, the SMF may create the above-mentioned ASSS rule information and the N4 rule information based on the PDU Set indication information in the PCC rule information and the third transmission parameter.

[0142] As an example, Figure 3 As shown, in the user session creation process, SMF sends the above ATSSS rule information to the terminal and sends the above N4 rule information to the target UPF (i.e. Figure 3 UPF in

[0143] In addition, the application function (AF) or the network exposure function (NEF) can also provide the SMF with PDU Set information and related control strategy information.

[0144] Optionally, before sending the third message to the target UPF, the method further includes:

[0145] According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

[0146] In an embodiment of the present application, the SMF sends a second message to the terminal based on the first message, and sends a third message to the target user plane function UPF, so that the terminal and UPF can perform multi-path data transmission at the PDU Set granularity, thereby not distributing the PDUs in the same PDU Set to different transmission paths, thereby effectively ensuring the transmission order of multiple PDUs in the PDU Set and improving transmission performance.

[0147] like Figure 5 As shown, the embodiment of the present application also provides a data transmission method, including:

[0148] Step 501: The target user plane function UPF obtains the N4 rule information sent by the session management function SMF, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate the transmission parameter corresponding to the data multipath transmission at the PDU Set granularity.

[0149] Step 502: The target UPF performs data multipath transmission at the PDU Set granularity according to the N4 rule information.

[0150] In an embodiment of the present application, the target user plane function UPF obtains the N4 rule information sent by the session management function SMF, the N4 rule information includes multipath PDU Set control information and a second transmission parameter, the multipath PDU Set control information is used to indicate the start of the transmission conversion of the multipath transmission traffic based on the PDU Set granularity, and the second transmission parameter is used to indicate the transmission parameter corresponding to the data multipath transmission at the PDU Set granularity; the target UPF performs the data multipath transmission at the PDU Set granularity according to the N4 rule information. Through the above scheme, the UPF can perform the data multipath transmission at the PDU Set granularity based on the transmission parameters corresponding to the data multipath transmission at the PDU Set granularity, so that the PDUs in the same PDUSet will not be distributed to different transmission paths, and thus the transmission order of multiple PDUs in the PDU Set can be effectively guaranteed, thereby improving the transmission performance.

[0151] Optionally, the target UPF performs data multipath transmission at a PDU Set granularity according to N4 rule information, including:

[0152] According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0153] like Figure 3 As shown, the target UPF performs multi-path transmission and forwarding at the PDU Set granularity for the XR service downlink data according to the N4 rule information, wherein the same PDU Set selects the same path.

[0154] Optionally, the method of the embodiment of the present application further includes:

[0155] A registration request message is sent to a network storage function (Network Repository Function, NRF), wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

[0156] It should be noted that in the embodiment of the present application, the target UPF can expand the above-mentioned second capability based on the existing function, for example, expand the above-mentioned second capability based on the ASSS-LL function, or independently expand the above-mentioned second capability.

[0157] like Figure 3As shown, in the network element service registration process, the target UPF extends the multipath PDU Set capability in the information registered with the NRF so that the NRF can select a qualified UPF when providing service discovery for the network function (NF) (such as SMF).

[0158] The solution of the present application is described in detail below with reference to embodiments.

[0159] In the first embodiment of the present application, UPF initiates a registration request message to NRF. Specifically, the PUT request initiated by UPF provides the NF description (Profile) of UPF. UPF adds the above-mentioned second capability information to the ATSSS capability (Capability) information of UPF information (upfInfo). NRF processes the registration request of UPF. If the request is approved, NRF saves the information that the ASSSS capability in upfInfo supports the second capability and returns a registration success message.

[0160] In the second embodiment of the present application, SMF sends a service discovery request to NRF, and the service discovery request includes query parameters (query parameters), and the ATSSS capability of the query parameter includes PDU Set granularity multipath transmission capability, that is, the service discovery request is used to request the UPF that supports the PDU Set granularity multipath transmission capability; NRF selects the UPF that supports the PDU Set granularity multipath transmission capability based on the service discovery request of SMF and sends it to SMF.

[0161] In the third embodiment of the present application, the URSP extended XR type connection capability is supported in the registration process. Specifically, the terminal sends a registration request, and after processing the registration request of the terminal according to the existing protocol scheme, the AMF sends a registration acceptance message to the terminal, and the registration acceptance message provides an MA PDU session support indicator to notify the terminal whether it supports ATSSS. The UE uses this indicator to determine whether it can initiate a process related to the MA PDU session; then, the new AMF sends a UE policy control creation request (Npcf_UEPolicyControl creation request) to the PCF, and the PCF sends a UE policy control creation response (Npcf_UEPolicyControl creation response) to the new AMF. Specifically, the XR type is added to the connection capability parameter of the URSP service descriptor of the UE policy control creation response, so that the UE with ASSS (PDU Set granularity) capability can match the Connection Capabilities to XR and indicate the preferred multi-access type based on the provided URSP rules, thereby deciding whether to request an MA PDU session.

[0162] It should be noted that the AMF provides the MA PDU session support indicator, which does not distinguish the specific ASSSS capability type, but only indicates whether the ASSSS capability is available.

[0163] In the fourth embodiment of the present application, the connection capability of the extended XR type is supported during the UE configuration update process. Specifically, the PCF decides to update the UE policy according to the trigger condition; the PCF calls the forwarding N1N2 message (Namf_Communication_N1N2MessageTransfer), and extends and adds the XR type in the connection capability (Connection Capabilities) of the URSP service descriptor parameter of the UE policy container (Policy Container) contained therein; the UE updates the UE policy provided by the PCF, and supports the XR type added by the extension of the Connection Capabilities in the URSP.

[0164] In the fifth embodiment of the present application, the process of creating an MA PDU session by a UE with an ATSSS function includes:

[0165] Step 1: The UE provides the request type as "MA PDU Request" in the downlink non-access stratum (UL NAS) transmission message, and provides its ATSSS capability in the PDU session establishment request message. The ATSSS capability parameter is extended to support the multi-path PDU Set (MP PDUset) capability, that is, the first capability.

[0166] Specifically, the UE session capability (5GSM Core Network Capability) parameter ATSSS is extended to add multipath PDU Set functionality (MP PDU Set functionality).

[0167] In this step, the UE sends the above-mentioned PDU session establishment request to the AMF. After receiving the PDU session establishment request, the AMF processes it according to the existing protocol and selects the PCF.

[0168] Step 2: PCF provides PCC Rule (PCC Rule) including MA PDU Session Control information to SMF. The MA PDU Session Control information in PCC Rule extends PDU Set indication parameter (ie, PDU Set indication information (PDU Setindicator)) and adds MP PDUSet functionality in Steering Functionality.

[0169] Step 3: SMF selects UPF.

[0170] Specifically, based on the ATSSS capability (MP PDU Set functionality) information carried in the UE session request, select the UPF that supports ASSSS Capability (MP PDU Set functionality).

[0171] Step 4: SMF extends the N4 rule (N4 Rule) sent to UPF: add PDU Set granularity multipath transmission control information (MP PDU Set Control Information), and add MP PDU Set functionality in the Multi-Access Rule, that is, the second transmission parameter mentioned above.

[0172] The above-mentioned PDU Set granularity multipath transmission control information is the above-mentioned multipath PDU Set control information.

[0173] Step 5: SMF extends the ATSSS Rule sent to the UE: the ASSSS rule adds a PDUSet indication parameter (ie, PDU Set indication information) in the MA PDU session message, and adds MP PDUSet functionality (ie, the first capability information) in the access selection parameter.

[0174] After SMF extends the ATSSS Rule, it processes it according to the existing protocol and sends a PDU session establishment accept message to the UE through the RAN.

[0175] Step 6: The UE receives a PDU Session Establishment Accept message, which indicates to the UE that the requested MA PDU session has been successfully established. The message includes the addition of the PDU Set indicator parameter in the ATSSS rule and the MP PDUSet functionality.

[0176] In the sixth embodiment of the present application, the process of the UE or the network requesting an MA PDU session update includes:

[0177] Step 1: UE sends a PDU session update request message to AMF.

[0178] After AMF interacts with the visited SMF (V-SMF), visited UPF (V-UPF) and home SMF (H-SMF) according to the existing protocol, H-SMF sends a PDU session update response to V-SMF.

[0179] Step 2: H-SMF may decide to update ASSS rules and / or N4 rules based on the updated PCC rules.

[0180] Specifically, when the ATSSS rule and / or the N4 rule is updated, parameter information related to the multipath transmission capability at the PDU set granularity is added therein.

[0181] Step 3: H-SMF triggers a PDU session update (Nsmf_PDU Session_update) request, which includes the updated ATSSS rules. The ATSSS rules add a PDU Set indicator parameter (PDU Set indicator), and add MP PDU Set functionality (i.e., the first capability information) to the access selection parameters in the ATSSS rules.

[0182] Step 4: H-SMF updates N4 Rule: adds PDU Set granularity multipath transmission control information (MP PDU Set Control Information), and adds MP PDUSet functionality (ie, the second capability information) in the multi-access rule (Multi-Access Rule) of N4 Rule.

[0183] Step 5: If the H-SMF provides updated ATSSS rules, the V-SMF includes the updated ASSSS rules in the N1SM container (PDU Session Modification Command).

[0184] The subsequent steps are handled according to the existing protocol and will not be described in detail here.

[0185] In the seventh embodiment of the present application, the PDU Set granularity multi-path diversion forwarding process of the uplink traffic of the UE with ATSSS function, for the UE side: the UE has MP PDU Set functionality, and supports multi-path data transmission on the established MA PDUSession; the UE performs multi-path diversion according to the PDUSet granularity for the XR APP service based on the ATSSS Rule issued by the SMF, and the same PDU Set is diverted to the same path. Figure 6 As shown, PDU Set 1 includes 3 PDUs, all of which are transmitted through a 3GPP access path; PDU Set 2 includes 2 PDUs, all of which are transmitted through a Non-3GPP access path.

[0186] UPF side: UPF has MP PDU Set functionality and supports multi-path data transmission on the established MA PDUSession; UPF receives PDU Set1 and PDU Set2 messages transmitted from different paths and forwards them to DN after service processing. Figure 6 As shown, the data forwarded by UPF to the data network (DN) still maintains the original order of the messages in the same PDU Set.

[0187] Compared with the solution that does not support PDU Set granularity multi-path transmission, the solution of the embodiment of the present application is that the UE may divert the same PDU Set to different transmission paths, which may cause disorder between different PDUs in the same PDU Set when the UPF receives it, thereby affecting the service quality and service experience.

[0188] In the embodiment of the present application, there is no strict requirement for the order between different PDU Sets. For example, when the UPF transfers the message to the DN side, PDU Set1 or PDU Set2 may be sent first, or the messages of PDU Set1 and PDU Set2 may be sent at intervals, but the order of messages within the same PDU Set remains relatively unchanged.

[0189] The UE allocates uplink traffic on different paths for different PDU Sets based on the ATSSS rule, and may also be combined with other conditions, such as network interface availability, access performance measurement results of different paths, etc., which are not limited in this document.

[0190] The same applies to downstream traffic, which will not be described here.

[0191] In the eighth embodiment of the present application, the PDU Set granularity multi-path diversion forwarding process of the downlink traffic of the UPF with ATSSS function, for the UPF side: UPF has the MP PDU Set functionality capability, and supports multi-path data transmission on the established MAPDU Session. UPF receives the XR service message on the DN side, identifies the message of the XR service according to the multi-access forwarding rule in the N4 Rule, and performs multi-path transmission according to different PDU Sets respectively, and the same PDU Set is diverted to the same path. Figure 7 As shown, PDU Set1 includes 3 PDUs, all of which are transmitted through the 3GPP Access access path; PDU Set2 includes 2 PDUs, all of which are transmitted through the Non-3GPP access path.

[0192] UE side: UE has MP PDU Set functionality and supports multi-path data transmission on the established MA PDU Session. UE receives PDU Set1 and PDU Set2 messages transmitted from different paths and sends them to XR APP. Figure 7 As shown in the figure, the messages sent from the UE to the XR APP still maintain the original order in the same PDU Set.

[0193] The solution of the embodiment of the present application provides a multi-path transmission technology with PDU Set granularity, so that XR media services can improve network performance and user experience through the multi-path transmission technology with PDU Set granularity.

[0194] like Figure 8 As shown, an embodiment of the present application provides a data transmission device, which is applied to a terminal. The device includes a memory 820, a transceiver 800, and a processor 810;

[0195] The memory 820 is used to store computer programs; the transceiver 800 is used to send and receive data under the control of the processor 810; the processor 810 is used to read the computer program in the memory 820 and perform the following operations:

[0196] Sending a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity;

[0197] Obtain a second message, where the second message is sent by the session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0198] When the PDU Set indication information indicates that data multipath transmission is performed with PDU Set as the granularity, data multipath transmission is performed with PDU Set as the granularity according to the first transmission parameter.

[0199] Among them, Figure 8In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 810 and various circuits of memory represented by memory 820 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 800 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, including transmission media such as wireless channels, wired channels, and optical cables. For different user devices, the user interface 830 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0200] The processor 810 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 810 when performing operations.

[0201] Optionally, the processor 810 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0202] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0203] Optionally, the processor further implements the following steps:

[0204] Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type;

[0205] The first message is sent according to the connection capability information.

[0206] Optionally, the processor further implements the following steps:

[0207] The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

[0208] Optionally, the first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

[0209] Optionally, the processor further implements the following steps:

[0210] According to the first transmission parameter, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0211] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data transmission method embodiment applied to the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0212] like Fig. 9 As shown, the embodiment of the present application further provides a data transmission device, which includes a memory 920, a transceiver 900, and a processor 910;

[0213] A memory 920, for storing computer programs; a transceiver 900, for transmitting and receiving data under the control of the processor;

[0214] In an embodiment of the present application, the processor 910 is configured to send a second message to the terminal according to the first message, and send a third message to the target user plane function UPF;

[0215] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0216] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0217] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0218] Optionally, the processor further implements the following steps:

[0219] Obtaining policy and charging control PCC rule information sent by the PCF, where the PCC rule information includes MA PDU session control information, where the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, where the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity;

[0220] The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

[0221] Optionally, the processor further implements the following steps:

[0222] According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

[0223] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data transmission method embodiment applied to SMF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0224] In one embodiment of the present application, the processor 910 is configured to read the computer program in the memory and perform the following operations:

[0225] Obtain N4 rule information sent by the session management function SMF, the N4 rule information including multipath PDU Set control information and a second transmission parameter, the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity;

[0226] According to the N4 rule information, multi-path data transmission is performed at the PDU Set granularity.

[0227] Optionally, the processor further implements the following steps:

[0228] According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

[0229] Optionally, the processor further implements the following steps:

[0230] A registration request message is sent to the network storage function NRF, wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

[0231] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data input method embodiment applied to the target UPF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0232] Among them, Fig. 9 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 910 and various circuits of memory represented by memory 920 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 900 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 910 when performing operations.

[0233] The processor 910 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0234] like Fig.10 As shown, the embodiment of the present application also provides a data transmission device, including:

[0235] A first sending unit 1001 is configured to send a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity;

[0236] A first acquisition unit 1002 is used to acquire a second message, where the second message is sent by a session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission with PDU Set granularity;

[0237] The first transmission unit 1003 is configured to perform data multipath transmission at a PDU Set granularity according to the first transmission parameter when the PDU Set indication information indicates that data multipath transmission is performed at a PDU Set granularity.

[0238] Optionally, the first sending unit includes:

[0239] A first acquisition subunit is configured to acquire connection capability information sent by a policy control function PCF, where the connection capability information includes an extended reality XR type;

[0240] The first sending subunit is configured to send the first message according to the connection capability information.

[0241] Optionally, the first acquisition subunit is used to acquire the terminal routing policy URSP information sent by the PCF, the URSP information includes a service descriptor, and the service descriptor contains the connection capability information.

[0242] Optionally, the first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

[0243] Optionally, the first transmission unit is used to transmit multiple PDUs of the same PDU Set on the same transmission path according to the first transmission parameter, and the PDU Set is a PDU Set corresponding to the extended reality XR service.

[0244] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data transmission method embodiment applied to the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0245] like Fig.11 As shown, the embodiment of the present application also provides a data transmission device, including:

[0246] The second sending unit 1101 is used to send a second message to the terminal according to the first message, and send a third message to the target user plane function UPF;

[0247] The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDUSet granularity;

[0248] The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity;

[0249] The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

[0250] Optionally, the device of the embodiment of the present application further includes:

[0251] A third acquisition unit is configured to acquire, before the second sending unit sends the second message to the terminal and sends the third message to the UPF, the policy and charging control PCC rule information sent by the PCF, wherein the PCC rule information includes the MA PDU session control information, and the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, wherein the third transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission of the PDU Set granularity;

[0252] A creating unit is used to create the ATSSS rule information and the N4 rule information according to the PCC rule information.

[0253] Optionally, the device of the embodiment of the present application further includes:

[0254] A selection unit is used to select a UPF that supports multi-path transmission capability with PDU Set granularity as the target UPF according to the first message before the second sending unit sends the third message to the target UPF.

[0255] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data transmission method embodiment applied to SMF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0256] like Fig.12 As shown, the embodiment of the present application also provides a data transmission device, including:

[0257] The second acquisition unit 1201 is used to acquire N4 rule information sent by the session management function SMF, where the N4 rule information includes multipath PDU Set control information and a second transmission parameter, where the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity;

[0258] The second transmission unit 1202 is used to perform multi-path transmission of data at the PDU Set granularity according to the N4 rule information.

[0259] Optionally, the second transmission unit is used to transmit multiple PDUs of the same PDU Set on the same transmission path according to the N4 rule information, and the PDU Set is a PDU Set corresponding to the extended reality XR service.

[0260] Optionally, the device of the embodiment of the present application further includes:

[0261] The third sending unit is used to send a registration request message to the network storage function NRF, and the registration request message includes second capability information, and the second capability information is used to indicate that the target UPF supports the multi-path transmission capability of PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports the multi-path transmission capability of PDU Set granularity.

[0262] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned data transmission method embodiment applied to the target UPF, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0263] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0264] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0265] In some embodiments of the present application, a processor-readable storage medium is also provided, which stores program instructions, and the program instructions are used to enable the processor to execute all the steps implemented in the above-mentioned data transmission method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0266] The terminal device involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0267] The network device (or network side device) involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base TransceiverStation, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the Long Term Evolution (Long Term Evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0268] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0269] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0270] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0271] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0272] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0273] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A data transmission method, characterized in that: include: The terminal sends a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MAPDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity; The terminal obtains a second message, where the second message is sent by a session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission with PDU Set granularity; When the PDU Set indication information indicates that data multipath transmission is performed with PDU Set as the granularity, the terminal performs data multipath transmission with PDU Set granularity according to the first transmission parameter.

2. The method according to claim 1, characterized in that The terminal sends a first message, including: Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type; The first message is sent according to the connection capability information.

3. The method according to claim 2, characterized in that The obtaining of the connection capability information sent by the policy control function PCF includes: The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

4. The method according to any one of claims 1 to 3, characterized in that: The first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

5. The method according to claim 1, characterized in that The terminal performs, according to the first transmission parameter, data multipath transmission at a PDUSet granularity, including: The terminal transmits multiple PDUs of the same PDU Set on the same transmission path according to the first transmission parameter, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

6. A data transmission method, characterized in that: include: The session management function SMF sends a second message to the terminal according to the first message, and sends a third message to the target user plane function UPF; The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDU Set granularity; The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity; The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

7. The method according to claim 6, characterized in that Before sending the second message to the terminal and sending the third message to the UPF, the method further includes: Obtaining policy and charging control PCC rule information sent by the PCF, where the PCC rule information includes MA PDU session control information, where the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, where the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity; The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

8. The method according to claim 6, characterized in that Before sending the third message to the target UPF, the method further includes: According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

9. A data transmission method, characterized in that: include: The target user plane function UPF obtains the N4 rule information sent by the session management function SMF, where the N4 rule information includes multipath PDU Set control information and a second transmission parameter, where the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity; The target UPF performs multipath transmission of data at the PDU Set granularity according to the N4 rule information.

10. The method according to claim 9, characterized in that The target UPF performs multi-path data transmission at the PDUSet granularity according to the N4 rule information, including: According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

11. The method according to claim 9, characterized in that Also includes: A registration request message is sent to the network storage function NRF, wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

12. A data transmission device, characterized in that: Including memory, transceiver, processor; a memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Sending a first message, where the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, where the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity; Obtain a second message, where the second message is sent by the session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity; When the PDU Set indication information indicates that data multipath transmission is performed with PDU Set as the granularity, data multipath transmission is performed with PDU Set as the granularity according to the first transmission parameter.

13. The device according to claim 12, characterized in that The processor also implements the following steps: Obtaining connection capability information sent by the policy control function PCF, where the connection capability information includes an extended reality XR type; The first message is sent according to the connection capability information.

14. The device according to claim 13, characterized in that The processor also implements the following steps: The terminal routing policy URSP information sent by the PCF is obtained, where the URSP information includes a service descriptor, and the service descriptor includes the connection capability information.

15. The device according to any one of claims 12 to 14, characterized in that The first message includes session management SM capability information, the SM capability information includes ASSS parameters, and the ASSS parameters include the first capability information.

16. The device according to claim 12, characterized in that The processor also implements the following steps: According to the first transmission parameter, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

17. A data transmission device, characterized in that: Including memory, transceiver, processor; A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: According to the first message, send a second message to the terminal, and send a third message to the target user plane function UPF; The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDU Set granularity; The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity; The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

18. The device according to claim 17, characterized in that The processor also implements the following steps: Obtaining policy and charging control PCC rule information sent by the PCF, where the PCC rule information includes MA PDU session control information, where the MA PDU session control information includes the PDU Set indication information and a third transmission parameter, where the third transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at a PDU Set granularity; The ATSSS rule information and the N4 rule information are created according to the PCC rule information.

19. The device according to claim 17, characterized in that The processor also implements the following steps: According to the first message, a UPF that supports multipath transmission capability with PDU Set granularity is selected as the target UPF.

20. A data transmission device, characterized in that: Including memory, transceiver, processor; A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Obtain N4 rule information sent by the session management function SMF, the N4 rule information including multipath PDU Set control information and a second transmission parameter, the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at PDU Set granularity; According to the N4 rule information, multi-path data transmission is performed at the PDU Set granularity.

21. The device according to claim 20, characterized in that The processor also implements the following steps: According to the N4 rule information, multiple PDUs of the same PDU Set are transmitted on the same transmission path, and the PDU Set is the PDU Set corresponding to the extended reality XR service.

22. The device according to claim 20, characterized in that The processor also implements the following steps: A registration request message is sent to the network storage function NRF, wherein the registration request message includes second capability information, wherein the second capability information is used to indicate that the target UPF supports multipath transmission capability with PDU Set granularity, and the N4 rule information is sent by the SMF when the target UPF supports multipath transmission capability with PDU Set granularity.

23. A data transmission device, characterized in that: include: A first sending unit, configured to send a first message, wherein the first message is used to request to establish or update a PDU session of a multiple access protocol data unit MAPDU type, and the first message includes first capability information, wherein the first capability information is used to indicate that the terminal supports a multipath transmission capability of a protocol data unit set PDU Set granularity; a first acquisition unit, configured to acquire a second message, where the second message is sent by a session management function SMF according to the first message, where the second message includes access traffic steering, switching and segmentation ATSSS rule information, where the ATSSS rule information includes PDU Set indication information and a first transmission parameter, where the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as a granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission with a PDU Set granularity; The first transmission unit is used to perform data multipath transmission with a PDU Set granularity according to the first transmission parameter when the PDU Set indication information indicates that data multipath transmission is performed with a PDU Set as a granularity.

24. A data transmission device, characterized in that: include: A second sending unit, configured to send a second message to the terminal according to the first message, and send a third message to a target user plane function UPF; The first message is used to request to establish or update a PDU session of a multiple access protocol data unit MA PDU type, and the first message includes first capability information, and the first capability information is used to indicate that the terminal supports a multipath transmission capability of a PDU Set granularity; The second message includes ATSSS rule information, the ATSSS rule information includes PDU Set indication information and a first transmission parameter, the PDU Set indication information is used to indicate whether to perform data multipath transmission with PDU Set as the granularity, and the first transmission parameter is used to indicate a transmission parameter corresponding to the data multipath transmission with the PDU Set granularity; The third message includes N4 rule information, and the N4 rule information includes multipath PDU Set control information and a second transmission parameter. The multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate transmission parameters corresponding to data multipath transmission at PDU Set granularity.

25. A data transmission device, characterized in that: include: A second acquisition unit is used to acquire N4 rule information sent by the session management function SMF, where the N4 rule information includes multipath PDU Set control information and a second transmission parameter, where the multipath PDU Set control information is used to indicate the start of transmission conversion of multipath transmission traffic based on PDU Set granularity, and the second transmission parameter is used to indicate a transmission parameter corresponding to data multipath transmission at the PDU Set granularity; The second transmission unit is used to perform multi-path transmission of data at a PDU Set granularity according to the N4 rule information.

26. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the steps of the data transmission method as described in any one of claims 1 to 5, or to implement the steps of the data transmission method as described in any one of claims 6 to 8, or to implement the steps of the data transmission method as described in any one of claims 9 to 11.

Images