CN118102235A

CN118102235A - Data transmission method and device

Info

Publication number: CN118102235A
Application number: CN202211506428.4A
Authority: CN
Inventors: 李芸; 胡渭琦
Original assignee: Shanghai Datang Mobile Communications Equipment Co ltd
Current assignee: Shanghai Datang Mobile Communications Equipment Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2024-05-28
Also published as: WO2024114503A1

Abstract

The embodiment of the application provides a data transmission method and device, wherein the method comprises the following steps: receiving a first message sent by first network equipment, wherein the first message comprises a first identifier and a first transmission parameter, and the first identifier is used for indicating a second message carrying the first transmission parameter and sending time of the second message; and under the condition that the triggering target flow is determined, sending a second message carrying the first transmission parameter to second network equipment according to the sending time of the second message. The data transmission method and the data transmission device provided by the embodiment of the application are used for reducing the requirements on the communication capacity of the terminal equipment.

Description

Data transmission method and device

Technical Field

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

Background

Protocol Data unit (Protocol Data Unit, PDU) session provides Data connectivity between the terminal device and the Data Network (DN), all Data traffic of the terminal device being carried through the PDU session.

In the related art, a Network Function (NF) in a core Network sends information carrying a specific parameter to a terminal device, and after receiving the information, the terminal device needs to have a capability of identifying the specific parameter, and also needs to know how to send the specific parameter to other devices to perform a related procedure initiated by the terminal device (for example, a procedure related to the PDU session).

In the above related art, the terminal device needs to have the capability of identifying the specific parameter, and also needs to know how to send the specific parameter to other devices, and the requirement on the communication capability of the terminal device is high. Therefore, how to reduce the requirement on the communication capability of the terminal device in the process of performing the related flow becomes a technical problem to be solved.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, which are used for solving the defect of higher requirement on the communication capacity of terminal equipment in the prior art and realizing the reduction of the requirement on the communication capacity of the terminal equipment.

In a first aspect, an embodiment of the present application provides a data transmission method, applied to a terminal device, including:

Receiving a first message sent by first network equipment, wherein the first message comprises a first identifier and a first transmission parameter, and the first identifier is used for indicating a second message carrying the first transmission parameter and sending time of the second message;

and under the condition that the triggering target flow is determined, sending a second message carrying the first transmission parameter to second network equipment according to the sending time of the second message.

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Optionally, in the case of determining to trigger the target flow, sending, according to the sending opportunity of the second message, the second message carrying the first transmission parameter to the second network device, where the sending method includes:

searching a second message carrying the first transmission parameter and sending time of the second message indicated by the first identifier in a preset list, wherein the preset list comprises a plurality of identifiers and messages corresponding to the identifiers and sending time of the messages;

Optionally, the second message carrying the first transmission parameter includes any one or more of the following:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

Optionally, the sending timing of the second message includes one or more of the following:

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

Optionally, the second message further includes one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

Optionally, the first transmission parameter includes one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

Optionally, the receiving the first message sent by the first network device includes:

receiving a first message sent by network equipment in a first distributed network node, wherein the first message comprises a first identifier and target DNAI information;

Under the condition that the triggering target flow is determined, according to the sending time of the second message, sending the second message carrying the first transmission parameter to the second network equipment, wherein the method comprises the following steps:

Under the condition that the PDU session establishment procedure is determined to be triggered, determining the sending time of the PDU session establishment request message indicated by the first identifier and the second message carrying the target DNAI information as PDU session establishment request cancellation;

And sending the PDU session establishment request message carrying the target DNAI information to network equipment in a second distributed network node according to the sending time of the PDU session establishment request message.

receiving a first message sent by a base station, wherein the first message comprises a first identifier and DNN, S-NSSAI;

Under the condition that the PDU session establishment flow or the PDU session release flow is determined to be triggered, determining the sending time of the registration request message indicated by the first identifier and the second message carrying the DNN and the S-NSSAI as the registration request message;

and according to the sending time of the registration request message, sending the registration request message carrying the DNN and the S-NSSAI to network equipment containing an access and mobility management function (AMF).

In a second aspect, the present invention provides a terminal device, including: memory, transceiver, processor;

the memory is used for storing a computer program;

the transceiver is used for receiving and transmitting data under the control of the processor;

The processor is configured to read the computer program in the memory and perform the following operations:

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Optionally, the processor is specifically configured to:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

Optionally, the sending opportunity of the second message includes one or more of the following:

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

Optionally, the second message further includes one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

Optionally, the first transmission parameter includes one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

Optionally, the processor is specifically configured to:

And according to the sending time of the PDU session establishment request message, the PDU session establishment request message is sent to network equipment in a second distributed network node.

Optionally, the processor is specifically configured to:

In a third aspect, an embodiment of the present application provides a data transmission apparatus, applied to a terminal device, including:

A receiving module, configured to receive a first message sent by a first network device, where the first message includes a first identifier and a first transmission parameter, and the first identifier is used to indicate a second message carrying the first transmission parameter and a sending opportunity of the second message;

And the sending module is used for sending the second message carrying the first transmission parameter to the second network equipment according to the sending time of the second message under the condition that the triggering target flow is determined.

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Optionally, the sending module is specifically configured to:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

Optionally, the second message further includes one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

Optionally, the first transmission parameter includes one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

Optionally, the receiving module is specifically configured to:

The sending module is specifically used for:

Optionally, the receiving module is specifically configured to:

The sending module is specifically used for:

In a fourth aspect, the present application also provides a processor-readable storage medium storing a computer program which, when executed by a processor, implements a data transmission method as any one of the above.

In a fifth aspect, the application also provides a computer program product comprising a computer program which, when executed by a processor, implements a data transmission method as any one of the above.

According to the data transmission method and device provided by the embodiment of the application, the terminal equipment sends the second message carrying the first transmission parameter to the second network equipment according to the sending time of the second message under the condition that the trigger target flow is determined based on the second message carrying the first transmission parameter and the sending time of the second message, the terminal equipment does not need to have the capability of identifying the first transmission parameter, the capability of knowing how to send the specific parameter to other equipment based on the configuration of the terminal equipment or the indication of the terminal equipment, and the requirement on the communication capability of the terminal equipment is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present application;

FIG. 2 is a second flow chart of a data transmission method according to the embodiment of the application;

FIG. 3 is a third flow chart of a data transmission method according to an embodiment of the application;

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

FIG. 5 is a fifth flowchart of a data transmission method according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.

Detailed Description

The terminal device according to 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, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as Personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal DIGITAL ASSISTANT, PDA) and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (ACCESS TERMINAL), user terminal device (user terminal), user agent (user agent), user equipment (user device), and embodiments of the present application are not limited.

Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present application. As shown in fig. 1, the method includes:

Step 101, receiving a first message sent by a first network device, where the first message includes a first identifier and a first transmission parameter, and the first identifier is used to indicate a second message carrying the first transmission parameter and a sending time of the second message.

The execution main body of the data transmission method provided by the embodiment of the application can be terminal equipment or a data transmission device arranged on the terminal equipment, and the data transmission device can be realized by combining software and/or hardware.

The first network device may be, for example, a device included in a Network Function (NF) or a base station (bs). Here NF may be, for example, an access and mobility management function (ACCESS AND mobility management function, AMF), a session management function (Session Management Function, SMF), etc.

Alternatively, the first transmission parameter may be in a visible state or an invisible state.

In the case of the first transmission parameter being in an invisible state, the first transmission parameter is a black box for the terminal device, which does not recognize the first transmission parameter and only forwards the first transmission parameter.

In case the first transmission parameter is in a visible state, the terminal device may identify the first transmission parameter using, for example, a decryption algorithm.

Step 102, under the condition that the trigger target flow is determined, sending a second message carrying the first transmission parameter to the second network equipment according to the sending time of the second message.

The second network device may be, for example, a device that includes NF. Here NF may also be AMF, SMF, etc.

In the case where the first network device is a device of the NFs including the core network, the NF in the first network device may be, for example, AMF 1, and the NF in the second network device may be AMF 2.

In the data transmission method provided in the embodiment of fig. 1, the terminal device indicates the second message carrying the first transmission parameter and the sending time of the second message, and sends the second message carrying the first transmission parameter to the second network device according to the sending time of the second message under the condition that the trigger target flow is determined, so that the terminal device does not need to have the capability of identifying the first transmission parameter, and does not need to have the capability of knowing how to send the specific parameter to other devices based on the configuration of the terminal device or the indication of the terminal device, thereby reducing the requirement on the communication capability of the terminal device and reducing the requirement on the communication capability of the terminal device.

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Alternatively, the target procedure may be another procedure actively triggered by the terminal device, such as a registration procedure of the terminal device, which is not illustrated here.

Optionally, in the case of determining to trigger the target flow, sending, according to the sending timing of the second message, the second message carrying the first transmission parameter to the second network device, including:

The preset list may be a list configured by the terminal device and is stored in the terminal device in advance. Alternatively, the preset list may be a list of protocol conventions, and from there, the protocol may be any protocol negotiated by a terminal device (UE) and NF.

In the application, the terminal equipment queries the preset list based on the first identifier to obtain the second message carrying the first transmission parameter and the sending time of the second message indicated by the first identifier, and the network side equipment does not need to independently indicate the sending time and the second message to the terminal, and does not need to carry the sending time and the second message in the related message, thereby reducing the transmission complexity between the network side equipment and the terminal equipment.

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

A Non-access Stratum (NAS) message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

For example, in the case where the transmission occasion of the second message includes the transmission occasion of the registration request message, the second message carrying the first transmission parameter includes the registration request message.

For example, in the case where the transmission timing of the second message includes the transmission timing of the PDU session modification command message and the transmission timing of the PDU session release request message, the second message carrying the first transmission parameter includes the PDU session modification command message and the PDU session release request message.

Optionally, the second message further includes one or more of the following:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

The valid duration indicates that the first transmission parameter can successfully trigger the target flow within the duration. For example, the effective duration is 2 minutes, meaning that the first transmission parameter may be used to trigger the target procedure within 2 minutes after the first transmission parameter is received.

The validation time indicates the time at which the first transmission parameter can be used to trigger the target flow. For example, the validation time is 1 minute 53 seconds, and at 0 minute 53 seconds, the first transmission parameter cannot be used to trigger the target flow, and at 1 minute 53 seconds, the first transmission parameter can be used to trigger the target flow.

The number of validations represents the total number of times the target procedure is triggered. For example, the number of validation times is 5, which means that the first transmission parameter may be used in the case that the target flow needs to be triggered 5 times.

Optionally, the first transmission parameter includes one or more of:

Target Data Network access identifier (Data Network ACCESS IDENTIFIER, DNAI) information;

data network name (Data Network Name, DNN);

Single network slice selection assistance information (Single Network Slice Selection Assistance information, S-NSSAI).

For example, in a distributed network architecture scenario, the first transmission parameters may include target DNAI information.

For example, the first transmission parameters may include DNN and S-NSSAI during a PDU session establishment by the SMF originating terminal or during a PDU session release by the SMF originating terminal.

Optionally, the first transmission parameters may include other parameters besides the target DNAI information, DNN, and S-NSSAI.

correspondingly, under the condition that the triggering target flow is determined, according to the sending time of the second message, sending the second message carrying the first transmission parameter to the second network equipment, wherein the sending method comprises the following steps:

Specifically, in the case of determining to trigger the PDU Session establishment procedure, taking Session AND SERVICE Continuity (SSC) mode 2 (mode 2) as an example, in conjunction with fig. 2, in a distributed network architecture scenario, the data transmission method provided by the present invention is described.

Fig. 2 is a second flowchart of a data transmission method according to an embodiment of the application. As shown in fig. 2, the method includes:

step 201, SMF1 in the first distributed network node decides to change the user plane function (User Plane Function, UPF).

Step 201a, if the UPF (PSA) cannot connect to the data network indicated by the target DNAI information (TARGET DNAI info) received from the SM-PCF by the SMF1, the SMF1 will invoke an SM context state notification request (Nsmf _ PDUSession _ SMContextStatusNotify Request) service operation to the AMF1 in the first distributed network node.

SMF1 indicates whether a reselection of SMF is required.

Nsmf _ PDUSession _ SMContextStatusNotify Request carries the target DNAI information.

The destination DNAI information is used for SMF selection and can control the UPF connected to the DNAI towards the same DNN and S-NSSAI at the next PDU session establishment.

Since the target DNAI information is for SMF selection, the AMF stores the target DNAI information received from the SMF.

TARGET DNAI info are not externally transmitted, e.g., protocols may support UE context transmission between AMFs to enable relocation of the AMFs.

Alternatively, the AMF may send Nsmf _ PDUSession _ SMContextStatusNotify Response to SMF 1.

Step 202, a PDU session release procedure (with the original UPF, namely UPF 1) is performed.

Step 202a, AMF1 sends a PDU session release command (PDU Session Release Command) message (i.e. a first message) to the terminal device, where the PDU session release command message includes a first identifier and target DNAI information (a first transmission parameter).

AMF1 is the NF in the first network device.

The PDU session release order message triggers the PDU session release procedure.

In step 203a, the terminal device searches that the second message carrying the target DNAI information indicated by the first identifier is a PDU session establishment request message in the preset list, where the sending time of the second message is the sending time of the PDU session establishment request message, and in the PDU session establishment procedure (and the new UPF), the sending time of the PDU session establishment request message sends the PDU session establishment request message to AMF2 in the second distributed network node, where the PDU session establishment request message carries the target DNAI information.

Step 204, the terminal device and the UPF2 perform uplink/downlink Data transmission (UL/DL Data).

Next, in the case of determining the PDU session establishment procedure, the data transmission method provided by the present invention will be described in a distributed network architecture scenario with reference to fig. 3, taking SSC mode3 as an example.

Fig. 3 is a third flowchart of a data transmission method according to an embodiment of the application. As shown in fig. 3, the method includes:

step 301, the SMF1 in the first distributed network node decides to change the UPF or SMF of the service.

Step 301a, if the UPF (PSA) cannot connect to the data network indicated by the destination DNAI information received by SMF1 from the SM-PCF, SMF1 will invoke an SM context state notification request (i.e., nsmf _ PDUSession _ SMContextStatusNotify Request (carrying destination DNAI information)) service operation to the AMF.

SMF indicates that SMF is expected to be selected.

If run-time coordination between 5GC and AF is enabled, SMF1 will request SMContext ID in Nsmf _ PDUSession _ SMContextStatusNotify as a reference to SMContext stored in SMF1 that contains AF coordination information.

Since the target DNAI information is for SMF selection, the AMF stores the target DNAI information received from the SMF selection. The target DNAI information is not externally transmitted, e.g., the protocol supports UE context transmission between AMFs to enable relocation of the AMFs.

Alternatively, the AMF may send an SM context state notification response (Nsmf _ PDUSession _ SMContextStatusNotify Response) to SMF 1.

Step 302, if SMF1 has sent an early notification to the AF and the runtime coordination between 5GC and AF is enabled according to the local configuration, the SMF waits for a notification response from the AF according to the indication of "expected AF acknowledgement" contained in the AF subscription SMF event.

The SMF may stop the procedure if it receives a negative notification response from the AF.

The SMF invokes an N1N2message transfer (Namf _communication_n1n2 MESSAGETRANSFER).

Namf _communication_n1n MESSAGETRANSFER carries: a PDU Session identification (PDU Session ID), an SMF reassignment request indication (SMF Reallocation requested indication), an N1 SM container (container).

The N1 SM container includes: PDU Session Modification Command.

PDU Session Modification Command include: cause value (Cause), protocol Configuration Option (PCO).

The PDU Session ID represents an existing PDU Session to be relocated.

The Cause indicates that the PDU session needs to be re-established to the same Data Network (DN).

The network-side required SMF reassignment indication indicates whether or not the reassignment of SMF is required.

The PDU session address life value is communicated to the UE upper layer in the PCO indicating how long the network is willing to maintain the PDU session.

The PCO includes a PDU Session address lifetime value (PDU Session ADDRESS LIFETIME value).

The SMF1 starts a PDU session release timer corresponding to the PDU session address lifetime value.

Step 303a, AMF1 sends a PDU session modification command message (i.e. a first message) to the terminal device, where the PDU session modification command message includes a first identifier and destination DNAI information (first transmission parameter).

AMF1 is the NF in the first network device.

Step 303b, the terminal device sends a PDU session modification command acknowledgement to AMF1 (PDU Session Modification Command ACK).

Step 303c, AMF1 forwards the N1 SM container (PDU Session Modification Command ACK) received from (R) AN1 to SMF1 by PDU session update SM context request (Nsmf _ PDUSession _ UpdateSMContext Request) service operation.

Step 303d, SMF1 feeds back PDU session update SM context response (Nsmf _ PDUSession _ UpdateSMContext Response).

In step 304a, the terminal device searches that the second message carrying the target DNAI information indicated by the first identifier is a PDU session establishment request message in the preset list, where the sending time of the second message is the sending time of the PDU session establishment request message, and in the PDU session establishment flow ((and UPF2 in the second distributed network node)), sends the PDU session establishment request message to AMF2 at the sending time of the PDU session establishment request message, where the PDU session establishment request message includes the target DNAI information.

And 305, the terminal equipment and the UPF2 perform uplink and downlink data transmission.

Step 306, the terminal device and UPF1 in the first distributed network node perform a release procedure of the PDU session.

In the application scenario of the distributed network architecture, in the PDU session establishment flow based on SSC mode2 or SSC mode3, the terminal equipment directly forwards the first transmission parameter, so that the identification requirement of the terminal equipment on the indication information of the Network Function (NF) in the core network can be reduced, the core network does not need to independently indicate the use time, the use condition and the like of the first transmission parameter to the terminal equipment, the transmission of the indication information between the terminal equipment and the core network is reduced, and the direct interaction between the cross-distributed network nodes is realized.

Receiving a first message sent by a base station, wherein the first message comprises a first identifier and DNN, S-NSSAI; the base station is the first network equipment;

according to the sending time of the registration request message, sending the registration request message carrying the DNN and the S-NSSAI to network equipment containing an access and mobility management function (AMF); the network device including the AMF is a second network device.

In the case of determining to trigger the PDU session establishment procedure, the data transmission method provided by the present invention will be described with reference to fig. 4 by taking the case that the calling terminal and the called terminal establish the PDU session based on the same Satellite (STA) and SMF calling terminal.

Fig. 4 is a flowchart of a data transmission method according to an embodiment of the present application. As shown in fig. 4, the method includes:

step 401, a calling terminal (UE 1) initiates a PDU session establishment procedure.

The PDU session establishment request message involved in the PDU session establishment procedure includes: parameters such as the general public user identity (Generic Public Subs cription Identifier, GPSI), DNN, nsai, 5G virtual network Group (Virtual Network Group, VN Group) message (info), if any, of the called terminal (UE 2).

Step 402, the SMF determines, according to the UE2 GPSI carried by the UE1, whether the called UE2 has a PDU session, and if not, the SMF invokes Nudm _sdm_get service operation to the UDM to retrieve the registration information of the UE 2. The SMF starts a session setup time timer of the called UE 2.

Step 403, the SMF calls N1N2 information (Namf _communication_n1n MESSAGETRANSFER) to the AMF.

The N1N2 information carries subscription information, a first identifier and a first transmission parameter of the UE 2.

In step 404a, the AMF determines that the called UE2 and the calling UE1 belong to the same SAT (i.e. the same S-UPF) according to the subscription information or the location information of the UE2 (if the UE2 is in IDLE state, a paging (Pagging) message needs to be sent to the UE2 to obtain the location information of the called UE 2), and performs downlink NAS transmission with the S-gNB (Downlink NAS Transport).

In the downlink NAS transport process, the carried cause indicates the UE2 to perform new PDU session establishment, and the PDU session establishment request message of the UE2 carries the same parameters as the PDU session establishment request message of the UE1 (for example, includes the first identifier and the first transmission parameters, for example, the first transmission parameters include DNN, S-NSSAI, parameters related to the 5G VN Group, and the like).

In step 404b, the base station (S-gNB) in SAT sends a registration Request Message (i.e. a first Message) to the UE2, where the registration Request Message carries the NAS Message and includes a first identifier, DNN, S-NSSAI, etc. (a first transmission parameter).

Step 405a, the UE2 searches the second message carrying DNN, S-NSSAI, etc. indicated by the first identifier in the preset list as a PDU session establishment request message, where the sending timing of the second message is the sending timing of the PDU session establishment request message, and in the PDU session establishment procedure, the UE2 sends the PDU session establishment request message to the AMF at the sending timing of the PDU session establishment request message, where the PDU session establishment request message includes DNN, S-NSSAI, etc., and at the same time, establishes a suitable matching forwarding rule at the S-UPF.

When the UE2 receives T2T data sent by the S-gNB, the T2T data is forwarded to the S-UPF, and the S-UPF detects that the destination address of the received data is the UE2, and forwards the data to the S-gNB and the data is forwarded to the UE2 through wireless carrying.

Step 406a, AMF forwards the PDU Session establishment completion response message received by S-gNB to UE2 to SMF through PDU Session update SM context request (Nsmf _ PDUSession _ UpdateSMContext Request) service operation, SMF completes Session establishment of called UE2, and saves PDU Session ID of UE2 in SMF.

Here the SMF of the AMF send message is the same SMF that triggers UE2 to initiate the PDU session establishment procedure.

Step 406b, the SMF sends a PDU session update SM context response (Nsmf _ PDUSession _ UpdateSMContext Response) to the AMF indicating that the setup is complete and the SMF timer is eliminated.

Step 407, the SMF invokes an N1N2message transmission (Namf _communication_n1n MESSAGETRANSFER) to the AMF, indicating that the PDU session establishment of UE2 is complete, and informing UE1.

Step 408, the AMF sends a PDU session resource setup request (PDU Session Resource setup request) message to the S-gNB, where the PDU session resource setup request message carries a DL NAS transport (e.g. PDU session establishment accept) message.

Step 409, the S-gNB sends a DL NAS transport request message (DL NAS transportRequest Message) to UE1, informing UE1 that the session establishment of UE2 is completed, and UE1 and UE2 may perform inter-satellite data communication.

In the case of determining to trigger the PDU session release procedure, taking the case that the calling terminal and the called terminal release the PDU session based on different Satellites (STAs) and SMF calling terminals as an example, the data transmission method provided by the present invention will be described with reference to fig. 5.

Fig. 5 is a flowchart of a data transmission method according to an embodiment of the present application. As shown in fig. 5, the method includes:

step 501, the calling terminal initiates a PDU session release procedure.

The PDU session release request message involved in the PDU session release procedure carries UE2GPSI.

Step 502, SMF1 invokes Nudm _sdm_get service operation to UDM to obtain PDU Session ID of UE2 from UDM according to UE2 GPSI.

Step 503, SMF1 calls N1N2 information (Namf _communication_n1n MESSAGETRANSFER) to AMF, carrying PDU Session ID, first identity, DNN and S-NSSAI of UE2, etc. (first transmission parameter).

Steps 504a, AMF and S-gNB2 perform downlink NAS transport (Downlink NAS Transport).

During downlink NAS transport, NAS messages are carried to inform UE2 of PDU session release, and also carry a first identifier, DNN, S-NSSAI, etc. (first transport parameters).

Step 504b, S-gNB2 sends a registration Request Message (i.e. a first Message) to UE2, where the registration Request Message carries the NAS Message and includes a first identifier, DNN, S-NSSAI, etc.

Optionally, the registration request message also includes other parameters related to the prior art, which will not be described in detail herein.

In step 505a, the UE2 searches the preset list that the second message carrying DNN and S-NSSAI indicated by the first identifier is a PDU session release request message, where the sending timing of the second message is the sending timing of the PDU session release request message, and in the PDU session release procedure, the UE2 sends the PDU session release request message to the AMF at the sending timing of the PDU session release request message, where the PDU session release request message includes the first transmission parameters (DNN and S-NSSAI).

Optionally, other steps may be further included in step 505a, which are not described in detail herein, and in particular, please refer to the prior art.

In the prior art, the core network can indicate the use time, the use condition and the like of the first transmission parameter of the terminal equipment through the indication information, so that the information transmission times between the terminal equipment and the core network are increased, the configuration and analysis of the use time and the use condition by the terminal equipment are increased, and the interaction between the terminal equipment and the core network is slowed down. In the application, the terminal equipment can directly forward the first transmission parameter based on the sending condition indicated by the first identifier, the first transmission parameter can be carried in the agreed message in a certain protocol, the information transmission times between the terminal equipment and the core network are reduced, and the configuration and analysis of the use time and the use condition by the terminal equipment are avoided because the terminal equipment directly forwards the first transmission parameter, so that the terminal equipment can interact with the core network timely and rapidly.

In some embodiments, in the case where the transmission opportunity is a preset opportunity and the message of the first transmission parameter is a preset message, the terminal device may negotiate with the network side device or define a separate message system, which is only used for transmitting the first transmission parameter and the transmission opportunity.

Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 6, the terminal device includes a memory 120, a transceiver 100, and a processor 110.

A memory 120 for storing a computer program.

A transceiver 100 for receiving and transmitting data under the control of the processor 110.

A processor 110 for reading the computer program in the memory 120 and performing the following operations:

Transceiver 100 for receiving and transmitting data under the control of processor 110.

In fig. 6, a bus architecture may comprise any number of interconnected buses and bridges, with one or more processors, represented by processor 110, and various circuits of memory, represented by memory 120, being chained together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 100 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The user interface 130 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 110 is responsible for managing the bus architecture and general processing, and the memory 120 may store data used by the processor 110 in performing operations.

Alternatively, the processor 110 may be a central processing unit (Central Processing Unit, CPU), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), or complex Programmable logic device (Complex Programmable Logic Device, CPLD), which may also employ a multi-core architecture.

The processor is operable to perform any of the methods provided by embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in a memory. The processor and the memory may also be physically separate.

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Optionally, the processor is specifically configured to:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

Optionally, the second cancelled transmission occasion includes one or more of:

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

Optionally, the second message further includes one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

Optionally, the first transmission parameter includes one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

Optionally, the processor is specifically configured to:

It should be noted that, the above terminal device provided by the embodiment of the present application can implement all the method steps implemented by the method embodiment executed by the terminal device, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

Fig. 7 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. The data transmission device is applied to the terminal equipment. As shown in fig. 7, the apparatus includes:

A receiving module 210, configured to receive a first message sent by a first network device, where the first message includes a first identifier and a first transmission parameter, and the first identifier is used to indicate a second message carrying the first transmission parameter and a sending opportunity of the second message;

and the sending module 220 is configured to send, when determining to trigger the target flow, a second message carrying the first transmission parameter to a second network device according to the sending timing of the second message.

Optionally, the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

Optionally, the sending module 220 is specifically configured to:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

Optionally, the second message further includes one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

Optionally, the first transmission parameter includes one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

Optionally, the receiving module 210 is specifically configured to:

The sending module 220 is specifically configured to:

Optionally, the receiving module 210 is specifically configured to:

The sending module 220 is specifically configured to:

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in the embodiment of the present application can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

In another aspect, an embodiment of the present application further provides a processor readable storage medium, where a computer program is stored, where the computer program is configured to cause the processor to perform the method provided in the foregoing embodiments, where the method includes: receiving a first message sent by first network equipment, wherein the first message comprises a first identifier and a first transmission parameter, and the first identifier is used for indicating a second message carrying the first transmission parameter and sending time of the second message; and under the condition that the triggering target flow is determined, sending a second message carrying the first transmission parameter to second network equipment according to the sending time of the second message.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile storage (NAND FLASH), solid State Disk (SSD)), etc.

In yet another aspect, an embodiment of the present application further provides a computer program product, including a computer program, where the computer program when executed by a processor implements the method provided in the foregoing embodiments, and includes: receiving a first message sent by first network equipment, wherein the first message comprises a first identifier and a first transmission parameter, and the first identifier is used for indicating a second message carrying the first transmission parameter and sending time of the second message; and under the condition that the triggering target flow is determined, sending a second message carrying the first transmission parameter to second network equipment according to the sending time of the second message.

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

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

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

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

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A data transmission method, applied to a terminal device, comprising:

2. The data transmission method according to claim 1, wherein the target flow is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

3. The method according to claim 1, wherein in the case of determining to trigger the target flow, sending the second message carrying the first transmission parameter to the second network device according to the sending timing of the second message, includes:

4. A data transmission method according to any one of claims 1 to 3, wherein the second message carrying the first transmission parameter comprises any one or more of:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

5. A data transmission method according to any one of claims 1 to 3, wherein the transmission opportunity of the second message comprises one or more of:

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

6. A data transmission method according to any one of claims 1 to 3, wherein the second message further comprises one or more of:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

7. A data transmission method according to any one of claims 1 to 3, wherein the first transmission parameters include one or more of:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

8. The method of claim 1, wherein receiving the first message sent by the first network device comprises:

9. The method of claim 1, wherein receiving the first message sent by the first network device comprises:

10. A terminal device, comprising: memory, transceiver, processor;

the memory is used for storing a computer program;

11. The terminal device according to claim 10, wherein the target procedure is any one of the following:

protocol data unit PDU session establishment procedure;

PDU conversation rebuilding flow;

PDU session release procedure.

12. The terminal device of claim 10, wherein the processor is specifically configured to:

13. The terminal device according to any of the claims 10 to 12, characterized in that the second message carrying the first transmission parameters comprises any one or more of the following:

A registration request message;

a PDU session establishment request message;

A PDU session modification command message;

A PDU session release request message;

Presetting a message;

a non-access stratum NAS message carried by the registration request message;

NAS message carried by PDU session establishment request message;

NAS message carried by PDU session modification command message;

the PDU session releases the NAS message carried by the command message.

14. The terminal device according to claims 10 to 12, characterized in that the transmission occasion of the second message comprises one or more of the following:

a transmission timing of the registration request message;

a transmission opportunity of a PDU session establishment request message;

A transmission opportunity of the PDU session modification command message;

a transmission opportunity of a PDU session release request message;

presetting a sending time;

the transmission opportunity of the PDU session release command message.

15. The terminal device according to claims 10 to 12, characterized in that the second message further comprises one or more of the following:

the effective duration of the first transmission parameter;

The time of validation of the first transmission parameter;

And the effective times of the first transmission parameters.

16. The terminal device according to any of the claims 10 to 12, characterized in that the first transmission parameters comprise one or more of the following:

target data network access identifier DNAI information;

a data network name DNN;

The single network slice selects the assistance information S-NSSAI.

17. The terminal device of claim 10, wherein the processor is specifically configured to:

18. The terminal device of claim 10, wherein the processor is specifically configured to:

19. A data transmission apparatus applied to a terminal device, comprising:

20. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program which, when executed by a processor, implements the data transmission method according to any one of claims 1 to 9.