Information Transmission Method, Apparatus and Communication Device

Abstract

Embodiments of the present disclosure relate to an information transmission method, apparatus, and communication device. The method includes: an access and mobility management function (AMF) of a core network receives a protocol data unit (PDU) session establishment request for a multimodal service sent by a user equipment (UE), where the PDU session establishment request carries multimodal service identification information.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, but is not limited to wireless communication technologies, and particularly relates to an information transmission method, apparatus, and communication device. Background Art

[0002] Intelligent interaction is an important application scenario for next-generation mobile communications, such as the sixth generation (6G, 6 th Generation). Intelligent interaction is the intelligent interaction generated between intelligent agents (including humans and intelligent devices). Most existing intelligent agent interactions are passive and rely on the input of requirements. For example, the voice and visual interactions between humans and smart homes, and the inputs are all single-modal. In the 6G era, multi-modal interaction will become the norm. Multi-modal interaction can be to send the inputs of multiple devices or multiple inputs of a single device to a centralized processing device or function, comprehensively process these multi-modal inputs, and finally obtain one or more outputs that meet the user's needs. Among them, multiple outputs can also be multi-output through multiple devices or multi-output through a single device.

[0003] Currently, the cellular mobile communication network includes an access network and a core network, and does not support the multi-modal interaction function. Summary of the Invention

[0004] In view of this, embodiments of the present disclosure provide an information transmission method, apparatus, and communication device.

[0005] According to a first aspect of the embodiments of the present disclosure, an information transmission method is provided, which is applied to the Access and Mobility Management Function (AMF) of the core network. The method includes:

[0006] Receiving a Protocol Data Unit (PDU) session establishment request for a multi-modal service sent by a User Equipment (UE), where the PDU session establishment request carries multi-modal service identification information.

[0007] According to a second aspect of the embodiments of the present disclosure, an information transmission method is provided, which is applied to the Session Management Function (SMF) of the core network. The method includes:

[0008] Receiving a context service request carrying multi-modal service identification information sent by the Access and Mobility Management Function AMF, where the context service request is used to request the establishment of a Protocol Data Unit PDU session for the multi-modal service.

[0009] According to a third aspect of the embodiments of the present disclosure, an information transmission method is provided, which is applied to a user equipment UE in a core network. The method includes:

[0010] Sending a protocol data unit PDU session establishment request for a multi-modal service to an access and mobility management function AMF, where the PDU session establishment request carries multi-modal service identification information.

[0011] According to a fourth aspect of the embodiments of the present disclosure, an information transmission device is provided, which is applied to an access and mobility management function AMF in a core network. The device includes: a first receiving module, where

[0012] The first receiving module is configured to receive a protocol data unit PDU session establishment request for a multi-modal service sent by a user equipment UE, where the PDU session establishment request carries multi-modal service identification information.

[0013] According to a fifth aspect of the embodiments of the present disclosure, an information transmission device is provided, which is applied to a session management function SMF in a core network. The device includes: a third receiving module, where

[0014] The third receiving module is configured to receive a context service request carrying multi-modal service identification information sent by an access and mobility management function AMF, where the context service request is used to request the establishment of a protocol data unit PDU session establishment for a multi-modal service.

[0015] According to a sixth aspect of the embodiments of the present disclosure, an information transmission device is provided, which is applied to a user equipment UE in a core network. The device includes: a sixth sending module, where

[0016] The sixth sending module is configured to send a protocol data unit PDU session establishment request for a multi-modal service to an access and mobility management function AMF, where the PDU session establishment request carries multi-modal service identification information.

[0017] According to a seventh aspect of the embodiments of the present disclosure, a communication device is provided, including a processor, a transceiver, a memory, and an executable program stored in the memory and capable of running on the processor. When the processor runs the executable program, it executes the steps of the information transmission method as described in the first aspect.

[0018] According to an eighth aspect of the embodiments of the present disclosure, a communication device is provided, including a processor, a transceiver, a memory, and an executable program stored in the memory and capable of running on the processor. When the processor runs the executable program, it executes the steps of the information transmission method as described in the second aspect.

[0019] According to a ninth aspect of the embodiments of the present disclosure, a communication device is provided, including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of running on the processor. When the processor runs the executable program, it executes the steps of the information transmission method described in the third aspect.

[0020] In the information transmission method, device, and communication device provided by the embodiments of the present disclosure, the access and mobility management function AMF of the core network receives a protocol data unit PDU session establishment request sent by a user equipment UE for a multi-modal service, where the PDU session establishment request carries multi-modal service identification information. In this way, the multi-modal service identification information is carried in the PDU session establishment request. On the one hand, it implicitly indicates the type of the PDU session to be established: the PDU session for the multi-modal service. On the other hand, the multi-modal service identification information can be used to indicate the type of the multi-modal service, etc., providing necessary information for the establishment of the PDU session and improving the information indication efficiency.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the embodiments of the present disclosure. Description of the Drawings

[0022] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the embodiments of the present invention.

[0023] Figure 1 is a flowchart of an information transmission method shown according to an exemplary embodiment;

[0024] Figure 2 is a flowchart of another information transmission method shown according to an exemplary embodiment;

[0025] Figure 3 is a flowchart of yet another information transmission method shown according to an exemplary embodiment;

[0026] Figure 4 is a flowchart of still another information transmission method shown according to an exemplary embodiment;

[0027] Figure 5 is a block diagram of an information transmission device shown according to an exemplary embodiment;

[0028] Figure 6 is a block diagram of another information transmission device shown according to an exemplary embodiment;

[0029] Figure 7 is a block diagram of yet another information transmission device shown according to an exemplary embodiment;

[0030] Figure 8 It is a block diagram of a device for information transmission shown according to an exemplary embodiment. Detailed implementation manners

[0031] Here, the exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present invention as detailed in the appended claims.

[0032] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms "a", "the", and "said" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0033] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0034] The execution entities involved in the embodiments of the present disclosure include, but are not limited to: access network devices such as base stations that support cellular mobile communication, and core network devices, etc.

[0035] The application scenario of the embodiments of the present disclosure is that in the related art, the cellular mobile communication network does not yet support establishing a PDU session applicable to multi-modal communication or services.

[0036] The information transmission method provided in this embodiment can be applied to the access and mobility management function AMF of the core network, such as Figure 1 As shown, the information transmission method may include:

[0037] Step 101: Receive a protocol data unit PDU session establishment request sent by a user equipment UE for a multi-modal service, where the PDU session establishment request carries multi-modal service identification information.

[0038] Here, the PDU session of the multimodal service can use multiple transport connections to transmit data of one modality respectively. The sources or forms of different data can be called a modality. The input modality can be distinguished based on the medium of the data. For example, voice, video, text, etc. can each be called a modality; the modality can also be distinguished based on different acquisition methods of the input data. For example, the data obtained through sensors, radar, infrared, accelerometers, etc. can each be called a modality of data. Multimodal services can include: multimodal communication and services, etc.

[0039] User equipment (UE), such as mobile phone terminals and Internet of Things terminals in the cellular mobile communication network, can send multimodal data obtained through image sensors, audio sensors, etc.

[0040] The UE can send a PDU session establishment request for the multimodal service to the core network, requesting to establish a PDU session for the multimodal service, and using different transport connections to transmit data of different modalities.

[0041] The UE can forward the PDU session establishment request to the core network through the access network (RAN). Here, the PDU session establishment request can be received by the AMF in the core network. The AMF is used to manage the access rights and handovers of the UE, etc.

[0042] The multimodal service identification information can be used to identify the service of the requested PDU session, and can also identify the type, name, etc. of the multimodal service corresponding to the requested PDU session. The core network can determine the configuration and resources required for the PDU session based on the multimodal service identification information, and then establish a PDU session suitable for the multimodal service. The PDU session establishment request can carry a PDU session identification number, a data network name (DNN) request type, etc. Among them, the request type can indicate whether the PDU session establishment request is a primary request or an existing session, etc.

[0043] In this way, the PDU session establishment request carries the multimodal service identification information. On the one hand, it implicitly indicates the type of the requested PDU session: the PDU session of the multimodal service. On the other hand, the multimodal service identification information can be used to indicate the type of the multimodal service, etc., providing necessary information for the establishment of the PDU session and improving the information indication efficiency.

[0044] In one embodiment, the receiving the PDU session establishment request sent by the UE for multimodal service transmission includes:

[0045] Receiving the PDU Session Establishment Request signaling sent by the UE carrying the multimodal service identification information.

[0046] The multi-modal service identification information of the PDU session establishment request can be added to the PDU Session Establishment Request signaling and sent by the UE to the AMF.

[0047] The reserved bit positions in the PDU Session Establishment Request signaling can be used to carry the multi-modal service identification information, so that the usage efficiency of the PDU Session Establishment Request signaling can be improved.

[0048] In one embodiment, the method further includes: in response to receiving the PDU session establishment request, selecting a session management function SMF associated with the multi-modal service;

[0049] Such as Figure 2 shown, the method further includes:

[0050] Step 102: Send a context service request carrying the multi-modal service identification information to the selected SMF.

[0051] The SMF is a functional unit based on the service architecture. The SMF is mainly responsible for interacting with the separated data plane, creating, updating, and deleting PDU sessions, and managing the session environment with the UPF.

[0052] The AMF can preferably select the SMF that serves the UE requesting to establish the PDU session and request the service of creating the PDU session context from the SMF. The AMF can carry the multi-modal service identification information in the context service request to indicate the service corresponding to the PDU session requested to be established to the SMF.

[0053] There are three main purposes for sending the context service request: establishing the connection between the AMF and the SMF regarding the UE session; transmitting the subscription data of the UE and triggering the entire session establishment process. The request can include: Subscription Permanent Identifier (SUPI), PDU Session ID, and PDU session request, etc., that is, the subscription data known by the AMF and the session establishment message from the UE to the SMF.

[0054] After receiving the context service request, the SMF can determine whether to establish a PDU session for the multi-modal service for the multi-modal service identification information.

[0055] In one embodiment, after receiving a PDU session establishment request carrying multi-modal service identification information, the AMF may further check whether it is possible to establish a PDU session for the multi-modal UE that supports the multi-modal service. In response to being able to establish a PDU session for the multi-modal UE that supports the multi-modal service, a context service request carrying the multi-modal service identification information is sent to the SMF.

[0056] In one embodiment, sending the context service request carrying the multi-modal service identification information to the selected SMF includes one of the following:

[0057] Sending an Nsmf_PDUSession_CreateSMContext Request signaling carrying the multi-modal service identification information to the selected SMF;

[0058] Sending an Nsmf_PDUSession_UpdateSMContext Request signaling carrying the multi-modal service identification information to the selected SMF.

[0059] If the AMF has no association with the SMF corresponding to the PDU session identification number provided by the UE, for example, when the request type indicates "initial request", the AMF sends an Nsmf_PDUSession_CreateSMContext Request signaling.

[0060] If the AMF has already been associated with the SMF corresponding to the PDU session identification number provided by the UE, for example, when the request type indicates "existing PDU session", the AMF sends an Nsmf_PDUSession_UpdateSMContext Request signaling.

[0061] The reserved bit positions in the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling can be used to carry the multi-modal service identification information. In this way, the usage efficiency of the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling can be improved.

[0062] In one embodiment, the method further includes one of the following:

[0063] In response to receiving the context service response carrying the multimodal service identification information sent by the selected SMF, determine that the selected SMF agrees to establish the PDU session;

[0064] In response to receiving the PDU session rejection instruction carrying the multimodal service identification information sent by the selected SMF, determine that the selected SMF does not agree to establish the PDU session.

[0065] If the SMF receives the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling, and the SMF can process the PDU session establishment request, the SMF creates a PDU session context and responds to the AMF by sending a context service response, indicating that the SMF agrees to establish the PDU session corresponding to the multimodal service identification information. Otherwise, the SMF indicates that the SMF does not agree to establish the PDU session corresponding to the multimodal service identification information through a rejection instruction.

[0066] In one embodiment, the determining that the selected SMF agrees to establish the PDU session in response to receiving the context service response carrying the multimodal service identification information sent by the selected SMF includes one of the following:

[0067] In response to receiving the Nsmf_PDUSession_CreateSMContext Response signaling carrying the multimodal service identification information sent by the selected SMF, determine that the selected SMF agrees to establish the PDU session;

[0068] In response to receiving the Nsmf_PDUSession_UpdateSMContext Response signaling carrying the multimodal service identification information sent by the selected SMF, determine that the selected SMF agrees to establish the PDU session.

[0069] For the Nsmf_PDUSession_CreateSMContext Request signaling sent by the AMF, if the SMF agrees to establish the PDU session corresponding to the multimodal service identification information, the SMF can respond with the Nsmf_PDUSession_CreateSMContext Response signaling carrying the multimodal service identification information.

[0070] For the Nsmf_PDUSession_UpdateSMContext Request signaling sent by the AMF, if the SMF agrees to establish a PDU session corresponding to the multi-modal service identification information, the SMF may use the Nsmf_PDUSession_UpdateSMContext Response carrying the multi-modal service identification information for response.

[0071] In one embodiment, determining that the selected SMF does not agree to establish the PDU session in response to receiving the PDU session rejection instruction sent by the selected SMF carrying the multi-modal service identification information includes:

[0072] Determining that the selected SMF does not agree to establish the PDU session in response to receiving the PDUSession Reject signaling sent by the selected SMF carrying the multi-modal service identification information.

[0073] For the Nsmf_PDUSession_CreateSMContext Request signaling or Nsmf_PDUSession_UpdateSMContext Request signaling sent by the AMF, if the SMF does not agree to establish a PDU session corresponding to the multi-modal service identification information, the SMF may use the PDU Session Reject signaling carrying the multi-modal service identification information for response.

[0074] In one embodiment, the method further includes:

[0075] Receiving the session management information of the PDU session sent by the selected SMF in response to successfully establishing the PDU session.

[0076] If it agrees to establish a PDU session corresponding to the multi-modal service identification information, the SMF will select a suitable user plane function (UPF, User Plane Function) to establish the PDU session

[0077] The UPF is a user plane network element. Based on the forwarding rules sent by the SMF, the UPF performs corresponding forwarding processing and serves as a gateway between the user plane and the data network (DN, Data Network).

[0078] After the SMF completes the PDU session establishment, it can forward session management (SM) related information of the PDU session to the UE and the base station through the AMF. Here, the session management information may include, but is not limited to, the PDU session identification number, N2 session management information, and N1 session management container, etc.

[0079] In one embodiment, the session management information of the PDU session sent by the selected SMF in response to the PDU session establishment includes:

[0080] The Namf_Communication_N1N2MessageTransfer signaling carrying the session management information of the PDU session sent by the selected SMF.

[0081] The reserved bit positions in the Namf_Communication_N1N2MessageTransfer signaling can be used to carry the multi-modal service identification information corresponding to the session management information of the PDU session. In this way, the utilization efficiency of the Namf_Communication_N1N2MessageTransfer signaling can be improved.

[0082] In one embodiment, the method further includes:

[0083] In response to receiving the session management information of the PDU session, sending the session management information of the PDU session to the access network; wherein, the session management information of the PDU session is used for the access network to send to the UE.

[0084] After the AMF receives the session management information of the PDU session corresponding to the multi-modal service identification information, it can send the session management information to the access network. The access network can obtain the N2 session management information for this PDU session. The access network can send the session management information to the UE.

[0085] In one embodiment, the step of sending the session management information of the PDU session to the access network in response to receiving the session management information of the PDU session includes:

[0086] Sending an N2 PDU SessionRequest signaling carrying the session management information of the PDU session to the access network.

[0087] The AMF can carry the session management information corresponding to the PDU session of the multi-modal service identification information by using reserved bit positions in the N2 PDU Session Request signaling. In this way, the usage efficiency of the N2 PDU Session Request signaling can be improved.

[0088] In one embodiment, the session management information of the PDU session is used for the access network to carry it in the RRCConnection Reconfiguration signaling and send it to the UE.

[0089] After receiving the session management information corresponding to the PDU session of the multi-modal service identification information, the access network can carry the session management information in the RRC Connection Reconfiguration signaling and send it to the UE. The UE parses the session management information from the RRCConnection Reconfiguration signaling and then performs the transmission of the multi-modal service.

[0090] In one embodiment, the multi-modal service identification information corresponding to different types of the multi-modal service is different.

[0091] Different types of multi-modal services have different requirements for the number of transmission connections needed and the PDU session. Therefore, different multi-modal service identification information can be used to identify different types of multi-modal services.

[0092] In this way, the PDU sessions established based on different multi-modal service identification information can meet the requirements of different multi-modal services.

[0093] In one embodiment, the multi-modal service identification information includes at least one of the following:

[0094] The name information corresponding to the type of the multi-modal service;

[0095] The identifier information corresponding to the type of the multi-modal service;

[0096] The enumerated value information corresponding to the type of the multi-modal service;

[0097] The character information or string information corresponding to the type of the multi-modal service.

[0098] Here, the type of multimodal service can be identified by the name corresponding to the type of multimodal service. Different predefined identifiers can also be used to indicate different types of multimodal services. Additionally, different sets of multimodal service types can be defined by predefining a list of different enumerated values, and different types of multimodal services can be indicated by the enumerated value class corresponding to the type of multimodal service. Different types of multimodal services can be indicated using different characters and / or strings.

[0099] In one embodiment, the correspondence between the type of multimodal service and the multimodal service identification information is configured by the core network or pre-agreed.

[0100] Here, the correspondence between the type of multimodal service and the multimodal service identification information can be pre-agreed through communication protocols, etc., or can also be configured by the core network.

[0101] The correspondence can be broadcast by the base station through system messages, etc. When the UE accesses the base station, it can determine the correspondence between the type of multimodal service and the multimodal service identification information by receiving system messages, etc. When the UE needs to establish a PDU session for a multimodal service, it can determine the multimodal service identification information based on the correspondence.

[0102] This embodiment provides an information transmission method that can be applied to the session management function SMF of the core network, such as Figure 3 As shown, the information transmission method may include:

[0103] Step 301: Receive a context service request carrying multimodal service identification information sent by the access and mobility management function AMF, where the context service request is used to request the establishment of a protocol data unit PDU session for a multimodal service.

[0104] Here, the PDU session of the multimodal service can use multiple transmission connections to transmit data of one modality respectively. Different data sources or forms can be referred to as a modality. Input modalities can be distinguished based on the medium of the data. For example, voice, video, text, etc. can each be referred to as a modality; modalities can also be distinguished based on different acquisition methods of the input data. For example, data obtained through sensors, radar, infrared, and accelerometers, etc. can each be referred to as a modality of data. Multimodal services can include: multimodal communication and services, etc.

[0105] Multimodal data obtained through image sensors, audio sensors, etc. can be sent by user equipment (UE, User Equipment) such as mobile phone terminals and Internet of Things terminals in a cellular mobile communication network.

[0106] The UE can send a PDU session establishment request for a multi-modal service to the core network, requesting to establish a PDU session for the multi-modal service, and transmitting data of different modalities using different transport connections.

[0107] The UE can forward the PDU session establishment request to the core network through the access network (RAN). Here, the PDU session establishment request can be received by the AMF in the core network. The AMF is used to manage the access rights and handovers of the UE, etc.

[0108] The multi-modal service identification information can be used to identify the service of the requested PDU session, and can also identify the type, name, etc. of the multi-modal service corresponding to the requested PDU session. The core network can determine the configuration and resources required for the PDU session based on the multi-modal service identification information, and then establish a PDU session suitable for the multi-modal service. The PDU session establishment request can carry a PDU session identification number, a data network name (DNN, Data Network Name) request type, etc. Among them, the request type can indicate whether the PDU session establishment request is a primary request or an existing session, etc.

[0109] In this way, the multi-modal service identification information is carried in the PDU session establishment request. On the one hand, it implicitly indicates the type of the PDU session to be established: the PDU session of the multi-modal service. On the other hand, the multi-modal service identification information can be used to indicate the type of the multi-modal service, etc., providing necessary information for the establishment of the PDU session and improving the information indication efficiency.

[0110] The SMF is a functional unit based on the service architecture. The SMF is mainly responsible for interacting with the separated data plane, creating, updating, and deleting PDU sessions, and managing the session environment with the UPF.

[0111] The AMF can preferably select the SMF that serves the UE requesting to establish the PDU session, and request the service of creating a PDU session context from the SMF. The AMF can carry the multi-modal service identification information in the context service request, used to indicate the service corresponding to the PDU session requested to be established to the SMF.

[0112] There are three main purposes for sending the context service request: establishing the connection between the AMF and the SMF regarding the UE session; transmitting the subscribed data of the UE and triggering the entire session establishment process. The request can include: the subscribed permanent identifier (SUPI, SUbscription Permanent Identifier), the PDU session identification number (PDU Session ID), and the PDU session request, etc., that is, the subscribed data known by the AMF and the session establishment message from the UE to the SMF.

[0113] After receiving the context service request, the SMF can determine whether to establish a PDU session for the multi-modal service based on the multi-modal service identification information.

[0114] In one embodiment, after receiving the PDU session establishment request carrying the multi-modal service identification information, the AMF can also check whether it can establish a PDU session for the multi-modal UE that supports the multi-modal service. In response to being able to establish a PDU session for the multi-modal UE that supports the multi-modal service, the AMF sends a context service request carrying the multi-modal service identification information to the SMF.

[0115] In one embodiment, receiving the context service request sent by the AMF and carrying the multi-modal service identification information includes one of the following:

[0116] Receiving the Nsmf_PDUSession_CreateSMContextRequest signaling carrying the multi-modal service identification information;

[0117] Receiving the Nsmf_PDUSession_UpdateSMContextRequest signaling carrying the multi-modal service identification information.

[0118] If the AMF has no association with the SMF corresponding to the PDU session identification number provided by the UE, for example, when the request type indicates an "initial request", the AMF sends the Nsmf_PDUSession_CreateSMContext Request signaling.

[0119] If the AMF has already been associated with the SMF corresponding to the PDU session identification number provided by the UE, for example, when the request type indicates an "existing PDU session", the AMF sends the Nsmf_PDUSession_UpdateSMContext Request signaling.

[0120] The reserved bit positions in the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling can be used to carry the multi-modal service identification information. In this way, the usage efficiency of the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling can be improved.

[0121] In one embodiment, the method further includes;

[0122] In response to agreeing to establish the PDU session, send a context service response carrying the multi-modal service identification information to the AMF;

[0123] In response to disagreeing to establish the PDU session, send a PDU session rejection instruction carrying the multi-modal service identification information to the AMF.

[0124] If the SMF receives the Nsmf_PDUSession_CreateSMContext Request signaling or the Nsmf_PDUSession_UpdateSMContext Request signaling, and the SMF can process the PDU session establishment request, the SMF creates a PDU session context and responds to the AMF by sending a context service response, indicating that the SMF agrees to establish the PDU session corresponding to the multi-modal service identification information. Otherwise, the SMF indicates that the SMF disagrees to establish the PDU session corresponding to the multi-modal service identification information through a rejection instruction.

[0125] In one embodiment, the sending the context service response carrying the multi-modal service identification information to the AMF includes one of the following:

[0126] Send the Nsmf_PDUSession_CreateSMContext Response signaling carrying the multi-modal service identification information to the AMF;

[0127] Send the Nsmf_PDUSession_UpdateSMContext Response signaling carrying the multi-modal service identification information to the AMF.

[0128] For the Nsmf_PDUSession_CreateSMContext Request signaling sent by the AMF, if the SMF agrees to establish the PDU session corresponding to the multi-modal service identification information, the SMF can respond with the Nsmf_PDUSession_CreateSMContext Response signaling carrying the multi-modal service identification information.

[0129] For the Nsmf_PDUSession_UpdateSMContext Request signaling sent by the AMF, if the SMF agrees to establish the PDU session corresponding to the multi-modal service identification information, the SMF can respond with the Nsmf_PDUSession_UpdateSMContext Response carrying the multi-modal service identification information.

[0130] In one embodiment, sending a PDU session rejection instruction carrying the multi-modal service identification information to the AMF includes:

[0131] Sending a PDU Session Reject signaling carrying the multi-modal service identification information to the AMF.

[0132] For the Nsmf_PDUSession_CreateSMContext Request signaling or Nsmf_PDUSession_UpdateSMContext Request signaling sent by the AMF, if the SMF does not agree to establish a PDU session corresponding to the multi-modal service identification information, the SMF can respond with a PDU Session Reject signaling carrying the multi-modal service identification information.

[0133] In one embodiment, the method further includes:

[0134] In response to agreeing to establish the PDU session, selecting a user plane function (UPF) associated with the multi-modal service.

[0135] If agreeing to establish a PDU session corresponding to the multi-modal service identification information, the SMF will select an appropriate user plane function (UPF, User Plane Function) to establish the PDU session.

[0136] The UPF is a user plane network element. Based on the forwarding rules sent by the SMF, the UPF performs corresponding forwarding processing and also serves as a gateway between the user plane and the data network (DN, Data Network).

[0137] In one embodiment, the method further includes:

[0138] In response to successfully establishing the PDU session, sending session management information of the PDU session to the AMF.

[0139] After the SMF completes the establishment of the PDU session, it can forward session management (SM, Eession Management) related information of the PDU session to the UE and the base station through the AMF. Here, the session management information may include, but is not limited to: PDU session identification number, N2 session management information (N2 SM information), and N1 session management container (N1 SM container), etc.

[0140] In one embodiment, sending the session management information of the PDU session to the AMF includes:

[0141] Send a Namf_Communication_N1N2MessageTransfer signaling carrying the session management information of the PDU session to the AMF.

[0142] The reserved bit positions in the Namf_Communication_N1N2MessageTransfer signaling can be used to carry the session management information of the PDU session corresponding to the multi-modal service identification information. In this way, the usage efficiency of the Namf_Communication_N1N2MessageTransfer signaling can be improved.

[0143] In one embodiment, the multi-modal service identification information corresponding to different types of the multi-modal services is different.

[0144] Different types of multi-modal services have different requirements for the number of transmission connections needed and the PDU session. Therefore, different multi-modal service identification information can be used to identify different types of multi-modal services.

[0145] In this way, the PDU sessions established based on different multi-modal service identification information can meet the requirements of different multi-modal services.

[0146] In one embodiment, the multi-modal service identification information includes at least one of the following:

[0147] The name information corresponding to the type of the multi-modal service;

[0148] The identifier information corresponding to the type of the multi-modal service;

[0149] The enumerated value information corresponding to the type of the multi-modal service;

[0150] The character information or string information corresponding to the type of the multi-modal service.

[0151] Here, the type of the multi-modal service can be identified by the name corresponding to the type of the multi-modal service. Different pre-defined identifiers can also be used to indicate different types of multi-modal services. Different sets of different types of multi-modal services can also be defined by pre-defining a list of different enumerated values, and different types of multi-modal services can be indicated by the enumerated value classes corresponding to the types of the multi-modal services. Different types of multi-modal services can be indicated by different characters and / or strings.

[0152] The information transmission method provided in this embodiment can be applied to a user equipment (UE) in a core network. As Figure 4 shown, the information transmission method may include:

[0153] Step 401: Send a Protocol Data Unit (PDU) session establishment request for a multi-modal service to the Access and Mobility Management Function (AMF), where the PDU session establishment request carries multi-modal service identification information.

[0154] Here, for the PDU session of a multi-modal service, multiple transmission connections can be used to transmit data of one modality respectively. The source or form of different data can be called a modality. The input modality can be distinguished based on the medium of the data. For example, voice, video, text, etc. can each be called a modality; the modality can also be distinguished based on different acquisition methods of the input data. For example, data obtained through sensors, radar, infrared, accelerometers, etc. can each be called a modality of data. Multi-modal services can include: multi-modal communication and services, etc.

[0155] User equipment (UE, User Equipment) such as mobile phone terminals and Internet of Things terminals in a cellular mobile communication network can send multi-modal data obtained through image sensors, audio sensors, etc.

[0156] The UE can send a PDU session establishment request for a multi-modal service to the core network, requesting to establish a PDU session for the multi-modal service and using different transmission connections to transmit data of different modalities.

[0157] The UE can forward the PDU session establishment request to the core network through the Radio Access Network (RAN). Here, the AMF in the core network can receive the PDU session establishment request. The AMF is used to manage the access rights and handovers of the UE, etc.

[0158] The multi-modal service identification information can be used to identify the service of the requested PDU session, and can also identify the type, name, etc. of the multi-modal service corresponding to the requested PDU session. The core network can determine the configuration and resources required for the PDU session based on the multi-modal service identification information, and then establish a PDU session suitable for the multi-modal service. The PDU session establishment request can carry a PDU session identification number, a Data Network Name (DNN) request type, etc. Among them, the request type can indicate whether the PDU session establishment request is a primary request or an existing session, etc.

[0159] In this way, the PDU session establishment request carries multi-modal service identification information. On the one hand, it implicitly indicates the type of the requested PDU session: the PDU session of the multi-modal service. On the other hand, the multi-modal service identification information can be used to indicate the type of the multi-modal service, etc., providing necessary information for the establishment of the PDU session and improving the information indication efficiency.

[0160] In one embodiment, the sending the PDU session establishment request for a multi-modal service to the AMF includes:

[0161] Send a PDU Session Establishment Request signaling carrying the multimodal service identification information.

[0162] The multimodal service identification information of the PDU session establishment request can be added to the PDU Session Establishment Request signaling and sent by the UE to the AMF.

[0163] The reserved bit positions in the PDU Session Establishment Request signaling can be used to carry the multimodal service identification information. In this way, the usage efficiency of the PDU Session Establishment Request signaling can be improved.

[0164] In one embodiment, the method further includes:

[0165] Receive the session management information of the PDU session sent by the access network, and perform the PDU session based on the session management information.

[0166] After receiving the session management information of the PDU session corresponding to the multimodal service identification information, the AMF can send the session management information to the access network. The access network can obtain the N2 session management information for this PDU session. The access network can send the session management information to the UE.

[0167] In one embodiment, the receiving the session management information of the PDU session sent by the access network includes:

[0168] Receive an RRC Connection Reconfiguration signaling sent by the access network and carrying the session management information of the PDU session.

[0169] After receiving the session management information of the PDU session corresponding to the multimodal service identification information, the access network can carry the session management information in the RRC Connection Reconfiguration signaling and send it to the UE. The UE can parse the session management information from the RRC Connection Reconfiguration signaling and then perform the transmission of the multimodal service.

[0170] In one embodiment, the multimodal service identification information corresponding to different types of the multimodal services is different.

[0171] Different types of multimodal services have different requirements for the number of transmission connections and PDU sessions needed. Therefore, different multimodal service identification information can be used to identify different types of multimodal services.

[0172] In this way, the PDU sessions established based on different multimodal service identification information can meet the requirements of different multimodal services.

[0173] In one embodiment, the multimodal service identification information includes at least one of the following:

[0174] The name information corresponding to the type of the multimodal service;

[0175] The identifier information corresponding to the type of the multimodal service;

[0176] The enumerated value information corresponding to the type of the multimodal service;

[0177] The character information or string information corresponding to the type of the multimodal service.

[0178] Here, the type of the multimodal service can be identified by the name corresponding to the type of the multimodal service. Different predefined identifiers can also be used to indicate different types of multimodal services. Additionally, the set of different types of multimodal services can be defined by predefining a list of different enumerated values, and different types of multimodal services can be indicated by the enumerated value classes corresponding to the types of multimodal services. Different types of multimodal services can be indicated by different characters and / or strings.

[0179] In one embodiment, the correspondence between the type of the multimodal service and the multimodal service identification information is configured by the core network or pre-agreed.

[0180] Here, the correspondence between the type of the multimodal service and the multimodal service identification information can be pre-agreed through communication protocols, etc., or can also be configured by the core network.

[0181] In one embodiment, the method further includes:

[0182] Receiving indication information of the correspondence between the type of the multimodal service and the multimodal service identification information broadcast by the base station.

[0183] The correspondence can be broadcast by the base station through system messages, etc. When the UE accesses the base station, it can determine the correspondence between the type of the multimodal service and the multimodal service identification information by receiving system messages, etc. When the UE needs to establish a PDU session for a multimodal service, it can determine the multimodal service identification information based on the correspondence.

[0184] The following provides a specific example in combination with any of the above embodiments:

[0185] This example proposes a method for establishing multimodal communication.

[0186] 1. When a multi-modal UE establishes a PDU session, it sends multi-modal communication or service information corresponding to the current PDU session establishment request to the core network.

[0187] 1. The multi-modal communication or service information corresponding to the current PDU session establishment request can be added to the PDUSession Establishment Request signaling and sent by the UE to the AMF.

[0188] 2. This information can be identified by the specific multi-modal communication or service name.

[0189] 3. This information can be represented by different integer ID values, different enumeration values, or characters / strings to correspond to different multi-modal communication / service types.

[0190] a) This correspondence relationship can be broadcast by the base station.

[0191] b) It can also be configured by the core network.

[0192] c) It can also define the default correspondence relationship.

[0193] 2. After receiving the PDU establishment request with the corresponding multi-modal communication or service information, the AMF will select a suitable SMF for this multi-modal terminal according to this information.

[0194] 1. After receiving the PDU establishment request with the corresponding multi-modal communication or service information, the AMF can also check whether it can establish a PDU session that supports this multi-modal communication or service for this multi-modal terminal.

[0195] 3. After selecting the SMF, the AMF sends the Nsmf_PDUSession_CreateSMContext Request signaling or Nsmf_PDUSession_UpdateSMContextRequest signaling carrying the corresponding multi-modal communication or service information to the SMF.

[0196] 4. After receiving the Nsmf_PDUSession_CreateSMContext Request signaling or Nsmf_PDUSession_UpdateSMContextRequest signaling carrying the corresponding multi-modal communication or service information sent by the AMF, the SMF decides whether it can establish a PDU session for this multi-modal communication or service.

[0197] 1. If the establishment is agreed, reply with the Nsmf_PDUSession_CreateSMContext Response signaling or Nsmf_PDUSession_UpdateSMContextResponse signaling carrying the multimodal communication or service information with consent.

[0198] 2. If the establishment is not agreed, reply with the PDUSession Reject (Cause) signaling carrying the multimodal communication or service information with disagreement.

[0199] 5. If the establishment is agreed, the SMF will select an appropriate UPF to establish the PDU session.

[0200] 6. After the successful establishment of the PDU session, the SMF sends the Namf_Communication_N1N2MessageTransfer signaling carrying the PDU session information established for the multimodal communication or service to the AMF.

[0201] 7. After receiving this signaling, the AMF sends the N2 PDU Session Request signaling carrying the PDU session information established for the multimodal communication or service to the RAN.

[0202] 8. After receiving the signaling sent by the AMF, the RAN instructs the UE to send the RRC Connection Reconfiguration signaling carrying the PDU session information established for the multimodal communication or service.

[0203] An embodiment of the present invention also provides an information transmission device, which is applied to the access and mobility management function AMF of the core network. Figure 5 It is a schematic structural diagram of the information transmission device 100 provided by the embodiment of the present invention; as Figure 5 shown, the device 100 includes: a first receiving module 110, wherein

[0204] The first receiving module 110 is configured to receive a protocol data unit PDU session establishment request sent by a user equipment UE for a multimodal service, wherein the PDU session establishment request carries multimodal service identification information.

[0205] In one embodiment, the first receiving module 110 includes:

[0206] A first receiving sub-module 111, configured to receive the PDUSession Establishment Request signaling sent by the UE and carrying the multimodal service identification information.

[0207] In one embodiment, the device 100 further includes:

[0208] A first selection module 120, configured to select a session management function SMF associated with the multimodal service in response to receiving the PDU session establishment request;

[0209] The device 100 further includes:

[0210] A first sending module 130, configured to send a context service request carrying the multimodal service identification information to the selected SMF.

[0211] In one embodiment, the first sending module 130 includes one of the following:

[0212] A first sending sub-module 131, configured to send an Nsmf_PDUSession_CreateSMContext Request signaling carrying the multimodal service identification information to the selected SMF;

[0213] A second sending sub-module 132, configured to send an Nsmf_PDUSession_UpdateSMContext Request signaling carrying the multimodal service identification information to the selected SMF.

[0214] In one embodiment, the device 100 further includes one of the following:

[0215] A first determination module 140, configured to determine that the selected SMF agrees to establish the PDU session in response to receiving a context service response carrying the multimodal service identification information sent by the selected SMF;

[0216] A second determination module 150, configured to determine that the selected SMF does not agree to establish the PDU session in response to receiving a PDU session rejection instruction carrying the multimodal service identification information sent by the selected SMF.

[0217] In one embodiment, the first determination module 140 includes one of the following:

[0218] A first determination sub-module 141, configured to determine that the selected SMF agrees to establish the PDU session in response to receiving an Nsmf_PDUSession_CreateSMContext Response signaling carrying the multimodal service identification information sent by the selected SMF;

[0219] The second determination sub-module 142 is configured to determine that the selected SMF agrees to establish the PDU session in response to receiving the Nsmf_PDUSession_UpdateSMContext Response signaling carrying the multi-modal service identification information sent by the selected SMF.

[0220] In one embodiment, the second determination module 150 includes:

[0221] The third determination sub-module 151 is configured to determine that the selected SMF does not agree to establish the PDU session in response to receiving the PDU Session Reject signaling carrying the multi-modal service identification information sent by the selected SMF.

[0222] In one embodiment, the apparatus 100 further includes:

[0223] The second receiving module 160 is configured to receive the session management information of the PDU session sent by the selected SMF in response to successfully establishing the PDU session.

[0224] In one embodiment, the second receiving module 160 includes:

[0225] The second receiving sub-module 161 is configured to receive the Namf_Communication_N1N2MessageTransfer signaling carrying the session management information of the PDU session sent by the selected SMF.

[0226] In one embodiment, the apparatus 100 further includes:

[0227] The second sending module 170 is configured to send the session management information of the PDU session to the access network in response to receiving the session management information of the PDU session; wherein, the session management information of the PDU session is used for the access network to send to the UE.

[0228] In one embodiment, the second sending module 170 includes:

[0229] The third sending sub-module 171 is configured to send the N2 PDU Session Request signaling carrying the session management information of the PDU session to the access network.

[0230] In one embodiment, the session management information of the PDU session is used for the access network to carry it in the RRCConnection Reconfiguration signaling and send it to the UE.

[0231] In one embodiment, the multimodal service identification information corresponding to different types of the multimodal services is different.

[0232] In one embodiment, the multimodal service identification information includes at least one of the following:

[0233] Name information corresponding to the type of the multimodal service;

[0234] Identifier information corresponding to the type of the multimodal service;

[0235] Enumeration value information corresponding to the type of the multimodal service;

[0236] Character information or string information corresponding to the type of the multimodal service.

[0237] In one embodiment, the correspondence between the type of the multimodal service and the multimodal service identification information is configured by the core network or pre-agreed.

[0238] An embodiment of the present invention further provides an information transmission device, which is applied to the session management function SMF of the core network. Figure 6 FIG. is a schematic structural diagram of the information transmission device 200 provided by an embodiment of the present invention; as Figure 6 shown, the device 200 includes: a third receiving module 210, wherein,

[0239] The third receiving module 210 is configured to receive a context service request carrying multimodal service identification information sent by an access and mobility management function AMF, wherein the context service request is used to request the establishment of a protocol data unit PDU session for the multimodal service.

[0240] In one embodiment, the third receiving module 210 includes one of the following:

[0241] A third receiving sub-module 211, configured to receive an Nsmf_PDUSession_CreateSMContext Request signaling carrying the multimodal service identification information;

[0242] A fourth receiving sub-module 212, configured to receive an Nsmf_PDUSession_UpdateSMContext Request signaling carrying the multimodal service identification information.

[0243] In one embodiment, the device 200 further includes;

[0244] A third sending module 220, configured to send a context service response carrying the multimodal service identification information to the AMF in response to agreeing to establish the PDU session.

[0245] A fourth sending module 230, configured to send a PDU session rejection instruction carrying the multimodal service identification information to the AMF in response to disagreeing to establish the PDU session.

[0246] In one embodiment, the third sending module 220 includes one of the following:

[0247] A fourth sending sub-module 221, configured to send an Nsmf_PDUSession_CreateSMContext Response signaling carrying the multimodal service identification information to the AMF;

[0248] A fifth sending sub-module 222, configured to send an Nsmf_PDUSession_UpdateSMContext Response signaling carrying the multimodal service identification information to the AMF.

[0249] In one embodiment, the fourth sending module 230 includes:

[0250] A sixth sending sub-module 231, configured to send a PDU Session Reject signaling carrying the multimodal service identification information to the AMF.

[0251] In one embodiment, the apparatus 200 further includes:

[0252] A second selection module 240, configured to select a user plane function UPF associated with the multimodal service in response to agreeing to establish the PDU session.

[0253] In one embodiment, the apparatus 200 further includes:

[0254] A fifth sending module 250, configured to send session management information of the PDU session to the AMF in response to successfully establishing the PDU session.

[0255] In one embodiment, the fifth sending module 250 includes:

[0256] A seventh sending sub-module 251, configured to send a Namf_Communication_N1N2MessageTransfer signaling carrying the session management information of the PDU session to the AMF.

[0257] In one embodiment, the multimodal service identification information corresponding to different types of the multimodal services is different.

[0258] In one embodiment, the multimodal service identification information includes at least one of the following:

[0259] The name information corresponding to the type of the multimodal service;

[0260] The identifier information corresponding to the type of the multimodal service;

[0261] The enumerated value information corresponding to the type of the multimodal service;

[0262] The character information or string information corresponding to the type of the multimodal service.

[0263] An embodiment of the present invention further provides an information transmission device, which is applied to a user equipment UE, Figure 7 It is a schematic structural diagram of the composition of the information transmission device 300 provided by the embodiment of the present invention; as Figure 7 shown, the device 300 includes: a sixth sending module 310, wherein,

[0264] The sixth sending module 310 is configured to send a protocol data unit PDU session establishment request for a multimodal service to an access and mobility management function AMF, wherein the PDU session establishment request carries multimodal service identification information.

[0265] In one embodiment, the sixth sending module 310 includes:

[0266] An eighth sending sub-module 311, configured to send a PDU SessionEstablishment Request signaling carrying the multimodal service identification information.

[0267] In one embodiment, the device 300 further includes:

[0268] A fourth receiving module 320, configured to receive the session management information of the PDU session sent by an access network;

[0269] A session module 330, configured to perform the PDU session based on the session management information.

[0270] In one embodiment, the fourth receiving module 320 includes:

[0271] A fifth receiving sub-module 321, configured to receive an RRC Connection Reconfiguration signaling carrying the session management information of the PDU session sent by the access network.

[0272] In one embodiment, the multimodal service identification information corresponding to different types of the multimodal service is different.

[0273] In one embodiment, the multimodal service identification information includes at least one of the following:

[0274] The name information corresponding to the type of the multimodal service;

[0275] The identifier information corresponding to the type of the multimodal service;

[0276] The enumerated value information corresponding to the type of the multimodal service;

[0277] The character information or string information corresponding to the type of the multimodal service.

[0278] In one embodiment, the correspondence between the type of the multimodal service and the multimodal service identification information is configured by the core network or pre-agreed.

[0279] In one embodiment, the apparatus 300 further includes:

[0280] A fifth receiving module 340, configured to receive the indication information of the correspondence between the type of the multimodal service and the multimodal service identification information broadcast by the base station.

[0281] In an exemplary embodiment, the first receiving module 110, the first selecting module 120, the first sending module 130, the first determining module 140, the second determining module 150, the second receiving module 160, the second sending module 170, the third receiving module 210, the third sending module 220, the fourth sending module 230, the second selecting module 240, the fifth sending module 250, the sixth sending module 310, the fourth receiving module 320, the session module 330, and the fifth receiving module 340, etc. may be implemented by one or more central processing units (CPUs, Central Processing Unit), graphics processing units (GPUs, Graphics Processing Unit), baseband processors (BP, baseband processor), application specific integrated circuits (ASICs, Application SpecificIntegrated Circuit), DSPs, programmable logic devices (PLDs, Programmable Logic Device), complex programmable logic devices (CPLDs, Complex Programmable Logic Device), field programmable gate arrays (FPGAs, Field-Programmable Gate Array), general purpose processors, controllers, microcontroller units (MCUs, MicroController Unit), microprocessors (Microprocessor), or other electronic components, and may also be implemented in combination with one or more radio frequency (RF, radio frequency) antennas for performing the foregoing method.

[0282] Figure 8 It is a block diagram of a device 3000 for information transmission shown according to an exemplary embodiment. For example, the device 3000 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0283] Referring to Figure 8 , the device 3000 may include one or more of the following components: a processing component 3002, a memory 3004, a power supply component 3006, a multimedia component 3008, an audio component 3010, an input / output (I / O) interface 3012, a sensor component 3014, and a communication component 3016.

[0284] The processing component 3002 generally controls the overall operation of the device 3000, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 3002 may include one or more processors 3020 to execute instructions to complete all or part of the steps of the above methods. In addition, the processing component 3002 may include one or more modules to facilitate the interaction between the processing component 3002 and other components. For example, the processing component 3002 may include a multimedia module to facilitate the interaction between the multimedia component 3008 and the processing component 3002.

[0285] The memory 3004 is configured to store various types of data to support the operation of the device 3000. Examples of such data include instructions for any application or method operating on the device 3000, contact data, phone book data, messages, pictures, videos, etc. The memory 3004 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0286] The communication component 3016 is configured to facilitate communication between the device 3000 and other devices in a wired or wireless manner. The device 3000 can access a communication standard-based wireless network, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 3016 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3016 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0287] In an exemplary embodiment, the device 3000 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0288] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as the memory 3004 including instructions, and the above instructions can be executed by the processor 3020 of the device 3000 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, Random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0289] Those skilled in the art will readily conceive of other embodiments of the embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the present invention, which follow the general principles of the embodiments of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the embodiments of the present disclosure. In addition, for those of ordinary skill in the technical field, without departing from the principles of the present disclosure, the steps or modules of each embodiment in the present disclosure can be replaced or combined, and these replacements and combinations should also be regarded as the protection scope of the present disclosure. The specification and embodiments are only regarded as exemplary, and the scope and spirit of the claimed embodiments of the present invention are pointed out by the following claims.

[0290] It should be understood that the embodiments of the present invention are not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the embodiments of the present invention is only limited by the appended claims.

Claims

1. An information transmission method, wherein, Access and Mobility Management Function (AMF) applied to the core network, the method comprising: Receiving a Protocol Data Unit (PDU) session establishment request for a multi-modal service sent by a User Equipment (UE), wherein the PDU session establishment request carries multi-modal service identification information; In response to receiving the PDU session establishment request, selecting a Session Management Function (SMF) associated with the multi-modal service; Sending a context service request carrying the multi-modal service identification information to the selected SMF.

2. The method according to claim 1, wherein, The receiving the PDU session establishment request sent by the UE for multi-modal service transmission includes: Receiving a PDU Session Establishment Request signaling sent by the UE and carrying the multi-modal service identification information.

3. The method according to claim 1, wherein, The sending the context service request carrying the multi-modal service identification information to the selected SMF includes one of the following: Sending an Nsmf_PDUSession_CreateSMContext Request signaling carrying the multi-modal service identification information to the selected SMF; Sending an Nsmf_PDUSession_UpdateSMContext Request signaling carrying the multi-modal service identification information to the selected SMF.

4. The method according to claim 1, wherein, The method further includes one of the following: In response to receiving a context service response sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF agrees to establish the PDU session; In response to receiving a PDU session rejection instruction sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF does not agree to establish the PDU session.

5. The method according to claim 4, wherein The in response to receiving the context service response sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF agrees to establish the PDU session includes one of the following: In response to receiving an Nsmf_PDUSession_CreateSMContext Response signaling sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF agrees to establish the PDU session; In response to receiving an Nsmf_PDUSession_UpdateSMContext Response signaling sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF agrees to establish the PDU session.

6. The method according to claim 4, wherein, The in response to receiving the PDU session rejection instruction sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF does not agree to establish the PDU session includes: In response to receiving a PDU SessionReject signaling sent by the selected SMF and carrying the multi-modal service identification information, determining that the selected SMF does not agree to establish the PDU session.

7. The method according to claim 1, wherein The method further includes: Receive the session management information of the PDU session sent by the selected SMF in response to the successful establishment of the PDU session.

8. The method according to claim 7, wherein The session management information of the PDU session sent by the selected SMF in response to the establishment of the PDU session includes: The Namf_Communication_N1N2MessageTransfer signaling sent by the selected SMF carrying the session management information of the PDU session.

9. The method according to claim 7, wherein, The method further includes: In response to receiving the session management information of the PDU session, send the session management information of the PDU session to the access network; wherein, the session management information of the PDU session is used for the access network to send to the UE.

10. The method according to claim 9, wherein The sending the session management information of the PDU session to the access network in response to receiving the session management information of the PDU session includes: Send an N2 PDU Session Request signaling carrying the session management information of the PDU session to the access network.

11. The method according to claim 9, wherein, The session management information of the PDU session is used for the access network to carry it in an RRC Connection Reconfiguration signaling and send it to the UE.

12. An information transmission method, wherein, Applied to the session management function SMF of the core network, the method includes: Receive a context service request carrying multi-modal service identification information sent by an access and mobility management function AMF, wherein the context service request is used to request the establishment of a protocol data unit PDU session for multi-modal services.

13. The method according to claim 12, wherein, The receiving the context service request carrying multi-modal service identification information sent by the AMF includes one of the following: Receive an Nsmf_PDUSession_CreateSMContext Request signaling carrying the multi-modal service identification information; Receive an Nsmf_PDUSession_UpdateSMContext Request signaling carrying the multi-modal service identification information.

14. The method according to claim 12, wherein, The method further includes; In response to agreeing to establish the PDU session, send a context service response carrying the multi-modal service identification information to the AMF; In response to disagreeing to establish the PDU session, send a PDU session rejection instruction carrying the multi-modal service identification information to the AMF.

15. The method according to claim 14, wherein, The sending the context service response carrying the multi-modal service identification information to the AMF includes one of the following: Send an Nsmf_PDUSession_CreateSMContext Response signaling carrying the multi-modal service identification information to the AMF; Send an Nsmf_PDUSession_UpdateSMContext Response signaling carrying the multi-modal service identification information to the AMF.

16. The method according to claim 14, wherein, The sending the PDU session rejection instruction carrying the multi-modal service identification information to the AMF includes: Send a PDU Session Reject signaling carrying the multi-modal service identification information to the AMF.

17. The method according to claim 12, wherein The method further includes: In response to agreeing to establish the PDU session, select a user plane function UPF associated with the multi-modal service.

18. The method according to claim 12, wherein The method further includes: In response to successfully establishing the PDU session, send session management information of the PDU session to the AMF.

19. The method according to claim 18, wherein The sending the session management information of the PDU session to the AMF includes: Send a Namf_Communication_N1N2MessageTransfer signaling carrying the session management information of the PDU session to the AMF.

20. A method for information transmission, wherein, Applied to a user equipment UE in the core network, the method includes: Send a protocol data unit PDU session establishment request for a multi-modal service to an access and mobility management function AMF, where the PDU session establishment request carries multi-modal service identification information; where the PDU session establishment request is used, after being received by the AMF, to select a session management function SMF associated with the multi-modal service and send a context service request carrying the multi-modal service identification information to the SMF.

21. The method according to claim 20, wherein, The sending the protocol data unit PDU session establishment request for a multi-modal service to an access and mobility management function AMF includes: Send a PDU Session Establishment Request signaling carrying the multi-modal service identification information.

22. The method according to claim 20, wherein, The method further includes: Receive the session management information of the PDU session sent by the access network and perform the PDU session based on the session management information.

23. The method according to claim 22, wherein, The receiving the session management information of the PDU session sent by the access network includes: Receive an RRC ConnectionReconfiguration signaling sent by the access network and carrying the session management information of the PDU session.

24. The method according to any one of claims 20 to 23, wherein, The method further includes: Receive indication information of the correspondence between the type of the multi-modal service broadcast by the base station and the multi-modal service identification information.

25. An information transmission device, wherein, Applied to an access and mobility management function AMF in the core network, the apparatus includes: a first receiving module, a first selection module, and a first sending module, where The first receiving module is configured to receive a protocol data unit PDU session establishment request for a multi-modal service sent by a user equipment UE, where the PDU session establishment request carries multi-modal service identification information; The first selection module is configured to, upon receiving the PDU session establishment request, select a session management function SMF associated with the multi-modal service; The first sending module is configured to send a context service request carrying the multi-modal service identification information to the selected SMF.

26. An information transmission device, wherein, Applied to a session management function SMF in the core network, the apparatus includes: a third receiving module, where The third receiving module is configured to receive a context service request carrying multi-modal service identification information sent by an access and mobility management function (AMF), where the context service request is used to request the establishment of a protocol data unit (PDU) session for the multi-modal service.

27. An information transmission device, wherein, A user equipment (UE) applied to a core network, the apparatus includes: a sixth sending module, where The sixth sending module is configured to send a PDU session establishment request for the multi-modal service to the AMF, where the PDU session establishment request carries the multi-modal service identification information; where, after the AMF receives the PDU session establishment request, it is used to select a session management function (SMF) associated with the multi-modal service and send a context service request carrying the multi-modal service identification information to the SMF.

28. The apparatus according to claim 27, wherein, The apparatus further includes: A fifth receiving module configured to receive indication information of the correspondence between the type of the multi-modal service and the multi-modal service identification information broadcast by a base station.

29. A communication device, including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor. When the processor runs the executable program, it executes the steps of the information transmission method according to any one of claims 1 to 11.

30. A communication device, including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor. When the processor runs the executable program, it executes the steps of the information transmission method according to any one of claims 12 to 19.

31. A communication device, including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor. When the processor runs the executable program, it executes the steps of the information transmission method according to any one of claims 20 to 24.

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