CN114650575B

CN114650575B - PDU session selection method, device, network function and storage medium

Info

Publication number: CN114650575B
Application number: CN202011552283.2A
Authority: CN
Inventors: 谢振华; 王文
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-24
Publication date: 2024-06-21
Anticipated expiration: 2040-12-24
Also published as: CN114650575A; WO2022127765A1

Abstract

The application discloses a PDU session selection method, a device, a network function and a storage medium, belonging to the communication field. The method is applied to a first network function, and comprises the following steps: receiving UE information; transmitting session information to the second network function, the session information comprising any one or a combination of the following: information of a target PDU session, wherein the target PDU session is obtained from a PDU session of the UE; information of a PDU session of the UE, wherein the information of the PDU session of the UE is used for the second network function to obtain a target PDU session; the UE information includes any one or a combination of the following: user identity of the UE, terminal identity of the UE. The embodiment of the application selects the target PDU session from the PDU sessions of the UE for associating the multicast service through the network function, avoids the defect of complicated realization of the UE function, realizes the network selection of the associated PDU session, simplifies the function of the UE and realizes the flexible selection of the associated PDU session.

Description

PDU session selection method, device, network function and storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to a PDU session selection method, a device, a network function and a storage medium.

Background

When a user joins a multicast service, if a serving base station has no multicast service supporting capability, multicast service data needs to be transmitted through a PDU session, and thus one PDU session needs to be selected.

The existing PDU session selection method is that the UE completes the selection and indicates to the network side, and the method can lead the UE to have the capability of selecting PDU session additionally, so that the function implementation of the UE is complicated.

Disclosure of Invention

The embodiment of the application aims to provide a PDU session selection method, a device, a network function and a storage medium, which can solve the problem that UE (user equipment) has excessively complicated function realization because the UE needs to have the capability of selecting PDU session additionally for PDU session selection.

In a first aspect, the present application provides a PDU session selection method, applied to a first network function, the method comprising:

receiving User Equipment (UE) information;

transmitting session information to the second network function, wherein the session information comprises any one or a combination of the following:

information of a target PDU session, wherein the target PDU session is obtained from a first PDU session;

information of a first PDU session, wherein the information of the first PDU session is used for a second network function to obtain a target PDU session;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

In a second aspect, the present application provides a PDU session selection method, applied to a second network function, the method comprising:

receiving information of a target PDU session from a first network function, wherein the target PDU session is obtained from the first PDU session after the first network function receives UE information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

In a third aspect, the present application provides a PDU session selection device, for application to a first network function, the device comprising:

the first receiving module is used for receiving User Equipment (UE) information;

A first sending module, configured to send session information to the second network function, where the session information includes any one or a combination of the following:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

In a fourth aspect, the present application provides a PDU session selection device, for use in a second network function, the device comprising:

A sixth receiving module, configured to receive information of a target PDU session from the first network function, where the target PDU session is obtained from the first PDU session after the first network function receives the UE information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

In a fifth aspect, the present application provides a network function comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.

In a sixth aspect, the present application provides a network function comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.

In a seventh aspect, the present application provides a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method as described in the first aspect, or performs the steps of the method as described in the second aspect.

In an eighth aspect, the present application provides a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a network function program or instruction to implement the steps of the method as described in the first aspect or to implement the steps of the method as described in the second aspect.

In the embodiment of the application, the target PDU session is selected from PDU sessions of the UE for associating the multicast service through the network function, so that the defect that the UE function is excessively complicated to realize due to the selection of the UE in the prior art is avoided, the network can select the associated PDU session to associate the MBS session, the function of the UE is simplified, and the flexible selection of the associated PDU session is realized.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic flow chart of a protocol data unit PDU session selection method according to an embodiment of the present application;

Fig. 3 is a second flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application;

Fig. 4 is a third flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application;

FIG. 5 is a flow chart illustrating a protocol data unit PDU session selection method according to an embodiment of the present application;

FIG. 6 is a flowchart of a PDU session selection method according to an embodiment of the present application;

FIG. 7 is a flowchart illustrating a protocol data unit PDU session selection method according to an embodiment of the present application;

Fig. 8 is a flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a PDU session selection device according to an embodiment of the present application;

Fig. 10 is a second schematic structural diagram of a PDU session selection device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a hardware structure of a network function according to an embodiment of the present application;

Fig. 13 is a second schematic diagram of a hardware structure of a network function according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate, such that embodiments of the application may be practiced otherwise than as specifically illustrated and described herein, and that the "first" and "second" distinguishing between objects generally being of the same type, and not necessarily limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. However, the following description describes a New Radio (NR) system for exemplary purposes, and NR terminology is used in much of the following description, although these techniques may also be applied to applications other than NR system applications, such as the 6 th Generation (6G) communication system.

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal device or a User Equipment (UE), and the terminal 11 may be a terminal-side device such as a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an ultra-Mobile Personal Computer (ultra-Mobile Personal Computer, UMPC), a Mobile internet device (Mobile INTERNET DEVICE, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), and the wearable device includes: a bracelet, earphone, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, where the base station may be called a node B, an evolved node B, an access Point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (Extended SERVICE SET, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access Point, a WiFi node, a transmission and reception Point (TRANSMITTING RECEIVING Point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that, in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

The PDU session selection method provided by the embodiment of the present application is described in detail below through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

Fig. 2 is a flow chart of a protocol data unit PDU session selection method according to an embodiment of the present application, which is applied to a first network function, and the method includes the following steps:

Step 200, receiving User Equipment (UE) information;

Step 210, sending session information to the second network function, wherein the session information comprises any one or a combination of the following:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

Alternatively, the first network function may be a functional module implemented by means of an entity device, and the first network function may be an AMF, or an SMF, or an MB-SMF; accordingly, the second network function may be an AMF, or an SMF, or an MB-SMF, wherein the second network function may be any device wherein the second network function is different from the first network function;

For example, when the first network function is an AMF, the second network function may be an SMF, or MB-SMF;

When the first network function is SMF, the second network function may be AMF, or MB-SMF;

when the first network function is MB-SMF, the second network function may be AMF, or SMF.

Optionally, the first network function may first receive UE information, and obtain a target PDU session in a PDU session of a UE corresponding to the UE information, for example, select the target PDU session for associating with an MBS session or for transmitting to other network functions;

Wherein the UE information corresponds to the UE;

Alternatively, the first network function may first receive the UE information of the user equipment, determine the UE identity, and may then obtain the target PDU session in the PDU session of the corresponding UE based on the UE information, such as selecting the target PDU session for associating the MBS session or for transmission to other network functions;

optionally, the first network function may further receive the indication information, and determine to send the session information to the second network function or not according to the indication information, or determine to perform selection and send the information of the target PDU session or not to perform selection and not send the information of the target PDU session if the target PDU session needs to be selected.

Optionally, the user equipment UE information or indication information is sent by the user equipment UE or by the second network function.

Optionally, after the first network function obtains the target PDU session, the information of the target PDU session may be sent to the second network function as session information, and after the second network function receives the information of the target PDU session and determines the target PDU session, subsequent processing, such as a PDU Session Modification procedure of initiating an associated PDU session, may be performed based on the target PDU session.

Alternatively, the first network function may directly send the PDU session information of the UE to the second network function as session information, and after the second network function receives the PDU session information of the UE, the second network function may obtain the target PDU session from the PDU session of the UE based on the UE information, for example, select the target PDU session.

Optionally, after the second network function receives the PDU session information of the UE, when the target PDU session is obtained from the PDU session of the UE based on the UE information, for example, when the target PDU session is selected, a manner of obtaining or selecting the target PDU session may be the same as a manner of obtaining the target PDU session from the PDU session of the UE or selecting the target PDU session by the first network function, which is not described herein.

Alternatively, the UE information may be information uniquely identifying the UE, including, but not limited to, a user identity and/or a terminal identity.

Optionally, the information of the first PDU session is included in context information of the UE.

Alternatively, the information of the first PDU session may be included in the context information of the UE.

Optionally, if the context information of the UE is stored in the first network function, the first network function may directly obtain the information of the first PDU session, that is, the information of the PDU session of the UE, from the context information of the UE;

Taking the MB-SMF as an example of the first network function, if the MB-SMF stores context information of the UE, that is, the first network function stores information of a first PDU session, that is, stores information of a PDU session of the UE, the target PDU session may be directly obtained from the PDU session of the UE, for example, the target PDU session may be directly selected from the PDU sessions of the UE.

Optionally, the method further comprises:

receiving context information of a UE from a third network function, wherein the context information comprises information of the first PDU session; or (b)

Information of the first PDU session is received from a third network function.

Optionally, if the context information of the UE is not stored in the first network function, the first network function may request to acquire the context information of the UE from the third network function storing the context information of the UE, and then obtain the PDU session information of the UE from the context information of the UE;

Optionally, if the context information of the UE is not stored in the first network function, the first network function may request, from a third network function storing the context information of the UE, to acquire information of the first PDU session stored by the third network function, that is, information of the PDU session of the UE;

Optionally, if the context information of the UE is not stored in the first network function, the first network function may request the context information of the UE from the third network function, and it may be understood that the third network function may transmit the context information of the UE to the first network function after obtaining the context information of the UE from other network functions;

Optionally, if the context information of the UE is not stored in the first network function, the first network function may request the PDU session information of the UE from the third network function, and it may be understood that the third network function may transmit the PDU session information of the UE to the first network function after obtaining the context information of the UE or the PDU session information from other network functions or the UE;

Taking the MB-SMF as an example of the first network function, if the MB-SMF does not store the context information of the UE, and the context information of the UE is stored in the AMF, the first network function MB-SMF may request the AMF for the PDU session information of the UE, and the AMF transmits the PDU session information of the UE to the MB-SMF; the MB-SMF may then obtain the target PDU session from among the PDU sessions of the UE, such as may be selected from among the PDU sessions of the UE.

Optionally, the method further comprises:

and receiving the information of the first PDU session from the UE.

Alternatively, the information of the PDU session of the UE may be provided directly by the UE to the first network function.

Alternatively, the first network function may directly receive information of the first PDU session from the UE, i.e. information of the PDU session of the UE.

Optionally, the UE may forward the information of the first PDU session through other network functions, for example, the UE sends to the other network functions, which send to the first network function again.

Optionally, before the session information is sent to the second network function, the method further includes:

Multicast traffic information is received.

Alternatively, the multicast service information may be received before the session information is sent to the second network function. It will be appreciated that the multicast service information is used to trigger the flow of selecting a target PDU call.

Optionally, the multicast service information includes any one or a combination of the following:

multicast broadcast service Session identification, MBS Session ID;

An internet protocol IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

Optionally, the multicast service information may include, but is not limited to, at least one of:

multicast broadcast service Session identification, MBS Session ID;

An internet protocol IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

Optionally, the first network function triggers a procedure of selecting a target PDU session from the PDU sessions of the UE, or sends the PDU session of the UE to the second network function, so that the second network function selects the target PDU session from the PDU sessions of the UE.

Optionally, the PDU session of the UE includes: all PDU sessions of the UE, or part of PDU sessions of the UE.

Alternatively, the PDU session of the UE may include all PDU sessions of the UE, i.e. the target PDU session may be selected based on all PDU sessions of the UE.

Alternatively, the PDU session of the UE may include a partial PDU session of the UE, i.e., the target PDU session may be selected based on the partial PDU session of the UE.

Optionally, the information of the PDU Session includes a PDU Session ID and/or a Session management SM context ID.

Optionally, the information of the PDU Session of the UE may include a PDU Session identification PDU Session ID for determining a corresponding PDU Session;

Optionally, the information of the PDU session of the UE may include a session management SM context identifier for determining a corresponding PDU session;

Alternatively, the information of the PDU Session of the UE may include a combination of a PDU Session identification PDU Session ID and a Session management SM context identification for determining the corresponding PDU Session.

Optionally, the PDU session information further includes any one or a combination of the following:

the session management function SMF transmits the address;

SMF identification;

IP address of SMF;

port number of SMF.

Optionally, the information of the PDU session of the UE may further include at least one of:

the session management function SMF transmits the address;

SMF identification;

IP address of SMF;

port number of SMF.

Optionally, any of the above information or any combination may further assist in determining the corresponding PDU Session based on the PDU Session ID and/or SM context identification.

Optionally, obtaining the target PDU session from the first PDU session includes:

And obtaining the target PDU session based on a preset rule.

Alternatively, the selection rule of the target PDU session may be defined before each target PDU session selection, or after each preset selection period, and then the target PDU session may be obtained based on the pre-defined selection rule.

Alternatively, the selection rules for the target PDU session may be protocol-specified, and then the target PDU session is obtained based on the protocol-specified selection rules.

Optionally, obtaining a target PDU session from the first PDU session, including any one or combination of:

Acquiring a target PDU session based on a multicast service function support condition of an SMF serving the first PDU session;

obtaining a target PDU session based on a transmission distance or time delay between an SMF serving the first PDU session and an MB-SMF serving the multicast service;

And obtaining a target PDU session based on the communication condition of the SMF serving the first PDU session and the MB-SMF serving the multicast service.

Alternatively, the target PDU session may be selected directly based on multicast service function support of the SMF serving the first PDU session; for example, selecting a PDU session corresponding to SMF supporting multicast service function as a target PDU session;

alternatively, the target PDU session may be selected directly based on a transmission distance or delay between the SMF serving the first PDU session and the MB-SMF serving the multicast service;

Alternatively, the target PDU session may be obtained directly based on the communication situation of the SMF serving the first PDU session and the MB-SMF serving the multicast service; such as selecting a PDU session corresponding to the MB-SMF reachable (reachable) as the target PDU session.

Fig. 3 is a second flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, applied to a second network function, the method comprising the steps of:

Step 300, receiving information of a target PDU session from a first network function, wherein the target PDU session is obtained from the first PDU session after the first network function receives UE information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

Alternatively, the second network function may be a functional module implemented by means of an entity device, and the second network function may be an AMF, or an SMF, or an MB-SMF; accordingly, the first network function may be an AMF, or an SMF, or an MB-SMF, wherein the first network function may be any device in which the second network function is different;

for example, when the second network function is an AMF, the first network function may be an SMF, or MB-SMF;

when the second network function is SMF, the first network function may be AMF, or MB-SMF;

when the second network function is MB-SMF, the first network function may be AMF, or SMF.

Optionally, the second network function may receive session information sent by the first network function, where the session information may be a target PDU session, and it may be understood that the first network function may obtain, after receiving UE information, a target PDU session in a PDU session of the UE, for example, select the target PDU session, and then transmit the target PDU session to the second network function for associating the MBS session or for transmitting the target PDU session to other network functions;

Optionally, the second network function may send indication information to the first network function, where the first network function determines to send the session information to the second network function or not according to the indication information, or determines to perform selection and send information of the target PDU session or not to perform selection and not send information of the target PDU session if the target PDU session needs to be selected.

Optionally, the method further comprises:

And sending a selection failure indication, a selection success indication or information of the target PDU session to the first network function.

Optionally, after receiving the session information, the second network function may return a selection failure indication, or a selection success indication, or information of the target PDU session to the first network function.

Optionally, if the session information is the information of the target PDU session, the second network function may determine whether the target PDU session selected by the first network function is a target PDU session required by the second network function, or the second network function may determine whether the target PDU session selected by the first network function may be used by the second network function to associate the MBS session, if so, the second network function may return a selection success indication, otherwise, may return a selection failure indication.

Optionally, if the session information is information of the first PDU session, that is, PDU session information of the UE, the target PDU session may be acquired from the PDU session of the UE based on the UE information, and then the acquired information of the target PDU session may be returned to the first network function, where the first network function may be used to associate the MBS session or be used for transmitting to other network functions after receiving the information.

Fig. 4 is a third flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, where the method includes the following steps:

Step 401: the UE sends request information;

Optionally, the UE may request to the core network to join/leave the MBS Session, such as sending PDU Session Establishment/Modification messages of the NAS, and may also carry the PDU Session ID and MBS Session ID.

Step 402: AMF sends PDU session information of UE to SMF;

alternatively, the AMF may function as the first network;

Alternatively, the MB-SMF may function as a second network;

optionally, the AMF may send the MBS Session ID, the SM Context identifier, and the user indication and/or the terminal ID to the SMF of the PDU Session corresponding to the service PDU Session ID, e.g. invoke Nsmf _ PDUSession _update operation, carrying the MBS Session ID, SM Context ID and UE ID.

Step 403: the SMF transmits PDU session information and UE information of the UE to the MB-SMF;

alternatively, the SMF may send the MBS Session ID and the UE ID to the MB-SMF.

Step 404, requesting and acquiring information of all or part of PDU session of UE from UDM;

Optionally, in the case where the MB-SMF does not obtain PDU Session related information of the UE, the MB-SMF requests all or part of the PDU Session related information of the UE from the UDM, such as invoking Nudm _sdm_get operation, carrying the UE ID, and the UDM returns all or part of the PDU Session related information corresponding to the UE ID, such as SMF information (SMF ID and/or SMF IP ADDRESS and/or SMF transport address —ip address and port number), PDU Session ID, and/or SM context identification.

Step 405, the MB-SMF obtains a target PDU session from PDU sessions of the UE;

alternatively, the MB-SMF may select a PDU session associated with the MBs session based on PDU session related information of the UE, such as whether the SMF serving the PDU session supports multicast services, whether a transmission distance from the MB-SMF is short or a transmission time is short, whether it is reachable with the MB-SMF, and so on.

Step 406: the MB-SMF transmits the information of the target PDU session to the SMF;

Optionally, the MB-SMF sends the PDU session identity and/or SM context identity, and the MBS session identity to the SMF serving the associated PDU session.

Step 407: the MB-SMF transmits the information of the target PDU session to the base station;

Alternatively, the MB-SMF may send the associated PDU session identity and the associated MBS session identity to the base station gNB through the AMF.

Step 408: the SMF initiates PDU Session Modification procedure associated with the PDU session.

Alternatively, the SMF may initiate PDU Session Modification procedures associated with the PDU session.

Fig. 5 is a flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, where the method includes the following steps:

Step 501: the UE sends request information and can carry indication information;

Optionally, the UE may request to the core network to Join/Leave the MBS Session, such as sending a PDU Session Establishment/Modification message or an MBS Session Join/Leave message of the NAS, carrying an MBS Session ID, and may carry a PDU Session ID.

Step 502: AMF selects target PDU session;

alternatively, the AMF may function as the first network;

alternatively, the AMF may select a target PDU session associated with the MBS session based on information of the PDU session of the UE, e.g., whether the SMF serving the PDU session supports multicast service, whether a transmission distance from the MB-SMF is short or a transmission time is short, whether the MB-SMF is reachable, etc.

Optionally, the AMF may decide whether to select a target PDU session associated with the MBS session and/or whether to transmit information of the target PDU session according to the indication information.

Step 503: AMF sends target PDU session information to SMF;

Alternatively, the SMF may function as a second network;

Optionally, the AMF may send the MBS Session ID, the SM Context identifier, and the user indication and/or the terminal ID to the SMF of the PDU Session corresponding to the service management PDU Session ID, e.g. call Nsmf _ PDUSession _update operation, carrying the MBS Session ID, SM Context ID and UE ID.

Step 504: the SMF transmits the information of the target PDU session to the MB-SMF;

alternatively, the SMF may send the MBS Session ID and the associated PDU Session ID to the MB-SMF.

Step 505: the MB-SMF transmits the information of the target PDU session to the base station;

Step 506: the SMF initiates PDU Session Modification procedure associated with the PDU session.

Fig. 6 is a flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, where the method includes the following steps:

step 601: the UE sends request information;

Step 602: AMF sends PDU session information of UE;

alternatively, the AMF may function as the first network;

Alternatively, the MB-SMF may function as a second network;

Step 603: the SMF requests the UDM to acquire the information of all or part of PDU session of the UE;

Optionally, the SMF requests all or part of PDU Session related information of the UE from the UDM, such as invoking Nudm _sdm_get operation, carrying the UE ID, and the UDM returns all or part of PDU Session related information corresponding to the UE ID, such as SMF information (SMF ID and/or SMF IP ADDRESS and/or SMF transport address —ip address and port number), PDU Session ID, and/or SM context identification.

Step 604: the SMF transmits PDU session information of the UE to the MB-SMF;

alternatively, the SMF may send information of the PDU session of the UE, including related information of all or part of the PDU session of the UE, to the MB-SMF.

Step 605, MB-SMF obtains target PDU session from PDU session of UE;

Step 606: the MB-SMF transmits the information of the target PDU session to the SMF;

Step 607: the MB-SMF transmits the information of the target PDU session to the base station;

Step 608: the SMF initiates PDU Session Modification procedure associated with the PDU session.

Fig. 7 is a flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, where the method includes the following steps:

step 701: the UE sends request information and can carry indication information;

Optionally, the UE may request to the core network to Join/Leave the MBS Session, such as sending an MBS Session Join/Leave message of NAS, carrying an MBS Session ID, and may also carry one or more PDU Session IDs.

Step 702: AMF selects target PDU session;

alternatively, the AMF may function as the first network;

Alternatively, the AMF may select a target PDU Session associated with the MBS Session based on information of the PDU Session of the UE, such as a PDU Session ID, such as whether the SMF serving the PDU Session supports multicast service, whether a transmission distance or transmission time with the MB-SMF serving the multicast service is short, whether it is reachable with the MB-SMF, and so on.

Step 703: AMF sends the information of the target PDU session to MB-SMF;

Alternatively, the MB-SMF may function as a second network;

alternatively, the AMF may send information of the selected target PDU Session to the MB-SMF, such as SMF information (SMF ID and/or SMF IP ADDRESS and/or SMF transport address —ip address and port number) of the target PDU Session, PDU Session ID, SM context identification.

Optionally, the method may further comprise the steps of:

Step 704: AMF sends PDU session information of UE to MB-SMF;

Optionally, the AMF may also send information of the PDU Session of the UE to the MB-SMF, and may include related information of all or part of the PDU Session of the UE, such as SMF information (SMF ID and/or SMF IP ADDRESS and/or SMF transport address —ip address and port number), PDU Session ID, SM context identification.

Alternatively, the AMF may decide whether to transmit the PDU session information of the UE according to the indication information.

Step 705: the MB-SMF selects a target PDU session;

Alternatively, the MB-SMF may select a target PDU session associated with the MBS session based on the PDU session information of the UE, such as selecting the target PDU session based on whether the SMF serving the PDU session supports multicast traffic, whether the transmission distance from the MB-SMF is short or the transmission time is short, whether the MB-SMF is reachable, etc.

Optionally, the method may further comprise the steps of:

step 706: the MB-SMF returns indication information;

Alternatively, the MB-SMF may indicate failure to the AMF when the multicast service does not need to associate the PDU Session, and may indicate PDU Session information to the AMF when the multicast service needs to associate the PDU Session, and may also indicate the MBs Session ID.

Optionally, the method may further comprise the steps of:

step 707: the MB-SMF transmits the information of the target PDU session to the SMF;

Optionally, the method may further comprise the steps of:

step 708: the MB-SMF transmits the information of the target PDU session to the base station;

Optionally, the method may further comprise the steps of:

step 709: the SMF initiates PDU Session Modification procedure associated with the PDU session.

It should be noted that, in the PDU session selection method provided in the embodiment of the present application, the execution body may be a PDU session selection device, or a control module in the PDU session selection device for executing the PDU session selection method. In the embodiment of the present application, a PDU session selection device executes a PDU session selection method as an example, which describes the PDU session selection device provided in the embodiment of the present application.

Fig. 8 is a flowchart of a protocol data unit PDU session selection method according to an embodiment of the present application, where the method includes the following steps:

Step 801: the MB-SMF sends request information for the UE and can carry indication information;

Step 802: AMF selects target PDU session;

alternatively, the AMF may function as the first network;

Step 703: AMF sends the information of the target PDU session to MB-SMF;

Alternatively, the MB-SMF may function as a second network;

Step 804: the MB-SMF transmits the information of the target PDU session to the SMF;

Step 805: the SMF initiates PDU Session Modification procedure associated with the PDU session.

Fig. 9 is a schematic structural diagram of a PDU session selection device according to an embodiment of the present application, where the device is applied to a first network function, and the device includes: a first receiving module 910 and a first transmitting module 920; wherein:

The first receiving module 910 is configured to receive UE information;

The first sending module 920 is configured to send session information to the second network function based on the received UE information, where the session information includes any one or a combination of the following:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

User identification, terminal identification.

Optionally, the PDU session selection device may send session information to the second network function through the first sending module 820 after receiving the UE information through the first receiving module 810, where the session information includes any one or a combination of the following:

Information of a first PDU session, wherein the information of the first PDU session is used for a second network function to obtain a target PDU session.

It should be noted that, the device provided in this embodiment of the present invention can implement all the method steps implemented in the PDU session selection method embodiment, and can 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.

Optionally, the apparatus further comprises:

A second receiving module, configured to receive context information from a UE of a third network function, where the context information includes information of the first PDU session; or (b)

And a third receiving module, configured to receive information of the first PDU session from a third network function.

Optionally, the apparatus further comprises:

And a fourth receiving module, configured to receive the information of the first PDU session from the UE.

Optionally, the apparatus further comprises:

And a fifth receiving module, configured to receive multicast service information before sending the session information to the second network function.

MBS Session ID；

An IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

Optionally, the apparatus further comprises:

a seventh receiving module, configured to receive indication information before sending session information to a second network function, where the indication information is used by the first sending module 920 to send the session information to the second network function based on the indication information.

Optionally, the information of the PDU Session includes a PDU Session ID and/or an SM context identification.

SMF transmission address;

SMF identification;

IP address of SMF;

port number of SMF.

Optionally, the first sending module is further configured to:

and selecting the target PDU session based on a preset rule.

Optionally, the first sending module is further configured to:

The PDU session selection in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in particular.

The PDU session selection in the embodiments of the present application may be a device with an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, and the embodiment of the present application is not limited specifically.

The PDU session selection provided by the embodiment of the application can realize the method embodiments of figures 2 to 7

Fig. 10 is a second schematic structural diagram of a PDU session selection device according to an embodiment of the present application, which is applied to a first network function, and the device includes: a sixth receiving module 1010; wherein:

The sixth receiving module 1010 is configured to receive information of a target PDU session from the first network function, where the target PDU session is obtained from the first PDU session after the first network function receives the UE information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

Alternatively, the PDU session selection device may receive information of a target PDU session from the first network function through the sixth receiving module 1010, wherein the target PDU session is obtained from the first PDU session by the first network function based on the UE information;

Optionally, the apparatus further comprises:

And the second sending module is used for sending a selection failure indication, a selection success indication or information of the target PDU session to the first network function.

Optionally, the apparatus further comprises:

and the third sending module is used for sending indication information to the first network function, wherein the indication information is used for the first network function to send the information of the target PDU session to the second network function according to the indication information.

The PDU session selection provided by the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 2 to fig. 7, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Optionally, fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application, as shown in fig. 11, where the communication device 1100 includes a processor 1101, a memory 1102, and a program or an instruction stored in the memory 1102 and capable of running on the processor 1101, and when the communication device 1100 is a network side device, the program or the instruction is executed by the processor 1101 to implement each process of the PDU session selection method embodiment, and the same technical effects can be achieved, so that repetition is avoided and detailed description is omitted herein.

Fig. 12 is a schematic diagram of a hardware structure of a network function according to an embodiment of the present application.

As shown in fig. 12, the network function 1200 includes: an antenna 1201, a radio frequency device 1202, a baseband device 1203. The antenna 1201 is connected to a radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information via the antenna 1201 and transmits the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes information to be transmitted, and transmits the processed information to the radio frequency device 1202, and the radio frequency device 1202 processes the received information and transmits the processed information through the antenna 1201.

The above-described band processing means may be located in the baseband means 1203, and the method of performing the network functions in the above embodiments may be implemented in the baseband means 1203, the baseband means 1203 comprising a processor 1204 and a memory 1205.

The baseband device 1203 may, for example, comprise at least one baseband board on which a plurality of chips are disposed, as shown in fig. 12, where one chip, for example, a processor 1204, is connected to the memory 1205 to invoke a program in the memory 1205 to perform the network function operations shown in the above method embodiment.

The baseband apparatus 1203 may also include a network interface 1206 for interacting with the radio frequency apparatus 1202, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the network functions of the embodiment of the present application further include: instructions or programs stored in the memory 1205 and executable on the processor 1204, the processor 1204 invokes the instructions or programs in the memory 1205 to perform the method performed by the modules shown in fig. 9 and achieve the same technical effects, and are not described herein in detail for the sake of avoiding repetition.

Wherein the processor 1204 is configured to:

receiving User Equipment (UE) information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

Optionally, the processor 1204 is further configured to:

Information of the first PDU session is received from a third network function.

Optionally, the processor 1204 is further configured to:

and receiving the information of the first PDU session from the UE.

Optionally, before the session information is sent to the second network function, the processor 1204 is further configured to:

Multicast traffic information is received.

multicast broadcast service Session identification, MBS Session ID;

An internet protocol IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

Optionally, the processor 1204 is further configured to:

before sending session information to a second network function, receiving indication information, wherein the indication information is used for the first network function to send the session information to the second network function according to the indication information.

Optionally, the UE information or the indication information is from the UE or the second network function.

the session management function SMF transmits the address;

SMF identification;

IP address of SMF;

port number of SMF.

And obtaining the target PDU session based on a preset rule.

As shown in fig. 13, the network function 1300 includes: an antenna 1301, a radio frequency device 1302, a baseband device 1303. The antenna 1301 is connected to a radio frequency device 1302. In the uplink direction, the radio frequency device 1302 receives information via the antenna 1301, and transmits the received information to the baseband device 1303 for processing. In the downlink direction, the baseband device 1303 processes information to be transmitted, and transmits the processed information to the radio frequency device 1302, and the radio frequency device 1302 processes the received information and transmits the processed information through the antenna 1301.

The above-described band processing means may be located in the baseband apparatus 1303, and the method of performing the network functions in the above embodiment may be implemented in the baseband apparatus 1303, where the baseband apparatus 1303 includes a processor 1304 and a memory 1305.

The baseband device 1303 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 13, where one chip, for example, a processor 1304, is connected to the memory 1305 to call a program in the memory 1305 to perform the network function operation shown in the above method embodiment.

The baseband device 1303 may further include a network interface 1306, such as a common public radio interface (common public radio interface, abbreviated CPRI), for interacting with the radio frequency device 1302.

Specifically, the network functions of the embodiment of the present application further include: instructions or programs stored in the memory 1305 and executable on the processor 1304, the processor 1304 invokes the instructions or programs in the memory 1305 to perform the methods performed by the modules shown in fig. 10 and achieve the same technical effects, and are not repeated here.

Wherein the processor 1304 is configured to:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE.

Optionally, the processor 1204 is further configured to:

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the PDU session selection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a network function program or instruction, each process of the PDU session selection method embodiment can be realized, the same technical effect can be achieved, and the repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A protocol data unit, PDU, session selection method applied to a first network function, the method comprising:

receiving User Equipment (UE) information;

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE;

obtaining a target PDU session from a first PDU session, including any one or combination of the following:

2. The PDU session selection method of claim 1 wherein the information of the first PDU session is contained in context information of the UE.

3. The PDU session selection method as claimed in claim 1, further comprising:

Information of the first PDU session is received from a third network function.

4. The PDU session selection method as claimed in claim 1, further comprising:

information of the first PDU session from the UE is received.

5. The PDU session selection method as claimed in claim 1, wherein said method further comprises, before said transmitting session information to the second network function:

Multicast traffic information is received.

6. The PDU session selection method as claimed in claim 5, wherein said multicast service information comprises any one or a combination of the following:

multicast broadcast service Session identification, MBS Session ID;

An internet protocol IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

7. The PDU session selection method as claimed in claim 1, further comprising, before said transmitting session information to the second network function:

receiving indication information, wherein the indication information is used for the first network function to send the session information to the second network function according to the indication information.

8. The PDU session selection method of claim 1 wherein said UE information is from said UE or said second network function.

9. The PDU session selection method of claim 7 wherein said indication information is from said UE or said second network function.

10. The PDU session selection method according to any one of claims 1 to 9, wherein the PDU session of the UE comprises: all PDU sessions of the UE, or part of PDU sessions of the UE.

11. The PDU Session selection method according to any of claims 1 to 9, wherein the information of the PDU Session comprises a PDU Session ID and/or a Session management SM context ID.

12. The PDU session selection method as claimed in claim 11, wherein the PDU session information further comprises any one or a combination of the following:

the session management function SMF transmits the address;

SMF identification;

IP address of SMF;

port number of SMF.

13. The PDU session selection method as claimed in any one of claims 1 to 9, wherein obtaining the target PDU session from the first PDU session comprises:

And obtaining the target PDU session based on a preset rule.

14. A PDU session selection method applied to a second network function, the method comprising:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE;

15. The PDU session selection method as recited in claim 14, further comprising:

16. The PDU session selection method as recited in claim 14, further comprising:

and sending indication information to the first network function, wherein the indication information is used for the first network function to send the information of the target PDU session to the second network function according to the indication information.

17. A PDU session selection device, applied to a first network function, said device comprising:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE;

18. The PDU session selection apparatus of claim 17 wherein the information of the first PDU session is contained in context information of the UE.

19. The PDU session selection device as recited in claim 17, further comprising:

20. The PDU session selection device as recited in claim 17, further comprising:

and a fourth receiving module, configured to receive information of the first PDU session from the UE.

21. The PDU session selection device as recited in claim 17, further comprising:

22. The PDU session selection device of claim 21, wherein said multicast service information comprises any one or a combination of the following:

MBS Session ID；

An IP multicast transport address;

IP unicast transport address;

A source specific multicast address;

Multicast traffic indication.

23. The PDU session selection device as recited in claim 17, further comprising:

And a seventh receiving module, configured to receive indication information before sending session information to a second network function, where the indication information is used for the first sending module to send the session information to the second network function based on the indication information.

24. The PDU session selection apparatus as claimed in any one of claims 17 to 23, wherein the PDU session of the UE comprises: all PDU sessions of the UE, or part of PDU sessions of the UE.

25. The PDU Session selection apparatus according to any of claims 17 to 23, wherein the information of the PDU Session comprises a PDU Session ID and/or an SM context identification.

26. The PDU session selection device as claimed in claim 25, wherein the PDU session information further comprises any one or a combination of the following:

SMF transmission address;

SMF identification;

IP address of SMF;

port number of SMF.

27. The PDU session selection apparatus as claimed in any one of claims 17 to 23, wherein the first transmitting module is further configured to:

and selecting the target PDU session based on a preset rule.

28. A PDU session selection device, for use in a second network function, said device comprising:

Wherein the first PDU session comprises a PDU session of the UE;

the UE information includes any one or a combination of the following:

The user identification of the UE and the terminal identification of the UE;

29. The PDU session selection device as recited in claim 28, further comprising:

30. The PDU session selection device as recited in claim 28, further comprising:

31. A network function comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the PDU session selection method of any one of claims 1 to 13.

32. A network function comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the PDU session selection method of any one of claims 14 to 16.

33. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor, implements the steps of the PDU session selection method according to any one of claims 1 to 13, or the steps of the PDU session selection method according to any one of claims 14 to 16.