Method and device for protocol data unit session management and computer readable storage medium
By using user-specific profile information in 5G networks, the method addresses the lack of individual adaptation in PDU session management, enabling enhanced service provisioning and user experience through personalized settings.
Patent Information
- Application Number
- PCT/CN2024/077304
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-16
- Publication Date
- 2025-08-21
AI Technical Summary
Existing PDU session management in 5G networks fails to adequately adapt to the individual needs of users, as it primarily relies on user equipment information rather than user-specific profiles, leading to suboptimal service provisioning.
The method involves obtaining user profile information based on a user identifier, including quality of service and policy parameters, from a unified data management entity, allowing for personalized settings and adaptations for each user, even when using the same user equipment.
Enables more tailored and efficient PDU session management by considering user-specific settings, such as routing and quality of service, enhancing network performance and user experience.
Smart Images

Figure CN2024077304_21082025_PF_FP_ABST
Abstract
Description
Method and device for protocol data unit session management and computer readable storage mediumTechnical Field
[0001] The present invention relates to a method and device for protocol data unit session management and a computer readable storage medium.Background
[0002] In the prior art in order to establish a protocol data unit (PDU) session, the user equipment (UE) sends a PDU session establishment request including information about the user equipment to the access and mobility function (AMF) of the core network, e.g. via a gNB in a 5G system. The AMF sends a session management (SM) content to the session management function (SMF) . The SMF sends a subscription data request to the user data management (UDM) .
[0003] The UDM determines whether the UE is authorized, obtains subscription data of the UE (e.g. quality of service parameters of the UE) from the UDM or the PCF (policy control function) and sends this information to the SMF.
[0004] Then the SMF sends a response to the SM content creation message to the AMF, selects one UPF (user plane function) to establish the PDU session and establishes a n4 session between the UPF and SMF. The SMF then transmits the PDU session establishment accept message to the AMF. The AMF sends this accept message to the UE via the gNB so that the UE can transmit the PDU.Summary
[0005] It is an object of the present invention to provide methods and devices for PDU session management, which allow to better adapt to the needs of an individual user.
[0006] This object is achieved by the features of method claims 1, 8 and 9, device claims 10, 11 and 12 and by computer readable storage mediums according to claims 13 to 15.
[0007] Brief Description of Figure
[0008] FIG. 1 illustrates a flow chart of the method according to an embodiment of the disclosure.Detailed Description of Embodiments
[0009] The inventive method for PDU session management performed by a core network device, in particular a 5G core network device, comprises the following steps:
[0010] receiving a PDU session establishment request from a user equipment, UE, in particular via a base station, wherein the PDU session establishment request comprises a user identifier identifying a specific user,
[0011] obtaining User profile information corresponding to the user identifier,
[0012] determining QoS and / orpolicy parameters for the PDU session by considering the user profile information.
[0013] Therefore, in contrast to the prior art User profile information is obtained based on a user identifier instead of based on the user equipment alone. This allows for a more individual adaptation to the needs of a user. E. g. user specific settings such as routing information, quality of service settings etc. can be considered individually for each user when different users use the same user equipment. Of course, in addition to the user identifier information about the user equipment itself can also be considered in order to obtain User profile information.
[0014] In a preferred embodiment obtaining the subscription data corresponding to the user identifier comprises:
[0015] obtaining the User profile information corresponding to the user identifier from a User identify Profile of the specific user previously stored in the core network device,
[0016] wherein the User Identifier Profile is stored in a Unified Data Management, UDM, or Unified Data Repository, UDR, entity of the core network device,
[0017] wherein, optionally, the User profile information comprises a device associated to the user, credentials Quality of Service Parameter s and / or policy parameters.
[0018] The User identify profile can further comprise beside the User identifier information about this user′s devices, associated security credentials, user specific QoS settings, routing information, etc.
[0019] It is further preferred that obtaining the User profile information corresponding to the user identifier comprises:
[0020] determining, whether the user identifier received in the PDU session establishment request is active and / or authorized,
[0021] obtaining the User profile information corresponding to the user identifier in response to a positive determination, or
[0022] determining whether the user identifier is an active identifier stored in association with the UE sending the PDU session establishment request, or is associated with a Subscription Permanent Identifier, SUPI, of the UE,
[0023] obtaining the User profile information corresponding to the user identifier corresponding to the user identifier in response to a positive determination.
[0024] Further, its preferred that receiving the PDU session establishment request comprises:
[0025] receiving, by an Access and Mobility Management Function, AMF, entity of the core network, the PDU session establishment request from the UE (via the base station) ,
[0026] sending, by the AMF, the session management SM content creation request to a Session Management Function, SMF entity of the core network, including user identifier,
[0027] sending, by the SMF, the subscription data request to the UDM to obtain the User profile information,
[0028] with the additional optional step of:
[0029] generating, by the AMF, a session management, SM content creation request comprising the user identifier.
[0030] It is further preferred that the method comprises the additional step:
[0031] sending a PDU session establishment accept message to the UE in particular via the base station,
[0032] wherein preferably obtaining the User profile information corresponding to the user identifier further comprises:
[0033] sending, by the UDM, the User profile information corresponding to the user identifier to the SMF.
[0034] It is further preferred that establishing the PDU session based on the User profile information corresponding to the user identifier comprises:
[0035] sending, by the SMF, a SM content creation request response to the AMF,
[0036] selecting, by the SMF, a User Plane Function, UPF entity of the core network for the PDU session,
[0037] establishing a N4 session between the SMF and the UPF.
[0038] It is further preferred that sending the PDU session establishment accept message to the UE (via the base station) comprises:
[0039] sending, by the SMF, a N1N2 message Transfer including the PDU session establishment accept message to the AMF,
[0040] sending, by the AMF, the PDU session establishment accept message to the UE (via the base station) .
[0041] The invention further relates to a method for PDU session management performed by a user equipment comprising the following method steps:
[0042] sending the PDU session establishment request to a core network in particular via a base station, which includes user identifier,
[0043] receiving a PDU session establishment accept message to the UE in particular via the base station.
[0044] The invention further comprises a method for PDU session management performed by a base station with the following method steps:
[0045] receiving a PDU session establishment request comprising a user identifier identifying a specific user,
[0046] sending the PDU session establishment request to a core network,
[0047] receiving the PDU session establishment accept message from the core network,
[0048] receiving a PDU session establishment accept message to the UE (via the base station) .
[0049] Further, the invention relates to a 5G core network device adapted to perform a PDU session management method as described above.
[0050] The invention further relates to a user equipment adapted to perform a PDU session management method as described above.
[0051] The invention further relates to a base station adapted to perform a PDU session management method as described above.
[0052] The invention further relates to a computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method as described in the context of a 5G core network device. Hereby the computer is part of the 5G core network device.
[0053] The invention further relates to a computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method, which is described in the context of a 5G user equipment. Hereby the computer is part of the 5G user equipment.
[0054] The invention further relates to a computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method as disclosed in the context of a 5G base station. Hereby the computer is part of the 5G base station.
[0055] In the following a preferred embodiment of the invention is described in the context of a figure.
[0056] The figure shows a PDU session establishment based on a user identifier.
[0057] The method can comprise the following steps:
[0058] 0. UDM created or stored the User identity Profile, and the User identifier is active in UDM or PCF.
[0059] 1. UE sends the PDU session establishment request to AMF via gNB, including User Identifier. This also can be a PDU session modification request.
[0060] 2. AMF sends the SM context creation request to SMF including User Identifier.
[0061] 3. SMF sends the subscription data request to obtain the subscription data, including User identifier.
[0062] 4. UDM checks whether the User identifier is active and / or authorized, or if the user identifier is the active user identifier stored in UDM associated with this UE / SUPI.
[0063] 5. UDM sends the User′s preferred QoS parameters to SMF.
[0064] 6. SMF sends the SM context creation response to AMF.
[0065] 7-8. SMF selects UPF, and establishes the N4 session between UPF and SMF.
[0066] 9. SMF sends N1N2 message Transfer to AMF including PDU session establishment accept message.
[0067] 10. AMF sends PDU session establishment accept message to UE via gNB
Claims
1.A method for Protocol Data Unit (PDU) session management, performed by a (5G) core network device, comprising:receiving a PDU session establishment request from a user equipment (UE) in particular via a base station, wherein the PDU session establishment request comprises a user identifier identifying a specific user,obtaining User profile information corresponding to the user identifier,determining QoS and / or policy parameters for the PDU session by considering the user profile information.2.The method of claim 1, wherein obtaining the user profile information corresponding to the user identifier comprises:obtaining the User profile information corresponding to the user identifier from a User identify Profile of the specific user previously stored in the core network device,wherein the User Identifier Profile is stored in a Unified Data Management (UDM) or Unified Data Repository (UDR) entity of the core network device,wherein, optionally, the User profile information comprises a device associated to the user, credentials Quality of Service Parameters and / or policy parameters.3.The method of any one of the claims 1 and 2, wherein obtaining the User profile information corresponding to the user identifier comprises:determining, whether the user identifier received in the PDU session establishment request is active and / or authorized,obtaining the User profile information corresponding to the user identifier in response to a positive determination, ordetermining whether the user identifier is an active identifier stored in association with the UE sending the PDU session establishment request, or is associated with a Subscription Permanent Identifier (SUPI) of the UE,obtaining the User profile information corresponding to the user identifier corresponding to the user identifier in response to a positive determination.4.The method of any one of the claims 1 to 3, wherein receiving the PDU session establishment request comprises:receiving, by an Access and Mobility Management Function (AMF) entity of the core network, the PDU session establishment request from the UE in particular via the base station,sending, by the AMF, the session management SM content creation request to a Session Management Function, SMF entity of the core network, including user identifier,sending, by the SMF, the subscription data request to the UDM to obtain the user profile information with the additional optional step of:generating, by the AMF, a session management (SM) content creation request comprising the user identifier.5.The method of any one of the claims 1 to 4, with the additional step:sending a PDU session establishment accept message to the UE in particular via the base station,wherein preferably obtaining the User profile information corresponding to the user identifier further comprises:sending, by the UDM, the User profile information corresponding to the user identifier to the SMF.6.The method of any one of the claims 1 to 5, wherein establishing the PDU session based on the User profile information corresponding to the user identifier comprises:sending, by the SMF, a SM content creation request response to the AMF,selecting, by the SMF, a User Plane Function (UPF) entity of the core network for the PDU session,establishing a N4 session between the SMF and the UPF.7.The method of any one of the claims 1 to 6, wherein sending the PDU session establishment accept message to the UE in particular via the base station comprises:sending, by the SMF, a N1N2 message Transfer including the PDU session establishment accept message to the AMF,sending, by the AMF, the PDU session establishment accept message to the UE (via the base station) .8.A method for Protocol Data Unit (PDU) session management, performed by a User Equipment, comprising:sending the PDU session establishment request to a core network in particular via a base station, which includes user identifier,receiving a PDU session establishment accept message to the UE in particular via the base station,9.A method for Protocol Data Unit (PDU) session management, performed by a base station, comprising:receiving a PDU session establishment request comprising a user identifier identifying a specific user,sending the PDU session establishment request to a core network,receiving the PDU session establishment accept message from the core network,receiving a PDU session establishment accept message to the UE (via the base station) .10.A 5G Core network Device adapted to perform a method for Protocol Data Unit (PDU) session management according to any one of claims 1 to 7.11.A User Equipment adapted to perform a method for Protocol Data Unit (PDU) session management according to claim 8.12.A Base Station adapted to perform a method for Protocol Data Unit (PDU) session management according to claim 9.13.A computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer being part of a 5G core network device to carry out the method of any one of claims 1 to 7.14.A computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer being part of a 5G User Equipment to carry out the method of claim 8.15.A computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer being part of a 5G Base Station to carry out the method of claim 9.
Citation Information
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