EP4627832A1 - Procédés, noeuds de réseau et supports pour supprimer un abonnement à un événement implicite - Google Patents

Procédés, noeuds de réseau et supports pour supprimer un abonnement à un événement implicite

Info

Publication number
EP4627832A1
EP4627832A1 EP22966758.9A EP22966758A EP4627832A1 EP 4627832 A1 EP4627832 A1 EP 4627832A1 EP 22966758 A EP22966758 A EP 22966758A EP 4627832 A1 EP4627832 A1 EP 4627832A1
Authority
EP
European Patent Office
Prior art keywords
network node
smf
request message
events
released
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22966758.9A
Other languages
German (de)
English (en)
Inventor
Subrata Mukherjee
David Castellanos Zamora
Jesus Angel DE GREGORIO RODRIGUEZ
Yunjie Lu
Emiliano Merino Vazquez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP4627832A1 publication Critical patent/EP4627832A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information

Definitions

  • AF Application Function
  • SMF Session Management Function
  • the SMF deregisters the last PDU session from the UDM (via Nudm_UEContextManagement service) , and the UDM, upon removal of ongoing event subscriptions stored for that SMF in Unified Data Repository (UDR) , needs to unsubscribe towards the SMF for the removed event (s) .
  • UDM Unified Data Repository
  • the UDM sends an unsubscribe (e.g., HTTP DELETE) request to the SMF.
  • HTTP DELETE unsubscribe
  • the SMF might have decided previously to add the event (s) requested for the UE as a part of UE context. This would mean that when the UE context is terminated, the event (s) /resource (s) in the SMF are no longer existing in the SMF. Therefore, the HTTP DELETE request from the UDM will result in a HTTP response 404 Not Found from the SMF, which might be understood by the Mobile Network Operator (MNO) as a faulty situation, when in reality this is not a fault. Even if the SMF returns 200 OK (instead of 404 Not Found) to fix this, unnecessary signaling (involving potential failovers and/or reattempts) is unavoidable.
  • MNO Mobile Network Operator
  • the embodiments of the present disclosure propose that the SMF indicates to the UDM (which has subscribed event (s) of a UE served by the SMF) that the event (s) of the UE stored as at least a part of UE context can be removed locally by the SMF upon a deregistration process of the SMF toward the UDM due to a last PDU session of the UE being released by the UE in the SMF.
  • the first network node is an SMF node
  • the second network node is a UDM node
  • a method performed by a second network node includes: transmitting, to a first network node, a request message for subscribing events of a UE served by the first network node; and receiving, from the first network node, a first indication indicating that the subscribed events of the UE stored as at least a part of UE context can be removed locally by the first network node upon a deregistration process of the first network node toward the second network node due to a last session of the UE being released by the UE in the first network node.
  • the method further includes: skipping a request message for unsubscribing/deleting the subscribed events of the UE upon the deregistration process of the first network node toward the second network node due to the last session of the UE being released by the UE in the first network node.
  • the first indication is received from the first network node in a response message for subscribing the events of the UE.
  • the request message for subscribing the events of the UE comprises a second indication indicating that the second network node can skip a request message for unsubscribing/deleting events of the UE upon the deregistration process of the first network node toward the second network node due to the last session of the UE being released by the UE in the first network node.
  • the first indication is received from the first network node in a deregistration request message received in the deregistration process of the first network node toward the second network node due to the last session of the UE being released by the UE in the first network node.
  • the SMF may decide to store the requested event (s) as a part of UE context (new resource ID) , i.e., the same as in S1_3 of FIG. 1.
  • the SMF transmits, to the UDM, a corresponding response message for subscribing the event (s) of the UE, e.g., a Nsmf_EventExposure_Subscribe response, in response to the request message transmitted in S4_2.
  • the response message may include an indication indicating that the subscribed event (s) of the UE stored as at least a part of UE context can be removed locally by the SMF upon the deregistration process of the SMF toward the UDM due to the last session of the UE being released by the UE in the SMF.
  • the indication may be a new IE in the response message, e.g., IMPLICIT_EVENT_SUBSCRIPTION_REMOVAL_LAST_SMF_REGISTRATION.
  • S4_4 is corresponding to S203 in FIG. 2 and S303 in FIG. 3, respectively.
  • the SMF transmits, to the UDM, a deregistration request message transmitted in the deregistration process of the SMF toward the UDM due to the last PDU session of the UE being released by the UE in the SMF, e.g., Nudm_UECM_deregistration_request, which includes e.g., UE ID, Session ID, etc.
  • Nudm_UECM_deregistration_request which includes e.g., UE ID, Session ID, etc.
  • the UDM transmits, to the SMF, a corresponding deregistration response message.
  • FIG. 5 schematically shows another exemplary signaling sequence diagram of a procedure for implicit event subscription removal upon a deregistration process of a first network node toward a second network node due to a last PDU session of a UE being released by the UE in the first network node, in which the methods performed by the first network node and the second network node according to the exemplary embodiments of the present disclosure are applied.
  • Some description of the exemplary signaling sequence diagram as shown in FIG. 4 may refer to that of methods 200 and 300 as previously described, and thus will be omitted here for simplicity.
  • SMF is taken as an example of the first network node as previously described
  • UDM is taken as an example of the second network node as previously described.
  • s subscribing event
  • the SMF decides to store the requested event (s) as a part of UE context (new resource ID) , i.e., the same as in S1_3 of FIG. 1.
  • the UDM stores the resource ID (s) allocated in the SMF in the UDR.
  • the last PDU session is released by the UE in the SMF, and the SMF triggers a deregistration process toward the UDM.
  • S5_7 is corresponding to S203 in FIG. 2 and S303 in FIG. 3, respectively.
  • the UDM transmits, to the SMF, a corresponding deregistration response message.
  • the transmitting unit 603 may be configured to transmit, to the second network node, a first indication indicating that the subscribed events of the UE stored as at least a part of UE context can be removed locally by the first network node upon a deregistration process of the first network node toward the second network node due to a last session of the UE being released by the UE in the first network node.
  • the first indication may be transmitted to the second network node in a response message for subscribing the events of the UE.
  • the request message for subscribing the events of the UE may include a second indication indicating that the second network node can skip a request message for unsubscribing/deleting the subscribed events of the UE upon the deregistration process of the first network node toward the second network node due to the last session of the UE being released by the UE in the first network node.
  • the first network node 600 may further include a determination unit (not shown) , which may be configured to determine, based on the second indication, that the subscribed events of the UE can be safely stored and removed as at least a part of UE context; and storing the subscribed events of the UE as at least a part of UE context.
  • a determination unit not shown
  • the first network node may be an SMF node
  • the second network node may be a UDM node
  • FIG. 7 schematically shows a block diagram of a first network node 700 according to an exemplary embodiment of the present disclosure.
  • the first network node 700 in FIG. 7 may perform the method 200 as described previously with reference to FIG 2. Accordingly, some detailed description on the first network node 700 may refer to the corresponding description of the method 200 in FIG. 2 as well as the signaling sequence diagrams of FIGS. 4 and 5, and thus will be omitted here for simplicity.
  • the first network node 700 includes at least one processor 701 and at least one memory 703.
  • the at least one processor 701 includes e.g., any suitable CPU (Central Processing Unit) , microcontroller, DSP (Digital Signal Processor) , etc., capable of executing computer program instructions.
  • the at least one memory 703 may be any combination of a RAM (Random Access Memory) and a ROM (Read Only Memory) .
  • the at least one memory 703 may also include persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, or solid state memory or even remotely mounted memory.
  • the at least one memory 703 stores instructions executable by the at least one processor 701.
  • the instructions when loaded from the at least one memory 703 and executed on the at least one processor 701, may cause the first network node 700 to perform the actions, e.g., of the procedures as described earlier in conjunction with FIG. 2.
  • the instructions when loaded from the at least one memory 703 and executed on the at least one processor 701, may cause the first network node 700 to receive, from a second network node, a request message for subscribing events of a UE served by the first network node; and transmit, to the second network node, a first indication indicating that the subscribed events of the UE stored as at least a part of UE context can be removed locally by the first network node upon a deregistration process of the first network node toward the second network node due to a last session of the UE being released by the UE in the first network node.
  • the instructions when loaded from the at least one memory 703 and executed on the at least one processor 701, may cause the first network node 700 to remove the UE context locally in the first network node.
  • the first network node may be an SMF node
  • the second network node may be a UDM node
  • FIG. 9 schematically shows a block diagram of a second network node 900 according to an exemplary embodiment of the present disclosure.
  • the second network node 900 in FIG. 9 may perform the method 300 as described previously with reference to FIG. 3. Accordingly, some detailed description on the second network node 900 may refer to the corresponding description of the method 300 in FIG. 3 as well as the signaling sequence diagrams of FIGS. 4 and 5, and thus will be omitted here for simplicity.
  • the request message for subscribing the events of the UE may include a second indication indicating that the second network node can skip a request message for unsubscribing/deleting events of the UE upon the deregistration process of the first network node toward the second network node due to the last session of the UE being released by the UE in the first network node.
  • the first network node may be an SMF node
  • the second network node may be a UDM node
  • the computer program includes: code/computer readable instructions, which when executed by the at least one processor 701 causes the first network node 700 to perform the actions, e.g., of the procedures described earlier in conjunction with FIG. 2; or code/computer readable instructions, which when executed by the at least one processor 901 causes the second network node 900 to perform the actions, e.g., of the procedures described earlier respectively in conjunction with FIG. 3.
  • processing circuitry executing instructions stored on in memory, which in certain embodiments may be a computer program product in the form of a non-transitory computer-readable storage medium.
  • some or all of the functionality may be provided by the processing circuitry without executing instructions stored on a separate or discrete device-readable storage medium, such as in a hard-wired manner.
  • the processing circuitry can be configured to perform the described functionality. The benefits provided by such functionality are not limited to the processing circuitry alone or to other components of the computing device, but are enjoyed by the computing device as a whole, and/or by end users and a wireless network generally.

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation concerne un premier noeud de réseau et un procédé (200) mis en oeuvre par le premier noeud de réseau. Le procédé (200) consiste à : recevoir (S201) en provenance d'un second noeud de réseau, un message de demande d'abonnement à des événements d'un équipement utilisateur (UE) desservi par le premier noeud de réseau ; et transmettre (S203) au second noeud de réseau une première indication indiquant que les événements d'abonnement de l'UE, stockés en tant qu'au moins une partie de contexte d'UE, peuvent être supprimés localement par le premier noeud de réseau lors d'un processus de désabonnement, du premier noeud de réseau vers le second noeud de réseau, en raison de la libération d'une dernière session de l'UE par l'UE dans le premier noeud de réseau. La présente divulgation se réfère en outre à un second noeud de réseau correspondant et à un procédé (300) mis en oeuvre par le second noeud de réseau.
EP22966758.9A 2022-11-29 2022-11-29 Procédés, noeuds de réseau et supports pour supprimer un abonnement à un événement implicite Pending EP4627832A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/135016 WO2024113159A1 (fr) 2022-11-29 2022-11-29 Procédés, noeuds de réseau et supports pour supprimer un abonnement à un événement implicite

Publications (1)

Publication Number Publication Date
EP4627832A1 true EP4627832A1 (fr) 2025-10-08

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Application Number Title Priority Date Filing Date
EP22966758.9A Pending EP4627832A1 (fr) 2022-11-29 2022-11-29 Procédés, noeuds de réseau et supports pour supprimer un abonnement à un événement implicite

Country Status (3)

Country Link
EP (1) EP4627832A1 (fr)
CN (1) CN120283427A (fr)
WO (1) WO2024113159A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102255875A (zh) * 2010-05-20 2011-11-23 华为软件技术有限公司 服务器切换方法及系统
CN110475239A (zh) * 2018-05-11 2019-11-19 华为技术有限公司 订阅更新方法、设备及系统
CN115669106B (zh) * 2020-05-19 2024-10-11 瑞典爱立信有限公司 用于维持对订户nf的订阅的技术
CN112512044A (zh) * 2020-10-16 2021-03-16 中兴通讯股份有限公司 签约数据更新方法、装置、节点和存储介质

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CN120283427A (zh) 2025-07-08
WO2024113159A1 (fr) 2024-06-06

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