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WO2025008948A1 - Procédé et système de suppression d'un identifiant de session d'unité de données par paquets (pdu) - Google Patents

Procédé et système de suppression d'un identifiant de session d'unité de données par paquets (pdu) Download PDF

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Publication number
WO2025008948A1
WO2025008948A1 PCT/IN2024/050929 IN2024050929W WO2025008948A1 WO 2025008948 A1 WO2025008948 A1 WO 2025008948A1 IN 2024050929 W IN2024050929 W IN 2024050929W WO 2025008948 A1 WO2025008948 A1 WO 2025008948A1
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WIPO (PCT)
Prior art keywords
container
pdu session
pdu
request message
amf
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.)
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Application number
PCT/IN2024/050929
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English (en)
Inventor
Aayush Bhatnagar
Birendra Bisht
Harbinder Pal Singh
Suman Naskar
Pradeep Kumar
Gunna Srinivas
Sourabh Jain
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Jio Platforms Ltd
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Jio Platforms Ltd
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Publication date
Application filed by Jio Platforms Ltd filed Critical Jio Platforms Ltd
Publication of WO2025008948A1 publication Critical patent/WO2025008948A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/143—Termination or inactivation of sessions, e.g. event-controlled end of session
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/146—Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding

Definitions

  • the present invention relates to the field of 5G core network and, more particularly, relates to a method and system for deletion of a Packet Data Unit (PDU) session ID during a PDU release.
  • PDU Packet Data Unit
  • a Packet Data Unit (PDU) Session Establishment Request is received from User Equipment (UE), which is processed through Radio Access Network (RAN), an Access and Mobility Management Function (AMF) and a Session Management Function (SMF) whenever any data session needs to be established by User Equipment.
  • UE User Equipment
  • RAN Radio Access Network
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • PDU sessions are established and processed between UE and SMF using NAS Signaling message exchange between these two network nodes as per 3GPP standard TS 24.501 - related to PDU Session Establishment Procedure.
  • the established PDU session is/are deleted or released upon the release request made by the UE or network.
  • the PDU Session Release request when received from UE via RAN/AMF is sent to the SMF.
  • SMF sends PDU Session Release response to the UE (by sending PDU SESSION RELEASE COMMAND - NAS Signaling message) and receives the acknowledgement message back from UE (in form of PDU SESSION RELEASE COMPLETE - NAS Signaling message).
  • the SMF Upon receiving the acknowledgement message, the SMF sends the release notification to AMF.
  • AMF on receiving release notification finally deletes the PDU Session context corresponding to UE (Identified uniquely by the PDU ID protocol field).
  • the AMF waits for release notification message from SMF for deleting the PDU Session context.
  • Such technique renders the system more complicated and results in procedural collisions as AMF is unnecessarily waiting for release notification from SMF though PDU Session context has been successfully deleted from UE/RAN when PDU Session Release COMPLETE message (received from UE) is sent to SMF.
  • PDU Session Release COMPLETE message received from UE
  • This procedural collision mainly arises because AMF is waiting for release notification transaction to get completed and UE/RAN can initiate new procedures because as per UE/RAN state, PDU Session Release signaling has been completed from their end.
  • AMF on receiving new procedure request from UE/RAN needs to hold it for processing as it needs to first complete the PDU Release procedure (i.e., release notification transaction between itself and SMF). This holding of new procedures results in delay in processing or procedure handling race condition or even procedure failure scenarios.
  • One or more embodiments of the present disclosure provide a method and a system for deletion of a Packet Data Unit (PDU) session ID during a PDU release.
  • PDU Packet Data Unit
  • the system for deletion of the PDU session ID during a PDU release includes a receiving unit configured to receive a first PDU session release request message from a User Equipment (UE).
  • the first PDU session release request message is included in a first Session Management (SM) container along with the PDU session ID.
  • the system further includes an updating unit configured to update the received first PDU release request message with an indication of a User Location Information (ULI).
  • the updated PDU release request message is included in a second SM container.
  • the system further includes a transmittal unit configured to transmit the first SM container and the second SM container to an Access and Mobility Management Function (AMF) via a Radio Access Network (RAN).
  • AMF Access and Mobility Management Function
  • the system further includes a checking unit configured to check if a PDU session ID is available within each of the first SM container and the second SM container. Each of the first and the second SM containers are accepted if the PDU session ID is available therein.
  • the system further includes the transmittal unit configured to transmit an update SM request message from the AMF to the SMF.
  • the update SM request message includes each of the first and the second containers and the PDU session ID.
  • the system further includes a deletion unit configured to delete a PDU session at the SMF on receipt of the update SM request message. On deletion, the PDU session is deleted from an upper function and a response message containing the first SM container and the second SM container is transmitted to the AMF.
  • the transmittal unit is configured to transmit the first SM container and the second SM container to the RAN from the SMF via the AMF.
  • the received first SM container includes the PDU session release command and the second SM container includes the PDU session release command transfer.
  • the transmittal unit is further configured to transmit the received first SM container from the RAN to the UE.
  • the transmittal unit is further configured to transmit the received second SM container from the RAN to the SMF via the AMF.
  • the received second SM container includes the PDU session resource release response transfer message included therein.
  • the transmittal unit upon transmission of the received first SM container from the RAN to the UE, is configured to transmit the first SM container from the UE to the SMF via the AMF.
  • the first SM container includes a message indicating completion of the PDU session.
  • the deletion unit upon transmission of the received first SM container from the RAN to the UE the deletion unit is configured to delete the PDU session ID at the AMF.
  • the first PDU session release request message is at least one of an N 1 message type and the updated PDU release request message is at least one of an N2 message type.
  • the update SM request message is transmitted to the SMF from the AMF utilizing at least one communication protocol, such as, a Hypertext Transfer Protocol 2 (HTTP) protocol.
  • HTTP Hypertext Transfer Protocol 2
  • each of the first and the second SM container is a N1 SM container and a N2 SM container, respectively.
  • a method for deletion of the PDU session Id during the PDU release includes the step of receiving the first PDU session release request message from the User Equipment (UE).
  • the first PDU session release request message is included in the first Session Management (SM) container along with the PDU session ID.
  • the method further includes the step of updating the received first PDU release request message with the indication of the User Eocation Information (UEI).
  • the updated PDU release request message is included in the second SM container.
  • the method further includes the step of transmitting the first SM container and the second SM container to the Access and Mobility Management Function (AMF) via the Radio Access Network (RAN).
  • AMF Access and Mobility Management Function
  • the method further includes the step of checking if the PDU session ID is available within each of the first SM container and the second SM container. Each of the first and the second SM containers are accepted if the PDU session ID is available therein.
  • the method further includes the step of transmitting the update SM request message from the AMF to the SMF, the update SM request message includes each of the first and the second containers and the PDU session ID.
  • the method further includes the step of deleting the PDU session at the SMF on receipt of the update SM request message. Upon deletion, the PDU session is deleted from the upper function and the response message containing the first SM container and the second SM container is transmitted to the AMF.
  • FIG. 1 is an exemplary block diagram of a communication system for deletion of a Packet Data Unit (PDU) session ID during a PDU release, according to one or more embodiments of the present invention
  • FIG. 2 is an exemplary signal flow diagram for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention
  • FIG. 3 an exemplary block diagram of a system for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention
  • FIG. 4 is a schematic representation of a workflow of the communication system of FIG. 1, according to the one or more embodiments of the present invention.
  • FIG. 5 is a schematic representation of a method for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention.
  • the present invention discloses a system and method for deletion of a Packet Data Unit (PDU) session ID during a PDU release.
  • PDU Packet Data Unit
  • FIG. 1 illustrates an exemplary block diagram of a communication system 100 for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present disclosure.
  • the communication system 100 includes a User Equipment (UE) 102, a server 104, a network 106 and a system 108 communicably coupled to each other for deletion of the PDU session during the PDU release.
  • the UE 102 aids a user to interact with the system 108 for transmitting, a first Packet Data Unit (PDU) session release request message to one or more processor 302 (as shown in FIG. 3). Further, the UE 102 transmits a first Session Management (SM) container to a Session Management Function (SMF).
  • SM Session Management
  • SMF Session Management Function
  • the UE 102 includes, but not limited to, a first UE 102a, a second UE 102b, and a third UE 102c, and should nowhere be construed as limiting the scope of the present disclosure.
  • the UE 102 may include a plurality of UEs as per the requirement.
  • each of the first UE 102a, the second UE 102b, and the third UE 102c, will hereinafter be collectively and individually referred to as the “User Equipment (UE) 102”.
  • UE User Equipment
  • the UE 102 is one of, but not limited to, any electrical, electronic, electro-mechanical or an equipment and a combination of one or more of the above devices such as virtual reality (VR) devices, augmented reality (AR) devices, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, mainframe computer, or any other computing device.
  • VR virtual reality
  • AR augmented reality
  • the communication system 100 includes the server 104 accessible via the network 106.
  • the server 104 may include, by way of example but not limitation, one or more of a standalone server, a server blade, a server rack, a bank of servers, a server farm, hardware supporting a part of a cloud service or system, a home server, hardware running a virtualized server, one or more processors executing code to function as a server, one or more machines performing server-side functionality as described herein, at least a portion of any of the above, some combination thereof.
  • the entity may include, but is not limited to, a vendor, a network operator, a company, an organization, a university, a lab facility, a business enterprise side, a defence facility side, or any other facility that provides service.
  • the network 106 includes, by way of example but not limitation, one or more of a wireless network, a wired network, an internet, an intranet, a public network, a private network, a packet-switched network, a circuit-switched network, an ad hoc network, an infrastructure network, a Public-Switched Telephone Network (PSTN), a cable network, a cellular network, a satellite network, a fiber optic network, or some combination thereof.
  • PSTN Public-Switched Telephone Network
  • the network 106 may include, but is not limited to, a Third Generation (3G), a Fourth Generation (4G), a Fifth Generation (5G), a Sixth Generation (6G), a New Radio (NR), a Narrow Band Internet of Things (NB-IoT), an Open Radio Access Network (O-RAN), and the like.
  • 3G Third Generation
  • 4G Fourth Generation
  • 5G Fifth Generation
  • 6G Sixth Generation
  • NR New Radio
  • NB-IoT Narrow Band Internet of Things
  • O-RAN Open Radio Access Network
  • the network 106 may also include, by way of example but not limitation, at least a portion of one or more networks having one or more nodes that transmit, receive, forward, generate, buffer, store, route, switch, process, or a combination thereof, etc. one or more messages, packets, signals, waves, voltage or current levels, some combination thereof, or so forth.
  • the network 106 may also include, by way of example but not limitation, one or more of a wireless network, a wired network, an internet, an intranet, a public network, a private network, a packet-switched network, a circuit-switched network, an ad hoc network, an infrastructure network, a Public- Switched Telephone Network (PSTN), a cable network, a cellular network, a satellite network, a fiber optic network, a VOIP or some combination thereof.
  • PSTN Public- Switched Telephone Network
  • the communication system 100 further includes the system 108 communicably coupled to the server 104 and the UE 102 via the network 106.
  • the system 108 is configured to delete the PDU session during the PDU release.
  • the system 108 is adapted to be embedded within the server 104 or embedded as an individual entity. However, for the purpose of description, the system 108 is described as an integral part of the server 104, without deviating from the scope of the present disclosure.
  • FIG. 2 is an exemplary signal flow diagram for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention.
  • the system 108 includes, but not limited to, various system components, such as the UE 102, a Radio Access Network (RAN) 204, an Access and Mobility Management Function (AMF) 206, and a Session Management Function (SMF) 208.
  • RAN Radio Access Network
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • a first PDU session release request message is forwarded to the RAN 204 from the UE 102.
  • the RAN 204 is configured to connect each of the UEs 102 to the network 106 via at least one wireless link.
  • the RAN unit 204 includes, but not limited to Open RAN, Global System for Mobile communications (GSM) RAN, or GRAN, GSM Enhanced Data GSM Environment (EDGE) RAN, or GERAN, Universal Mobile Telecommunications System (UMTS) Terrestrial RAN, or UTRAN, Evolved Universal Terrestrial RAN, or E-UTRAN.
  • GSM Global System for Mobile communications
  • EDGE GSM Enhanced Data GSM Environment
  • UMTS Universal Mobile Telecommunications System
  • the UE 102 is configured to transmit the first PDU session release request message to the RAN 204 as an N 1 message.
  • the N 1 message is sent through an N 1 interface established between the UE 102 and the RAN 204.
  • the N 1 interface typically refers to the interface between the UE 102 and the AMF 206.
  • the N 1 message refers to the message exchanged between the network 106 functions over the N1 interface.
  • the N1 message includes a Non-Access Stratum (NAS) message.
  • NAS Non-Access Stratum
  • the N1 interface is the specific interface for the NAS protocol between the network 106 and the UE 102.
  • the first PDU session release request message is included in a first Session Management (SM) container along with the PDU session ID.
  • the first SM container is also referred to as N1 SM container in the present disclosure.
  • the first SM container is a containerized environment configured to perform session management, such as session setup, authentication, authorization, policy enforcement, and session termination.
  • the PDU session ID is a unique identifier assigned to each PDU session established between the UE 102 and the network 106.
  • the RAN 204 forwards the first PDU session release request message to the AMF 206.
  • the AMF 206 is configured to handle access authentication, mobility management, and security functions for the UE 102 accessing the network 106.
  • the AMF unit 206 is configured to, but not limited to, access authentication, registration management, mobility management, session management, security functions, policy enforcement, and interworking with legacy networks.
  • the first PDU session release request message is forwarded with an indication of User Location Information (ULI) to the AMF 206.
  • ULI User Location Information
  • the ULI refers to the data related to the geographical position of the UE 102 within the network 106 coverage area.
  • the first SM container is transmitted from the RAN unit 204 to the AMF unit 206.
  • the first SM container includes the first PDU session release request message and a second SM container.
  • the second SM container is a containerized environment responsible for session management functionalities such as session setup, mobility management, Quality of Service (QoS) enforcement, and session release specific to the radio access network.
  • the second SM container is referred to as N2 SM container in the present disclosure.
  • the AMF 206 determines if the PDU session ID is available within each of the first and the second SM containers. If the PDU session ID is present, then the PDU session ID is accepted by the AMF 206. If the PDU session ID is not available in each of the first and second SM containers, the PDU session ID will be rejected.
  • the AMF 206 Upon determining the availability of the PDU session ID, the AMF 206 creates and transmits an update SM request message to the SMF 208.
  • the SMF 208 is configured to establish, manage, and terminate sessions.
  • the SMF unit 208 is further configured to, but is not limited to, user session establishment, mobility management, Quality of Service (QoS) enforcement, policy enforcement, session termination and charging and billing.
  • QoS Quality of Service
  • the update SM request message is created using at least one network protocol connection.
  • the at least one network protocol connection includes, but not limited to, Transmission Control Protocol (TCP), User Datagram Protocol (UDP), File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), Simple Network Management Protocol (SNMP), Internet Control Message Protocol (ICMP), Hypertext Transfer Protocol Secure (HTTPS) and Terminal Network (TELNET).
  • TCP Transmission Control Protocol
  • UDP User Datagram Protocol
  • FTP File Transfer Protocol
  • HTTP Hypertext Transfer Protocol
  • SNMP Simple Network Management Protocol
  • ICMP Internet Control Message Protocol
  • HTTPS Hypertext Transfer Protocol Secure
  • TELNET Terminal Network
  • the PDU session release Upon receiving the update SM request message, at the SMF 208, the PDU session release is initiated and deleted from upper functions by the SMF 208.
  • the update SM response message i.e., the PDU session release response message, along with the first SM container and the second SM container is transmitted to the AMF 206.
  • the upper function refers to the network function that initiates or manages the release of the PDU session. Typically, the upper function could be the SMF 208.
  • the SMF 208 initiate the release of the PDU session in response to the updated SM request message.
  • the AMF 206 Upon releasing the PDU session by the SMF 208, the AMF 206 initiates or coordinates the release of the PDU session.
  • the AMF 206 transmits the PDU session release response message including the first and second SM containers to the RAN 204.
  • the first SM container includes a PDU session release command
  • the second SM container includes a PDU session resource release command transfer.
  • the PDU session release command is a command used in the network 106.
  • the PDU session resource release command transfer refers to the process of releasing resources associated with the PDU session in a mobile network. This command is typically exchanged between network elements to initiate the release of resources allocated for a specific PDU session. More specifically, when the PDU session is irrelevant, i.e., when the UE 102 is deactivating or detaching from the network 106, the network 106 initiates the release of resources associated with the respective PDU session. The network 106 deallocates IP addresses, releasing bearer resources, and freeing up other network resources that were allocated for the session.
  • the RAN 204 Upon receiving the PDU session release response message, the RAN 204 transmits the first SM container including the PDU session release command to the UE 102. Subsequently, the RAN 204 will respond utilizing the second SM container including the PDU session resource release command transfer to the AMF 208. The RAN 204 will respond to the AMF 208 with the second SM container including a PDU session resource release response transfer.
  • the AMF 206 Upon receiving the response, the AMF 206 transmits the update SM including the second SM container to the SMF 208. On receipt of the update SM request, the SMF 208 transmits an acknowledgment response to the AMF 206.
  • the UE 102 will respond back to the AMF 206 via the RAN 204 with the first SM container including a PDU session release complete message.
  • the AMF 206 On receiving the PDU session release complete message, the AMF 206 transmits the PDU session release complete message including the first SM container to the SMF 208. On receipt of the PDU session release complete message, the SMF 208 transmits an acknowledgment response of receiving the PDU session release complete message to the AMF 206. Upon receiving the acknowledgement response, the AMF 206 deletes the PDU session ID. [0055] Upon transmitting the acknowledgement response, the SMF 208 transmits a notify request to the AMF 2O6.The notify request is to notify the AMF 206 that the SM context for this PDU session is released. Thereafter, the AMF 206 will respond with an acknowledgement response to the notify request at the SMF 208. The notify request notifies that the release of the PDU session ID is successful. Accordingly, the PDU session ID is deleted during the PDU release.
  • FIG. 3 is an exemplary block diagram of the system 108 for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention.
  • the system 108 includes one or more processors 302, a memory 304, a user interface 306, and a database 308.
  • processors 302 may include more than one processors 302 as per the requirement of the network 106.
  • the one or more processors 302, hereinafter referred to as the processor 302 may be implemented as one or more microprocessors, microcomputers, microcontrollers, digital signal processors, central processing units, state machines, logic circuitries, single board computers, and/or any devices that manipulate signals based on operational instructions.
  • the processor 302 is configured to fetch and execute computer-readable instructions stored in the memory 304.
  • the memory 304 may be configured to store one or more computer-readable instructions or routines in a non-transitory computer-readable storage medium, which may be fetched and executed to create or share data packets over a network service.
  • the memory 304 may include any non-transitory storage device including, for example, volatile memory such as RAM, or non-volatile memory such as disk memory, EPROMs, FLASH memory, unalterable memory, and the like.
  • the user interface 306 includes a variety of interfaces, for example, interfaces for a graphical user interface, a web user interface, a Command Line Interface (CLI), and the like.
  • the user interface 306 facilitates communication of the system 108.
  • the user interface 306 provides a communication pathway for one or more components of the system 108. Examples of such components include, but are not limited to, the UE 102 and the database 308.
  • the database 308 is one of, but not limited to, a centralized database, a cloudbased database, a commercial database, an open-source database, a distributed database, an end-user database, a graphical database, a No-Structured Query Language (NoSQL) database, an object-oriented database, a personal database, an in-memory database, a document-based database, a time series database, a wide column database, a key value database, a search database, a cache databases, and so forth.
  • NoStructured Query Language (NoSQL) database No-Structured Query Language
  • object-oriented database a personal database
  • an in-memory database a document-based database
  • a time series database a time series database
  • a wide column database a key value database
  • search database a cache databases
  • the processor 302 includes one or more modules.
  • the one or more modules includes, but not limited to, a receiving unit 310, an updating unit 312, a transmittal unit 314, a checking unit 316, and a deletion unit 318 communicably coupled to each other to delete the PDU session ID during the PDU release.
  • the receiving unit 310 of the system 108 is configured to receive the first PDU session release request message from the UE 102.
  • the first PDU session release request message is included in the first SM container along with the PDU session ID.
  • the first PDU session release request message is at least one of the N1 message type.
  • the updating unit On receiving the first PDU session release request message, the updating unit
  • the 312 updates the received first PDU session release request message.
  • the received first PDU release request message is updated with the indication of the ULI.
  • the updated PDU release request message is included in the second SM container. More specifically, the updated PDU release request message is stored in the second SM container.
  • the updated PDU release request message is at least one of an N2 message type.
  • the N2 message refers to the messages exchanged over the N2 interface.
  • the N2 interface is the communication between the RAN 204 and the AMF 206.
  • the N2 messages carry various types of signaling and control information between the RAN 204 and the AMF 206.
  • the first SM container and the second SM container are transmitted by the transmittal unit 314 to the AMF 206 from the RAN 204.
  • the AMF 206 checks if the PDU session ID is available within each of the first SM container and the second SM container by using the checking unit 316. If the PDU session ID is available in each of the first and the second SM containers, then PDU session is accepted. Alternatively, if the PDU session ID is not available within each of the first and the second SM containers, then the PDU session ID is rejected.
  • the AMF 206 Upon confirming the availability of the PDU session ID within each of the first and the second SM containers, the AMF 206 transmits the update SM request message to the SMF 208.
  • the update SM request message includes each of the first and the second containers and the PDU session ID. Further, the update SM request message is transmitted to the SMF 208 from the AMF 206 by utilizing at least one network protocol connection, such as, the Hypertext Transfer Protocol 2 (HTTP) protocol.
  • HTTP Hypertext Transfer Protocol 2
  • the SMF 208 On receipt of receiving the update SM request message from the AMF 206, the SMF 208 deletes the PDU session using the deletion unit 318.1n particular, at the SMF 208, the PDU session is deleted from the upper function. Thereafter, the update SM response message, i.e., the PDU session release response message along with the first SM container and the second SM container, is transmitted to the AMF 206.
  • the update SM response message i.e., the PDU session release response message along with the first SM container and the second SM container
  • the AMF 206 transmits the PDU session release response message including the first and second SM containers to the RAN 204 by using the transmittal unit 314.
  • the received first SM container includes the PDU session release command
  • the received second SM container includes the PDU session resource release command transfer.
  • the transmittal unit 314 On receiving the PDU session release response message, the transmittal unit 314 transmits the received first SM container including the PDU session release command from the RAN 204 to the UE 102. Further, the transmittal unit 314 transmits the received second SM container from the RAN 204 to the SMF 208 via the AMF 206. The received second SM container includes the PDU session resource release command transfer message. In particular, the RAN 204 will respond to the AMF unit 208 with the second SM container including a PDU session resource release response transfer.
  • the AMF 206 On receiving the PDU session resource release response transfer, the AMF 206 transmits the update SM including the second SM container to the SMF 208. On receipt of the update SM request, the SMF 208 transmits the acknowledgment response to the AMF 206.
  • the transmittal unit 314 transmits the first SM container to the SMF 208 from the UE 102 via the AMF 206.
  • the first SM container includes a message indicating the completion of the PDU session.
  • the deletion unit 318 On receipt of receiving the message indicating the completion of the PDU session, the deletion unit 318 deletes the PDU session ID at the AMF 206. More specifically, on receipt of the PDU session release complete message, the SMF 208 transmits an acknowledgment response to the AMF 206. Upon transmitting the
  • the SMF 208 transmits the notify request to the AMF 206.
  • the notify request is to notify the AMF 206 that the SM context for this PDU session is released. Then the AMF 206 will respond with the acknowledgement response to the notify request to the SMF 208.
  • the notify request notifies that the release of the PDU session ID is successful. Accordingly, the PDU session ID is deleted during the PDU release. By doing so, the system 108 reduces memory space requirement and improves processing speed of the processor 302.
  • FIG. 4 describes a preferred embodiment of the system 108 of FIG. 3, according to various embodiments of the present invention. It is to be noted that the embodiment with respect to FIG. 4 will be explained with respect to the first UE 102a and the system 108 for the purpose of description and illustration and should nowhere be construed as limited to the scope of the present disclosure.
  • each of the first UE 102a the second UE 102b, and the third UE 102c may include an external storage device, a bus, a main memory, a read-only memory, a mass storage device, communication port(s), and a processor.
  • the exemplary embodiment as illustrated in the FIG. 4 will be explained with respect to the first UE 102a.
  • the first UE 102a includes one or more primary processors 402 communicably coupled to the one or more processors 302 of the system 108.
  • the one or more primary processors 402 are coupled with a memory unit 404 storing instructions which are executed by the one or more primary processors 402. Execution of the stored instructions by the one or more primary processors 402 enables the first UE 102a to transmit the first PDU session release request message to the processor 302, and the first SM container to the SMF 208.
  • the one or more processors 302 of the system 108 is configured to delete the PDU session ID using the PDU release.
  • the receiving unit 310 is configured to receive the first PDU session release request message from the one or more applications hosted by the UE 102 and transmitted to the RAN 204.
  • the first PDU session release request message is included in the first SM container along with the PDU session ID.
  • the first PDU session release request message is at least one of the N 1 message type.
  • the system 108 includes the one or more processors 302, the memory 304, the user interface 306, and the database 308.
  • the operations and functions of the one or more processors 302, the memory 304, the user interface 306, and the database 308 are already explained in FIG. 3.
  • a similar description related to the working and operation of the system 108 as illustrated in FIG. 3 has been omitted to avoid repetition.
  • the processor 302 includes the receiving unit 310, the updating unit 312, the transmittal unit 314, the checking unit 316, and the deletion unit 318.
  • the operations and functions of the receiving unit 310, the updating unit 312, the transmittal unit 314, the checking unit 316, and the deletion unit 318 are already explained in FIG. 3.
  • a similar description related to the working and operation of the system 108 as illustrated in FIG. 3 has been omitted to avoid repetition.
  • the limited description provided for the system 108 in FIG. 4 should be read with the description as provided for the system 108 in the FIG. 3 above, and should not be construed as limiting the scope of the present disclosure.
  • FIG. 5 is a flow diagram of a method 500 for deletion of the PDU session ID during the PDU release, according to one or more embodiments of the present invention.
  • the method 500 is described with the embodiments as illustrated in FIG. 3 and should nowhere be construed as limiting the scope of the present disclosure.
  • the method 500 includes the step of receiving the first PDU session release request message from the UE 102 by receiving unit 310.
  • the first PDU session release request message is included in the first SM container along with the PDU session ID.
  • the method 500 includes the step of updating the received first PDU release request message with the indication of the ULI by the updating unit 312.
  • the updated PDU release request message is included in the second SM container.
  • the method 500 includes the step of transmitting the first SM container and the second SM container to the AMF 206 via the RAN 204 using the transmittal unit 314.
  • the method 500 includes the step of checking if the PDU session ID is available within each of the first SM container and the second SM container using the checking unit 316.
  • the method 500 includes the step of transmitting the update SM request message from the AMF 206 to the SMF 208 using the transmittal unit 314.
  • the update SM request message includes each of the first and the second containers and the PDU session ID.
  • the method 500 includes the step of deleting the PDU session at the SMF 208 on receipt of the update SM request message using the deletion unit 318.
  • the PDU session is deleted from the upper function and the response message containing the first SM container and the second SM container is transmitted to the AMF 206.
  • the transmittal unit 314 transmits the first SM container and the second SM container to the RAN 204 from the SMF 208 via the AMF 206.
  • the received first SM container includes the PDU session release command and the second SM container includes the PDU session release command transfer.
  • the transmittal unit 314 is configured to transmit the received first SM container from the RAN 204 to the UE 102 and the received second SM container from the RAN 204 to the SMF 208 via the AMF 206.
  • the transmittal unit 314 Upon transmission of the received first SM container from the RAN 204 to the UE 102, the transmittal unit 314 transmits the first SM container from the UE 102 to the SMF 208 via the AMF 2O6.
  • the first SM container includes a message indicating completion of the PDU session.
  • the deletion unit 318 deleted the PDU session ID at the AMF 206.
  • the present invention further discloses a non-transitory computer-readable medium having stored thereon computer-readable instructions.
  • the computer- readable instructions are executed by the processor 302.
  • the processor 302 is configured to receive the first PDU session release request message from the UE 102.
  • the first PDU session release request message is included in the first SM container along with the PDU session ID.
  • the processor 302 is further configured to update the received first PDU release request message with the indication of the UEI.
  • the updated PDU release request message is included in the second SM container.
  • the processor 302 is further configured to transmit the transmit the first SM container and the second SM container to the AMF 206 via the RAN 204.
  • the processor 302 is further configured to check if the PDU session ID is available within each of the first SM container and the second SM container. Each of the first and the second SM containers are accepted if the PDU session ID is available therein.
  • the processor 302 is further configured to transmit the update SM request message from the AMF 206 to the SMF 208.
  • the update SM request message includes each of the first and the second containers and the PDU session ID.
  • the processor 302 is further configured to delete the PDU session at the SMF 208 on receipt of the update SM request message. The PDU session is deleted from the upper function and the response message containing the first SM container and the second SM container is transmitted to the AMF 206.
  • the present disclosure incorporates technical advancement of optimizing the end transaction part of PDU release procedure. More specifically, by using the present invention the AMF is able to avoid procedure collision or new procedure handling delay or new procedure failure scenarios.
  • the PDU session ID is deleted during the PDU release, thereby reducing memory space requirement, and improving processing speed of the system, which improves user experience of the UE.
  • the present invention offers multiple advantages over the prior art and the above listed are a few examples to emphasize on some of the advantageous features.
  • the listed advantages are to be read in a non-limiting manner.
  • Session Management Function (SMF) - 208

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

Abstract

La présente divulgation concerne un système (108) et un procédé (400) de suppression de l'ID de session PDU Le système (108) comprend une unité de réception (310) destinée à recevoir une première demande de libération de session PDU en provenance d'un UE (102). Le système (108) comprend une unité de mise à jour (312) destinée à mettre à jour le premier message de demande de libération de PDU reçu. Le système (108) comprend une unité de transmission (314) destinée à transmettre les premier et second conteneurs SM à l'AMF (206) par l'intermédiaire du RAN (204). Le système (018) comprend une unité de vérification (316) destinée à vérifier si l'ID de session PDU est disponible à l'intérieur de chacun des premier et second conteneurs SM. Le système (108) comprend l'unité de transmission (314) destiné à transmettre un message de demande SM de mise à jour de l'AMF (206) à la SMF (208). Le système (108) comprend une unité de suppression (318) destinée à supprimer la session PDU au niveau de la SMF (208). Ref.
PCT/IN2024/050929 2023-07-03 2024-06-26 Procédé et système de suppression d'un identifiant de session d'unité de données par paquets (pdu) Pending WO2025008948A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180198867A1 (en) * 2017-01-09 2018-07-12 Huawei Technologies Co., Ltd. System and methods for session management
US20220132454A1 (en) * 2019-03-12 2022-04-28 Lg Electronics Inc. Multi-access protocol data unit session management

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180198867A1 (en) * 2017-01-09 2018-07-12 Huawei Technologies Co., Ltd. System and methods for session management
US20220132454A1 (en) * 2019-03-12 2022-04-28 Lg Electronics Inc. Multi-access protocol data unit session management

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Title
"3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; 5G System; Session Management Services; Stage 3 (Release 15)", 3GPP STANDARD; TECHNICAL SPECIFICATION; 3GPP TS 29.502, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. CT WG4, no. V15.9.0, 25 September 2020 (2020-09-25), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , pages 1 - 150, XP051961065 *

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