EP-4740677-A1 - METHOD AND SYSTEM FOR DELETION OF A PACKET DATA UNIT (PDU) SESSION ID

Abstract

The present disclosure relates to a system (108) and a method (400) for deletion of the PDU session ID. The system (108) includes a receiving unit (310) to receive a first PDU session release request from a UE (102). The system (108) includes an updating unit (312) to update the received first PDU release request message. The system (108) includes a transmittal unit (314) to transmit the first and second SM container to the AMF (206) via the RAN (204). The system (018) includes a checking unit (316) to check if the PDU session ID is available within each of the first and second SM container. The system (108) includes the transmittal unit (314) to transmit an update SM request message from the AMF (206) to the SMF (208). The system (108) includes a deletion unit (318) to delete the PDU session at the SMF (208). Ref.

Inventors

• BHATNAGAR, AAYUSH
• BISHT, BIRENDRA
• Singh, Harbinder Pal
• Naskar, Suman
• KUMAR, PRADEEP
• Srinivas, Gunna
• JAIN, SOURABH

Assignees

• Jio Platforms Limited

Dates

Publication Date

20260513

Application Date

20240626

Claims (14)

1. 1. A method (500) for deletion of a Packet Data Unit (PDU) session ID during a PDU release, the method (500) comprises the steps of: receiving, by a processor (302), a first PDU session release request message from a User Equipment (UE) (102), wherein the first PDU session release request message is included in a first Session Management (SM) container along with a PDU session ID; updating, by the processor (302), the received first PDU release request message with an indication of a User Location Information (ULI), wherein the updated PDU release request message is included in a second SM container; transmitting, by the processor (302), the first SM container and the second SM container to an Access and Mobility Management Function (AMF) (206) via a Radio Access Network (RAN) (204); checking, by the processor (302), if the PDU session ID is available within each of the first SM container and the second SM container, wherein each of the first and the second SM containers are accepted if the PDU session ID is available therein; transmitting, by the processor (302), an update SM request message from the AMF (206) to Session Management Function (SMF) (208), the update SM request message includes each of the first and the second containers and the PDU session ID; and deleting, by the processor (302), a PDU session at the SMF (208) on receipt of the update SM request message, wherein 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 (206).
2. 2. The method (500) as claimed in claim 1 , wherein the method comprises the steps of: transmitting, by the processor (302), the first SM container and the second SM container to the RAN (204) from the SMF (208) via the AMF (204), wherein the received first SM container includes a PDU session release command and the second SM container includes a PDU session release command transfer; transmitting, by the processor (302), the received first SM container from the RAN (204) to the UE (102); and transmitting, by the processor (302), the received second SM container from the RAN (204) to the SMF (208) via the AMF (206), wherein the received second SM container includes the PDU session resource release response transfer message.
3. 3. The method (500) as claimed in claim 2, wherein on transmission of the received first SM container from the RAN (204) to the UE (102), the processor (302) is configured to perform the step of: transmitting, the first SM container from the UE (102) to the SMF (208) via the AMF (206), wherein the first SM container includes a message indicating completion of the PDU session; and deleting the PDU session ID at the AMF (206).
4. 4. The method (500) as claimed in claim 1 , wherein the first PDU session release request message is at least one of an N1 message type and the updated PDU release request message is at least one of an N2 message type.
5. 5. The method (500) as claimed in claim 1 , wherein the update SM request message is transmitted to the SMF (208) from the AMF (206) utilizing at least one communication protocol, such as, at least one of a Hypertext Transfer Protocol 2 (HTTP) protocol.
6. 6. The method (500) as claimed in claim 1 , wherein each of the first and the second SM container is a N 1 SM container and a N2 SM container, respectively.
7. 7. A User Equipment (UE) (102), comprising: one or more primary processors (402) coupled with a memory (404), wherein said memory (404) stores instructions which when executed by the one or more primary processors (402) causes the UE (102) to: transmit, a first Packet Data Unit (PDU) session release request message to a processor (402); and transmit, a first Session Management (SM) container to a Session Management Function (SMF), wherein the processor (402) is further configured to perform the method (500) as claimed in claim 1.
8. 8. A system (108) for deletion of a Packet Data Unit (PDU) Session ID during a PDU release, the system (108) comprising: a receiving unit (310) configured to receive, a first PDU session release request message from a User Equipment (UE) (102), wherein the first PDU session release request message is included in a first Session Management (SM) container along with the PDU session ID; an updating unit (312) configured to update, the received first PDU release request message with an indication of a User Location Information (ULI), wherein the updated PDU release request message is included in a second SM container; a transmittal unit (314) configured to transmit, the first SM container and the second SM container to an Access and Mobility Management Function (AMF) (206) via a Radio Access Network (RAN) (204); a checking unit (316) configured to check, if a PDU session ID is available within each of the first SM container and the second SM container, wherein each of the first and the second SM containers are accepted if the PDU session ID is available therein; the transmittal unit (314) configured to transmit, an 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; and a deletion unit (318) configured to delete, a PDU session at the SMF (208) on receipt of the update SM request message, wherein 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 (206).
9. 9. The system (108) as claimed in claim 8, wherein the transmittal unit (314) is configured to: transmit, the first SM container and the second SM container to the RAN (204) from the SMF (208) via the AMF (206), wherein the received first SM container includes the PDU session release command and the second SM container includes the PDU session release command transfer; transmit, the received first SM container from the RAN (204) to the UE (102); and transmit, the received second SM container from the RAN (204) to the SMF (208) via the AMF (206), wherein the received second SM container includes the PDU session resource release response transfer message included therein.
10. 10. The system (108) as claimed in claim 8, wherein, on transmission of the received first SM container from the RAN (204) to the UE (102),: the transmittal unit (314) is configured to transmit, the first SM container from the UE (102) to the SMF (208) via the AMF (206), wherein the first SM container includes a message indicating completion of the PDU session; and the deletion unit (318) is configured to delete, the PDU session ID at the AMF (206).
11. 11. The system (108) as claimed in claim 8, wherein the first PDU session release request message is at least one of an N1 message type and the updated PDU release request message is at least one of an N2 message type.
12. 12. The system (108) as claimed in claim 8, wherein 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.
13. 13. The system (108) as claimed in claim 8, wherein each of the first and the second SM container is a N 1 SM container and a N2 SM container, respectively.
14. 14. A non-transitory computer-readable medium having stored thereon computer- readable instructions that, when executed by a processor, causes the processor (302) to: receive, a first Packet Data Unit (PDU) session release request message from a User Equipment (UE) (102), wherein the first PDU session release request message is included in a first Session Management (SM) container along with the PDU session ID; update, the received first PDU release request message with an indication of a User Location Information (ULI), wherein the updated PDU release request message is included in a second SM container; transmit, the first SM container and the second SM container to an Access and Mobility Management Function (AMF)(206) via a Radio Access Network (RAN) (204); check, by the processor (302), if a PDU session ID is available within each of the first SM container and the second SM container, wherein each of the first and the second SM containers are accepted if the PDU session ID is available therein; transmit, an update SM request message from the AMF (206) to the Session Management Function (SMF) (208), the update SM request message includes each of the first and the second containers and the PDU session ID; and delete, a PDU session at the SMF (208) on receipt of the update SM request message, wherein 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 (206).

Description

METHOD AND SYSTEM FOR DELETION OF A PACKET DATA UNIT (PDU) SESSION ID FIELD OF THE INVENTION [0001] 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. BACKGROUND OF THE INVENTION [0002] Mobile communication systems have traditionally focused on providing voice services. However, with the expansion of mobile communication systems to include data services, there has been a significant increase in traffic, leading to resource constraints. Users now require higher-speed services, necessitating the development of a more advanced mobile communication system. [0003] The requirements for a next-generation mobile communication system are driven by the need to support the explosive growth of data traffic, provide higher transmission rates per user, accommodate a significantly increased number of connection devices, achieve low end-to-end latency, and improve energy efficiency. These demands have led to the development of improved 5G communication systems. [0004] In a 5G communication system, 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. To cater the PDU Establishment request, 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). 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). [0005] Typically, 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. 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. [0006] There is a need for a solution that can complete the PDU Release procedure at the AMF early while waiting for Release Notification message from SMF. As a result, AMF can handle new procedures from UE/Network while in release notification wait state and is able to respond to release notification message received from SMF. By optimizing the end transaction part of PDU Release procedure, AMF is able to avoid procedure collision or new procedure handling delay or new procedure failure scenarios and ultimately improving the UE user experience as underlying 5G core signaling procedure is optimally handled. SUMMARY OF THE INVENTION [0007] 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. [0008] In one aspect of the present invention, the system for deletion of the PDU session ID during a PDU release is disclosed. The system 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 Ac