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EP-4740564-A1 - METHOD AND SYSTEM FOR HANDLING PROTOCOL DATA UNIT RELEASE COMMAND INITIATED FROM SESSION MANAGEMENT FUNCTION

EP4740564A1EP 4740564 A1EP4740564 A1EP 4740564A1EP-4740564-A1

Abstract

The present disclosure relates to method and system for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF) The method comprises receiving, by a transceiver unit at an Access and Mobility Management Function (AMF) from the SMF, the PDU release command, initiating, by a paging unit, a paging message based on the PDU release command; deleting, by a PDU session manager unit, at least a PDU context; detecting, by a detection unit, a response associated with the paging message; receiving, by the transceiver unit, a target request based on the response; transmitting, by the transceiver unit, an accept message, wherein the accept message at least comprises an updated out of sync PDU session status IE (PSS IE); receiving a PDU session establishment request; and establishing, a PDU session based on the PDU session establishment request and the updated out of sync PSS IE.

Inventors

  • BISHT, BIRENDRA
  • BHATNAGAR, AAYUSH
  • BHATNAGAR, PRADEEP KUMAR
  • Singh, Harbinder Pal
  • MISHRA, SOMYA
  • SHARMA, Smridhi
  • GUPTA, AMIT KUMAR
  • Bhatt, Naresh
  • Bansal, Amrish

Assignees

  • Jio Platforms Limited

Dates

Publication Date
20260513
Application Date
20240612

Claims (13)

  1. 1. A method [300] for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF), the method comprising: - receiving, by a transceiver unit [302] at an Access and Mobility Management Function (AMF) from the SMF, the Protocol Data Unit (PDU) release command associated with a PDU, wherein the PDU release command comprises at least a PDU session ID associated with the PDU; - initiating, by a paging unit [304] at the AMF to a radio access network (RAN) node, a paging message based on the PDU release command; - deleting, by a PDU session manager unit [306], at least a PDU context associated with the PDU session ID based on the paging message; - detecting, by a detection unit [308] at the AMF from a user equipment (UE), a response associated with the paging message, wherein the response is one of a positive response and a negative response; - receiving, by the transceiver unit [302] at the AMF from the UE, a target request based on the response; - transmitting, by the transceiver unit [302] at the AMF to the UE, an accept message associated with the target request, wherein the accept message at least comprises an updated out of sync PDU session status IE (PSS IE); - receiving, by the transceiver unit [302] at the AMF from the UE, a PDU session establishment request based on the accept message; and - establishing, by the PDU session manager unit [306] at the AMF, a PDU session based on the PDU session establishment request and the updated out of sync PSS IE.
  2. 2. The method as claimed in claim 1, wherein the method further comprising: - receiving, by the transceiver unit [302] at the AMF from the Radio access network (RAN) node, a UE context release request associated with the user equipment (UE); - configuring, by the PDU session manager unit [306] at the AMF, a UE idle state associated with the UE based on the UE context release request; and - detecting, by the PDU session manager unit [306] via the SMF, an error in the UE idle state associated with the at least one PDU.
  3. 3. The method as claimed in claim 1, wherein the target request associated with a network is at least one of a mobility request associated with the network, a periodic request associated with the network, a service request associated with the network.
  4. 4. The method as claimed in claim 1, wherein the positive response is detected by the detection unit [308] in an event wherein the response associated with the paging message is successfully received from the UE at the AMF, and the negative response is detected by the detection unit [308] in an event wherein the response associated with the paging message is unsuccessfully received from the UE at the AMF.
  5. 5. The method as claimed in claim 1, wherein the establishing by the PDU session manager unit [306], the PDU session based on the PDU session establishment request and the updated out of sync PSS IE in an event the negative response is detected further comprises: • synchronising the UE and at least a target PDU session ID associated with a target PDU session, and wherein synchronising the UE and the target PDU session ID is based on at least one of initiating a Mobile Originated (MO) trigger at the AMF and receiving a Mobile Terminated (MT) date at the AMF.
  6. 6. The method as claimed in claim 5, wherein the establishing by the PDU session manager unit [306], the PDU session based on the PDU session establishment request and the updated out of sync PSS IE in an event the negative response is detected further comprises: • receiving at the AMF from the SMF a Downlink Data Notification (DDN) associated with the target PDU session ID, and initiating from the AMF to the UE the paging message based on receiving the DDN.
  7. 7. A system for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF), the system comprises: o a transceiver unit [302] at an Access and Mobility Management Function (AMF) configured to receive from the SMF, the PDU release command associated with a PDU, wherein the PDU release command comprises at least a PDU session ID associated with the PDU; o a paging unit [304] at the AMF, connected to at least the transceiver unit [302], the paging unit [304] configured to initiate to a radio access network (RAN) node, a paging message based on the PDU release command; o a PDU session manager unit [306] at the AMF, connected to at least the paging unit [304], the PDU session manager unit [306] configured to delete at least a PDU context associated with the PDU session ID based on the paging message; o a detection unit [308] at the AMF, connected to at least the PDU session manager unit [306], the detection unit [308] is configured to detect, at the AMF from a user equipment (UE), a response associated with the paging message, wherein the response is one of a positive response and a negative response; wherein the transceiver unit [302] is further configured to: • receive, at the AMF from the UE, a target request associated with the network based on the response; • transmit, from the AMF to the UE, an accept message associated with the target request, wherein the accept message at least comprises an updated out of sync PDU session status IE (PSS IE); • receive, at the AMF from the UE, a PDU session establishment request based on the accept message; and wherein the PDU session manager unit [306] is further configured to: • establish, at the AMF, a PDU session based on the PDU session establishment request and the updated out of sync PSS IE.
  8. 8. The system as claimed in claim 7 wherein the system further comprising: - the transceiver unit [302] is further configured to receive from the Radio access network (RAN) node, a UE context release request associated with the user equipment (UE); - the PDU session manager unit [306] is further configured to configure a UE idle state associated with the UE based on the UE context release request; and - the PDU session manager unit [306] is further configured to detect via the SMF, an error in the UE idle state associated with the at least one PDU.
  9. 9. The system as claimed in claim 7, wherein the target request associated with the network is at least one of a mobility request associated with the network, a periodic request associated with the network, a service request associated with the network.
  10. 10. The system as claimed in claim 7, wherein the positive response is detected by detection unit [308] in an event wherein the response associated with the paging message is successfully received from the UE at the AMF, and the negative response is detected by the detection unit [308] in an event wherein the response associated with the paging message is unsuccessfully received from the UE at the AMF.
  11. 11. The system as claimed in claim 7, wherein the PDU session manager unit [306] configured to establish the PDU session based on the PDU session establishment request and the updated out of sync PSS IE in an event the negative response is detected further comprises the PDU session manager unit [306] configured to synchronise the UE and at least a target PDU session ID associated with a target PDU session, and wherein the UE and the target PDU session IDis synchronised based on at least one of a Mobile Originated (MO) trigger initiated at the AMF, and a Mobile Terminated (MT) date received at the AMF.
  12. 12. The system as claimed in claim 11, wherein the PDU session manager unit [306] is configured to establish the PDU session based on the PDU session establishment request and the updated out of sync PSS IE in an event the negative response is detected further comprises at least the PDU session manager unit [306] configured to receive at the AMF from the SMF a Downlink Data Notification (DDN) associated with the target PDU session ID, and the paging unit [304] configured to initiate from the AMF to the UE the paging message based on receiving the DDN.
  13. 13. A non-transitory computer readable storage medium storing instruction for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF), the instructions include an executable code which, when executed by one or more units of the system, may cause: a transceiver unit [302] of the system at an Access and Mobility Management Function (AMF) to receive from the SMF, the PDU release command associated with a PDU, wherein the PDU release command comprises at least a PDU session ID associated with the PDU; a paging unit [304] of the system at the AMF, to initiate to a radio access network (RAN) node, a paging message based on the PDU release command; a PDU session manager unit [306] of the system at the AMF, to delete at least a PDU context associated with the PDU session ID based on the paging message; a detection unit [308] of the system at the AMF, to detect, at the AMF from a user equipment (UE), a response associated with the paging message, wherein the response is one of a positive response and a negative response; the transceiver unit [302] to: receive, at the AMF from the UE, a target request associated with the network based on the response, transmit, from the AMF to the UE, an accept message associated with the target request, wherein the accept message at least comprises an updated out of sync PDU session status IE (PSS IE), and receive, at the AMF from the UE, a PDU session establishment request based on the accept message; and the PDU session manager unit [306] to establish, at the AMF, a PDU session based on the PDU session establishment request and the updated out of sync PSS IE.

Description

METHOD AND SYSTEM FOR HANDLING PROTOCOL DATA UNIT RELEASE COMMAND INITIATED FROM SESSION MANAGEMENT FUNCTION FIELD OF THE DISCLOSURE [001] The present disclosure relates generally to the field of wireless communication systems. More particularly, the present disclosure relates to methods and systems for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF). BACKGROUND [002] The following description of related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain aspects of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section be used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of prior art. [003] Wireless communication technology has rapidly evolved over the past few decades, with each generation bringing significant improvements and advancements. The first generation of wireless communication technology was based on analog technology and offered only voice services. However, with the advent of the second-generation (2G) technology, digital communication and data services became possible, and text messaging was introduced. The third generation (3G) technology marked the introduction of high-speed internet access, mobile video calling, and location-based services. The fourth generation (4G) technology revolutionized wireless communication with faster data speeds, better network coverage, and improved security. Currently, the fifth generation (5G) technology is being deployed, promising even faster data speeds, low latency, and the ability to connect multiple devices simultaneously. With each generation, wireless communication technology has become more advanced, sophisticated, and capable of delivering more services to its users. [004] In telecommunications, as a mobile device transitions between plurality of states such as a network connected state and a network idle state, it's crucial for a network to adapt accordingly. When a User Equipment (UE) is in an idle mode, it conserves resources by minimizing its interactions with the network. However, despite being idle, the UE may still need to be responsive to network commands or events. [005] In scenarios where a Session Management Function (SMF) identifies the need to release certain Protocol Data Unit (PDU), such as in cases of errors or network optimization, it initiates the release process, which also involve releasing of one or more resources to alleviate a network congestion, resolving network errors, or adjusting network configurations. Further an Access and Mobility Management Function (AMF) assists in storing and managing a PDU-Release N1N2 (Non-access Stratum Signaling Connection Setup) message during the UE's idle state serves two primary purposes. Firstly, it ensures that critical network commands, such as PDU releases, are not lost or ignored while the UE is inactive. Secondly, by initiating paging towards the Radio Access Network (RAN) to wake up the UE, the network minimizes delays in executing essential commands, ensuring timely responsiveness. [006] Upon the UE's transition back to a connected state in response to paging, the network swiftly resumes communication, delivering the pending PDU release message. This approach optimizes network efficiency by allowing the UE to seamlessly transition between states while maintaining responsiveness to network commands. However, the storing of the PDU-Release message by the AMF consumes memory space, thereby posing scalability challenges and potential resource strain, while also failing to entirely mitigate the need for additional signaling, as paging to awaken the UE still incurs signaling overhead. Also, the accumulation of stored messages over time may exacerbate memory management issues may impact network reliability and responsiveness. [007] Thus, there exists an imperative need in the art to provide a solution that optimise handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF). OBJECTS OF THE INVENTION [008] Some of the objects of the present disclosure, which at least one embodiment disclosed herein satisfies are listed herein below. [009] It is an object of the present disclosure to provide a system and a method for handling a Protocol Data Unit (PDU) release command initiated from a Session Management Function (SMF). [010] It is another object of the present disclosure to provide a system and method to reduce a memory consumption within the Access and Mobility Management Function (AMF) by eliminating a need to store one or more release messages, thereby improving the scalability and efficiency of the network infrastructure. [Oi l] It is another object of the present disclosure to provide a system and method for ensuring seamless re-establishment of PDU sessions that were previously ma