MA PDU Session Counting for Accurate NSACF Access Tracking
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Solution Overview
Problem
Existing wireless networks face issues in accurately managing multi-access protocol data unit (MA PDU) sessions due to incorrect counting of PDU sessions per network slice, leading to erroneous handling and threshold violations during MA PDU session establishment and release, especially when UEs are registered over multiple access types.
Innovation Solution
Implement methods and entities within the wireless network to determine and manage MA PDU sessions by indicating the session type to the NSACF, allowing the NSACF to accurately increase or decrease counts per access type, and maintain a single count for MA PDU sessions, ensuring correct tracking and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network counts PDU sessions without distinguishing MA PDU session types, then the counting process is simple, but the counting accuracy deteriorates leading to erroneous threshold violations
Solution Approach 1:
The patent segments PDU session counting by access type (3GPP access and non-3GPP access) and by session type (MA PDU session vs. single access PDU session). The NSACF maintains separate counters for different access types and identifies MA PDU sessions through specific indication bits in NAS messages, allowing accurate counting without conflating different session types.
Solution Approach 2:
The patent implements preliminary identification of MA PDU sessions during session establishment. The UE includes an indication bit in the PDU session establishment request message to pre-identify the session type, allowing the network to prepare appropriate counting and management actions before the session becomes active, preventing erroneous threshold violations.
2Reliability
If the network releases MA PDU sessions without maintaining counts per access type, then the release process is simplified, but the session tracking accuracy deteriorates
Solution Approach 1:
The patent segments the release procedure by maintaining separate counters for 3GPP access and non-3GPP access. When an MA PDU session is released, the network identifies which access type is being released and decrements only the corresponding counter, ensuring accurate tracking while allowing independent release of each access type.
Solution Approach 2:
The patent implements feedback mechanisms where the SMF notifies the NSACF about session release events. The NSACF receives feedback about which specific access type is being released and updates its counters accordingly, ensuring reliable session tracking through continuous feedback loops between network entities.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a wireless network and methods to maintain a MA PDU session at a NSACF entity. The method includes determining, by a SMF entity, that a PDU session is the MA PDU session based on an indication from a UE. Further, the method includes indicating, by the SMF entity, that the PDU session is the MA PDU session to the NSACF entity in response to determination. The wireless network may maintain the count accurately even though the PDU session is a MA PDU session.