MA PDU Session Status Indication for 5G Multi-Access
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Solution Overview
Problem
Current 5G New Radio (NR) technology faces challenges in managing multi-access protocol data unit (MA PDU) sessions, particularly in ensuring continuous resource establishment across different access types without premature termination, leading to potential disruptions in user plane connectivity.
Innovation Solution
A method where a User Equipment (UE) registers and establishes MA PDU sessions over multiple access types, sending mobility management signaling to indicate an active state during ongoing establishment, preventing premature resource release and ensuring seamless connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE sends mobility management signaling over the second access during ongoing MA PDU session establishment, then the network is notified of the active state preventing premature resource release, but the signaling complexity and processing overhead increase
Solution Approach 1:
The UE proactively sends mobility management signaling over the second access before the MA PDU session establishment is complete, notifying the network that the session is in an active state. This preliminary action prevents the network from prematurely releasing resources on the second access, ensuring continuous resource availability throughout the establishment process.
2Productivity
If the network releases resources on the second access during ongoing MA PDU session establishment, then resource utilization is optimized, but the user plane connectivity is disrupted
Solution Approach 1:
The UE provides feedback to the network through mobility management signaling, indicating that the MA PDU session is in an active state during establishment. This feedback mechanism prevents the network from incorrectly determining that resources should be released, thereby maintaining user plane connectivity while still allowing for efficient resource management once establishment is complete.
3Device complexity
If the UE waits for complete establishment before sending any signaling, then signaling overhead is reduced, but the establishment process may be terminated prematurely due to resource release
Solution Approach 1:
The UE performs a preliminary signaling action by sending mobility management signaling over the second access during the ongoing establishment process, before completion. This preliminary notification ensures the network maintains resources necessary for establishment completion, while the signaling overhead remains minimized by using existing mobility management procedures rather than introducing new dedicated signaling mechanisms.
Data Source
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AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE performs an establishment of a multi-access protocol data unit, MA PDU, session for a first access and a second access (802). The UE is registered in a same network over the first access and the second access. The UE determines that the establishment is completed for the first access and is ongoing for the second access (806). In response to determining that the establishment is completed for the first access and is ongoing for the second access, the UE sends, over the second access, a mobility management signaling (808). The mobility management signaling includes an indication that the MA PDU session is in a state other than an inactive state during the establishment that is ongoing on the second access.