MA PDU Session Steering Rules for BP and UL CL Insertion
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Solution Overview
Problem
The challenge in managing multi-access protocol data unit (MA PDU) sessions involves unclear methods for adjusting access traffic steering, switching, and splitting (ATSSS) rules when a branching point (BP) or uplink classifier (UL CL) is inserted in the data path, particularly in scenarios where user-plane resources are distributed across multiple access networks.
Innovation Solution
The method involves transmitting steering rules to wireless terminals and network nodes to manage uplink data distribution using ATSSS functionality, avoiding multipath transmission control protocol (MPTCP), and adjusting policies when a BP or UL CL is inserted or removed in the MA PDU session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a branching point or uplink classifier is inserted in the data path of an MA PDU session, then traffic distribution control is enhanced, but the complexity of managing ATSSS rules increases
Solution Approach 1:
The patent segments the ATSSS rules into two distinct parts: (1) rules for distributing uplink traffic from the UE to the branching point, and (2) rules for distributing downlink traffic from the branching point to the PDU session. This segmentation allows each part to be managed independently, reducing the overall complexity while maintaining enhanced traffic distribution control through the branching point insertion.
2Adaptability or versatility
If ATSSS rules are dynamically updated when BP/UL CL is inserted or removed, then traffic routing flexibility is improved, but the signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the ATSSS rules in the session management function before the branching point or uplink classifier is actually inserted into the data path. This allows the rules to be ready and waiting, so when the BP/UL CL insertion occurs, the traffic routing can be adjusted immediately without complex real-time signaling and processing, thus maintaining flexibility while reducing overhead.
3Productivity
If steering rules are transmitted to wireless terminals for uplink data distribution, then traffic distribution efficiency is improved, but the network signaling overhead increases
Solution Approach 1:
The patent applies local quality by transmitting steering rules specifically tailored to each wireless terminal's local conditions and requirements. Instead of broadcasting generic rules to all terminals, the network sends customized ATSSS rules that are optimized for each terminal's specific traffic patterns, access network conditions, and service requirements. This improves traffic distribution efficiency for each terminal while minimizing unnecessary signaling overhead by sending only the relevant rules.
Data Source
AI summary
A wireless communication method for use in a session management function is disclosed. The method comprises transmitting, to a wireless terminal, a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session, wherein the multi-access protocol data unit session is associated with the first protocol data unit session anchor and a second protocol data unit session anchor.