PDU Session Continuity via Non-Integrated Access Fallback
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Solution Overview
Problem
Existing wireless communication systems face challenges in establishing protocol data unit sessions when integrated access is unavailable or unused, leading to inefficiencies and disruptions in communication.
Innovation Solution
The system enables communication via a non-integrated access by allowing user equipment (UE) to establish connections with a user plane function (UPF) using a second access different from the first access, with rules and timers managing these connections to ensure seamless communication when integrated access is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integrated access is used for PDU session establishment, then communication reliability is improved, but system flexibility deteriorates when integrated access is unavailable
Solution Approach 1:
The system dynamically switches between integrated and non-integrated access modes based on availability. The UE can transition from using only integrated access to using non-integrated access when integrated access is unavailable, making the communication system adaptive to changing network conditions while maintaining reliability through fallback mechanisms.
Solution Approach 2:
The network introduces an intermediary mechanism (non-integrated access) that mediates between the UE and the network when the primary integrated access fails. This intermediary path allows PDU sessions to be established and maintained through alternative routes, ensuring continuous communication while preserving the flexibility to use integrated access when available.
2Adaptability or versatility
If non-integrated access is established for PDU sessions, then system flexibility is improved, but connection management complexity increases
Solution Approach 1:
The connection management is segmented into distinct integrated and non-integrated access paths. Each path has its own establishment, maintenance, and termination procedures. This segmentation allows the system to manage non-integrated access connections independently from integrated access, reducing the overall complexity by dividing the management task into manageable segments rather than handling all access types uniformly.
3Adaptability or versatility
If multiple access types are supported simultaneously, then adaptability is improved, but resource allocation complexity increases
Solution Approach 1:
The system applies local quality by treating integrated and non-integrated access resources differently in their respective domains. Each access type has its own resource allocation mechanisms and policies applied locally, rather than attempting to uniformly manage all resources. This allows the system to support multiple access types while reducing overall complexity by applying specialized management to each access type where needed.
Data Source
AI summary
Methods, systems, and devices for wireless communications using a protocol data unit (PDU) session over a non-integrated access when an integrated access is unavailable or unused are described. In some examples, a UE may transmit a request to establish a PDU session for communications between the UE and a network function. The PDU session may include a first access that is integrated in a network and a second access that is non-integrated in the network, or may only include the second access. The UE and the network function may communicate via the second access in accordance with communication rules. In some examples, the rules may indicate behavior for the UE and the network function over the second access when the first access is unavailable at the UE. In some other examples, the rules may indicate behavior for the UE and the network function when only using the second access.