Session Continuity via NRF Subscription Profile Registration
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Solution Overview
Problem
Existing interworking systems for 5G and 4G communication systems face inefficiencies in maintaining session continuity during mobility, particularly due to delays in retrieving and notifying session information, which can impact network performance especially in high-speed mobility scenarios.
Innovation Solution
The proposed solution involves a destination subscription manager actively registering a subscription profile in a Network Repository Function (NRF) to facilitate efficient session continuity during mobility. This allows the source subscription manager to proactively send session information to the destination subscription manager, reducing the need for retrieval and notification processes and thereby minimizing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional session information retrieval and notification processes are used during mobility, then session continuity is maintained, but significant time delays occur in UE registration
Solution Approach 1:
The destination subscription manager proactively registers the subscription profile in the NRF before the UE actually moves to the destination core. This preliminary registration ensures that session information is already available and can be immediately retrieved when the UE arrives, eliminating the time delay associated with post-movement registration and notification processes.
Solution Approach 2:
The NRF acts as an intermediary between the source and destination subscription managers. By registering the subscription profile in the NRF, the system creates an intermediate storage point that facilitates efficient session information transfer during mobility, reducing the direct communication overhead between source and destination managers.
2Productivity
If proactive session information transfer is implemented, then registration time is reduced, but system complexity increases
Solution Approach 1:
The NRF serves multiple functions: it acts as a repository for subscription profiles, a notification mechanism for session information, and a coordination point for inter-core mobility. By making the NRF multi-functional, the system avoids adding separate dedicated components for each function, thereby limiting the increase in overall system complexity while achieving proactive session information transfer.
Data Source
AI summary
Examples described herein relate to techniques for session continuity when a User Equipment (UE) is moving to a destination core of a destination communication system in an interworking network architecture. Example techniques may include registering by a destination subscription manager in a Network Repository Function (NRF) a subscription profile and indicating support for a session continuity for the User Equipment (UE). Discovering the subscription profile by a source subscription manager by utilizing the NRF. Receiving the session information by the destination subscription manager from the source subscription manager based on the discovery of the subscription profile. Enabling continuity of the session by the destination subscription based on the received session information.