Redundancy Group Switchover With Staged Subscriber Session Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network systems face delays and resource constraints during switchover due to the restoration of full subscriber session states in oversubscribed backup user plane network devices, leading to increased latency and potential hardware resource limitations.
Innovation Solution
Implementing a method where backup user plane network devices transition subscriber sessions to a warm forwarding state initially, followed by selective transition to an active state based on resource availability and priority, allowing incremental restoration of full forwarding states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backup user plane network device restores full subscriber session states during switchover, then service reliability is improved, but transition time increases and hardware resources are exhausted
Solution Approach 1:
The patent segments subscriber sessions into different priority groups (high-priority and low-priority sessions) and processes them in stages. High-priority sessions are restored first to critical services, while low-priority sessions are restored subsequently. This segmentation allows the system to achieve essential service reliability quickly without requiring complete restoration of all sessions simultaneously, thereby reducing overall transition time while maintaining critical service continuity.
2Reliability
If the backup user plane network device restores full subscriber session states during switchover, then service reliability is improved, but hardware resource constraints are worsened
Solution Approach 1:
The patent divides subscriber sessions into priority-based segments, restoring only high-priority sessions initially to critical services. This segmentation strategy ensures that limited hardware resources are concentrated on maintaining essential services rather than being distributed across all sessions simultaneously, preventing resource exhaustion while preserving service reliability for critical operations.
Solution Approach 2:
The patent implements partial restoration action by restoring only the necessary high-priority subscriber sessions during the initial switchover phase, rather than restoring all sessions completely. This partial action approach provides sufficient service reliability for critical operations without the resource burden of complete restoration, and allows gradual restoration of remaining sessions as resources become available.
3Reliability
If the backup user plane network device processes all subscriber sessions simultaneously during switchover, then service completeness is improved, but transition time and resource consumption increase
Solution Approach 1:
The patent segments the processing of subscriber sessions into priority-based batches, with high-priority sessions processed first in the initial phase and low-priority sessions processed subsequently. This segmented processing approach maintains service completeness by ensuring all sessions are eventually restored, while significantly improving transition efficiency by focusing computational resources on critical services first rather than processing all sessions simultaneously.
Data Source
AI summary
In some implementations, a network device may receive an indication of a switchover for a subscriber group that contains subsets of subscriber sessions. The network device may transition each subset of the subscriber sessions to a state associated with traffic forwarding. The network device may selectively transition each subset of the subscriber sessions from the state associated with the traffic forwarding to a state associated with traffic services.