5G NF Service Priority Updates for Isolation-Aware Routing
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Solution Overview
Problem
In 5G networks, network function (NF) producers can become isolated from their mates due to hardware failures, software errors, or network configuration issues, leading to service degradation or outage, with current systems failing to promptly detect and address isolation events, resulting in split-brain scenarios and inconsistent recovery.
Innovation Solution
The X-Service-State (XSS) engine dynamically updates service priorities for isolated NF producers by generating an XSS header with a degraded status and validity period, allowing NF consumers to reroute service requests to higher-priority NFs, thereby ensuring reliable and resilient network operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NF producers operate in distributed sets to enhance scalability and flexibility, then network adaptability and resource utilization improve, but the risk of isolation events and service degradation increases
Solution Approach 1:
The patent implements a feedback mechanism where the XSS engine continuously monitors the status of NF producers and dynamically updates service priorities based on real-time isolation detection. When an NF producer becomes isolated, the system detects this state and adjusts routing priorities to redirect traffic away from isolated instances, ensuring service continuity while maintaining the benefits of distributed operation
Solution Approach 2:
The system dynamically adjusts service priorities of NF producers based on their operational status. Instead of static routing, the XSS engine continuously updates priority levels in response to changing network conditions, allowing the system to adapt to isolation events while maintaining optimal service delivery through dynamic priority reassignment
2Ease of operation
If isolated NF producers continue to accept service requests to maintain availability, then service accessibility is preserved, but session loss and service inconsistency occur
Solution Approach 1:
The XSS engine acts as an intermediary between NF consumers and NF producers, intercepting service requests and adjusting routing decisions based on real-time status information. When an NF producer is isolated, the XSS engine mediates by redirecting requests to healthy NF producers, preventing session loss while maintaining service availability through intelligent routing intervention
3Reliability
If the system implements monitoring to detect isolation events, then service reliability improves, but system complexity and detection difficulty increase
Solution Approach 1:
The monitoring system leverages self-service mechanisms where NF producers autonomously report their status and the XSS engine automatically detects isolation events through predefined criteria. This self-reporting approach reduces the complexity of centralized monitoring while maintaining high detection accuracy, as each NF producer independently provides status information without requiring complex external probing mechanisms
Data Source
AI summary
Various embodiments of the present technology generally relate to systems and methods for providing an X-Service-State (XSS) engine that dynamically updates a service priority for network functions (NFs). In an aspect, a method is provided that includes determining, by a first NF producer within a NF set, an isolation event, where the isolation event isolates the first NF producer from at least one other NF producers within the NF set. The method may also include generating, by the first NF producer, a XSS header containing an X-Service (XS) status indicating that the first NF producer is isolated and includes a service priority and a first validity period during which the service priority is applicable. The method may also include transmitting, by the first NF producer, the XSS header to the NF consumer, where responsive to receiving the XSS header the NF consumer uses the service priority for NF selection.