Packet Routing Node Status Feedback for Fast Session Migration
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Solution Overview
Problem
In cellular networks, if a packet routing node becomes unavailable, existing systems continue to assign it to other user equipment (UEs), leading to delays and degraded experiences due to inefficient handling of data traffic.
Innovation Solution
A session management node determines the availability of packet routing nodes by monitoring their performance with a network repository, and upon detecting unavailability, switches the data traffic session to an available alternate node, ensuring timely and reliable data handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the session management node continues to assign the packet routing node to handle UE data traffic even when it becomes unavailable, then the session management node maintains simple assignment logic, but the data traffic handling reliability deteriorates due to delays and degraded user experience
Solution Approach 1:
The packet routing node provides feedback to the network repository about its availability status. The network repository maintains updated availability information and makes it accessible to the session management node, enabling reliable session assignment without complex direct monitoring
Solution Approach 2:
The network repository acts as an intermediary between the packet routing node and the session management node. It collects availability status from packet routing nodes and provides this information to the session management node, simplifying the session management node's task while ensuring reliable assignment
2Reliability
If the session management node monitors packet routing node availability in real-time, then the data traffic handling reliability improves, but the system complexity and resource consumption increase
Solution Approach 1:
The packet routing node autonomously reports its own availability status to the network repository without requiring active monitoring or polling by the session management node. This self-service approach ensures accurate availability information while minimizing system complexity and resource consumption
3Loss of time
If the session management node waits for timeout periods to detect packet routing node unavailability, then the system operation simplicity is maintained, but the loss of time increases due to delayed session migration
Solution Approach 1:
The packet routing node proactively reports its availability status to the network repository before becoming completely unavailable. This preliminary action allows the session management node to detect unavailability immediately and migrate sessions without waiting for timeout periods, reducing time loss and maintaining high productivity
Data Source
AI summary
A solution for establishing a data traffic session for a user equipment (UE) on a network (e.g., a 4G or 5G cellular network) includes: receiving, by a session management node, from the UE, a request to set up the data traffic session; establishing the data traffic session with a first packet routing node; receiving, by the session management node, from a network repository or the first packet routing node, an indication of unavailability of the first packet routing node to handle UE data traffic; and based on at least a status of the first packet routing node changing from available to handle UE data traffic to unavailable to handle UE data traffic, moving the data traffic session to the available alternate packet routing node.