Policy-Driven Binding Cleanup for Stagnant Wireless Sessions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face inefficiencies in removing session binding data due to session stagnation, leading to stale session data accumulation that reduces the accuracy and performance of the Binding Support Function (BSF) by storing large quantities of outdated information.
Innovation Solution
A method and system for detecting stale sessions, involving a policy controller that sends a policy update request to a session controller, receives a message confirming session termination, and directs a binding data store to delete associated session binding data, ensuring timely cleanup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PCF stores session data for terminated sessions due to SMF failure to notify, then session data can be retained for potential future use, but the BSF accumulates large quantities of stale session bindings reducing accuracy and performance
Solution Approach 1:
The PCF proactively initiates stale session cleanup by detecting session stagnation conditions and automatically deleting stale session data and binding data before it accumulates in the BSF. This preliminary action prevents the BSF from storing large quantities of stale bindings, thereby maintaining data accuracy and improving performance while ensuring reliable session data management.
2Measurement precision
If the PCF deletes session data for stale sessions, then data accuracy is improved, but the complexity of detecting and managing stale sessions increases
Solution Approach 1:
The PCF implements a feedback mechanism where it periodically checks for session stagnation conditions by attempting to retrieve session data from the SMF. When the SMF cannot provide session data within a specified time window, the PCF identifies this as a stale session condition and automatically triggers cleanup. This feedback-based approach maintains data accuracy while managing complexity through automated detection and response.
3Quantity of substance
If the BSF stores large quantities of session binding data, then comprehensive session information is available, but computational performance and system resources are stressed
Solution Approach 1:
The PCF performs preliminary cleanup of stale session data and binding data before they accumulate in the BSF. By detecting session stagnation conditions and deleting associated data proactively, the PCF ensures the BSF maintains only current and relevant binding information. This prevents the BSF from storing large quantities of stale data, thereby maintaining high computational efficiency and avoiding resource stress while preserving comprehensive session information for active sessions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Various embodiments include a wireless communication network that comprises network circuitry. The network circuitry executes a policy controller, session controller, and binding data store. The policy controller detects a stale session condition for a wireless user device and transfers a policy update request to the session controller for a session associated with the user device. The policy controller receives a message from the session controller that indicates the session associated with the user device does not exist. The policy controller deletes session data for the user device in response to the message and directs the binding data store to delete session binding data associated with the user device. The binding data store receives the direction from the policy controller, deletes the session binding data, and transfers an indication that the session binding data is deleted to the policy controller. The policy controller receives the indication from the binding data store.