5G Session Revalidation via PCF-BSF Periodic Binding Updates
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Solution Overview
Problem
In 5G communication networks, the Binding Support Function (BSF) lacks a reliable mechanism to determine the validity of PDU and UE sessions, leading to the accumulation of stale binding records that waste resources and cause performance degradation.
Innovation Solution
Implementing a Policy Control Function (PCF) system that sends periodic update requests to the BSF to refresh the revalidation time value for 5G communication sessions, using a revalidation time attribute to ensure the validity of sessions is maintained, and deleting stale records.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BSF stores binding records for all 5G sessions (PDU and UE sessions), then the BSF can maintain session information for network operations, but stale binding records accumulate and cause resource waste and performance degradation
Solution Approach 1:
The patent implements periodic revalidation requests where the BSF sends periodic validation requests to the PCF to check if session bindings are still active. This periodic action allows the system to maintain accurate session information while automatically identifying and cleaning up stale records, thus preventing resource waste and performance degradation without compromising session management reliability.
2Reliability
If the BSF periodically checks session validity, then stale records can be identified and removed, but the BSF lacks a defined procedure to determine session validity under 3GPP specifications
Solution Approach 1:
The patent introduces a revalidation mechanism where the BSF acts as an intermediary that periodically queries the PCF to determine session validity. The PCF responds with validation results indicating whether session bindings are active or stale. This intermediary validation approach provides a standardized procedure for the BSF to detect stale records without requiring complex local validation logic, thus improving reliability while managing complexity.
3Measurement precision
If the BSF maintains accurate session information, then resource allocation and network operations can be optimized, but there is no mechanism to detect when sessions become stale and clean up bindings
Solution Approach 1:
The patent implements a feedback mechanism where the BSF periodically receives validation responses from the PCF regarding session status. Based on this feedback, the BSF can identify stale bindings and initiate cleanup operations. This continuous feedback loop ensures accurate session status monitoring while enabling timely detection and removal of stale records, thus maintaining measurement precision without excessive time loss.
Data Source
AI summary
Various embodiments of the present technology generally relate to systems and methods for validating 5G sessions by providing periodic updates from a policy control function (PCF) to a binding support function (BSF). In certain embodiments, a PCF system may comprise one or more processors, and a memory having stored thereon instructions. The instructions, upon execution, may cause the one or more processors to send a binding record request to a Binding Support Function (BSF) for a 5G communication session associated with the PCF, receive a binding record confirmation with a selected revalidation time value that indicates when the 5G communication session will be considered invalid and a binding record associated with the 5G communication session will be deleted, and prior to an expiration of the selected revalidation time value, send a binding record update request to the BSF to refresh the selected revalidation time value.