Session Continuity Policy Control for Application Requirements
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Solution Overview
Problem
Current user equipment policies do not adequately consider the continuity requirements of applications, leading to suboptimal session reuse or establishment, which negatively impacts user experience by not meeting the service continuity needs of applications.
Innovation Solution
A method where a policy control function network element receives continuity requirements from an application function network element and sends appropriate policy information to user equipment, determining whether to reuse or establish a session based on Service Continuity (SSC) modes, ensuring that the session meets the application's continuity needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If user equipment determines session reuse or establishment based on user equipment policy without considering application continuity requirements, then session processing is simplified, but the session may not meet the application's continuity needs, reducing user experience
Solution Approach 1:
The AF network element provides the continuity requirement of the APP to the PCF network element in advance, before the user equipment performs session determination. This allows the policy information to be pre-configured with the correct SSC mode that matches the application's continuity needs, so when the user equipment makes its decision, it already has the appropriate criteria without needing to perform additional real-time analysis.
Solution Approach 2:
The PCF network element acts as an intermediary between the AF network element and the user equipment. It receives the continuity requirement from the AF, processes it to determine the appropriate SSC mode, and then formulates policy information that the user equipment can directly use for session determination. This mediator ensures that the application's specific continuity needs are accurately translated into actionable policy rules.
2Device complexity
If the user equipment uses a fixed SSC mode from user equipment policy for all applications, then policy management is simplified, but applications with different continuity requirements cannot be properly served
Solution Approach 1:
Instead of using a single fixed SSC mode for all applications, the system provides different SSC modes tailored to different applications based on their specific continuity requirements. The PCF network element formulates policy information with SSC modes that are locally optimized for each application's needs, such as SSC mode 1 for applications requiring high continuity and other modes for applications with different requirements.
Solution Approach 2:
The SSC mode in the policy information is made dynamic rather than static. The PCF network element can update and adjust the SSC mode in the policy information based on the specific continuity requirements of different applications. This allows the system to adapt to varying application needs while maintaining a unified policy management framework.
Data Source
AI summary
This disclosure provides session processing methods and apparatuses. In an implementation, a method comprises receiving, from an application function apparatus, a request that comprises a continuity requirement of an application indicating whether a service of the application needs to remain uninterrupted for a user equipment when the user equipment moves, determining, for the application, a session and service continuity mode that satisfies the continuity requirement of the application, and sending policy information that comprises the session and service continuity mode.