ATSSS Application Descriptor Routing for Accurate Rule Generation
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Solution Overview
Problem
Current 5G networks lack a solution for accurately determining application descriptors in Access Traffic Steering, Switching, and Splitting (ATSSS) rules, which are crucial for controlling service data flow across 3GPP and non-3GPP access technologies.
Innovation Solution
A communication method where a policy control network element determines and sends an application descriptor to a session management network element, enabling the generation of accurate ATSSS rules by incorporating operating system identification information and application identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the session management network element generates the ATSSS rule without receiving application descriptor from policy control network element, then the rule generation process is simple and fast, but the application descriptor in the ATSSS rule cannot be accurately determined
Solution Approach 1:
The policy control network element acts as an intermediary between the session management network element and the application descriptor information. It receives application identifier from the session management network element, determines the corresponding application descriptor, and then provides it back to the session management network element for ATSSS rule generation, thereby enabling accurate descriptor determination without making the session management element itself complex
Solution Approach 2:
The ATSSS rule generation process is segmented into distinct functional modules: the session management network element handles rule structure and access technology selection, while the policy control network element handles application descriptor determination. This segmentation allows each element to specialize in its core function, improving overall accuracy without proportionally increasing complexity
2Reliability
If the policy control network element determines and sends application descriptor to session management network element, then the ATSSS rule is accurately generated, but the communication process becomes more complex
Solution Approach 1:
The policy control network element performs preliminary determination of the application descriptor before the session management network element generates the ATSSS rule. By preparing the application descriptor in advance and providing it to the session management element, the reliability of rule generation is improved while the actual rule generation process remains straightforward
Solution Approach 2:
A feedback mechanism is established where the session management network element sends the application identifier to the policy control network element, which then returns the determined application descriptor. This feedback loop ensures accurate information exchange while maintaining clear separation of responsibilities between network elements
Data Source
AI summary
A communication method includes obtaining, by a policy control network element, an application identifier. The communication method further includes determining, by the policy control network element, a first application descriptor based on the application identifier. The communication method further includes sending, by the policy control network element, the first application descriptor to a session management network element. The first application descriptor is useable for generating an access traffic steering, switching, and splitting (ATSSS) rule. The ATSSS rule includes the first application descriptor.