ATSSS Rule Generation Using Policy-Based Application Descriptors
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Solution Overview
Problem
Current 5G networks lack an accurate method for determining application descriptors in Access Traffic Steering, Switching, and Splitting (ATSSS) rules, which are crucial for managing service data flow across different access technologies.
Innovation Solution
A communication method where a policy control network element determines an application descriptor based on an application identifier and sends it to a session management network element, enabling the generation of precise ATSSS rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a session management network element generates an ATSSS rule without receiving application descriptor information from a policy control network element, then the rule generation process is simple and fast, but the application descriptor determination is inaccurate and unreliable
Solution Approach 1:
The policy control network element performs preliminary action by determining the application descriptor before the session management network element generates the ATSSS rule. This ensures accurate application descriptor information is available when needed, resolving the contradiction between reliability and complexity by preparing the necessary data in advance through a dedicated policy control function.
Solution Approach 2:
The policy control network element acts as an intermediary between the application identifier and the ATSSS rule generation process. It receives the application identifier, determines the corresponding application descriptor, and provides this accurate information to the session management network element, enabling reliable rule generation without requiring the session management element to perform complex determination operations itself.
2Measurement precision
If the policy control network element determines and sends the application descriptor to the session management network element, then the ATSSS rule generation becomes accurate and reliable, but the communication process becomes more complex
Solution Approach 1:
The system segments the ATSSS rule generation process into distinct functional parts: the policy control network element handles application descriptor determination, while the session management network element handles rule generation. This segmentation allows each element to perform its specialized function accurately, improving measurement precision while distributing complexity across multiple specialized components rather than concentrating it in one element.
Data Source
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AI summary
This application provides a communication method, an apparatus, and a system. The method includes: A policy control network element obtains an application identifier, determines a first application descriptor based on the application identifier, and sends the first application descriptor to a session management network element, where the first application descriptor is for generating an ATSSS rule, and the ATSSS rule includes the first application descriptor. Based on this solution, the policy control network element may determine an application descriptor, and send the application descriptor to the session management network element, so that the session management network element may generate the ATSSS rule based on the application descriptor. In this way, the ATSSS rule is accurately generated, and the method is simple and easy to implement.