URSP Determination via Banned Application Filtering
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Solution Overview
Problem
Current user policy association establishment procedures in mobile communication technologies result in unnecessary signaling overheads due to the need for continuous updates of user route selection policies (URSPs) on terminal devices, even when these policies are not needed.
Innovation Solution
A communication method and system that allows a policy control network element to determine a proper URSP for a terminal device by considering information reported by the terminal device, such as banned application identifiers or policies, thereby reducing unnecessary signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device reports all locally stored PSIs and the policy control network element continuously updates URSPs to ensure they are up to date, then the URSP on the terminal device is maintained to be up to date, but unnecessary signaling overheads are caused
Solution Approach 1:
The patent extracts and removes unnecessary URSP updates by introducing the concept of banned application identifiers. The terminal device identifies applications that do not need URSP services and reports their identifiers to the network. The policy control network element then excludes these banned applications from URSP update operations, thereby eliminating unnecessary signaling overhead while maintaining URSP freshness for actually needed applications.
Solution Approach 2:
Instead of continuously updating all URSPs for all applications (excessive action), the patent applies partial action by selectively updating only those URSPs corresponding to non-banned applications. The terminal device and network element collaborate to identify which applications require URSP maintenance, performing updates only where necessary rather than universally.
2Measurement precision
If the policy control network element continuously updates URSPs for all applications to ensure they are up to date, then the URSP accuracy is maintained, but the signaling overhead increases
Solution Approach 1:
The patent extracts unnecessary URSP update operations by identifying and removing banned application identifiers from the update process. The terminal device reports which applications should be excluded from URSP maintenance, and the policy control network element selectively applies updates only to relevant applications, thereby reducing signaling quantity while preserving accuracy for needed services.
Solution Approach 2:
The patent changes the parameter of URSP update scope by introducing banned application identifiers as a filtering criterion. Instead of updating all URSPs unconditionally, the system modifies the update parameter to exclude specific applications identified as banned, thereby reducing the quantity of signaling operations while maintaining precision for remaining applications.
3Loss of information
If the terminal device reports all PSIs carried by it, then the policy control network element can determine URSP availability, but the quantity of reported PSIs is far greater than actually required
Solution Approach 1:
The patent extracts unnecessary PSI reporting by introducing banned application identifiers. Instead of reporting all PSIs carried by the terminal device, the system identifies and excludes PSIs corresponding to banned applications from the reporting process. This reduces the quantity of reported information while maintaining completeness for actually needed applications.
Solution Approach 2:
The patent applies partial action by reporting only the necessary subset of PSIs rather than all carried PSIs. The terminal device identifies which PSIs are actually needed based on installed and required applications, and reports only those along with banned application identifiers, thereby providing sufficient information for URSP determination without excessive reporting.
Data Source
AI summary
In a communication method, a policy control network element receives first information from a terminal device, where the first information is a banned application identifier, a banned PSI, a URSP identifier, or an allowed application identifier. The policy control network element obtains a first URSP of the terminal device from a data storage network element. The policy control network element determines a second URSP of the terminal device based on the first information and the first URSP. Based on this solution, when deciding a URSP of the terminal device, the policy control network element considers the first information reported by the terminal device, so that a proper URSP can be determined for the terminal device. In addition, this helps avoid signaling overheads caused because the terminal device and a policy control network element side continuously update and maintain a URSP that the terminal device does not need to use.