UE Route Selection Policy Detection via UPF Packet Matching
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Solution Overview
Problem
Existing technologies lack a solution for detecting whether a User Equipment (UE) correctly executes User Equipment Route Selection Policy (URSP) rules delivered by the network side.
Innovation Solution
A method is provided to determine whether a UE correctly executes URSP rules by obtaining Policy Section Identifier (PSI) information, generating a packet detection rule, and configuring it to a User Plane Function (UPF) network element to detect whether the target service flow matches the rule, with detection results being received and analyzed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URSP rules are delivered to UE by network side, then route selection policy is established, but there is no solution for detecting whether the URSP rule is correctly executed by the UE
Solution Approach 1:
The patent implements a feedback mechanism where the network side sends detection requests to the UPF, which forwards packets to the UE and receives response packets back. The UPF analyzes these response packets to determine whether the UE correctly executed the URSP rule, providing feedback information to the network side about rule execution status.
Solution Approach 2:
The UPF acts as an intermediary between the network side and the UE. It receives packet detection requests from the network, forwards packets to the UE for processing, collects response packets, and analyzes them to determine rule execution status, thereby mediating the detection process without directly involving the UE in the detection mechanism.
2Measurement precision
If packet detection rules are configured to UPF to detect service flow matching, then URSP rule execution can be verified, but additional detection mechanisms and network elements are required
Solution Approach 1:
The UPF is utilized for multiple functions: it serves as the user plane function for data transmission, the packet detection rule configuration point for URSP verification, and the analysis node for determining rule execution status. By making the UPF multi-functional, the patent avoids adding separate dedicated detection devices while still achieving precise measurement of URSP rule execution.
Data Source
AI summary
A user equipment (UE) route selection policy (URSP) detection method including obtaining first policy section identifier (PSI) information corresponding to a first URSP rule corresponding to a target user equipment, the first URSP rule being matched with a target service flow corresponding to the target user equipment, generating a first packet detection rule based on the first URSP rule that corresponds to the first PSI information, configuring the first packet detection rule to a user plane function (UPF) network element of a first protocol data unit (PDU) session, the first PDU session corresponding to the first URSP rule, and receiving, from the UPF network elements, a first detection result based on the first packet detection rule and indicating whether the target service flow associated with the first PDU session matches the first packet detection rule.