URSP Rule Provisioning for Non-Subscribed SNPN Access
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Solution Overview
Problem
The existing methods for provisioning and handling UE Route Selection Policy (URSP) rules are unclear when a UE accesses a non-subscribed Stand-alone Non-public Network (SNPN) using credentials from a Credentials Holder (CH), leading to uncertainty in establishing PDU sessions for services.
Innovation Solution
A method is provided where a UE registers to a non-subscribed SNPN using credentials from a CH, checks for and stores URSP rules signaled by the SNPN, and applies them in priority order for PDU session establishment, ensuring proper routing of traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE accesses a non-subscribed SNPN using credentials from a CH, then the UE can access services in the SNPN, but it is unclear how to provision and apply URSP rules for PDU session establishment
Solution Approach 1:
The patent applies preliminary action by having the UE obtain and store URSP rules from the SNPN during the registration process, before PDU session establishment is needed. The UE proactively retrieves the rules and stores them in memory, so that when PDU session establishment occurs later, the rules are already available for immediate application, eliminating the uncertainty about rule provisioning.
2Adaptability or versatility
If the UE stores and applies multiple sets of URSP rules from different networks, then the UE can maintain connectivity to multiple networks, but the priority order for rule application becomes ambiguous
Solution Approach 1:
The patent applies local quality by assigning different priority levels to URSP rules based on their source network. Rules from the currently registered SNPN are given higher priority than rules from the home network. This creates a clear local distinction in rule quality/priority, allowing the UE to automatically select the appropriate rules based on current registration status without complex manual configuration.
Data Source
AI summary
A method of provisioning UE Route Selection Policy (URSP) rules received from a non-subscribed Stand-alone Non-public Network (SNPN) registered using credentials from a credentials holder (CH) is provided. After a UE register to the non-subscribed SNPN using credentials from the CH, the UE may establish a PDU session for accessing services n the SNPN. Prior to establishing the PDU session, the UE checks the corresponding URSP rules that can be used in the SNPN. If the UE is signaled with URSP rules by the registered non-subscribed. SNPN, UE should store the URSP rules and then apply those URSP rules for PDU session establishment when the UE access the services in the non-subscribed SNPN.