URSP Rule Handling for Redundant PDU Session Compatibility
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Solution Overview
Problem
Existing network systems struggle to manage terminals that do not support PDU session pair IDs and those that do, necessitating improved methods for comprehensive PDU session management.
Innovation Solution
The network creates and transmits User Route Selection Policy (URSP) rules for terminals with and without PDU session pair ID support, enabling integrated management of redundant PDU sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network creates separate URSP rules for terminals with and without PDU session pair ID support, then comprehensive terminal management is improved, but device complexity increases
Solution Approach 1:
The patent segments terminal management into two distinct categories: terminals with PDU session pair ID support and terminals without PDU session pair ID support. Separate URSP rules are created for each segment, allowing the network to handle different terminal types with appropriate management strategies while maintaining overall system compatibility
Solution Approach 2:
The patent creates a universal URSP rule structure that can accommodate both terminal types. The network configures multiple URSP rules with different characteristics (some with PDU session pair ID, some without) that collectively serve all terminal types, making the system universally applicable to diverse terminal capabilities
2Reliability
If redundant PDU sessions are established for terminals without PDU session pair ID support, then service reliability is improved, but network resource consumption increases
Solution Approach 1:
The patent changes the configuration parameters of URSP rules based on terminal capabilities. For terminals without PDU session pair ID support, specific parameters (such as session redundancy configuration) are adjusted to enable reliable session establishment, while for terminals with support, different parameter settings are applied to optimize resource usage
3Device complexity
If the network manages both terminal types with a single URSP rule structure, then device complexity is reduced, but adaptability to different terminal capabilities deteriorates
Solution Approach 1:
The patent implements a dynamic URSP rule management approach where the network can adaptively select and apply different URSP rules based on terminal capabilities. The management structure remains relatively simple through automated rule selection, while adaptability is achieved through the dynamic matching of terminal characteristics with appropriate rule sets
Data Source
AI summary
One disclosure of the present specification provides a method by which a policy control function (PCF) performs communication. The method comprises the steps of: receiving a UE policy association establishment (UE association establishment) message from an access and mobility management function (AMF); and transmitting a UE route selection policy (URSP) rule to a user equipment (UE), wherein the URSP rule includes a first route selection descriptor (RSD) and a second RSD, the first RSD includes a protocol data unit (PDU) session pair identifier (ID), the PDU session pair ID is used to establish two redundant PDU sessions, and the second RSD does not include the PDU session pair ID.