SIM Management for DSDA Devices Using URSP Rules
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Solution Overview
Problem
Current dual SIM devices, particularly in 5G networks, face challenges in efficiently managing Protocol Data Unit (PDU) sessions across multiple Subscriber Identity Modules (SIMs), leading to poor user experience due to inadequate mechanisms for selecting the appropriate SIM for applications based on UE Route Selection Policy (URSP) rules, resulting in issues like poor service distribution, service interruptions, and degradation in user experience.
Innovation Solution
The implementation of methods and systems on User Equipment (UE) to identify and select the appropriate SIM for establishing PDU sessions based on the URSP rules of each SIM, considering factors like Local Area Data Network (LADN) availability, Public Network Integrated Non-Public Network (PNI-NPN) services, and current SIM status, ensuring optimal service distribution and minimizing service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If applications are mapped to only one SIM based on user choice or pre-existing methods, then the mapping process is simple, but the service distribution becomes poor and user experience degrades
Solution Approach 1:
The patent implements dynamic application-SIM mapping by continuously evaluating URSP rules and service characteristics to determine optimal SIM assignment in real-time, rather than using static pre-configured mappings. This allows the system to adapt to changing network conditions and service requirements, improving service distribution quality while maintaining ease of operation through automated decision-making.
Solution Approach 2:
The patent changes the mapping parameters from simple user choice to multi-criteria evaluation including URSP rules, service characteristics, network conditions, and SIM status. By introducing these additional parameters and their weighting mechanisms, the system achieves superior service distribution while keeping the user interface simple through automated processing of complex criteria.
2Productivity
If URSP rules are considered for application to SIM mapping, then service distribution improves, but the selection mechanism becomes complex
Solution Approach 1:
The patent segments the complex URSP rule evaluation process into distinct modules: traffic descriptor matching, route selection descriptor processing, and SIM status evaluation. This segmentation allows the complex mapping mechanism to be broken down into manageable steps that can be processed systematically, improving service distribution quality while making the overall complexity more manageable through structured architecture.
Solution Approach 2:
The patent introduces an intermediary decision-making framework that mediates between URSP rules and SIM selection. This intermediary layer processes and prioritizes multiple URSP rules, compares them against current SIM status and network conditions, and produces the final mapping decision. This mediator simplifies the interaction between complex URSP processing and SIM selection, improving service distribution while managing mechanism complexity through a coordinated decision architecture.
3Ease of operation
If multiple applications are mapped to a single SIM, then the mapping process is straightforward, but data distribution and service categorization become poor
Solution Approach 1:
The patent segments applications into different categories based on their service characteristics, traffic descriptors, and URSP rule matches. Each segment is then independently evaluated against available SIMs and their current status. This segmentation enables fine-grained control over data distribution, ensuring that different applications receive appropriate SIM assignments, thereby improving data distribution quality while maintaining mapping process simplicity through automated categorization.
Solution Approach 2:
The patent applies local quality by tailoring the mapping decision to the specific characteristics of each application and SIM combination. Instead of uniform treatment, the system evaluates local factors such as application priority, service type, current SIM signal quality, and network conditions to make optimized mappings. This local quality approach improves data distribution and service categorization while keeping the mapping process simple through automated local optimization.
4Speed
If PDU sessions are established without considering SIM status and LADN availability, then the setup process is fast, but service interruptions occur
Solution Approach 1:
The patent performs preliminary evaluation of SIM status, LADN availability, and network conditions before establishing PDU sessions. By pre-checking these factors and preparing appropriate mapping decisions in advance, the system ensures that PDU sessions are established on suitable SIMs, preventing service interruptions. This preliminary action maintains fast setup speeds while improving service continuity through proactive SIM selection based on current status and availability.
Data Source
AI summary
Methods and systems for SIM management on a DSDA/DSDS device. Methods and systems for Subscriber Identity Module (SIM) management on a User Equipment (UE) are provided. The UE includes one of, a Dual SIM Dual Active (DSDA) UE, or a Dual SIM Dual Standby (DSDS) UE. A method disclosed herein includes selecting a SIM from dual SIM for at least one application to establish at least one Protocol Data Unit (PDU) session. The method includes selecting the SIM for the at least one application based on, at least one of, UE Route Selection Policy (URSP) rules of each SIM, Local Area Data Network (LADN) Data Network Names (DNNs) available per SIM, a current status of each SIM, and an availability of Public Network Integrated Non-Public Network (PNI-NPN) services for each SIM.