Multi-SIM UE RRC Scheduling via Periodic Pattern Feedback
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Solution Overview
Problem
Multi-SIM user equipment (UEs) face challenges in managing multiple subscriptions and network transitions, leading to inefficiencies and performance issues due to lack of standardized support for simultaneous multi-SIM operations, resulting in potential data loss and scheduling failures.
Innovation Solution
A method where the UE determines a periodic pattern for performing idle/inactive mode procedures in a second network and transmits this pattern to the first network, allowing the network to synchronize and adjust scheduling to avoid conflicts and ensure seamless state transitions, enabling the UE to maintain connectivity and perform necessary operations in both networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE performs idle/inactive mode procedures in a second network, then the UE can maintain connectivity and perform necessary operations in both networks, but scheduling failures and data loss occur due to lack of network synchronization
Solution Approach 1:
The UE transmits the periodic pattern preference to the network node before actually performing idle/inactive mode procedures in the second network. This preliminary action allows the network to proactively configure gap patterns and adjust scheduling in advance, preventing scheduling failures and data loss before they occur during multi-network operations
Solution Approach 2:
The network node receives feedback from the UE about its periodic pattern preference for performing idle/inactive mode procedures in the second network. Based on this feedback, the network node dynamically adjusts the scheduling and configures appropriate gap patterns, creating a closed-loop system that ensures reliable scheduling while maintaining multi-network connectivity
2Adaptability or versatility
If the UE maintains RRC connection in first network while performing operations in second network, then connectivity is maintained in both networks, but resource conflicts and scheduling failures occur
Solution Approach 1:
The solution segments the time resources by introducing periodic gap patterns where the UE can switch to the second network while maintaining RRC connection in the first network. The network configures specific time windows (gaps) for second network operations, separating resource usage in time to avoid conflicts and reduce management complexity
Solution Approach 2:
The gap pattern configuration is made dynamic based on UE feedback. The network adjusts the periodicity, duration, and timing of gaps according to the UE's actual needs for second network operations, optimizing resource management while enabling simultaneous network operations without fixed rigid scheduling
3Productivity
If the network schedules UE without knowing periodic pattern, then network resource utilization is maximized, but data loss occurs during UE state transitions
Solution Approach 1:
The network receives the periodic pattern preference from the UE in advance before scheduling data transmissions. This allows the network to proactively avoid scheduling during gap periods when the UE will be performing idle/inactive procedures in the second network, preventing data loss while maintaining high resource utilization during non-gap periods
Solution Approach 2:
The UE provides feedback about its periodic pattern preference, enabling the network to adapt its scheduling strategy. The network uses this feedback information to optimize resource allocation, scheduling data transmissions during periods when the UE is available while respecting the periodic gaps needed for second network operations
Data Source
AI summary
According to some embodiments, a method is performed by a wireless device operating in both a first network and a second network (e.g., the wireless device is in an idle/inactive state in the second network). The method comprises determining a pattern for performing procedures (e.g., a set of idle/inactive mode procedures) in the second network, and upon transition of the wireless device from an inactive/idle state to a connected state in the first network, transmitting an indication of the determined pattern to the first network.