Dual Active SIM User Equipment Service Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining concurrent services in a dual active mode, particularly when transitioning between different radio access technologies (RATs) or frequency bands, which can result in service disruptions and poor user experience.
Innovation Solution
A user equipment (UE) is configured to establish and maintain concurrent communication connections using multiple subscriptions, operating in a dual subscriber identity module (SIM) dual active (DSDA) mode. The UE performs actions such as refraining from transmitting measurement reports for lower priority services and ending voice calls that would result in incompatible RAT or frequency band combinations, to maintain operation in the DSDA mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transitions between different radio access technologies or frequency bands to maintain service quality, then service quality is improved, but service continuity is disrupted
Solution Approach 1:
The UE proactively identifies incompatible RAT or frequency band combinations before transitioning occurs. By detecting potential incompatibility in advance, the system prevents service disruption from happening, rather than reacting after the disruption occurs. This is achieved through checking compatibility information associated with each subscription before initiating RAT or frequency band transitions.
Solution Approach 2:
The system performs compatibility verification and takes preventive actions before RAT or frequency band transitions are executed. By assessing whether the target RAT or frequency band combination is compatible with DSDA mode beforehand, the UE can avoid transitions that would cause service disruption, ensuring continuous service while maintaining quality.
2Adaptability or versatility
If the UE maintains concurrent services on multiple subscriptions simultaneously, then user experience is improved, but system complexity increases
Solution Approach 1:
The system manages each subscription independently by associating compatibility information with individual subscriptions. This segmentation allows the UE to handle multiple subscriptions concurrently without managing them as a single complex system. Each subscription can be evaluated and controlled separately based on its own compatibility characteristics, simplifying the overall management of concurrent services.
Solution Approach 2:
The patent applies different compatibility rules and restrictions to different subscriptions based on their specific characteristics. Rather than applying a uniform complex management approach to all subscriptions, the system tailors the management strategy to each subscription's RAT and frequency band requirements, reducing overall system complexity while maintaining concurrent service capability.
3Reliability
If the UE restricts RAT or frequency band transitions to maintain DSDA mode, then service continuity is improved, but service quality may deteriorate
Solution Approach 1:
The system continuously monitors the status of concurrent services and the compatibility of active RAT and frequency band combinations. When a service quality degradation is detected or when compatibility conditions change, the system can adjust its behavior to maintain optimal service quality while preserving DSDA mode operation. This feedback mechanism allows dynamic balancing between service continuity and service quality.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may establish, using a first subscription of the UE, a first communication connection associated with a first service. The UE may establish, using a second subscription of the UE, a second communication connection associated with a second service. The UE may operate in a dual subscriber identity module (SIM) dual active (DSDA) mode based at least in part on establishing the first communication connection and establishing the second communication connection. The UE may perform an action to maintain concurrent services, including the first service and the second service, while operating in the DSDA mode. Numerous other aspects are described.