DSDA UE Capability Sharing for Dual-SIM RF Conflict Handling
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Solution Overview
Problem
Current DSDA UEs face challenges in efficiently sharing hardware capabilities between SIMs, leading to temporary conflicts, data loss, and suboptimal QoS due to the lack of standardized mechanisms for capability exchange and RF sharing, resulting in inefficient resource utilization and increased hardware costs.
Innovation Solution
A method and system for DSDA UEs to dynamically split UE capabilities based on service categories and band information, adjusting and transmitting updated capabilities to the network, ensuring seamless transitions and optimal resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If RF capability is shared between stacks, then hardware cost is reduced, but performance is degraded to 50% of separate RF chip cases
Solution Approach 1:
The patent implements dynamic capability sharing where the RF capability is not statically allocated but dynamically adjusted based on real-time service requirements. The UE determines service categories for each stack, identifies capability conflicts, and dynamically shares the RF capability only when needed, allowing the system to adapt between cost-saving sharing mode and performance-optimized separate mode.
Solution Approach 2:
The patent changes the parameter of RF capability allocation from a fixed state to a variable state. By introducing capability conflict determination and dynamic sharing mechanisms, the RF capability parameters (such as bandwidth, power, and resource allocation) are adjusted based on service categories and network conditions, enabling the system to optimize between cost and performance.
2Reliability
If transmission chains are occupied by SIM A for communication in NW A, then communication quality in NW A is maintained, but SIM B cannot enter RRC connected state simultaneously
Solution Approach 1:
The patent segments the RF capability into different service categories (e.g., voice, data, signaling) and allocates them to different SIM stacks based on service requirements. This segmentation allows SIM A to maintain full capability for high-quality communication while SIM B can access segmented capabilities for lower-priority services, enabling simultaneous connectivity.
Solution Approach 2:
The patent applies partial action by allowing SIM B to use a portion of the RF capability (e.g., limited bandwidth or power) when SIM A is actively communicating. Instead of completely blocking SIM B, the system provides partial access to the transmission chains, enabling basic connectivity while maintaining primary communication quality.
3Productivity
If UE capability is not updated to the network when SIM B enters RRC connected state, then capability exchange overhead is reduced, but data loss occurs due to demodulation failure
Solution Approach 1:
The patent implements a feedback mechanism where the UE continuously monitors the RRC state of both SIM stacks and provides feedback to the network about capability changes. When SIM B transitions to RRC connected state or when capability conflicts are detected, the UE updates the network with the current capability status, ensuring the network can adjust its transmission parameters to prevent data loss.
Solution Approach 2:
The patent performs preliminary capability assessment before actual data transmission. By determining service categories and identifying potential capability conflicts in advance, the UE can proactively update the network about its capability status, preventing demodulation failures before they occur rather than reacting after data loss happens.
Data Source
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AI summary
A method for transmitting user equipment (UE) capability for a dual subscriber identity module (SIM) dual active (DSDA) user equipment (DSDA UE) by an electronic device is disclosed. The method comprises determining a corresponding service category for each of a first stack and a second stack based on at least one stack parameter indicated by the first stack and the second stack. The method comprises determining a mode associated with the DSDA UE based on the corresponding service categories of the first and second stacks. The method comprises receiving corresponding band information associated with the first and second stacks from at least one network entity associated with a network. The method comprises adjusting the UE based on the mode and the corresponding band information associated with the first and second stacks. The method comprises transmitting the adjusted UE capability to the at least one network entity.