DSDA UE Capability Signaling for Dynamic RF Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DSDA UEs face hardware conflicts and inefficiencies in sharing RF capabilities between SIMs, leading to data loss and suboptimal QoS due to lack of standardized mechanisms for capability exchange and dynamic resource management.
Innovation Solution
A method and system for DSDA UEs to determine service categories and adjust UE capabilities based on stack parameters, band information, and network interactions to dynamically split capabilities and inform networks of changes, ensuring seamless transitions and optimal resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If RF capability is shared between SIM stacks, then hardware cost is reduced, but performance deteriorates to 50% of separate RF chip cases
Solution Approach 1:
The patent implements dynamic capability sharing where the RF capability is not statically divided but dynamically allocated between SIM stacks based on real-time service requirements. The network entity receives capability information indicating available RF resources and adjusts resource allocation dynamically, allowing the system to achieve cost efficiency through sharing while maintaining performance through adaptive resource management.
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 access transmission chains when entering RRC connected state
Solution Approach 1:
The patent establishes a feedback mechanism where the UE informs the network entity about its capability status and transmission chain occupancy. When SIM A occupies transmission chains for NW A, the network receives capability information indicating this state and adjusts its scheduling and resource allocation accordingly. This feedback loop enables the network to maintain communication quality for active SIM while properly managing transitions when SIM B needs to enter connected state.
3Stability of the object's composition
If UE capability is not updated when SIM B enters RRC connected state, then network resource allocation remains stable, but data loss occurs due to demodulation failure
Solution Approach 1:
The patent implements preliminary action by having the UE proactively report its capability status to the network entity before actual data transmission begins. When SIM B enters RRC connected state, the UE updates the network about the changed capability status in advance, allowing the network to pre-adjust resource allocation and scheduling decisions. This prevents data loss from demodulation failures while maintaining stable network operations through advance notification.
4Reliability
If separate RF chips are used for both stacks, then performance is optimized for both stacks, but hardware cost increases
Solution Approach 1:
The patent makes the shared RF capability universal by designing it to serve multiple SIM stacks through dynamic allocation. Instead of dedicated hardware for each SIM, a single RF capability unit is designed to be multi-functional, able to serve SIM A or SIM B or both simultaneously based on service requirements. The network entity receives capability information that reflects this universal design and manages resource allocation to optimize performance for each stack when needed.
Data Source
AI summary
A method for transmitting user equipment (UE) capability by a dual subscriber identity module (SIM) dual active (DSDA) user equipment (DSDA UE) 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.