Multi-USIM UE Capability Signaling for Thermal Conflict Control
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Solution Overview
Problem
Existing 5G NR technologies face inefficiencies in managing multiple universal subscriber identity modules (USIMs) within a single wireless device, leading to potential overheating and resource conflicts, particularly when dual USIMs are active.
Innovation Solution
A method and apparatus that allow a UE to transmit UE capability information and UE assistance information indicating a modified subset of capabilities when multiple USIMs are active, enabling efficient communication with a base station based on these modified capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple USIMs are active simultaneously in a UE, then the UE can communicate with multiple networks, but the UE may overheat and experience resource conflicts
Solution Approach 1:
The patent implements dynamic capability adjustment where the UE transitions between full capability mode (single USIM) and reduced capability mode (multiple USIMs active). The base station receives capability information indicating whether the UE is operating in multi-USIM mode and accordingly adjusts scheduling, resource allocation, and parameter configurations to prevent overheating and resource conflicts while maintaining multi-network communication functionality
Solution Approach 2:
The patent changes operational parameters based on USIM activation state. When multiple USIMs are active, the UE transmits modified capability information to the base station, which then adjusts communication parameters such as bandwidth, modulation schemes, and resource block allocations to reduce thermal load and prevent resource conflicts, thereby resolving the contradiction between multi-USIM functionality and thermal management
2Productivity
If the UE transmits full capability information to the base station, then the base station can optimize resource allocation, but the capability information size increases when multiple USIMs are active
Solution Approach 1:
The patent extracts and separates capability information based on operational context. The UE transmits only the necessary capability subset relevant to the current USIM activation state. When multiple USIMs are active, the UE transmits a reduced capability information set that excludes parameters not applicable to multi-USIM operation, thereby reducing message size while still enabling the base station to perform effective resource allocation for the active configuration
3Productivity
If the base station configures parameters based on full UE capabilities, then optimal performance is achieved, but the configuration may not be appropriate when multiple USIMs are active
Solution Approach 1:
The patent implements a feedback mechanism where the UE continuously informs the base station about its operational state regarding USIM activation. The base station receives capability information that reflects the current USIM configuration, and based on this feedback, dynamically adjusts parameter configurations to ensure they are appropriate for the active mode (single or multi-USIM), thereby maintaining both performance and configuration appropriateness
Data Source
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AI summary
A configuration for dynamic capacity for multiple universal subscriber identity modules. The apparatus transmits, to a base station, UE capability information in response to a UE capability enquiry, the UE capability information including a set of UE capabilities. The apparatus transmits, to the base station, UAI including an IE indicating a modified subset of UE capabilities of the set of UE capabilities when multiple USIMs are active at the UE. The apparatus operates based on the modified subset of UE capabilities when multiple USIMs are active at the UE.