Rank Capability Reporting for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing transmission configuration indicator (TCI) states, leading to suboptimal layer distributions and resource utilization due to limitations in dynamic switching of TCI states, resulting in unusable or suboptimal communications and inefficient computing resource usage.
Innovation Solution
The method involves determining and transmitting maximum ranks for default TCI states, allowing base stations to receive and schedule communications based on these ranks, ensuring that layer distributions do not exceed the maximum supported ranks, thereby improving communication efficiency and resource utilization by treating invalid scheduling information when TCI states exceed specified ranks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic switching of TCI states is implemented, then communication flexibility is improved, but device complexity and resource management difficulty increase
Solution Approach 1:
The patent segments TCI state management by introducing separate default TCI states and non-default TCI states. Default TCI states are pre-configured and do not require dynamic switching, while non-default TCI states can be dynamically activated when needed. This segmentation reduces the complexity of managing all TCI states dynamically while maintaining communication flexibility when required.
Solution Approach 2:
The patent implements preliminary action by pre-configuring default TCI states during initial setup. These default states are established before communication occurs, eliminating the need for dynamic switching in straightforward scenarios. This preliminary configuration simplifies resource management by reducing the frequency and complexity of dynamic TCI state transitions.
2Manufacturing precision
If maximum rank information is transmitted for each TCI state, then layer distribution accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent segments rank information reporting by applying different reporting requirements to default and non-default TCI states. Default TCI states may use pre-agreed or simplified rank information, while non-default TCI states require explicit maximum rank transmission. This segmentation reduces overall signaling overhead while maintaining accurate layer distribution control where dynamically configured TCI states are used.
Solution Approach 2:
The patent applies local quality by providing detailed maximum rank information specifically for non-default TCI states where it is most needed, while using simplified or pre-established rank information for default TCI states. This targeted approach ensures accurate layer distribution control for dynamically configured states without incurring unnecessary signaling overhead for all TCI states uniformly.
3Reliability
If strict rank validation is performed on scheduling information, then communication reliability is improved, but processing time increases
Solution Approach 1:
The patent implements preliminary action by pre-validating and establishing maximum rank parameters for each TCI state during configuration phases. This preliminary setup allows the UE to perform faster validation checks during actual scheduling by comparing against pre-stored maximum rank values rather than performing complex calculations in real-time, thus maintaining reliability while reducing processing time.
4Device complexity
If default TCI states are used without dynamic switching, then device complexity is reduced, but communication adaptability decreases
Solution Approach 1:
The patent segments TCI state usage into default and non-default categories. Default TCI states provide simple, pre-configured operation that reduces complexity, while non-default TCI states provide dynamic switching capability for enhanced adaptability. This segmentation allows the system to operate in simple mode when possible while maintaining the option to switch to complex adaptive mode when communication conditions require it.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine one or more respective maximum ranks for one or more transmission configuration indicator states of the UE; and transmit information identifying the one or more respective maximum ranks. In some aspects, a base station may receive information identifying one or more respective maximum ranks of a UE for one or more TCI states of the UE; and transmit scheduling information for a communication for the UE, wherein the scheduling information is based at least in part on the one or more respective maximum ranks. Numerous other aspects are provided.