DCI Size Padding for Wireless Control Channel Ambiguity
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Solution Overview
Problem
Current wireless communication systems face ambiguity in downlink control information (DCI) formats, leading to indistinguishable PDCCH candidates, which results in diminished throughput and increased computing resource usage due to uninterpretable or misinterpreted DCI, reducing the range of usable DCI formats and configurations.
Innovation Solution
Performing padding operations to ensure different sets of DCI formats have distinct sizes and implementing rules to determine the appropriate DCI format for decoding, thereby eliminating ambiguity and enhancing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If DCI formats are size-aligned to reduce the number of DCI sizes, then device complexity and computing resource usage increase due to ambiguity and blind detections, but this approach simplifies the DCI size management
Solution Approach 1:
The patent applies local quality by making specific DCI formats (fallback formats 0_0 and 1_0) have a distinct size compared to non-fallback formats (0_1 and 1_1). This localized size differentiation resolves ambiguity only where needed while maintaining size alignment for other format pairs, thereby reducing blind detections and improving throughput without requiring all DCI formats to have unique sizes.
2Productivity
If padding operations are performed to differentiate DCI format sizes, then ambiguity is resolved and throughput increases, but device complexity and the number of DCI size configurations increase
Solution Approach 1:
The patent changes the size parameter of specific DCI formats by applying padding operations. Specifically, fallback DCI formats 0_0 and 1_0 are padded to have a larger size than non-fallback formats 0_1 and 1_1. This parameter change resolves ambiguity in DCI format identification, enabling correct interpretation and improving throughput while maintaining a manageable number of size configurations.
3Ease of operation
If the number of DCI sizes is reduced through size alignment, then the range of usable DCI formats is limited, but this simplifies the decoding process
Solution Approach 1:
The patent applies local quality by selectively differentiating sizes only for fallback DCI formats (0_0 and 1_0) while maintaining size alignment for non-fallback formats (0_1 and 1_1). This approach preserves the full range of usable DCI formats and their configurations while simplifying the decoding process by creating a clear size-based distinction for fallback formats, thereby resolving ambiguity without limiting format versatility.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may determine that a first set of downlink control information (DCI) formats is associated with a same DCI size as a second set of DCI formats, and perform a padding operation so that the first set of DCI formats and the second set of DCI formats are associated with different DCI sizes. Numerous other aspects are provided.