CORESET #0 Puncturing Patterns for Narrowband CCE Alignment
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Solution Overview
Problem
Existing technologies face challenges in efficiently configuring CORESET #0 within narrow bandwidths, such as 5 MHz, leading to partial CCEs that degrade channel estimation due to puncturing, particularly in scenarios like band n100, where CORESET #0 needs to be constrained within 20 RBs.
Innovation Solution
A method and apparatus for determining and managing CORESET puncturing patterns based on synchronization signal block detection, allowing flexible selection and alignment of CORESET #0 resources to minimize partial CCEs, using predefined thresholds and patterns to ensure efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CORESET #0 is configured within narrow bandwidth (5 MHz) to support dedicated spectrum, then spectral efficiency is improved, but partial CCEs are created due to puncturing which degrades channel estimation
Solution Approach 1:
The patent applies preliminary action by pre-determining the puncturing pattern based on the detected frequency location of the SSB before actual communication begins. The UE determines whether CORESET #0 should be punctured and identifies the punctured resources in advance, allowing for proper channel estimation without the need for post-hoc corrections. This resolves the contradiction by enabling narrow bandwidth operation while maintaining estimation accuracy through advance knowledge of resource availability.
Solution Approach 2:
The patent changes the parameter of resource allocation by introducing a frequency-location-dependent puncturing pattern. Instead of a fixed CORESET configuration, the system adapts the effective resources based on the detected SSB frequency location. This allows the system to maintain spectral efficiency in narrow bandwidth while adjusting the active resources to avoid partial CCEs that would degrade channel estimation.
2Adaptability or versatility
If CORESET #0 is constrained within 20 RBs for band n100, then compliance with spectrum requirements is improved, but resource allocation flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the CORESET configuration adaptive rather than static. The UE dynamically determines the puncturing pattern based on the detected frequency location of the SSB. This allows the system to comply with the 20 RB constraint for band n100 while maintaining flexibility in resource allocation through frequency-location-dependent decision-making, resolving the contradiction between compliance and flexibility.
3Measurement precision
If synchronization signal block detection is used to determine puncturing, then resource allocation accuracy is improved, but detection complexity is increased
Solution Approach 1:
The patent applies self-service by using the SSB detection process itself to provide the information needed for puncturing determination. The frequency location detection that is already performed as part of initial access and cell search is reused to determine the puncturing pattern, eliminating the need for separate detection mechanisms. This resolves the contradiction by achieving accurate resource allocation through the existing detection process without adding significant complexity.
Data Source
AI summary
Embodiments of the present disclosure relate to controlling a control resource set (CORESET) #0 puncturing. Some embodiments comprise determining, at a first apparatus, based at least on detection of a synchronization signal block, received from a second apparatus, on a specific frequency location, whether a CORESET of a specific type is punctured, wherein a portion of resources punctured in the CORESET of the specific type are incapable of carrying downlink control information; in accordance with a determination that the CORESET of the specific type is punctured, obtaining a CORESET puncturing pattern; and determining the portion of resources punctured in the CORESET at least based on the CORESET puncturing pattern. Furthermore, the method comprises indicating, from a second apparatus to a first apparatus, that a CORESET of a specific type is punctured by transmitting a synchronization signal block on a specific frequency location.