PDCCH Blind Decoding via Per-Set DMRS Channel Estimation
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently performing blind decoding for physical downlink control channel (PDCCH) candidates due to resource constraints and the need for advanced channel estimation methods.
Innovation Solution
A method is proposed that involves a user equipment (UE) receiving configuration information for a search space set and a control resource set from a base station, and performing blind decoding for multiple PDCCH candidates within the control resource set. This method utilizes a demodulation reference signal (DMRS) configured per control resource set for channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional blind decoding methods are used for PDCCH candidates, then the decoding process can be performed, but the number of channel estimations is excessive and resource utilization is inefficient
Solution Approach 1:
The patent segments the control resource set into multiple candidate PDCCHs with different aggregation levels, and associates specific DMRS configurations with each candidate. This segmentation allows the UE to perform channel estimation only for the specific DMRS configurations corresponding to actual PDCCH candidates, rather than performing estimation for all possible candidates, thereby reducing computational resources and energy consumption while maintaining decoding efficiency.
2Adaptability or versatility
If multiple PDCCH candidates are decoded without DMRS configuration, then decoding coverage is maximized, but channel estimation complexity increases significantly
Solution Approach 1:
The patent applies local quality by configuring DMRS specifically for each control resource set and associating it with particular PDCCH candidates. Instead of using a uniform channel estimation approach for all candidates, the system tailors the DMRS configuration to the specific characteristics of each candidate, enabling efficient local estimation only where needed while maintaining comprehensive coverage.
Solution Approach 2:
The DMRS acts as an intermediary signal between the base station and UE for channel estimation. By introducing this dedicated reference signal for each control resource set, the patent enables accurate channel estimation without requiring complex processing of all possible PDCCH candidates, thus reducing device complexity while maintaining adaptability.
3Measurement precision
If DMRS is configured per control resource set, then channel estimation efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent implements universality by defining a standardized DMRS configuration framework that can be applied across multiple control resource sets. The same configuration mechanism and parameters are reused for different PDCCH candidates, reducing the actual complexity burden while maintaining precise channel estimation for each candidate through the universal template.
Data Source
AI summary
A method of performing blind decoding for a physical downlink control channel (PDCCH) candidate and a device therefor in a wireless communication system are disclosed. Specifically, the method performed by a user equipment (UE) includes receiving, from a base station, configuration information related to a search space set, receiving, from the base station, a control resource set, and performing a blind decoding for a plurality of PDCCH candidates included in the control resource set based on the configuration information, wherein a demodulation reference signal (DMRS) is received per control resource set and is used in a channel estimation for a demodulation of the plurality of PDCCH candidates.