UE PDCCH Beam Selection via Search Space Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving reliable PDCCH transmissions, particularly for Industrial Internet of Things (IIoT) and ultra-reliable low-latency communications, due to excessive memory usage and complexity in monitoring multiple beams with different QCL parameters and TCI states.
Innovation Solution
The user equipment (UE) autonomously selects a subset of search space sets with common QCL parameters and TCI states to monitor, reducing memory utilization and complexity while achieving reliability thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors multiple search space sets with different QCL parameters and TCI states to ensure reliable PDCCH reception, then the reliability of communication is improved, but the memory usage and device complexity increase excessively
Solution Approach 1:
The patent segments the plurality of search space sets into a subset that the UE will monitor. Instead of monitoring all search space sets associated with multiple QCL parameters and TCI states, the UE selectively monitors only a subset of search space sets, thereby reducing complexity while maintaining reliability through targeted monitoring of critical control channels.
Solution Approach 2:
The patent extracts and eliminates unnecessary monitoring of search space sets that do not contribute to reliability thresholds. By identifying and removing redundant search space set monitoring from the UE's operation, the system reduces memory usage and device complexity while preserving the essential functionality of reliable PDCCH reception.
2Reliability
If the UE monitors multiple search space sets with different QCL parameters and TCI states to ensure reliable PDCCH reception, then the reliability of communication is improved, but the memory resources consumed increase excessively
Solution Approach 1:
The patent segments the monitoring task by dividing the plurality of search space sets into a manageable subset. The UE monitors only this subset rather than all possible search space sets, which reduces the quantity of data that must be stored in memory while maintaining sufficient reliability for PDCCH transmissions.
Solution Approach 2:
The patent extracts and removes redundant search space set monitoring requirements, thereby reducing the memory resources needed to store and process control information. By eliminating unnecessary search space sets from the monitoring list, the system achieves reliable communication with reduced memory consumption.
3Reliability
If the UE monitors all search space sets to receive downlink control information, then the completeness of control information reception is improved, but the processing time and complexity increase
Solution Approach 1:
The patent segments the search space set monitoring into a focused subset, allowing the UE to process control information more efficiently. By monitoring only essential search space sets, the UE reduces processing time while maintaining completeness of critical control information reception.
Solution Approach 2:
The patent applies partial action by monitoring a subset of search space sets rather than all possible sets. This partial monitoring approach is sufficient to receive necessary downlink control information without the excessive processing time and complexity that would result from monitoring all search space sets.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select, from a plurality of search space sets associated with a plurality of control resource sets, a subset of the plurality of search space sets to monitor. The UE may monitor the subset of the plurality of search space sets, to receive a downlink control information message, for a physical downlink control channel beam associated with the subset of the plurality of search space sets. Numerous other aspects are provided.