PDCCH Repetition Monitoring for RedCap Coverage Reliability
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Solution Overview
Problem
Reduced Capability User Equipment (RedCap UE) devices, such as wearables and industrial sensors, face challenges with inadequate PDCCH coverage due to their limited capabilities.
Innovation Solution
Implementing PDCCH repetition by providing first information that includes parameters for PDCCH repetition information, monitoring occasions, and resource sets to enhance coverage and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetition is implemented to enhance coverage, then coverage and reliability are improved, but device complexity and processing burden increase
Solution Approach 1:
The patent segments the PDCCH monitoring task by dividing the control information into multiple repetitions transmitted at different time occasions. Each repetition carries a portion of the control information, allowing the UE to monitor multiple instances and combine them to achieve complete reception. This segmentation approach improves coverage for RedCap UE while managing complexity through structured division of the monitoring task.
Solution Approach 2:
The patent implements periodic repetition of PDCCH transmissions at different time occasions. The network transmits the same control information multiple times at periodic intervals, and the UE monitors these periodic repetitions to ensure reliable reception. This periodic action enhances coverage for devices with limited capabilities while maintaining a regular, predictable monitoring pattern that manages device complexity.
2Reliability
If multiple search spaces and CORESETs are used for PDCCH repetition, then coverage is enhanced, but configuration complexity increases
Solution Approach 1:
The patent applies multi-functionality by configuring multiple search spaces and CORESETs that can be reused across different repetitions. The same search space and CORESET configurations serve multiple purposes across different time occasions and repetition instances. This universal approach enhances coverage through multiple transmission paths while reducing configuration complexity by avoiding redundant setup for each individual repetition.
Solution Approach 2:
The patent utilizes parameter changes in the time domain by varying transmission time, power levels, or other parameters across different repetitions while maintaining the same fundamental search space and CORESET configurations. This allows the system to enhance coverage through multiple transmission instances without proportionally increasing configuration complexity, as the same base configuration is reused with modified parameters.
Data Source
AI summary
A Physical Downlink Control Channel (PDCCH) monitoring method, a PDCCH sending method, and a terminal are provided. The PDCCH monitoring method includes: obtaining first information; and monitoring a PDCCH repetition based on the first information. The first information includes at least one of the following: a first parameter; a second parameter; a third parameter; and a fourth parameter. The first parameter is used to indicate PDCCH repetition information. The PDCCH repetition information comprises at least one of the following: times of PDCCH repetition, a monitoring occasion of the PDCCH repetition, or duration of each PDCCH repetition. The second parameter is used to indicate whether to perform the PDCCH repetition. The third parameter is used to indicate P search spaces for the PDCCH repetition. P is a positive integer. The fourth parameter is used to indicate Q Control Resource Sets (CORESETs) for the PDCCH repetition. Q is a positive integer.