CSI Reporting of Recommended Subcarrier Spacing From Channel Conditions
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Solution Overview
Problem
In certain wireless communications networks, the subcarrier spacing may not be optimal due to a lack of necessary information for selecting the best subcarrier spacing, leading to inefficient communication.
Innovation Solution
A method and apparatus for indicating a subcarrier spacing value are introduced, where user equipment and network devices estimate and report channel conditions such as Doppler spread, delay spread, phase noise power, and inter-carrier interference to determine optimal subcarrier spacing values, enhancing link adaptation and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE is configured to monitor PDCCH in multiple search spaces with different TDD patterns, then the UE can support diverse service requirements and deployment scenarios, but the UE complexity and power consumption increase significantly
Solution Approach 1:
The patent segments the monitoring task by dividing search spaces into first search spaces (with first TDD pattern) and second search spaces (with second TDD pattern). The UE processes these separately, applying different determination rules to each segment, thereby reducing the complexity of simultaneously handling all search spaces with a single approach.
Solution Approach 2:
The patent applies different determination rules dynamically based on the search space type. For first search spaces, the UE determines SPS release PDCCH based on the first TDD pattern, while for second search spaces, it uses the second TDD pattern. This dynamic adaptation allows the UE to optimize its behavior for each specific search space context.
2Adaptability or versatility
If a UE monitors PDCCH in multiple search spaces with different TDD patterns, then the system can accommodate various deployment scenarios, but power consumption increases due to continuous monitoring requirements
Solution Approach 1:
By segmenting search spaces into distinct groups with different TDD patterns, the UE can apply optimized monitoring strategies to each segment. This allows the UE to reduce power consumption by avoiding unnecessary monitoring in search spaces where certain patterns are not applicable, while still maintaining support for diverse deployment scenarios.
Solution Approach 2:
The dynamic application of different determination rules enables the UE to adapt its monitoring behavior to the specific characteristics of each search space. This dynamic approach allows the UE to conserve power by not monitoring for PDCCH formats that are not expected in certain search spaces, while maintaining versatility across different deployment scenarios.
3Adaptability or versatility
If the network schedules SPS release PDCCH in search spaces with different TDD patterns, then the system achieves high flexibility, but the UE may miss PDCCH due to format mismatch errors
Solution Approach 1:
The patent segments search spaces based on their TDD patterns and associates each segment with specific PDCCH format expectations. The UE determines whether to monitor for SPS release PDCCH based on the segment's characteristics, thereby avoiding format mismatch errors while maintaining scheduling flexibility within each segment.
Solution Approach 2:
The UE dynamically adjusts its PDCCH monitoring behavior based on the search space type and associated TDD pattern. For first search spaces, the UE expects and monitors specific PDCCH formats, while for second search spaces, it applies different expectations. This dynamic adaptation ensures reliable PDCCH detection while preserving network scheduling flexibility.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for indicating a subcarrier spacing value. One method (500) includes receiving (502) a configuration from a network device for a report including an indication of at least one subcarrier spacing value for transmitting a physical channel, receiving the physical channel, or a combination thereof. The method (500) includes, in response to receiving the configuration, estimating (504) the at least one subcarrier spacing value by calculating a Doppler spread, an average delay, a delay spread, a phase noise power, an inter carrier interference level, or some combination thereof. The method (500) includes transmitting (506) the report including the indication of the at least one subcarrier spacing value.