Control Channel Detection with Selective Overlap Handling

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Solution Overview

Problem

In wireless communication, overlapping resources of candidate control channels in different search spaces lead to uncertainty in determining the correct format of control channels, resulting in low detection reliability.

Innovation Solution

The terminal device detects only one first candidate control channel among overlapping channels in different search spaces, ensuring correct format determination and improved reliability by avoiding detection of channels in mixed formats.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal device detects multiple candidate control channels on overlapping resources, then the probability of detecting the control channel increases, but the terminal device cannot determine the format of the control channel, resulting in low detection reliability

Engineering Contradiction:

Improvecontrol channel detection reliabilityVSAvoidcontrol channel format determination

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts and removes the ambiguous candidate control channels from the detection process. When multiple candidate control channels are detected on overlapping resources, the terminal device selects only one candidate control channel for further processing, discarding the others. This extraction eliminates the format determination ambiguity while preserving the detection capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of trying to determine the format of multiple detected control channels, the patent inverts the approach by selecting one candidate control channel and assuming its format. The terminal device inverts the problem from 'determine format of detected channel' to 'select candidate channel and use its format', thereby resolving the ambiguity.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If the terminal device detects candidate control channels in different search spaces with overlapping resources, then more control channels can be monitored, but the terminal device cannot correctly parse the received control channel due to format uncertainty

Engineering Contradiction:

Improvesearch space monitoring capabilityVSAvoidcontrol channel parsing accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent extracts the ambiguous candidate control channels from the monitoring process. When candidate control channels from different search spaces overlap, the terminal device extracts and selects only one candidate control channel for format determination and parsing, removing the sources of ambiguity while maintaining monitoring capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent inverts the parsing approach by selecting one candidate control channel first and then applying its format for parsing, rather than attempting to determine the format of multiple overlapping channels. This inversion resolves the parsing accuracy issue while preserving adaptability to different search spaces.

Inventive Principle:

Principle #13The other way round (Inversion)

3Quantity of substance

If the terminal device attempts to detect all candidate control channels including those in different formats, then detection coverage is improved, but the terminal device cannot correctly identify and parse the control channel format

Engineering Contradiction:

Improvenumber of detected control channelsVSAvoidcontrol channel format identification

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent extracts and removes the excessive candidate control channels that cause format ambiguity. When multiple candidate control channels are detected, the terminal device extracts and selects only one for format identification and parsing, discarding the others to maintain reliable format identification.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent inverts the detection strategy from 'detect all and determine format' to 'select one and use its format'. By inverting the approach, the terminal device maintains detection coverage while ensuring reliable format identification through selective processing of a single candidate control channel.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12395295B2Control channel detection method, apparatus, and device to improve reliability

Publication Date: 2025.08.19 HUAWEI TECH CO LTD

AI summary

This application provides a control channel detection method, apparatus, and device. The method includes: A terminal device determines that resources of at least two candidate control channels overlap, where any two of the at least two candidate control channels are located in different search spaces; and the terminal device detects only at least one first candidate control channel in the at least two candidate control channels. This improves control channel detection reliability.