Control Channel Detection Using Virtual CRC Field Checks
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Solution Overview
Problem
In wireless communication systems, blind detection methods for control information often result in incorrect CRC error detection, leading to resource wastage and reliability issues, especially in semi-persistent scheduling scenarios.
Innovation Solution
A method that involves checking a cyclic redundancy check (CRC) error by monitoring control channels and using a specific value of an error check field as a virtual CRC to accurately detect control information, thereby reducing false positives and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blind detection with CRC checking is used to detect control information, then the UE can identify its control channel among multiple multiplexed control channels, but incorrect CRC error detection occurs leading to false positives and resource wastage
Solution Approach 1:
The patent applies preliminary action by checking whether the error check field contains a specific value (e.g., all zeros or all ones) before performing CRC verification. This preliminary check filters out potentially invalid control information candidates early in the detection process, preventing false positives from propagating through the full CRC checking process, thereby improving both detection accuracy and communication reliability
Solution Approach 2:
The error check field serves as an intermediary mechanism between the control information content and the CRC verification process. By introducing this additional validation layer that checks for specific predetermined values, the system creates an intermediate filter that enhances the reliability of control information detection without replacing the existing CRC mechanism
2Ease of operation
If the UE decodes all multiplexed control information to find its own control channel, then control information can be detected, but radio resources are wasted due to incorrect detection and false positives
Solution Approach 1:
The patent implements preliminary action by performing a quick check on the error check field value before committing to full decoding and CRC verification of control information candidates. This early filtering mechanism reduces the number of false positive detections, thereby decreasing unnecessary radio resource consumption and energy wastage while maintaining the UE's ability to detect its control channel
Solution Approach 2:
The patent applies partial action by implementing an additional validation step (checking error check field for specific values) beyond the standard CRC verification. This extra partial check does not replace the existing detection capability but enhances it by filtering out invalid candidates, thereby reducing resource wastage without compromising detection effectiveness
Data Source
AI summary
A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to a specific value, detecting the control information on the control channel.