Control Channel Detection Using Virtual CRC Field Validation
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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 CRC errors by monitoring control channels and using a specific value in 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 information among multiple multiplexed control channels, but false positive detections occur when control information from other UEs is incorrectly identified as the UE's own control information
Solution Approach 1:
The invention changes the parameter being checked from only CRC validation to include both CRC validation and error check field value validation. By requiring the error check field to match a specific value in addition to CRC passing, the system increases detection accuracy while reducing false positives in control information reception
Solution Approach 2:
The error check field acts as an intermediary validation layer between the CRC check and the final determination of control information validity. This additional check mediates the detection process by providing an extra criterion that must be satisfied, thereby reducing false positive detections while maintaining reliable control information identification
2Measurement precision
If the UE decodes all multiplexed control information to find its own control information, then the control information can be accurately identified, but radio resources are wasted due to unnecessary decoding of other UEs' control information
Solution Approach 1:
The invention performs preliminary filtering by checking the error check field value before completing full decoding and CRC validation. By checking this preliminary criterion, the UE can quickly eliminate control information belonging to other UEs without performing complete decoding, thus reducing radio resource consumption while maintaining accurate identification
Solution Approach 2:
The invention introduces an additional validation parameter (error check field value) that enables more efficient filtering of control information. This parameter change allows the UE to quickly determine whether to proceed with full decoding based on the error check field match, thereby reducing unnecessary processing and radio resource usage
3Productivity
If semi-persistent scheduling is used to allocate radio resources, then the UE can efficiently transmit and receive data during SPS interval, but incorrect CRC error detection leads to resource wastage and deterioration in communication reliability
Solution Approach 1:
The invention changes the validation parameters for control information detection to include both CRC check and error check field value verification. This dual-parameter validation ensures more reliable detection of control information in semi-persistent scheduling, preventing incorrect resource allocation decisions while maintaining efficient data transmission during SPS intervals
Solution Approach 2:
The invention implements a feedback mechanism where the error check field value provides additional verification feedback beyond the standard CRC check. This feedback loop ensures that control information is correctly identified before the UE acts on it, thereby maintaining high communication reliability during semi-persistent scheduling operations
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.