Control Channel Detection Using Virtual CRC Verification
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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 inefficient use of radio resources and reduced reliability, 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 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
1Reliability
If blind detection with CRC error detection is used to detect control information among multiplexed control channels, then the UE can identify its control information, but false positive detections occur where control information of other UEs is incorrectly identified, leading to waste of radio resources and reduced reliability
Solution Approach 1:
The patent introduces an intermediary verification step between CRC error detection and control information acceptance. A specific value check field is added that acts as a mediator to verify whether the detected control information truly belongs to the UE. This intermediary mechanism prevents false positive detections by control information of other UEs, thereby improving reliability without causing radio resource waste.
Solution Approach 2:
The patent applies preliminary action by performing an additional verification check before the UE processes the detected control information. The specific value check field is validated in advance to confirm the control information's authenticity. This preliminary verification prevents subsequent erroneous processing and radio resource allocation based on false detections, thus improving detection accuracy while conserving resources.
2Measurement precision
If the UE decodes all pieces of multiplexed control information to find its own control information, then the control information can be detected, but the detection process becomes time-consuming and complex
Solution Approach 1:
The patent applies preliminary action by incorporating a specific value check field that can be quickly validated before performing full control information decoding. This preliminary check allows the UE to rapidly identify and filter out control information that does not belong to it, significantly reducing the time required to find its own control information among multiplexed channels while maintaining detection accuracy.
3Productivity
If semi-persistent scheduling is used to allocate radio resources efficiently, then resource utilization improves, but incorrect CRC error detection leads to erroneous data transmission and reception, deteriorating communication reliability
Solution Approach 1:
The patent introduces an intermediary verification mechanism specifically for semi-persistent scheduling. The specific value check field acts as a mediator between resource allocation and data transmission/reception. By verifying this intermediary check field, the UE can confirm the authenticity of control information before engaging in data transmission, preventing erroneous communications while maintaining efficient resource utilization.
Solution Approach 2:
The patent applies feedback by implementing a verification mechanism that provides confirmation before data transmission. The specific value check field serves as a feedback element that confirms the control information is valid and intended for the UE. This feedback loop prevents erroneous data transmission and reception in semi-persistent scheduling, thereby improving communication reliability while preserving resource efficiency.
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.