Control Information Detection with Error Check 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 waste of radio resources 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

VSEngineering Contradiction Analysis

1Reliability

If blind detection with CRC error detection is used to detect control information, then the UE can identify control information among multiple multiplexed control channels, but incorrect CRC error detection occurs leading to false positives and waste of radio resources

Engineering Contradiction:

Improvecontrol information detection accuracyVSAvoidradio resource waste

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent introduces an error check field as an intermediary verification mechanism between the CRC check and the final detection decision. This additional field acts as a mediator that provides a second layer of validation, reducing false positive detections and improving overall detection reliability without requiring additional blind decoding attempts

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The error check field is prepared and transmitted along with the control information before the UE performs detection. This preliminary preparation of verification data allows the UE to perform quick validation without having to perform full blind decoding, thereby preventing waste of radio resources on incorrect detections

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the UE decodes all pieces of control information to find its own control information, then the control information can be detected, but the detection accuracy decreases due to incorrect CRC error detection

Engineering Contradiction:

Improvecontrol information detection capabilityVSAvoidcontrol information detection accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The detection process is segmented into two distinct verification stages: first the CRC error detection, then the error check field verification. This segmentation allows the UE to quickly filter out incorrect control information using the error check field before committing resources to full decoding, thereby improving detection accuracy while maintaining ease of operation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of performing full decoding on all control information pieces, the UE performs partial verification using the error check field. This partial action approach allows the UE to validate control information with minimal processing, and only perform full decoding when the error check field confirms validity, thus improving precision without sacrificing operational capability

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS9560600B2Method for detecting control information in wireless communication system

Publication Date: 2017.01.31 LG ELECTRONICS INC

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.