User Equipment Polar Code Blind Decoding Optimization

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Solution Overview

Problem

The increasing number of PDCCH candidates in next-generation communication systems leads to higher power consumption and processing time for user equipment, limiting their performance due to the need for blind decoding on all candidates.

Innovation Solution

Implementing selective blind decoding by determining valid PDCCH candidates through error detection and polar coding methods, such as frozen bit error ratio (FBER) and regenerated FBER, to reduce the number of candidates requiring decoding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If blind decoding is performed on all PDCCH candidates, then all valid PDCCH candidates can be detected, but power consumption and processing time increase significantly

Engineering Contradiction:

ImprovePDCCH candidate detection reliabilityVSAvoiduser equipment power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies preliminary action by performing error detection on PDCCH candidates before blind decoding. The user equipment first checks whether a PDCCH candidate is valid using error detection mechanisms (such as checking frozen bits in polar coding), and only then performs blind decoding on candidates that pass the validation. This preliminary filtering step prevents unnecessary blind decoding operations on invalid candidates, thereby reducing power consumption while maintaining reliable detection of valid PDCCH candidates.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If blind decoding is performed on all PDCCH candidates, then all valid PDCCH candidates can be detected, but processing time increases significantly

Engineering Contradiction:

ImprovePDCCH candidate detection reliabilityVSAvoidblind decoding processing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by performing error detection on PDCCH candidates before blind decoding. The user equipment first checks whether a PDCCH candidate is valid using error detection mechanisms (such as checking frozen bits in polar coding), and only then performs blind decoding on candidates that pass the validation. This preliminary filtering step prevents unnecessary blind decoding operations on invalid candidates, thereby reducing processing time while maintaining reliable detection of valid PDCCH candidates.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the number of search spaces increases, then more PDCCH candidates can be monitored, but the complexity of blind decoding increases

Engineering Contradiction:

ImprovePDCCH monitoring capabilityVSAvoidblind decoding complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by performing error detection on PDCCH candidates before blind decoding. The user equipment first checks whether a PDCCH candidate is valid using error detection mechanisms (such as checking frozen bits in polar coding), and only then performs blind decoding on candidates that pass the validation. This preliminary filtering step reduces the number of candidates requiring complex blind decoding operations, thereby reducing decoding complexity while maintaining the ability to monitor multiple search spaces.

Inventive Principle:

Principle #10Preliminary action

4Use of energy by moving object

If selective blind decoding is performed only on valid PDCCH candidates, then power consumption and processing time are reduced, but the ability to detect valid candidates may be compromised

Engineering Contradiction:

Improveuser equipment power consumptionVSAvoidPDCCH candidate detection reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies feedback by using error detection results to guide the blind decoding process. The user equipment performs error detection on PDCCH candidates, uses the detection results to identify valid candidates, and then performs blind decoding only on those candidates. This feedback mechanism ensures that selective blind decoding does not compromise the detection of valid candidates, as the error detection step provides reliable information about candidate validity.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240023134A1User equipment performing blind decoding and operating method thereof

Publication Date: 2024.01.18 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of wireless communication is described. A user equipment performs data communication based on a polar code with a base station by obtaining a physical downlink control channel (PDCCH) candidate from at least one search area in a frequency band for the data communication, performing error detection on frozen bits of the PDCCH candidate, determining whether the PDCCH candidate is a valid PDCCH candidate based on a result of the error detection, and selectively performing polar decoding on the PDCCH candidate based on a determination result of the valid PDCCH candidate.