PUCCH Receiver DTX Detection Using Power Normalization

Solution Overview

Problem

Current wireless communication systems face challenges in accurately and efficiently detecting discontinuous transmission (DTX) states at the Physical Uplink Control Channel (PUCCH), leading to latency and resource wastage, especially in 5G NR Ultra-reliable low-latency communication applications.

Innovation Solution

A method and apparatus for early and efficient DTX detection in PUCCH receivers, involving normalization of signal power after resource element demapping, comparison to a calculated threshold, and termination of processing if DTX is determined, allowing for generic application across LTE and 5G NR systems without requiring full conventional DTX detection processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional DTX detection processes are used, then detection accuracy is maintained, but processing latency increases and processing resources are wasted

Engineering Contradiction:

ImproveDTX detection accuracyVSAvoidprocessing latency

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary power normalization and threshold comparison on received PUCCH signals before complete processing. By calculating normalized power values and comparing against thresholds early in the processing chain, the system can identify and terminate DTX cases before full decoding and processing occurs, significantly reducing latency while maintaining detection accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the DTX detection process into distinct stages: power normalization, threshold comparison, and full processing. This segmentation allows the system to perform quick power-based checks first, and only proceed to resource-intensive processing when necessary, thereby reducing overall processing time while maintaining accuracy

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If conventional DTX detection processes are used, then detection accuracy is maintained, but processing resource consumption increases

Engineering Contradiction:

ImproveDTX detection accuracyVSAvoidprocessing efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent performs preliminary power normalization and threshold comparison on received PUCCH signals before complete processing. By calculating normalized power values and comparing against thresholds early in the processing chain, the system can identify and terminate DTX cases before full decoding and processing occurs, significantly reducing latency while maintaining detection accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the DTX detection process into distinct stages: power normalization, threshold comparison, and full processing. This segmentation allows the system to perform quick power-based checks first, and only proceed to resource-intensive processing when necessary, thereby reducing overall processing time while maintaining accuracy

Inventive Principle:

Principle #1Segmentation

3Reliability

If DTX is not detected early, then complete signal processing is performed, but latency and resource wastage increase

Engineering Contradiction:

Improvesignal processing completenessVSAvoidprocessing latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary power normalization and threshold comparison on received PUCCH signals before complete processing. By calculating normalized power values and comparing against thresholds early in the processing chain, the system can identify and terminate DTX cases before full decoding and processing occurs, significantly reducing latency while maintaining detection accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts and processes only the essential power information from received signals for early DTX determination. By separating the power analysis function from complete signal processing, the system can make rapid DTX decisions based on power levels alone, extracting only the necessary information needed for early termination without performing full decoding

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11197279B1Method and an apparatus for physical uplink control channel (PUCCH) discontinuous transmission (DTX) determination in a wireless communication system

Publication Date: 2021.12.07 HONG KONG APPLIED SCI & TECH RES INST

AI summary

Described is a method and apparatus for processing an uplink (UL) signal at a Physical Uplink Control Channel (PUCCH) in a wireless communication system to determine a discontinuous transmission (DTX) state. The method comprises receiving a UL channel signal at a PUCCH receiver apparatus and, after resource element (RE) demapping of said received UL channel signal in said PUCCH receiver apparatus, normalizing a signal power of at least one signal element or resource. The normalized power is compared to a selected, calculated or predetermined threshold and, based on said comparison, a determination is made on whether or not a DTX state has occurred.