PDCCH Candidate Merging for Lower Blind-Decoding Complexity

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing repetitive PDCCH transmissions, particularly in scenarios involving overbooking and channel control elements, which can lead to increased computational load and resource inefficiencies.

Innovation Solution

A wireless communication device determines a first number of PDCCH transmissions for blind detection decoding, performing single or multiple blind detection decodings based on the number of PDCCH candidates, and adjusts monitoring strategies to handle overbooking scenarios by skipping certain transmissions or combining data for efficient decoding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple PDCCH transmissions are monitored and decoded separately, then reliability of control channel reception is improved, but computational load and processing complexity increase

Engineering Contradiction:

Improvecontrol channel reception reliabilityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple PDCCH transmissions by selecting a first PDCCH transmission from a set of K associated PDCCH transmissions and using its QCL parameters for channel estimation and reception of subsequent transmissions. This merging approach maintains reliability while reducing processing complexity by avoiding separate decoding of all K transmissions.

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If all PDCCH candidates are monitored, then detection accuracy is improved, but resource utilization efficiency deteriorates due to overbooking scenarios

Engineering Contradiction:

Improvedetection accuracyVSAvoidresource utilization efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent extracts only the necessary PDCCH candidate for monitoring by selecting a first PDCCH transmission from K associated candidates based on specific criteria (QCL parameters, time-frequency resources). This extraction approach maintains detection accuracy while improving resource utilization by avoiding monitoring of all K candidates in overbooking scenarios.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If separate channel estimation is performed on each PDCCH transmission, then measurement precision is improved, but computational overhead increases

Engineering Contradiction:

Improvechannel estimation precisionVSAvoidcomputational overhead

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent makes the QCL parameters from the first PDCCH transmission universally applicable to subsequent PDCCH transmissions in the associated set. By using the same QCL parameters for channel estimation across multiple transmissions, the patent maintains measurement precision while reducing computational overhead from performing separate estimations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12363731B2Systems and methods for parameter estimation

Publication Date: 2025.07.15 ZTE CORP

AI summary

Presented are systems and methods for parameter estimation. A wireless communication device may determine that a first number of PDCCH transmissions, scheduled from a wireless communication node, that are associated and are PDCCH candidates for blind detection decoding, is K, wherein K is an integer larger than 1. The wireless communication device may determine a second number of PDCCH candidates to be counted for monitoring. The wireless communication device may count the second number of PDCCH candidates for monitoring with respect to the first number of PDCCH transmissions.