PDCCH Candidate Positioning for Multi-Carrier CCE Detection

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Solution Overview

Problem

Current wireless communication technologies are limited in determining the starting control channel element (CCE) position for multiple scheduled carriers in multi-carrier scheduling, particularly in scenarios where control signaling and scheduled data information are on different carriers.

Innovation Solution

A method is provided to determine the frequency-domain position of a PDCCH candidate by calculating a starting CCE position using offsets for multiple scheduled carriers, which involves receiving RRC signaling with configuration parameters and applying formulas based on aggregation levels and CCE counts, while considering activation states and carrier groups.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multi-carrier scheduling is used to schedule data information on multiple carriers through control signaling, then the scheduling flexibility and resource utilization are improved, but the ability to determine starting CCE positions for multiple scheduled carriers deteriorates

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidCCE position determination

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent divides the carrier configuration into multiple carrier groups, where each carrier group is associated with a specific offset value. This segmentation allows the terminal to determine CCE positions for multiple carriers by processing each carrier group independently, thereby solving the complexity of determining starting CCE positions for multiple scheduled carriers simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces offset values as intermediary parameters that link the control signaling to the specific CCE positions of scheduled carriers. These offsets act as mediators that enable the terminal to calculate the correct starting CCE positions for multiple carriers based on the control signaling, thus resolving the determination difficulty.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the terminal monitors PDCCH for multiple carriers, then the coverage and detection capability are improved, but the complexity of determining starting CCE positions increases

Engineering Contradiction:

Improvedetection capabilityVSAvoidCCE position determination complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

By segmenting the carrier configuration into multiple carrier groups with associated offset values, the patent simplifies the CCE position determination process. The terminal can systematically process each carrier group separately, reducing the overall complexity while maintaining comprehensive detection capability across multiple carriers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent utilizes offset values as key parameters that change based on carrier group configuration. By adjusting these offset parameters, the system can adapt to different carrier configurations without increasing the fundamental complexity of the determination process, thus maintaining reliable detection while managing complexity.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If cross-carrier scheduling is implemented where control signaling and scheduled data information are on different carriers, then the resource allocation flexibility is improved, but the difficulty of determining starting CCE positions for multiple carriers increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidstarting CCE position determination

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces offset values as intermediary parameters that bridge the control signaling and the actual CCE positions of scheduled carriers in cross-carrier scheduling scenarios. These offsets enable the terminal to accurately determine starting CCE positions for multiple carriers even when control signaling and data are on different carriers, thus resolving the determination difficulty while maintaining resource allocation flexibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the cross-carrier scheduling configuration into carrier groups with specific offset values. This segmentation allows the terminal to handle complex cross-carrier scenarios by processing each carrier group independently, thereby determining starting CCE positions for multiple carriers without being overwhelmed by the overall complexity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20260032691A1Method for determining frequency-domain position of pdcch candidate, and terminal

Publication Date: 2026.01.29 DATANG MOBILE COMM EQUIP CO LTD

AI summary

The present application discloses a method for determining a frequency-domain position of a PDCCH candidate, which are used to propose a method for determining a starting CCE position of a PDCCH candidate corresponding to multiple scheduled carriers under multi-carrier scheduling. The method includes: determining an offset corresponding to a first carrier group, where the first carrier group includes at least one carrier, and the first carrier group is configured for multi-carrier scheduling; determining a starting control channel element CCE position of a physical downlink control channel PDCCH candidate corresponding to the first carrier group according to the offset corresponding to the first carrier group.