PDCCH CORESET Selection for SBFD and Half-Duplex Symbols

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems face inefficiencies and reliability issues when full duplex operation is introduced, as they do not account for the differences in resource allocation between subband full duplex and non-subband full duplex resources, leading to suboptimal PDCCH monitoring and increased power consumption.

Innovation Solution

The method involves determining whether a time resource is a half duplex or full duplex symbol to appropriately allocate frequency resources for PDCCH monitoring, using a first or second CORESET, thereby optimizing resource use and enhancing communication reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the prior art UE operation specification is applied to a wireless communication system with full duplex (SBFD), then the system can support full duplex operation, but resource efficiency deteriorates and communication reliability is compromised

Engineering Contradiction:

Improvefull duplex operation supportVSAvoidcommunication reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the search space into multiple types (first search space and second search space) corresponding to different duplex modes. The UE determines the duplex mode (HD or SBFD) and selects the appropriate search space type, thereby segmenting the PDCCH monitoring process to handle different resource allocation schemes appropriately and maintain communication reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic adaptation mechanisms where the UE dynamically determines the duplex mode based on signaling or configuration, and dynamically selects between different search space types accordingly. This dynamic behavior allows the system to adapt to changing duplex modes while maintaining proper PDCCH monitoring

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

Engineering Contradiction:

Improvefull duplex operation supportVSAvoidresource efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies different search space configurations (first search space for HD, second search space for SBFD) to different local conditions (duplex modes). By matching the search space type to the specific duplex mode, the system optimizes PDCCH monitoring for each local condition, thereby improving overall resource efficiency

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the search space parameters (such as monitoring occasions, frequency resources, and aggregation levels) based on the duplex mode. When SBFD is detected, the UE adjusts the search space parameters to match the SBFD resource allocation scheme, thereby improving resource efficiency

Inventive Principle:

Principle #35Parameter changes

3Reliability

If blind decoding is performed across the entire search space without considering SBFD resources, then the UE can decode PDCCH in all possible locations, but power consumption increases due to unnecessary decoding attempts

Engineering Contradiction:

ImprovePDCCH decoding capabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies partial action by having the UE perform blind decoding only in the relevant search space type corresponding to the current duplex mode. Instead of exhaustively decoding across the entire search space, the UE limits decoding to necessary portions, thereby reducing power consumption while maintaining adequate PDCCH decoding capability

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4712631A1Operation method of device in wireless communication system, and device using method

Publication Date: 2026.03.18 LG ELECTRONICS INC

Figure 1
Figure 2
Figure 3

AI summary

An operation method of a device in a wireless communication system, and the device are provided. The device monitors PDCCH candidates in a CORESET according to a search space, and receives downlink control information through the monitoring. The CORESET is determined as a first CORESET or a second CORESET according to whether a time resource constituting the search space is an HD symbol or an FD Symbol, and the first CORESET and the second CORESET are different CORESETs.