Base Station CORSET Configuration for Lower-Power DCI Detection

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Solution Overview

Problem

In New Radio Access Technology (NRAT), User Equipment (UE) monitoring multiple Control Resource Sets (CORSETs) for downlink control channel increases power consumption and probability of erroneous detection due to increased candidates for PDCCH regions.

Innovation Solution

A base station dynamically configures and indicates, via higher-layer and dynamic signaling, a combination of CORSETs for UE monitoring, reducing unnecessary monitoring and power consumption while enhancing detection accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a UE monitors multiple CORSETs for PDCCH regions, then the coverage and reliability of control channel reception is improved, but the power consumption and probability of erroneous detection increase

Engineering Contradiction:

Improvecontrol channel reception reliabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic switching between multiple CORSET configurations based on operational conditions. The base station configures multiple CORSETs with different parameters (frequency locations, bandwidths, time resources) and the UE dynamically selects which CORSET to monitor based on received indications, thereby adapting the monitoring behavior to current channel conditions and traffic requirements, improving reliability without continuous full-power monitoring of all CORSETs

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key parameters of control channel monitoring including frequency location, bandwidth, time resources, and aggregation levels across different CORSET configurations. By varying these parameters dynamically based on channel conditions and traffic types, the system optimizes the balance between detection reliability and power consumption, allowing the UE to switch between conservative (higher power, higher reliability) and aggressive (lower power, lower reliability) monitoring modes

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a UE monitors multiple CORSETs for PDCCH regions, then the coverage and reliability of control channel reception is improved, but the probability of erroneous detection increases

Engineering Contradiction:

Improvecontrol channel reception reliabilityVSAvoidDCI detection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies different monitoring strategies to different CORSETs based on their specific characteristics and intended purposes. Each CORSET can be optimized for specific conditions (e.g., wide bandwidth for high data rates, frequency-diversity patterns for poor channel conditions), and the UE applies appropriate detection algorithms and thresholds locally to each CORSET type, improving overall detection accuracy while managing the complexity of monitoring multiple regions

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If multiple control channel regions are configured for UE monitoring, then the adaptability to different use cases is improved, but the device complexity increases

Engineering Contradiction:

Improveuse case adaptabilityVSAvoidUE monitoring complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a universal CORSET configuration framework that can serve multiple use cases (eMBB, mMTC, URLLC) through a single set of configuration mechanisms. The same RRC signaling and DCI structures are used across different service types, with the flexibility to adjust parameters within the unified framework, thereby achieving multi-functionality without proportionally increasing complexity for each specific use case

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent segments the control channel monitoring function into distinct CORSET configurations, each optimized for specific scenarios (e.g., one CORSET for wideband eMBB traffic, another for narrowband mMTC, another for low-latency URLLC). This segmentation allows the UE to activate only the relevant segments based on current service requirements, reducing the effective complexity compared to a monolithic monitoring approach that must handle all cases simultaneously

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250274243A1Base station, terminal, and communication method

Publication Date: 2025.08.28 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

UEs each monitor a search space in multiple CORSETs and appropriately detect a DCI. In a base station (100), a DCI generator (102) selects one of multiple cases each indicating a combination of CORSETs to be monitored by a terminal (200) among multiple control channel regions (CORSETs). A transmitter (106) indicates, by higher-layer signaling, configuration information indicating the multiple cases, and indicates the selected case by dynamic signaling.