Narrowband CORESET Detection via Extended Search Space Sets

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Solution Overview

Problem

Existing communication networks face challenges in detecting initial access information in narrowband communication scenarios, particularly at bandwidths below 5 MHz, where signals and channels were not initially designed for such narrow channels, affecting detection performance.

Innovation Solution

An apparatus and method that identify a special configuration for the control resource set of index 0 (CORESET #0) to determine an extended search space set, enhancing the detection of initial access information by monitoring CORESETs based on this configuration, especially in narrow transmission bandwidths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If NR signals and channels are transmitted in narrow channels below 5 MHz, then bandwidth utilization is improved, but detection performance of initial access information deteriorates

Engineering Contradiction:

Improvebandwidth utilizationVSAvoiddetection performance

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The search space is divided into multiple search space sets, each configured with different parameters. The UE can monitor multiple search space sets simultaneously, increasing the probability of successfully detecting initial access information in narrowband conditions where the channel may not support reliable detection across the entire search space.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different search space sets are configured with different local qualities (e.g., different monitoring occasions, different candidate numbers, different aggregation levels) to adapt to the specific narrowband channel conditions. This allows the system to optimize detection performance for specific regions of the search space rather than using a uniform configuration.

Inventive Principle:

Principle #3Local quality

2Reliability

If the search space configuration is extended to improve detection coverage, then detection performance is improved, but device complexity increases

Engineering Contradiction:

Improvedetection coverageVSAvoidsearch space monitoring complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The search space configuration is made dynamic through the introduction of multiple search space sets that can be selectively activated. The UE monitors multiple search space sets with different configurations, allowing the system to adapt to varying channel conditions while managing complexity through structured configuration parameters.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Different search space sets are configured with different parameters (monitoring occasions, candidates per aggregation level, aggregation levels themselves). By changing these parameters across multiple search space sets, the system improves detection coverage without requiring a single overly complex configuration, as each search space set can be independently optimized.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20240396693A1Detection of a control resource set in a communication network

Publication Date: 2024.11.28 NOKIA TECHNOLOGIES OY

AI summary

There is provided an apparatus for detecting a control resource set of index 0. CORESET #0, which is configured to carry information for initial access to a communication network. The apparatus is configured to identify a special configuration for at least one search space associated to the CORESET #0, and the apparatus is configured to determine an extended search space set based on the identified special configuration.