Unlicensed-Band Wireless Reception Through CORESET Placement
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving wireless signals, particularly in unlicensed bands, due to the need for effective configuration of control resource sets and physical downlink shared channels.
Innovation Solution
The method involves configuring control resource sets (CORESET) in front of synchronization signal/physical broadcast channel (SS/PBCH) block candidates, with specific subcarrier spacing settings, to enable efficient reception of downlink signals by user equipment (UE) in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control resource sets (CORESET) are configured in front of SS/PBCH block candidates with specific subcarrier spacing settings, then the efficiency of wireless signal transmission and reception is improved, but the device complexity increases due to additional configuration parameters and procedures
Solution Approach 1:
The patent applies parameter changes by configuring CORESET with specific subcarrier spacing values (15, 30, 60, 120, or 240 kHz) that can be selected based on the frequency range and service requirements. This allows the system to optimize transmission efficiency by adapting subcarrier spacing parameters to different operational conditions while maintaining manageable complexity through standardized parameter sets
Solution Approach 2:
The patent segments the frequency spectrum into different ranges (FR1: 450-7125 MHz and FR2: 24250-52600 MHz) with appropriate subcarrier spacing configurations for each segment. This segmentation allows the system to apply optimized parameters for each frequency range, improving overall efficiency while keeping the complexity localized to each segment rather than requiring complex global optimization
2Reliability
If multiple SS/PBCH block candidates are monitored in unlicensed bands, then the reliability of signal reception is improved, but the loss of time increases due to extended scanning and configuration procedures
Solution Approach 1:
The patent applies preliminary action by pre-configuring CORESET parameters and subcarrier spacing values before actual signal transmission begins. The UE is provided with advance information about the CORESET configuration and supported subcarrier spacing options, allowing it to prepare reception parameters in advance rather than determining them during the scanning process, thus reducing the time loss associated with monitoring multiple SS/PBCH block candidates
Data Source
AI summary
The present disclosure relates to a method and an apparatus therefor, the method comprising the steps of: receiving a synchronization signal/public broadcast channel (SS/PBCH) block within a plurality of SS/PBCH block candidates located on an unlicensed band; obtaining physical downlink control channel (PDCCH) configuration information for receiving system information on the basis of the SS/PBCH block; receiving a PDCCH for scheduling a physical downlink shared channel (PDSCH) including system information on the basis of the PDCCH configuration information; and receiving the PDSCH scheduled by the PDCCH, wherein the PDCCH configuration information includes information on a subcarrier interval of a control resource set (CORESET) through which the PDCCH is transmitted, the CORESET is configured in a period of symbols consecutively located in front of a plurality of SS/PBCH block candidates, and the start symbol of CORESET is determined from between 1) the first symbol of slots included in the period of symbols, or 2) the first symbol of regions in which the period of symbols is divided by the number of SS/PBCH block candidates.