PDCCH CORESET Structure Using OFDM Symbol Groups for Coverage
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing wireless signal transmission and reception, particularly in high-frequency bands where coverage loss and radio channel characteristics such as delay spread and phase noise impact signal integrity.
Innovation Solution
The proposed solution involves an OFDM symbol group (OSG)-based physical channel structure and configuration method that compensates for coverage loss due to large subcarrier spacings, considering radio channel characteristics and beam switching operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large subcarrier spacings are used in high-frequency bands, then bandwidth utilization is improved, but coverage loss occurs
Solution Approach 1:
The patent segments the OFDM symbol structure by introducing OSG (OFDM Symbol Group) as a new unit that groups multiple OFDM symbols together. This segmentation allows the system to maintain larger subcarrier spacings for bandwidth efficiency while compensating for coverage loss through the grouped symbol structure that can apply different processing or repetition strategies within the group.
Solution Approach 2:
The patent changes the fundamental parameter of symbol grouping by defining OSG as a new structural unit comprising multiple OFDM symbols. This parameter change enables the system to adjust the effective coverage by modifying the OSG configuration (number of symbols per group, mapping patterns) while maintaining the beneficial large subcarrier spacing for bandwidth utilization.
2Device complexity
If conventional OFDM structure is used, then system complexity is kept simple, but signal integrity deteriorates under high-frequency channel impairments
Solution Approach 1:
The patent segments the conventional OFDM symbol into OSG units that group multiple symbols together. This segmentation introduces a new structural layer that can handle channel impairments more effectively while maintaining relatively simple system architecture by building upon existing OFDM fundamentals rather than completely redesigning the system.
Solution Approach 2:
The patent adds a new dimensional structure by introducing OSG as an intermediate layer between individual OFDM symbols and higher-layer protocols. This dimensional change (from symbol-level to OSG-level organization) provides additional degrees of freedom for handling channel impairments while keeping the base OFDM structure intact.
Data Source
AI summary
The present disclosure relates to a wireless communication system and, particularly, to a method and an apparatus therefor, the method comprising the steps of: receiving CORESET configuration information; monitoring a plurality of PDCCH candidates inside a CORESET on the basis of the CORESET configuration information; and detecting a PDCCH from among the plurality of PDCCH candidates, wherein each PDCCH candidate includes one or more CCEs, each CCE includes a plurality of REGs, and one REG is defined by N(>1) continuous OFDM symbols and M(>1) continuous REs.