Type0-PDCCH Search Space Configuration for NR-U Time-Domain Placement
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Solution Overview
Problem
The configuration of Type0-PDCCH common search space (CSS) in NR specification is inadequate for unlicensed band operation, particularly for NR-U DSCH, necessitating enhancements for appropriate time-domain location design.
Innovation Solution
The disclosure provides a configuration for Type0-PDCCH CSS in advanced wireless communication systems, specifically for NR-U, to optimize the time-domain location for unlicensed band operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the Type0-PDCCH CSS configuration is designed for licensed band operation according to NR specification, then the configuration is simple and follows standard procedures, but the time-domain location is not appropriate for unlicensed band operation especially for NR-U DSCH
Solution Approach 1:
The patent applies local quality by introducing band-specific configuration parameters (ssb-PositionsInBurst and subcarrierOffset) that are tailored specifically for unlicensed band operation. These localized parameter adjustments allow the Type0-PDCCH CSS to function appropriately in NR-U DSCH scenarios without requiring a complete redesign of the overall configuration framework, thus improving adaptability while controlling complexity.
Solution Approach 2:
The patent employs parameter changes by modifying key configuration parameters such as frequencyOffset, ssb-PositionsInBurst, and subcarrierOffset to accommodate unlicensed band characteristics. These parameter adjustments enable the Type0-PDCCH CSS to adapt to the specific requirements of NR-U DSCH operation, resolving the contradiction between maintaining standard simplicity and achieving unlicensed band adaptability.
2Reliability
If the time-domain location of Type0-PDCCH CSS is optimized for NR-U DSCH operation, then the system performance in unlicensed bands is improved, but the configuration becomes more complex and deviates from standard NR specification
Solution Approach 1:
The patent applies dynamics by making the Type0-PDCCH CSS configuration adaptive rather than static. The configuration parameters are dynamically adjusted based on the operating band and DSCH requirements, allowing the system to optimize performance for unlicensed bands while maintaining a standardized baseline configuration for licensed bands. This dynamic approach improves reliability in NR-U scenarios without permanently increasing overall system complexity.
3Ease of operation
If the Type0-PDCCH CSS configuration follows the standard NR specification with 4 bits indication in PBCH, then the configuration is straightforward and easy to implement, but it is inadequate for unlicensed band operation particularly for NR-U DSCH
Solution Approach 1:
The patent applies universality by designing a configuration framework that serves multiple functions: it maintains compatibility with standard NR specification for licensed band operation while simultaneously supporting NR-U DSCH operation in unlicensed bands. The enhanced configuration structure can universally accommodate both licensed and unlicensed band requirements, improving reliability for unlicensed operations without completely sacrificing ease of operation through the maintained 4-bit indication mechanism.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of a UE in a wireless communication system supporting a shared spectrum channel access is provided.