NR Control Channel Scheduling for Scalable Numerology
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Solution Overview
Problem
Current wireless communication systems, particularly the 3GPP New Radio (NR) system, face challenges in supporting scalable numerology to meet the requirements of various scenarios and service needs, such as higher frequency bands, faster movement rates, and lower latency, as defined by the 'IMT for 2020 and beyond' program, without a detailed method for scalable numerology support.
Innovation Solution
The method involves a terminal receiving scheduling information for data transmission or reception from a base station, which provides information on physical resources supporting different subcarrier spacings within a time interval, allowing for data transmission or reception based on scheduling information for multiple numerologies, including specific subcarrier spacing values and cyclic prefix lengths, to enable flexible numerology support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single numerology is used in the NR system, then system simplicity is maintained, but the system cannot meet diverse service requirements and various scenarios
Solution Approach 1:
The patent implements dynamic numerology selection where the base station can configure different subcarrier spacings and cyclic prefix lengths based on service requirements. The system dynamically switches between different numerologies (e.g., 15kHz for eMBB, 30kHz for URLLC) within the same NR system, allowing adaptability to diverse scenarios while maintaining a unified system framework.
Solution Approach 2:
The patent changes key physical layer parameters (subcarrier spacing and cyclic prefix length) to support different numerologies. By varying these parameters, the system can accommodate different service requirements (eMBB, URLLC, mMTC) without creating entirely separate systems, thus achieving versatility with controlled complexity.
2Adaptability or versatility
If multiple subcarrier spacings are supported, then scalable numerology for various scenarios is enabled, but control channel and data channel scheduling becomes more complex
Solution Approach 1:
The patent segments the physical resources into different numerology-specific resources. The base station configures multiple physical resources with different subcarrier spacings and cyclic prefix lengths, and separately schedules control channels and data channels for each numerology type. This segmentation allows manageable complexity while supporting scalable numerology.
Solution Approach 2:
The patent creates a universal scheduling framework that can handle multiple numerologies through a common resource configuration mechanism. The base station uses unified RRC signaling to configure multiple physical resources with different numerologies, and the terminal can efficiently process scheduling information for various subcarrier spacings using the same fundamental procedures.
3Reliability
If different cyclic prefix lengths are configured for different subcarrier spacings, then optimal performance for various scenarios is achieved, but resource configuration and management becomes more difficult
Solution Approach 1:
The patent systematically varies cyclic prefix length parameters based on subcarrier spacing configurations. For example, it configures normal cyclic prefix for 15kHz subcarrier spacing and extended cyclic prefix for 30kHz subcarrier spacing. This parameter coordination optimizes transmission reliability for different scenarios while providing clear configuration rules that simplify resource management.
Data Source
AI summary
Provided is a scheduling information transmission/reception method and apparatus for an NR system in a wireless communication system. A method for receiving, by a terminal, scheduling information for data transmission or reception in a wireless communication system according to one aspect of the present invention may comprise the steps of: receiving, from a base station, information indicating a first physical resource supporting a first subcarrier spacing within a time interval and a second physical resource supporting a second subcarrier spacing within the time interval; receiving at least one of first scheduling information for the first physical resource and second scheduling information for the second physical resource; and performing the data transmission or reception on the basis of the at least one of the first scheduling information and the second scheduling information.