Flexible Numerology Control Channel for Wireless Systems
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Solution Overview
Problem
Current wireless communication systems lack flexibility in control channel numerology, which limits their ability to efficiently manage subcarrier spacing and symbol period duration, affecting communication quality and resource utilization, especially in diverse user equipment (UE) scenarios.
Innovation Solution
The introduction of a New Radio (NR) control channel with flexible numerology, allowing for combinations of subcarrier spacing and symbol period duration, enabling UE-specific configurations and dynamic changes in control channel numerology to optimize communication parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed control channel numerology is used, then the system structure is simple and easy to implement, but the system lacks flexibility in managing subcarrier spacing and symbol period duration, affecting communication quality and resource utilization
Solution Approach 1:
The patent implements dynamic control channel numerology by allowing the network to configure different subcarrier spacing values (e.g., 15 kHz, 30 kHz, 60 kHz) and symbol period durations based on UE-specific requirements and channel conditions. The control channel can switch between different numerology configurations dynamically, enabling the system to adapt to varying communication scenarios while maintaining a standardized base configuration framework.
Solution Approach 2:
The patent changes key numerical parameters of the control channel including subcarrier spacing (scs) values and symbol period durations. By allowing these parameters to be configured flexibly through RRC signaling and DCI indicators, the system can optimize control channel performance for different UE positions, mobility scenarios, and communication requirements without fundamentally changing the control channel structure.
2Productivity
If UE-specific numerology configurations are implemented, then communication efficiency is improved, but the complexity of managing multiple numerologies increases
Solution Approach 1:
The patent applies UE-specific numerology configurations where each user equipment can be assigned tailored subcarrier spacing and symbol period values based on its specific requirements such as position, mobility state, and service type. This localized optimization allows high-efficiency communication for each UE while the network manages multiple configurations through standardized signaling mechanisms, preventing overall system complexity from becoming unmanageable.
Solution Approach 2:
The patent segments the control channel management into different configuration layers: base numerology configurations defined in specifications, UE-specific configurations through RRC signaling, and dynamic indicators through DCI. This segmentation allows the system to handle multiple numerologies efficiently by processing them at appropriate granularity levels, reducing the complexity burden on any single component.
3Quantity of substance
If flexible subcarrier spacing and symbol period duration are used, then resource utilization is improved, but the difficulty of detecting and measuring control channel parameters increases
Solution Approach 1:
The patent employs preliminary configuration of control channel numerology parameters through RRC signaling before actual control channel transmission. The network pre-configures the UE with possible numerology options and their corresponding parameters, so when the control channel is transmitted with a specific numerology, the UE is already prepared to detect and measure the correct parameters, significantly reducing the detection difficulty despite the flexibility in parameter choices.
Solution Approach 2:
The patent introduces intermediary signaling mechanisms (RRC configuration messages and DCI indicators) that mediate between the network's resource allocation decisions and the UE's parameter detection processes. These intermediaries carry the numerology configuration information and indicators, allowing the UE to correctly interpret and measure control channel parameters without directly facing the complexity of multiple possible configurations.
Data Source
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AI summary
Techniques are described for wireless communication. One method for wireless communication includes transmitting, to a user equipment (UE), an indication of a control channel subcarrier spacing to be used by the UE; and transmitting a control message having a subcarrier spacing in accordance with the indication. Another method for wireless communication includes transmitting, to a UE, an indicator channel identifying at least a subcarrier spacing to be used in one or more subsequent control channels. One or more subsequent control channels are then transmitted in accordance with the subcarrier spacing indicated by the indicator channel.