RIS Control Signal Design for 6G Wireless Coverage
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Solution Overview
Problem
The 6G communication system faces challenges in securing signal coverage due to severe path loss and atmospheric absorption in the terahertz band, necessitating innovative technologies for reconfigurable intelligent surfaces (RIS) to enhance wireless communication efficiency and coverage.
Innovation Solution
A method and device for designing a reconfigurable intelligent surface (RIS) control signal, where a network entity receives RIS reflective pattern information and configuration information from a base station to control the reflective pattern of the RIS, including slot offset, symbol-specific patterns, and signal-specific settings, enabling dynamic control of reflective patterns for improved signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RIS reflective pattern information is transmitted for each symbol in every slot, then the adaptability of RIS control is improved, but the signaling overhead increases
Solution Approach 1:
The patent segments RIS control information into two parts: (1) RIS control parameter information transmitted via MAC CE for dynamic adaptation, and (2) RIS reflective pattern information transmitted via DCI for precise symbol-level control. This segmentation allows the system to achieve fine-grained RIS control while managing signaling overhead by using different transmission mechanisms for different types of control information.
Solution Approach 2:
The patent employs preliminary action by pre-configuring RIS control parameter information through MAC CE before actual transmission. This allows the base station to prepare RIS control configurations in advance, reducing the amount of information that needs to be transmitted dynamically and thereby reducing signaling overhead during critical data transmission phases.
2Manufacturing precision
If RIS control signal includes detailed configuration information for each reflective pattern, then the control precision is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by providing detailed RIS reflective pattern information only when and where it is needed - specifically through DCI transmission for active data transmission symbols. For other symbols or less critical control scenarios, the system relies on pre-configured MAC CE parameters. This localized provision of detailed information maintains control precision for critical operations while avoiding unnecessary complexity in signal processing for all symbols.
Solution Approach 2:
The patent implements dynamic RIS control where the level of detail in control information varies based on transmission requirements. The system dynamically switches between using pre-configured MAC CE parameters and detailed DCI-based reflective pattern information, allowing the control precision and complexity to adapt to the specific transmission scenario rather than maintaining maximum complexity consistently.
3Productivity
If RIS reflective patterns are updated frequently for each symbol, then the transmission efficiency is improved, but the processing speed requirement increases
Solution Approach 1:
The patent implements periodic action by updating RIS reflective patterns at specific intervals and for specific symbol types rather than continuously for every symbol. MAC CE provides periodic updates for control parameters, while DCI provides updates only for symbols requiring detailed reflective pattern control. This periodic update mechanism improves transmission efficiency by ensuring RIS is properly configured when needed, while reducing processing speed requirements by avoiding continuous updates for all symbols.
Data Source
AI summary
Disclosed is a network entity including a transceiver; a memory storing one or more instructions; and at least one processor configured to execute the one or more instructions stored in the memory, wherein the at least one processor is configured to receive, from a base station (BS), a reconfigurable intelligent surface (RIS) control signal including RIS reflective pattern information and configuration information for the RIS reflective pattern information, and control a reflective pattern of an RIS based on the RIS reflective pattern information and the configuration information for the RIS reflective pattern information.