RIS Angle-Difference Sensing for Low-Latency JCAS Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving high data rates, low latency, and efficient energy consumption, particularly in the context of 6G wireless communication systems, which require advanced technologies for seamless integration of AI, THz communication, and reconfigurable intelligent surfaces to support ubiquitous connectivity and intelligent connectivity.
Innovation Solution
The implementation of reconfigurable intelligent surfaces (RIS) in joint communication and sensing (JCAS) systems, utilizing angle differences and time regions for inter-device reference signals to enhance wireless communication and sensing capabilities, integrating AI for efficient resource management and THz communication for high data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reconfigurable intelligent surfaces are deployed to enhance wireless communication and sensing capabilities, then data rates and connectivity are improved, but system complexity and device configuration requirements increase
Solution Approach 1:
The patent introduces a third device as an intermediary that generates and provides angle difference information to both the first and second devices. This intermediary role simplifies the overall system complexity by centralizing the angle difference generation function, eliminating the need for complex peer-to-peer angle calculations between communicating devices, and enabling the reconfigurable intelligent surface to be configured more efficiently through reference signal measurements.
2Measurement precision
If angle differences are calculated between multiple reference signals for RIS configuration, then sensing precision and communication accuracy are improved, but time consumption and processing delay increase
Solution Approach 1:
The patent implements preliminary action by having the third device generate and provide angle difference information before the actual RIS configuration and communication establishment. The angle differences are pre-calculated based on reference signal measurements, allowing the RIS to be quickly configured without real-time angle calculations during communication, thereby reducing processing delay while maintaining sensing precision.
3Measurement precision
If inter-device reference signals are transmitted for angle measurement, then positioning accuracy and sensing capability are improved, but energy consumption increases
Solution Approach 1:
The patent applies universality by designing the inter-device reference signals to serve multiple functions simultaneously: they enable angle measurement for positioning accuracy, provide input for angle difference calculation, and support RIS configuration. This multi-functionality reduces the need for separate signaling procedures, thereby lowering overall energy consumption while maintaining positioning accuracy.
4Reliability
If reconfigurable intelligent surfaces are used to extend network coverage and support ubiquitous connectivity, then connectivity availability is improved, but network complexity and coordination requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the network into distinct functional components: user devices (first and second devices), a dedicated third device for angle difference generation, and the reconfigurable intelligent surface. This segmentation allows each component to perform its specific function independently, simplifying network coordination and reducing overall complexity while improving connectivity availability through the collaborative RIS configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances wireless communication and sensing capabilities, achieving high data rates, low latency, and efficient energy consumption, supporting intelligent connectivity and ubiquitous connectivity in 6G systems.
Implementation Method 1
reconfigurable intelligent surfaces (RIS) in joint communication and sensing (JCAS) systems
Data Source
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AI summary
Proposed is an operational method of a first device (100) in a wireless communication system. The method comprises the steps of: receiving, in a first time domain, a first inter-device reference signal from a second device (200), on the basis of a first angle; and transmitting, in the first time domain, a second inter-device reference signal, on the basis of a second angle obtained by applying a first angular difference to the first angle, wherein one or more angle differences including the first angular difference may be associated with one or more time domains, respectively.