Cooperative RF Sensing With Timing Alignment for Obstructed Links
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Solution Overview
Problem
Mobile communication systems face challenges in accurately sensing objects that obstruct direct propagation paths between devices, leading to negative impacts on communication quality, and existing technologies lack effective methods for integrating sensing and communication with timing alignment.
Innovation Solution
The integration of RF signals with both communication and sensing components, utilizing timing information for frame alignment and synchronization, enables accurate sensing and communication by transmitting RF signals with timing advance adjustments and common frame timing indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RF signals are transmitted without timing alignment, then device complexity is reduced, but sensing accuracy deteriorates
Solution Approach 1:
The patent merges communication and sensing functions into a unified RF signal transmission system. By combining both functions and implementing timing alignment mechanisms, the system achieves accurate sensing while maintaining communication capabilities, resolving the contradiction between sensing accuracy and device complexity through functional integration.
Solution Approach 2:
The patent applies preliminary timing advance adjustments before signal transmission. By pre-calculating and applying timing offsets based on estimated propagation delays, the system ensures that sensing signal components are transmitted with proper timing alignment, improving sensing accuracy without requiring complex real-time alignment procedures.
2Loss of time
If separate sensing and communication systems are used, then system versatility is improved, but loss of time increases
Solution Approach 1:
The patent combines sensing and communication operations into a single integrated RF signal transmission process. By multiplexing sensing signal components within the same time-frequency resources as communication signals and applying unified timing alignment, the system eliminates the time loss associated with separate operations while maintaining full functionality for both sensing and communication.
Solution Approach 2:
The patent creates a universal RF signal transmission system that performs both sensing and communication functions simultaneously. The system uses a single transmission apparatus that can generate, modulate, and transmit both communication symbols and sensing signal components with proper timing alignment, achieving multi-functionality without time penalty.
3Measurement precision
If timing information is not included in RF signals, then signal simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The patent incorporates timing information into the RF signal structure in advance. By embedding timing advance values and frame timing indications within the transmitted signals, the system provides precise timing data for sensing operations without requiring complex post-processing or additional separate timing signals.
Data Source
AI summary
Communication systems, apparatuses, methods, and one or more non-transitory computer-readable storage devices for integrated sensing and communication employs the steps of: transmitting a radio-frequency (RF) signal. The RF signal has one or more communication symbols for communication and one or more sensing signal components for sensing an object, and the RF signal has timing information for the one or more sensing signal components.