Wireless Sensing via Trigger Frame Pilot Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face limitations in obtaining accurate sensing information about surrounding objects due to the inefficiencies in channel state information acquisition, particularly with the use of midamble sequences and null data packets, which compromise both communication and sensing performance.
Innovation Solution
A method involving a measurement station and a signal source station connected through wireless communication, where the measurement station sends a trigger frame with pilot format information to the signal source station, allowing the analysis of channel state information in the illumination frame to obtain comprehensive sensing information, thereby improving sensing performance without reducing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If midamble sequences are used to obtain channel state information for sensing, then sensing performance is improved, but wireless transmission efficiency deteriorates
Solution Approach 1:
The patent applies multi-functionality by enabling pilot sequences to serve dual purposes: traditional communication functions (channel estimation, equalization) and sensing functions (obtaining channel state information for inferring object characteristics). The measurement station utilizes the same pilot sequences transmitted for communication to extract sensing information, eliminating the need for separate sensing signals and resolving the contradiction between sensing performance and transmission efficiency.
2Measurement precision
If null data packets are used for sensing, then sensing capability is enhanced, but communication efficiency is reduced
Solution Approach 1:
The patent merges communication and sensing operations by having the measurement station obtain channel state information from pilot sequences embedded within normal communication data packets. Instead of using separate null data packets that interrupt communication, the sensing function is integrated into the regular data transmission flow, allowing both communication and sensing to occur simultaneously without compromising either.
3Measurement precision
If pilot format information is analyzed for sensing, then sensing accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies self-service by having the measurement station autonomously extract and analyze pilot format information from received signals to obtain channel state information. The system uses its own communication infrastructure and signals to perform sensing operations without requiring additional external sensing equipment or complex dedicated sensing protocols, thereby improving sensing accuracy while maintaining manageable system complexity.
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
This approach enhances the capability of wireless communication devices to sense their environment while maintaining efficient data transmission by allowing for advanced analysis of channel state information and physical object characteristics, such as velocity and shape, through the use of pilot format information in the illumination frame.
Implementation Method 1
During propagation, a radio signal reaches a receiver after being reflected by a surrounding object. The receiver obtains physical characteristics (for example, a signal transmission time and a signal frequency) of the radio signal through parsing to infer information such as a location, a velocity, and an orientation of the surrounding object
Data Source
AI summary
A method includes, in accordance with some implementations, sending, a measurement station, a trigger frame to a signal source station, where the trigger frame carries pilot format information, and the pilot format information is used to indicate a sending time point of a signal frame triggered by the trigger frame, a quantity of times for sending the signal frame, and a transmission mode of pilot information in the signal frame. The measurement station receives an illumination frame from the signal source station, where the illumination frame is the signal frame triggered by the trigger frame. The measurement station analyzes pilot information in the illumination frame to obtain sensing information in the illumination frame, where the sensing information is used to indicate physical information of an object surrounding the signal source station and the measurement station.