OFDMA Frame Allocation for Joint Communication and Radio Sensing
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Solution Overview
Problem
Existing methods for spatial sensing in surrounding areas, such as using cameras, infrared, ultrasound, and radio waves, lack efficiency and accuracy in detecting objects and environments.
Innovation Solution
A transmitting apparatus that configures frames using orthogonal frequency-division multiple access (OFDMA) to include resources for communication and sensing, allowing for precise spatial sensing via radio waves, with guard intervals to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sensing resources are allocated in time or frequency, then sensing accuracy is improved, but communication resource efficiency deteriorates due to resource waste
Solution Approach 1:
The patent combines communication and sensing functions into a shared OFDMA frame structure. Communication data and sensing signals are multiplexed in the same time-frequency resources using orthogonal codes, allowing both functions to operate simultaneously without requiring separate dedicated resources, thus improving resource efficiency while maintaining sensing accuracy
Solution Approach 2:
The patent creates a universal frame structure that serves dual purposes: carrying communication data and enabling sensing operations. The same radio frequency resources are used for both communication transmission and sensing signal transmission, making the system multi-functional and eliminating the need for separate sensing hardware or dedicated sensing time slots
2Reliability
If dedicated sensing time slots are introduced, then sensing reliability is improved, but communication latency increases due to time resource fragmentation
Solution Approach 1:
The patent enables continuous simultaneous operation of communication and sensing functions within the same OFDMA frame. By using code division multiplexing, both communication data transmission and sensing signal transmission occur continuously without interruption or time slot allocation, eliminating communication latency caused by dedicated sensing time slots while ensuring sensing reliability
3Measurement precision
If sensing signals are transmitted separately, then sensing precision is improved, but energy consumption increases
Solution Approach 1:
The patent merges sensing signal transmission with communication data transmission in the same OFDMA frame. The sensing signals are embedded within the communication frame structure and transmitted using the same radio frequency resources and power amplification chain, eliminating the need for separate dedicated sensing transmission events and reducing overall energy consumption while maintaining sensing precision
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
Enables accurate detection of objects and environments by combining communication and sensing functions, improving reliability and accuracy of spatial sensing results.
Implementation Method 1
a frame configuration unit configured to configure a frame conforming to orthogonal frequency-division multiple access (OFDMA) and including a plurality of time-frequency resources
Implementation Method 2
a method of detecting light, infrared light, ultrasound waves that have reflected off something in the surrounding area
Data Source
AI summary
A transmitting apparatus includes: a frame configuration unit that configures a frame conforming to orthogonal frequency-division multiple access (OFDMA) and including a plurality of time-frequency resources, each being a resource defined by time and frequency; and a transmitter that transmits the frame configured by the frame configuration unit over radio waves. The frame configuration unit configures, as the frame, a frame including a resource for communication and a resource for sensing, the resource for communication being a time-frequency resource in which a symbol including communication data is disposed, and the resource for sensing being a time-frequency resource in which a symbol for sensing via radio waves transmitted by the transmitter is disposed.