Wireless Beam Scheduling for Joint Communication and Sensing
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Solution Overview
Problem
Existing joint communication and sensing (JCAS) technologies face challenges in achieving high sensing performance while maintaining resource efficiency and communication performance, as conventional communication signals are not optimized for sensing, and dedicated sensing signals compromise resource usage.
Innovation Solution
A system and method that schedules frequency and time resources, and determines beam characteristics for wireless communication signals based on sensing requirements, using existing communication technologies like LTE and 5G, to enhance sensing performance without significantly impacting communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated sensing signal is used for sensing, then sensing performance is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies multi-functionality by enabling communication signals to serve dual purposes: maintaining their primary communication function while simultaneously being utilized for sensing operations. The system configures communication signals with specific parameters (waveform, bandwidth, time-frequency resources) that allow them to be processed for both communication data transmission and sensing target detection, thereby eliminating the need for separate dedicated sensing signals and improving resource efficiency.
2Productivity
If a same radio signal is designed for both communication and sensing, then resource efficiency is improved, but sensing performance deteriorates
Solution Approach 1:
The patent applies local quality by configuring specific portions or characteristics of the communication signal to be suitable for sensing while maintaining the overall communication signal integrity. The system adjusts local signal parameters such as waveform type, bandwidth allocation, and time-frequency resource distribution in specific regions of the signal to enhance sensing capability without compromising the global communication performance, thereby achieving both resource efficiency and adequate sensing performance.
3Productivity
If conventional communication signals are used for sensing, then resource efficiency is improved, but sensing performance deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying specific parameters of conventional communication signals to enhance their sensing capability. The system adjusts parameters including waveform type (e.g., OFDM, SC-FDMA), bandwidth allocation, time-frequency resource distribution, and power allocation to optimize the signals for dual communication and sensing functions. These parameter modifications enable conventional communication signals to achieve improved sensing performance while maintaining resource efficiency.
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
Achieves high sensing performance with minimal impact on communication performance by optimizing resource allocation and beam characteristics for both communication and sensing tasks.
Implementation Method 1
The JCAS node emits a radio signal, which is reflected by objects in the neighborhood and the reflected signals are received by a receiver
Data Source
AI summary
A system (1) for sensing one or more objects (21-23) is configured to obtain sensing requirements for sensing the one or more objects, schedule frequency and time resources and/or determine beam characteristics of beams for transmissions of wireless communication signals which include communication pay load data to a specific further system (11-13) based on the sensing requirements, transmit the wireless communication signals to the further system on the scheduled frequency and time resources and/or via the beams with the determined beam characteristics, and obtain received signals upon transmitting the wireless communication signals. The received signals comprise received versions of the transmitted wireless communication signals and reflect an impact of the one or more objects on the transmitted wireless communication signals. The system is further configured to determine, or enable to determine, one or more physical properties of each of the objects based on the characteristics of the received signals.