Adaptive Radar Resource Allocation for Joint Communication and Sensing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently determining resources for joint communication and sensing (JCAS) technologies, particularly in managing radar resources and communication resources, and there is a need for improved methods to adapt resource allocation based on user environment and radar signal parameters.
Innovation Solution
A method and device for determining resources in a wireless communication system that involves receiving synchronization signals, sensing the user environment, and adaptively determining radar signal resources based on environmental and radar signal parameters, allowing for joint communication and sensing (JCAS) within the same frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate frequency resources are allocated for communication and radar sensing, then reliability of each function is improved, but productivity (spectral efficiency) deteriorates due to resource waste
Solution Approach 1:
The patent merges communication signals and radar sensing signals into a single composite signal that occupies the same frequency resources. The communication signal includes data transmission components while the radar signal includes ranging and velocity measurement components. By combining these functions in the same frequency band, the system achieves spectral efficiency improvement while maintaining the reliability of both communication and sensing operations through careful signal design and resource allocation.
Solution Approach 2:
The patent implements multi-functionality by designing a unified signal structure that simultaneously performs communication data transmission and radar sensing functions. The same frequency resources are used for both purposes, with the signal containing both communication data elements and radar measurement elements. This universal approach allows the system to achieve multiple objectives (communication and sensing) using a single resource allocation, thereby improving spectral efficiency.
2Measurement precision
If radar signal resources are increased to improve sensing precision, then measurement precision improves, but loss of energy increases due to higher transmit power requirements
Solution Approach 1:
The patent combines communication signals and radar sensing signals into a composite signal structure where both functions share the same transmit power resources. By merging the signal designs, the system achieves sensing precision requirements without proportionally increasing total energy consumption, as the communication and radar functions are embedded within the same signal framework rather than operating separately with duplicate power requirements.
Solution Approach 2:
The unified signal design enables the system to achieve multiple functions (communication and radar sensing) with a single power allocation strategy. The radar sensing precision is maintained through careful design of the composite signal structure, while energy consumption is optimized by avoiding redundant power expenditure that would occur in separate communication and radar systems.
3Ease of operation
If fixed resource allocation is used for radar signals, then ease of operation is improved, but adaptability deteriorates when user environment changes
Solution Approach 1:
The patent implements dynamic resource allocation for the composite signal by allowing the radar signal parameters (such as time resource allocation, frequency offset, and power distribution) to be adjusted based on user environment conditions. The base station determines the appropriate resource allocation for radar signals within the communication signal structure, and these allocations can be dynamically modified in response to changing environmental requirements, thereby achieving both operational simplicity and environmental adaptability.
Solution Approach 2:
The system achieves adaptability by changing key parameters of the composite signal including time resource allocation, frequency offset, and power distribution based on user environment conditions. The base station determines appropriate parameter values for radar signal components within the communication signal, allowing the system to adapt to different scenarios (such as varying data rates, channel conditions, or sensing requirements) while maintaining a unified signal structure that preserves ease of operation.
Data Source
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AI summary
The objective of the present disclosure is to perform a wireless power procedure by using a first device in a wireless communication system, and an operation method of the first device may comprise the steps of: the first device receiving a synchronization signal from at least one second device and at least one third device; the first device performing, on the basis of the synchronization signal, a synchronization procedure with the at least one second device and the at least one third device; the first device receiving control information from the at least one second device and the at least one third device; the first device confirming scheduling information from the control information; and while moving on the basis of the scheduling information, the first device receiving power from the at least one second device and transmitting the power to the at least one third device.