Coordinated Slot-Based Radar Sensing for Interference Reduction
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in coordinating radar signals among multiple devices, leading to interference and reduced accuracy in target detection due to the lack of coordinated slot-based radar sensing techniques.
Innovation Solution
Implementing a method for forming and managing radar device groups, where devices can join or leave groups based on broadcast information, and coordinate transmission schedules to minimize interference and enhance target detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radar devices transmit signals simultaneously without coordination, then each device can independently perform radar sensing, but interference occurs and target detection accuracy deteriorates
Solution Approach 1:
The patent divides the radar sensing process into discrete time slots within a transmission schedule. Each wireless device is assigned specific time slots for radar signal transmission, segmenting the continuous transmission space into manageable intervals. This segmentation prevents simultaneous transmissions from multiple devices, thereby eliminating interference while maintaining independent radar sensing capability for each device in its allocated slots.
2Productivity
If radar devices operate independently without group coordination, then device complexity is reduced, but resource allocation efficiency deteriorates in crowded environments
Solution Approach 1:
The patent merges multiple radar devices into coordinated groups where devices share transmission schedules and time slot allocations. By combining resources and coordinating transmissions at the group level, the system achieves efficient resource allocation in crowded environments. The group coordination mechanism manages time slot distribution and transmission scheduling collectively, improving overall productivity while distributing the coordination complexity across group members rather than requiring individual device complexity.
3Measurement precision
If a centralized transmission schedule is implemented for radar groups, then interference is reduced and target detection accuracy improves, but device complexity and coordination overhead increase
Solution Approach 1:
The patent implements periodic transmission schedules where radar signal transmissions occur at regular, predetermined time intervals assigned to each device. This periodic structure simplifies the coordination mechanism by establishing predictable patterns rather than requiring complex real-time negotiations. Each device follows its assigned periodic schedule, reducing interference through regular time slot separation while maintaining manageable device complexity through standardized periodic operations rather than adaptive coordination.
Data Source
AI summary
This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for coordinated slot-based radar sensing. A first radar device, which may be a radar group leader, may broadcast information indicative of a wireless device group that includes the first wireless device. The first wireless device may receive, from a second wireless device that receives the broadcast information, a request to join the wireless device group that includes the first wireless device. The first wireless device may transmit, to the second wireless device based on the request, a grant or rejection to join the wireless device group that includes the first wireless device. The first wireless device may further transmit a transmission schedule to at least one wireless device of the wireless device group, where the at least one wireless device may include the second wireless device if the first wireless device transmits the grant.