V2X Radar Hopping Pattern Interference Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications systems, particularly in V2X systems, there is a challenge with interference between multiple radar-equipped vehicle UEs, where overlapping radar signals cause noise and ghost targets, making it difficult for victim UEs to identify and mitigate interference.
Innovation Solution
Implementing hopping patterns for radar signaling, where each UE selects a unique pattern based on parameters like frame start time and phase ramp, allowing victim UEs to detect interfering UEs and coordinate interference mitigation through sidelink messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple UEs transmit radar signals simultaneously in the same frequency resources, then the radar detection capability of each UE is maintained, but interference between UEs increases causing noise and ghost targets
Solution Approach 1:
The patent applies periodic action by implementing hopping patterns that periodically change the time and frequency resources used for radar signal transmission. Each UE follows a predefined hopping pattern that determines when and where to transmit radar signals, creating periodic transmission cycles that avoid continuous interference while maintaining detection capability.
Solution Approach 2:
The patent applies dynamics by making the radar transmission resources dynamic rather than static. The hopping patterns allow UEs to dynamically switch between different time-frequency resources based on their assigned pattern, enabling the system to adapt resource allocation and reduce interference while maintaining radar functionality.
2Object-affected harmful factors
If hopping patterns are implemented for radar signaling, then interference between UEs is reduced, but the complexity of detecting and coordinating patterns increases
Solution Approach 1:
The patent applies feedback by implementing a coordination mechanism where UEs exchange information about their detected hopping patterns through sidelink messages. When a UE detects a hopping pattern from another UE, it sends feedback information to coordinate resource usage, allowing the system to resolve interference through iterative communication and adjustment.
Solution Approach 2:
The patent applies intermediary by using sidelink messages as a mediation channel between UEs. These messages serve as an intermediary mechanism that facilitates the exchange of hopping pattern information and coordination data, enabling UEs to detect and adapt to each other's transmission patterns without direct interference.
3Ease of operation
If UEs use fixed time-frequency resources for radar transmission, then the simplicity of transmission is maintained, but the ability to adapt to interference from other UEs is reduced
Solution Approach 1:
The patent applies dynamics by transitioning from fixed to dynamic resource allocation through hopping patterns. Each UE is assigned a specific hopping pattern that dynamically determines its transmission resources over time, allowing the system to maintain operational simplicity through predefined patterns while gaining adaptability to interference conditions.
Solution Approach 2:
The patent applies parameter changes by varying the time and frequency parameters of radar signal transmission according to hopping patterns. Instead of using fixed parameters, the system changes transmission parameters systematically according to assigned patterns, enabling adaptability while maintaining structured operation.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Each user equipment (UE) in a vehicle-to-everything (V2X) system may select a hopping pattern for transmitting a set of radar signals. A victim UE may experience interference from an interfering UE. The victim UE may receive a set of radar signals in a set of transmission frames from the interfering UE. The victim UE may detect a hopping pattern from the set of radar signals based on receiving the set of radar signals in the set of transmission frames. The victim UE may transmit a sidelink message to an interfering UE for interference coordination based on detecting the hopping pattern.