UWB Synchronization Pattern Selection for Vehicle Access
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Solution Overview
Problem
Current RF ranging systems for secure vehicle access, such as keyless entry systems, face interference issues due to shared synchronization patterns among multiple devices, leading to reduced system performance and increased current consumption, especially in environments with many initiators, like car parks.
Innovation Solution
An Ultra-Wideband (UWB) wireless communication system that includes scanning circuits to detect and order available synchronization patterns by susceptibility to interference, allowing selection of optimal patterns for communication between an initiator and a responder to maximize multi-user channel capacity and ensure secure access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same synchronization pattern is used by multiple devices, then device complexity is reduced, but interference increases and system performance deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically selecting synchronization patterns based on RF environment characteristics. The system monitors RF interference levels and adjusts the synchronization pattern parameters (which pattern to use on which channel) accordingly, transforming a static allocation problem into a dynamic adaptation solution that resolves interference while maintaining manageable complexity
Solution Approach 2:
The patent implements dynamics by making the synchronization pattern allocation adaptive rather than fixed. The system continuously scans RF channels, detects interference conditions, and dynamically reassigns synchronization patterns to optimal channels, enabling the system to respond to changing environmental conditions and avoid persistent interference
2Device complexity
If multiple initiators use the same sync patterns in a crowded environment, then device complexity is reduced, but additional filtering steps are required increasing current consumption
Solution Approach 1:
The patent uses parameter changes to optimize the synchronization pattern selection based on detected RF conditions. By changing which synchronization pattern is active based on environmental factors, the system reduces the need for extensive filtering operations, thereby lowering current consumption while maintaining simple device architecture
Solution Approach 2:
The patent applies preliminary action by performing RF channel scanning and synchronization pattern selection before actual communication begins. This advance preparation identifies optimal patterns and channels, preventing the need for complex real-time filtering during operation and reducing overall energy consumption
3Device complexity
If synchronization patterns are not optimized for the RF environment, then system simplicity is maintained, but multi-user channel capacity is reduced
Solution Approach 1:
The patent implements feedback by continuously monitoring RF channel conditions and using this information to adjust synchronization pattern allocations. The system scans channels, detects interference levels, and feeds this information back into the pattern selection process, enabling adaptive optimization of multi-user channel capacity while keeping the base system relatively simple
Solution Approach 2:
The patent applies another dimension by introducing temporal and spatial dimensions to pattern allocation. Instead of a single static pattern, the system allocates patterns across multiple channels and time periods, adding dimensions of channel selection and temporal adaptation that increase channel capacity without proportionally increasing system complexity
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
The system enhances the reliability and security of vehicle access by reducing interference and optimizing synchronization patterns, leading to improved ranging performance and reduced power consumption.
Implementation Method 1
a scanning circuit (51) configured for scanning a plurality of channels of a radio frequency (RF) space supported by the responder (5) for detecting a plurality of available SYNC patterns
Data Source
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AI summary
An Ultra-Wideband (UWB) wireless communication device (4, 5), the communication device (4, 5) includes: a scanning circuit configured for scanning at least a channel supported by the communication device (4, 5) for detecting a plurality of patterns of a UWB frame format, an ordering circuit configured for ordering the plurality of patterns in a patterns list according to a predefined quality parameter, a selecting circuit configured for selecting at least one of the patterns in the list to start a Ultra-Wideband (UWB) wireless communication.