Multi-Channel Tolling Protection for Out-of-Band Emission Control
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Solution Overview
Problem
Current communication standards face challenges in managing out of band emissions that cause interference in nearby frequency bands, particularly when multiple devices transmit simultaneously, leading to potential loss of safety service messages and reduced system efficiency.
Innovation Solution
Implementing dynamic selection of out of band emission protection mechanisms and transmission scheduling techniques to ensure that safety-related messages are received by receivers operating on a single channel, even during simultaneous transmissions by multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If protection mechanisms are implemented to mitigate out of band emissions, then interference in nearby frequency bands is reduced, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of protection mechanisms based on real-time detection of simultaneous transmissions. The system transitions from static, always-on protection to dynamic activation, selecting appropriate mechanisms (frequency hopping, power reduction, directional beamforming) based on current interference conditions, thereby reducing unnecessary complexity while maintaining protection effectiveness
Solution Approach 2:
The system changes operational parameters (frequency, power level, beam direction) based on detected transmission conditions. By dynamically adjusting these parameters rather than maintaining fixed protection mechanisms, the system reduces complexity while adapting to varying interference scenarios in the frequency bands
2Productivity
If multiple devices transmit simultaneously to improve system efficiency, then productivity increases, but out of band emissions causing interference increase
Solution Approach 1:
The patent implements a feedback mechanism where devices detect simultaneous transmissions and their resulting out of band emissions, then adjust their transmission parameters accordingly. This closed-loop control allows multiple devices to transmit simultaneously while actively managing and reducing harmful emissions through real-time adjustments based on detected conditions
Solution Approach 2:
The system takes preliminary action by detecting simultaneous transmissions and applying protection mechanisms before interference is fully established. By proactively adjusting transmission parameters upon detection of concurrent transmissions, the system prevents harmful out of band emissions from occurring in the first place, rather than reacting after interference damage is done
3Reliability
If safety service messages are transmitted on multiple channels to ensure reception, then reliability improves, but loss of time for message delivery increases
Solution Approach 1:
The patent segments safety service messages across multiple channels but implements intelligent scheduling that transmits critical portions on primary channels first, with less time-sensitive segments on secondary channels. This segmented approach with prioritized transmission ensures reliable delivery of essential safety information while minimizing overall message delivery time
Solution Approach 2:
The system uses periodic transmission of safety service messages across different channels in a scheduled sequence. By transmitting messages periodically on multiple channels rather than simultaneously, the system ensures that receivers on any single channel will eventually receive the safety information within an acceptable time frame, balancing reliability with time constraints
Data Source
AI summary
Techniques are disclosed for dynamically selecting out of band emission protection mechanisms to protect the usage of other frequency bands, as well as techniques for managing the scheduling and transmission of safety related messages having different communication latency requirements.