ETC Wake-Up Signal Detection for Wireless Interference Avoidance
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Solution Overview
Problem
Wireless communication systems, such as electronic toll collection (ETC) systems, are susceptible to interference from other wireless communication systems sharing the same radio channel or frequency band, affecting normal operation.
Innovation Solution
A data processing method that identifies the characteristic signal of the ETC system, such as a wake-up signal, and suspends sending signals at adjacent or overlapping frequencies to avoid interference, using a signal identifying module and interference avoidance processing module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless communication system uses a radio channel or frequency band that is shared with another wireless communication system, then communication coverage and service availability are improved, but interference between systems increases and normal operation is affected
Solution Approach 1:
The system performs preliminary detection of wake-up signals from the ETC system before actual communication begins. By detecting the wake-up signal at the ETC system's frequency in advance, the system can proactively suspend its own signal transmission at adjacent or overlapping frequencies, preventing interference before it occurs rather than reacting after interference has happened.
Solution Approach 2:
The system continuously monitors for wake-up signals from the ETC system and uses this feedback information to dynamically adjust its transmission behavior. When a wake-up signal is detected, the system receives feedback that triggers suspension of signal sending at interfering frequencies, creating a closed-loop control mechanism that adapts to real-time system state.
2Reliability
If the system continuously monitors for ETC wake-up signals to enable timely interference avoidance, then interference avoidance effectiveness is improved, but energy consumption and processing complexity increase
Solution Approach 1:
Instead of continuously monitoring all frequency bands, the system focuses detection resources on specific local frequency regions where ETC wake-up signals are expected to appear. By concentrating monitoring efforts only at the ETC system's designated frequency rather than sweeping the entire spectrum, the system maintains reliable detection while significantly reducing energy consumption and processing overhead.
Data Source
AI summary
This application discloses a data processing method and apparatus. The method includes: sending a signal of a service at a first operating frequency, where the first operating frequency is adjacent to or overlaps with a first frequency of an electronic toll collection ETC system; detecting a first signal at a second frequency of the ETC system, where the first signal is a wake-up signal of the ETC system for an on-board unit OBU; and in response to a detection result of the first signal, suspending sending the signal of the service at the first operating frequency. In the method, a characteristic signal of a wireless communication system, for example, an ETC system, can be identified in a timely manner, to actively perform interference avoidance, thereby ensuring normal running of the wireless communication system.