Wake-Up Receiver Soft Hand-Off for Sensor Interfaces
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Solution Overview
Problem
Wireless communications in urban environments face challenges such as signal fading, multi-path transmission, and environmental degradations, leading to impaired radio communications, particularly for remote sensor interfaces (RSIs) that require efficient power management and reliable connectivity.
Innovation Solution
A method and system that utilize a remote sensor interface with multiple low power radio systems and wake-up receivers to selectively activate the most suitable two-way wireless communication device based on signal strength and class designations, enabling 'soft hand-off' between radio systems to maintain reliable communication while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple low power radio systems are used to improve communication reliability, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The system divides the radio communication capability into multiple separate low power radio systems, each with its own wake-up receiver. This segmentation allows the system to have multiple communication paths available while keeping each individual radio in a low power state until needed, thus improving reliability without proportionally increasing power consumption.
Solution Approach 2:
The wake-up receivers perform preliminary action by listening for wake-up signals before the main radio systems are activated. This allows the system to prepare for potential communication needs in advance while maintaining low power consumption, as the wake-up receivers are simpler and more power-efficient components that can operate continuously at very low power levels.
Solution Approach 3:
The system dynamically activates only the necessary radio systems based on real-time communication needs and signal conditions. The controller monitors which radio systems receive wake-up signals and activates only those, creating a dynamic configuration that adapts to changing environmental conditions and communication requirements to optimize the balance between reliability and power consumption.
2Use of energy by moving object
If wake-up receivers are used to select communication devices, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The wake-up receiver acts as an intermediary component between the external environment and the main radio systems. It receives wake-up signals from external sources and mediates by selectively triggering the appropriate radio systems based on signal strength and class designations, thereby reducing power consumption while managing system complexity through a dedicated selection mechanism.
Solution Approach 2:
The system implements feedback mechanisms where the controller monitors which radio systems receive wake-up signals and uses this information to determine activation decisions. This feedback loop allows the system to learn from previous operations and make more intelligent decisions about resource allocation, balancing power consumption with communication reliability.
3Reliability
If signal strength is used for selecting communication channel, then communication reliability is improved, but measurement precision requirements increase
Solution Approach 1:
The system uses partial action by considering only the signal strength measurements from radio systems that receive wake-up signals, rather than requiring precise measurements from all possible radio systems. This approach reduces the measurement precision requirements while still achieving reliable communication selection, as the wake-up signal reception itself serves as a preliminary filter that indicates sufficient signal quality.
Data Source
AI summary
Multiple standards based radio (“SBR”) devices, each having a high-gain directional antenna, are utilized in a remote sensor interface (“RSI”) unit to optimize detection and reception by the RSI of radio signals from gateway controllers, hopping radios, and other wireless devices.