Radio Wake-Up System with Dynamic Sniffing Modes
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Solution Overview
Problem
In low-power communication systems, existing wake-up radios face challenges in balancing power consumption and latency, as continuously powered radios consume high power and periodically powered ones may miss wake-up signals due to inefficient sniffing patterns.
Innovation Solution
A method and system that dynamically adjust the timing of sniffs and wake-up message transmission based on channel conditions, employing multiple operational modes to minimize power consumption and latency, by using a controller to change operational modes in response to varying channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If continuously powered wake-up radios are used, then fast response to communication requests is achieved, but power consumption increases significantly
Solution Approach 1:
The wake-up radio system dynamically switches between continuously powered mode and periodically powered mode based on operational requirements. The system can transition from continuous operation (fast response) to periodic sniffing (low power) and back again, making the power consumption adaptable rather than static. This resolves the contradiction by allowing the system to have fast response capability when needed while consuming minimal power during normal operation.
Solution Approach 2:
The invention implements periodic sniffing where the wake-up radio periodically activates to check for wake-up signals instead of remaining continuously active. By using periodic action with configurable intervals, the system achieves low power consumption during idle periods while still being able to detect and respond to communication requests when they occur, thus resolving the trade-off between continuous monitoring and power savings.
2Use of energy by moving object
If periodically powered wake-up radios with sniffing technique are used, then power consumption is reduced, but wake-up signals may be missed due to inefficient sniffing patterns
Solution Approach 1:
The system employs feedback mechanisms where the wake-up radio monitors the results of previous sniffing attempts and adjusts future sniffing patterns accordingly. If wake-up signals are detected or expected, the system can increase sniffing frequency or adjust timing to ensure reliable detection. This feedback loop maintains high reliability for wake-up signal detection while keeping power consumption low by avoiding unnecessary frequent sniffing when no signals are expected.
Solution Approach 2:
The sniffing pattern is made dynamic and configurable rather than fixed. The system can adjust sniffing intervals, durations, and timing based on operational conditions, traffic patterns, and detected signal characteristics. This dynamic adaptation allows the system to optimize the balance between power consumption and detection reliability for each specific scenario.
3Loss of time
If fixed sniffing intervals are used to meet minimum latency requirements, then latency is controlled, but power consumption increases due to frequent sniffing
Solution Approach 1:
The sniffing interval is made dynamic rather than fixed, allowing the system to adjust the timing between sniffing operations based on current operational needs. When low latency is required, the system can temporarily increase sniffing frequency; when latency requirements are relaxed, it can reduce sniffing frequency to save power. This dynamic adjustment resolves the contradiction by making the time loss and power consumption variable rather than fixed.
Solution Approach 2:
The system changes operational parameters (sniffing interval, sniff duration, power state transitions) based on varying conditions such as traffic patterns, latency requirements, and power availability. By dynamically changing these parameters, the system can optimize the trade-off between latency performance and power consumption for different operational scenarios rather than being constrained to a single fixed configuration.
Data Source
AI summary
In a method of establishing communication between a primary node and secondary nodes over communications channels, the secondary nodes are placed in a sleep state in the absence of active communications and are responsive to a wake-up message transmitted over the one or more communications channels from the primary node to enter a wake-up state. A wake-up message is sent from an instigator at the primary node to a receptor at a said secondary node. The communications channels with the receptor at said secondary node are periodically sniffed for a valid wake-up message. In response to reception of a valid wake-up message the receptor places the secondary node in the wake-up state. The instigator and receptor employ a selected operational mode being defined by the timing of the wake-up message and sniff pattern at the receptor. The selected operational mode is changed to suit different channel conditions.