Adaptive Sensing Rate for Wireless Detection
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in detecting licensed user transmissions in white spaces, leading to unnecessary energy consumption and complexity, especially for battery-operated devices, due to frequent sensing requirements and potential interference from shadow fading.
Innovation Solution
A method where user equipment (UE) adjusts its sensing rate based on the number of adjacent sensors detecting licensed user transmissions and current radio conditions, optimizing sensing duration and frequency to reduce power consumption and improve detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing is performed frequently to detect licensed user transmissions, then detection reliability is improved, but energy consumption increases
Solution Approach 1:
The sensing rate is made dynamic and adaptive rather than fixed. The system adjusts the sensing rate based on detected radio conditions, neighboring device density, and detection history, allowing the UE to sense more frequently when needed (e.g., when licensed user activity is detected) and less frequently when conditions indicate low risk, thus resolving the contradiction between detection reliability and energy consumption
Solution Approach 2:
The system changes the sensing rate parameter based on multiple factors including radio conditions, number of neighboring sensors, and time since last detection. By varying this key parameter dynamically, the system achieves reliable detection when necessary while minimizing energy consumption during low-risk periods
2Speed
If sensing rate is increased to improve detection speed, then response time is improved, but power consumption increases
Solution Approach 1:
The sensing rate is dynamically adjusted based on current operational context. When rapid detection is critical (e.g., when licensed user transmissions are detected), the system increases sensing rate to improve response time. When conditions are stable and risk is low, the system reduces sensing rate to minimize power consumption, thus resolving the contradiction between detection speed and power consumption
3Reliability
If all UEs perform sensing to ensure detection, then detection coverage is improved, but system complexity increases
Solution Approach 1:
The patent merges the sensing function into the existing UE architecture by leveraging the UE's existing receiver and processor capabilities. Instead of adding separate sensing hardware to every UE, the system combines sensing with existing communication functions, using the UE's receiver to detect licensed user transmissions while utilizing base station information about neighboring devices to reduce individual UE sensing requirements
Solution Approach 2:
The system uses feedback from base stations about the number of neighboring sensors and radio conditions to dynamically adjust UE sensing behavior. This feedback mechanism allows UEs to coordinate their sensing activities, reducing individual complexity while maintaining overall detection coverage through distributed coordination
Data Source
AI summary
Sensing wireless transmissions from a licensed user of a licensed spectral resource includes obtaining information indicating a number of adjacent sensors that are concurrently sensing wireless transmissions from the licensed user of the licensed spectral resource. Such information can be obtained from a main node controlling the sensor and its adjacent sensors, or by the sensor itself (e.g., by means of short-range communication equipment targeting any such adjacent sensors). A sensing rate is then determined as a function, at least in part, of the information indicating the number of adjacent sensors that are concurrently sensing wireless transmissions from the licensed user of the licensed spectral resource. Receiver equipment is then periodically operated at the determined sensing rate, wherein the receiver equipment is configured to detect wireless transmissions from the licensed user of the licensed spectral resource.