UE Device COT Detection for Interference Avoidance
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Solution Overview
Problem
Wireless communication systems sharing common RF spectrum, such as Wi-Fi and 5G systems, face interference challenges that degrade the quality of service and power consumption due to coexistence, particularly when one system's interference is not detectable by the other.
Innovation Solution
Implementing methods in Wi-Fi and 5G devices to detect channel occupancy times (COT) signaled by interfering devices, allowing them to operate in sleep modes to minimize power consumption and avoid interference, with base stations stopping downlink transmissions upon detecting interference and users equipment (UE) devices waking up only to receive control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If wireless communication systems operate in shared unlicensed spectra, then communication bandwidth is increased, but interference between different systems (e.g., Wi-Fi and 5G) degrades service quality and increases power consumption
Solution Approach 1:
The patent applies preliminary action by implementing Channel Occupancy Time (COT) detection before actual communication occurs. Devices detect and identify COT signals from interfering systems in advance, allowing them to proactively adjust their transmission schedules and avoid interference before it degrades service quality or increases power consumption.
Solution Approach 2:
The patent implements feedback mechanisms where devices continuously monitor the RF spectrum for COT signals from other systems. This feedback loop enables dynamic adjustment of transmission parameters based on detected interference conditions, allowing systems to adapt their behavior in real-time to maintain service quality while sharing unlicensed spectra.
2Reliability
If devices continuously monitor for interference in shared spectra, then service quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing discontinuous reception (DRX) cycles and periodic COT monitoring instead of continuous monitoring. Devices wake up at scheduled intervals to check for COT signals from interfering systems, maintaining service quality through periodic quality-of-service (QoS) checks while significantly reducing power consumption during idle periods when no monitoring is performed.
3Object-affected harmful factors
If base stations stop downlink transmissions upon detecting interference, then interference impact is minimized, but communication productivity decreases
Solution Approach 1:
The patent implements dynamic interference management where base stations do not permanently stop downlink transmissions but rather dynamically adjust transmission schedules based on detected COT signals. When interference is detected, the system dynamically shifts transmissions to non-overlapping time slots or adjusts modulation and coding schemes, minimizing interference impact while maintaining overall communication productivity through flexible resource allocation.
Data Source
AI summary
A method for detecting a channel occupancy time declared by an interfering device in a wireless communication system includes (a) receiving a first radio frequency (RF) transmission from a base station at a user equipment (UE) device, (b) detecting failure to receive a second RF transmission from the base station at the UE device, and (c) in response to detecting the failure to receive the second RF transmission from the base station, causing the UE device to operate in a sleep mode. Another method for detecting a channel occupancy time declared by an interfering device in a wireless communication system includes (a) receiving a first RF transmission from a base station at a UE device, (b) detecting, at the UE device, an interfering RF transmission, and (c) in response to detecting the interfering RF transmission, causing the UE device to operate in a sleep mode.