Wireless Power Coexistence Using Traffic-Aware Time Slotting
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Solution Overview
Problem
Wireless power transmission and data communication systems face interference when operating in the same frequency band, leading to reduced performance and service denial.
Innovation Solution
Implementing a method that detects data traffic patterns and adjusts wireless power transmission to avoid interference by categorizing and prioritizing data communication traffic, suspending power transmission during high-priority data exchanges, and modulating power levels to minimize interference while maintaining Quality of Service (QoS) for both power and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power transmission and data communication operate in the same frequency band, then spectrum utilization is improved, but interference between the two systems increases
Solution Approach 1:
The patent implements periodic time-division multiplexing where the shared frequency band is divided into alternating time slots for power transmission and data communication. The power transmission device periodically suspends power signals during data communication time slots and resumes them during dedicated power time slots, creating a rhythmic pattern that allows both systems to coexist without interference while fully utilizing the spectrum resource.
2Reliability
If wireless power transmission is suspended during data communication, then data communication quality is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic time slot allocation where the duration and frequency of power transmission slots are adjusted based on real-time system conditions. The power transmission device monitors data communication requirements and dynamically modifies the suspension pattern of power signals, extending or shortening power slots as needed to balance data quality requirements with power transmission efficiency goals.
Solution Approach 2:
The patent changes operational parameters by adjusting the power transmission characteristics during different time slots. During power transmission slots, the device operates at full power with high transmission parameters, while during data communication slots, it suspends or reduces power transmission parameters. This parameter modulation allows the system to optimize for either power delivery or data quality depending on the current time slot function.
3Reliability
If power transmission characteristics are adjusted to minimize interference, then coexistence is improved, but power transmission performance deteriorates
Solution Approach 1:
The patent segments the power transmission function into multiple discrete time slots distributed throughout the periodic cycle. Rather than continuously reducing power transmission characteristics, the system delivers full-power transmission during dedicated power slots, achieving acceptable average power performance while ensuring zero interference during data slots. This segmentation allows the system to maintain high peak power performance while ensuring coexistence.
Data Source
AI summary
A method of wireless power transmission is performed at a wireless-power-transmitting device having one or more antennas configured to transmit wireless-power signals, one or more processors, and a wireless data transceiver. The method comprises detecting that a wireless-power-receiving device is located in proximity to the wireless-power-transmitting device; establishing a data-traffic profile associated with the wireless-power-receiving device, the data-traffic profile including identifications of data signals to be exchanged over a predetermined frequency band between the wireless-power-receiving device and the wireless-power-transmitting device using the wireless data transceiver, determining windows of time during which to transmit wireless-power signals over the predetermined frequency band to the wireless-power-receiving device based on the data-traffic profile; and at the determined windows of time, transmitting, by the one or more antennas, wireless-power signals over the predetermined frequency band to the wireless-power-receiving device.