Wireless Bitrate Control for Power-Efficient Real-Time Streaming
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Solution Overview
Problem
Wireless devices using Extended Personal Area Network (XPAN) interfaces for high-rate data transmission face significant power consumption issues, affecting battery life due to active durations and inefficient resource usage, especially in congested channels or network transitions.
Innovation Solution
Wireless devices determine a target wake duration and compare it to an average wake duration, adjusting bit rates based on differences to optimize power usage, identify inefficient bursts, and modify scheduling patterns to conserve power while maintaining quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a wireless device transmits data at a high rate using XPAN interface, then data transmission speed is improved, but power consumption increases and battery life deteriorates
Solution Approach 1:
The patent implements dynamic bitrate adjustment by continuously monitoring wake duration metrics and adapting the bitrate accordingly. The system transitions from static high-rate transmission to dynamic rate adaptation, adjusting the transmission rate based on actual channel conditions and power consumption patterns to optimize the trade-off between speed and energy usage
Solution Approach 2:
The patent changes the transmission parameter (bitrate) based on measured wake duration metrics. By calculating moving averages of wake durations and comparing them to target values, the system dynamically adjusts bitrate parameters to achieve optimal power efficiency while maintaining acceptable data transmission performance
2Reliability
If the wireless device remains active for longer durations to ensure data transmission, then data transmission reliability is improved, but battery life deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the device monitors its own wake duration metrics, calculates moving averages, and uses this information to adjust transmission parameters. This closed-loop control ensures reliable data transmission by adapting to actual channel conditions while minimizing unnecessary active durations that would drain the battery
Solution Approach 2:
The patent performs preliminary calculations of moving averages of wake durations before making bitrate adjustment decisions. By analyzing historical wake duration data in advance, the system can proactively adjust bitrates to prevent both excessive battery consumption and transmission failures, ensuring reliable operation
3Manufacturing precision
If the wireless device uses XPAN interface for direct peer-to-peer streaming, then data transmission quality is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamic bitrate adjustment specifically to XPAN interface transmissions, allowing the system to maintain high transmission quality when channel conditions permit while reducing power consumption during periods of poor conditions or when target wake duration thresholds are exceeded
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques generally provide for modifying a bit rate of a real-time stream at a station (STA). The STA may determine an average wake duration within an interval for communications with an access point (AP), and may compare the average to a target active duration for efficient power usage. In some other cases, the STA may learn a scheduling pattern of the AP, and may reduce the bitrate to eliminate the need for a portion of the wake duration having relatively lower data transmissions. Modifying the bit rate may support adjusting the active duration of the STA to be closer to the target active duration while maintaining a similar quality of the real-time stream (such as, a lossless stream).