Bluetooth Scan Duty Control for Power-Latency Balance
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Solution Overview
Problem
Existing Bluetooth devices face challenges in balancing power consumption and performance during wireless scanning activities, often requiring compromises that affect latency and responsiveness.
Innovation Solution
A controller module is implemented to dynamically adjust Bluetooth activities based on the device's power state and user RF environment, allowing for optimized performance without compromising on power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Bluetooth devices use high-performance communication schemes to maintain low latency and high responsiveness, then performance is improved, but power consumption increases
Solution Approach 1:
The Bluetooth controller dynamically adjusts communication schemes and scan duty cycles based on real-time power state indications from the host processor. When the device is connected to a power source, the controller uses high-performance schemes with lower latency; when battery-powered, it transitions to power-saving modes, optimizing the balance between performance and energy consumption.
Solution Approach 2:
The system changes operational parameters including scan duty cycles and communication schemes based on power state. The controller receives power state indications and accordingly modifies Bluetooth scanning intervals, connection parameters, and data transfer rates to match the available power budget while maintaining acceptable performance levels.
2Use of energy by moving object
If Bluetooth devices reduce power consumption using power-saving modes, then power usage is minimized, but latency and responsiveness deteriorate
Solution Approach 1:
The Bluetooth controller dynamically switches between power-saving and high-performance modes based on power state indications. When the host processor indicates connection to a power source, the controller increases scan duty cycles and uses more aggressive connection parameters, thereby improving latency and responsiveness without unnecessarily consuming battery power.
Solution Approach 2:
The system implements a feedback mechanism where the host processor provides power state indications to the Bluetooth controller. The controller uses this feedback to continuously adapt its operation, increasing performance when power is available and reducing consumption when battery-powered, creating a closed-loop optimization system.
3Speed
If Bluetooth devices increase scan duty cycles to improve responsiveness and reduce latency, then performance is improved, but power consumption increases
Solution Approach 1:
The Bluetooth controller dynamically adjusts scan duty cycles based on power state indications from the host processor. When power is abundant, the controller increases scan frequency and reduces scan intervals, improving responsiveness. When battery-powered, it lowers scan duty cycles to conserve energy, maintaining an optimal balance between responsiveness and power consumption.
Data Source
AI summary
In some aspects, a Bluetooth (BT) device may include a BT controller configured to receive a power state indication from a host processor of the BT device, the power state indication to indicate a power state corresponding to a power source being utilized by the BT device; and to control one or more BT activities of the BT device according to a BT communication scheme, the BT controller to configure the BT communication scheme based on the power state indication.