Bluetooth RPA Updating via Controller Offload for Lower AP Power
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Solution Overview
Problem
The frequent updating of Bluetooth Host's Resolvable Private Address (RPA) by the AP chip increases power consumption and affects its working performance due to periodic wake-ups.
Innovation Solution
Decentralize the RPA updating function to a sensor hub or Bluetooth Controller, which periodically updates the RPA based on an Identity Resolving Key (IRK) sent by the Bluetooth Host, reducing power consumption and improving AP chip performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Bluetooth Host periodically updates the RPA, then the Bluetooth address privacy is protected, but the power consumption of the AP chip increases and working performance deteriorates
Solution Approach 1:
The patent extracts the RPA updating function from the Bluetooth Host (AP chip) and relocates it to a dedicated low-power module. This separation allows the AP chip to remain in sleep mode while the dedicated module handles periodic RPA updates, thus protecting Bluetooth address privacy without increasing AP chip power consumption.
Solution Approach 2:
The patent introduces a dedicated low-power module as an intermediary between the Bluetooth Host and the RPA updating mechanism. This intermediary module receives the IRK from the Bluetooth Host and independently performs RPA updates, acting as a mediator that eliminates the need for the AP chip to wake up periodically.
2Reliability
If the Bluetooth Host periodically updates the RPA, then the Bluetooth address privacy is protected, but the working performance of the AP chip is affected
Solution Approach 1:
The patent extracts the RPA updating function from the Bluetooth Host (AP chip) and relocates it to a dedicated low-power module. This separation allows the AP chip to remain in sleep mode while the dedicated module handles periodic RPA updates, thus protecting Bluetooth address privacy without increasing AP chip power consumption.
Solution Approach 2:
The dedicated low-power module autonomously performs RPA updates without requiring the AP chip to be active. The module independently manages the updating process using the IRK it received, making the system self-sufficient for privacy protection tasks and eliminating performance degradation of the AP chip.
3Use of energy by moving object
If the RPA updating function is decentralized to sensor hub or Bluetooth Controller, then power consumption is reduced and AP chip performance is improved, but the system complexity increases
Solution Approach 1:
The patent leverages existing low-power modules (sensor hub or Bluetooth Controller) that are already part of the system architecture. By utilizing these existing components for RPA updates, the patent avoids adding entirely new hardware, thus reducing power consumption without significantly increasing system complexity.
Data Source
AI summary
This application provides a Bluetooth random address generation method and a related electronic device. The method includes: the Bluetooth Host generates an identity resolving key (IRK); the Bluetooth Host sends the IRK to the Bluetooth module when the electronic device meets a first condition, where the first condition is a condition for triggering the electronic device to reduce power consumption; the Bluetooth module generates a resolvable private address (RPA) based on the IRK, and periodically updates the RPA based on the IRK; the Bluetooth Host sends an RPA request to the Bluetooth module when the Bluetooth Host needs to execute a Bluetooth service; the Bluetooth module sends a latest updated RPA to the Bluetooth Host; and the Bluetooth Host executes the Bluetooth service based on the latest updated RPA. Therefore reducing the power consumption of the AP chip, and extending the standby time of electronic device.