OTA OS Migration Airlock for Memory-Constrained Devices

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Solution Overview

Problem

Existing technologies face challenges in efficiently and reliably migrating thousands of computing devices from one operating system to another via Over-the-Air (OTA) updates, particularly due to memory constraints, device compatibility issues, and the risk of bricking during the process.

Innovation Solution

A method involving a sequence of builds, including an airlock update, recovery mode operations, and partition management, ensures seamless migration of computing devices from one operating system to another using OTA updates, while preserving user data and handling various memory types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If OTA update is used to migrate operating system across thousands of devices, then device update efficiency is improved, but device complexity and risk of failure increase

Engineering Contradiction:

Improvedevice update efficiencyVSAvoidmigration process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The migration process is divided into distinct sequential builds: pre-migration build (airlock), migration build, and post-migration build. Each build handles specific tasks and transitions, breaking down the complex OS migration into manageable stages that can be controlled and reverted if needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The airlock build is deployed before the actual OS migration to prepare the device environment. This preliminary action includes installing migration agents, setting up partition structures, and validating device compatibility, ensuring the device is ready for migration before the critical OS update occurs.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If complete operating system change is performed via OTA, then OS compatibility across product line is improved, but risk of bricking device increases

Engineering Contradiction:

ImproveOS compatibilityVSAvoiddevice usability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The airlock build acts as a cushioning layer before the actual OS migration. It includes validation mechanisms, rollback capabilities, and error handling that prevent complete device failure if the migration encounters issues. The device maintains functionality throughout the migration process.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The migration build serves as an intermediary state between the old and new operating systems. It contains migration agents and tools that facilitate the transition while maintaining device operability. This intermediary layer allows for controlled migration and easy reversal if problems occur.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If memory space is allocated for update package during OTA migration, then migration capability is improved, but available memory for user data decreases

Engineering Contradiction:

Improvemigration capabilityVSAvoidavailable memory

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The solution moves the update package storage to a different dimension - using external cloud storage and downloading only essential migration components to the device. The airlock build downloads minimal necessary files, and the full OS image is streamed or downloaded on-demand during the migration process, rather than requiring all updates to reside in device memory simultaneously.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

Partition structures are pre-configured in the airlock build to create dedicated spaces for migration data. This preliminary partitioning allows the system to efficiently manage memory allocation during migration without impacting user data storage capacity, as partitions are created with precise size requirements.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If batch migration is implemented across multiple devices, then migration control is improved, but backend system complexity increases

Engineering Contradiction:

Improvemigration controlVSAvoidbackend system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The backend migration service implements feedback loops that track the migration status of each device, validate successful transitions, and adjust subsequent migration batches based on observed outcomes. Devices report their migration state, and the system uses this feedback to control the pace and scope of ongoing migrations, ensuring stability across the device fleet.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12572366B1In-field device migration between operating systems

Publication Date: 2026.03.10 GOOGLE LLC

AI summary

The technology involves migration of computing devices from one operating system to a different operating system, e.g., via an over-the-air (OTA) process. The migration at the device can be done autonomously without human input, while managing resource issues such as limited memory size or different memory types. A sequence of builds may be employed depending on the type of device that undergoes migration. A backend migration service can provide an airlock feature to migrate devices in batches, for instance should fractional migration be employed for many devices in a product line. The airlock approach provides a handshake between devices and an update service irrespective of which batch a given computing device is in. This enables the OTA process to support batch OS migration for thousands of computing devices or more, while ensuring that changes to each computing device are accounted for.