USB Device OS Version Detection via Enumeration Analysis
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Solution Overview
Problem
Existing USB devices cannot effectively identify the version type of a Windows operating system on a host, which hinders their ability to communicate and function optimally with the host.
Innovation Solution
A method for a USB device to identify the version type of a Windows operating system by analyzing received instructions and using a mapping table to determine the correct device type, allowing it to establish communication and expose specific USB features corresponding to the host operating system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the USB device uses standard USB enumeration protocol, then the device can be recognized by the host, but the device cannot identify the specific version type of Windows operating system
Solution Approach 1:
The patent applies preliminary action by pre-defining a mapping relationship between different Windows operating system versions and corresponding device types before the USB device needs to identify the host OS. The USB device stores this mapping table in advance, allowing it to quickly match the enumerated device type with the correct OS version without complex real-time analysis during the enumeration process.
Solution Approach 2:
The patent introduces an intermediary mechanism by using a mapping table as a mediator between the USB enumeration protocol and the operating system version identification. This mapping table translates the generic USB device type information into specific Windows version identification, serving as an intermediary layer that bridges the gap between standard USB protocol and OS-specific functionality.
2Adaptability or versatility
If the USB device returns a fixed device type during enumeration, then the enumeration process is simple, but the device cannot adapt to different operating system versions
Solution Approach 1:
The patent applies dynamics by making the device type determination dynamic rather than fixed. The USB device determines its device type based on the actual host operating system version detected during enumeration, allowing the same physical device to present different device types to different OS versions. This dynamic adaptation enables the device to work optimally with Windows XP, Windows Vista, and Windows 7 without requiring multiple hardware versions.
Solution Approach 2:
The patent changes the parameter of device type identification from a static fixed value to a dynamic value that varies based on the host operating system version. By changing the device type parameter according to the detected OS version and using the mapping table to translate device types, the system achieves adaptability while keeping the underlying hardware unchanged.
3Measurement precision
If the USB device performs detailed OS version detection, then the identification accuracy is high, but the enumeration time increases
Solution Approach 1:
The patent applies preliminary action by pre-creating a mapping table that contains the relationship between device types and Windows operating system versions before the enumeration process starts. This pre-prepared mapping allows the USB device to quickly match the enumerated device type with the corresponding OS version without performing time-consuming analysis during enumeration, thus achieving high accuracy with minimal time overhead.
Solution Approach 2:
The patent uses a copying approach by creating a simplified representation (mapping table) of the complex relationship between device types and operating system versions. Instead of performing complex real-time detection algorithms, the system copies the essential mapping information into a lookup table, allowing fast retrieval during enumeration while maintaining high identification accuracy.
Data Source
AI summary
The invention provides a method for identifying version type of a Windows operating system on a host by USB device, relating to operating system field and including steps: A, USB device is powered on and initialized; B, the USB device performs USB enumeration, determines whether a first predetermined instruction is received in process of USB enumeration, if yes, determines the operating system is a first operating system and goes to Step D, if no, goes to C; C, the USB device determines the device type returned in process of USB enumeration, if it is a CCID device, determines whether the received instruction includes a second predetermined instruction, if yes, determines the operating system is a second operating system, if no, determines the operating system is a third operating system; when the device is an SCSI device, the USB device determines whether the second received SCSI instruction is a third predetermined instruction or fourth predetermined instruction, if it is the third predetermined instruction, determines that the operating system is a second operating system, if it is the fourth predetermined instruction, determines that the operating system is a third operating system; D, the USB device establishes communication with the host, waits for instruction sent by the host and returns related information to the host according to the determined type of the host operating system.