Apparatus and methods for dynamic role switching among USB hosts and devices
US10585832B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2017 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Oct 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/3854
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for a USB hub connected to USB host and one or more USB devices to support the USB host and the USB devices to dynamically switch roles such that a product which initially operates as a USB device operates a USB host while a USB host supports additional operation as a USB device. Products such as smartphones, initially operating as USB devices, may dynamically switch roles to become USB hosts. Similarly USB hosts, such as PCs and in-vehicle infotainment systems, initially operating as USB hosts may dynamically support additional operation as USB devices. The USB host operates a USB device stack over a USB host stack such that the USB device stack communicates with a role-switched USB host via the root port that remains in a state acting as USB host. In addition, the USB host maintains a connection to an upstream port of the USB hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.