USB Type-C MUX Configuration for Legacy Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Establishing connections between a USB Type-C source or sink and a legacy device across an extension medium is challenging due to the control of the Type-C MUX by the downstream facing port and the inability to determine the signals provided by the host device, which prevents reliable communication.
Innovation Solution
A system comprising an upstream facing port device (UFP) and a downstream facing port device (DFP) that communicate via an extension medium, where the DFP configures the Type-C MUX to determine the capabilities of the USB and DisplayPort sink device and reconfigures it to handle the signals from the host device, enabling communication of USB and video information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a USB Type-C source or sink is connected to a legacy device across an extension medium, then communication between modern and legacy devices is enabled, but the control of the Type-C MUX by the downstream facing port prevents reliable determination of signals provided by the host device
Solution Approach 1:
The patent introduces an intermediary control mechanism where the downstream facing port device (DFP) acts as a mediator between the upstream facing port device (UFP) and the USB Type-C sink. The DFP receives capability information from the sink, determines the appropriate MUX configuration, and controls the Type-C MUX accordingly. This intermediary approach resolves the contradiction by enabling legacy device compatibility through the extension medium while maintaining reliable signal communication through intelligent MUX control based on detected capabilities.
Solution Approach 2:
The patent implements preliminary action by having the downstream facing port device detect and determine the capabilities of the USB Type-C sink device before establishing the connection through the extension medium. The DFP receives capability information from the sink, pre-configures the Type-C MUX settings, and then enables communication. This preliminary configuration ensures that the MUX is properly set up before data transmission begins, resolving the reliability issue while maintaining adaptability to different device types.
2Adaptability or versatility
If the Type-C MUX is controlled by the downstream facing port to determine sink capabilities, then device compatibility is improved, but the complexity of configuring and reconfiguring the MUX increases
Solution Approach 1:
The patent applies self-service by enabling the USB Type-C sink device to automatically provide its capability information to the downstream facing port device. The sink device performs self-identification and communicates its capabilities through the extension medium, eliminating the need for complex manual configuration or sophisticated detection algorithms in the DFP. The DFP simply receives the capability information and configures the MUX accordingly, reducing overall system complexity while maintaining high adaptability.
Solution Approach 2:
The patent implements feedback mechanisms where the downstream facing port device receives capability information from the USB Type-C sink and uses this feedback to automatically configure the Type-C MUX. The system continuously monitors the connection status and capability information, adjusting the MUX configuration in response to the detected device type. This feedback loop simplifies the configuration process by making it automatic and adaptive, rather than requiring manual intervention or complex predetermined settings.
Data Source
AI summary
Techniques for supporting USB and video communication over an extension medium are provided. In some embodiments, an upstream facing port device (UFP device) is coupled to legacy connectors of a host device, and a downstream facing port device (DFP device) is coupled to a USB Type-C receptacle of the sink device that may provide both USB and DisplayPort information. The UFP device and DFP device communicate to properly configure the USB Type-C connection for use in the extension environment. In some embodiments, a source device is coupled to the UFP device via a USB Type-C connection, and legacy video and USB devices are coupled to the DFP device. The UFP device and DFP device again communicate to cause the source device to properly configure the USB Type-C connection for use in the extension environment.