Techniques for deconflicting usb traffic in an extension environment

A system for communicating USB information via an extension medium, the system comprising:

• an upstream facing port device (UFP device) communicatively coupled to a host device via a USB-compliant connection;
• a downstream facing port device (DFP device) communicatively coupled to a USB device via a USB-compliant connection and communicatively coupled to the UFP device via a non-USB extension medium;
• wherein the DFP device is configured to:
• receive, from the UFP device via the extension medium, a request packet, wherein the request packet is directed to a first endpoint;
• receive, from the UFP device via the extension medium, a second packet while receiving a response associated with the request packet from the first endpoint, wherein the second packet is directed to a second endpoint;
• store the second packet in a packet queue at least until receipt of the response associated with the request packet has completed;
• and
• sort packets stored in the packet queue according to a priority order.

A method for communicating USB information via an extension medium, the method comprising:

• receiving, by a DFP device from a UFP device via an extension medium, a request packet, wherein the request packet is directed to a first endpoint;
• receiving, by the DFP device from the UFP device via the extension medium, a second packet while receiving a response associated with the request packet from the first endpoint, wherein the second packet is directed to a second endpoint;
• storing, by the DFP device, the second packet in a packet queue at least until receipt of the response associated with the request packet has completed;
• and
• sorting, by the DFP device, packets stored in the packet queue according to a priority order.

A downstream facing port device (DFP device), comprising:

• a USB downstream-facing port configured to be communicatively coupled to one or more USB devices;
• and
• an extension interface configured to be communicatively coupled to an upstream facing port device (UFP device) via a non-USB extension medium;
• wherein the DFP device is configured to:
• receive, from a UFP device via an extension medium, a request packet, wherein the request packet is directed to a first endpoint;
• receive, from the UFP device via the extension medium, a second packet while receiving a response associated with the request packet from the first endpoint, wherein the second packet is directed to a second endpoint;
• store the second packet in a packet queue at least until receipt of the response associated with the request packet has completed;
• and
• sort packets stored in the packet queue according to a priority order.