Bandwidth reduction method for redirection of video equipment in USB redirection protocol, local terminal system and remote desktop system

Abstract

The invention relates to the technical field of mobile communication, in particular to a bandwidth reduction method for redirection of video equipment in a USB redirection protocol, a local terminal system and a remote desktop system. According to the invention, the method includes intercepting a USB signaling; based on the signaling type, selecting whether to forge and package the signaling or not; sending signaling to a remote desktop system; and enabling the remote desktop system to receive the signaling, analyze and unpack the signaling, and inject the signaling into the USB subsystem. Theinvention is a low-bandwidth and practical USB video equipment redirection scheme based on a wide area network encryption link, and can be widely applied to the fields of virtual desktops, remote desktops and the like; the network bandwidth required by redirection of the USB video equipment is greatly reduced, and the redirection concurrency of the USB video equipment supported by a local area network is improved; a wide area network is supported, and the requirement on network bandwidth is reduced, so that the redirection of the USB video equipment in the wide area network becomes possible.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a bandwidth reduction method for video device redirection in a USB redirection protocol, a local terminal system and a remote desktop system. Background technique [0002] USB (Universal Serial Bus) redirection is a technology that allows the USB external device inserted by the user in the local terminal system to be accessed in the remote desktop. It seems to the user that the USB external device is inserted in the remote desktop system. Same. The traditional USB redirection solution is to intercept the USB signaling in the terminal system, and then transmit the USB signaling to the remote desktop system through the network. [0003] This traditional solution has the following technical problems for USB video devices: [0004] 1. High requirements for network bandwidth: The USB redirection technology solution intercepts the USB signaling of the USB device in the l...

AI Technical Summary

Problems solved by technology

Even in a Gigabit LAN, it can only support 4 to 5 channels concurrently, and the number of concurrent redirection of USB video devices is also greatly limited, which limits the practicability of the solution

[0005] 2. There are high requirements for the configuration of local terminal devices: because the redirection of USB video devices has high requirements on network bandwidth, traditional redirection schemes are basically unavailable in a wide area network environment

Moreover, the amount of USB signaling data transmitted during USB video device redirection is huge, which requires the local terminal device running the terminal system to be equipped with at least a gigabit network card, which increases the manufacturing cost of the terminal device

[0006] 3. Poor support for WAN

[0007] The existing USB video device redirection technology solution requires extremely high network bandwidth, and generally can only be used in a LAN, and basically unavailable in a WAN

In addition, the transmission of USB signaling is not encrypted, which has low security and is not suitable for wide area networks.

Images