公开(公告)号：US20140344490A1

公开(公告)日：2014-11-20

申请号：US14270124

申请日：2014-05-05

Applicant: QUALCOMM INCORPORATED

Inventor： YOSSEF TSFATY ,  XIAODONG WANG ,  ALIREZA RAISSINIA ,  VIJAYALAKSHMI RAJASUNDARAM RAVEENDRAN ,  XIAOLONG HUANG

IPC: G06F13/42

CPC classification number: G06F13/4286 ,  G06F13/4282 ,  G06F2213/0042 ,  H04J3/06

Abstract: A method of transmitting universal serial bus (USB) frames over a communications channel is disclosed. A USB device receives one or more USB frames from a host device via a network, wherein the one or more USB frames are encapsulated in one or more data packets based on a communications protocol associated with the network. The USB device further synchronizes a local clock signal with a clock signal of the host device using a clock synchronization mechanism of the communications protocol. The USB device then determines a number of USB frames transmitted by the host device and processes the one or more USB frames based, at least in part, on the synchronized local clock signal. For some embodiments, the USB device may receive a frame count value and a corresponding media time value from the host device.

Abstract translation: 公开了一种在通信信道上发送通用串行总线（USB）帧的方法。 USB设备经由网络从主机设备接收一个或多个USB帧，其中基于与该网络相关联的通信协议将一个或多个USB帧封装在一个或多个数据分组中。 USB设备使用通信协议的时钟同步机制进一步使本地时钟信号与主机设备的时钟信号同步。 USB设备然后确定主机设备发送的USB帧的数量，并且至少部分地基于同步的本地时钟信号来处理一个或多个USB帧。 对于一些实施例，USB设备可以从主机设备接收帧计数值和对应的媒体时间值。