公开(公告)号：US09710342B1

公开(公告)日：2017-07-18

申请号：US14139038

申请日：2013-12-23

Applicant: Google Inc.

Inventor： Marvin Weinstein ,  Nathan Folkner ,  Roy Michael Bannon

IPC: G06F11/20 ,  G05B15/02 ,  H04L12/40

CPC classification number: G06F11/2005 ,  G05B15/02 ,  G05B19/0421 ,  H04L12/40176

Abstract: A system and method are provided for controlling mastership among multiple devices in a fault tolerant manner. The devices may be configured to transmit and receive redundant heartbeat signals to indicate the mastership state of the device. The signals may operate in a plurality of configurations including active-master, ready and not-ready. By detecting the signal configuration sent from the other devices, each device is capable of managing its own transitions into and out of mastership in order to ensure that there is one and only one device functioning as master.

公开(公告)号：US09391698B1

公开(公告)日：2016-07-12

申请号：US14061503

申请日：2013-10-23

Applicant: Google Inc.

Inventor： Ryohei Urata ,  Nathan Folkner ,  Zuowei Shen

IPC: H04B10/08 ,  H04B10/00 ,  H04B10/077 ,  H04B10/035 ,  H04B10/073

CPC classification number: H04B10/0779 ,  H04B10/035 ,  H04B10/073 ,  H04B10/0799 ,  H04B10/40 ,  H04B2210/08

Abstract: Systems and methods for achieving eye safety of an optical transceiver are provided. An optical module can be configured to output a first optical signal. A first photodetector can be configured to output a signal indicative of a presence or absence of a second optical signal. A controller can be coupled to the optical module and the first photodetector and can be configured to control the output of the optical module. In response to a determination that an output of the first photodetector indicates the second optical signal is absent, the controller can control the optical module to output the first signal at a decreased average optical power. In response to a determination that an output of the first photodetector indicates the second optical signal is present, the controller can control the optical module to output the first signal at an increased average optical power.

Abstract translation: 提供了用于实现光收发器的眼睛安全的系统和方法。 光学模块可以被配置为输出第一光信号。 第一光电检测器可以被配置为输出指示第二光信号的存在或不存在的信号。 控制器可以耦合到光学模块和第一光电检测器，并且可以被配置为控制光学模块的输出。 响应于确定第一光电检测器的输出指示第二光信号不存在，控制器可以控制光模块以平均光功率降低输出第一信号。 响应于第一光电检测器的输出表示第二光信号的确定，控制器可以控制光模块以增加的平均光功率输出第一信号。