公开(公告)号：US20190215090A1

公开(公告)日：2019-07-11

申请号：US16219241

申请日：2018-12-13

Applicant: Google LLC

Inventor： Vinayak Dangui ,  Vijayanand Vusirikala ,  Matthew Newland

IPC: H04J14/02 ,  H04B10/564

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.

公开(公告)号：US10027436B2

公开(公告)日：2018-07-17

申请号：US14947116

申请日：2015-11-20

Applicant: Google LLC

Inventor： Bikash Koley ,  Vijayanand Vusirikala ,  Hong Liu

IPC: H04J14/02 ,  H04L12/24 ,  H04L5/00 ,  H04L25/02 ,  H04L27/00 ,  H04L12/851 ,  H04L12/859 ,  H04Q11/00

Abstract: Apparatus and methods are provided for application layer optimization in a modern data network. The optimization incorporates variable rate transmission across one or more optical data channels. Data throughput is maximized by enabling quality of service profiles on a per transmission channel basis. According to one aspect, a system is provided in which the application layer is aware of and controls the underlying transmission rate and quality of the transmission. This enables the system to fully utilize the transmission capacity of the channel. The application layer may map different applications to different transmission classes of service. The services can be classified based on data throughput rate, guaranteed error rates, latency and cost, among other criteria. This provides flexibility to the application layer to map some loss tolerant applications to a lower cost (per bit) transmission class.