Cortina Systems Corporation

Mahi Networks, Inc.

Cortina Access, Inc.

Abhimanyu Das

Eugene W Lee

Charles Changging Chen

Dongsheng Zhang

Deyi Dong

Vishal Sharma

There are disclosed systems and methods for detecting and controlling congestion in an Optical Line Terminal (OLT). The OLT has a plurality of ports. Each port of the plurality of ports communicates with at least one Optical Network Unit (ONU), and each port of the plurality of ports has a respective enforced maximum upstream bandwidth. For example, the maximum upstream bandwidth may be enforced by a Dynamic Bandwidth Allocation (DBA) algorithm. The OLT further includes an uplink port through which data received from each of the plurality of ports are transmitted. In one embodiment, if there is congestion of the data at the uplink port, then the enforced maximum upstream bandwidth for at least one port of the plurality of ports is modified.

Congestion control in an optical line terminal

A method of operation of a network transport system includes: determining a congestion mode based on a total bandwidth request meeting or exceeding a bandwidth threshold, where the congestion mode indicates a level of network traffic and the total bandwidth request is a sum of all bandwidth requests for accessing the network; calculating a fixed information rate schedule grant based on a fixed information rate list to create a bandwidth grant for a fixed information rate request; calculating a low latency schedule grant based on a low latency list to create the bandwidth grant for a low latency request; calculating a main schedule grant for allocating an available bandwidth based on the congestion mode, where the main schedule grant is calculated using a weighted maximum-minimum fairness method when the congestion mode indicates congestion; and generating a grant packet for defining a transmission schedule of a first network unit.

Network transport system with hybrid dynamic bandwidth allocation mechanism and method of operation thereof

A method and integrated hardware system for dynamic bandwidth allocation in EPONs which&#x2014;in sharp contrast to the prior art&#x2014;provides superior upstream transmission characteristics including QoS considerations consistent with any Service Level Agreement that exists between a customer and a service provider. Advantageously, our inventive method and system for dynamic bandwidth allocation provides fair and efficient upstream bandwidth management in addition to enhanced traffic performance for customer traffic within the EPON. For a service provider, our invention permits the deployment of intelligent traffic management and QoS characteristics capable of supporting existing or novel voice, video, and data services over the EPON.

Intelligent bandwidth allocation for ethernet passive optical networks

Embodiments of the invention are generally directed to a system and method of implementing peer model architecture in integrated optical networks. In one embodiment, heterogeneous domains of nodes share a common control plane via routing and signaling adjacencies established through a network layer control channel. For example, in one embodiment, one or more Internet Protocol (IP) compliant routers, one or more Time Domain Multiplexing (TDM) switches, and one or more Wave Division Multiplexing (WDM) optical cross connects (OXC) run a common instance of an Interior Gateway Protocol (IGP).

Growing community of inventors

Los Angeles, CA, United States of America

Abhimanyu Das