At&t Intellectual Property I, LP

Joseph Thomas Stango

Guodong Zhang

Marc Owen Nutto Gottwerth

Margaret T Chiosi

Margarat T Chlasl

Example methods disclosed herein to reroute Internet Protocol traffic include, after detecting a defect in a first communication path for routing user traffic associated with a network user, causing a router to buffer the user traffic for a first time period having a first duration before causing the router to reroute the user traffic over a second communication path, the first duration based on a first threshold. Such example methods also include, after detecting correction of the defect, causing the router to continue to route the user traffic over the second communication path for a second time period having a second duration before causing the router to revert to routing the user traffic over the first communication path, the second duration based on a second threshold, the first and second thresholds being adjustable based on a number of cycles of network defects and network corrections counted within a tracking period.

Systems and methods to reroute internet protocol traffic based on network user preferences

Example systems, apparatus, and methods to reroute Internet Protocol traffic based on network user preferences are disclosed. A disclosed example method includes detecting a network defect in a first communication path, receiving IP traffic associated with a network user at a router, wherein the IP traffic is to be routed by the router over the first communication path, and buffering the IP traffic associated with the network user during a first time period having a first duration defined by the network user.

Systems and methods to rerouting internet protocol traffic based on network user preferences

An optically amplified wavelength division multiplexing network has the functionality to add/drop channels at the optical add/drop multiplexing (OADM) nodes. The OADM node includes a receiver amplifier, an OADM module, and a transmitter amplifier. Once the OADM node detects a loss of signal (LOS) due to a fiber cut or network element failure upstream, the receiver amplifier is kept in operation as a noise source. The output of the receiver amplifier is immediately raised by increasing pump power to compensate for the LOS. The noise power received at the transmitter amplifier from the receiver amplifier is substantially equal to the signal power expected before LOS. The transient effect of downstream optical amplifiers is therefore completely suppressed and the inter-channel stimulated Raman scattering (SRS) induced spectrum tilt does not change. After the noise power is raised, the receiver amplifier may be shut down at a speed much slower than the speed of downstream amplifier control circuitry.

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Manalapan, NJ, United States of America

Joseph Thomas Stango