Patent ID: 9337950
Filing Date: 2016-05-10
CPC Classification: H04J,H04L

Claim Text:
1. A network comprising: a transport layer that includes: a routing layer (L3) comprising a plurality of routers, each router communicatively coupled directly and/or through an interface to at least one node in A and at least one node in B; wherein the network is operable to provide first priority network traffic (F traffic) with a first class service having a first Quality of Service (QoS) and second priority network traffic (S traffic) with a second class service having a second QoS lower than the first QoS; and wherein, in normal operation, F traffic does not exceed half of the total instantaneous network traffic and the network is configured to direct all of the F traffic to A and an amount of S traffic to B that is equal to the amount of F traffic and to split any remaining S traffic between A and B; and wherein the routers of the routing layer and/or the interfaces between the routers of the routing layer and the nodes of the transport layer subnetworks A and B coupled thereto, are configured to direct traffic to and/or from a subnetwork of the transport layer based on the traffic's service class and are operable to be aware of the percentage of the network capacity used by F traffic, recognize the class of service of traffic in a packet stream processed by the corresponding router, split the traffic stream between the corresponding router and the WDM layer, by means of TDM or WDM, so that a predetermined percentage of F and S traffic goes to A and a different predetermined percentage of F and S traffic goes to B; receive an alarm in case of an equipment outage in the WDM-layer, and be aware of the state of the WDM-layer in view of the equipment outage; and responsive to the alarm: responsive to a confirmation that A has been restored, return the traffic pattern to the pre-alarm state.