Alcatel Lucent

Alcatel

An Ge

Girish Chiruvolu

Nicolas Le Sauze

Maher Ali

Kamakshi Sridhar

Ljubisa Tancevski

Italo Busi

Dominique Chiaroni

Lakshman S Tamil

Atiya Suhail

Amaury Jourdan

Emmanuel Dotaro

Maarten Petrus Joseph Vissers

Jessy Victor Rouyer

Alberto Bellato

Laurent Ciavaglia

Vincenzo Sestito

Jih-Tsang Leu

Wonhong Cho

Jessy V Rouyer

A system and method for dynamically policing network traffic based on egress queue status and a network node incorporating the system or the method. In one embodiment, the system includes: (1) a policing engine configured to receive egress queue status information and (2) a pushback calculator associated with the policing engine and configured to produce a reduction calculation based on the egress queue status information, the policing engine further configured to produce a throttle signal to reduce a traffic policing rate of an ingress queue.

System and method for dynamically policing network traffic based on egress queue status

A method for creating an Operation Administration and Maintenance frame in an Ethernet/Transport Multi-Protocol Label Switch hybrid network. The method includes mapping values in an Ethernet Operation Administration and Maintenance data field in a protocol data unit (PDU) in a first Ethernet Operation Administration and Maintenance frame (Ethernet OAM frame) into a Transport Multi-Protocol Label Switch Operation Administration and Maintenance data field in PDU in a first Transport Multi-Protocol Label Switch Operation Administration and Maintenance frame (TMPLS OAM frame) and mapping values in first control parameter fields in the first Ethernet OAM frame into second control parameter fields in the first TMPLS OAM frame. The PDU in the first TMPLS OAM frame includes added extra fields as necessary, and the second control parameter fields further comprise preselected default information and routing information mapped from values stored in a memory.

Ethernet/TMPLS hybrid network operation administration and maintenance frame creation method

System and method for providing fast protection in a passive optical network ('PON') including two central hubs and a plurality of network nodes, wherein the network nodes are connected to a first of the central hubs by a first optical path and to a second of the central hubs by a second optical path. The method comprises setting the first and second central hubs to master mode and slave mode, respectively, such that only the first central hub transmits traffic to and from the network nodes; detecting a failure in the first optical path; exchanging status information between the first and second central hubs; and if no failure has occurred in the second optical path, setting the first and second central hubs to slave mode and master mode, respectively, such that only the second central hub transmits traffic to and from the network nodes.

System and method for implementing fast layer 2 protection in passive optical networks

A bridged network system (). The system comprises at least one network server (NS) for receiving and responding to authentication session requests. The system also comprises a plurality of bridge nodes (BRN). Each bridge node in the plurality of bridge nodes is connected to communicate with at least one other neighboring bridge node in the plurality of nodes, and each bridge node comprises at least one port (BP), circuitry for communicating with at least one of either another bridge node in the plurality of nodes or the at least one network server, and circuitry for limiting () a number of authentication sessions active at a same time through the at least one port. The system also comprises a central resource (e.g., BRN). The central resource comprises circuitry for directing () the circuitry for limiting, for at least two bridge nodes in the plurality of bridge nodes, in response to a number of authentication sessions active at a same time through two or more bridge nodes in the plurality of bridge nodes.

Network with distributed authentication control

A packet switch is described. In one embodiment, the packet switch comprises a plurality of ingress ports for receiving packets at the packet switch and for appending a tag to each packet that designates one of the plurality of ingress ports that received the packet; a plurality of egress ports for removing the tag from the packets and transmitting the packets from the packet switch; and switch fabric for switching the packets from one of the plurality of ingress ports to one of the plurality of egress ports.

Method and apparatus for performing scalable selective backpressure in packet-switched networks using internal tags

A method of operating a bridge node (B) in a network system. The bridge node comprises a plurality of ports (BP). The method comprises a step of receiving a frame (), from a device in the network system and other than the bridge node, at a port in the plurality of ports. The frame comprises a source network address. The method is also responsive to at least one condition () associated with the port in that the method stores the source address in a forwarding table associated with the bridge if the at least one condition is satisfied. The at least one condition comprises whether the frame was received within a time window Tof when a threshold number of previous frames were received at the port and their respective source network addresses were stored in the table.

Network with MAC table overflow protection

A bridged network system ('). The system comprises a plurality of bridge nodes (BRN). Each bridge node in the plurality of bridge nodes is connected to communicate with at least one other neighboring bridge node in the plurality of nodes. Each bridge node in the plurality of bridge nodes comprises circuitry (BP) for communicating with at least one of either another bridge node in the plurality of nodes or a network server. Each bridge node in the plurality of bridge nodes further comprises circuitry for storing (neighbor-tracking table), as received from the at least one of another bridge node in the plurality of nodes and the network server, at least one spanning tree parameter of a neighboring bridge node.

Bridged network spanning tree abnormality detection

In a network including an optical link transporting packet streams of successive optical packets separated by voids, the station includes a transmission device () coupled to the link at an insertion point in order to inject optical packets into the link. At a detection point on the link, upstream of the insertion point, a detection device () observes the packet streams transported to this detection point. As a function of this observation each packet awaiting transmission and transmitted by the transmission device () causes the formation at the insertion point of a downstream packet stream containing the transmitted packet interposed between first and second packets delimiting a void of the upstream stream. The detection device () forms a transmission control signal (ACK) such that in the event of transmission as a function of this control signal, any transmitted packet is attached to at least one of the first and second packets.

Station for optical network suitable for inserting packets into a stream of packets in transit

A method of routing packets in network system where the network system comprises a plurality of edge nodes and a plurality of core nodes. Selected core nodes are coupled to communicate with selected edge nodes. The network system also comprises a plurality of external nodes, with selected external nodes coupled to communicate with selected edge nodes, and where different external nodes are associated with a plurality of different entities sharing resources on the network system. The method comprises proposing a set of entities from the plurality of different entities. The proposed set comprises entities associated with external nodes that share respective connections to a number of edge nodes in the edge nodes such that the shared number is less than a total number of all edge nodes to which each different entity in the set is connected, with other aspects then taken with respect to the proposed set.

Scalable VLAN grouping in a provider Metro Ethernet

The invention relates to an optical ring network comprising stations () which are connected to at least one optical fiber by means of optical couplers, the two ends of the optical fiber being connected to a point of presence or an optical network access node. The point of presence comprises (k) at least an optical emitter (-) which emits a falling optical signal having at lest one first wavelength () in the direction of one end of the optical fibers () and (ii) at least one optical receiver (-) which receives a rising optical signal having at least one second wavelength which is different form the first wavelength. The aforementioned optical network access node comprises means such as a hub () which can be used for the communication between the optical receiver (-) and the optical emitter (-). The wavelengths of the rising signals and the wavelengths of the falling signals are shared by several stations.

Ring network made using a dual optical data bus

A network system (). The system comprises a first network node (N), and the node comprises an input () for receiving packets. During operation, the first network node operates as a downstream node when receiving packets at the input from an upstream node (N). The node also comprises a buffer (), coupled to the input and for storing received packets, and circuitry () for detecting when a number of packets stored in the buffer exceeds a buffer storage threshold. The node also comprises circuitry (), responsive to a detection by the circuitry for detecting that the number of packets stored in the buffer exceeds the buffer storage threshold, for issuing a message to the upstream node. The message selectively commands the upstream node to reduce a rate of transmission of packets from the upstream node to the downstream node to a non-zero rate.

Network system with color-aware upstream switch transmission rate control in response to downstream switch traffic buffering

System and method for dynamically assigning wavelengths wavelength division multiplex ('WDM') ring networks is described. In one embodiment, the invention comprises a method for dynamic wavelength assignment on a ring in a WDM network comprising, for each new requested traffic flow from a source node to a destination node on the ring, for each segment on a path around the ring between the source and destination nodes, classifying the new requested traffic flow into one of a set of spatial relationship types for each existing wavelength; determining a corresponding number of optical-to-electrical and electrical-to-optical ('OEO') interfaces needed for each spatial relationship type selected for each segment; determining the total number of OEO interfaces needed for the entire path between the source and destination nodes along the ring; and selecting the existing wavelengths that minimize the OEO interfaces.

System and method for dynamic wavelength assignment in wavelength division multiplex ring networks

A method for wavelength division multiplexing (WDM) fiber delay line (FDL) optical buffer routing and scheduling of conflicted variable length data packets through an optical router. The method includes ordering of each conflicted variable length data packet and selecting each of the data packets in turn for routing based on the ordering sequence selected. The sequentially assigned conflicted data packet is assigned a wavelength in the FDL optical buffer from (n) available wavelengths, wherein (n)&equals;&lgr;1, &lgr; , . . . , &lgr;n, &lgr;1, &lgr; , . . . , &lgr;n, . . . . Each data packet is converted to the sequentially assigned wavelength (n) and routed to an optical buffer according to the wavelength assignment. If the wavelength of the FDL optical buffer is fully occupied the data packet is dropped.

All-optical networking optical fiber line delay buffering apparatus and method

A method for synchronizing optical signals conducted via different optical waveguides to an optical network node, wherein the variations in propagation time of the optical signals are compensated by adjustable optical delay circuits of a synchronizing device. To set a new delay for one of the optical waveguides, one of the adjustable delay circuits, already switched into the passive state, is set at the desired delay. This delay circuit is then switched into the active state by means of a high-speed optical switch, and the previously active delay circuit is switched into a passive state.

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Plano, TX, United States of America

An Ge