An N Ge

US Patent:

6819870, Nov 16, 2004

Filed:

May 11, 2000

Appl. No.:

09/569488

Inventors:

An Ge - Plano TX
Lakshman S. Tamil - Plano TX

Assignee:

Alcatel - Paris

International Classification:

H04J 1400

US Classification:

398 51, 398 49

Abstract:

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)=1, ,. . . , n, 1, ,. . . , 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.

US Patent:

7286759, Oct 23, 2007

Filed:

Apr 2, 2003

Appl. No.:

10/405530

Inventors:

Kamakshi Sridhar - Plano TX, US
An Ge - Plano TX, US
Wonhong Cho - Frisco TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04J 14/00
H04J 14/02

US Classification:

398 43, 398 79

Abstract:

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.

US Patent:

7372814, May 13, 2008

Filed:

Nov 18, 2003

Appl. No.:

10/715748

Inventors:

Girish Chiruvolu - Plano TX, US
An Ge - Plano TX, US

Assignee:

Alcatel-Lucent - Paris

International Classification:

H04L 12/26
H04L 12/56

US Classification:

370235, 370412

Abstract:

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.

US Patent:

7386233, Jun 10, 2008

Filed:

Sep 6, 2002

Appl. No.:

10/488772

Inventors:

Emmanuel Dotaro - Verrieres le Buisson, FR
Nicolas Le Sauze - Bures-sur-Yvette, FR
An Ge - Plano TX, US
Ljubisa Tancevski - Dallas TX, US

Assignee:

Alcatel - Paris

International Classification:

H04B 10/24

US Classification:

398 59, 398 4, 398 31

Abstract:

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.

US Patent:

7408936, Aug 5, 2008

Filed:

Aug 20, 2004

Appl. No.:

10/922602

Inventors:

An Ge - Plano TX, US
Maher Ali - Richardson TX, US
Girish Chiruvolu - Plano TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/28
H04L 12/66

US Classification:

370392, 37039521, 370396, 370398, 370401, 370411, 709218, 709222, 709226, 709228, 709231

Abstract:

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.

US Patent:

7471647, Dec 30, 2008

Filed:

Apr 29, 2005

Appl. No.:

11/118136

Inventors:

An Ge - Plano TX, US
Girish Chiruvolu - Plano TX, US
Maher Ali - Richardson TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370256, 370252, 709238

Abstract:

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.

US Patent:

7471699, Dec 30, 2008

Filed:

Sep 7, 2005

Appl. No.:

11/219830

Inventors:

Laurent Ciavaglia - Fontainebleau, FR
Nicolas Le Sauze - Bures-sur-Yvette, FR
An Ge - Plano TX, US

Assignee:

Alcatel - Paris

International Classification:

H04J 14/08

US Classification:

370471, 370528, 398 73

Abstract:

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.

US Patent:

7508757, Mar 24, 2009

Filed:

Sep 16, 2005

Appl. No.:

11/229114

Inventors:

An Ge - Plano TX, US
Girish Chiruvolu - Plano TX, US
Maher Ali - Richardson TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/26
H04L 12/28

US Classification:

370229, 370252, 370401

Abstract:

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.