Ljubisa Tancevski

US Patent:

6728212, Apr 27, 2004

Filed:

Jun 23, 2000

Appl. No.:

09/602836

Inventors:

Ljubisa Tancevski - Dallas TX

Assignee:

Alcatel - Paris

International Classification:

H04L 1228

US Classification:

370235, 3703954, 370468, 359140, 398 49, 398177

Abstract:

The invention is an apparatus and method for scheduling the flow of packets. Its purpose is to reduce excess loads, while at the same time, improving efficiency of the system. The scheduler is divided into two or more schedulers operating in parallel. Furthermore, each scheduler is assigned a subset of the available wavelengths. The assignment of wavelengths is done in an asymmetric manner such that one scheduler is assigned many more wavelengths. In addition, the void filling scheduler is used in conjunction with bandwidth grabbing to improve scheduling performance. In a preferred embodiment, the buffer occupancy of a first scheduler is monitored. If it is below a threshold (and a second schedulers buffer is full), then packets intended for the second scheduler are transferred to the first scheduler.

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:

7391744, Jun 24, 2008

Filed:

Oct 18, 2004

Appl. No.:

10/967873

Inventors:

Jessy Rouyer - Fort Worth TX, US
Kamakshi Sridhar - Plano TX, US
Ljubisa Tancevski - Dallas TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

G01R 31/08

US Classification:

370258, 370404

Abstract:

A bridged network system (). The bridged network system comprises a plurality of bridge nodes (N-N). Each bridge node in the plurality of bridge nodes is coupled to communicate with at least one other bridge node in the plurality of nodes. Further, bridge nodes in the plurality of bridge nodes are connected to one another to form a communications-possible line of bridge nodes (N, N, N, N, N, N, N, N). Each bridge node comprises circuitry for associating a bridge priority, selected from a plurality of bridge priorities, with the respective bridge node. The plurality of bridge priorities may be arranged in an ordered sequence, but the bridge priorities associated with successive bridge nodes along the communications-possible line of bridge nodes comprises at least two discontinuities (N/N; N/N; N/N) in the ordered sequence.

US Patent:

7698617, Apr 13, 2010

Filed:

Mar 3, 2006

Appl. No.:

11/367891

Inventors:

Hakki C. Cankaya - Dallas TX, US
Ljubisa Tancevski - Dallas TX, US
Kamakshi Sridhar - Plano TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H03M 13/00

US Classification:

714751, 714 4, 714 18, 370237

Abstract:

An intelligent switch and method are described herein which help to effectively retransmit a lost packet that is associated with a television broadcast stream to one or more set-top boxes.

US Patent:

7756018, Jul 13, 2010

Filed:

Nov 3, 2005

Appl. No.:

11/265866

Inventors:

Ljubisa Tancevski - Dallas TX, US
An Ge - Plano TX, US
Jessy V. Rouyer - Ft. Worth TX, US
Nicolas Le Sauze - Bures-sur-Yvette, FR

Assignee:

Alcatel Lucent - Paris

International Classification:

H04J 1/16

US Classification:

370228, 370248, 370242

Abstract:

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.

US Patent:

7899066, Mar 1, 2011

Filed:

Sep 25, 2001

Appl. No.:

09/962685

Inventors:

Ljubisa Tancevski - Dallas TX, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/28
H04L 12/56
H04J 4/00

US Classification:

370404, 370410, 370438

Abstract:

A metropolitan access network () uses a variation of a MAC protocol, where each station () on a ring () is associated with one or more time slot (). Each slot carries information regarding the associated station, basic connection fields (), communications fields (), and quality of service fields (). Each station maintains its own local database regarding the status of the network () by reading the information in each time slot ().

US Patent:

7921326, Apr 5, 2011

Filed:

May 20, 2008

Appl. No.:

12/124095

Inventors:

Maher Ali - Plano TX, US
Chao Kan - Plano TX, US
Ljubisa Tancevski - Dallas TX, US
Tim Barrett - North Ryde, AU
Laurent Philippart - Lisbon, PT
Filipe Mendonca - Lisbon, PT
Felicio Vaz - Linda-a-Velha, PT

Assignee:

Alcatel Lucent - Paris

International Classification:

G06F 11/00

US Classification:

714 4, 714 48

Abstract:

A spatial monitoring-correlation mechanism and a method are described herein for determining an origin of a problem within an Internet Protocol Television (IPTV) network by using topology information about the IPTV network and at least one error notification (e. g. , packet loss notification-retransmission request) that is generated by at least one component (e. g. , set-top box) within the IPTV network.

US Patent:

8031630, Oct 4, 2011

Filed:

Dec 16, 2003

Appl. No.:

10/737219

Inventors:

David Elie-Dit-Cosaque - Richardson TX, US
Girish Chiruvolu - Plano TX, US
Jessy Rouyer - Addison TX, US
Ljubisa Tancevski - Dallas TX, US
Jean-Francois Cartier - Treillieres, FR
Laurence Rose - Oak Park CA, US
L. Michele Goodwin - Westlake Village CA, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/28

US Classification:

370254

Abstract:

Customer virtual local area networks (C-VLANs) connecting multiple LAN segments are set up through a provider network (). Provider edge bridges (PEs) are coupled to customer edge bridges (CEs) to provide a transparent link between LAN segments. To determine whether a backdoor link is used in the C-VLAN topology, PEs monitor MAC address from a predetermined time after a TCN is received to determine if there are contradictory addresses or new addresses relative to the existing MAC address tables (or forwarding databases) that are indicative of a backdoor link. If so, an unlearning message is sent to bridges in the provider domain. In another embodiment, CEs set a snoop bit to indicate which TCNs must be snooped.