Norival R Figueira

6566639, May 20, 2003

Aug 23, 2001

09/935819

Norival R. Figueira - San Jose CA

Nortel Networks Limited - St. Laurent

G02B 704

2502015, 25022711

A system, method and apparatus for storing data using an optical medium. The medium is initialized and data is inserted into the medium, read from the medium and reinserted into the medium. Queues, random access storage devices and other similar structures are formed according to this technique.

6609226, Aug 19, 2003

Apr 10, 2000

09/545660

Norival R. Figueira - San Jose CA

Nortel Networks Limited - St. Laurent

H03M 1309

714807

A networking device and method for transparently modifying a cyclic redundancy check (CRC) of a message so that higher layers (e. g. , data link layer and above) can detect error duplication caused by scrambling and descrambling. No increase in the size of the messaging is needed so that the invention may be used for current and future technologies. In one embodiment, the networking device comprises logic employed within a physical layer of the device. This logic, referred to as a scrambler, modifies an original cyclic redundancy check (CRC) value associated with a message. This enables detection of a duplication of bit errors at a targeted destination of the message.

6944163, Sep 13, 2005

Dec 19, 2000

09/739385

Paul A. Bottorff - Palo Alto CA, US
Norival R. Figueira - San Jose CA, US
David W. Martin - Stittsville, CA
Timothy J. Armstrong - Stittsville, CA
Bijan Raahemi - Nepean, CA

Nortel Networks Limited - St. Laurent

H04L012/56
H04J003/22

3703955, 370466, 370477, 370521, 370545, 375248

An Ethernet mapping enables high speed Ethernet data streams having a data rate of 10 Gb/s to be transported across a synchronous packet switched network fabric having a standard SONET OC-192 line rate of 9. 953280 Gbaud. The 10 Gb/s Ethernet data stream is compressed by removing interframe gaps between successive MAC frames to produce a compressed data stream, which is then mapped to a synchronous container. The synchronous container is then launched across the synchronous packet switched network fabric at a standard SONET OC-192 line rate of 9. 953280 Gbaud. The synchronous container is preferably provided as a stripped STS-192c frame having only A1 and A2 octets of the Transport Overhead (TOH). The compressed data stream is mapped directly to the synchronous container, starting at the first octet following the A1 and A2 octets, without first being inserted into a conventional STS-192c SPE, so that most of the space normally used for TOH and Path overhead (POH) within a conventional STS-192c frame is freed-up for carrying the compressed data stream. At a receiving interface, the compressed data stream is extracted from received synchronous containers and decompressed, by insertion of interframe gaps between successive MAC frames, to generate a recovered 10 Gb/s Ethernet data stream.

7394808, Jul 1, 2008

May 24, 2004

10/852317

Norival Figueira - Campbell CA, US
Huiwen Li - San Jose CA, US
Guyves Achtari - Ottawa, CA

Nortel Networks Limited

H04L 12/28
H04L 12/56

370389

Device-wide performance guarantees may be implemented in a network element using a pull forwarding scheme by using separate processes on the network element communicating via handshake signals to enable coordination between the aspects of the network element. One class of processes execute at the ingress queues, a second class of process execut at junction points, and a final class of processes execute at the egress ports. The combination of these separate processes leads to the correct scheduling of frames in a device-wide manner as if there were a centralized scheduler with complete information about all queued frames. As a result, the performance guarantees of the intended scheduling algorithm are preserved and are provided in a device-wide manner. The scheduling algorithms that are supported include round-robin, deficit round robin, negative deficit round robin, weighted round robin, and strict priority.

7555579, Jun 30, 2009

May 21, 2004

10/850886

Norival R. Figueira - Campbell CA, US

Nortel Networks Limited - St. Laurent, Quebec

G06F 5/00

710 52, 711202

FIFOs may be implemented in shared memory using linked lists and interleaved linked lists such that any individual FIFO can dynamically use any free memory location. The system may be implemented in hardware efficiently and does not pre-allocate memory to any FIFO, so that the whole shared memory may be used by any one of the FIFOs. The maximum physical size of a FIFO is then limited only by the size of the physical memory and not by the number of FIFOs sharing the same physical memory or by any mechanism for pre-allocating physical memory to the FIFOs. The linked lists contain data words, each data word containing a data field and a reference to a subsequent free memory location. A subsequent data word may be enqueued to the FIFO at the last referenced free memory location. A dequeue operation returns free memory locations to the free memory pool. Multiple linked lists may be interleaved to accelerate reading of data words from the FIFO.

7697527, Apr 13, 2010

Nov 20, 2003

10/718129

Norival R. Figueira - Campbell CA, US
Paul A. Bottorff - Palo Alto CA, US
Huiwen Li - San Jose CA, US

Nortel Networks Limited - St. Laurent, Quebec

H04L 12/56

370392, 370389

Frame contained destination information may be used by a switch to identify an appropriate output port for a given frame without performing a table access operation. This reduces the processing requirements of the switch to enable the switch to handle frames more efficiently. The frame contained destination information may be contained in the frame's local destination MAC addresses (DA) such that a portion of the DA directly indicates, for each switch that handles the frame, an output port for that switch. Different portions of the DA may be used by different switches, depending on where they are in the network hierarchy. Large switches may also use sub-fields within their allocated portion in the DA to identify internal switching components. A location resolution server may be provided to store and distribute IP and MAC addresses and respond to local ARP requests on the local domain.

7876749, Jan 25, 2011

Nov 23, 2005

11/287583

Norival Figueira - Campbell CA, US
Paul Bottorff - Palo Alto CA, US

Nortel Networks Limited - Mississauga, Ontario

H04L 12/28

370389, 370535

A metro area network is provided that includes edge and core multiplexors each having a plurality of line ports and one or more uplink ports, a transport network carrying multiplexed traffic between the edge and core multiplexors. In a hard cross connect implementation utilizing source port tagging, a cross-connect device coupled to the core multiplexors provisions or maps communications path between the core multiplexors thereby providing preselected connectivity/mapping of two or more line ports of any of the edge multiplexors. In a soft cross connect implementation utilizing destination port tagging, a cross-connect device includes additional cross-connect multiplexors and functionality to control the destination port tagging performed in the edge, core and cross connect multiplexors thereby provisioning or mapping the desired communications path(s) between various endpoints.

8018880, Sep 13, 2011

Mar 25, 2008

12/079413

Norival R. Figueira - Campbell CA, US
Richard D. Gitlin - Little Silver NJ, US

Brixham Solutions Ltd. - Tortola

H04B 3/30

370285, 3703953, 3703955, 37039553, 709231, 709249

A Layer 2 Virtual Private Network (L2VPN) system is provided. A Provider Backbone Bridge (PBB) network is provided which comprises a plurality of sites to be connected via a L2VPN. The plurality of sites in the PBB network is connected using a plurality of provider backbone trunks that includes a Provider Backbone Transport (PBT) trunk or a Provider Backbone Bridge Traffic Engineering (PBB-TE) trunk, such that the L2VPN includes the plurality of sites.