Patents Assigned to Alcatel Canada Inc.
  • Patent number: 7284272
    Abstract: Methods of preventing flooding-type denial-of-service attacks in a computer-based network are described. Connection establishing messages known as SYN packets are matched with connection terminating messages (FIN packets) by using a hash algorithm. The hash algorithm or message digest uses source and destination IP addresses, port numbers, and a secret key as input parameters. The SYN packets and FIN packets are mapped to buckets using the hash algorithm and statistics are maintained for each bucket. A correspondence between SYN packets and FIN packets is maintained to close a security hole.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: October 16, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Brett Howard, Jean-Marc Robert, Paul Kierstead, Scott David D'Souza
  • Patent number: 7283461
    Abstract: Methods and apparatus for detecting denial of service attacks on a system in a communications network are provided. A frequency analysis is performed on certain types of packets that arrive with a periodic nature. A frequency power spectrum obtained through Fourier Transform reveals whether the power level of any particular frequency is greater than the average power spectrum. The detection of a higher than average power level is an indication that an attack is in progress.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: October 16, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Scott D'Souza, Paul Kierstead
  • Patent number: 7283917
    Abstract: A timing calibration system for an adjustable delay time of a delay module for an electronic circuit is provided. The system includes a control delay module including at least one calibration delay module, the control delay module having a second delay time. The system also includes a timing module associated with the control delay module, a comparison module associated with the timing module and an adjustment module for the delay module. The timing module measures the second delay time, the comparison module compares the second delay time with a desired delay time and produces a comparison result and the adjustment module calibrates the adjustable delay time utilizing the comparison result.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: October 16, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Henry Steven Greidanus, Rami Emad Labib
  • Patent number: 7284269
    Abstract: A communications security system has been described. The security system in the form of a firewall is made up of a plurality of communicatively coupled sets of modules in a matrix configuration. The modules may be implemented in hardware and software in order to rely on the advantages of each technology. Data packets are typically coupled to an ingress side of the firewall where policy rules having the highest importance are checked first. The result is a high speed system having carrier class availability.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: October 16, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Bertrand Marquet, Scott David D'Souza, Paul Kierstead
  • Patent number: 7280543
    Abstract: A method of processing OAM messages by network elements in a communications network is described. Elements in the network are provided with configuration information respecting OAM messages together with connection signaling upon setting up a call through the network. Each network element interprets the OAM messages and derives therefrom configuration information for use in executing an OAM function.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: October 9, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Cheng-Yin Lee, Amr Elkady
  • Patent number: 7260083
    Abstract: A method of timing an attempt to establish a connection path between a first and second node in a communications network is provided. The method initiates the attempt to establish a connection path after a period of time has elapsed wherein the period of time is greater than another period of time which had previously elapsed between two previous attempts, if any, to establish the connection.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: August 21, 2007
    Assignee: Alcatel Canada Inc.;
    Inventors: Mike Reeves, Nutan Behki, David Toscano, Ken Dubuc
  • Patent number: 7257121
    Abstract: A system and method of translating a set of transmission parameters related to a first transmission protocol from said first transmission protocol to a second transmission protocol for a data element being sent on a connection from a first communication network utilizing the first transmission protocol to a second communication network utilizing the second transmission protocol is provided. The method includes mapping a first parameter from the set of transmission parameters to a class of service value for the connection and mapping the class of service value and a second parameter from the set of transmission parameters to another parameter for the second transmission protocol.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 14, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Timothy Harris Kuhl, Mark Jason Thibodeau, David J. Maxwell, David Andrew Watkinson, John C. Fischer
  • Patent number: 7254112
    Abstract: A method and apparatus for sending packets from traffic flows to queues in a network element is provided. Each traffic flow has a packet size parameter indicating a sizing constraint for its packets. The method includes the step of grouping the traffic flows into groups utilizing the packet size parameter of each traffic flow. The method further includes the step of sending packets only from traffic flows of one group to at least one designated queue. Traffic flows of the one group are identified utilizing the packet size parameter of each traffic flow.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: August 7, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Jerome Cornet, John C. Fischer, Jason Sterne, Peter Donovan
  • Publication number: 20070165578
    Abstract: Physical layer interface system for use in a broadband wireless access communication network is provided. The broadband wireless access communication network comprises a base station, a subscriber station and a wireless communication link for transmitting wireless communication signals upstream and downstream between the base station and the subscriber station. The physical interface system comprises a first physical layer interface for the base station for processing the communication signals upstream and downstream between the subscriber station and the base station and a second physical layer interface for processing communication signals upstream and downstream between the subscriber station and the base station. The first physical layer interface transmits downstream transmission of communication signals from the base station to the subscriber station in a burst mode.
    Type: Application
    Filed: March 23, 2007
    Publication date: July 19, 2007
    Applicant: ALCATEL CANADA INC.
    Inventors: Jung Yee, Jeff Foerster
  • Patent number: 7233568
    Abstract: A system for selecting an active control path link as a communication link between a control shelf and a controlled shelf in a multi-shelf network element is provided. The system includes a first and a second control path links connecting the control shelf to the controlled shelf. The system also includes an assessment module adapted to assess health of transmissions sent through each of the first and the second control path link and a selection module associated with the assessment module. The selection module is adapted to select the active control path link as either of the first and the second control path link utilizing a health report relating to the first and the second control path link generated by the assessment module.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: June 19, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Kevin Goodman, Jude Binette, Jean Labonte, Joseph Soetemans
  • Patent number: 7234000
    Abstract: A router is disclosed for use in a network to carry data packets therein. Each router provides a hop along a path through the network extending from a source network address node to a destination network address node. Each route for routing data packets contains a destination network address to a next successive hop along a path between the source network address and the destination network address. Each router has a central routing processor in communication with its forwarders over a control medium to provide routing tables to each forwarder defining the next hop for forwarding received data packets for each destination address. Routing table updates of the forwarders by the central routing processor are sequentially downloaded to all forwarders simultaneously from the central routing processor, using a negative acknowledgement protocol. The central routing processor selectively responds to a negative acknowledgement message from a forwarder to re-transmit routing table updates.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: June 19, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: William Ross McEachern, Aaron Matthew Willis Brumpton, Steven William Buchko
  • Patent number: 7233987
    Abstract: The invention provides a system and method for generating and evaluating a request in a protocol from another request formed in another protocol. Therein, the request relates to a change of membership to a group and the group relates a service to a host of the service in a communication network. In particular, the method comprises receiving said request, identifying a target group from said request, identifying an associated host to said target group and generating in another protocol another request containing a reference to said target group and said associated host. The request identifies said group and does not uniquely identify said associated host. The invention provides the ability to block a request from proceeding further if it does not belong to a recognized group.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: June 19, 2007
    Assignee: Alcatel Canada Inc.
    Inventor: David A. Watkinson
  • Patent number: 7228356
    Abstract: Method and apparatus for improving channel changing or channel surfing functionality in IGMP supported services.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: June 5, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Dat Ba Nguyen, Bakri Aboukarr, Gregory Erich Gyetko
  • Patent number: 7222191
    Abstract: Advertising available resource information for a link in a communication network is provided. The network uses a source routing protocol. The source routing protocol uses the available resource advertisements for identifying a path for a call routed through the node in the network. The method advertises the available resource information for the node to adjacent nodes linked to the node in the network when the node receives a request for a connection to be routed over the link, the request seeking resources exceeding available resources for the link, but not exceeding the last advertised resources for the link.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: May 22, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Andrew Dolganow, Shawn P. McAllister
  • Patent number: 7212528
    Abstract: A system and method of reassembling packets from traffic flows in a network element is provided. Each of the packets has at least one data part. The method includes the steps (1) queuing each of the data parts of the packets of traffic flows in a single reassembly queue in a sorted order, the data parts of each of the packets being continuously grouped without data parts of another packet being interleaved therein and (2) reassembling the data parts of each of the packets queued in the single reassembly queue.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: May 1, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Timothy Harris Kuhl, Mark Jason Thibodeau, David Michael Motz
  • Patent number: 7209477
    Abstract: A multi-shelf communication system for a communication switch having shelves is provided. There is a master generating commands and receiving status signals, slaves associated with the master, a communication controller per slave, a downstream communication link providing a multiplexed signal of communications from each controller and providing a demultiplexed signal split from the multiplexed signal to each slave, an upstream communication link from each slave to its controller, and a timing arrangement controlling transmission times for the downstream communication link. Each slave can be located on one the shelves and receives commands, executes local commands responsive to the commands and generates status signals for the master. Each controller receives commands, transmits commands to its slave and receives status signals and provides information relating to the status signals to the master controller. Local commands replace other commands directed by the master to the slave.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: April 24, 2007
    Assignee: Alcatel Canada Inc.
    Inventor: Dion Pike
  • Patent number: 7209455
    Abstract: Physical layer interface system for use in a broadband wireless access communication network is provided. The broadband wireless access communication network comprises a base station, a subscriber station and a wireless communication link for transmitting wireless communication signals upstream and downstream between the base station and the subscriber station. The physical interface system comprises a first physical layer interface for the base station for processing the communication signals upstream and downstream between the subscriber station and the base station and a second physical layer interface for the subscriber station for processing the communication signals upstream and downstream between the subscriber station and the base station. The first physical layer interface transmits downstream transmission of communication signals from the base station to the subscriber station in a burst mode.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: April 24, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Jung Yee, Jeff Foerster
  • Patent number: 7206287
    Abstract: The present invention provides a system and method of identifying a failure location in a datapath in a communication element, the datapath traversing from an ingress point through at least a first component to an egress point. In an embodiment the method comprises: providing a diagnostic cell to adapted to be inserted at a startpoint upstream of the first component in the datapath; providing at least a first diagnostic cell counter module adapted to be associated with a first location in the first component, the first diagnostic cell counter module being adapted to recognize when the diagnostic cell passes the first location and being adapted to track passage of the diagnostic cell past the first location; inserting the diagnostic cell into the datapath at the starting point; and analyzing the diagnostic cell counter module to identify the failure location in the datapath.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: April 17, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: John Tiong-Heng Chuah, Joseph Moffette
  • Patent number: 7200110
    Abstract: There is provided a method and apparatus for the ordered release of connections from a network entity in a signalling communications network upon the detection of the failure of a signalling link or a port corresponding to such connections. A priority indicator is associated with each of the connections. Each priority indicator is selected from a priority hierarchy having several priority levels which varies from highest priority to lowest priority. Upon detection of the failure of a signalling link or port, every connection associated with the failed signalling link or port is released. The release of the connections takes place at the network entity in a sequence which corresponds to the priority hierarchy. A method and device are also provided for the ordered release of connections carried on a logical truck having a variable capacity, for example an IMA trunk, upon the detection of a reduction in capacity. The IMA trunk may be provided on several physical links.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: April 3, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: John C. Burns, Jonathan L Bosloy
  • Patent number: 7197033
    Abstract: A system and method of configuring a communications path in a communications network from a start node to an end node through intermediate nodes is provided by: establishing a partial path for the communications path from the start node to a terminating node in the intermediate nodes; and at the terminating node, if a communications link to a next-hop node does not exist in the intermediate nodes, then establishing the terminating node as an interim egress node for the communications path; and notifying the start node of mapping parameters for the partial communications path.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: March 27, 2007
    Assignee: Alcatel Canada Inc.
    Inventors: Mike Reeves, Nutan Behki, David Toscano, Ken Dubuc