Ring Or Loop Forms Backbone For Interconnecting Other Networks Patents (Class 370/404)
  • Patent number: 7809275
    Abstract: This disclosure concerns transceivers that include CDR bypass functionality. In one example, a 10 G XFP transceiver module includes integrated CDR functionality for reducing jitter. The 10 G XFP transceiver module also implements CDR bypass functionality so that the CDR can be bypassed at rate less than about 10 Gb/s, such as the Fibre Channel 8.5 Gb/s rate for example.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: October 5, 2010
    Assignee: Finisar Corporation
    Inventors: Lewis B. Aronson, Thomas Gordon Beck Mason, Yuxin Zhou, Huy Anh Vu, Giorgio Giaretta, Jiashu Chen
  • Patent number: 7801118
    Abstract: The Fibre Channel standard was created by the American National Standard for Information Systems (ANSI) X3T11 task group to define a serial I/O channel for interconnecting a number of heterogeneous peripheral devices to computer systems as well as interconnecting the computer systems themselves through optical fiber and copper media at gigabit speeds (i.e., one billion bits per second). Multiple protocols such as SCSI (Small Computer Serial Interface), IP (Internet Protocol), HIPPI, ATM (Asynchronous Transfer Mode) among others can concurrently utilize the same media when mapped over Fibre Channel. A Fibre Channel Fabric is an entity which transmits Fibre Channel frames between connected Node Ports. The Fibre Channel fabric routes the frames based on the destination address as well as other information embedded in the Fibre Channel frame header. Node Ports are attached to the Fibre Channel Fabric through links.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: September 21, 2010
    Assignee: Emulex Design & Manufacturing Corporation
    Inventor: Stuart B. Berman
  • Patent number: 7801117
    Abstract: The Fibre Channel standard was created by the American National Standard for Information Systems (ANSI) X3T11 task group to define a serial I/O channel for interconnecting a number of heterogeneous peripheral devices to computer systems as well as interconnecting the computer systems themselves through optical fiber and copper media at gigabit speeds (i.e., one billion bits per second). Multiple protocols such as SCSI (Small Computer Serial Interface), IP (Internet Protocol), HIPPI, ATM (Asynchronous Transfer Mode) among others can concurrently utilize the same media when mapped over Fibre Channel. A Fibre Channel Fabric is an entity which transmits Fibre Channel frames between connected Node Ports. The Fibre Channel fabric routes the frames based on the destination address as well as other information embedded in the Fibre Channel frame header. Node Ports are attached to the Fibre Channel Fabric through links.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: September 21, 2010
    Assignee: Emulex Design & Manufacturing Corporation
    Inventor: Stuart B. Berman
  • Patent number: 7801134
    Abstract: A VoIP system has a VoIP server and plural clients. The client transmits paging data as multicast packets addressed at a specific multicast address, to other clients. In response to a request from the client, the VoIP server transmits multicast packets of MOH data to the other clients. At this time, whether the other clients can receive multicast packets is determined. To the clients that are determined to be capable of receiving multicast packets, transmission data is sent in the form of multicast packets. To the client which belongs to a router and is determined to be incapable of receiving multicast packets, the transmission data is sent as unicast packets. It is thus possible for the VoIP system to support paging and MOH in the form of multicast packets, with respect to clients incapable of receiving multicast.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: September 21, 2010
    Assignee: NEC Infrontia Corporation
    Inventors: Masato Hori, Yoshikazu Kobayashi
  • Patent number: 7797382
    Abstract: Publish-subscribe XML multicast service within a VPN service is described. A backbone such as an IP/MPLS backbone connects multiple subscriber sites using VPN technology and VPN edge routers. XML publish-subscribe modules are addressable within the VPN and form an overlay network between the edge routers participating in the VPN. The XML publish-subscribe modules may perform either topic-based multicast or content-based multicast services. The multicast service is self-managed.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: September 14, 2010
    Assignee: Alcatel Lucent
    Inventor: Bashar Said Bou-Diab
  • Patent number: 7782845
    Abstract: An apparatus, system, and method are disclosed for automatically and transparently managing addresses in an arbitrated loop network. An arbitrated loop network switch is programmed with an address map and configured with the necessary modules to monitor an address assignment process and associate soft assigned addresses claimed during the address arbitration process with physical slot addresses. In one embodiment, the address fields of packets addressing a specific physical slot are changed (in route) to the soft address assigned during the address arbitration process. The entire process may be transparent to the rest of the network and to users. The present invention facilitates maintaining a physically ordered addressing scheme despite any soft addressing that occurs during loop initialization.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: August 24, 2010
    Assignee: International Business Machines Corporation
    Inventors: Matthew David Bomhoff, Brian James Cagno, Gregg Steven Lucas, Kenny Nian Gan Qiu, Andrew Ellis Seidel
  • Patent number: 7778162
    Abstract: A data transmission apparatus used in a multiple service ring includes at least two nodes coupled to at least one aggregate pipe and at least one tributary. The data transmission apparatus includes a tributary RX framer coupled to a tributary for deframing data frames received from the tributary and extracting a destination node address and a TX framer for encapsulating the destination node address and the data received from the tributary into frames of the multiple service ring and transmitting the same along an aggregate pipe to a downstream neighbor node in the ring.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: August 17, 2010
    Assignee: Wuhan Fiberhome Networks Co. Ltd.
    Inventor: Shaohua Yu
  • Patent number: 7756146
    Abstract: In receiving a MAC (media access control) frame whose destination address is any of a broadcast address, an unknown multicast address and an unknown unicast address, the flooding is reduced by broadcasting the received MAC frame to all the other ports than one that has received the MAC frame. An output control that attains this object is realized by using a destination group identifier (ID) look-up table (2-T1) which enables a look-up of a destination group ID by using, as a key, any one or combination of header information of the MAC frame, a port which received the MAC frame and a service VLAN (virtual local area network) ID corresponding to the MAC frame and a backbone port look-up table (2-T2) which enables a look-up of at least one backbone port which is to transmit or at least one backbone port which is not to transmit by using the destination group ID as a key.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: July 13, 2010
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kunio Hato, Muneyoshi Suzuki
  • Patent number: 7756145
    Abstract: A network architecture for implementation in a vehicle is described that comprises an Ethernet gateway module (EGM) and network interface module (NIM). The EGM comprises an Ethernet switch and router therein and is configured to provide an open data network (ODN) connection to the network architecture for a plurality of open data network devices. The NIM is configured to provide an isolated data network and comprises an Ethernet switch to connect a plurality of secure devices to an isolated data network (IDN), the secure devices related to operation and navigation of the vehicle, a router and a gateway/router. The router is configured to interface the IDN to the open data network connections and comprises a packet filtering function to determine which, if any, data from the ODN may be passed through to the IDN and applied to operation and navigation of the vehicle via the secures devices connected to the IDN.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: July 13, 2010
    Assignee: The Boeing Company
    Inventors: Christopher B. Kettering, Daniel B. Moore, Freelon F. Hunter, Jeffery L. Toolson, Charles D. Royalty, Michael N. Jacobs
  • Patent number: 7742426
    Abstract: A system, method, and computer-readable medium for performing network system diagnostics is provided. The method includes obtaining a respective identification of a first target device and a second target device deployed in a network; iteratively querying neighbor devices of at least one node in a communications path between the first and second target devices, wherein the neighbor devices and the first and second target device may comprise heterogeneous network nodes; and generating a layer 2 path trace that comprises identification of network devices interconnected on a physical path between the first and second target devices. A computer-readable medium includes instructions for execution by a processing system, wherein the instructions are configured to perform the foregoing method. A system includes a data processing system including a processor device for executing a diagnostics engine implemented as a set of computer-executable instructions configured to perform the foregoing method.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: June 22, 2010
    Assignee: Netiq Corporation
    Inventors: Michael Tod Schumacher, Jeffrey Todd Hicks
  • Patent number: 7733900
    Abstract: An integrated circuit device for use in connecting synchronous optical networks to packet networks and synchronous time division multiplexed subscriber lines and a method of operation of same is disclosed. An embodiment of the invention may include SONET/SDH compatible optical carrier framing, cross connect, and packet mapping functionality. In addition, it may support Ethernet packet network connections and DS1/E1 and DS3/E3 time division multiplexed subscriber circuits, and may include a telecom bus compatible interface for the connection of additional communications devices. An embedded microprocessor core and embedded memory may permit the present invention to support enhanced remote diagnostic, trouble reporting, traffic management, and software update capabilities.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: June 8, 2010
    Assignee: Broadcom Corporation
    Inventor: Jean-Marc Guy Patenaude
  • Patent number: 7729297
    Abstract: In one embodiment, a node comprises an interface to communicatively couple the node to a channel. The channel communicatively couples the node to a first neighbor node in a first direction and to a second neighbor node in a second direction. When the first neighbor node is scheduled to transmit and the node receives data from the first neighbor node via the channel, the node determines if the transmission of the data complies with a policy. When the transmission of the data does not comply with the policy, the node does at least one of: blocks the data from being relayed along the channel and relays the data along the channel with information indicating that the transmission of the data does not comply with the policy.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: June 1, 2010
    Assignee: Honeywell International Inc.
    Inventors: Brendan Hall, Kevin R. Driscoll
  • Patent number: 7720080
    Abstract: A relay unit capable of inquiring of a DNS comprises: an inquiry section which transfers an acquisition request of a transmission destination terminal address, sent from a transmission source terminal, to the DNS, and acquires the transmission destination terminal address and a transmission destination label corresponding to the transmission destination terminal address and transmission destination terminal; a label creation section which creates a unique relay label; a label storage section which correlates the created relay label to the acquired transmission destination terminal address and transmission destination label, and stores thus obtained label; a label transmission section which transmits the relay label and a private address of the relay unit to the transmission source terminal; and a determination section which, if a packet containing the relay label is received from the transmission source terminal, determines that the transmission destination terminal address and transmission destination label
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: May 18, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshitaka Uchida, Norihiro Ishikawa
  • Patent number: 7716406
    Abstract: Embodiments of the present invention provide a system and method for handling persistent reservations. More particularly, according to one embodiment of the present invention, a routing device that routes commands from multiple initiators to a target device can assert reservations for the initiators using its own reservation key rather than a reservation key provided by an initiator. The routing device can further maintain a registry of keys for multiple initiators that access the target device through the routing device. For a persistent reservation command received using a persistent reservation key in the registry, the routing device can forward the command to the target device server using the routing device's key. Thus, reservations for the multiple initiators will be held using the routing device's key. For persistent reservation commands received from initiators registered with the routing device, the routing device can handle conflict resolution and other persistent reservation processing.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: May 11, 2010
    Assignee: Crossroads Systems, Inc.
    Inventor: John F. Tyndall
  • Patent number: 7697552
    Abstract: A method for communication is used in a communication network that includes multiple ring nodes arranged in at least first and second ring networks, which are connected by one or more of the ring nodes serving as interconnect nodes. A data packet is accepted from a source user node served by the first ring network, for forwarding to a destination user node served by the second ring network. An identifier, which identifies an interconnect node in the first ring network through which the data packet is to be forwarded to the second ring network, is attached to the data packet in the first ring network. The data packet is forwarded over the first ring network, accepted at the interconnect node and, responsively to the identifier, forwarded from the interconnect node to the second ring network. The data packet is forwarded over the second ring network to the destination user node.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: April 13, 2010
    Assignee: Corrigent Systems Ltd.
    Inventor: Leon Bruckman
  • Patent number: 7672229
    Abstract: The invention discloses a method for dynamically allocating link bandwidth on resilient packet ring. This algorithm comprises the steps of measuring a group of variables in one advertisement interval, calculating the local fair rate using the measured variables, determining an advertising rate based on the local fair rate, and transmitting the data packets with the advertising rate. Compared with existing fairness algorithms, the new algorithm introduces integration for the idle rate to achieve 100% of bandwidth utilization. It also avoids using the concept of “congestion state” which is essential in the existing fairness algorithm.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: March 2, 2010
    Assignee: ZTE Corporation
    Inventors: Li Mo, Xuefei Wei
  • Patent number: 7668184
    Abstract: A method and system for designing a bi-connected ring-based network is provided, which designs from scratch or converts an existing network to a dual-homed ring-based network. The network covers the locations capable of being bi-connected with one or more cycles/rings. The traffic demand is then routed via the cycles, in such a way so as to minimize the amount of network traffic management equipment required.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: February 23, 2010
    Assignee: Tellabs Operations, Inc.
    Inventors: Timothy Y. Chow, Philip J. Lin, James D. Mills
  • Patent number: 7664018
    Abstract: Methods and apparatus for switching Fiber Channel Arbitrated Loop Systems is provided between a plurality of Fiber Channel Loop devices. In one aspect of the invention, the system switches based at least in part on arbitrated loop primitives. An exemplary interconnect system may include a first port and a second port, both including port logic to monitor certain arbitrated loop primitives, a connectivity apparatus, a route determination apparatus including a routing table consisting of ALPA addresses and their associated ports, the route determination apparatus coupled to each port and the connectivity apparatus, where the connectivity apparatus creates paths between the ports based on arbitrated loop primitives. In one embodiment, the connectivity apparatus is a crossbar switch. Examples of the arbitrated loop primitives that cause the switch to create paths between ports includes one or more of the following: ARB, OPN and CLS.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: February 16, 2010
    Assignee: Emulex Design & Manufacturing Corporation
    Inventors: Bruce Gregory Warren, William Goodwin, Carl Mies, Michael L. White, Warren Eng, Bruce E. Johnson
  • Patent number: 7649835
    Abstract: In one embodiment, a node comprises an interface to communicatively couple the node to a first channel. The first channel communicatively couples the node to a first neighbor node and a first neighbor's neighbor node in a first direction. When the node is operating in an unsynchronized mode: the node relays, along the first channel, for a relay period, data received from the first neighbor node that was sourced from that first neighbor node and, after relaying the data received from the first neighbor node that was sourced from that first neighbor node and for a block period, the node blocks data received from the first neighbor while the node relays, along the first channel, data received from the first neighbor's neighbor node.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: January 19, 2010
    Assignee: Honeywell International Inc.
    Inventors: Brendan Hall, Kevin R. Driscoll, Michael Paulitsch
  • Patent number: 7649847
    Abstract: The present invention discloses novel network architectures for evolving traditional service provider networks. The network architecture of the invention has a transport layer including an optical network. At least one node of the network architecture includes a large packet switch that is coupled to the transport layer and to an access layer. The large packet switch aggregates a plurality of services from the access layer. The large packet switch also performs packet level grooming of the information from the services prior to transport of the information via the transport layer. The optical network performs restoration for the network architecture. In one embodiment, the optical network is an optical ring network including at least one optical switch and restoration is performed at the layer-0 (optical layer).
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: January 19, 2010
    Assignee: Nortel Networks Limited
    Inventors: Humair Raza, Ra'ed Awdeh, Kesavamurthy Nagaraj
  • Patent number: 7646767
    Abstract: A method and system for routing fiber channel frames using a fiber channel switch element is provided. The switch element includes, a hashing module whose output is used to select the column from a look up table to route frames. The method includes, indexing a look up table using domain, area, virtual storage area network identifier, a hashing module output and/or AL_PA values; selecting a column from the look up table based on a column select signal; and routing a frame if a route is valid. The hashing module takes a fiber channel header to generate a pseudo random value used for selecting a column from the look up table. The hashing module uses same field values in an exchange to generate the pseudo random value. A hash function is used on a frame's OX_ID, D_ID, S_ID, and/or RX_ID to route fiber channel frames.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: January 12, 2010
    Assignee: QLOGIC, Corporation
    Inventors: Frank R Dropps, Edward C McGlaughlin, Steven M Betker
  • Patent number: 7643424
    Abstract: A method of encapsulating data packets for use in a distributed computer network is disclosed. The method includes providing a data packet for transmission over the distributed computer network, the data packet selected from one of a customer data packet and an OAM data packet; and encapsulating the data packet with a medium access control outer packet. The disclosed data packet handling method includes receiving a data packet from a customer facing data port, the customer facing data port within a network node of a computer network; performing medium access control (MAC) learning for the received packet; determining whether the data port is a MAC-in-MAC port; performing a packet mapping to a destination address based on a service provider destination address; and encapsulating the received data packet with a header associated with the service provider.
    Type: Grant
    Filed: March 22, 2003
    Date of Patent: January 5, 2010
    Assignee: AT&T Intellectual Property l, L.P.
    Inventors: Kuo-Hui Liu, Cheng-Hong Hu, Chin Yuan, Chou Lan Pok
  • Patent number: 7639702
    Abstract: A plug-in card for an optical transmission apparatus includes a J1generating unit. The J1 generating unit sends information on on-use side J1 data to a plug-in card at a spare side in a redundant structure when the plug-in card operates as an on-use side plug-in card. The J1 generating unit receives information on on-use side J1 data from a plug-in card at the on-use side when the plug-in card operates as a spare side plug-in card. Based on the information, the J1 generating unit matches spare side J1 data to the on-use side J1 data. The plug-in card also includes a B3 byte calculating unit that operates in a similar way as the J1 generating unit does in processing B3 byte data.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: December 29, 2009
    Assignee: Fujitsu Limited
    Inventors: Hideki Matsui, Mitsuhiro Kawaguchi, Masahiro Shioda, Ryuji Kayama, Takashi Kaiga
  • Patent number: 7636366
    Abstract: A transmitter forms each subcarrier group of only frequency locations of subcarriers to which at least one pilot signal is allocated, and conducts transmission by allocating a macro-diversity signal into the subcarrier group and allocating a non-macro-diversity signal to other frequencies (outside the subcarrier group). As for the macro-diversity signal, a receiver conducts channel estimation on the basis of the pilot signal in the same subcarrier group as the macro-diversity signal. As for the non-macro-diversity signal outside the subcarrier group, the receiver conducts channel estimation on the basis of the pilot signal, and results of channel estimations of the macro-diversity signal and other non-macro-diversity signals.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: December 22, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Shigeo Terabe
  • Patent number: 7633957
    Abstract: A relay device 10 is a relay device for relaying a communication message on a packet-by-packet basis, which comprises an order determiner 13 for determining whether a packet received is one received in an order to be received, a packet holder 14 for, when it is determined that the packet is not one received in the order to be received, holding the packet, and for performing such a control as to relay the packet, a merger 15 for merging a payload of the received packet with a payload of the held packet, a verifier 16 for verifying whether a payload of a packet satisfies a predetermined rule, and a relay controller 17 for, when a packet satisfies the rule, performing such a control as to execute relay of the packet. This prevents an increase of a communication delay and enables detection of an irregular communication message in an application layer protocol, irrespective of types of protocols.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: December 15, 2009
    Assignee: Japan Science and Technology Agency
    Inventors: Kenji Kono, Takahiro Shinagawa, Md. Rahat Kabir
  • Patent number: 7630300
    Abstract: Methods and apparatus for switching Fiber Channel Arbitrated Loop Systems is provided between a plurality of Fiber Channel Loop devices. In one aspect of the invention, the system switches based at least in part on arbitrated loop primitives. An exemplary interconnect system may include a first port and a second port, both including port logic to monitor certain arbitrated loop primitives, a connectivity apparatus, a route determination apparatus including a routing table consisting of ALPA addresses and their associated ports, the route determination apparatus coupled to each port and the connectivity apparatus, where the connectivity apparatus creates paths between the ports based on arbitrated loop primitives. In one embodiment, the connectivity apparatus is a crossbar switch. Examples of the arbitrated loop primitives that cause the switch to create paths between ports includes one or more of the following: ARB, OPN and CLS.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: December 8, 2009
    Assignee: Emulex Design & Manufacturing Corporation
    Inventors: Bruce Gregory Warren, William Goodwin, Carl Mies, Thomas Hammond-Doel, Michael L. White
  • Patent number: 7631077
    Abstract: A method and system for providing harmonized public security and safety services to multiple public security and safety control centers, the public security and safety control centers being adapted to control terminals over at least one access communication network. The method includes the following steps: providing multiple public security and safety control centers access to a service platform, with the service platform containing an application server layer and a communication layer; upon service request of one of the public security and safety control centers, executing a corresponding application on the application server layer of the service platform, the application generating at least one command to be executed in one of the access communication networks; forwarding the command said the communication layer to the appropriate gateway and executing the command in the access communication network.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: December 8, 2009
    Inventors: Carsten Smago, Dieter Kopp, Peter Domschitz, Klaus Stocker, Marco Tomsu
  • Patent number: 7623446
    Abstract: A virtual ring representing a community of interest is constructed from an interconnected mesh of nodes in a packet network. The virtual ring instantiates ring labels in respective forwarding tables for each node in the virtual ring and then advertises the ring labels to all other nodes in the virtual ring, for example by flooding BGP advertisements. Data packets entering the ring are assigned a ring label which is then stripped off when exiting the ring. The data packets are forwarded around the virtual ring using the ring labels. The virtual ring can operate using BGP/LDP Multi Protocol Label Switching (MPLS). Multiple virtual rings can be bridged together using a central hub or alternatively multiple virtual rings can be redundantly bridged together using tandem hubs.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: November 24, 2009
    Assignee: Nortel Networks Limited
    Inventors: David Allan, Peter Ashwood Smith
  • Patent number: 7606179
    Abstract: In one embodiment, a node comprises an interface to communicatively couple the node to a channel. The channel communicatively couples the node to a first neighbor node and a first neighbor's neighbor node in a first direction. When the node relays relayed data along the channel, the node compares data received from the first neighbor node with data received from the first neighbor's neighbor node. The relayed data comprises: at least one of: the data received from the first neighbor node and the data received from the first neighbor's neighbor node; and information indicative of the results of the comparison.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: October 20, 2009
    Assignee: Honeywell International, Inc.
    Inventors: Brendan Hall, Kevin Driscoll, Michael Paulitsch
  • Patent number: 7606224
    Abstract: A transmission apparatus includes an aggregate-side interface unit coupled to an optical transmission line, a cross-connect unit which performs cross-connect with respect to a synchronized digital signal supplied from the aggregate-side interface unit, and a network signal processing unit which switches the synchronized digital signal in a unit of a network signal as the synchronized digital signal is supplied from the cross-connect unit.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: October 20, 2009
    Assignee: Fujitsu Limited
    Inventors: Morihito Notani, Masahiro Nishio
  • Patent number: 7593346
    Abstract: The distribution of traffic flows in a load-sharing redundancy group that includes a first gateway device and a second gateway device includes assigning a first set of forwarding addresses to the first gateway device and a second set of forwarding addresses to the second gateway device. The redundancy group distributes forwarding addresses to hosts which in turn use the distributed forwarding addresses to send packets to the redundancy group. The traffic flow for each of the assigned forwarding addresses is measured and may be compared to a target traffic flow. The traffic flow is adjusted to close in on the target traffic flow. Adjustment of the traffic flow can be accomplished either by changing the existing measured traffic flow by re-assigning a forwarding address originally assigned to one gateway device to a different gateway device or by altering future distribution of forwarding addresses so that additional traffic is sent to one or more forwarding addresses having lower measured traffic.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: September 22, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Douglas McLaggan, Ian Herbert Wilson, Mark A. Denny, Rick L. Williams
  • Patent number: 7590130
    Abstract: A communications system comprising a first stage including a first scan table and a second stage including a second scan table. The first stage is configured to select a first channel identification from the first scan table and provide data from a channel identified by the first channel identification. The second stage is configured to receive the data and select a second channel identification from the second scan table to provide the received data at essentially a data rate of the channel on a synchronous network.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: September 15, 2009
    Assignee: Exar Corporation
    Inventors: Russell Homer, Khai Hoan Duong
  • Patent number: 7573893
    Abstract: A flexible cross-connect with a data plane is presented which allows the establishment of connections between network interfaces at any network interface card to another network interface on any other network interface card. The system can cross-connect connections at an STS-1 and VT 1.5 granularity, and allows the switching and routing of information in a data plane without the use of the cross connect fabric. This permits routing, bridging, and concentration of data services to be performed without burdening of the cross connect. For reliability, a range of protection configurations can be employed including 1:1, 1:5 and mixed 1:N protection. A backplane is used which provides point-to-point traces between each card and the cross connect unit, between each card and a timing, communications and control unit, and between the network interface cards themselves.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: August 11, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Paul M. Elliot, Ajaib S. Bhadare, Dyke T. Shaffer
  • Patent number: 7567758
    Abstract: A transceiver module having intergrated eye diagram opening functionality for reducing jitter is describe. The transceiver module may transmitter eye opener and a receiver eye opener integrated in a single circuit. The transceiver module may also include serial control and various other integrated components. Other functionalities that may be integrated on the transceiver module include loopback modes, bypass features, bit error rate testing, and power down mode.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: July 28, 2009
    Assignee: Finisar Corporation
    Inventors: Lewis B. Aronson, Rudy Hofmeister, Christopher Madden, Mark Farley, Dan Case, Tom Lenosky
  • Patent number: 7564859
    Abstract: The invention provides a method and system for enhancing the capability to optimally route VT circuits over SONET networks. The invention discloses a method for identifying Network Elements (NEs) that have VT capability (i.e., VT cross connect capability) and, when desired or required for VT circuit routing, manually or automatically topologically interconnecting these NEs by STS-1 circuits called VT Tunnels. Once interconnected, these VT Tunnels are suitable for supporting user VT traffic without the network operator being required to upgrade non-VT NE with VT capability or without having to exhaust the limited pool of available VT cross connects on one or more NEs.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 21, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: David A. Hillard, Anix Anbiah
  • Patent number: 7551633
    Abstract: Described herein are systems and methods in which taps, which mirror or provide a copy of network traffic, are connected to monitoring equipment through shadowing units, which pass data to the monitoring equipment but block outbound data transmissions from the monitoring equipment. Aggregation/dissemination units are provided to aggregate and/or disseminate tapped data network signals to the monitoring equipment. Also disclosed are optional bypass controllers that can either route the tapped data network signals directly to the monitoring equipment or route such signals through the aggregation/dissemination units.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: June 23, 2009
    Assignee: Capital One Financial Corporation
    Inventor: Robert F. MacBride
  • Patent number: 7535834
    Abstract: When an externally received data frame is transmitted at a station of a ring-shaped packet communication network, a congestion point in the communication network is defined as a boundary point, a frame addressed to a station located before the boundary point is transmitted at a first transfer rate, and a frame addressed to a station located after the boundary point is transmitted at a second transfer rate lower than the first transfer rate.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 19, 2009
    Assignee: Fujitsu Limited
    Inventors: Hiroyuki Honma, Satoru Saitoh, Kazuto Nishimura
  • Patent number: 7532634
    Abstract: A resilient packet network (RPR) device is connected to one or more rings to constitute an RPR network. The RPR device has a storage unit in which a correspondence between RPR device addresses, each indicating an RPR device connected to the one or more rings, and user device addresses, each indicating a user device accommodated in the RPR device, is stored. When the RPR device receives data addressed to a predetermined user device from a user device accommodated in the RPR device itself, if an RPR device address of an RPR device accommodating the predetermined user device is registered in the storage unit, an RPR header, in which the RPR device address is set as a destination RPR device address, is added to the data. The data with the RPR header is transmitted to the RPR network.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: May 12, 2009
    Assignee: Fujitsu Limited
    Inventors: Atsuko Higashitaniguchi, Hiroshi Kinoshita, Akira Tokunaga, Yoshihiro Shimizu, Takanori Choumaru
  • Patent number: 7529295
    Abstract: Determining a frequency and phase offset estimates include receiving a signal at an offset estimator. The received signal is zero-padded in the time domain to yield a zero-padded signal. A Fourier transform of the zero-padded signal is taken to yield a transformed signal. The maximum power of the transformed signal is established. Frequency and phase offset estimates are generated based on the maximum power of the transformed signal.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: May 5, 2009
    Assignee: Raytheon Company
    Inventor: Mohamed K. Nezami
  • Patent number: 7529267
    Abstract: A network includes multiple nodes interconnected to form a ring topology. These nodes support data transmissions over the network using tokens. To send and receive data over the network, nodes may process control messages. A node can receive a first token authorizing transmission on one of multiple data channels, generate a transmission control message identifying a destination node and the authorized data channel, and communicate the transmission control message to a next node. The node can also communicate a second token to the next node authorizing secondary transmissions on the authorized data channel, transmit data on the authorized data channel after communicating the transmission control message, and communicate the first token to the next node after communicating the second token to the next node.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: May 5, 2009
    Assignee: Fujitsu Limited
    Inventors: Hung-ying Tyan, Ching-Fong Su, Richard R. Rabbat, Takeo Hamada
  • Patent number: 7522619
    Abstract: Methods and apparatus for Fiber Channel interconnection is provided between a plurality of private loop devices through a Fiber Channel private loop device interconnect system. In the preferred embodiments, the Fiber Channel private loop device interconnect system is a fabric or an intelligent bridging hub. In one aspect of this invention, a Fiber Channel private loop device is connected to two or more Arbitrated Loops containing, or adapted to contain, one or more private loop devices. Preferably, the interconnect system includes a routing filter to filter incoming Arbitrated Loop physical addresses (ALPAs) to determine which Fiber Channel frames must attempt to be routed through the fabric. Numerous topologies of interconnect systems may be achieved.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: April 21, 2009
    Assignee: Emulex Design & Manufacturing Corporation
    Inventor: Stuart B. Berman
  • Patent number: 7512140
    Abstract: In an inter-ring connection method and device interconnecting a plurality of RPR rings, an inter-ring connecting device (interconnecting station) determines whether or not an RPR frame received from one ring is a broadcast frame; and resets, when the RPR frame determined to be the broadcast frame is relayed to another ring, a ttl of the frame so that a predetermined point between the inter-ring connection device itself and another identical inter-ring connection device opposed within a ring to be relayed is a cleave point. Also, topology information of the one ring is transmitted to another ring; topology information of each ring is held in a topology database; and an RPR frame is relayed (unicasted) between the rings by referring to the topology database based on a destination address of the RPR frame.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: March 31, 2009
    Assignee: Fujitsu Limited
    Inventors: Ryoichi Mutoh, Kazuto Nishimura
  • Patent number: 7508832
    Abstract: A method and system for communicating traffic on an emulated subnetwork of a telecommunications ring having a plurality of nodes interconnected by a transmission media includes obtaining traffic at a node on the telecommunications ring. The traffic is segmented into a plurality of discrete segments. A set of broadcast cells is generated by adding an address header to each segment. The address header identifies a virtual channel dedicated to the node on the subnetwork in the telecommunications ring. The set of broadcast cells are transmitted in the virtual channel of the subnetwork and within a frame of the telecommunications ring. At each remaining node on the telecommunications ring, in response to receiving the set of broadcast cells in the virtual channel, both retransmitting and processing the broadcast cells.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: March 24, 2009
    Assignee: Fujitsu Limited
    Inventors: Mario Romana, Michael P. Bottiglieri, Shilin Wang, Chemin Hsieh, Frank Schumeg
  • Patent number: 7509462
    Abstract: An advanced processor comprises a plurality of multithreaded processor cores each having a data cache and instruction cache. A data switch interconnect is coupled to each of the processor cores and configured to pass information among the processor cores. A messaging network is coupled to each of the processor cores and a plurality of communication ports. In one aspect of an embodiment of the invention, the data switch interconnect is coupled to each of the processor cores by its respective data cache, and the messaging network is coupled to each of the processor cores by its respective message station. Advantages of the invention include the ability to provide high bandwidth communications between computer systems and memory in an efficient and cost-effective manner.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: March 24, 2009
    Assignee: RMI Corporation
    Inventors: David T. Hass, Ricardo Ramirez
  • Patent number: 7502608
    Abstract: A method for communicating between an operator at an operator device and a user recipient includes enabling an operator of the operator device to enter a device-independent unique identifier for a user recipient by requiring interaction between the operator and the operator device without requiring interaction between the operator and software on the operator device that is designed for communication over an IP-based network. The method includes identifying an IP network address associated with the user recipient based on the device-independent unique identifier and routing a message entered by the operator to the determined IP network address.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: March 10, 2009
    Assignee: AOL LLC, a Delaware Limited Liability Company
    Inventor: Yair Goldfinger
  • Patent number: 7502334
    Abstract: In one embodiment, a node comprises an interface to communicatively couple the node to a channel. The channel communicatively couples the node to a first neighbor node and first neighbor's neighbor node in a first direction. When the first neighbor node is scheduled to transmit and the node receives data from the first neighbor node via the channel, the node forwards the data to the first neighbor's neighbor, receives other data from the first neighbor's neighbor, compares the data to the other data, and relays the data along the channel with information indicative of the comparison.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: March 10, 2009
    Assignee: Honeywell International Inc.
    Inventors: Brendan Hall, Kevin R. Driscoll, Michael Paulitsch
  • Patent number: 7496105
    Abstract: A technique retrieves computed path segments across one or more domains of a computer network in accordance with a stateless Path Computation Element (PCE) model. The stateless PCE model includes one or more PCEs configured to compute one or more path segments through the domains in response to a path computation request issued by, e.g., a Path Computation Client (PCC). Notably, each computed path segment is encrypted as a data structure to preserve confidentiality across the domains. Each PCE then cooperates to return a path computation response, including the encrypted path segments and an explicit route object (ERO) containing compressed path descriptions of the computed path segments, to the PCC.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: February 24, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Jean-Philippe Vasseur, Richard Bradford
  • Publication number: 20090046731
    Abstract: The Fibre Channel Credit Extender (FCCE) (600) is a network device that is disposed between and connected to an end node (210) and an optical repeater (220). The FCCE (600) contains as many buffer credits as necessary, to solve bandwidth problems in a network. In a situation where maximum bandwidth is required in both directions of a link, the FCCE (600) breaks a single logical link into three physically separated “linklets.” The short-distance linklets attain maximum bandwidth by use of the existing buffer credits of the end nodes. The long-distance linklet attains maximum bandwidth by use of very high receive buffer credits in the FCCEs (600). In this way, only those links that need maximum bandwidth over distances not covered by end-node credit counts need be attached to an FCCE (600). The FCCE (600) contains the optical repeater to gain distance on that link, and contains high credit count receive buffers to gain bandwidth on the link.
    Type: Application
    Filed: September 22, 2008
    Publication date: February 19, 2009
    Inventors: William R. George, Steven M. Betker
  • Patent number: 7486614
    Abstract: A data transmission apparatus for implementing multiple service flow in a multiple service ring is described. The apparatus includes a trunk pipe and at least two nodes each with at least one flow. The apparatus also includes a flow Rx framer for converting data received from the flow into data packets of a predetermined protocol, a transmission setup device for setting up information for packets of the predetermined protocol to be transmitted, and a Tx framer for encapsulating the information into frames of the MSR and transmitting the same along the trunk pipe to a downstream neighbor node along the ring.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: February 3, 2009
    Assignee: Wuhan Fiberhome Networks Co. Ltd.
    Inventor: Shaohua Yu
  • Patent number: 7471625
    Abstract: A source node of a network transmits a path setup message for requesting a traffic path to a destination node. First and second nodes, located between the source and destination nodes, establishes first and second parallel transport paths on a first fault recovery layer between them. The first node further includes a database for storing identities of the first and second paths as a single virtual link as viewed from the source node. The first node responds to the path setup message for accommodating the traffic path on a second fault recovery layer through the first transport path. Each node accommodates the traffic path through the second transport path when the first transport path fails. The first node advertises recovery type of the virtual link as equal to the recovery type of the first and second transport paths, and/or equal to most unreliable recovery type of its component links.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: December 30, 2008
    Assignee: NEC Corporation
    Inventor: Yoshihiko Suemura