Ring Or Loop Forms Backbone For Interconnecting Other Networks Patents (Class 370/404)
  • Patent number: 7468945
    Abstract: In a congestion control system for congestion controlling communications on a network, a congestion control node has a congestion detection part for detecting a congestion level of the communications in the congestion control node in question and a congestion notifying part for notifying other congestion control nodes on the network of congestion information detected by the congestion detection part. The congestion control node further has a part for receiving the congestion information from the other congestion control nodes and a congestion flow estimating part for estimating, with reference to the congestion information and a routing table for designating a transfer path to destination, a flow having the congestion level that is not less than a predetermined level in the transfer path to the destination.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: December 23, 2008
    Assignee: NEC Corporation
    Inventors: Nobuyuki Enomoto, Atsushi Iwata
  • Publication number: 20080310437
    Abstract: A method and corresponding apparatus allows unknown packet traffic, such as Ethernet traffic, to be carried on a Resilient Packet Ring (RPR) network without flooding the traffic on the RPR network. Modules in a station of the ring network compare a destination address in a packet traffic signal with known addresses and associate an identifier of a tunnel in the ring network with the packet traffic signal based on the comparison. The modules then associate with the packet traffic signal an identifier of a destination station in the ring network that corresponds to the identifier of the tunnel and forward the packet traffic signal to the destination station via the tunnel. By transmitting the packet traffic via tunnels instead of flooding the RPR network, spatial reuse may be implemented allowing the network to support a higher volume of traffic.
    Type: Application
    Filed: June 15, 2007
    Publication date: December 18, 2008
    Applicant: Tellabs Operations, Inc.
    Inventors: Weiying Cheng, Chris R. Zettinger, Eric L. Chan, Matthew S. Vrba
  • Patent number: 7457302
    Abstract: A method for safely adding nodes to a network provides safeguards to prevent adding nodes beyond a maximum number of nodes allowed in the network. In one aspect, if the node to be added exceeds the maximum number of nodes allowed, the connection between the node to be added and the network is quarantined. If the node to be added does not exceed the maximum number of nodes allowed, the connection is confirmed. In another aspect, an additional test is made to determine if the connection between the network and the node to be added creates a loop within the network. In the case of a detected loop, the connection between the network and the node to be added is quarantined. If the connection does not create a loop, it is confirmed.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: November 25, 2008
    Assignee: Apple Inc.
    Inventor: Colin Whitby-Strevens
  • Patent number: 7453877
    Abstract: A method for data traffic transmission on a synchronous digital network to overcome the inefficiency of the data packet transmission on the synchronous digital network equipment. The method includes, adding a RPR processing module after Ethernet interface in the equipment; through the RPR processing module, an uplink Ethernet frame from Ethernet interface being mapped to a RPR frame; through LAPS/PPP/GFP protocol, the RPR frame being mapped into the payload of a synchronous digital network; the volume and number of the VCs and total bandwidth of the RPR being configurable. When the RPR frame arrives at the destination node of the RPR, it is stripped from the RPR and recovered to its original Ethernet frame. The method and device transmit data service efficiently, and the total bandwidth of the RPR is adjustable and is statistically multiplexed.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: November 18, 2008
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lingguang Kong, Jianfei He, Yong Tang
  • Patent number: 7453873
    Abstract: Methods and apparatus are disclosed for identifying the relevancy of packets. In one embodiment, source addresses are associated with network topology indications. When a packet is received, its network topology indication is compared with the corresponding one retrieved from a data structure to determine whether to drop the packet. Source addresses may also be associated with authorized interfaces to determine whether a packet was received on an authorized interface. In one embodiment, a maintained network topology indication is associated with a packet. After it is processed, the corresponding latest network topology indication is retrieved and compared with that previously associated with the packet. In one embodiment, upon a change in a network topology indication associated with an interface, control packets are placed in each of the queues corresponding to the destination interface, so it can be readily identified when this update has been propagated through the system.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: November 18, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Michael Lewis Takefman, Leonid Goldin
  • Patent number: 7447213
    Abstract: The present invention provides for a method and apparatus for an end-to-end connection between an RPR and an MPLS network, where the RPR network is linked to the MPLS network (and viceversa) through a TLS layer. In a preferred solution, the client layer is Ethernet, but any client layer can be considered.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: November 4, 2008
    Assignee: ALCATEL
    Inventors: Italo Busi, Pietro Grandi, Michele Fontana
  • Publication number: 20080259945
    Abstract: A communication circuit for use within a vehicle includes a first network port and a second network port that is remotely located from the first network port. The networks are digitally connected together and digitally communicate a signal therebetween. The communication circuit is used between two or more coupled train vehicles.
    Type: Application
    Filed: June 23, 2008
    Publication date: October 23, 2008
    Inventors: Chris Catterall, Pierre Rousseau, Sebastien Bouthillier, Anick Gravel, Ishak Jama, Christian Chaloux, Jason Daunais, Karine Turgeon
  • Patent number: 7436852
    Abstract: Disclosed herein is a resource allocation method for providing load balancing and fairness for a dual ring. The resource allocation method includes the step of determining whether a bandwidth allocation request message is received from one of other nodes. If the bandwidth allocation request message is received, it is determined whether one or more of two rings of the dual ring fulfill a request of the bandwidth allocation request message. If the rings fulfill the request, a path is allocated to one of the rings having a lower weighted cost. A resource allocation information notification message is provided to other nodes. If the rings cannot fulfill the request, the process ends.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: October 14, 2008
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hong Soon Nam, Heyung Sub Lee, Hyeong Ho Lee
  • Publication number: 20080240137
    Abstract: Methods and apparatus for Fibre Channel interconnection is provided between a plurality of private loop devices through a Fibre Channel private loop device interconnect system. In the preferred embodiments, the Fibre Channel private loop device interconnect system is a fabric or an intelligent bridging hub. In one aspect of this invention, a Fibre 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 Fibre Channel frames must attempt to be routed through the fabric. Numerous topologies of interconnect systems may be achieved.
    Type: Application
    Filed: June 12, 2008
    Publication date: October 2, 2008
    Inventor: Stuart B. Berman
  • Patent number: 7428211
    Abstract: A data transmission apparatus used in a multiple service ring is described. The apparatus includes at least two nodes coupled to at least one aggregate pipe and at least one tributary. The apparatus also includes a tributary TX framer for converting data received from the tributary, a transmission setup module for setting up information for processing protocol packets to be transmitted, a TX framer for encapsulating the information into frames of the MSR and transmitting the same along the aggregate pipe to a downstream neighbor node in the ring, and a RX framer for receiving and deframing data frames of the MSR from a upstream neighbor node. The apparatus also includes a transiting module for transiting the frames to the TX framer, a destination tributary determining module for determining a destination tributary, and a tributary RX framer for converting and sending protocol packets to a corresponding tributary.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: September 23, 2008
    Assignee: Wuhan Fiberhome Networks Co. Ltd.
    Inventor: Shaohua Yu
  • Patent number: 7426214
    Abstract: A network or interconnect structure 100 utilizes a data flow technique that is based on timing and positioning of messages communicating through the interconnect structure. Switching control is distributed throughout multiple nodes 102 in the structure so that a supervisory controller providing a global control function and complex logic structures are avoided. The interconnect structure operates as a “deflection” or “hot potato” system in which processing and storage overhead at each node is minimized. Elimination of a global controller and buffering at the nodes greatly reduces the amount of control and logic structures in the interconnect structure, simplifying overall control components and network interconnect components 104 and improving speed performance of message communication.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: September 16, 2008
    Assignee: Interactic Holdings, LLC
    Inventor: Coke S. Reed
  • Patent number: 7421203
    Abstract: A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and assigning a unique wavelength to each RNC; identifying a packet to be transmitted between the RNCs located within a same sub-ring using the assigned unique wavelength, and transmitting the packet through an SRC (Sub-Ring Controller); connecting m number of SRCs to one main-ring where the “m” is a positive integer, and assigning a unique wavelength to each SRC; and detaching a wavelength identification code from the packet to be transmitted between the RNCs located within different sub-rings, and transmitting the packet having the encapsulated wavelength identification code through an MRC (Main-Ring Controller).
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: September 2, 2008
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byoung Whi Kim, Jea Hoon Yu, Min Ho Kang
  • Patent number: 7415209
    Abstract: An Ethernet Optical Area Network (EOAN) system, and methods for implementing and using such an EOAN system, are disclosed. The EOAN system may be used to improve the speed and reliability of data communications networks for small to medium-sized companies in metropolitan area networks. The EOAN system provides end-to-end Ethernet protocol, enabling professionals to have high-speed data communications in real time. The EOAN system may be generally utilized for improving data communications between branch offices, home offices, campuses, and remote sites for a wide variety of industries. The present invention preferably includes a fiber optic ring, Network Operation Center (NOC), NOC architecture components, existing client equipment, and one or more Free Space Optic (FSO) devices, microwave communication technology, and/or data switching platforms to implement high-speed Ethernet-based connections such as within a specified metropolitan area.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: August 19, 2008
    Assignee: Innovative Fiber Optic Solutions, LLC
    Inventors: Patrick Heinz, Christopher Scheper, David Leary
  • Patent number: 7406029
    Abstract: A fiber-optic networking system that can survive a break in the fiber and restore full connectivity to all nodes in the network. The network can detect the presence of a cut in the fiber, locate the cut, recover from the cut, and restore the communication capacity that was available before the cut. The network is also capable of automatically determining the existence and identity of the nodes in the network, the distance of the node from the headend, and the executing procedures to handle both planned and unplanned (i.e., during a fault) removal of nodes from the network.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: July 29, 2008
    Assignee: NetApp, Inc.
    Inventors: Gene Ciancaglini, Michael Garofalo, James Hart, Steven Lumetta, Muriel Medard, John D. Moores, Salil A. Parikh, Mark R. Parquette, William Proulx, Michael Rydeen
  • Patent number: 7406084
    Abstract: A telephone switching network having a plurality of nodes interconnected through the network through channels having dynamically changeable capacity. The telephone switching network includes a plurality of switching nodes and a network manager responsive to each one of the nodes for allocating traffic capacity of the network among the nodes dynamically in accordance with the traffic requested at the plurality of nodes. Each one of the nodes is coupled to the network through an ATM ADM. Each one of the ATM ADMs is coupled to a narrowband switch through an ATM switch. The nodes are interconnected through an ATM SONET.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: July 29, 2008
    Assignee: Nokia Siemens Networks GmbH & Co. KG
    Inventor: Derek J. Underwood
  • Patent number: 7397813
    Abstract: In allocating bandwidth using a Resilient Packet Ring (RPR) fairness mechanism in a node connected to an RPR network, when congestion occurs, an amount of traffic that the node has transmitted to a ring during one aging interval is stored together with its own identifier in a fairness message as a fairness transmission rate to be advertised to its own upstream nodes. The amount of traffic transmitted from the upstream node during the aging interval is measured and stored. When the congestion has been solved, an available bandwidth is calculated with reference to the fairness transmission rate and the amount of traffic transmitted from the upstream nodes, and the fairness transmission rate is calculated to fairly allocate the available bandwidth to the upstream nodes so that the fairness transmission rate is transmitted to the upstream nodes.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: July 8, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Gu Choe, Jae-Hoon Lee, Byung-Chang Kang, Dong-Heon Lee
  • Patent number: 7397792
    Abstract: A time-shared network comprising edge nodes and optical core nodes may be dynamically divided into several embedded networks, each of which covering selected edge nodes. At least one of the edge nodes may host an embedded-network controller operable to form multiple-source flow-rate allocation requests each of the requests specifying flow-rate allocations to a plurality of paths from several source nodes to several sink nodes. A core node may also host an embedded-network controller or several embedded-network controllers. The time-shared network may use both time-division multiplexing and burst switching.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: July 8, 2008
    Assignee: Nortel Networks Limited
    Inventors: Maged E. Beshai, Bilel N. Jamoussi
  • Patent number: 7397788
    Abstract: Methods and apparatus for switching Fibre Channel Arbitrated Loop Systems is provided between a plurality of Fibre 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: July 8, 2008
    Assignee: Emulex Design & Manufacturing Corporation
    Inventors: Carl Mies, Bruce Gregory Warren
  • Patent number: 7391744
    Abstract: A bridged network system (20). The bridged network system comprises a plurality of bridge nodes (N0-N7). 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 (N0, N7, N6, N5, N1, N4, N3, N2). 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 (N0/N7; N1/N5; N1/N4) in the ordered sequence.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: June 24, 2008
    Assignee: Alcatel Lucent
    Inventors: Jessy Rouyer, Kamakshi Sridhar, Ljubisa Tancevski
  • Patent number: 7388872
    Abstract: A bandwidth brokering system and method incorporating methodology for supporting self-healing communication rings is disclosed. The present invention utilizes state-based tokens that are transmitted on a separate communication channel between network nodes to monitor and correct communication failures occurring at a link, interface, and network node level. The invention as taught permits generic brokering of all available network bandwidth in a granular method without the need for fixed designations of “protection” or “working” communication paths. As such, the present invention permits integration of “protection” and “working” communication data paths to permit full utilization of available system bandwidth with graceful recovery in the event of system or link malfunctions.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: June 17, 2008
    Inventor: Charles D. Montgomery, Jr.
  • Publication number: 20080137674
    Abstract: Systems and methods enable maximizing network data throughput via optimizing network capacity allocation. The network throughput maximization system comprises a network transporting data from source nodes to a destination node of the network, buffers for buffering data bytes to be sent from the source nodes to the destination node, and an element at the destination node that cyclically allocates the network capacity among the source nodes according to the amounts of data bytes arrived in the buffers at the source nodes during the previous capacity allocation cycle. The network data transport capacity allocation optimization method comprises steps of buffering at network source nodes data bytes to be transported to a network destination node, and cyclically allocating by the destination node the data transport capacity among the source nodes based on the relative volumes of bytes received in the buffers of the source nodes during the most recent capacity allocation cycle.
    Type: Application
    Filed: March 29, 2007
    Publication date: June 12, 2008
    Inventor: Mark Henrik Sandstrom
  • Patent number: 7372806
    Abstract: In a communications network where first and second nodes are interconnected by communication links, a source node transmits a path setup message for requesting a traffic path to a destination node. Each of the first and second nodes includes routing control means for establishing first and second transport paths on a first fault recovery layer between the first and second nodes. 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 from the source node for establishing the traffic path on a second fault recovery layer through the first transport path. The first and second nodes accommodate the traffic path through the second transport path when the first transport path is not working properly.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: May 13, 2008
    Assignee: NEC Corporation
    Inventor: Yoshihiko Suemura
  • Patent number: 7362769
    Abstract: A switch, switched architecture and process for transferring data through an FCAL switch is disclosed. The switch uses multiple switch control circuits each coupled to one FCAL network and all connected to a crossbar switch. The switch control circuits are coupled together by a protocol bus for coordination purposes. Local conversations can occur on each FCAL loop and crossing conversations through the switch can occur concurrently. The OPN primitive is used to establish the connection before any data is transferred thereby eliminating the need for buffer memory in the switch control circuits. The destination address of each OPN is used to address a lookup table in each switch control circuit to determine if the destination node is local. If not, the destination is looked up and a connection request made on the protocol bus. If the remote port is not busy, it sends a reply which causes both ports to establish a data path through the backplane crossbar switch.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: April 22, 2008
    Assignee: Broadcom Corporation
    Inventors: Alistair D. Black, Kurt Chan
  • Patent number: 7359358
    Abstract: A method of operating a wireless network with a base station and a plurality of outstations comprises transmitting a broadcast signal from the base station and in response to reception of the broadcast signal, transmitting an acknowledgement signal from an outstation. At least some of the outstations serve to relay signals for other outstations. An outstation relaying an acknowledgement signal appends to the signal an identifier identifying the relaying outstation. The base station, upon receipt of an acknowledgement signal, stores any appended identifier(s) for later use in routing signals to the outstation which originated that acknowledgement signal.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: April 15, 2008
    Assignee: British Telecommunications public limited company
    Inventor: Robert A Shipman
  • Patent number: 7359396
    Abstract: A core network shared by a large number of edge nodes comprises core nodes interconnected by core channels. Selected core channels are provided with buffers to enable temporal alignment of signals arriving at any core node from several other core nodes. A buffer may be provided at either end of a core channel. Otherwise, all other ports of the core node may be bufferless. Providing such buffers enables the construction of high-capacity wide-coverage network comprising a large number of core nodes shared by numerous edge nodes. Methods of temporal coordination among the network nodes are disclosed.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: April 15, 2008
    Assignee: Nortel Networks Limited
    Inventors: Maged E. Beshai, Bilel N. Jamoussi
  • Patent number: 7355978
    Abstract: Described is a method extending the OAM functionality in the RPR networks through a new OAM loopback procedure of request-reply type together with the definition of a new RPR OAM loopback frame. The OAM loopback function allows any RPR station to check the reachability of another RPR station. It is not necessary to stop any data traffic communication on the network in order to perform this function.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: April 8, 2008
    Assignee: Alcatel
    Inventors: Michele Fontana, Pietro Grandi, Italo Busi
  • Patent number: 7349700
    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: August 30, 2002
    Date of Patent: March 25, 2008
    Assignee: AOL LLC
    Inventor: Yair Goldfinger
  • Patent number: 7349351
    Abstract: A method for determining a master ring for an optical communications network having nodes arranged in a plurality of interconnected ring structures. (A master ring is a ring structure which contains every node in the network exactly once, and which also respects the node ordering of every individual ring.) An efficient solution to the master ring problem is provided by advantageously limiting the enumeration process based on the consistency of the enumeration of individual rings with each other. Illustratively, an intersection graph of the network is generated; one or more of the rings is chosen and possible openings of each of these rings are enumerated; and a limited number of possible openings of one or more other (i.e., non-chosen) rings are enumerated such that the enumeration of the possible openings of the other (i.e., non-chosen) rings are consistent therewith.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: March 25, 2008
    Assignee: Lucent Technologies Inc.
    Inventors: Hadas Shachnai, Yihao Lisa Zhang
  • Patent number: 7345993
    Abstract: Connections between communication nodes are established along a ring, with nodes at successive positions along the ring and two-way point to point communication connections between pairs of the nodes at successive positions along the ring. Data addressed to a node is split into parts that are transmitted to the node along opposite directions along the ring. Intermediate nodes forward the data. The nodes monitor the connections and other nodes to detect whether there is a failure of transmission along any direction and, if there is a failure along one of the directions, suppressing transmitting all of the data in a failing one of the directions.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: March 18, 2008
    Assignee: Lucent Technologies Inc.
    Inventor: Jan A. W. Venema
  • Patent number: 7330924
    Abstract: An aspect of the invention is physical layer interface for a network interface including a plurality of input/output pins. The input/output pins are coupled for being multiplexed into a physical layer interface selected from among a Reduced Gigabit Media Independent Interface and a Gigabit Media Independent Interface. The input/output pins internal to a programmable logic device are for access to and from a processor block located in the programmable logic device.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: February 12, 2008
    Assignee: Xilinx, Inc.
    Inventors: Ting Yun Kao, Robert Yin, Hamish T. Fallside, Richard P. Burnley, Nicholas McKay, Martin B. Rhodes, Stuart A. Nisbet, Gareth D. Edwards, Allan W. Fyfe
  • Publication number: 20080002729
    Abstract: Local add traffic exchange between separate East and West line cards in a Half-MAC architecture for Resilient Packet Ring networks is provided by a scheduler and a shared transit path between RPR MACs. By sharing the interconnecting bus that is used for the transit of traffic between the two RPR MACs, a path is provided for the local add traffic that needs to be redirected to the other RPR line card.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 3, 2008
    Inventor: Marcus Duelk
  • Patent number: 7298705
    Abstract: A network component for processing a packet can include a buffer configured to receive a packet, a forwarding unit configured to forward the packet received at the first buffer to a loopback port, and a transmitting unit configured to transmit the packet out of the loopback port. In addition, the network component can include a loopback unit configured to loop back the packet into the loopback port, a first identification unit configured to identify an egress port, and a second transmitting unit configured to transmit the packet looped back from the loopback port out of the egress port.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: November 20, 2007
    Assignee: Broadcom Corporation
    Inventors: Laxman Shankar, Shekhar Ambe
  • Publication number: 20070263646
    Abstract: A plug-in card for an optical transmission apparatus includes a J1 byte generating unit. The J1 byte generating unit sends information on on-use side J1 byte 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 byte generating unit receives information on on-use side J1 byte 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 byte generating unit matches spare side J1 byte data to the on-use side J1 byte data. The plug-in card also includes a B3 byte calculating unit that operates in a similar way as the J1 byte generating unit does in processing B3 byte data.
    Type: Application
    Filed: September 28, 2006
    Publication date: November 15, 2007
    Inventors: Hideki Matsui, Mitsuhiro Kawaguchi, Masahiro Shioda, Ryuji Kayama, Takashi Kaiga
  • Patent number: 7286471
    Abstract: System and method for dynamically altering bandwidth allocation to each region serviced by a network. Each region is allocated an initial estimated bandwidth on the network and compares instantaneous demand against the allocation. When demand falls below the allocation, the region releases bandwidth so other regions can take advantage of that bandwidth. When demand exceeds the allocation, the region takes advantage of bandwidth released by other regions.
    Type: Grant
    Filed: March 23, 2002
    Date of Patent: October 23, 2007
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Axel K. Kloth, Warner Andrews, Paul Bergantino, Jeremy Bicknell, Daniel Fu, Moshe De-Leon, Stephen M. Mills
  • Patent number: 7280550
    Abstract: In a ring topology digital network propagation delay is reduced A master node transmits a clock signal into the network in one direction. Each slave node propagates the signal to the next slave node without regeneration until the signal is received by the master node. The amount of time the signal takes to travel around the ring, is measured and is the total ring propagation delay. The master node then transmits a clock signal in both directions to the first slave node which measures the difference in their arrival times and transmits the difference to the master node. The process is repeated for each other slave node. Based upon each difference the master node computes the propagation delay for each ring segment. The master node transmits to each slave node the corresponding ring segment propagation delay and each slave node adjusts the phase of the node's clock.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: October 9, 2007
    Assignee: Cirrus Logic, Inc.
    Inventor: Gerrit Eimbertus Rosenboom
  • Patent number: 7280549
    Abstract: A data communication bus and method of operation thereof, including a plurality of nodes connected to a respective plurality of media segments. A typical node includes an output port coupled to a media segment that it exclusively controls. And an input port coupled to a media segment that is exclusively controlled by another node of the bus. Each media segment typically includes a plurality of high speed data channels such as electrical transmission lines.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: October 9, 2007
    Assignee: Micron Technology, Inc.
    Inventors: Zvi Regev, Alon Regev
  • Publication number: 20070230487
    Abstract: Frame-transfer functional units function as a switch for transferring a frame to a destination retrieved from an FDB. In transferring a frame to a ring selecting unit, the frame-transfer functional units transfers the frame with the frame added with a header in device. RPR functional units execute processing on an RPR frame received from the other communication device or a frame from the frame-transfer functional units with ring processing functional units based on an RPR protocol. The ring selecting unit searches a switch table based on information about the header in device added to the frame with the frame-transfer functional units and the RPR functional units to transfer the frame to a retrieved destination. The ring selecting unit can distribute a frame addressed to one port to plural ports.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 4, 2007
    Applicant: NEC CORPORATION
    Inventor: Hiroshi Tanaka
  • Patent number: 7274656
    Abstract: A failure protection between interconnected adjacent Resilient Packet Rings (RPRs) in a multiple RPR network is provided. Two paths, a regular message path and a protection path, are provided between two adjacent RPRs. The regular path is used for routing inter-ring messages when no failure has occurred on the path. Messages are rerouted through the protection path when a failure occurs on the regular path. Each of these paths has two RPR interface nodes (one for each RPR) that are connected to an interconnection device (a layer 2 bridge or a layer-3 router) through interconnection links. Procedures for detecting failures and generating notifications for message rerouting and fault reports are executed at the interconnection devices. The procedures use periodic keep alive messages for diagnosing network segment and interconnection device failures. The fault detection and message rerouting are accomplished in less than 50 ms.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: September 25, 2007
    Assignee: Tropic Networks Inc.
    Inventors: Byoung-Joon Lee, James Benson Bacque
  • Publication number: 20070217438
    Abstract: A ring node device includes a main Resilient Packet Ring (RPR) card and a queued RPR card. Upon detection of disconnection of a communication link between the main RPR card and an L2/L3 switch, the ring node device exercises control to switch from the main RPR card to the queued RPR card and carries out communication with the L2/L3 switch.
    Type: Application
    Filed: July 31, 2006
    Publication date: September 20, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Masanori Kondo, Toshihiro Ban, Takashi Fukagawa, Kazuhiro Minamimoto
  • Publication number: 20070165659
    Abstract: An information platform system, the configuration thereof is able to change flexibly to meet the needs of the customers, and able to use a single adapter for multiple uses, wherein multiple general-purpose processing modules and dedicated processing modules for processing disks and external networks are connected to one another with switching hubs via respective adapters, and the platform system includes a management module having a system identifier management table specifying system type of the general-purpose processing modules, a functional set management table managing a functional set to be included by the general-purpose processing module of each system identifier, and the configuration management table managing the combination of the general-purpose processing modules and dedicated processing modules, and the management module selects a functional set from multiple functional sets, installs the selected functional set into a general-purpose processing module and an adapter, and manages the system conf
    Type: Application
    Filed: January 5, 2007
    Publication date: July 19, 2007
    Inventors: Yoshiko Yasuda, Takashige Baba, Jun Okitsu, Toshiaki Tarui
  • Patent number: 7233570
    Abstract: An apparatus and method for extending digital data transmission link distances provide a mechanism in which data is transmitted over relatively long distances using a repeater to provide data buffering and handle the flow control. The repeater function incorporates large virtual lane receiver buffers in its long distance ports. Enough virtual lanes are implemented so that service level to virtual lane mapping is not required, allowing the repeaters to be made invisible to Subnet Management.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: June 19, 2007
    Assignee: International Business Machines Corporation
    Inventor: Thomas A. Gregg
  • Patent number: 7221674
    Abstract: A method for multicasting/broadcasting IP data in a mobile communication system, includes the steps of a packet data serving node (PDSN) receiving multicast packet data, transforming the multicast packet data to a PPP frame format having an identification header, transmitting multicast message to base station controller/packet control function (BSC/PCF), the BSC/PCF transmitting multicasting/broadcasting message to all or some of base stations under control of the BSC/PCF according to header information of the multicast message, and transmitting the multicasting/broadcasting message to mobile station through broadcasting channel.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: May 22, 2007
    Assignee: LG Electronics Inc.
    Inventor: Byung Keun Lim
  • Patent number: 7221677
    Abstract: A network or interconnect structure which includes a plurality of nodes which are interconnected within a hierarchical multiple level structure. The level of each node is determined by the position of the node within the structure and data messages move from node to node from a source level to a destination level. Each node within the interconnect structure is capable of receiving simultaneous data messages at its input ports from any other node and the receiving node is able to transmit each of the received data messages through its output ports to separate nodes in the interconnect structure to one or more levels below the level of the receiving node.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: May 22, 2007
    Assignee: Interactic Holdings, LLC
    Inventors: Coke Reed, John Hesse
  • Patent number: 7219124
    Abstract: The present invention provides for provisioning broadband services using a VDSL-based communication network. The present invention includes a system architecture and method for automatically activating VDSL service by self-discovering customer premises equipment, such as a residential gateway, by determining the loop associated with a user and the subscribed content to be delivered to the user.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: May 15, 2007
    Assignee: Qwest Communications International Inc.
    Inventors: Richard Cerami, Timothy Figueroa, Roxanna Storaasli
  • Patent number: 7209975
    Abstract: Methods, software products, and systems establish a connection between a source network element and a destination network element in a communication network comprising a plurality of first network elements. The first network elements are partitioned into at least two areas wherein a shared network element is shared between the at least two areas. A working path is then generated between the source network element and the destination network element through the shared network element. A first backup sub-path is then generated within a first one of the at least two areas between the source network element and the shared network element. A second backup sub-path is generated within a second one of the at least two areas between the shared network element and the destination network element.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: April 24, 2007
    Assignee: Sprint Communications Company L.P.
    Inventors: Hui Zang, Canhui Ou
  • Patent number: 7209436
    Abstract: A method and apparatus for variable rate pipes is described. In one embodiment of the invention, a computer implemented method comprises allocating a pipe from part of a working channel and at least part of a protecting channel of a span of a bi-directional line switched ring (BLSR), the pipe having a bandwidth, transmitting a set of layer 2/3 traffic in the pipe, and reducing the pipe's bandwidth when a failure occurs in the ring.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: April 24, 2007
    Assignee: Redback Networks Inc.
    Inventors: Siegfried Luft, Gerald Neufeld, David Stiles
  • Patent number: 7167648
    Abstract: An Ethernet Optical Area Network (EOAN) system, and methods for implementing and using such an EOAN system, are disclosed. The EOAN system may be used to improve the speed and reliability of data communications networks for small to medium-sized companies in metropolitan area networks. The EOAN system provides end-to-end Ethernet protocol, enabling professionals to have high-speed data communications in real time. The EOAN system may be generally utilized for improving data communications between branch offices, home offices, campuses, and remote sites for a wide variety of industries. The present invention preferably includes a fiber optic ring, Network Operation Center (NOC), NOC architecture components, existing client equipment, and one or more Free Space Optic (FSO) devices, microwave communication technology, and/or data switching platforms to implement high-speed Ethernet-based connections such as within a specified metropolitan area.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: January 23, 2007
    Assignee: Innovative Fiber Optic Solutions, LLC
    Inventors: Patrick Heinz, Christopher Scheper, David Leary
  • Patent number: 7161944
    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: May 31, 2000
    Date of Patent: January 9, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: David A. Hillard, Anix Anbiah
  • Patent number: 7158540
    Abstract: A ring network element and the ring network architectures it enables. According to one embodiment of the invention, a single network element includes a full TDM cross-connect and a multiple ring unit. The full TDM cross-connect is coupled to every line card slot in the single network element with the same amount of bandwidth connection. In addition, the full TDM cross-connect is programmable on an STS-1 basis. The multiple ring unit allows for the simultaneous support of multiple TDM rings.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: January 2, 2007
    Assignee: Redback Networks, Inc.
    Inventors: David R. Stiles, Siegfried Luft, Lawrence Ong, James C. Pang
  • Patent number: 7142504
    Abstract: A system and apparatus for transmitting transit data through a network with first and a second rings coupling two or more nodes. In one aspect, when the first ring is intact and the second ring has a fault between two nodes, transit data may be wrapped from a second, faulted ring to a first, intact ring at an upstream node adjacent to a fault, and transit data may be maintained on the first, intact ring between the upstream node and a downstream node adjacent to the fault. In another aspect, when the system has a fault between any two nodes, the system may preserve host data.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: November 28, 2006
    Assignee: Cisco Technology, Inc.
    Inventor: Necdet Uzun