Centralized Switching Patents (Class 370/422)
  • Patent number: 8443066
    Abstract: A networked computing system is taught that may be operated as one or more provisioned servers, each of the provisioned servers including capabilities as identified by a corresponding set of specifications and attributes, according to various embodiments. Typically the specifications (or constraints) and attributes are specified with a Server Configuration File. The networked computing system may be provisioned into any combination and number of servers according to needed processing and I/O capabilities. Each of these servers may include distinct compute, storage, and networking performance. Provisioned servers may be managed similar to conventional servers, including operations such as boot and shutting down.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: May 14, 2013
    Assignee: Oracle International Corporation
    Inventors: Nakul Pratap Saraiya, Curtis M. Collins, Yuri Finkelstein, Thomas Dean Lovett, Shyam Mittur, Cosmos Nicolaou, Shreyas B. Shah, Fabio Onofrio Ingrao
  • Patent number: 8442064
    Abstract: Access switches in a switching system may use virtual aggregated links. When a link between an aggregation switch and an access switch fails, the link failure may be reflected in the virtual aggregated link and data traffic to another access switch may be switched away from the failed switch. A forwarding table in the access switch stores a number of entries that each define a correspondence between destination addresses and an output identifier for the switch. At least a first output identifier includes an aggregated link that represents a first set of possible output links. At least a second output identifier includes a virtual aggregated link, associated with a second network switch that represents a second set of possible output links. Destination addresses in the forwarding table for the virtual aggregated link correspond to network devices connected to the second network switch.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: May 14, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Ankur Singla, Harshad Nakil, Rajashekar Reddy, Hampapur Nagaraj Ajay
  • Patent number: 8442040
    Abstract: The present invention provides a system, apparatus and method for modularly adapting a network node architecture to function in one of a plurality of potential node types. The architecture includes a configurable switching element, integrated optics, and a plurality of modules that allow a “type” of node to be adapted and configured within the base architecture. The module interfaces may be optical or electrical and be used to construct various different types of nodes including regenerators, add/drop nodes, terminal nodes, and multi-way nodes using the same base architecture.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: May 14, 2013
    Assignee: Infinera Corporation
    Inventors: Drew D. Perkins, Ting-Kuang Chiang, Marco E. Sosa, Mark Yin, Edward E. Sprague
  • Patent number: 8432927
    Abstract: A fixed-size data packet switch comprising: 1) N input ports for receiving incoming fixed-size data packets at a first data rate and outputting the fixed-size data packets at the first data rate; 2) N output ports for receiving fixed-size data packets at the first data rate and outputting the fixed-size data packets at the first data rate; and 3) a switch fabric interconnecting the N input ports and the N output ports.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: April 30, 2013
    Assignee: STMicroelectronics Ltd.
    Inventor: Ge Nong
  • Patent number: 8422508
    Abstract: A switching node comprises edge nodes interconnected by independent switch units. The switch units are arranged in at least one switch plane and the switch units of each switch plane are arranged in a matrix having several rows and several columns. Each edge node has a channel to a switch unit in each column in each switch plane and a channel from each switch unit in a selected column in each switch plane. Simple paths, each traversing only one switch unit in a switch plane, may be established for any directed edge-node pair. Additionally, several non-intersecting compound paths, each comprising at most two simple paths, may be established for any edge-node pair. A significant proportion of traffic may be routed through simple paths. The switching node employs distributed control scheme and scales gracefully from a capacity of a fraction of a terabit per second to thousands of terabits per second.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: April 16, 2013
    Inventor: Maged E Beshai
  • Patent number: 8406759
    Abstract: A networked computing system, including multiple radio access nodes (RANs), multiple radio communications controllers (RCCs), and a data communications network facilitating communications amongst the RANs and the RCCs of the system. A regional RAN receives a default eMIB associated with a first type of RAN (e.g., a macrocell, microcell, picocells, or femtocell RAN types) from a RCC, in response to a registration event of a RAN initialization process. The regional RAN maintains a dynamic eMIB comprising network operating parameters determined by various self-optimization processes. The network operating parameters of the dynamic eMIB are selected to fall within a range designated by the default eMIB. During a network failure condition, the regional RAN is configured to use a temporary eMIB comprising failure level operating parameters in order to mitigate network deficiencies caused by the network failure condition.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: March 26, 2013
    Assignee: Eden Rock Communications, LLC
    Inventors: David J Ryan, David B Gibbons
  • Patent number: 8331377
    Abstract: Embodiments disclosed here relate to scheduling packet transmission in a multi-carrier communication system. In an embodiment, a master scheduler having at least one processor and at least one memory operably connected to the at least one processor is adapted to execute instructions stored in the at least one memory, the instructions comprising selecting a packet with a highest packet metric from among candidate packets from one carrier of a plurality of carriers, whereby expedited forwarding flows do not have a higher metric on another carrier.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: December 11, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Rashid A. Attar, Peter J. Black, Mehmet Gurelli, Mehmet Yavuz, Naga Bhushan
  • Patent number: 8331357
    Abstract: Apparatus for placing a plurality of computer-assisted compressed-voice subscriber calls using a circuit-switched signal path in a distributed telecommunications network. A plurality of vocoders receive voice data from respective subscriber voice devices and output substantially continuous compressed-voice data signals which are arranged by a plurality of packetizers into compressed-voice data packets. A plurality of network adapters send the compressed-voice data packets to a circuit-switched telephone network. A plurality of sequencers remove the substantially continuous compressed-voice data signals from the compressed-voice data packets. A multiplexer coupled to the sequencers combines the compressed-voice data signals into a compressed-voice data package and a signal injector injects the compressed-voice data package into a prearranged time slot of a conventional circuit-switched signal path.
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: December 11, 2012
    Assignee: Alcatel Lucent
    Inventor: Yangling Zhang
  • Patent number: 8320370
    Abstract: The present invention is related to a method for routing data packets in a routing device connecting a first network and a second network, and to a corresponding routing device. The method comprises the steps of receiving a frame from a device connected to the first network; forwarding the frame to an internal bridge module of the device; checking whether the frame contains a multicast group management message and in the affirmative, creating a new frame comprising as destination address the destination address of an internal multicast group management module and as payload at least the multicast management data of the received frame; and forwarding this new frame to the internal bridge function.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: November 27, 2012
    Assignee: Thomson Licensing
    Inventors: Sylvain Dumet, Jan Voet
  • Patent number: 8306047
    Abstract: A packet switch architecture that can switch optical packets at high throughputs without using any random access memory, without fragmenting variable length packets into fixed length fragments and reassembling them, and without converting the optical packets into electronic packets. Programmable delay lines are use which delay the output of each packet for a programmable amount which may be re-programmed while the packet is being delayed by the programmable delay line. Programmable delay line controllers manages the delays imposed by the programmable delay lines so as to have a look-ahead phase during which information about the packets is gathered and a shift phase during which the sequence of packets is shifted to match an output sequence.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: November 6, 2012
    Assignee: University of Southern California
    Inventors: Joseph D. Touch, Joseph Bannister, Stephen Suryaputra
  • Patent number: 8295802
    Abstract: A communication control apparatus includes a database which stores identification information of a party on the other end of communication with whom communication should be controlled, a search circuit which acquires communication data for requesting a connection to a party on the other end of communication and searches the database for the identification information of the party on the other end of communication, and a control unit which, if the identification information of the party on the other end of communication is found in the database, transmits a connection termination request to a terminal of the transmission source, and further transmits a connection request thereto so as to establish, in place of the party on the other end of communication, a connection with the terminal of the transmission source of the communication data and controls communication between the transmission source and the party on the other end of communication.
    Type: Grant
    Filed: July 4, 2006
    Date of Patent: October 23, 2012
    Assignee: Duaxes Corporation
    Inventor: Mitsugu Nagoya
  • Patent number: 8295293
    Abstract: A packet switch issues credits to a link partner based on credit values and updates the credit values to indicate credits consumed by the link partner based on packets received from the link partner by the ingress port. Additionally, the packet switch selects credit threshold values corresponding to a transmission period of imminent credit starvation of the link partner and compares the updated credit values with the credit threshold values. The packet switch issues additional credits to the link partner when at least one of the updated credit values has reached a corresponding credit threshold value. In some embodiments, the packet switch also issues additional credits to the link partner during idle transmission periods.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: October 23, 2012
    Assignee: Integrated Device Technology, Inc.
    Inventor: David Alan Brown
  • Patent number: 8274972
    Abstract: A communication system is provided, including a first master device to operate as a master of a communication according to a first protocol, a second master device to operate as a master of a communication according to a second protocol, a common slave device to operate as a slave of the communication according to the first protocol and the second protocol with respect to the first master device and the second master device, and a switch to control a connection between the common slave device and the first master device and between the common slave device and the second master device for a communication between the common slave device and one of the first master device to and the second master device. Thus, embodiments of the present invention provide a communication system that minimizes cost increases and improves communication speed in a system in which a plurality of master devices communicate with a slave device performing the same function as the master devices.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: September 25, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jeong-kee Park
  • Patent number: 8270398
    Abstract: A plurality of systems for routing signals are described. The system includes a cross point switch that can couple any one of a plurality of input terminals to a plurality of output processor terminals. Signals received at the input terminals are coupled to corresponding output terminals and are processed by output modules. The resulting processed signals are provided at output terminals. In some embodiments, one or more input modules are provided to process input signal prior to routing through the cross-point switch.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: September 18, 2012
    Assignee: Evertz Microsystems Ltd.
    Inventors: Romolo Magarelli, Rakesh Thakor Patel, Eric Fankhauser, Daniel G. Turow
  • Patent number: 8243628
    Abstract: A system and method for establishing a price for communicating over a communications network may include initiating a bandwidth occupancy query message to at least one network node along a traffic path to which a user is communicating. A highest bandwidth occupancy of the network nodes along the traffic path may be determined. A current price may be computed for a user communicating over the traffic path based on the highest bandwidth occupancy. The user may be notified of the current price for communicating over the traffic path, thereby enabling the user to adjust network usage.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: August 14, 2012
    Assignee: Embarq Holdings Company, LLC
    Inventors: Jade Kerr, Clinton Smoyer, Andrew Cook, Michael Morrissey, Mohit Mathur
  • Patent number: 8233381
    Abstract: A voice over internet protocol telephone system is described in which services for handling calls invoking account codes are distributed to voicemail servers in the system. If the voicemail server associated with a particular user does not have services for handling account code calls, then the request is forwarded to another voicemail server in accordance with a predefined procedure.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: July 31, 2012
    Assignee: Shoretel, Inc.
    Inventors: Mamata Kondapally, Scott A. Van Gundy
  • Patent number: 8228872
    Abstract: A device, system and method for performing zone switch based handover in a legacy serving base station by an advanced mobile station (AMS), the method including receiving a ranging response (RNG-RSP) message including a zone switching TLV parameter necessary to perform zone switching to an advanced mobile station support zone (MZone) from a legacy zone (LZone) of a target advanced base station (ABS), and requesting a bandwidth for transmitting an advanced air interface ranging request (AAI_RNG-REQ) message to the MZone using the zone switching TLV parameter.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: July 24, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Uk Jung, Yong Ho Kim, Ki Seon Ryu, Jeong Ki Kim
  • Patent number: 8223760
    Abstract: Systems and methods include providing a router that may be deployed as multiple logical routers that share a common fast interconnect. These logical routers may functionally serve as core routers, peering routers, aggregation routers, etc. A further aspect of the system and methods is that the resources assigned to a logical router are allocated from a pool potentially including multitude of hardware cards. A further aspect of the system and methods is that a logical router may be independently managed by the owner of the router or by an owner of the logical router.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: July 17, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: David D. Ward, George Suwala, Natarajan Shankar, John G. Scudder, Andrew Lunstad
  • Patent number: 8213305
    Abstract: A system, apparatus, method and article to perform dynamic service management for multicore processors are described. The apparatus may include, for example, a processing device having multiple types of processors to process packets. A service manager may dynamically assign executable files for multiple services to the multiple types of processors during execution of the executable files based on packets processed for each service. Other embodiments are described and claimed.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: July 3, 2012
    Assignee: Intel Corporation
    Inventors: Arun Raghunath, Erik J. Johnson
  • Publication number: 20120147898
    Abstract: A network controller for managing several managed switching elements that forward data in a network that includes the managed switching elements. The network controller is further for creating a logical switching element to be implemented in a set of managed switching elements. The network controller includes a set of modules for receiving input data specifying a logical switching element and for creating, based on the received input data, a set of logical switch constructs for the logical switching element by performing a set of database join operations. At least one of the logical switch constructs is for facilitating non-forwarding behavior of the logical switching element.
    Type: Application
    Filed: October 7, 2011
    Publication date: June 14, 2012
    Inventors: Teemu Koponen, Pankaj Thakkar, Bryan J. Fulton
  • Patent number: 8194697
    Abstract: A selective connection device allowing the connection of at least one peripheral to a target computer and a selective control system comprising such a device. It relates to the field of devices for the selective connection of a control device composed of input/output peripherals to various target computers. The selective connection device affords security guarantees by preventing communication between the various target computers that may be controlled.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: June 5, 2012
    Assignee: Sagem Defense Securite
    Inventors: François Guillot, Jean-Marie Courteille
  • Patent number: 8194684
    Abstract: A network apparatus for a wide area network (WAN) includes a plurality of ports through which a local area network (LAN) and the WAN are connected; an active-port selecting unit that selects an active port from among the ports, and identifies a port other than the active port as a standby port; and a notifying unit that notifies an interface device for the LAN via the standby port that a line connected to the standby port is in a standby mode.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 5, 2012
    Assignee: Fujitsu Limited
    Inventor: Kumiko Uematsu
  • Patent number: 8144690
    Abstract: A method that provides for multicast delivery of information in a DSL network includes creating transmission paths between a single source port and multiple destination ports in a DSL network; receiving information at the source port; determining which of the destination ports is to receive the information; and distributing the information from the source port to selective ones of the destination ports based on the prior referencing step. A DSL system for providing multicast delivery of information includes an ATM network layer for sending information, a digital subscriber line access multiplexer (DSLAM) coupled to the ATM network layer for receiving the information, and a network control system for controlling selective multiplexing of the information through the digital subscriber line access multiplexer (DSLAM).
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: March 27, 2012
    Assignee: Thomson Licensing S.A.
    Inventors: John William Richardson, Kumar Ramaswamy
  • Patent number: 8135021
    Abstract: A method of transmitting data in a communication system from a first node to destination node comprising transmitting the data from the first node to an intermediate node; determining if the intermediate node communicated with the destination node more recently than the first node that transmitted the data to the intermediate node communicated with the destination node; forwarding the data from the intermediate node to a further node if the intermediate node communicated with the destination node more recently than the first node that transmitted the data to the intermediate node communicated with the destination node.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: March 13, 2012
    Assignee: Nokia Corporation
    Inventor: Cedric Westphal
  • Patent number: 8130779
    Abstract: A switch device includes two cascade ports each connected to another switch device; at least one direct port connected to a storage medium; a hop-count determining unit that determines whether a frame input from one cascade port has already gone through a predetermined number of switch devices; an output unit that outputs the frame from another cascade port when it is determined that the frame has not gone through the predetermined number of switch devices; and a port determining unit that determines a direct port for outputting the frame when it is determined that the frame has already gone through the predetermined number of switch devices.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: March 6, 2012
    Assignee: Fujitsu Limited
    Inventor: Katsuya Niigata
  • Patent number: 8116315
    Abstract: The present invention provides method for data packet processing in a telecommunications system. The method of the present invention can include the steps of (i) determining a set of classification parameters for a data packet at an ingress edge unit, wherein the classification parameters include a packet destination, (ii) communicating the data packet to an egress edge unit and (iii) routing the data packet to a destination egress port at the egress edge unit according the classification parameters determined at the ingress edge unit. In one embodiment of the present invention, the classification parameters can include a destination egress edge unit, a destination egress port at the destination egress edge unit, and quality of service parameter for proper processing of the data packet.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: February 14, 2012
    Assignee: YT Networks Capital, LLC
    Inventor: Nolan J. Posey, Jr.
  • Patent number: 8081646
    Abstract: A packet switch includes virtual output queues for mapping data units of data packets from input ports to output ports of the packet switch. The packet switch selects virtual output queues based on old age indicators of the virtual output queues and routes data units mapped at heads of the selected virtual output queues to output ports of the packet switch. Further, the packet switch may identify a data unit of a multicast data packet mapped at the head of more than one virtual output queue and contemporaneously route the data unit to more than one output port. Additionally, the packet switch may update an old age indicator to indicate a virtual output queue is old if the virtual output queue maps an unserviceable data unit of a multicast data packet and the same data unit is mapped at the head of a selected virtual output queue.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: December 20, 2011
    Assignee: Integrated Device Technology, inc.
    Inventors: Robert Henry Bishop, Angus David Starr MacAdam
  • Patent number: 8005105
    Abstract: A fiber channel switch element for routing fiber channel frame is provided. The switch element includes a fiber channel port that can be configured to support plural data transfer rates. The data transfer rate may be 1 G, 2 G, 4 G, 8 G or 10 G. The switch element includes a clock configuration module for providing a clock signal that is based on the data transfer rate. A receive segment of the fiber channel port sends a signal to a transmit segment to avoid an under flow condition. The receive segment also waits for a certain frame length after a fiber channel frame is written and before the fiber channel frame is read, depending upon a data transfer rate of a source port. Multiple lanes may be configured as a single 10 G multi lane port or as multiple individual ports.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: August 23, 2011
    Assignee: QLOGIC, Corporation
    Inventors: Frank R. Dropps, Gary M. Papenfuss, Ernest G. Kohlwey
  • Patent number: 8005081
    Abstract: An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: August 23, 2011
    Assignee: Nortel Networks Limited
    Inventors: Nigel Bragg, David Allan, Simon Parry, Robert Friskney, Simon Brueckheimer
  • Patent number: 7995570
    Abstract: In a device, a method and a system for communication between a control module that can be associated with a local console of a medical modality, an examination module that can be associated with the medical modality, and an administration module that can be associated with an administration entity remote from the medical modality, respective communication units that can be connected among one another are associated with each of the modules and the signals transferred from a respective communication unit are transferred to the communication unit of at least one other module; and the communication unit of the administration module of the remote administration entity can access data of the medical modality.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: August 9, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Sebastian Schmidt, Sabine Schaeffer-Kundler
  • Patent number: 7990956
    Abstract: A voice communication system configured over an IP phone system, with which users could establish voice calls between analog telephone devices and IP phones through an IP phone system without changing their conventional usage method is provided. To allow analog telephone devices to be able to login to the IP phone system, the communication mediation device is required to replace an analog telephone device by be an IP phone user in the IP phone system, and to process voice communications by using analog-digital signal conversion. Using the pre-established registration information, thus allowing the IP phone upon only determining the destination telephone number, it is then capable of automatic converting the telephone number to the corresponding IP phone account so as to proceed with a call through the IP phone system.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 2, 2011
    Inventor: Shyh-Luh Huang
  • Patent number: 7986707
    Abstract: A method for executing services over an enterprise service bus includes analyzing a message of a first service to a second service to determine a nature of a digital media object sent from the first service to the second service, analyzing one or more media rules to determine whether one or more intermediary services are to be performed based on the nature of the digital media object, and when it is determined that one or more intermediary services are to be performed, executing, after the first service and before the second service, the one or more intermediary services.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: July 26, 2011
    Assignee: International Business Machines Corporation
    Inventors: Paolo Dettori, Julio Nogima, Frank A. Schaffa, Diego Sanchez Gallo
  • Patent number: 7979552
    Abstract: A system is taught in which a module having processing elements can access network and storage interfaces that are external to the module of the processing elements as though those interfaces were located internal to the module of the processing elements. The system may be operated as one or more provisioned servers, each of the provisioned servers including capabilities as identified by a corresponding set of specifications and attributes, according to various embodiments. Typically the specifications (or constraints) and attributes are specified with a Server Configuration File. An Enterprise Server system may be provisioned into any combination and number of servers according to needed processing and I/O capabilities. Each of these servers may include distinct compute, storage, and networking performance. Provisioned servers may be managed similar to conventional servers, including operations such as boot and shutting down.
    Type: Grant
    Filed: March 21, 2010
    Date of Patent: July 12, 2011
    Assignee: Habanero Holdings, Inc.
    Inventors: Nakul Pratap Saraiya, Curtis M. Collins, Yuri Finkelstein, Thomas Dean Lovett, Shyam Mittur, Cosmos Nicolaou, Shreyas B. Shah, Fabio Onofrio Ingrao
  • Patent number: 7974275
    Abstract: Methods for aging datagrams in the memory portion of a datagram distribution device or other network device are provided. According to some of these methods, an attribute of each datagram entering the device may be used to assign an initial aging counter value to each datagram. Then, the attribute-specific aging counter values may be used to extend the time until expiration of certain datagrams relative to other datagrams. Also, devices for implementing these methods are provided.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: July 5, 2011
    Assignee: Broadcom Corporation
    Inventor: Chien-Hsien Wu
  • Patent number: 7961653
    Abstract: A home gateway is an apparatus that transmits information, which is received from an intercom slave unit, to a plurality of appliances each having a communication function. The home gateway includes a demultiplexing circuit, a wireless communication circuit, a memory, a video codec circuit, and a CPU. The demultiplexing circuit receives information from the intercom slave unit. The wireless communication circuit communicates with the plurality of appliances. The memory stores profiles and levels. The video codec circuit converts image information received from the intercom slave unit according to a profile and a level. The CPU controls the wireless communication circuit and the video codec circuit. Thereby, various data can be transmitted regardless of structures and performance capabilities of the appliances.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: June 14, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Akira Yamamoto
  • Patent number: 7948877
    Abstract: Systems and methods for packet forward control. The system comprises a plurality of ports and a processing module configured to receive a packet. The processing module comprises a resource management module and a forward control module. The resource management module detects whether congestion occurs on at least one specific port among the ports. The forward control module determines whether the specific port comprises a predetermined port within the ports, and if so, forwards the packet to at least one of the ports excepting the predetermined port.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: May 24, 2011
    Assignee: Via Technologies, Inc.
    Inventors: Wei-Pin Chen, Hung-Chi Huang, Ming-Chao Chung, Chun-Cheng Wang
  • Publication number: 20110110382
    Abstract: PortChannel groups are disclosed which include multiple PortChannel links of a PortChannel. Further, the selection of a particular PortChannel group, and possibly a PortChannel link within a selected PortChannel group, for a packet is provided by user-programmable matching of programmed values or rules to data extracted from the packet. In this manner, the forwarding of packets over PortChannel groups can be explicit. Moreover, packets of different flows of a packet session can be caused to be forwarded over a same PortChannel group, possibly leading to a service node for performing one or more applications based on the packets of the flow(s) of a packet session.
    Type: Application
    Filed: December 23, 2009
    Publication date: May 12, 2011
    Applicant: Cisco Technology, Inc., a corporation of California
    Inventors: Khalil A. Jabr, Sudhakar Shenoy, Dileep K. Devireddy
  • Publication number: 20110103396
    Abstract: A method, system, and computer usable program product for selective link aggregation in a virtualized data processing environment are provided in the illustrative embodiments. A data packet is received at a switch. An identifier associated with the data packet is determined. The identifier corresponds to a logical partition in a logical partitioned data processing system. A lookup is performed in a data structure to determine a set of ports associated with the identifier. The set of ports is retrieved from the data structure. A port is selected from the set of ports and the data packet is transmitted from the port to the logical partition.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Applicant: International Business Machines Corporation
    Inventors: Omar Cardona, James B. Cunningham, Baltazar De Leon, III, Jorge R. Nogueras
  • Patent number: 7898966
    Abstract: A router detects a network attack and forwards traffic associated with the network attack to a discard interface. The router applies one or more filters to calculate traffic flow statistics for the traffic forwarded to the discard interface. The router may exchange routing communications with one or more other routers to alert the routers of the network attack. For example, the router may generate a routing communication in accordance with a routing protocol that advertises a route to the targeted device, and includes a policy tag that indicates the existence of a network attack. The other routers update forwarding information in accordance with the advertised route, and automatically forward traffic to respective discard interfaces based on the policy tag, thereby diffusing the network attack.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 1, 2011
    Assignee: Juniper Networks, Inc.
    Inventor: Jeffrey Yi Dar Lo
  • Publication number: 20110032825
    Abstract: A network switch device receives a communication packet having a source MAC address s and a destination MAC address d at a switch port p. Then, the network switch device determines whether a valid routing table entry (s, p) exists, there by indicating that the source MAC address s is reachable via a switch port p. The network switch device further determines for the destination MAC address d whether there is at least one switch port q for which a valid routing table entry (d, q) exists, there by indicating that d is reachable via a switch port q. When the routing table entries (s, p) and (d, q) exist, the network switch device routes the communication packet to the switch port q.
    Type: Application
    Filed: August 7, 2009
    Publication date: February 10, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cyriel Minkenberg, Mircea R. Gusat
  • Publication number: 20110026540
    Abstract: A switching network for efficiently receiving and transmitting data packets having both frames and messages includes a crossbar switch with a plurality of surrounding ports for exclusively switching frames which normally consist of large data streams of 40 to 60 bytes. Then the ports are connected together in a message ring and small data entity messages, for example 4, 8, or 12 bytes, are switched from an input port to an output port around the ring avoiding congestion of the crossbar switch.
    Type: Application
    Filed: July 6, 2010
    Publication date: February 3, 2011
    Inventors: Shaun Clem, Jimmy Pu, Darrin Patek, Todd Khacherian, Chris Reed
  • Publication number: 20110026541
    Abstract: A switching node comprises edge nodes interconnected by independent switch units. The switch units are arranged in at least one switch plane and the switch units of each switch plane are arranged in a matrix having several rows and several columns. Each edge node has a channel to a switch unit in each column in each switch plane and a channel from each switch unit in a selected column in each switch plane. Simple paths, each traversing only one switch unit in a switch plane, may be established for any directed edge-node pair. Additionally, several non-intersecting compound paths, each comprising at most two simple paths, may be established for any edge-node pair. A significant proportion of traffic may be routed through simple paths. The switching node employs distributed control scheme and scales gracefully from a capacity of a fraction of a terabit per second to thousands of terabits per second.
    Type: Application
    Filed: October 14, 2010
    Publication date: February 3, 2011
    Inventor: Maged E. Beshai
  • Patent number: 7881325
    Abstract: A technique is disclosed for managing load balancing operations in a storage area network. A frame is received at a switch in the fibre channel fabric. According to a specific implementation, the frame includes header information including a source device identity and a destination device identity. Zone and/or flow information relating to the identity of the zone/flow which is associated with the frame is identified. Using the identified information, a load balancing mechanism to be used for handling the frame is selected. According to a specific implementation, the selection of the load balancing mechanism is based at least in part upon the identity of the zone and/or flow which is associated with the frame.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: February 1, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Madhava Rao Cheethirala, Raja Rao Tadimeti
  • Patent number: 7877505
    Abstract: A method for communication includes associating respective feature chains with a plurality of interfaces of a data switch. The feature chains include service features. A respective failure policy is defined for each of one or more of the service features in each of the feature chains. Upon detecting a failure in a service feature in a feature chain associated with one of the interfaces, data packets are routed through the data switch while applying, responsively to the failure, the respective failure policy to the one of the interfaces.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: January 25, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Doron Oz, Sarel Altshuler, Simon Chatterjee
  • Patent number: 7864743
    Abstract: Methods and apparatus are presented for implementing a uniform platform for data/voice service, in which a base station controller and a Multi-BSSFast Packet Server are integrated into one rack, and a base station controller is connected to the Multi-BSSFast Packet Server via a link based on E1 over Ethernet (E1oE).
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: January 4, 2011
    Assignee: Alcatel Lucent
    Inventors: Bin He, Songhai Wang, Xiaowen Zhang, Enyuan Qian
  • Patent number: 7860097
    Abstract: Virtual Network Interface Controllers (vNICs) provide for communication among modules of Enterprise Server (ES) embodiments via a switch fabric dataplane. Processes executing on compute complexes of the servers exchange data as packets or messages by interfaces made available through vNICs. The vNICs further provide for transparent communication with network and storage interfaces. vNIC provisioning capabilities include programmable bandwidth, priority scheme selection, and detailed priority control (such as round-robin weights). In some embodiments, vNICs are implemented in Virtual Input/Output Controllers (VIOCs). In another aspect, Virtual Local Area Networks (VLANs) enable access to layer-2 and selected layer-3 network functions while exchanging the packets and messages. VLAN identification is provided in each vNIC, and VLAN processing is partially performed in VIOCs implementing vNICs.
    Type: Grant
    Filed: February 12, 2005
    Date of Patent: December 28, 2010
    Assignee: Habanero Holdings, Inc.
    Inventors: Thomas Dean Lovett, Sharad Mehrotra, Cosmos Nicolaou, Nakul Pratap Saraiya, Shreyas B. Shah, Myron H. White, Rajesh K. Jagannathan, Mangesh Shingane
  • Patent number: 7856026
    Abstract: Modules and methods are described for buffering packets to be switched in a system, such as a programmed device. The modules can be configured for different packet lengths, protocols, applications, and/or designs in a larger system. Techniques and mechanisms are further described for implementing a central memory and a linked-list addressing scheme. Accordingly, memory blocks of the central memory can be used for variable length packets and further reused at substantially the same time as they become available, thereby improving packet switching efficiency and/or flexibility.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 21, 2010
    Assignee: Altera Corporation
    Inventors: Christopher D. Finan, Ziad Abu-Lebdeh
  • Patent number: 7839868
    Abstract: A communication method for transmitting Ethernet messages in a distributed real-time system in which a plurality of network node computers, e.g. four network node computers (111, 112, 113, 114), each comprising at least one communication controller (121, 122, 123, 124), are linked via a communication system comprising one or more communication channels (109), one or more intelligent star couplers (101, 102) being disposed in each communication channel. According to the invention, a distinction is made between conventional Ethernet messages (ET messages) and time-triggered Ethernet messages (TT messages), the TT messages being transported with an a priori known constant delay time (?) between transmitter and receiver, and, when there is a time conflict between ET and TT messages, the transport of the ET message that is in conflict being delayed or aborted in order to be able to transport the TT message with the constant delay time (?).
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: November 23, 2010
    Assignee: FTS Computer Technik GmbH
    Inventor: Hermann Kopetz
  • Patent number: 7831147
    Abstract: This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: November 9, 2010
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Charles D. Combs, Thomas Edward Darcie, Bhavesh N. Desai, Alan H. Gnauck, Xiaolin Lu, Esteban Sandino, Oleh J. Sniezko, Anthony G. Werner, Sheryl Leigh Woodward
  • Patent number: 7826355
    Abstract: Setting up a group of virtual circuits using a single set up message request. In an embodiment, fewer than all of the virtual circuits in the group are immediately provisioned, and the remaining virtual circuits are placed in an inactive status by appropriate configuration of all the devices in the path of the group of virtual circuits. Each of the inactive virtual circuits can be activated (complete provisioning) as and when required. The bandwidth overhead on the networks is reduced as fewer signaling messages would be used in provisioning several virtual circuits. The parsing overhead is reduced on the devices processing the signaling messages as a result.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 2, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Amit S Phadnis, Pankaj Vyas, Balaji Lakshmikanth Bangolae