Patents Examined by Matthew Campbell
  • Patent number: 8605723
    Abstract: A method and apparatus for providing point-to-multipoint label switch paths (LSPs) in a Multi-Protocol Label Switching (MPLS) network is described. In one embodiment, a point-to-multipoint LSP is built in a MPLS network by using Resource Reservation Protocol Traffic Engineering (RSVP-TE) to signal the point-to-multipoint LSP as separate point-to-point LSPs and to merge the separate point-to-point LSPs into the point-to-multipoint LSP.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: December 10, 2013
    Assignee: Ericsson AB
    Inventors: Rahul Aggarwal, George Apostolopoulos, Liming Wei
  • Patent number: 8599740
    Abstract: A method is provided for communication in a wireless telecommunications system. The method comprises an access node performing a coordinated multi-point (CoMP) transmission with a relay node toward a user equipment, wherein the access node provides CoMP control information via at least one of a relay physical downlink control channel and a relay physical downlink shared channel.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: December 3, 2013
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Yi Yu
  • Patent number: 8599849
    Abstract: A method and apparatus for providing point-to-multipoint label switch paths (LSPs) in a Multi-Protocol Label Switching (MPLS) network is described. In one embodiment, a point-to-multipoint LSP is built in a MPLS network by using Resource Reservation Protocol Traffic Engineering (RSVP-TE) to signal the point-to-multipoint LSP as separate point-to-point LSPs and to merge the separate point-to-point LSPs into the point-to-multipoint LSP.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: December 3, 2013
    Assignee: Ericsson AB
    Inventors: Rahul Aggarwal, George Apostolopoulos, Liming Wei
  • Patent number: 8570988
    Abstract: Techniques are described to calibrate the downlink and uplink channels to account for differences in the frequency responses of the transmit and receive chains at an access point and a user terminal. In one method, pilots are transmitted on the downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Correction factors for the access point and correction factors for the user terminal are determined based on (e.g., by performing matrix-ratio computation or minimum mean square error (MMSE) computation on) the downlink and uplink channel response estimates. The correction factors for the access point and the correction factors for the user terminal are used to obtain a calibrated downlink channel and a calibrated uplink channel, which are transpose of one another. The calibration may be performed in real time based on over-the-air transmission.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: October 29, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Mark S. Wallace, John W. Ketchum, J. Rodney Walton, Steven J. Howard
  • Patent number: 8498304
    Abstract: A switch includes: a packet buffer including a plurality of segments for temporarily storing a packet to be relayed, using a segment of a fixed size as a unit of management of a storage area; an input processor configured to receive a packet to be relayed from an external source, refer to an offset, indicating a location in a segment where a free area starts, store a first packet, starting at the location in the segment indicated by the offset, update the location of start indicated by the offset in accordance with the packet size, and store a second packet, starting at the location of start in the segment thus updated; and an output processor configured to read the first and second packets and send the packets to a communication node.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: July 30, 2013
    Assignee: Fujitsu Telecom Networks Limited
    Inventor: Hiroshi Okagawa
  • Patent number: 8477793
    Abstract: Various methods and devices provide place shifting of a media stream to a remote device while also providing network functionality for a local area network (LAN) and/or a wide area network (WAN). The gateway includes a media interface for receiving audio/visual (A/V) signals from the media source, as well as interfaces to the LAN and/or the WAN. A media streaming module receives the A/V signals from the media interface and processes the received A/V signals to thereby create the media stream. A modem module receives the media stream from the media streaming module via a dedicated connection, network switch and/or other connection, and transmits the media stream to the remote device via at least one of the first and second network interfaces.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: July 2, 2013
    Assignee: Sling Media, Inc.
    Inventors: Raghuveer Tarra, Parimal Bajpai, Sharath Hariharpur Satheesh
  • Patent number: 8477778
    Abstract: As prior art systems fail to produce end-to-end transport and routing mechanisms capable of secure, accurate, and timely delivery of real-time media, the present invention prescribes the method and process to facilitate server-less, IP based sessions across all of public and private network infrastructure without regard for network hardware or carrier makeup. The method and process claimed herein defines the application of well known standards in a unique fashion so as to facilitate transportation of TCP and UDP packets associated with a real-time multicast session in a secure manner while achieving unencumbered access through firewalls and across multiple carrier, public networks through IPSec based virtual networking.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: July 2, 2013
    Inventors: L. Curtis Lehmann, Jr., Thomas A. Dye
  • Patent number: 8477795
    Abstract: A method and apparatus for LDP-IGP synchronization for broadcast networks. In one embodiment of the invention, responsive to a network element bringing up an adjacency with a Designated Router of the broadcast network on a broadcast interface, that network element advertises in its Link State Advertisement (LSA) a peer-to-peer (P2P) adjacency to each member of the broadcast network that has bidirectional IGP communication with the network element instead of advertising a pseudo-node adjacency to the pseudo-node of the broadcast network. Each P2P adjacency includes a high cost to discourage use of those links for transit traffic. After LDP becomes operational with all neighbors on the broadcast interface, the network element advertises the pseudo-node adjacency instead of the P2P adjacencies. Accordingly, transit traffic is avoided through that network element until LDP is operational with all neighbors on the broadcast interface.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: July 2, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Sriganesh Kini, Wenhu Lu
  • Patent number: 8477797
    Abstract: A control-based method for processing media stream queues includes: a multimedia control entity processes the talk burst request queues corresponding to different media types when the conditions of triggering processing of different talk bursts are satisfied; and the multimedia control entity sends the assigned talk burst to the corresponding multimedia session terminal. The present invention also provides a corresponding apparatus. By processing the media stream queues, the present invention ensures talk bursts of multiple correlated media types to be assigned in a session.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: July 2, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Zhu, Long Luo, Liming Zhang, Aiqin Zhang
  • Patent number: 8422501
    Abstract: A method, computer program product, and data processing system for efficiently discovering and storing path MTU information in a sending host are disclosed. In a preferred embodiment, two path MTU tables are maintained. One path MTU table contains MTU values corresponding to the first-hop routers associated with the sending host. The other path MTU table contains MTU values corresponding to individual destination hosts. When the sending host needs to send information to a destination, it first consults the MTU table associated with individual destination hosts. If an entry for that destination host is found in the table, the sending host uses that MTU value. If not, the sending host consults the MTU table for the first-hop router on the path to the destination host and uses that MTU value. If that MTU value is too high, a new entry is made in the host-specific MTU table for the destination host.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: April 16, 2013
    Assignee: International Business Machines Corporation
    Inventors: Ranadip Das, Vinit Jain, Uma Krishnan, Venkat Venkatsubra
  • Patent number: 8422417
    Abstract: A method for communicating with multiple network nodes is provided in which each node of a network has a wireless link that allows data to travel to and from the nodes in parallel, thereby taking advantage of the inherent broadcast capabilities of wireless media. The wireless link may be used in parallel with a point-to-point, land-based network linking the nodes. The method may be used for multicasting or broadcasting data on a network. Specifically, the method may be used to maintain a network cache, a routing database and quality of service in a manner that is more efficient and reliable than previous methods that use serial protocols over point to point network links.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: April 16, 2013
    Assignee: Microsoft Corporation
    Inventor: Darryl Rubin
  • Patent number: 8422374
    Abstract: A method of providing QoS to a session from a client to a first network includes providing data packets from the client to be conveyed in a session from the client to a first network, inserting each of the data packets into an encapsulating packet, and transmitting the encapsulating packets through the second network to the first network, forming a tunnel through the second network. The method includes receiving the encapsulating packets at a terminating device in the first network. The terminating device removes the encapsulating headers to recover the data packets. The method includes determining an association between the packet headers of the data packets and the encapsulating headers, identifying data packets requiring QoS, and using the association to identify encapsulating packets corresponding data packets requiring Quality of Service. The method includes applying QoS to the encapsulating packets, corresponding to the session of data packets requiring the QoS, being conveyed through the tunnel.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: April 16, 2013
    Assignee: Camiant, Inc.
    Inventor: Yusun Kim Riley
  • Patent number: 8411690
    Abstract: Various systems and method of preventing data traffic connectivity between endpoints of a network segment are disclosed. One method involves receiving a segment protocol message from a first segment port within a network segment, which includes a plurality of network devices. In response to receipt of the segment protocol message, which can indicate whether connectivity is present between the segment endpoints via the network segment, a second segment port can be operated in a blocked state. Operating the second segment port in the blocked state prevents data plane connectivity via the network segment.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: April 2, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Lionel Florit, Robert W. Klessig, Francois E. Tallet
  • Patent number: 8411683
    Abstract: Methods and systems are provided for routing or forwarding packet data conforming to two different communication protocols simultaneously in a computer network. The first protocol may be a legacy protocol, such as IPv4, with routing being performed in a manner that maintains legacy behavior and functions. Such functions may include network address translation. The second protocol may be a newer protocol, such as IPv6, with the routing or forwarding being performed through reduced complexity bridging that enables simplified connectivity of second protocol devices. The bridging performed typically requires less memory and processing power than traditional routing techniques such as those implemented for the first protocol. Reduced memory and processing power requirements enable the second protocol routing functions to be added to legacy equipment that would not otherwise be able to support routing of the second protocol packet data.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: April 2, 2013
    Assignee: Comcast Cable Communications, LLC
    Inventor: John Jason Brzozowski
  • Patent number: 8401027
    Abstract: The invention provides an enhanced datagram packet switched computer network. The invention processes network datagram packets in network devices as separate flows, based on the source-destination address pair in the datagram packet. As a result, the network can control and manage each flow of datagrams in a segregated fashion. The processing steps that can be specified for each flow include traffic management, flow control, packet forwarding, access control, and other network management functions. The ability to control network traffic on a per flow basis allows for the efficient handling of a wide range and a large variety of network traffic, as is typical in large-scale computer networks, including video and multimedia traffic. The amount of buffer resources and bandwidth resources assigned to each flow can be individually controlled by network management. In the dynamic operation of the network, these resources can be varied—based on actual network traffic loading and congestion encountered.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: March 19, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: David R. Cheriton, Andreas V. Bechtolsheim
  • Patent number: 8385355
    Abstract: An E-Tree is disclosed which includes a root node associated with a Metro Ethernet network. The E-Tree includes a first Virtual Bridge (VB), associated with the root node, which is configured to process Ethernet traffic, and a second node associated with the Metro Ethernet network. The E-Tree includes a second VB, associated with the second node, configured to process Ethernet traffic and having a first connection between the first VB and the second VB. The second VB is configured to be able to send Ethernet traffic to the first VB via the first connection, if appropriate. In the event there is a second connection between the second VB and a third VB and the second connection has been assigned a down direction from the point of view of the second VB, the second VB is not permitted to send traffic received from the second connection to another connection which from the point of view of the second VB has been assigned a down direction.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: February 26, 2013
    Assignee: Brixham Solutions Ltd
    Inventors: Norival R. Figueira, Richard D. Gitlin
  • Patent number: 8351459
    Abstract: A communication node includes a token-start-right acquisition processor that issues a token-start-right acquisition frame containing specific information, determines a priority based on predetermined reference using specific information for other communication node and the specific information for the own communication node upon reception of a token-start-right acquisition frame from the other communication node, issues the token-start-right acquisition frame at a predetermined time interval when the own communication node has a higher priority than the other communication node, and stops issuing the token-start-right acquisition frame when the own communication node has a lower priority than the other communication node, to forward the token-start-right acquisition frame of the other communication node, and also includes a token start processor that passes the token frame to the ring upon reception of the token-start-right acquisition frame which is issued by the token-start-right acquisition processor and c
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: January 8, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Masato Nakamura
  • Patent number: 8289896
    Abstract: In a mobile communication system which includes a base station controller (20), a plurality of radio base stations (30-1, 30-2) connected to the base station controller, and a mobile station (40) simultaneously communicable with the plurality of radio base stations, the base station controller transfers a packet through the plurality of radio base stations to the mobile station. The mobile station receives the packet as a plurality of reception packets as a plurality of reception packets through the plurality of radio base stations. The mobile station includes a processor (46) and a controller (45). The controller selects, among the plurality of reception packets supplied from the plurality of radio base stations, a best-quality packet as a selected packet. The controller sends, if the selected packet includes an error portion, a retransmission request to one of the plurality of base stations in order to request retransmission of a correct portion corresponding to the error portion.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: October 16, 2012
    Assignee: NEC Corporation
    Inventor: Takayuki Kondo
  • Patent number: 8238352
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network. In addition the access information can be used to detect when an unauthorized device attempts to access the network, posing as an authorized device.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: August 7, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 8213455
    Abstract: A communication node includes a token-start-right acquisition processor that issues a token-start-right acquisition frame containing specific information, determines a priority based on predetermined reference using specific information for other communication node and the specific information for the own communication node upon reception of a token-start-right acquisition frame from the other communication node, issues the token-start-right acquisition frame at a predetermined time interval when the own communication node has a higher priority than the other communication node, and stops issuing the token-start-right acquisition frame when the own communication node has a lower priority than the other communication node, to forward the token-start-right acquisition frame of the other communication node, and also includes a token start processor that passes the token frame to the ring upon reception of the token-start-right acquisition frame which is issued by the token-start-right acquisition processor and c
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: July 3, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventor: Masato Nakamura