Patents Examined by Kenan Cehic
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Patent number: 7920593Abstract: In a passive optical network, dynamic bandwidth allocation and queue management methods and algorithms, designed to avoid fragmentation loss, guarantee that a length of a grant issued by an OLT will match precisely the count for bytes to be transmitted to an ONU. The methods include determining an ONU uplink transmission egress based on a three-stage test, and various embodiments of methods for ONU report 700 threshold setting.Type: GrantFiled: March 30, 2008Date of Patent: April 5, 2011Assignee: PMC-Sierra Israel Ltd.Inventors: Onn Haran, Ariel Maislos, Barak Lifshitz
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Patent number: 7898956Abstract: In accordance with at least one embodiment, credit-based flow control for high-speed interfaces is provided. Decoupling (separation) of high speed interface reference clocks from the interface data rates is enabled. Such decoupling allows consolidation of reference clocks used for high speed interfaces, thereby enabling one reference clock to be used for multiple interfaces having different data rates. It also results in reduced buffer resource (memory) requirements, and reduced system latency. In redundant systems it also simplifies the direct vs. spare selection mechanism.Type: GrantFiled: September 12, 2006Date of Patent: March 1, 2011Assignee: Alcatel LucentInventors: Daniel Semrad, Steve Driediger
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Patent number: 7894469Abstract: A method, computer software program, and system provides automatic selection of time slots in time-division multiplexed connections. A network is mapped, and source and destination nodes are selected, as well as a route between them. Appropriate time slots are selected in a time-division multiplexed signal between the selected nodes, and a connection between the two nodes is automatically created, based at least in part on information related to the selected routes and time slots.Type: GrantFiled: October 20, 2005Date of Patent: February 22, 2011Assignee: Fujitsu LimitedInventors: Min He, Saranagati Chatterjee, Puneet Jain
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Patent number: 7894364Abstract: In a tunnel incoming end-point, for each data packet, the data packet coming from a source device belonging to a same sub-network as the tunnel incoming end-point is received. An effective channel from among the transmission channels is selected, as a function of a protocol associated with the payload data contained in the received packet, and of a piece of information on quality of transport linked to current conditions of transmission on the transmission channels, the piece of information depending on the protocol associated with the payload data contained in the received packet. The received packet is then encapsulated, according to a transport protocol associated with the effective channel, used to obtain a packet to be sent, and the packet to be sent in the tunnel are transmitted on the effective channel selected.Type: GrantFiled: July 21, 2008Date of Patent: February 22, 2011Assignee: Canon Kabushiki KaishaInventors: Stéphane Baron, Pascal Rousseau
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Patent number: 7881346Abstract: An apparatus for transmitting terrestrial digital data using a synchronous-optical-network system or a synchronous-digital-hierarchy system includes a synchronous-difference calculating unit that calculates a synchronous difference between a standard signal used in the synchronous-optical-network system or the synchronous-digital-hierarchy system and a first synchronous signal that synchronizes with a leading position included in image data of the terrestrial digital data; and a transmission processing unit that transmits the synchronous difference together with the terrestrial digital data to a destination.Type: GrantFiled: June 23, 2005Date of Patent: February 1, 2011Assignee: Fujitsu LimitedInventors: Kazuhiro Ohnuma, Masanori Kondo, Toshihiro Ban
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Patent number: 7852876Abstract: Apparatus, and an associated method, for routing data in a communication device defined in terms of a protocol stack. The protocol stack includes an upper logical layer, a lower logical layer, and a mid stack layer. A determiner determines the configuration of the radio bearer by which the data is to be communicated. If a determination is made that the radio bearer is configured such that it does not require its application to the mid stack layers, a data bypasser causes the data to bypass the mid stack layer. If, conversely, the data is to be applied to the mid stack layer, the data is caused to be routed therethrough.Type: GrantFiled: May 5, 2004Date of Patent: December 14, 2010Assignee: M-Stack LimitedInventors: Andrew John Farnsworth, Nicola M. Funnell
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Patent number: 7822023Abstract: The present invention is concerned with a method and a system for improving the quality of service in wireless networks and in particular in dynamically changing mobile ad hoc networks. The method of routing data packets through a network depending on priority information, which is based on the bandwidth requirements of each packet and the distance to the destination. To achieve a particular quality of service, a priority indicator is used to forward each packet at each node in the network. The priority indicator being determined based on a pre-determined relation between the distance and bandwidth information.Type: GrantFiled: April 14, 2003Date of Patent: October 26, 2010Assignee: Nokia CorporationInventors: Keijo Lahetkangas, Kai Mustonen
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Patent number: 7821928Abstract: This invention relates to the multiplexing of multiple sources in a multiplexer. A special arrangement is used for calculating an efficient peak capacity value that guarantees good performance for an outgoing link. The invention uses a method with two phases. The first phase precalculates the capacity of the outgoing link with different numbers of incoming links having equal packet size, and forms a table from the results of the precalculation. In the second phase, the peak capacity needed for the outgoing link is calculated using the precalculated tables.Type: GrantFiled: November 26, 2001Date of Patent: October 26, 2010Assignee: Nokia CorporationInventor: Maunu Holma
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Patent number: 7817673Abstract: A method of synchronising first and second clocks coupled respectively to ingress and egress interfaces 6,7 of a packet network 1, the method comprising calculating a minimum packet Transit Time over the network 1 in each of successive time intervals, and varying the frequency of the second clock so as to track variations in the minimum packet Transit Time.Type: GrantFiled: March 27, 2008Date of Patent: October 19, 2010Assignee: Zarlink Semiconductor LimitedInventors: Martin Raymond Scott, Timothy Michael Edmund Frost, Geoffrey Edward Floyd, Martin Crowle
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Patent number: 7801042Abstract: Routing techniques are provided that meet performance objectives associated with an ad-hoc network environment and the like. The techniques of invention serve to substantially maximize the lifetime of the network. In one aspect of the invention, a packet routing technique for use in a node of a distributed network comprises the following steps/operations. Queues for storing packets are maintained, wherein at least one queue is associated with a link existing between the node and a neighboring node, and a queue has a height associated therewith. A route is then determined for one or more packets stored in the queues based on heights of queues at neighboring nodes, such that energy constraints associated with the node and the neighboring nodes are substantially maximized. As mentioned, the distributed network is preferably a mobile ad-hoc network wherein the node and the at least one neighboring node communicate over a wireless link.Type: GrantFiled: December 20, 2002Date of Patent: September 21, 2010Assignee: International Business Machines CorporationInventors: Zhen Liu, Arvind Sankar
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Patent number: 7787492Abstract: The technology relates to resource allocation in communications systems. In such a system, the pool of resources that can be provided to connected user equipment for usage in conducting communications services are divided into multiple resources classes. This class division is based on a characteristic allocation time of resource allocation procedures that can be applied on resources of the different classes. For each class, a resource utilization measure is determined. It is then determined, based on this measure, whether or not a resource allocation procedure associated with the current class should be triggered. This selective triggering can be realized through a comparison between the measure and a threshold associated with the current class. Both the measure determination and selective triggering are performed for a given class before continuing with a next class, preferably starting with the class having slowest resource allocation procedures.Type: GrantFiled: October 31, 2003Date of Patent: August 31, 2010Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Bogdan Timus, Peter Ökvist
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Patent number: 7778278Abstract: A method for communicating data is provided that includes receiving a plurality of bits associated with a communications flow and determining whether one or more samples included in the flow should be suppressed. The method also includes suppressing a selected one or more of the samples if the selected samples are similar to previously received samples. In a more particular embodiment, the method also includes positioning unique samples that are included in the flow in a super-frame to be communicated to a next destination. Additionally, the method may include receiving the unique samples and evaluating the unique samples in order to restore a plurality of bits associated with the communications flow.Type: GrantFiled: March 28, 2005Date of Patent: August 17, 2010Assignee: Cisco Technology, Inc.Inventors: Scott A. Bales, Frank G. Bordonaro, John P. Fussell, Bernie P. Pearce, Uwe Sellentin, Paul A. Schmidt
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Patent number: 7742501Abstract: Systems and methods for transporting data from a source network to a destination network by way of a transport network. Data transmission units (DTUs) from the source network are received at a server logically located between the source and the transport networks. These first DTUs are subdivided into second DTUs and are transmitted to the destination network by way of the transport network. Also transmitted are encoded or extra second DTUs that allow the original first DTUs to be recreated even if some of the second DTUs are lost. These encoded second DTUs may be merely copies of the second DTUs transmitted, parity second DTUs, or second DTUs which have been encoded using erasure correcting coding. At the destination network, the second DTUs are received and are used to recreate the original first DTUs. In the event an insufficient number of second DTUs are received, such that recreating the original first DTU cannot be accomplished, a re-transmission of the second DTUs is requested.Type: GrantFiled: August 6, 2004Date of Patent: June 22, 2010Assignee: IPEAK Networks IncorporatedInventor: Matthew Robert Williams
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Patent number: 7738398Abstract: An identification system for identifying and validating selected components of a communication system and methods for manufacturing and using same. The communication system includes a host system that is configured to couple with one or more target systems. When the host system is coupled with a selected target system, the communication system can enter an identification mode wherein the selected target system can provide identification data to the host system. The identification data includes information regarding at least one target system characteristic associated with the selected target system such that the host system can attempt to identify the selected target system based at least in part upon the target system characteristics. Once the selected target system has been identified, the communication system likewise can at least partially reconfigure the host system, as necessary, such that the host system can be compatible with the selected target system.Type: GrantFiled: November 17, 2004Date of Patent: June 15, 2010Assignee: Quickturn Design Systems, Inc.Inventors: Barton L. Quayle, Mitchell G. Poplack, Peter Tannenbaum
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Patent number: 7738399Abstract: An identification system for identifying and validating selected components of a communication system and methods for manufacturing and using same. The communication system includes a host system that is configured to couple with one or more target systems. When the host system is coupled with a selected target system, the communication system can enter an identification mode wherein the selected target system can provide identification data to the host system. The identification data includes information regarding at least one target system characteristic associated with the selected target system such that the host system can attempt to identify the selected target system based at least in part upon the target system characteristics. Once the selected target system has been identified, the communication system likewise can at least partially reconfigure the host system, as necessary, such that the host system can be compatible with the selected target system.Type: GrantFiled: November 17, 2004Date of Patent: June 15, 2010Assignee: Quickturn Design Systems Inc.Inventors: Barton L. Quayle, Mitchell G. Poplack, Peter Tannenbaum
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Patent number: 7733915Abstract: According to some embodiments of the invention, a method of minimizing buffer requirements, in a packet based multimedia system having a multimedia source device coupled to a multimedia display device by way of a bi-directional auxiliary channel arranged to transfer information between the display device and the source device and vice versa and a unidirectional main link arranged to carry multimedia data packets from the multimedia source device to the multimedia display device is disclosed. Interspersing special characters that allow the display device to distinguish each bit of pixel data included in the data packets thereby requiring only a small FIFO type buffer unit.Type: GrantFiled: December 2, 2003Date of Patent: June 8, 2010Assignee: Genesis Microchip Inc.Inventor: Osamu Kobayashi
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Patent number: 7724689Abstract: An interface device and interface device control method that switches a transmission rate to enable high-speed transmission when necessary. In devices (nodes) provided with an interface device, a transmission rate control circuit decreases the frequency of a clock signal to only enable low-speed transmission operations during low-speed transmission and when a transfer operation is not being performed. A node requiring switching to a high-speed transmission rate negotiates with each node included in a route to a transfer destination and reads the device information stored in the register to confirm whether or not each node has a transmission capacity applicable for high-speed transmission. Then, when the transmission capacity is applicable for high-speed transmission, the transmission rate control circuit increases the frequency of the clock signal to change the operating speed of its node and each of the nodes requiring the switching of the transmission rate to high-speed transmission.Type: GrantFiled: December 3, 2003Date of Patent: May 25, 2010Assignee: Fujitsu Microelectronics LimitedInventor: Hiroyuki Tsujimoto
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Patent number: 7720018Abstract: A process for secure, safe, and easy provisioning of a wireless device with credentials to connect to a wireless network. A connecting wireless device and an established wireless device both utilize low power transmission at close proximity to exchange wireless connection setting information and/or a password. The connecting wireless device is moved into proximity with the established wireless device and a low power setting is discovered at which the wireless devices may communicate with a sufficiently low error rate. The connecting wireless device is then passed the secret information by the established network device.Type: GrantFiled: April 21, 2005Date of Patent: May 18, 2010Assignee: Microsoft CorporationInventors: Amer A. Hassan, Abhishek Abhishek, Christopher J. Corbett, Christian Huitema, David A. Roberts
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Patent number: 7719989Abstract: A routing method for an ad hoc network is disclosed, the network comprising two or more nodes (A, B, C, D, E, F), and the method comprising: sending a message from a start node (A) to a finish node (F) via one or more intermediate nodes (B, C, D, E); each of the start node (A) and intermediate nodes (B, C, D, E) receiving an acknowledgement signal (AckB, AckC, AckD, AckE, AckF) from a one-hop neighboring node when the one-hop neighboring node receives the message from the start node (A;F) or intermediate nodes (B, C, D, E) and, in the case of the one-hop neighboring node not being the finish node (F), the start node and intermediate nodes receiving an acknowledgement signal (AckC, AckD, AckE, AckF) from a two-hop neighboring node when the two-hop neighboring node receives the message from the one-hop neighboring node.Type: GrantFiled: July 23, 2004Date of Patent: May 18, 2010Assignee: Royal Holloway and Bedford New CollegeInventor: Po-Wah Yau
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Patent number: 7719999Abstract: A method and apparatus of predicting link quality of a link are disclosed. One exemplary method includes a receiver receiving multi-carrier modulated signals over a period of time. A signal to noise ratio (SNR) for each received sub-carrier is estimated. An ordered sequence of the signal to noise ratios (SNR)s are constructed based on interleaving of the multi-carrier modulated signals, wherein an order of the interleaving is used to set the ordered sequence of the signal to noise ratios (SNR)s. The receiver estimates link packet error rate (PER) based upon knowledge of encoding of the multi-carrier modulated signals used during transmission and the ordered sequence.Type: GrantFiled: September 4, 2008Date of Patent: May 18, 2010Assignee: NDSSI Holdings, LLCInventors: Dengwei Fu, Sujai Chari, Mohan Ramasudha Karnam