Patents Issued in October 2, 2008
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Publication number: 20080239942Abstract: Systems and methods for verifying recovery from intermittent hardware faults. Exemplary embodiments include a method for verifying recovery from intermittent hardware faults, the method including generating an error in a computer interface by forcing a hardware fault after setting an error injection enable control bit in a register coupled to the computer interface, detecting an error in a hardware checker coupled to the computer interface which asserts an error interrupt signal resetting the error injection enable control bit when the error interrupt signal and a hardware reset control bit coupled to the computer interface are both active, disabling error forcing when the error injection enable control bit is reset, and executing an error recovery and logging procedure in the computer interface.Type: ApplicationFiled: March 29, 2007Publication date: October 2, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Joe S. Hsu, Mark C. Johnson, Hugh W. McDevitt
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Publication number: 20080239943Abstract: A loop protection mechanism including dynamically determining a link connecting two adjacent nodes of a loop in a communication network in accordance with a predefined criterion, and reconfiguring the loop so that the loop is broken at the determined link which is an optimal link in terms of the predefined criterion. The breaking of the loop enables for example to utilize loop-free technologies (e.g. Ethernet) in a physical loop architecture.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Markus Hauenstein, Jouko Kapanen, Gerald Berghoff
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Publication number: 20080239944Abstract: In an embodiment, a system and method which monitors a signaling plane for error events among one or more network nodes in a converged network. The system and method classifies and calculates, based on user defined parameters, a threshold value or percentage of error events which occur within a desired amount of time and automatically triggers an alert in the network that a potential network connectivity problem exists in the transport plane. In an embodiment, the trigger automatically initiates troubleshooting procedures to solve the network connectivity problem.Type: ApplicationFiled: March 29, 2007Publication date: October 2, 2008Inventors: Ramprasad Golla, Sudhir Rao
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Publication number: 20080239945Abstract: Disclosed are a PCI switch assembly, having automatic link failover, and a computer system including that switch assembly. The switch assembly comprises first and second interconnected, peripheral component switches. Each of the these switches has first and second primary ports and a plurality of secondary ports. The switch assembly has a normal mode and a failover mode. In the normal mode, each switch routes data through the switch to the secondary ports of the switch. In the failover mode, a failover path is defined and data are routed from the first switch to the second switch and then to one of the secondary ports of the second switch. The second switch detects a predefined fail condition, and changes the switch assembly from the normal mode to the failover mode in response to detecting the predefined fail condition.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Thomas A. Gregg
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Publication number: 20080239946Abstract: According to an aspect of an embodiment, a communication system comprises: a. a first information processing device; b. a first communication line and a first backup line connected to the first information processing device, respectively; c. a second information processing device; d. a second communication line and second backup line connected to the second information processing device, respectively; e. a first switch comprising: a first port connected to the first communication line; a second port connected to the second backup line; and a controller for performing of: detecting a failure of the first port; switching the second backup line; and sending a notification; and f. a second switch comprising: a third port connected to the first backup line; a fourth port connected to the second communication line; and a controller for performing of: receiving the notification; switching the first backup line and the second communication line.Type: ApplicationFiled: March 27, 2008Publication date: October 2, 2008Applicant: FUJITSU LIMITEDInventor: Satoshi Morita
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Publication number: 20080239947Abstract: In one embodiment, the present invention is a method and an apparatus for failure-resilient forwarding of data over a computer network. In one embodiment, a marker is introduced into the data stream, e.g., at the sending node, and allows, in turn, forwarding nodes and/or receivers to efficiently track data stream reception. The marker functions as a checkpoint for the data transport process, and is identified and indexed at each forwarding node and receiver. Each receiver saves the marker prior to delivering data to an application, thereby designating a point in the data stream at which all preceding data is confirmed to have been delivered to the application. Thus, if a forwarding node fails, the receiver may request stream data from an alternate forwarding node by specifying to the alternate forwarding node to provide data starting from the marker.Type: ApplicationFiled: June 9, 2008Publication date: October 2, 2008Inventors: ZHEN LIU, Sambit Sahu, Jeremy I. Silber
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Publication number: 20080239948Abstract: Methods and apparatus are provided to improve data throughput in a wireless, wireline or a combination wireless and wireline communication system. A congestion control manager selects between an assumption based congestion control algorithm and a speculation based congestion control algorithm. The selected algorithm generates data recovery instructions including instructions for resizing, or not, congestion window sizing for the communication gateways. By making the selection between the assumption based congestion control algorithm and the speculation based congestion control algorithm based upon network information, data recovery and throughput is optimized for networks having lossy data links.Type: ApplicationFiled: March 28, 2007Publication date: October 2, 2008Applicant: HONEYWELL INTERNATIONAL, INC.Inventors: Haowei Bai, David J. Lilja
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Publication number: 20080239949Abstract: In cell read from a buffer for each priority provided in the intermediate stage buffers 1-5-1-1-5-N, cells can be read even from a low priority buffer within a fixed time period and at the output interfaces 1-12-1-1-12-N, cell arrival can be monitored individually on a priority basis and on a basis of each of the input interfaces 1-1-1-1-1-N while taking a cell reading cycle at the intermediate stage buffer into consideration.Type: ApplicationFiled: March 25, 2008Publication date: October 2, 2008Applicant: NEC CORPORATIONInventor: HIDEKI NISHIZAKI
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Publication number: 20080239950Abstract: A telecommunications system. The system includes a communications network. The system includes N nodes, where N is an integer greater than or equal to 2, which run a same or different applications and process a same or different ranges of application level traffic, and which communicate with each other through the network using signaling by SIGTRAN protocols. Each of the N nodes has a full receive state where a node receives any type of traffic from the other nodes and an isolated receive state where the node only receives allocated traffic from the other nodes. The node sends traffic to the other nodes whether the node is in the full receive state or the isolated receive state. A method for communicating.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Inventors: Alexandru Hlibiciuc, Robert Schnell, Frank Uretschlaeger, Boris Sumic, Una Vizek
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Publication number: 20080239951Abstract: A computer implemented method, apparatus, and computer usable program code for controlling when to send messages in a stream processing system. A policy is determined by utilizing probability statistics and a cost function prior to stream processing. The policy specifies under which conditions a message is sent eagerly and under which other conditions the message is delayed. A filter is operated during stream processing that selects which of the messages to send from a sending transform based upon a threshold. A controller is operated during stream processing that observes a current state of a receiving transform and that applies the policy based on the current state to determine whether to change the threshold.Type: ApplicationFiled: May 6, 2008Publication date: October 2, 2008Inventor: ROBERT EVAN STROM
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Publication number: 20080239952Abstract: In one embodiment, an Ethernet bridge operates in either VLAN aware mode or VLAN unaware mode as specified by a user. The width of a CAM used for storing address table can be minimized by using a mapping of VLAN identifiers to small numbers, which are stored in the CAM. Flooding can be minimized by employing various techniques. Communication can be quickly re-established even if the Ethernet address (or the machine having that address) moves to be reachable on different ports of the Ethernet bridge. Sufficiently quick response to bridge protocols may be ensured by using an external processor to generate responses, and providing a higher priority DMA channel to transfer packets related to the bridge protocols.Type: ApplicationFiled: June 9, 2008Publication date: October 2, 2008Applicant: TEXAS INSTRUMENTS INCORPORATEDInventor: Tushara Kanta Swain
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Publication number: 20080239953Abstract: Methods and apparatus are provided to reduce data congestion and thus improve data throughput in gateways used in a wireless, wireline or a combination wireless and wireline communication system. The congestion management system optimally resizes, or not, congestion window (or buffer) sizing and threshold for the communication gateways based upon mathematical models. Application of the inventive congestion management method optimizes data recovery and throughput in communication networks, particularly those networks having lossy data links.Type: ApplicationFiled: March 28, 2007Publication date: October 2, 2008Applicant: HONEYWELL INTERNATIONAL, INC.Inventors: Haowei Bai, David J. Lilja
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Publication number: 20080239954Abstract: A method of communicating with a network interface includes providing a packet to the network interface, where the packet includes an address field indicating a destination of the packet. The network interface analyzes the address field, and determines if it reflects an address associated with the network interface. If not, the network interface provides the packet to a network. If the network interface determines the address field reflects an address associated with the interface, it provides information in the packet to an application executing at the network interface. Accordingly, information targeted to an application can be communicated by associating an address, such as a network address, with the network interface, allowing for communication of the information without extensive processing of each packet at the interface.Type: ApplicationFiled: March 21, 2008Publication date: October 2, 2008Applicant: BIGFOOT NETWORKS, INC.Inventors: Harlan T. Beverly, Kumar Gala
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Publication number: 20080239955Abstract: In one embodiment, a network device is described as including a rate monitor to monitor an actual individual message rate of event messages sent from each one of a plurality of sending devices operatively in communication with the network device, an allocator to allocate an individual message rate limit to each of the plurality of sending devices, and a communication module to communicate a rate limit instruction to at least one of the sending devices, the rate limit instruction to limit the transmission rate of event messages.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Applicant: CISCO TECHNOLOGY, INC.Inventors: Steve Chen-Lin Chang, Shyyunn Sheran Lin, Junekang Yang, Jianbin Zhao, Ludwig Alexander Clemm
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Publication number: 20080239956Abstract: A data and control plane architecture for network devices. An example system architecture includes a network processing unit implementing one or more data plane operations, and a network device operably coupled to the network processing unit that implements a control plane. In a particular implementation, the network processing unit is configured to process network traffic according to a data plane configuration, and sample selected packets to the network device. The network device processes the sampled packets and adjusts the data plane configuration responsive to the sampled packets.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Packeteer, Inc.Inventors: Jon Eric Okholm, Guy Riddle
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Publication number: 20080239957Abstract: The invention implements inter-terminal transmission with guaranteed capacity based on the single-path configuration function of networks composed of switching hubs with an MAC address learning function and centralized management of transmission capacity, without control over hubs. The capacity to be used by transmission links on a network is stored in advance and transmission capacity along the path to be used is allocated based on requests from terminals, with the allocation removed using a Terminate Request. At such time, by using transmission links and switching hubs with an MAC address learning function, transmission is limited to single-path transmission.Type: ApplicationFiled: July 7, 2004Publication date: October 2, 2008Inventors: Nobuyuki Tokura, Keisuke Inoue, Haruo Yago
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Publication number: 20080239958Abstract: Routing path calculation apparatus and methods are disclosed. Calculation of routing paths within different routing areas of a communication system is handled by respective routing path calculation devices. Multiple devices may be requested to perform respective routing path calculations for segments of a routing path between endpoints in different routing areas. Recalculations may be requested from the same or different devices in the event of a change in a routing area that affects a segment of a routing path. A routing path calculation device, whether or not in this type of distributed routing path calculation system, may determine whether a previously configured path exists between an intermediate node of a calculated routing path, and take the previously configured path into account in calculating the routing path if it is determined that a previously configured path exists. The previously configured path may be an Interior Gateway Protocol (IGP) shortcut, for example.Type: ApplicationFiled: March 28, 2007Publication date: October 2, 2008Inventors: Christopher Warren Murray, Reza Mohammad Rokui, Ehsan Rezaaifar, Chuong Ngoc Ngo
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Publication number: 20080239959Abstract: Methods and apparatus are provided with improved routing techniques for bifurcated flows. Routing methods and apparatus are provided that obtain a fractional flow from a set of nodes to a given destination having a maximum load, L, on any link between a node in the set and the given destination; and generate a bifurcated flow between the set of nodes and the given destination from the fractional flow such that the maximum load on any link in the bifurcated flow does not exceed 2L, wherein the bifurcated flow allows a flow from a given node to be sent on at most two outgoing links.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Frederick B. Shepherd, Gordon T. Wilfong
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Publication number: 20080239960Abstract: An improved solution for managing messages through a request response protocol network utilizing a path-based adaptive prioritization and latency management is provided. In an embodiment of the invention, a method of managing a message being conveyed through a request response protocol network via a path includes: receiving the message; determining for the message at least one of: an incoming portion of the path or an outgoing portion of the path; and adjusting a priority of the message based on a latency target for the determined portion of the path.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Erik J. Burckart, John P. Cammarata, Curtis E. Hrischuk, Michael J. Spreitzer
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Publication number: 20080239961Abstract: A traffic manager may monitor network performance, detect that the network performance has changed, and may prioritize network traffic based on which application or function is associated with the traffic. Each packet of network traffic may be analyzed to determine a source application or source function and allowed or disallowed along the network based on a set of predetermined priorities. Several sets of priorities may be established for various network performance conditions. In some embodiments, traffic may be routed along different paths using the sets of priorities and the source application or function. The traffic manager is adaptable for web-based services, applications, or other functions provided over a network connection.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Microsoft CorporationInventors: Israel Hilerio, Eric B. Watson, Lingan Satkunanathan, Bjorn B. Levidow
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Publication number: 20080239962Abstract: RNC includes an RNSAP protocol unit that receives a protocol message containing TFS (maximum number of blocks, TB size, TTI), a data definition unit that defines a first factor which is an average value of transport blocks and a second factor which is an average value of data size of a particular portion of an IP transport, and a resource management/CAC unit that calculates the amount of data on a user plane and the amount of data in the particular portion of the IP transport by using TFS that is included in the received protocol message and the first and second factors. The resource management/CAC unit employs the sum of the calculated amount of data on the user plane and amount of data in the particular portion as a band accumulated value for connection admission control.Type: ApplicationFiled: March 17, 2008Publication date: October 2, 2008Inventor: MASAHIKO KOJIMA
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Publication number: 20080239963Abstract: Methods, systems and computer program products for load balancing using Mobile Internet Protocol (IP) Version 6 are provided. A request for a connection is received from a client at a routing stack. A Mobile IP Version 6 Binding Update message is transmitted from the routing stack to the client responsive to the received request. The Binding Update message identifies a selected target stack so as to allow the client to communicate directly with the target stack bypassing the routing stack.Type: ApplicationFiled: June 20, 2008Publication date: October 2, 2008Inventor: ROY F. BRABSON
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Publication number: 20080239964Abstract: In an edge region between an access network for connection to an IP communication terminal of a subscriber via a gateway and a core network for providing the subscriber with an IP telephone service, a service edge node and a guidance server are disposed. The service edge node controls a call initiation request received from the subscriber based on a congested state of the core network and a priority given to the subscriber. The guidance server transmits guidance to the subscriber without the intermediation of the core network.Type: ApplicationFiled: March 14, 2008Publication date: October 2, 2008Inventor: HARUO MITSUTAKE
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Publication number: 20080239965Abstract: The invention discloses a method and a system of reporting terminal information in Device Management (DM) field. The method includes: the terminal reporting terminal information through an information reporting interface provided by a DM Agent module; the DM Agent module forwarding the terminal information to a DM Server; and the DM Server reporting the terminal information to a Maintenance Unit (MU) through a local information reporting interface. The invention also discloses a method and a system for maintaining terminal device in DM field as well as a DM system.Type: ApplicationFiled: April 30, 2006Publication date: October 2, 2008Inventor: Jie Tang
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Publication number: 20080239966Abstract: A test apparatus for testing a device under test including a receiving circuit for receiving signals transmitted through a communication cable is provided. The test apparatus includes: a waveform generating section for outputting waveform data to define a waveform to be provided to an input terminal of a receiving circuit; a digital filter having the filter characteristic substantially reverse to the attenuation characteristic of the communication cable, for outputting amplified waveform data obtained by amplifying the waveform data; a DA converter for converting the amplified waveform data to an analog waveform; and a low-pass filer having the attenuation characteristic substantially same as that of the communication cable, for attenuating the analog waveform and providing the same to the receiving circuit.Type: ApplicationFiled: April 30, 2007Publication date: October 2, 2008Applicant: ADVANTEST CORPORATIONInventor: MOTOO UEDA
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Publication number: 20080239967Abstract: A network performance estimating device for estimating network performance of a parallel computing machine for executing plural processes in parallel, includes a communication data obtaining unit that obtains communication data output from plural calculation nodes when the plural processes are executed by using the plural calculation nodes, a design estimating unit for referring to a design information storing unit that stores design information defining a network as an estimation target to execute a simulation on communications when the communication data obtained by the communication data obtaining unit are transmitted through the network as the estimation target, and renews estimation information representing an estimation result of the estimation target network stored by an estimation information storing unit on the basis of the obtained simulation result, and a communication data transmission unit for transmitting the communication data obtained by the communication data obtaining unit to an addressed caType: ApplicationFiled: March 18, 2008Publication date: October 2, 2008Applicant: FUJITSU LIMITEDInventor: Yoshiro Ikeda
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Publication number: 20080239968Abstract: Methods and apparatus are provided for routing calls or call information. A gateway may span a plurality of networks and determine call routing information based on one or more rules defining a dial plan. Various actions may be taken in response to incoming calls matching rules of the dial plan. User interfaces may be provided that allow editing and/or testing of the dial plan by an administrator.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Inventors: Ronald D. Olsen, Melissa J. Melnik
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Publication number: 20080239969Abstract: The present invention discloses a method for data forwarding used in label switching networks, with which, at the source node, sequence numbers are added to the data packets forming an original data flow to be forwarded according to the forwarding order, then the data packets are mapped to label switched paths (LSP) for forwarding; at the destination node, the data packets received from the LSPs are merged into the same data flow as the original data flow to be forwarded according to the order of the sequence numbers. Meanwhile, during the data forwarding in accordance with the invention, an alarm mechanism is used to detect a faulted LSP, and the mapping strategy is adjusted timely to avoid the massive loss of the data packets, which guarantees the security of the data forwarding to the greatest extent while a high bandwidth utilization ratio is ensured.Type: ApplicationFiled: January 28, 2006Publication date: October 2, 2008Inventors: Jianfei He, Chaogang Lu, Wei Fu, Xingque Quan, Xiaodong Li
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Publication number: 20080239970Abstract: A method is provided for determining the integrity of a domain defined in a network. The method includes processes and systems to facilitate the discovery a conceptual ring topology of the domain in the network, and the determination of the integrity of the domain based on the conceptual ring topology that was discovered.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Zihong Lu, Richard A. Meier, Sunil P. Shah, Raj Nagarajan
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Publication number: 20080239971Abstract: An MAC address of each of devices under testing is entered. An IP address is assigned to each entered MAC address. The IP addresses and telephone numbers assigned to the devices and a failure test terminal are associated with one another and registered in a system server. Out of telephones connected to the devices, sets of two telephones are determined. For each set, a call is made from a first telephone connected to the device to a second telephone connected to another device. When the communication is established, a call is made from the called second telephone to the first telephone. If the communication is not established, communication with a telephone connected to the failure test terminal is tried. Thereby, adequate test on a large number of devices with simple operation is possible in performing an operation test on a VoIP device.Type: ApplicationFiled: July 5, 2005Publication date: October 2, 2008Applicant: SOFTBANK BB CORP.Inventor: Junichi Miyakawa
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Publication number: 20080239972Abstract: An approach is disclosed for monitoring performance of a network providing multicast and mobility services. A test profile is generated for determining performance of the multicast network. The test profile is uploaded on a mobile host that is configured to communicate over the multicast network, wherein the mobile host is further configured to participate in a test session according to the test profile. Test session information tracked by the mobile host is collected for evaluation of metrics for the performance of the multicast network.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Verizon Services Corp.Inventor: Hassan M. OMAR
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Publication number: 20080239973Abstract: The invention relates to a data integrity checking system in a frame-switched on-board network, comprising at least first and second asynchronous transmitter terminals, with the second (202) being in charge of monitoring the first (201), and at least first and second receiving terminals, with the second (204) being in charge of monitoring the first (203).Type: ApplicationFiled: March 24, 2008Publication date: October 2, 2008Applicant: Airbus FranceInventors: Remi CABARET, Francoise DAVID-TUPINIER, Remi ANDREOLETTI
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Publication number: 20080239974Abstract: A method and apparatus for measuring network performance. A packet from a stream of multimedia data packets is received from across a network during a measurement interval. The time interval from the start of the measurement interval to receiving the packet is measured. The response of a buffer to the received packet is determined. The level of the buffer just before the packet arrives is calculated, based on the time interval. The level of the buffer just after the packet arrives is calculated, based on the previous level. A performance measure for the network is determined based on at least one of the two levels.Type: ApplicationFiled: March 28, 2007Publication date: October 2, 2008Inventors: Earl Chew, Laura Choy, Kevin M. Cattell
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Publication number: 20080239975Abstract: A collision handling receiver for use in a data communication network. The collision handling system and method comprises collision handling receivers together with transmitters inserting pseudo-random delays. Accordingly, multiple sources may transmit simultaneous messages to a receiver so that the messages arrive with varying signal levels and times of arrival. The receiver sorts the symbols into separate sequences by grouping together symbols having similar time of arrival. In addition, the receiver retains the sequences with sufficiently reliable symbol detection, for example, when 75% of the symbols in a sequence are detected with sufficient quality. Receiver then ranks the retained transmitters by received signal level and decodes the messages from transmitters with highest received signal level.Type: ApplicationFiled: March 27, 2007Publication date: October 2, 2008Applicant: Crane Co.Inventors: Alan K. Hunt, Ramin Borazjani
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Publication number: 20080239976Abstract: A method for monitoring communication includes intercepting one or more communication links, which are part of a communication system that includes a plurality of the communication links. Data content that is carried by the one or more communication links is decoded. First and second mathematical fingerprints related to the one or more intercepted communication links are computed by evaluating statistical characteristics of the data content decoded from the one or more communication links. The first and second fingerprints are compared to produce a matching result, and a predefined action is performed with respect to the one or more communication links responsively to the matching result.Type: ApplicationFiled: March 27, 2007Publication date: October 2, 2008Inventor: Yuval Altman
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Publication number: 20080239977Abstract: Methods and arrangements for wireless communications are contemplated. Embodiments include transformations, code, state machines or other logic to determine the signal to noise ratios (SNRs) of multiple stations associated with an access point in a wireless network. The embodiments may also include selecting whether one of the stations communicates with the access point by an orthogonal frequency division multiplexing (OFDM) transmission method or a multiple-access joint coding/decoding transmission method, the selecting based upon the SNRs and communicating the selected transmission method to the station of the multiple stations. Some embodiments may include determining an SNR threshold level, selecting the MAC transmission method if the SNR of at least one of the multiple stations is below the SNR threshold level, and selecting the OFDM transmission method if the SNRs of all of the multiple stations are above the SNR threshold level. Other embodiments are described and claimed.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Feng Xue, Jun Shi, Sumeet Sandhu
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Publication number: 20080239978Abstract: An Internet Protocol (IP) telephone operates a communications uplink to a switch based on activity on a separate communications downlink (such as to a personal computer) to conserve power when possible. The IP telephone monitors the communications activity of a link partner on the communications downlink, and when the link partner is present and operating at a relatively high data rate, the IP telephone operates the communications uplink at a correspondingly high data rate to support the communications needs of the IP telephone and the link partner. If the monitoring indicates that the link partner has reduced communications activity (which may include becoming entirely disconnected from the communications downlink), the IP telephone transitions to a second operating condition to operate the communications uplink at a relatively low data rate, with a corresponding decrease in the power required for operation of the communications uplink interface circuitry.Type: ApplicationFiled: April 2, 2007Publication date: October 2, 2008Applicant: Cisco Technology, Inc.Inventors: Roger Karam, Karl Nakamura, Palaniappan Karuppan, Shriram Velaga
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Publication number: 20080239979Abstract: A system uses policy to monitor web services. A request of quality of service (QoS) is thus achieved. A control center monitors and manages service monitors to collect data from QoS units. A service level agreement (SLA) can be used with the policy for assigning tasks. The QoS request from a service requester can be thus fulfilled.Type: ApplicationFiled: October 29, 2007Publication date: October 2, 2008Applicant: National Central UniversityInventors: Li-Der Chou, Cheien-Chi Chen, Yi-Ming Lin
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Publication number: 20080239980Abstract: The present invention advantageously provides a method for estimating an interference map for nodes in a network by continuously broadcasting packets from a jammer node at maximum capacity, simultaneously recording a delivery ratio from the jammer node to every other network node, concurrently, for all nodes except the jammer node, randomly broadcasting data, recording a sender interference of the node to another node having the sender interference from the jammer node, recording a receiver interference of the second node to the first node having the receiver interference from the jammer node, and performing each of the previous steps for all network nodes. The sender interference can be determined by broadcasting the data at a fixed rate when the jammer node's sender interference disabled, or by unicasting data from a node more than once to a nonexistent address, and measuring a time difference between receiving the broadcast data.Type: ApplicationFiled: February 13, 2008Publication date: October 2, 2008Applicant: NEC Laboratories America, Inc.Inventor: Dragos Niculescu
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Publication number: 20080239981Abstract: The present invention provides a communication control system that monitors a status of a transmission line, and can dynamically change a communication band used by a communication device included in an access line based on the monitored result. Line terminal devices (200-1 to 200-n) monitor a status of transmission lines (1, 2) connected to the line terminal devices (200-1 to 200-n), and control a communication band used for performing data communication in accordance with the status of the transmission lines (1, 2). A line aggregation device (300) monitors a status of transmission lines (2, 3), and controls a communication band used for performing data communication in accordance with the status of the transmission lines (2, 3).Type: ApplicationFiled: March 12, 2008Publication date: October 2, 2008Inventors: YASUHISA KANDA, Hiroshi Nakaishi, Kazuhito Ikai
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Publication number: 20080239982Abstract: In a network for digital data packet transmission, quality records are stored in a memory. Each of the quality records is indicative for a reception quality being sensed of one or more received data packets. Thereupon, upon overflow of the memory, one or more of the quality records is discarded from the memory. For at least one of the quality records, discarding weights are generated as a function of at least one of the quality records and associated to the quality records. Hereby, upon such overflow, the discarding weights are taken into account in predefined rules and conditions according to which the discarding of the quality records is performed.Type: ApplicationFiled: April 1, 2008Publication date: October 2, 2008Inventors: Dirk VANDERHAEGEN, Danny VAN BRUYSSEL
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Publication number: 20080239983Abstract: In datacenter environments, many copies of servicing components (application servers, http servers, etc) are used to handle larger loads. In these cases, incoming service requests typically go to a load balancer to be directed to the appropriate servicing component. Modern advances in technology, like the Server/Application State Protocol, have allowed load balancers to receive recommendations in the form of numerical weights to describe the best distribution for the incoming requests. The present invention provides a method for computing path oriented statistics that enable load balancing algorithms to transparently integrate downstream performance and resource usage statistics into load balancing weights.Type: ApplicationFiled: May 6, 2008Publication date: October 2, 2008Inventors: John Alan Bivens, Yuksel Gunal, Peter Bergersen Yocom
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Publication number: 20080239984Abstract: An energy saving system/network is used to control the power of air conditioners (AC) in hotels/motels. The system includes a master device and an array of slave devices. The master device may be installed in the hotel/motel front desk area, while the slave devices may be installed in guest rooms. The master device communicates with the slave devices via the power lines in the hotels/motels. This system/network automatically turns on the AC power when the guest is checked in and turns off the AC power when the guest is checked out.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Inventors: Kevin Le, Thanh Le
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Publication number: 20080239985Abstract: A method, system and computer usable program code is disclosed for mapping a logical topology to information technology (IT) resources. The method comprises the steps of generating a logical topology of resources for a solution to a given request for resources, extracting information about shared rules and constraints on IT resources specific to a plurality of customers, and generating multiple mappings from the logical topology to the IT resources that satisfy said shared rules and constraints.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Alexei A. Karve, Ajay Mohindra, Randy A. Rendahl, Alla Segal
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Publication number: 20080239986Abstract: System and method for automatically detecting nodes, components and interfaces in a network. A preferred embodiment comprises detecting nodes in a network, wherein the nodes are coupled to a network controller, comprises identifying ports for the network controller, capturing messages received by the network controller at the ports, parsing the messages to identify a node address parameter, wherein the node address parameter uniquely identifies the node to the network controller, and if the node address parameter has not been previously identified, adding a new entry to a node database.Type: ApplicationFiled: March 5, 2008Publication date: October 2, 2008Applicant: TEKTRONIX, INC.Inventors: QIQUAN XU, KAMAT ASHWINI, SESHU DOMMARAJU
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Publication number: 20080239987Abstract: System and method for identifying interfaces and channels in a network using messages passing through the network. An embodiment comprises detecting components of a network, comprises capturing a message from the network, extracting a network node identifier from the captured message, comparing the network node identifier to a database of known network nodes, and, if the network node identifier is not associated with a known network node, then adding an entry for a new network node to the database, wherein the new network node entry includes the network node identifier.Type: ApplicationFiled: March 5, 2008Publication date: October 2, 2008Applicant: TEKTRONIX, INC.Inventors: SRIKANTH CHINNAPAREDDY, SIRISH DAVULURI, BALAJI RATAKONDA
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Publication number: 20080239988Abstract: Aspects of a method and system for network infrastructure offload traffic filtering are disclosed and may include a networked device, or station, which may communicate one or more filters to an infrastructure networking device. The infrastructure networking device may utilize the filters to implement filtering rules upon traffic received by the infrastructure networking device on behalf of the station. Based on the filters, the infrastructure networking device may determine whether to transmit received traffic to the station via a network, or whether to discard received traffic. The infrastructure networking device may perform traffic shaping based on the filters.Type: ApplicationFiled: March 27, 2008Publication date: October 2, 2008Inventors: Henry Ptasinski, Raymond Hayes
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Publication number: 20080239989Abstract: The present invention provides a method for route and resource allocation. One embodiment of the method includes determining at least one network variable associated with a network that includes a plurality of nodes connected by a plurality of links. The network variable(s) are determined based on a plurality of basic loads associated with the plurality of links and a plurality of data rates associated with the plurality of links. The method also includes determining at least one communication variable based on the determined network variable(s) and allocating at least one resource for communication over the network based on the determined network variable(s) and the determined communication variable(s).Type: ApplicationFiled: February 26, 2008Publication date: October 2, 2008Inventor: Armin Dekorsy
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Publication number: 20080239990Abstract: A networking apparatus electrically connectable with a removable device and an external device through a network is provided. The networking apparatus includes a removal instruction receiving unit to receive a disconnection instruction to electrically disconnect the removable device from the networking apparatus, an approval inquiry transmission unit to transmit an inquiry for approval for the removal of the removable device to the external terminal device, an approval receiver unit to receive the approval for removal from the external terminal device, a connection control unit to control electrical connection and disconnection between the removable device and the networking apparatus, and a disconnection unit to electrically disconnect the removable device from the networking apparatus based on the control of the connection control unit.Type: ApplicationFiled: March 20, 2008Publication date: October 2, 2008Inventor: Kiyotaka Ohara
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Publication number: 20080239991Abstract: A method and apparatus for provide highly efficient traffic routing for a wide range of possible traffic matrices (TM) in an intra-domain network. That routing optimally balances the traffic loads over a range of traffic matrices so as to minimize the deviation for any particular traffic matrix from the optimal routing. Such a routing provides a guaranteed performance ratio against the best possible network routing. The invention utilizes a method of optimally configuring a traffic network based on solving a linear program to obtain the optimal routing, and then configuring the routing on the network accordingly.Type: ApplicationFiled: June 3, 2008Publication date: October 2, 2008Inventors: David Lee Applegate, Edith Cohen