Patents Assigned to Telecordia Technologies, Inc.
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Patent number: 9094412Abstract: A self-organizing IP multimedia subsystem exhibiting node splitting and node merging functions wherein any node within the self organizing IP multimedia subsystem may assume any role thereby providing node balancing and fault tolerance to an overall network.Type: GrantFiled: April 30, 2010Date of Patent: July 28, 2015Assignee: Telecordia Technologies, Inc.Inventors: Ashutosh Dutta, Dana Chee, Christian Makaya, Subir Das, Fuchun Joseph Lin, Ming Lai, Tsunehiko Chiba, Satoshi Komorita, Hidetoshi Yokota
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Patent number: 8817990Abstract: A media-independent handover key management architecture is disclosed that uses Kerberos for secure key distribution among a server, an authenticator, and a mobile node. In the preferred embodiments, signaling for key distribution is based on re-keying and is decoupled from re-authentication that requires EAP (Extensible Authentication Protocol) and AAA (Authentication, Authorization and Accounting) signaling similar to initial network access authentication. In this framework, the mobile node is able to obtain master session keys required for dynamically establishing the security associations with a set of authenticators without communicating with them before handover. By separating re-key operation from re-authentication, the proposed architecture is more optimized for a proactive mode of operation. It can also be optimized for reactive mode of operation by reversing the key distribution roles between the mobile node and the target access node.Type: GrantFiled: January 10, 2008Date of Patent: August 26, 2014Assignees: Toshiba America Research, Inc., Telecordia Technologies, Inc.Inventor: Yoshihiro Oba
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Patent number: 8781473Abstract: A solution framework is employed that includes defining of a mechanism to run multiple queries in a single message exchange, along with a priority on a per-query basis. In some embodiments, a system for facilitating handover of a mobile device across heterogeneous access networks by ensuring response to queries transmitted by the mobile device includes: a) a mobile device having a plurality of wireless network interfaces for communicating over a plurality of heterogeneous access networks, having a media independent handover (MIH) entity to facilitate handovers between the heterogeneous networks, and configured to transmit queries related to handover operation between the heterogeneous access networks to MIH entities within said heterogeneous access networks; and b) said media independent handover entity of said mobile device being configured to transmit multiple queries in a single message exchange to an MIH entity in an access network with prioritization among said multiple queries.Type: GrantFiled: December 23, 2011Date of Patent: July 15, 2014Assignees: Toshiba America Research, Inc., Telecordia Technologies, Inc.Inventors: Yoshihiro Oba, Yuu-Heng Alice Cheng, Subir Das, Kenichi Taniuchi
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Publication number: 20110035094Abstract: A system and method for automatic fault detection of a machine is described. In one embodiment, a semantic structure is constructed using the words and values associated with the parameter identification numbers used by the on-board diagnostic system in a vehicle. The semantic structure is enhanced, analyzed, and reduced to determine the number and arrangement of the clusters that should be independently analyzed in order to produce the most reliable results in a computationally efficient manner. Each cluster is then used to detect outliers that are used to detect vehicle malfunctions.Type: ApplicationFiled: August 4, 2009Publication date: February 10, 2011Applicant: Telecordia Technologies Inc.Inventors: Eric Van Den Berg, Allen McIntosh
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Publication number: 20110013712Abstract: An adaptive wireless multiple-input multiple-output (MIMO) system switches among two or more modes of operation including Uninformed Transmitter (UT) and Informed Transmitter (IT) modes based on channel conditions as reflected in a set of metrics including a temporal selectivity metric (TSM) indicative of the temporal dynamics of the MIMO channel. In an exemplary embodiment, the adaptive MIMO system uses a dominant eigenmode IT mode of operation if a signal-to-noise ratio is below a threshold, otherwise, the system uses an IT mode or a UT mode based on the TSM. If the TSM indicates a channel that is changing too rapidly for feedback to be effective, the UT mode is used, otherwise the IT mode is used. Overall system capacity in time varying MIMO channels is thereby improved.Type: ApplicationFiled: January 21, 2010Publication date: January 20, 2011Applicant: Telecordia Technologies, Inc.Inventors: Carol C. Martin, John C. Koshy, Joseph C. Liberti, Anthony A. Triolo
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Publication number: 20100318520Abstract: A system and method for processing commentary that is related to content is provided. In an illustrative embodiment, the system and method involves receiving commentary that is related to content and which is generated after generation of the content, and generating data associating the commentary with the content by at least one of spatially linking the commentary to the content or temporally linking the commentary to the content.Type: ApplicationFiled: May 25, 2010Publication date: December 16, 2010Applicants: Telecordia Technologies, Inc., Kabushiki Kaisha ToshibaInventors: Shoshana K. Loeb, David Famolari
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Patent number: 7768975Abstract: The present invention relates to the reduction of handoff delays for mobile telematics applications. In particular, the present invention provides a method employing GPS technology to define IP addresses in a mobile environment in order to reduce delays and transient data loss caused by handoff from one network to another.Type: GrantFiled: March 29, 2004Date of Patent: August 3, 2010Assignees: Telecordia Technologies, Inc., Toyota Motor CorporationInventors: Ashutosh Dutta, Wai Chen, Onur Altintas, Sunil Madhani, Yoshihisa Suwa, Shengwei Cai
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Patent number: 7729325Abstract: A system and method that addresses the issue of inducing and exploiting multi-user diversity in, e.g., a WLAN system in a fully distributed and opportunistic manner. In some embodiments, the system includes: an access point having a variable beamformer configured to fluctuate signal strength as perceived by stations within a range of the access point; and a plurality of stations having modified distributed-MAC protocol such as to be channel-aware and opportunistic.Type: GrantFiled: April 5, 2005Date of Patent: June 1, 2010Assignees: Toshiba America Research, Inc., Telecordia Technologies, Inc.Inventors: Praveen Gopalakrishnan, David Famolari, Shuichi Obayashi, Raziq Yaqub
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Patent number: 7359730Abstract: The present invention provides for a method and apparatus for reducing interference associated with wireless communication in an area having sensitive electronic equipment. A wireless communications device receives, from an access point, a signal having a signal strength above a predetermined threshold. The wireless communications device determines a transmission power level maximum based on the received signal and then transmits a signal to the access point at a transmission power level at or below the transmission power level maximum. The wireless communications device disables the transmission when the signal strength falls below the predetermined threshold.Type: GrantFiled: April 29, 2005Date of Patent: April 15, 2008Assignee: Telecordia Technologies, Inc.Inventors: Gary J. Dennis, Steven M. Cohen, James L. Dixon
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Patent number: 6968052Abstract: Method and apparatus to generate a dynamic contact list of contact and presence information about contact events in a communication system when a calling entity unsuccessfully attempts to communicate with a called entity. When such a contact event occurs, a routing processor or call agent generates contact information about the contact event, including the calling party, called party, time of the contact event, and purpose of the contact event. A presence management processor also generates the presence information about the calling party's subsequent availability for return communication, including if a calling party is available for return communication, when the calling party is available for return communication, how long the calling party is available for return communication, and how the calling party is available for return communication.Type: GrantFiled: January 24, 2001Date of Patent: November 22, 2005Assignee: Telecordia Technologies, Inc.Inventor: John R. Wullert, II
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Patent number: 6898430Abstract: Reliable transferring of data between mobile wireless nodes positioned at two points in a wireless network occurs through the dynamic formation of transmit/receive groups that collectively establish reliable communications. A mobile node at each point creates a neighbor list by periodically probing its surroundings to discover nearby nodes with which it can relaibly communicate. Prior to establishing a route or transmitting data, a node A first probes a distant next point in the network to determine if it can reliably communicate with that point. Upon receiving this probe and knowing one's neighbors, the nodes at this distant point dynamically form a receive group and choose a controlling node. Members of the group individually receive all future data from node A and pass the received data to the controlling node, which combines the individual signals for reliable reception.Type: GrantFiled: October 27, 2000Date of Patent: May 24, 2005Assignee: Telecordia Technologies, Inc.Inventors: Joseph C. Liberti, Joseph E. Wilkes, Paul G. Zablocky
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Patent number: 6885746Abstract: Crosstalk between subscriber loops used to transmit different broadband services through the same bundled telephone cable is a significant limitation to providing digital subscriber line services. A method for estimating the crosstalk, identifying the sources of the crosstalk and predicting additional sources of crosstalk are disclosed. The crosstalk sources are identified in the frequency domain by maximizing the correlation with a “basis set” of received crosstalk PSDs which consist of the cascade of a finite set of known transmit PSDs types times a representative set of crosstalk couplings. Multiple crosstalk types are identified with a technique of successive spectral subtraction. Once a type is identified the crosstalk disturber is compared against all other members of the complete set for that type. Additionally, Mutliple Regression (MR) techniques and a Matching Pursuit (MP) algorithm are used to increase the ability of the system and method to identify various crosstalk disturbers.Type: GrantFiled: July 31, 2002Date of Patent: April 26, 2005Assignee: Telecordia Technologies, Inc.Inventors: Robert Hausman, Stefano Galli, Kenneth Kerpez
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Patent number: 6625270Abstract: A method and system for restricting telephone access to a predetermined set of telephone numbers. The method includes comparing the output of a caller ID signal decoder to telephone numbers stored in memory and allowing the telephone call to be completed if there is match between the calling party's number and a number stored in memory. The system consists of connection circuitry to which is connected a caller ID decoder, a number comparator, and an off hook detector. These components interact to restricts calls to only those stored in the number comparator.Type: GrantFiled: September 9, 1999Date of Patent: September 23, 2003Assignee: Telecordia Technologies, Inc.Inventors: Thomas C. Banwell, Ariel Dori, Keku M. Mistry, Thomas J. Robe
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Patent number: 6438150Abstract: An edge-emitting laser formed in an opto-electronic chip and having an emission wavelength determined by dielectric interference filter formed on opposing facets between which said laser extends. The two interference filter are each respective Fabry-Perot etalon filters having two interference mirrors sandwiching a resonant dielectric cavity layer so that the filter manifests a flat reflectance spectrum with a deep reflectance notch in its center. The two filters are fabricated with wavelengths of their notches differing by about 2%. The sum of the two filter transmittances represents round-trip cavity loss and has a double-peaked shape with a sharp minimum between the two notch wavelengths. The wavelength of the sum minimum determines the lasing wavelength without the need for a Bragg grating being incorporated within the chip. The invention can be applied to multi-wavelength edge-emitting lasers including multiple laser stripes by applying filters of different wavelengths to the ends of different stripes.Type: GrantFiled: March 9, 1999Date of Patent: August 20, 2002Assignee: Telecordia Technologies, Inc.Inventor: Sung Joo Yoo
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Patent number: 6226640Abstract: A method and system identify in a database one or more data entries that are the nearest neighbors of a query. The database prebuilds a first set of strings by probabilistically selecting values of respective bits in each of the first set of strings based on a probability that depends on a first hamming distance. Based on the first set of strings, the database predetermines the trace values of each data entry in the database, respectively, and stores the predetermined trace values as entries in a trace table. For each trace value entry, the database identifies the data entries whose trace values are within a second hamming distance of the trace value entry, and stores the addresses of the identified data entries in the trace value entry. When the database receives a query, by identifying the trace value entry in the trace table that match the trace value of the query, the database identifies the data entries that are within the first hamming distance of the query.Type: GrantFiled: November 17, 1998Date of Patent: May 1, 2001Assignee: Telecordia Technologies, Inc.Inventors: Rafail Ostrovsky, Yuval Rabani
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Patent number: 6041330Abstract: An innovative rule based method and system for creating test cases for the Year 2000 compliance testing of software systems is described. Using the method and system of the present invention, the user will first input information as rules relating to the business logic of the system. After obtaining the business logic, the system will transform input test cases into output test cases for the Year 2000 compliance testing. The term test cases, used in a broad sense here, refer to regression test cases written in any test automation languages, archive of test input/output data files, or snap shots of transactions captured using a recording tool. The system operates by first parsing the input files and based upon the business logic, it identifies date, time, or duration dependent variables or constants ("date dependent fields" collectively) in the input test cases. The system then substitutes risky dates, time, or duration for these fields in a manner which preserves the business logic.Type: GrantFiled: July 20, 1998Date of Patent: March 21, 2000Assignee: Telecordia Technologies, Inc.Inventors: David Carman, Siddhartha R. Dalal, Ashish Jain, Nachimuthu Karunanithi
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Patent number: 6009326Abstract: An anchor RS acts as the single interface between the switched telephone network and the wireless communications system throughout an entire call, even if the subscriber unit travels to different radio systems during the call. This allows (1) the signaling to set up the connections between the anchor and target RPCUs; and (2) the maintenance information for the call to remain in the anchor RPCU, which is connected to the original switch. This avoids tying up network switches with exchanging signals and call maintenance information about service features, thus resulting in a substantial "savings" in valuable telephone network resources. Also, existing switches do not need to be replaced or reconfigured to accommodate this hand over method.Type: GrantFiled: November 14, 1995Date of Patent: December 28, 1999Assignee: Telecordia Technologies, Inc.Inventors: Paul William Roder, Mehmet Ulema