Patents by Inventor Jagan Seshadri

Jagan Seshadri has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7983172
    Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: July 19, 2011
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Publication number: 20110086653
    Abstract: Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.
    Type: Application
    Filed: December 16, 2010
    Publication date: April 14, 2011
    Applicant: Fujitsu Limited
    Inventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Patent number: 7877097
    Abstract: Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 25, 2011
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Publication number: 20100061248
    Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.
    Type: Application
    Filed: November 16, 2009
    Publication date: March 11, 2010
    Applicant: Fujitsu Limited
    Inventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Patent number: 7643429
    Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 5, 2010
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Publication number: 20080171551
    Abstract: One or more stations are sorted based on respective load levels, and a reuse pattern is generated, based on the sorted load levels and mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in order based on their respective load levels, and an additional station is added to a reuse set, as long as the cumulative transmission level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.
    Type: Application
    Filed: July 13, 2007
    Publication date: July 17, 2008
    Applicant: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre, Dorin Viorel, Jagan Seshadri
  • Publication number: 20080107035
    Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.
    Type: Application
    Filed: July 13, 2007
    Publication date: May 8, 2008
    Applicant: Fujitsu Limited
    Inventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Publication number: 20080108359
    Abstract: Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.
    Type: Application
    Filed: July 13, 2007
    Publication date: May 8, 2008
    Applicant: Fujitsu Limited
    Inventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
  • Publication number: 20070173303
    Abstract: A system, method, and apparatus for selecting a set of antennas, for use during operation of a radio system, from a plurality of antennas. The system, method and apparatus may include selecting one antenna that is part of an array of antennas. Then measuring characteristics of radio signals received at the antenna. The selection and measuring of characteristic is repeated for a desired number of antennas in the array. Then, the measurements are combined, and the combinations of antennas are ranked based upon the combined measurement. From the ranking combinations of antennas are selected for use during operation of a radio system.
    Type: Application
    Filed: December 12, 2006
    Publication date: July 26, 2007
    Inventors: Dorin Viorel, Ronald Murias, Jagan Seshadri